Page 1: Service Manual
SERVICE MANUAL MULTIFUNCTIONAL DIGITAL SYSTEMS e-STUDIO350/450 e-STUDIO352/452 e-STUDIO353/453 Model: DP-3520/3540/4520/4540 Publish Date: November 2003 File No. SME030028I0 R03092140702-TTEC Ver09_2008-04...
Page 2 ©2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved Under the copyright laws, this manual cannot be reproduced in any form without prior written permission of TOSHIBA TEC CORPORATION. No patent liability is assumed, however, with respect to the use of the information contained herein.
Page 3 GENERAL PRECAUTIONS REGARDING THE INSTALLATION AND SERVICE FOR e-STUDIO350/352/353/450/452/453 The installation and service should be done by a qualified service technician. 1. Transportation / Installation • When transporting/installing the equipment, employ two persons and be sure to use the positions as indicated below. The equipment is quite heavy and weighs approximately 83kg (182.98 lb.): e-STUDIO350/450 / 86kg (189.59 lb): e-STUDIO352/353/452/453 therefore pay full attention when handling it. • Be sure not to hold the movable parts or units (e.g. the control panel, ADU or RADF) when transporting the equipment. • Be sure to use a dedicated outlet with AC 110V/13.2A, 115V or 127V / 12A, 220-240V or 240V / 8A for its power source. • The equipment must be grounded for safety. Never ground it to a gas pipe or a water pipe. • Select a suitable place for installation. Avoid excessive heat, high humidity, dust, vibration and direct sunlight.
Page 4 - Do not insert tools, parts, etc. that are reflective into the path of the laser beam. - Remove all watches, rings, bracelets, etc. that are reflective. • Unplug the power cable and clean the area around the prongs of the plug once a year or more. A fire may occur when dust lies on this area. 3. Main Service Parts for Safety • The breaker, door switch, fuse, thermostat, thermofuse, thermistor, etc. are particularly important for safety. Be sure to handle/install them properly. If these parts are shorted circuit and/or made their functions out, they may burn down, for instance, and may result in fatal accidents. Do not allow a short circuit to occur. Do not use the parts not recommended by Toshiba TEC Corporation. 4. Cautionary Labels • During servicing, be sure to check the rating plate and the cautionary labels such as “Unplug the power cord during service”, “Hot area”, “Laser warning label” etc. to see if there is any dirt on their surface and whether they are properly stuck to the equipment. 5. Disposition of Consumable Parts, Packing Materials, Used batteries and RAM-ICs • Regarding the recovery and disposal of the equipment, supplies, consumable parts, packing materials, used batteries and RAM-ICs including lithium batteries, follow the relevant local regulations or rules. 6. Reassembly of disassembled parts is the reverse of the disassembly unless otherwise noted in this manual or other related documents.
Page 5: Table Of Contents
3.3 Comparison with DP4500/3500 ..................3-10 4. GENERAL OPERATION ....................4-1 4.1 Overview of Operation ......................4-1 4.2 Description of Operation ......................4-1 4.2.1 Warming-up .......................4-1 4.2.2 Ready state (ready for copying) ................4-2 4.2.3 Drawer feed copying (Upper drawer paper feeding) ..........4-2 4.2.4 Bypass feed copying ....................4-5 4.2.5 Interruption copying ....................4-5 4.3 Detection of Abnormality ......................4-6 4.3.1 Types of abnormality ....................4-6 4.3.2 Description of abnormality ..................4-7 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 CONTENTS 05/11...
Page 6 6.7 Disassembly and Replacement ..................6-16 7. IMAGE PROCESSING ....................7-1 7.1 General Description ......................7-1 7.2 Configuration ........................7-3 7.3 SLG Board ...........................7-4 7.3.1 Features ........................7-4 7.3.2 Functions of image processing circuit ...............7-5 7.4 LGC Board ...........................7-9 7.4.1 Features ........................7-9 7.4.2 Functions of image processing circuit ...............7-9 7.5 Laser Driving PC Board (LDR board) .................7-10 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 CONTENTS...
Page 7 11.3 Output Control Circuits of High-Voltage Transformer ............11-5 11.3.1 Overview .........................11-5 11.3.2 Description of operations ..................11-5 11.4 Drum Temperature Detection Circuit ..................11-7 11.5 Temperature/Humidity Sensor ....................11-8 11.5.1 General description ....................11-8 11.5.2 Construction ......................11-8 11.6 Disassembly and Replacement ..................11-9 12. DEVELOPMENT SYSTEM ..................12-1 12.1 Configuration ........................12-1 12.2 Functions ..........................12-2 12.3 Drive Circuit of Toner Motor ....................12-3 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 CONTENTS...
Page 8 13.7 Disassembly and Replacement ..................13-16 14. AUTOMATIC DUPLEXING UNIT (ADU) ..............14-1 14.1 General Description ......................14-1 14.2 Description of Operations ....................14-2 14.3 Drive of ADU ........................14-8 14.4 Flow Chart ..........................14-9 14.5 Disassembly and Replacement ..................14-11 15. POWER SUPPLY UNIT ....................15-1 15.1 Construction ........................15-1 15.2 Operation of DC Output Circuits ..................15-1 15.3 Output Channel ........................15-2 15.4 Fuse ...........................15-4 15.5 Configuration of Power Supply Unit ...................15-5 15.6 Sequence of Power Supply ....................15-6 15.7 AC Wire Harness ......................15-7 16. PC BOARDS .......................16-1 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 CONTENTS...
Page 9: Specifications / Accessories / Options / Supplies
A4, LT, B5 A4-R, B5-R, – A5-R, LT-R, ST-R B4, LG – A3, LD – e-STUDIO450/452/453 Paper size Bypass feed Drawer Size specified Size not specified Paper size A4, LT, B5 A4-R, B5-R, – A5-R, LT-R, ST-R B4, LG – A3, LD – “–” means “Not acceptable”. The copy speed in the above table are available when originals are manually placed for single side, multiple copying. When the RADF is used, the copy speed of 35[45] sheets per minute is only available under the fol- lowing conditions: • Original/Mode: Single side original/A4/LT size. APS/automatic density are not selected. • Number of sheets: 35[45] or more. • Paper feeding: • Reproduction ratio: 100% © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 1 - 1 e-STUDIO350/352/353/450/452/453 SPECIFICATIONS 07/11...
Page 10 LD to ST-R sizes can be set.) 64 to 209 g/m2, 17 to 55 lb. 64 to 105 g/m2 (Continuous feeding) Weight 17 to 28 lb. 50 to 209 g/m2, 13 to 55 lb. (Single paper feeding) Special Tracing paper, labels, OHP film These special papers paper (thickness: 80 µm or thicker) recommended by Toshiba Tec • First copy time ....e-STUDIO350/352/353: Approx. 3.9sec. or less e-STUDIO450/452/453: Approx. 3.9sec. or less (A4/LT, upper drawer, 100%, original placed manually) • Warming-up time ....Approx. 20 seconds (temperature: 20°C) • Multiple copying ....Up to 999 copies; Key in set numbers • Reproduction ratio ..... Actual ratio: 100±0.5% Zooming: 25 to 400% in increments of 1% (25 to 200% when using RADF) • Resolution/Gradation ..Scanning: 600 dpi x 600 dpi ..Printing: Equivalent to 2400 dpi x 600 dpi .
Page 11 • Automatic duplexing unit .. Stackless, Switchback type • Toner supply ..... Automatic toner density detection/supply Toner cartridge replacing method • Density control ....Automatic density mode and manual density mode selectable in 11 steps • Weight ......83 kg, 183 lb. (e-STUDIO350/450) 86 kg, 189.59 lb. (e-STUDIO352/353/452/453) • Power requirements ..AC 110V (±10%) / 13.2A, 115V (±10%) or 127V (±10%) / 12A 220-240V (±10%) or 240V (±10%) / 8A • Power consumption ..1.5 kW or less (115V series, 200V series) The electric power is supplied to the RADF, Finisher, Job Separator, Offset Tray, PFP and LCF through the equipment. • Total counter ..... Electronical counter © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 1 - 3 e-STUDIO350/352/353/450/452/453 SPECIFICATIONS 07/11...
Page 12 • Dimensions of the equipment ..See the figure below W660 x D718 x H739 mm (e-STUDIO350/450) W660 x D758 x H739 mm (e-STUDIO352/353/452/453) * When the tilt angle of the control panel is 45 degrees. 45˚ Fig. 1-101 e-STUDIO350/352/353/450/452/453 1 - 4 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved SPECIFICATIONS 07/11...
Page 13: Accessories
Toner cartridge 1 pc. (except for NAD, MJD) Developer material 1 pc. (except for NAD,MJD) Operation panel stopper 1 pc. Blind seal 1 pc. Rubber plug 4 pcs. CD-ROM 4 pcs. Platen cover 1 pc. (for CND) * Machine version NAD: North America MJD: Europe AUD: Australia ASD: Central and South America / Hong Kong / Asia TWD: Taiwan SAD: Saudi Arabia JPD: Japan CND: China ASU: Asia KRD: Korea © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 1 - 5 e-STUDIO350/352/353/450/452/453 SPECIFICATIONS 05/11...
Page 14: Options
Work Tray KK-3511 Damp Heater MF-3520 U/E Fax Board GD-1150 NA/AU/EU/TW/C/AS 2nd Line for Fax Board GD-1160 NA/EU/TW/C Wireless LAN Adapter GN-1010 PCI Slot GO-1030 Scrambler Board GP-1030 Printer Kit GM-1010 Printer/Scanner Kit GM-2010 Scanner upgrade Kit GM-3010 Desk MH-1700 Data overwrite kit GP-1050 * 1) N : North America E : Europe F : France S : Sweden Notes: 1. The bridge unit (KN-3520) is necessary for installation of the finisher (MJ-1022, MJ-1023 or MJ-1024). 2. The finisher (MJ-1023 or MJ-1024) is necessary for installation of the hole punch unit (MJ-6004N/E/F/S). 3. The PCI slot (GO-1030) is necessary for installation of the scrambler board (GP-1030). e-STUDIO350/352/353/450/452/453 1 - 6 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved SPECIFICATIONS 05/11...
Page 15 GD-1160NA/EU-N/C/TW Printer kit GM-1060/1061 Printer/Scanner kit GM-2060/2061 Scanner kit GM-4060 Printer ELK GM-1120 Printer/Scanner ELK GM-2120 Scannner ELK GM-4120 Memory GC-1230 Scrambler board GP-1040 Wireless LAN module GN-1041 Bluetooth module GN-2010 Antenna GN-3010 Data overwrite kit GP-1060 PCI slot GO-1060 e-BRIDGE ID Gate (HID iClass) KP-2004 e-BRIDGE ID Gate (MIFARE) KP-2005 Desk MH-1700 Harness kit for coin controller GQ-1020 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 1 - 7 e-STUDIO350/352/353/450/452/453 SPECIFICATIONS 08/04...
Page 16 6. The Printer kit (GM-1060) or Printer/Scanner kit (GM-2060) does not have a function for printing an XPS file. 7. To enable an XPS file to be printed by the Printer kit (GM-1061) or Printer/Scanner kit (GM-2061), the Memory (GC-1230) is required to be installed. 8. To enable an XPS file to be printed by the Printer ELK (GM-1120) or Printer/Scanner ELK (GM-2120), the Memory (GC-1230) is required to be installed. e-STUDIO350/352/353/450/452/453 1 - 8 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved SPECIFICATIONS 07/11...
Page 17: Supplies
1.4 Supplies Drum OD-3500 Toner bag PS-TB3520 /E/N *2 PS-ZT3520 /T/D/C/E *3 (e-STUDIO350/352/450/452) Toner cartridge PS-ZT3520 C *3, PS-ZT4520 /E *3 (e-STUDIO353/453) Developer D-3500 * 2) N : Asia E : Europe NONE : North America * 3) T : Taiwan D : Asia C : China E : Europe NONE : North America © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 1 - 9 e-STUDIO350/352/353/450/452/453 SPECIFICATIONS 07/11...
Page 21: Outline Of The Machine
2. OUTLINE OF THE MACHINE 2.1 Sectional View 5,5 3 4 2 4 47 70 7 20,2 20,2 Fig. 2-101 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 1 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 22 Developer sleeve (magnetic roller) Drawer empty sensor Fuser roller Drawer paper stock sensor Pressure roller Drawer damp heater (JPD only) Cleaning roller Registration roller IH coil Registration sensor Main thermistor / Edge thermistor Upper drawer feed sensor Separation finger for fuser roller Lower drawer feed sensor Separation finger for pressure roller Exit sensor Exit roller ADU upper transport roller Fuser thermostat ADU middle transport roller Middle fan ADU lower transport roller Exhaust fan ADU entrance sensor Sub-separation fan ADU exit sensor Power supply cooling fan Bypass pickup roller Main switch Bypass feed roller Front cover opening/closing switch Bypass feed sensor Cover opening/closing interlock switch Bypass tray Polygonal motor e-STUDIO350/352/353/450/452/453 2 - 2 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 04/05...
Page 24 Platen sensor Fuser unit cooling fan Scan motor Registration clutch Carriage home position sensor ADU motor Scanner damp heater (Left) ADU clutch Scanner damp heater (Right) Bypass pickup solenoid Scanner damp heater thermostat Bypass feed clutch IH board cooling fan Side cover opening/closing switch Developer unit cooling fan-1 Transport clutch (High speed) Toner motor Transport clutch (Low speed) Developer drive clutch Lower drawer feed clutch Main motor Tray-up motor Exit motor Drawer detection switch Toner bag full detection sensor-1 Upper drawer feed clutch ADU opening/closing switch Developer unit cooling fan-2 e-STUDIO350/352/353/450/452/453 2 - 4 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 25: Electric Parts Layout
2.2 Electric Parts Layout [A] Unit construction Drive unit PC board unit Scanner unit Control panel unit Fuser unit Automatic duplexing unit Bypass unit Transport unit Process unit Laser unit Front side Paper feeder unit Fig. 2-201 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 5 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 26 [B] Scanner unit (B-1) Motor, sensor, lamp A4 series Front side Fig. 2-202-1 LT series Front side Fig. 2-202-2 e-STUDIO350/352/353/450/452/453 2 - 6 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 27 (B-2) PC board, heater, thermostat, other part DH2* THMO2* DH1* Front side Fig. 2-203 * ASD/AUD/CND/SAD/TWD models : Standard NAD/MJD models : Option [C] Control panel unit Front side Fig. 2-204 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 7 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 28 [D] Process unit (D-1) Motor, sensor, switch, PC board Front side Fig. 2-205 (D-2) Motor, sensor, lamp, heater, thermistor, thermostat THMO3* THM3 DH3* Front side * ASD/AUD/CND/SAD/TWD models : Standard NAD/MJD models : Option Fig. 2-206 e-STUDIO350/352/353/450/452/453 2 - 8 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 29 [E] Laser unit Front side Fig. 2-207 [F] Paper feeder unit CLT1 CLT2 Front side Fig. 2-208 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 9 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 30 [G] Transport unit Front side Fig. 2-209 [H] Bypass unit CLT3 SOL1 Front side Fig. 2-210 e-STUDIO350/352/353/450/452/453 2 - 10 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 31 Automatic duplexing unit CLT4 Front side Fig. 2-211 [J] Fuser unit THMO1 IH-COIL THM1 THM2 Front side Fig. 2-212 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 11 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 33 [L] PC board unit e-STUDIO350/450 FIL or FUS* Front side * NAD/SAD/TWD models : FIL (Standard) ASD/AUD/CND models : FUS (Standard) MJD model : FUS (Option) Fig. 2-214 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 13 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE 05/11...
Page 34 Front side * NAD/SAD/TWD models : FIL (Standard) ASD/AUD/CND models : FUS (Standard) MJD model : FUS (Option) Fig. 2-215 e-STUDIO350/352/353/450/452/453 2 - 14 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 07/11...
Page 35: Symbols And Functions Of Various Components
Exhausting ozone P11 - I2 Exhaust fan SP-FAN-MOT Assisting the paper separation process P11 - I2 Sub-separation fan (Absorbing the paper from the drum) FUS-FAN-MOT Cooling down the fuser unit P30 - I13 Fuser unit cooling fan IH-FAN-MOT Cooling down the IH board P7 - I12 IH board cooling fan DEV-FAN-MOT1 Cooling down the developer unit P6 - I18 Developer unit cooling fan-1 DEV-FAN-MOT2 Cooling down the developer unit P6 - I39 Developer unit cooling fan-2 PS-FAN-MOT Cooling down the power supply unit P9 - I7 Power supply cooling fan HDD-FAN-MOT Cooling down the HDD and SYS P7 - I16 HDD cooling fan board * e-STUDIO352/353/452/453 only © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 15 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE 07/11...
Page 36 FED-L-SNR Detecting paper jam and paper P19 - I5 Lower drawer feed sensor transport at lower drawer feeding section CST-U-TRY-SNR Position detection of the lifting tray of P14 - I30 Upper drawer tray-up sensor the upper drawer CST-L-TRY-SNR Position detection of the lifting tray of P14 - I30 Lower drawer tray-up sensor the lower drawer EMP-U-SNR Paper presence/absence detection in P14 - I30 Upper drawer empty sensor the upper drawer EMP-L-SNR Paper presence/absence detection in P14 - I30 Lower drawer empty sensor the lower drawer NEMP-U-SNR Paper amount detection in the upper P14 - I30 Upper drawer paper stock sensor drawer NEMP-L-SNR Paper amount detection in the lower P14 - I30 Lower drawer paper stock sensor drawer e-STUDIO350/352/353/450/452/453 2 - 16 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 37 ADU-TRU-SNR Detecting the transporting paper at P32 - I31 ADU entrance sensor automatic duplexing unit entrance section ADU-TRL-SNR Detecting the transporting paper in P32 - I31 ADU exit sensor automatic duplexing unit EXIT-SNR Detecting the transporting paper at P31 - I21 Exit sensor the exit section MAIN-SW Turning ON/OFF of the equipment P5 - I10 Main switch FRNT-COV-SW Detecting opening/closing of the front P5 - I7 Front cover opening/closing switch cover COV-INTLCK-SW Controlling cutoff and supply of the P5 - I19 Cover opening/closing interlock switch 24V voltage by opening/closing of the front cover or jam access cover SIDE-COV-SW Side cover opening/closing detection P19 - I2 Side cover opening/closing switch © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 17 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 38 P32 - I16 ADU clutch CLT5 RGST-CLT Driving the registration roller P19 - I31 Registration clutch CLT6 DEV-CLK Driving the magnetic roller of the P12 - I36 Developer drive clutch developer unit CLT7 CST-TR-L-CLT Driving the transport roller P15 - I20 Transport clutch (Low speed) (Low speed) CLT8 CST-TR-H-CLT Driving the transport roller P15 - I16 Transport clutch (High speed) (High speed) (4) Solenoids Symbol Name Function Remarks SOL1 SFB-SOL Driving the bypass pickup roller P18 - I11 Bypass pickup solenoid e-STUDIO350/352/353/450/452/453 2 - 18 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 39 P7 - I2 IH control PC board (IH board) unit PWA-F-SYS Controlling the whole system and P7 - I34/ System control PC board (SYS board) image processing P7-I7 PWA-F-LGC Controlling the print engine section P8 - I7 Logic PC board (LGC board) PWA-F-NIC Network connection interface P7 - I22 * e-STUDIO350/450 only NIC board PWA-F-FIL Cutting noise of the AC power P6 - I24 Filter PC board (FIL board) Power supplying to each damp heater * NAD/SAD/TWD models: Standard PWA-F-FUS Supplying the power to each damp P6 - I24 Fuse PC board (FUS board) heater * ASD/AUD/CND models: Standard * MJD model: Option © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 19 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE 05/11...
Page 40 THM1 THMS-C-HTR Detecting the surface temperature at P29 - I10 Main thermistor the center part of the fuser roller THM2 THMS-S-HTR Detecting the surface temperature at P29 - I10 Edge thermistor the edge of the fuser roller THM3 THMS-DRM Detecting the temperature at the P26 - I29 Drum thermistor drum surface THMO1 THERMO-FSR Preventing overheating in the fuser P29 - I9 Fuser thermostat unit THMO2 THERMO-SCN-DH Controlling the temperature of the P10 - I22 Scanner damp heater thermostat scanner damp heater THMO3 THERMO-DRM-DH Controlling the temperature of the P27 - I7 Drum damp heater thermostat drum damp heater e-STUDIO350/352/353/450/452/453 2 - 20 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 41 • Transfer bias • Separation bias (9) Others Symbol Name Function Remarks INV-EXP Controlling the exposure lamp P21 - I7 Inverter board Displaying and entering each P3 - I19 LCD panel information PS-ACC Generating DC voltage and supplying P9 - I7 Switching power supply it to each section of the equipment Storing the program data and image P7 - I25/ Hard disk data P7-I103 NS-FIL Cutting noise of AC power P6 - I13 Noise filter BREAKER Preventing the inflow of overcurrent P6 - I14 Breaker to the equipment © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 21 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE 05/11...
Page 42: General Description
2.4 General Description 2.4.1 System block diagram (1) e-STUDIO350/450 slot external Fig. 2-401 e-STUDIO350/352/353/450/452/453 2 - 22 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 05/11...
Page 44: Construction Of Boards
: e-STUDIO350/450 only : AC power supply line : Signal line Fig. 2-402 (b) Function of each board CCD board: This is the board to convert the reflected light by the original to electrical signals. It consists of the CCD, and its peripheral circuitry. The CCD converts the reflected light by the original to analog signal and outputs it to the SLG board. SLG board: This is the board to mainly control the scanning function (scanner unit) and consists of the Scanner-CPU, ASIC, memory (Flash ROM and SRAM), A/D converter, driver for motor drive, etc. When scanning the original, the exposure lamp and scan motor are driven by the command from the Scanner-CPU. The analog signal output from the CCD board is then converted to digital signal by the A/D converter. Image processing is performed by ASIC. INV board: This is the board on which the lighting control circuit of the exposure lamp is mounted. The expo- sure lamp lights by the command from the Scanner-CPU. DSP board: This is the board to mainly control the control panel. The panel processing CPU detecting the in- put from each button and touch panel, and the lighting control circuit for the backlight of the LCD are mounted. And it relays the control signal of the control panel from the SYS board to the LCD and KEY board. e-STUDIO350/352/353/450/452/453 2 - 24 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 05/11...
Page 45 KEY board: This is the board on which each button switch and each LED on the control panel are mounted. LDR board: This is the board on which the laser diode and the ASIC are mounted. The laser is emitted based on the output image data signal from the ASIC on the LGC board. SNS board: This is the board on which the light sensor for detecting the radiating position of the laser is mounted. It outputs the H-sync signal to ASIC on the LGC board. LRL board: This is the board to relay each signal transmitted between the LGC board and laser unit (LDR and SNS boards). SFB board: This is the board on which the circuit pattern is printed. It detects the position of the slide guide of the bypass unit. ADU board: This is the board to relay each signal between the ASIC on the LGC board and the electric parts (motor, sensor, clutch) in the ADU. IH board: This is the board to generate the electric power for driving the IH coil of the fuser unit from the AC electric power input via the switching power supply. And then it is provided. SYS board: This is the main board taking a leading part in all systems. It consists of the System-CPU, ASIC, memory (DIMM, SDRAM, Flash ROM, SRAM, NVRAM), RTC (Real Time Clock IC), etc. The System-CPU controls each ASIC to perform the control of the image processing, image memory (page memory, main memory, HDD), external interface (RS-232C, IEEE-1284, USB, PCI), NIC and FAX. Based on the input data from the control panel, the System-CPU communicates with the Scanner-CPU on the SLG board and Engine-CPU on the LGC board, and then issues an operation command to the scanner and printer engine section. LGC board: This is the board to mainly control the printing function (printer engine). It consists of the Engine- CPU, ASIC, memory (Flash ROM, SRAM, NVRAM), driver for motor drive, etc. The Engine-CPU controls each ASIC to drive I/O (for the electrical parts) of each section in the system. It leads to the operation of the laser unit, developer unit, drum, drawers, bypass unit, ADU, etc. Thus print- ing is performed. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 25 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 46 NIC board (e-STUDIO350/450 only): This is the interface board to connect this equipment to the LAN environment (10BASE-T, 100BASE-TX) to communicate with PCs, etc. FIL board: This is the board to cut off the noise of AC power from outside, and supply the driving AC power to the damp heater for condensation prevention of each section (scanner and drum). FUS board: This is the board to provide the AC electric power for driving to the damp heater for preventing of the condensation of each section (scanner and drum). HVT: This is the board to generate the DC high voltage from +24V to provide the bias to the section of the main charger, developer, transfer, and separation. PS-ACC: This is the unit to generate each DC voltage, which is used in the equipment, from external AC electric power input. And then it is provided to each electrical part. e-STUDIO350/352/353/450/452/453 2 - 26 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 05/11...
Page 47: Installation And Replacement Of Covers And Pc Boards
2.5 Installation and Replacement of Covers and PC boards 2.5.1 External covers [A] Front cover (1) Open the front cover. Fig. 2-501 (2) Remove the toner bag. Fig. 2-502 (3) Pull up the hinge pin and extract it. (4) Take off the front cover. Fig. 2-503 [B] Front left cover (1) Open the front cover. (2) Remove 1 screw and front left cover. Guide Fig. 2-504 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 27 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 48 [C] Rear cover (C-1) e-STUDIO350/450 (1) Remove 7 screws and take off the rear cover. Fig. 2-505 (C-2) e-STUDIO352/353/452/453 (1) Remove 1 screw and take off the connector cover. Connector cover Fig. 2-506 (2) Remove 2 screws and take off the rear cover-1. Rear cover-1 Fig. 2-507 (3) Remove 3 screws and take off the rear Rear cover-2 cover-2. Note: If the RADF has been installed, disconnect the connector of the RADF before the above step. Fig. 2-508 e-STUDIO350/352/353/450/452/453 2 - 28 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 07/11...
Page 49 [E] Front upper cover (1) Take off the left upper cover ( Chapter 2.5.1 [D]). (2) Remove 2 screws and take off the front up- per cover. Fig. 2-510 [F] Right upper cover (1) Remove 3 screws and take off the right up- per cover. Fig. 2-511 Upper rear cover (1) Take off the RADF or platen cover. (2) Take off the left upper cover ( Chapter 2.5.1 [D]). (3) Take off the right upper cover ( Chapter 2.5.1 [F]). (4) Remove 2 screws and upper rear cover. Fig. 2-512 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 29 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 50 [H] Receiving tray (1) Remove 2 screws and take off the receiving tray. Fig. 2-513 Tray back cover (1) Take off the receiving tray ( Chapter 2.5.1 [H]). (2) Take off the scan base cover. Scan base cover Fig. 2-514 (3) Remove 1 screw and take off the receiving tray back cover. Fig. 2-515 [J] Left cover (1) Remove 3 screws and take off the left cover. Fig. 2-516 e-STUDIO350/352/353/450/452/453 2 - 30 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 04/05...
Page 51 Fig. 2-517 [L] IH terminal cover (1) Open the ADU, jam access cover and fuser unit cover. (2) Remove 2 screws and take off the IH termi- nal cover. Fig. 2-518 [M] Right front hinge cover (1) Pull out the upper and lower drawers. (2) Remove 2 screws and take off the right front hinge cover. Fig. 2-519 [N] Right rear hinge cover (1) Remove 2 screws and take off the right rear hinge cover. Fig. 2-520 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 31 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 52 (2) Take off the IH terminal cover ( Chapter 2.5.1 [L]). (3) Take off the right rear hinge cover Chapter 2.5.1 [N]). (4) Remove 2 screws and take off the right rear cover. Fig. 2-522 [Q] Front right cover (1) Take off the front cover ( Chapter 2.5.1 [A]). (2) Take off the receiving tray ( Chapter 2.5.1 [H]). (3) Take off the right upper cover ( Chapter 2.5.1 [F]). (4) Take off the upper drawer. Open the bypass tray and ADU. (5) Remove 2 screws and take off the front right Fig. 2-523 cover. e-STUDIO350/352/353/450/452/453 2 - 32 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 53: Pc Boards
Fig. 2-524 (3) Disconnect 14 connectors and 1 connector with lock. (4) Remove 4 screws and release 2 locking supports. Then take off the LGC board. Lock connector Fig. 2-525 (A-2) LGC board unit (1) Take off the rear cover ( Chapter 2.5.1 [C]). (2) Loosen 8 screws and take off the LGC board cover. Fig. 2-526 (3) Disconnect 14 connectors, 1 connector with lock and 1 joint connector fixed to the case. Lock connector Fig. 2-527 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 33 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE 04/10...
Page 54 (4) Release all the harnesses from the harness clamps and holders on the case. Fig. 2-528 (5) Remove 5 screws and take off the LGC board with the whole case. Fig. 2-529 [B] Hard disk / HDD cooling fan (B-1) e-STUDIO350/450 (1) Take off the rear cover ( Chapter 2.5.1 [C]). (2) Loosen 9 screws and take off the SYS board upper cover. Fig. 2-530 (3) Disconnect 2 connectors. (4) Loosen 5 screws and take off the hard disk with the whole SYS board lower cover. Fig. 2-531 e-STUDIO350/352/353/450/452/453 2 - 34 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 05/11...
Page 55 (5) Remove 4 screws and take off the hard disk. Fig. 2-532 (B-2) e-STUDIO352/353/452/453 (1) Take off the rear cover-1. chapter 2.5.1[C]) (2) Disconnect 1 connector. Release the har- ness from harness clamps. Fig. 2-533 (3) Loosen 10 screws and take off the SYS board cover. SYS board cover Fig. 2-534 (4) Disconnect 2 connectors. Fig. 2-535 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 35 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE 07/11...
Page 56 Hard disk and take off the hard disk. Remove 1 screw and take off the ground wire. Ground wire Fig. 2-537 (7) Remove 2 screws and take off the HDD HDD cooling fan cooling fan from the SYS board cover. Fig. 2-538 [C] System control PC board case (SYS board case) (C-1) e-STUDIO350/450 (1) Take off the rear cover ( Chapter 2.5.1 [C]). (2) Take off the hard disk with the whole SYS board lower cover ( Chapter 2.5.2 [B]). (3) Disconnect 4 connectors. Fig. 2-539 e-STUDIO350/352/353/450/452/453 2 - 36 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 05/11...
Page 57 (4) Release all the harnesses from harness clamps and holders on the case. Fig. 2-540 (5) Remove 5 screws and take off the SYS board case. Fig. 2-541 (C-2) e-STUDIO352/353/452/453 (1) Take off the connector cover and rear cover-1. ( chapter 2.5.1 [C]) (2) Take off the hard disk with the whole brack- ets. ( chapter 2.5.2 [B]) (3) Disconnect 4 connectors. Fig. 2-542 (4) Release the harnesses from 2 harness clamps. Fig. 2-543 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 37 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE 07/11...
Page 58 [D] NIC board / System control PC board (SYS board) (D-1) e-STUDIO350/450 (1) Take off the rear cover ( Chapter 2.5.1 [C]). (2) Take off the hard disk with the whole SYS board lower cover ( Chapter 2.5.2 [B]). (3) Disconnect 5 connectors. Fig. 2-545 (4) Remove 2 screws, release 1 lock support. Then take off the NIC board. NIC board Fig. 2-546 (5) Remove 10 screws, take off the SYS board. SYS board Fig. 2-547 e-STUDIO350/352/353/450/452/453 2 - 38 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 05/11...
Page 59 (2) Disconnect 4 connectors. Fig. 2-548 Note: Alternatively, you can take off the SYS board without removing the hard disk by removing 2 upper and 1 lower fixing screws for the hard disk bracket and 1 fixing screw for the ground wire to tilt down the hard disk toward you. Fig. 2-549 (3) Remove 8 screws and take off the SYS board. SYS board Fig. 2-550 [E] Switching power supply (1) Take off the left cover ( Chapter 2.5.1 [J]). (2) Remove 2 screws. Disconnect 2 connectors with lock on the front side and 1 connector while releasing the harness from the holder on the right side of the bracket. Fig. 2-551 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 39 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE 07/11...
Page 60 Note: When installing, pay attention to the direction of the wind from the fan. Fig. 2-553 [G] High-voltage transformer (1) Take off the rear cover ( Chapter 2.5.1 [C]). (2) Disconnect 7 connectors. (3) Remove 2 screws and release 2 locking supports. Then take off the high-voltage transformer. Note: When installing, make sure to match the colors of connectors and harnesses accord- ing to the color instruction on the board. Fig. 2-554 [H] Noise filter (1) Take off the rear cover and right lower cover Chapter 2.5.1 [C] [O]). (2) Disconnect 4 connectors. Remove 1 screw and 1 washer. Then take off the noise filter. White Black Fig. 2-555 e-STUDIO350/352/353/450/452/453 2 - 40 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 61: Options
2.6 Options [A] MR-3015 (Reversing Automatic Document Feeder (RADF)) (1) Turn OFF the power and unplug the power cable. (2) Take off the connector cover. Fig. 2-601 (3) Disconnect the connector. Fig. 2-602 (4) Remove 2 screws on the rear side. Fig. 2-603 (5) Open the RADF. Fig. 2-604 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 41 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 62 Fig. 2-605 (7) Slide the RADF backward and take off by lifting it up. Fig. 2-606 [B] KD-1011 (Paper Feed Pedestal (PFP)) (1) Turn OFF the power and unplug the power Connector of optional cable. damp heater (2) Take off the rear cover of the equipment. Chapter 2.5.1 [C]) Note: Disconnect the connector of the RADF first when the RADF is installed. (3) Remove 1 screw and the ground wire, and then disconnect 2 connectors (3 if the op- Fig. 2-607 tional damp heater is installed). (4) Remove 2 screws and take off 2 fixing brackets on the rear side. Fig. 2-608 e-STUDIO350/352/353/450/452/453 2 - 42 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 05/11...
Page 63 (5) Take off the lower drawer of the equipment and PFP upper drawer. Fig. 2-609 (6) Remove 4 screws and take off 2 fixing brackets on the front side. Fig. 2-610 (7) Lift up the equipment and take off the PFP. Fig. 2-611 KD-1012 (Large Capacity Feeder (LCF)) (1) Turn OFF the power and unplug the power cable. Connector of optional damp heater (2) Take off the rear cover of the equipment. Chapter 2.5.1 [C]) Note: Disconnect the connectors of the RADF first when the RADF is installed. (3) Remove 1 screw and the ground wire, and then disconnect 2 connectors (3 if the op- Fig. 2-612 tional damp heater is installed). © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 43 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE 05/11...
Page 64 (4) Remove 2 screws and take off 2 fixing brackets on the rear side. Fig. 2-613 (5) Take off the lower drawer of the equipment. Fig. 2-614 (6) Pull out the LCF drawer. Fig. 2-615 (7) Remove 4 screws and take off 2 fixing brackets on the front side. Fig. 2-616 e-STUDIO350/352/353/450/452/453 2 - 44 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 65 (8) Lift up the equipment and take off the LCF. Fig. 2-617 [D] MJ-1022 (Hanging finisher) (D-1) When PFP/LCF is not installed (1) Turn OFF the power and unplug the power cable. (2) Take off the connector cover and disconnect the connector. Fig. 2-618 (3) Remove 2 screws and take off the safety bracket on the rear side and the cover. Fig. 2-619 (4) Remove 2 screws and take off the safety bracket on the front side and the cover. Fig. 2-620 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 45 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 66 (5) Remove 2 screws. Fig. 2-621 (6) Lift up the finisher and take it off. Fig. 2-622 (D-2) When PFP/LCF is installed (1) Turn OFF the power and unplug the power cable. (2) Take off the connector cover and disconnect the connector. Fig. 2-623 (3) Remove 2 screws and take off the cover on the rear side. Fig. 2-624 e-STUDIO350/352/353/450/452/453 2 - 46 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 67 (4) Remove 2 screws and take off the cover on the front side. Fig. 2-625 (5) Remove 2 screws. Fig. 2-626 (6) Lift up the finisher and take it off. Fig. 2-627 [E] MJ-1023 (Console finisher) (1) Turn OFF the power and unplug the power cable. (2) Take off the connector cover and disconnect the connector. Fig. 2-628 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 47 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 68 (3) Remove 1 screw and take off the finisher lower cover. Fig. 2-629 (4) Remove 3 screws and take off the finisher front cover. Fig. 2-630 (5) Remove 1 screw. Fig. 2-631 (6) Remove 1 screw and take off the cover of the finisher rear side. Fig. 2-632 e-STUDIO350/352/353/450/452/453 2 - 48 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 69 (7) Remove 1 screw. Fig. 2-633 (8) Take off the finisher. Note: Be careful not to fell the finisher when mov- ing the finisher unit only. Fig. 2-634 [F] MJ-1024 (Console finisher) (1) Turn OFF the power and unplug the power cable. (2) Take off the connector cover and disconnect the connector. Fig. 2-635 (3) Open the finisher front cover and remove 1 screw. Fig. 2-636 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 49 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 70 (4) Remove 1 screw and take off the cover of the finisher rear side. Fig. 2-637 (5) Remove 1 screw. Fig. 2-638 (6) Take off the finisher. Note: Be careful not to fell the finisher when mov- ing the finisher unit only. Fig. 2-639 [G] MJ-6004 (Hole punch unit) (1) Turn OFF the power and unplug the power cable. (2) Take off the connector cover and disconnect connector. Fig. 2-640 e-STUDIO350/352/353/450/452/453 2 - 50 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 71 (3) Open the front cover of the hole punch unit and remove 1 screw. Fig. 2-641 (4) Take off the cover of the punch unit lower side. Fig. 2-642 (5) Remove 1 screw. Fig. 2-643 (6) Remove 3 screws and take off the punch unit rear cover. Fig. 2-644 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 51 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 72 (7) Remove 1 screw. Fig. 2-645 (8) Take off the finisher with the hole punch unit. Note: Be careful not to fell the finisher when mov- ing the finisher unit only. Fig. 2-646 (9) Disconnect 2 connectors. Fig. 2-647 (10) Remove 2 screws. Fig. 2-648 e-STUDIO350/352/353/450/452/453 2 - 52 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 73 (11) Lift up the punch unit and take it off. Fig. 2-649 [H] KN-3520 (Bridge unit) (1) Turn OFF the power and unplug the power cable. (2) Remove 2 screws and take off the cover. Fig. 2-650 (3) Disconnect 1 connector. Fig. 2-651 (4) Open the bridge unit. Remove 1 screw and take off the cover. Fig. 2-652 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 53 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 74 (5) Close the bridge unit and remove 1 screw. Fig. 2-653 (6) Remove 4 screws and take off the bracket. Fig. 2-654 (7) Lift up the bridge unit and release the hook. Take off the bridge unit toward the front. Fig. 2-655 MJ-5004 (Job separator) (1) Turn OFF the power and unplug the power cable. (2) Take off the tray. Fig. 2-656 e-STUDIO350/352/353/450/452/453 2 - 54 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 75 (3) Remove 2 screws and take off the cover. Fig. 2-657 (4) Disconnect 2 connectors. Fig. 2-658 (5) Loosen 2 screws and take off the cover. Fig. 2-659 (6) Remove 1 screw. (7) Lift up the job separator and release the hook. Take off the job separator toward the front. Fig. 2-660 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 55 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE...
Page 76 [J] MJ-5005 (Offset tray) (1) Turn OFF the power and unplug the power cable. (2) Take off the tray. Fig. 2-661 (3) Remove 2 screws and take off the cover. Fig. 2-662 (4) Disconnect 2 connectors. Fig. 2-663 (5) Remove 1 screw and take off the cover. Fig. 2-664 e-STUDIO350/352/353/450/452/453 2 - 56 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE...
Page 77 (6) Remove 1 screw. (7) Lift up the offset tray and release the hook. Take off the offset tray toward the front. Fig. 2-665 [K] MR-3018 (Reversing Automatic Document Feeder (RADF)) (1) Turn the power OFF and unplug the power cable. (2) Take off the connector cover. Fig. 2-666 (3) Disconnect the connector. Fig. 2-667 (4) Remove 1 screw and 1 washer on the rear side. Fig. 2-668 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 57 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE 05/11...
Page 78 (5) Remove 1 screw on the rear side. Fig. 2-669 (6) Open the RADF. Fig. 2-670 (7) Remove 2 screws on the front side. Fig. 2-671 (8) Slide the RADF backward and take it off by lifting it up. Fig. 2-672 e-STUDIO350/352/353/450/452/453 2 - 58 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 05/11...
Page 79 [L] MJ-1101 (Console finisher) (1) Turn the power OFF and unplug the power cable. (2) Take off the connector cover and disconnect 1 connector. Fig. 2-673 (3) Open the front cover of the finisher. Remove 1 screw and slide the lever to the front side. Fig. 2-674 (4) Take off the finisher. Note: When moving the finisher unit by itself, be careful that it does not topple over. Fig. 2-675 [M] MJ-6101(Hole punch unit) (1) Turn the power off and unplug the power cable. (2) Take off the connector cover and disconnect the connector. Fig. 2-676 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 59 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE 05/11...
Page 80 (3) Release the Latches and take off the front lower cover of the hole punch unit. Fig. 2-677 (4) Remove 1 screw and slide the lever to the front side. (5) Take off the finisher. Note: When moving the finisher unit by itself, be careful that it does not topple over. Fig. 2-678 (6) Remove 1 screw and take off the mainte- nance cover. Fig. 2-679 (7) Disconnect 1 connector. Fig. 2-680 e-STUDIO350/352/353/450/452/453 2 - 60 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved OUTLINE OF THE MACHINE 05/11...
Page 81 (8) Remove 2 screws. (9) Take off the hole punch unit. Fig. 2-681 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 - 61 e-STUDIO350/352/353/450/452/453 OUTLINE OF THE MACHINE 05/11...
Page 83: Copy Process
(2) Original exposure: Converts images on the on the photoconductive drum onto paper. original into optical signals.  (8) Separation: Separates paper with the toner  (3) Data reading: The optical signals are con- image from the photoconductive drum. verted into electrical signals.  (9) Fusing: Fuses the toner image onto the pa-  (4) Data writing: The electrical signals are per by applying heat and pressure. converted into light signal (laser emission)  which exposes the surface of the photocon- (10) Cleaning : Scrapes off the residual toner ductive drum. from the drum.   (5) Development: Negatively-charged toner (11) Discharging : Eliminates the residual nega- adheres to the photoconductive drum and tive charge from the surface of the forms visible image. photoconductive drum.  © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 3 - 1 e-STUDIO350/352/353/450/452/453 COPY PROCESS...
Page 84: Details Of Copying Process
Charging – 000 process process data writing, discharging described later, negative potential of the areas on the drum Electric potential of the photoconductive drum corresponding to black areas of the original Fig. 3-202 are eliminated, while the areas on the drum corresponding to white areas retains the negative charge. As this image on the drum formed by the negative potential is not visible, it is called an “electrostatic latent image.”(2) Charging Main charger Charging is the process to apply charge evenly on the drum surface. The charger wire produces negative corona discharge is controlled by the grid, allowing the drum surface to be evenly charged with the Drum rotation negative potential. The surface potential on the drum is determined by the grid potential and is controlled to a certain value by the grid control circuit. High-voltage Grid control circuit transformer Fig. 3-203 e-STUDIO350/352/353/450/452/453 3 - 2 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved COPY PROCESS 04/01...
Page 85 (Example) CCD light Value of image receiving signals to be out- amount Light Difference between "light " and "dark" is divided into 256 steps. Dark Fig. 3-205 (4) Data writing Data writing is the process of converting the Image image signals sent from the image process- processing LDR board ing section into optical signal and exposing section the drum surface with the light. Semiconductive laser element converts image signals transmitted from the image Polygonal mirror processing section into optical signal (laser Semiconductive emission) to expose the drum surface and laser element form an electrostatic latent image on it. Photo- conductive drum Fig. 3-206 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 3 - 3 e-STUDIO350/352/353/450/452/453 COPY PROCESS...
Page 86 Photoconduc- tive drum White background Halftone Solid Photoconductive layer Aluminum base Fig. 3-208 White background Image not developed – 00V 750V The (–) potential of the photoconductive drum Bias poten- is higher than the devel- – 400V 550V tial oper bias. Image developed by toner – 300V The (–) potential of the photoconductive drum – 200V is lower than the devel- oper bias. – 00V Fig. 3-209 e-STUDIO350/352/353/450/452/453 3 - 4 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved COPY PROCESS...
Page 87 Symptom : 1. I mage density is lowered. 2. T oner scattering occurs. No frictional electrification occurs on 3. B ackground fogging occurs. the area where the toner is caked. Solution : Replace the developer material. Fig. 3-211 • Magnetic roller - Magnetic brush development - Photoconductive The south and north poles are arranged inside drum the magnetic roller as shown in the right figure. The developer material forms a brush-like fluff which contacts the photoconductive drum sur- Magnetic force face. line  Magnetic roller This is caused by the magnetic force lines be- tween the south and north poles. Fig. 3-212 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 3 - 5 e-STUDIO350/352/353/450/452/453 COPY PROCESS 04/01...
Page 88 Additional Explanation The life of the toner cartridge (number of output pages) varies depending on the following conditions. Coverage of originals (printing image ratio of the original size) and density of original background Size and density of originals The existence of solid black when making prints (when a book is copied and the original cover is partially opened) Temperature and humidity in the room when making prints. Prints density and image quality mode As indicated in the figure below, the life of the toner cartridge varies depending on the copy mode and coverage of originals. A full block in the figure below denotes approx. 10,000 output pages. Type of originals Block Fig. 3-213 e-STUDIO350/352/353/450/452/453 3 - 6 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved COPY PROCESS...
Page 89 (137 µA DC) is applied to the part 10 mm from the trailing edge. Toner (7) Separation Separation is the process of separating paper Fig. 3-215 which is temporarily adhering to the drum due to the static electricity during the transfer process. Method : Apply AC voltage to which the nega- tive DC bias is added to the separation Suction fan charger. (Sub-separation fan)  The positive charge on the paper is decreased. Absorbing  Drum rotation The static electricity (adherence power) between the paper and drum becomes weak. Separation charger  Direction of trans- The paper is separated from the drum portation by its own stiffness and absorption by the fan. Fig. 3-216 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 3 - 7 e-STUDIO350/352/353/450/452/453 COPY PROCESS 04/01...
Page 90 Fusing is the process of melting the toner on the paper and fixing it firmly on the paper. Pressure Method : The melting point of the toner (main ingredient: resin) is 100-110°C. Fuser roller  (Heat) Toner is melted by the heat of the surface of the fuser roller. Paper (Pressure) The pressure roller is pressed Fig. 3-218 against the fuser roller by the springs to increase the adherence of the melted toner onto the paper. Separation finger Separation finger  Heat and pressure are applied to Fuser roller the paper when it passes between the fuser roller and pressure roller. (Pressure) (Fusing) The toner is fused on the paper. IH coil Pressure roller Paper movement Fig. 3-219 e-STUDIO350/352/353/450/452/453 3 - 8 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved COPY PROCESS 04/01...
Page 91 (10) Discharging Discharging is the process of eliminating the negative charge remaining on the photocon- ductive drum before the next charging pro- cess. Discharge LED If the residual charge is not eliminated, the fol- lowing phenomenon occurs: Photoconductive The negative charge remains on the photo drum conductive drum.  Uneven charge is applied to the drum during the next printing.  Ground The next print will have a double image. Fig. 3-221 (The preceding image appears.) Solution : The entire surface of the photoconductive drum is illuminated with light by the discharge LED array.  The photoconductive drum becomes electri- cally conductive.  All of the negative charge remaining on the photoconductive drum is conducted to the ground.  Preparation for the next printing is completed. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 3 - 9 e-STUDIO350/352/353/450/452/453 COPY PROCESS 04/01...
Page 92: Comparison With Dp4500/3500
Exposure after cleaning ← (2) Discharge LED Red LED ← 8. Cleaning (1) Method Cleaning blade ← (2) Recovered toner Not reusable ← 9. Fusing (1) Method Long-life fuser roller method ← Fuser roller: ← Coated with fluoroplastic (ø40) Thin roller coated with fluoroplastic (ø40) Pressure roller: ← PFA tube roller (ø30) ← (2) Cleaning Cleaning roller for pressure roller ← (ø14) ← (3) Heater IH coil (Induction-heating method) ← Turned ON/OFF by thermistor ← e-STUDIO350/352/353/450/452/453 3 - 10 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved COPY PROCESS 07/11...
Page 93: General Operation
(1) Initialization • Power ON • IH coil ON • Set number “1” reproduction ratio “100%” and “WAIT WARMING UP” are displayed • Fan motors ON • Initialization of scanning system – The carriage moves to the home position. – The carriage moves to the peak detection position. – The exposure lamp is turned ON. – Peak detection (white color is detected by the shading correction plate) – The exposure lamp is turned OFF. • “READY (WARMING UP)” is displayed (2) Pre-running operation The pre-running operation is started when the temperature of the fuser roller surface reaches a certain temperature. • Fuser roller rotated • Drum rotated – The main motor is turned ON. • Initialization of feeding system – Each drawer tray goes up. • Pre-running operation stops after five seconds. (3) When the surface temperature of the fuser roller becomes sufficient for fusing, • “READY” is displayed. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - 1 e-STUDIO350/352/353/450/452/453 GENERAL OPERATION...
Page 94: Ready State (Ready For Copying)
• Main charger, developer bias and discharge LED ON • Fans are rotated in high speed • Drawer feed clutch ON – The pickup roller, feed roller, separation roller and transport roller start to rotate. • Paper reaches the upper drawer feed sensor – The upper drawer feed sensor is turned ON. • Paper reaches the registration roller. – The registration sensor is turned ON and aligning is performed. • Drawer feed clutch OFF after a certain period of time (3) After the carriage operation: • Registration clutch ON after a certain period of time → paper is transported to the transfer area. • Copy counter operates (4) After the registration clutch is turned ON: • Transfer charger ON after a certain period of time (5) Completion of scanning • Scan motor OFF • Exposure lamp OFF • Registration clutch OFF (after the trailing edge of the paper passed the registration roller) • “READY (PRINTING)” is displayed e-STUDIO350/352/353/450/452/453 4 - 2 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved GENERAL OPERATION...
Page 95 (6) Paper exit • Exit sensor detects the trailing edge of the paper • Main charger, developer bias and discharge LED OFF • Polygonal motor, main motor and exit motor OFF • Drum, fuser unit and developer unit stop • Fans return to the ready rotation • “READY” is displayed and the equipment enters the ready mode © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - 3 e-STUDIO350/352/353/450/452/453 GENERAL OPERATION...
Page 97: Bypass Feed Copying
– The drum, fuser unit, developer unit and exit roller are driven. (3) Bypass feeding • Main charger, developer bias and discharge LED ON • Fans are rotated in high speed • Bypass feed clutch ON – The bypass pickup roller and bypass feed roller start to rotate. – The bypass pickup roller is lowered. • Aligning operation • Paper reaches the registration roller • After a certain period of time, the bypass feed clutch OFF (4) Hereafter, the operation (3) through (6) of “4.2.3. Drawer feed copying” is repeated. 4.2.5 Interruption copying (1) Press the [INTERRUPT] button • LED “INTERRUPT” ON • Copying operation in progress is temporarily stopped • Carriages -1 and -2 return to appropriate positions • “Job interrupted job 1saved” is displayed. • Automatic density and reproduction ratio 100% are set (The set number remains the same) (2) Select the desired copy condition © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - 5 e-STUDIO350/352/353/450/452/453 GENERAL OPERATION...
Page 98: Detection Of Abnormality
(3) After the interruption copying is finished: • LED “INTERRUPT” OFF by pressing the [INTERRUPT] button • Equipment returns to the status before the interruption • “Ready to resume job 1” is displayed (4) Press the [START] button The copying operation before the interruption is resumed. 4.3 Detection of Abnormality When something abnormal has occurred in the equipment, the symbols corresponding to the type of abnormality are displayed. 4.3.1 Types of abnormality A) Abnormality cleared without turning OFF the door switch (1) Add paper (2) Paper misfeed in bypass B) Abnormality not cleared without turning OFF the door switch (1) Misfeed in equipment (2) Add toner (3) Developer unit not installed properly (4) Toner bag replacement C) Abnormality not cleared without turning OFF the main switch (1) Call for service e-STUDIO350/352/353/450/452/453 4 - 6 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved GENERAL OPERATION...
Page 99: Description Of Abnormality
4.3.2 Description of abnormality A-1) Add paper Drawer empty sensor detects the presence or absence of paper. [When drawer is not installed] No drawer detected ↓ Tray not going up (drawer empty sensor OFF) ↓ “Add paper” displayed ↓ [START] button disabled [When drawer is installed] Drawer detected ↓ Tray going up (drawer empty sensor OFF) ↓ “Add paper” displayed ↓ [START] button disabled © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - 7 e-STUDIO350/352/353/450/452/453 GENERAL OPERATION...
Page 100 At this time, the tray-up sensor and LCF empty sensor are OFF. → When the tray-up sensor is not turned ON in a fixed period of time, it means that the tray is in abnormal condition. → “Add paper” is displayed regardless of presence/absence of paper. ↑ ↓ Cleared by turning the power ON / OFF → Tray-up sensor is turned ON in a fixed period of time. – The tray motor stops. At this time, if the empty sensor is ON: It is judged that there is paper. OFF: It is judged that there is no paper. ↓ Drawer area of the illustration blinks (When the drawer is selected) • When the paper in the drawer runs out during copying, → The tray-up sensor turned OFF → The tray-up motor turned ON Tray goes up → The tray-up sensor turned ON Tray-up motor stopped. → • Empty sensor turned OFF during the copying in spite of the tray-up sensor is ON It is judged that there is no paper. ↓ Drawer area of the illustration blinks (When the drawer is selected) ↓ The copying operation is stopped. e-STUDIO350/352/353/450/452/453 4 - 8 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved GENERAL OPERATION...
Page 101 A-3) Set key copy counter • When the key copy counter (optional) is pulled out from the equipment which installs it: “Set key copy counter” displayed →  ↓  Copying operation disabled    • When the counter is pulled out during copying:  Copying is stopped when the key copy counter is pulled out. B-1) Misfeed in equipment ( • Exit sensor detects jamming of the leading edge of paper. ↓ Registration clutch ON ↓ Less than 1.056 sec. Exit sensor ON Registration clutch If the exit sensor is not turned ON after 1.056 seconds, Exit sensor ↓ Paper jam (E010) → The copying operation is stopped. Timer .05sec. Paper jam (E010) Fig. 4-301 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - 9 e-STUDIO350/352/353/450/452/453 GENERAL OPERATION...
Page 102 1.116 seconds, ↓ Timer Paper jam (E020) → The copying operation is stopped. .sec. • Immediately after the power ON Paper jam (E020) Fig. 4-302 ↓ Any of all sensors on paper transport path detects paper (ON) ↓ Paper jam (E030) • Front cover is opened during copying ↓ Paper jam (E410) • Registration sensor detects jamming of the leading edge of paper: ↓ Registration sensor is not turned ON in a fixed period of time after the leading edge of paper passed the transport roller. ↓ Paper jam (E120, E200, E210, E300, E330 and E3C0) • During paper feeding from ADU: Registration sensor is not turned ON in a fixed period of time after the ADU clutch is turned ↓ Paper jam (E110) • During paper transporting from ADU: ADU entrance/exit sensors do not detect the paper at the fixed timing ↓ Paper jam (E510 or E520) e-STUDIO350/352/353/450/452/453 4 - 10 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved GENERAL OPERATION 04/01...
Page 103 Control circuit “Add toner” displayed: the copying operation disabled Solution: Open the front cover and replace the toner cartridge with a new one. → Toner is supplied copying operation enabled. B-3) Developer unit not installed properly Disconnection of the connectors of the developer unit ↓ “Developer unit not installed” is displayed. Solution: Connect the connectors of the developer unit and close the front cover. B-4) Dispose of used toner ( • Toner bag becomes full of toner ↓ Toner recovery auger shifts to the rear side: Toner bag full detection sensor (1) ON or Toner bag detection sensor (2) ON ↓ “Dispose of used toner” is displayed. • Toner bag full detection sensor ON during printing ↓ Printing is stopped after the paper being printed is exited. Solution: Replace the toner bag with a new one and close the front cover. C-1) Call for service Error code is displayed instead of the set number by pressing the [CLEAR] button and [8] button simultaneously when the “Call for service” is blinking. Refer to the error code table in the Service Handbook. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - 11 e-STUDIO350/352/353/450/452/453 GENERAL OPERATION...
Page 104: Flow Chart
Scan motor ON Ext sensor Home poston 2.5 seconds elapsed? detected? Call for servce entrance/ext sensors Peak detected? “C270” “C20” Call for servce “C20” Upper drawer feed sensor ON? Lower drawer feed sensor ON? Paper jam e-STUDIO350/352/353/450/452/453 4 - 12 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved GENERAL OPERATION...
Page 105 n abnormal broken? Tray-up motor ON condton? Call for servce Call for servce Call for servce Call for servce Fuser roller reached ready temp.? “C40” “C440” “CA0” “C470” “C430” “C40” “C40” Man motor OFF READY © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - 13 e-STUDIO350/352/353/450/452/453 GENERAL OPERATION...
Page 106: Automatic Paper Feed Copying
H-Sync Carrages move backward Call for servce “CA20” Remanng set Carrages stopped number=0? Remanng set Scannng system number=0? control completed Ext sensor detected leadng Laser OFF edge of paper? Paper jam Processng system “E00” control completed e-STUDIO350/352/353/450/452/453 4 - 14 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved GENERAL OPERATION...
Page 107 Ext sensor Paper jam detected tralng edge of paper? “E020” Polygonal motor OFF Man charger OFF Dscharge LED OFF Developer bas OFF Ext motor OFF Drum rotaton reversed Man motor OFF READY © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - 15 e-STUDIO350/352/353/450/452/453 GENERAL OPERATION...
Page 109: Control Panel
5.1 Control Panel and Display Panel The control panel consists of button switches and touch-panel switches to operate equipment and select various modes, and LEDs and an LCD to display the state of the equipment or the messages. When the operator’s attention is required, graphic symbols appear with messages explaining the condition of the equipment in the LCD panel. This equipment has a movable control panel which enables to adjust its angle to the operator. It also has improved its operatability and visibility with the enlarged LCD panel. [Control Panel Outside View] Fig. 5-101 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 5 - 1 e-STUDIO350/352/353/450/452/453 CONTROL PANEL...
Page 110: Items Shown On The Display Panel
5.2 Items Shown on the Display Panel Fig. 5-201 Fig. 5-202 e-STUDIO350/352/353/450/452/453 5 - 2 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved CONTROL PANEL...
Page 111: Display
(CHECK STAPLER) - Scanning is enabled 15 READY Stapling jam occurred in finisher (CHECK STAPLER) 16 READY No staples in saddle stitcher Cleared by supplying staples (CHECK SADDLE - Scanning is enabled STITCH STAPLER) 17 READY No paper in drawer Cleared by supplying papers (ADD PAPER) - Scanning is enabled Press JOB STATUS button 18 READY Finisher is full of paper Resumes printing by removing paper (FINISHER FULL) - Scanning is enabled from the finisher 19 READY Punching dust box is full Resumes printing by removing (HOLE PUNCH - Scanning is enabled punching dust from the dust box DUST BIN IS FULL) © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 5 - 3 e-STUDIO350/352/353/450/452/453 CONTROL PANEL...
Page 112 34 Cannot use this Displayed when the paper size which is not media type specified for the functions such as stapling or hole punching is set 35 Copy size: A4/LT Displayed when the paper size which is not only specified for “Book-type duplex copying” or “Dual-page” is set 36 Copy size: A4/LT and Displayed when the paper size which is not A4-R/LT-R specified for “Rotate Sort” 37 CHANGE DRAWER Displayed when the selected paper size is TO CORRECT not in the drawer PAPER SIZE 38 Change drawer to Displayed when the selected media type is correct media type not in the drawer 39 Select a paper size Displayed when paper size needs to be for bypass feeding specified for bypass feeding such as duplex copying e-STUDIO350/352/353/450/452/453 5 - 4 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved CONTROL PANEL...
Page 113 50 CANNOT PUNCH Displayed when the selected paper size is THIS SIZE PAPER not specified for hole punching 51 Remove paper from Displayed when the paper sizes are mixed the finisher at Staple Sorting Mode 52 Cannot staple this Displayed when the paper size is not size specified for stapling at Staple Sorting Mode 53 Remove paper from Finisher is full of papers the saddle stitch unit 54 Examine stapler Trouble in the stapler unit in finisher 55 Check staple No stapler in finisher section cartridge 56 Check staple cartridge No stapler in saddle stitch unit in the saddle stitch unit 57 Job interrupted job 1 Interrupt copying is accepted saved 58 Ready to resume job Interrupt copying is cancelled (finished) © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 5 - 5 e-STUDIO350/352/353/450/452/453 CONTROL PANEL...
Page 114 Will you save stored originals? 70 Install new toner No toner in the cartridge Displayed when toner is running out. cartridge Copying not enabled 71 Time for periodic PM cycle Maintenance and inspection are maintenance - Displayed at the time for maintenance performed by qualified service - Copying is available technician. 72 READY Displays when the printing is stopped (CHANGE DRAWER because of media type mismatch TO CORRECT MEDIA TYPE) 73 PRESS [BASIC] Displays the warning that the copy is not and select normal enabled when any drawer but bypass feed paper size is selected at Cover Sheet Mode or Sheet Insertion Mode. e-STUDIO350/352/353/450/452/453 5 - 6 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved CONTROL PANEL 04/01...
Page 115 Message State of equipment Note 74 Misfeed in copier Paper jam in the equipment Remove the paper in the equipment - Displayed when paper jam occurred in the according to the messages displayed equipment on the panel. 75 Call for service Displayed when motor, sensor, switch, etc. Turn OFF the power and solve the do not work properly problem, then turn ON the power. 76 Please try again after Displayed when the Department Code can Leave it for a while and key in the a while no be keyed in immediately after power-ON. code again. 77 Set standard size Displayed when the paper size which is not Reset the paper size. acceptable is set (depends on the setting) © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 5 - 7 e-STUDIO350/352/353/450/452/453 CONTROL PANEL...
Page 116: Relation Between The Equipment State And Operator's Operation
5.3 Relation between the Equipment State and Operator’s Operation e-STUDIO350/352/353/450/452/453 5 - 8 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved CONTROL PANEL...
Page 117: Description Of Operation
5.4 Description of Operation 5.4.1 Dot matrix LCD circuit (1) Structure (40 x 240) Fig. 5-401 The LCD panel is an STN blue mode transmissive type LCD with 640x240-dot display capacity. It con- sists of a driver LSI, frame, printed circuit board, and lateral type CCFL backlight. * STN: Super Twisted Nematic * CCFL: C old Cathode Fluorescent Lamp (2) Block diagram XSCL LCDEN LCD PANEL 40 x 240 DOTS Power supply Fig. 5-402 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 5 - 9 e-STUDIO350/352/353/450/452/453 CONTROL PANEL 05/11...
Page 118 640 x 240 dots Analog Touch panel input Decoder Serial data Panel processing Hard-key matrix LED driver Buzzer e-STUDIO352/353/452/453 LED scan signal LED serial output LED driver Buzzer ON signal Buzzer e-STUDIO350/450 Fig. 5-403 e-STUDIO350/352/353/450/452/453 5 - 10 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved CONTROL PANEL 07/11...
Page 119: Led Display Circuit
/tF /tF FRAME LOAD FRAME LOAD CP x(40/4) pulses D0-D3 Fig. 5-404 5.4.2 LED display circuit (1) Method of LED display ex) Displaying “COPY” . Current "L" 17 LDON0 "L" (COPY) Fig. 5-405 Transistor is turned ON when the LDON 0 signal becomes “L” level. Also, when IC pin changes to “L”, the current flows from 5VL via the transistor to the LED (“COPY”) to turn ON the LED (“COPY”). Conditions to turn ON the LED (a) The transistor (Q3) connected to the LED anode is ON. (b) The output from the cathode side of the LED is “L” level. The LED turns ON when the conditions (a) and (b) are met. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 5 - 11 e-STUDIO350/352/353/450/452/453 CONTROL PANEL...
Page 120: Disassembly And Replacement
5.5 Disassembly and Replacement Note: When taking off the control panel, check the position of the stopper; if the stopper is at the position “b”, remove the stopper or move it to the position “a”. Fig. 5-501 [A] Stopper (1) Slide the stopper and pull it out. Stopper Fig. 5-502 [B] Control panel unit (1) Take off the right upper cover and the front upper cover. ( Chapter 2.5.1 [I] [J]) (2) Disconnect 1 connector. (3) Release the harness from 3 harness clamps. Fig. 5-503 (4) Lower the control panel and remove 4 screws. (5) Take off the control panel unit while sliding Fig. 5-504 e-STUDIO350/352/353/450/452/453 5 - 12 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved CONTROL PANEL 07/06...
Page 121 (6) Remove 3 screws and take off the cover. Cover Fig. 5-505 (7) Remove 5 screws and take off the hinge Hinge bracket bracket. Fig. 5-506 (8) Disconnect 5 connectors. (9) Release the harness from 2 harness clamps. DSP board (10) Remove 1 screw and take off the DSP board. Fig. 5-507 (11) Remove 4 screws and take off the LCD. Fig. 5-508 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 5 - 13 e-STUDIO350/352/353/450/452/453 CONTROL PANEL 05/11...
Page 123: Scanner
SCANNER 6.1 Function In the scanning section of this equipment, the surface of an original is irradiated with a direct light and the reflected light is led through mirrors, a lens and a slit to CCD where optical-to-electrical conversion is performed, converting the optical image data into an electrical (analog) signal. This analog signal is changed to a digital signal, which then undertakes various corrective processes necessary for image formation. After that, arithmetic operation is performed on the digital signal, which is then transmitted to the data writing section. Reflector Lens Original glass Exposure lamp Drive pulley Rail for carriage-2 Rail for carriage-1 Carriage-2 SLG board Carriage-1 CCD board Fig. 6-101 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 6 - 1 e-STUDIO350/352/353/450/452/453 SCANNER...
Page 124: Construction
The following shows the construction and purpose of the scanning system: (1) Original glass This is a glass on which original is placed. The light from the exposure lamp is irradiated to the original through this glass. (2) Carriage-1 Carriage-1 consists of the exposure lamp, lamp inverters, reflector, mirror-1, etc. It is driven by the scan motor and scans an original on the glass. Reflector Lamp inverter Exposure lamp Mirror-1 Fig. 6-201 a. Exposure lamp This lamp is the light source to irradiate the original on the glass. (One 16W xenon lamp) b. Lamp inverter Controls lighting of the xenon lamp. c. Reflector This is a plate to efficiently direct the light from the exposure lamp to the surface of the original on the glass. d. Mirror-1 This mirror directs the light reflected from the original to the mirror-2 described later. Original Original glass Exposure lamp Lamp inverter Reflector Mirror-1 Fig. 6-202 e-STUDIO350/352/353/450/452/453 6 - 2 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved SCANNER...
Page 125 (3) Carriage-2 Carriage-2 mainly consists of the mirror-2, mirror-3, etc. and directs the reflected light from the mirror-1 through the mirrors-2 and -3 to the lens. This carriage is driven by the same scan motor as that for the carriage-1 at half the scanning speed of the carriage-1 (The scanning distance is also half that of the carriage-1). Mirror-2 Mirror-3 Fig. 6-203 (4) Lens unit The light reflected from the mirror-3 is led to the CCD placed at the focal point of the lens which is fixed in a position. (5) CCD driving board (CCD board) This is a board to convert the optical image signal which has been converted by the CCD into an analog signal. Lens unit CCD driving board Fig. 6-204 (6) Automatic original detection sensor The size of an original placed on the glass is instantly detected using the automatic original de- tection sensors (APS sensor) fixed on the base frame without moving the carriage-1. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 6 - 3 e-STUDIO350/352/353/450/452/453 SCANNER...
Page 126: Description Of Operation
6.3 Description of Operation 6.3.1 Scan motor Carriage-1 Scan motor Wire pulley Motor speed-reduction pulley Carriage-2 Motor pulley Idler pulley Fig. 6-301 (a) Scanning of an original placed on the original glass This motor drives the carriages-1 and -2 through the timing belt and carriage wire. First, the scan motor drives the carriages-1 and -2 to their respective home position. The home position is detected when the carriage-1 passes the home position sensor. When the [START] button is pressed, the both carriages start to move and scan the original on the glass. (b) Scanning of an original placed on the RADF The carriage-1 stays at the shading position during shading correction, and at the scanning position during scanning operation. e-STUDIO350/352/353/450/452/453 6 - 4 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved SCANNER...
Page 127: Scanning Drive Circuit
Exctaton mode settng ( 3 ) MOTMD3 Scanner Exctaton mode settng ( 2 ) MOTMD2 Exctaton mode settng ( ) MOTMD MOTDIR Rotaton drecton settng Cut off output MOTEN MOTRST Reset RESET RESET IC SLG board Fig. 6-302 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 6 - 5 e-STUDIO350/352/353/450/452/453 SCANNER 05/11...
Page 128 MOTDIR Input “H”…Counterclockwise direction (as seen from the output shaft) of motor rotation Note: When the MOTMD3 is “L”, do not change the rotation direc- tion within 6.25µs before the first pulse of the MOTCLK becomes ON and after the last pulse becomes OFF. Cut OFF the drive Excitation drive is forcibly turned ON/OFF. output MOTEN Input “H”…Normal operation (Excited) “L”..Excitation drive is forcibly shut OFF (Not excited) Voltage to set value MOTREF Input Motor wire current value is set in the range of 0 to 1.7 (A)/phase for the motor current by applying the analog voltage 0 to 5 (V). Set the Set the excitation mode. exicitation mode MOTMD1 to 3 Input Note:Do not change the setting within 5µs after the first pulse of (1) to (3) the MOTCLK becomes ON and the last pulse becomes OFF. Reset for the whole system Internal circuit of the driver is initialized by setting the motor to “L” Reset MOTRST Input level (pulse interval: 10µs or more). The motor drive circuit is automatically reset when the power is turned ON. e-STUDIO350/352/353/450/452/453 6 - 6 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved SCANNER...
Page 129: Initialization At Power-On
6.3.3 Initialization at power-ON The carriage moves to its home position and performs the peak detection. Then it moves to the carriage waiting position and waits. Power-ON Carriage home position sensor Scan motor rotating Scan motor rotating (Moves to the forward (Moves to backward direction of carriage) direction of carriage) Carriage home Carriage home Error handling position sensor position sensor Carriage home position Deceleration -> Stop data set Deceleration -> Stop Moving peak detection position Peak detection Completion of initialization Moving to carriage waiting position Scanning command Fig. 6-303 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 6 - 7 e-STUDIO350/352/353/450/452/453 SCANNER...
Page 130: Control Of Exposure Lamp
Control crcut for the exposure lamp conssts of the followng three blocks: (1) Lighting device for the xenon lamp (Inverter) Turns ON/OFF the exposure lamp. (2) CCD circuit This circuit converts the reflected light amount from the original surface and the shading correc- tion plate to electrical signals. The exposure amount is controlled in two ways: (a) White reference formation - reads the reflected light amount from the white shading correction plate (b) Black reference formation - reads the light amount at the regulation position with the expo- sure lamp lights OFF (3) Image processing circuit A series of image processes such as a gamma correction and a shading correction are applied on the output signal from the CCD. The signal is then digitized and output from this circuit. Shading correction plate Original Exposure lamp (xenon lamp) Lighting device for xenon lamp (Inverter) PWA-CCD PWA-SLG Scanner Image processing circuit Fig. 6-401 e-STUDIO350/352/353/450/452/453 6 - 8 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved SCANNER...
Page 131: Exposure Lamp
6.4.2 Exposure lamp External electrode type xenon fluorescent lamp is used as an exposure lamp in this equipment. (1) Structure Fluorescer is applied on the inside surface of the lamp pipe (except a part to be an opening) which is filled with the xenon gas. A pair of the external electrodes covered by the film with the adhesive agent is attached over the pipe. PET film Aluminum tape electrode Glass valve Fluorescer Adhesive agent, PET, film Xenon gas Fig. 6-402 (2) Behavior inside the lamp The electron inside the pipe is led to the electric field by applying voltage to the pair of the exter- nal electrodes, and discharge is started. Electrons then flow and clash with the xenon atom inside the pipe to excite them, and generate the ultraviolet ray. This ultraviolet ray converts the fluoresc- er into the visible light. (1)Electrode (2)Electron (3)Xenon atom (4)Ultraviolet ray (5)Fluorescer (6)Visible light (irradiated from the opening to outside the pipe) (7)Opening (8)Harness Fig. 6-403 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 6 - 9 e-STUDIO350/352/353/450/452/453 SCANNER...
Page 132: Control Circuit For The Exposure Lamp
6.4.3 Control circuit for the exposure lamp SLG board +5VSW +24V HIGH LMPON LAMP-EXPO Xenon lamp WDTOUT INV-EXPO-360 IC21 5VSWON IC34 Scanner CPU Fig. 6-404 Working conditions LMPON Exposure lamp ON signal Lamp turns ON at “L” 5VSW ON 5V SW ON signal Controls 5VSW by CPU. Normally “L” WDTOUT Watchdog timer signal “L” is output when CPU is out of control Xenon lamp e-STUDIO350/352/353/450/452/453 6 - 10 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved SCANNER 05/11...
Page 133: General Description Of Ccd Control
Detals of lght recevng Transfer secton Shft regster Transfer clock Fig. 6-501 6.5.2 Shading correction Signal voltages read by the CCD have the following characteristics: (1) Light source has a variation in its light distribution. (2) Since the light beam reflected from the original is converged using a lens, the light path is the shortest at the center of the CCD and the longest at ends. This causes difference in the amount of light reaching the CCD (i.e. the light amount is maximum at the CCD center, gradu- ally decreases toward ends). (3) Each of the 7,400 elements varies in opto-electronic conversion efficiency. These variation need to be corrected and this correction is referred to as shading correction. Shading correction is performed by applying normalization process using the following formula on the black and white data obtained in advance to correct lighting variance and element variation of the image data. I = k x (S — K) (W — K) k : Coefficient S : Image data before correction K : Black data (stored in “black” memory) W : White data (stored in “white” memory) © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 6 - 11 e-STUDIO350/352/353/450/452/453 SCANNER...
Page 134: Automatic Original Size Detection Circuit
6.6.2 Process of detection of original size (1) When the equipment is in the original size detection mode, carriage-1 is set at its home position. (2) When the platen cover is opened, the sensors receive the light reflected from the original and if one of the matrix conditions shown in (4) for original sizes are met, the size of the original is instantly detected. (3) The output signal from each sensor is input to CPU on the SLG board to determine the size of the original. [LT Series] [A4 Series] APS-R APS-R APS-C APS-C Reflection type Reflection type photo- APS-3 photosensor sensor APS-3 APS-2 APS- APS-2 PWA-SLG PWA-SLG Fig. 6-602 Original size detection circuit e-STUDIO350/352/353/450/452/453 6 - 12 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved SCANNER...
Page 135 [A4 Series] APS-R APS-C A5–R B5–R A4–R APS-3 APS- APS-2 [LT Series] APS-R APS-C ST–R APS-3 LT–R APS-2 Fig. 6-603 Sensor detection points © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 6 - 13 e-STUDIO350/352/353/450/452/453 SCANNER...
Page 136 A5-R [LT Series] Size judgement APS-C APS-R APS-2 APS-3 LT-R ST-R Code Output signal Original Not available Available * When the platen sensor is OFF, • The followings are determined by output signals from the APS sensors. Size (The combination of the signals satisfy any in the above chart) : Size is displayed on the control panel and a specific paper or reproduction ratio is selected. Size retention (The combination of the signals do not satisfy the above chart) : The latest original size recognized (or no original state) until new paper size is recognized. No original (Output from all the sensors are “H”.) : Reproduction ratio and paper are not selected. • Size change is always observed and detected. • The carriage-1 stays at the standby position even if the reproduction ratio changes corresponding to the change of the original size. * When the platen sensor is ON, The latest original size (or no original state) recognized right before the platen sensor is turned ON is re- tained regardless of the status the APS sensor output signals. e-STUDIO350/352/353/450/452/453 6 - 14 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved SCANNER...
Page 137 About reflection type photosensor The reflection type photosensor is comprised of an infrared light emitting diode and a phototran- sistor. It uses pulse modulation to detect an original. Original 8µsec 130µsec Phototransistor Fig. 6-604 The light emitting diode is driven by a pulse having a 130 µsec cycle and an 8 µsec ON time. When the phototransistor receives the same signal as this pulse, it is determined that there is an original. The pulse modulation is performed inside the reflection type phototransistor. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 6 - 15 e-STUDIO350/352/353/450/452/453 SCANNER...
Page 138: Disassembly And Replacement
Fig. 6-702 [B] Lens cover (1) Take off the original glass ( Chapter 6.7 [A]). (2) Remove 6 screws and take off the lens cover. Fig. 6-703 [C] Automatic original detection sensor (APS sensor) (C-1) A4 series (1) Take off the lens cover ( Chapter 6.7 [B]). (2) Disconnect 1 connector from the SLG board. (3) Release the harnesses from 6 harness clamps. (4) Remove 1 screw each and take off the APS sensors (5 pcs.). Fig. 6-704A e-STUDIO350/352/353/450/452/453 6 - 16 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved SCANNER...
Page 139 Fig. 6-704L [D] Exposure lamp (1) Take off the original glass ( Chapter 6.7 [A]). (2) Take off the front upper cover ( Chapter 2.5.1 [E]). (3) Move the carriage-1 to the center position where the side of the frame is cut out. Fig. 6-705 (4) Disconnect 1 connector from the INV board. (5) Release the harness from 1 harness clamp and pull out the harness from the frame of the carriage. Note: When disconnecting the connector, make sure not to overload the carriage frame. Fig. 6-706 (6) Move the carriage-1 to the position where the exposure lamp is seen through the cut- out of the frame. Fig. 6-707 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 6 - 17 e-STUDIO350/352/353/450/452/453 SCANNER...
Page 140 Fig. 6-708 [E] Lens unit (1) Take off the lens cover ( Chapter 6.7 [B]). (2) Disconnect 1 connector from the SLG board. (3) Remove 2 screws and take off the lens unit. Fig. 6-709 Notes: 1. When installing, fix the lens unit with the screws while pushing the unit to the rear side. 2. Refer to “3.7.2 Lens Unit” in the Service Handbook for the adjustment method. 3. Never attempt to loosen the screws (8 pcs.) of the lens unit denoted with arrows. Fig. 6-710 4. Handle the unit with extra care. Do not touch the adjusted area or lens. (Hold the unit as shown in the figure at right.) Fig. 6-711 e-STUDIO350/352/353/450/452/453 6 - 18 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved SCANNER...
Page 141 Rear side Fig. 6-712 (3) Remove 3 screws and take off the scan mo- tor. Note: When installing, use a stepped screw to fix the left rear point. Stepped screw Fig. 6-713 [G] Carriage-1 (1) Take off the original glass ( Chapter 6.7 [A]). (2) Take off the upper rear cover and front upper cover ( Chapter 2.5.1 [G][E]). (3) Move the carriage-1 to the position shown in the figure at right, and match the positions of each hole and screw. (4) Remove 2 screws. Then pull down each brack- et fixing the wire from the hole of the frame on Fig. 6-714 both ends of carriage-1. (5) Disconnect 1 connector from the SLG board. Remove 2 seals and release the cable. Fig. 6-715 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 6 - 19 e-STUDIO350/352/353/450/452/453 SCANNER...
Page 142 Seal Lamp harness figure, and fix it with a seal. 4. After the installation, move carriage-1 towards the left and confirm that there is no abnormality in the lamp harness, such Punched mark as twisting. Fig. 6-717 (6) Rotate the carriage-1 in the direction shown in the figure at right, not to touch the mirror. Then take off the carriage-1. Fig. 6-718 Note: ( A ) When installing the carriage-1, fix the bracket temporarily at the position (A). Then move it to the direction (B) slowly, push it to the end of frame and fix at this position with ( B ) the screws. (Refer to 3.7.1 in the Service Handbook.) ( A ) Fig. 6-719 e-STUDIO350/352/353/450/452/453 6 - 20 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved SCANNER 07/03...
Page 143 (1) Take off the carriage-1 ( Chapter 6.7 [G]). (2) Disconnect 2 connectors. (3) Remove 2 screws and take off the INV board. Fig. 6-720 [J] Carriage wire / Carriage-2 (1) Take off the carriage-1 ( Chapter 6.7 [G]). (2) Install the wire holder jig to each pulley on front and rear sides, not to loosen the car- riage wire. Note: Refer to “3.9 Adjustment of Carriages” in the Service Handbook for the installation direction of the wire holder jig. Fig. 6-721 (3) Remove the tension springs on both front Tension spring and rear sides. (4) Remove the carriage wires on both front and rear sides. Fig. 6-722 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 6 - 21 e-STUDIO350/352/353/450/452/453 SCANNER...
Page 144 Mirrors-2 and -3 should not be removed. [L] Platen sensor / Carriage home position Carriage home position sensor sensor (1) Take off the rear cover and upper rear cover ( Chapter 2.5.1 [C][G]). (2) Disconnect 1 connector from the platen sen- sor on the left rear position of the equipment upper side. (3) Release the latches of the sensor from the frame and take off the platen sensor. Platen sensor Fig. 6-724 (4) Disconnect 1 connector from the carriage home position sensor on the left rear posi- tion of the equipment upper side. (5) Release the latches of the sensor from the frame and take off the carriage home posi- tion sensor. e-STUDIO350/352/353/450/452/453 6 - 22 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved SCANNER 05/11...
Page 145 [M] SLG board (1) Take off the lens cover ( Chapter 6.7 [B]). (2) Disconnect 8 connectors from the SLG board. (3) Remove 6 screws and take off the SLG board. Note: The SLG board for e-STUDIO350/450 and the one for e-STUDIO352/353/452/453 are Fig. 6-725 different. To avoid confusion, the color of the connector CN19 on the SLG board for e-STUDIO352/353/452/453 is yellow. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 6 - 23 e-STUDIO350/352/353/450/452/453 SCANNER 07/11...
Page 147: Image Processing
[ CCD ] [ SLG ] [ LGC ] System secton [ SYS ] Semconductve laser element Photo- conductve drum Fig. 7-101 The followings are the boards used for image processing. Board Function High quality image processing, image memory editing, editing processing, SLG board gamma correction, gradation processing, scanner high quality image processing and external output system interface LGC board Smoothing processing, external input system interface, image area control, laser related control and printer high quality image processing © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 7 - e-STUDIO350/352/353/450/452/453 IMAGE PROCESSING 05/11...
Page 148 Coupled Device) reads the optical image signals and converts them into the electrical signals. The electrical signals are amplified and undergo analog-to-digital conversion, then are changed into digital signals. Shading correction (correction of variance in CCD elements and the light source) is performed and the digital signal is output as an image signal from the scanning section. to image Signal amplifi- A/D conver- processing Shading correc- cation sion section tion Fig. 7-102 The image processing section inputs the image signal from the scanning section and applies various image processing on the signal, then transmits the output result to the writing section. Images are processed by the SLG board and LGC board in this equipment. The image signal read in the scanning function is processed in SLG board and the printer image signal is processed in the SYS board. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 7 - 2 IMAGE PROCESSING 05/11...
Page 149: Configuration
nserton, sheet nserton mode, etc Prnter mage processng Smoothng processng External nput system nterface Image area control Laser related control Prnter hgh-qualty mage processng LDR board Image data flow Laser drve Fig. 7-201 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 7 - 3 e-STUDIO350/352/353/450/452/453 IMAGE PROCESSING 05/11...
Page 150: Slg Board
7.3 SLG Board 7.3.1 Features (1) The image processing section on the SLG board is controlled by the CPU on the SLG board. (2) The image processing section on the SLG board realizes the following when functioning the equipment: • High quality image processing • Image memory editing • Editing processing • Gamma correction • Gradation processing • External output system interface © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 7 - 4 IMAGE PROCESSING 05/11...
Page 151: Functions Of Image Processing Circuit
The mage processng secton mounted on the SYS board realzes the followngs: (1) High quality image processing (a) Background processing function (Rauge correction) This function removes undesirable background so that the original can be reproduced appropriately. By using the background adjustment function while manually adjusting the im- age density, undesirable background of the original can be removed if any, and some neces- sary but disappeared background can be recovered. By using this function, it is possible to cut the background density down to zero when copying originals which have a certain level of background density, such as newspapers. <Example> Dynamic range Extended dynamic range After range width width adjustment Back- ground Text Lower Density Higher Lower Density Higher Histogram Fig. 7-301 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 7 - 5 e-STUDIO350/352/353/450/452/453 IMAGE PROCESSING...
Page 152 0 2 3 4 5 7 0 2 3 4 5 7 Primary scanning pixel positions Primary scanning pixel positions Fig. 7-302 • High-pass filter processing Character outline blurs when the original, such as text, with big difference in density among the pixels is optically scanned and output from the CCD. Characteristic of the lens and other factors cause this phenomenon. In this equipment, processing such as edge enhancement is applied between the targeted pixel and the neighboring pixels to eliminate this phenomenon and realize high reproducibility of original. Solid black area Low contrast area Original Image signal After correction Fig. 7-303 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 7 - IMAGE PROCESSING...
Page 153 (2) Image memory editing This function performs editing such as enlargement/reduction, mirror imaging, etc., by using a line memory. Pixel data for one line in the primary scanning direction is stored in the line memory and the memory is renewed at each line. (a) Enlargement/Reduction Enlargement/Reduction is accomplished by using the line memory control function in the process of the image processing operation. <Example> Enlargement 00% 200% <Example> Reduction 00% Fig. 7-304 (b) Mirror imaging This is accomplished by reading and outputting data from its end. (3) Editing processing This function performs trimming and masking. (a) Trimming Using rectangular area signals, the image signals inside the rectangular area are left and the other image signals are eliminated. (b) Masking Using rectangular area signals, the image data inside the rectangular area are erased. (c) Negative/positive reversing This function reverses the entire date from negative to positive or vice versa. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 7 - 7 e-STUDIO350/352/353/450/452/453 IMAGE PROCESSING...
Page 154 (4) Gamma correction This function corrects the input/output characteristics of the scanner/printer and adjusts the image signals so that the input/output characteristics would match with the copy mode. (5) Gradation processing This function switches the type of gradation processing depending on the copy mode: A type which selects the printer characteristics giving the priority to resolution such as for text data, and another which selects the printer characteristics giving the priority to gradation reproducibility such as for photographic images. (6) External output system interface This function controls the output of the output interface. (7) Scanner high quality image processing This function corrects the image signals scanned by the scanner and reproduces them in a higher image quality. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 7 - IMAGE PROCESSING...
Page 155: Lgc Board
• Smoothing processing • External input system interface • Image area control • Laser related control • Printer high quality processing 7.4.2 Functions of image processing circuit The image processing section mounted on the LGC board realizes the followings: (1) Smoothing processing This function removes jagginess and smoothes character outline of images input from the exter- nal input system interface, and output them. (2) External input system interface This function controls the input of the input interface. (3) Image area control This function sets the effective image area in horizontal and vertical directions to be output. (4) Laser related control This function performs the APC (Auto Power Control). (5) Printer high quality processing This function reproduces the image signals output from the printer controller sharper. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 7 - e-STUDIO350/352/353/450/452/453 IMAGE PROCESSING 05/11...
Page 156: Laser Driving Pc Board (Ldr Board)
7.5 Laser Driving PC Board (LDR board) Image signals processed on the LGC board are then processed by ASIC for writing control and Laser driving PC board. The signal is then laser controlled and written on the drum. (1) Setting of effective image area ......• Top, bottom, left and right margins (2) Horizontal synchronization signal (H-Sync) ..• Reference clock signal in the printer section clock generation section synchronized with H-Sync and its signal. (3) Laser drive section ..........• ON/OFF control of the semiconductive laser and APC (Auto Power Control). © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 7 - 0 IMAGE PROCESSING 05/11...
Page 157: Laser Optical Unit
Image signal is converted into the light emission signal of the laser diode on the laser drive PC board, then ra- diated on the drum through the optical elements such as cylinder lens, polygonal mirror and fθ lenses. The unit must not be disassembled in the field as they are very sensitive to dust and finely ad- justed at the factory. Paper ext Front Rear Fig. 8-101 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 8 - 1 e-STUDIO350/352/353/450/452/453 LASER OPTICAL UNIT...
Page 158 Aperture Laser drve PC Paper ext board Cylnder lens Front Polygonal motor drve PC board H-Sync sgnal detecton PC board Rear f lens-2 Slt glass ( for outgong laser beam ) H-Sync returnng mrror Fig. 8-102 e-STUDIO350/352/353/450/452/453 8 - 2 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved LASER OPTICAL UNIT...
Page 159: Structure
8.2 Structure (1) Laser emission Unit This unit consists of the laser diode, finite focus lens, aperture and cylinder lens. a. Laser diode This laser diode features low droop, small laser variation and low threshold current. Aperture determines the shape of the laser beam at laser emission position of the primary scanning and secondary scanning. Laser diode radiates the laser beam responding to the laser emission control (ON/OFF) signal from the laser driving PC board. Laser beam which passed through the finite focus lens is focused on the drum surface. b. CAUTION The beam of the semiconductor laser is very weak (about 5 mW), but focused parallel rays creates great energy which is hazardous. Some material of the components of the laser optical unit are metal. Since the unit is in a sealed container, there is no danger of laser leakage during normal operation. Note: Laser beam is not visible. Pay the closest attention when handling the laser unit components or performing operations such as adjustment of the laser beam, and this kind of operations are very dangerous and must be performed only by specially trained staff. The warning label shown below is attached on the inner housing at the front side of the equipment. Fig. 8-201 [CAUTION] • Do not approach tools near the path of the laser beam. • Take off your watches, rings, bracelets, etc. before handling the unit. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 8 - 3 e-STUDIO350/352/353/450/452/453 LASER OPTICAL UNIT...
Page 160 Laser beam scan is performed on one plane of the polygonal mirror. ( C ) As the polygonal mirror has eight planes, eight scans are performed in one rotation of the polygonal mirror. c. Polygonal mirror cover Polygonal mirror cover reduces the wind- age loss and noise, prevents adhesion Drum of foreign objects onto the mirror surface Laser beam and releases heat. Fig. 8-202 One scan is completed by completion of steps (A) to (C). One scan is performed on one plane of the polygonal- mirror. Eight scans can be made with one rotation of the polygonal mirror. e-STUDIO350/352/353/450/452/453 8 - 4 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved LASER OPTICAL UNIT...
Page 161 Lens- fØ Lens-2 Same ntervals Fig. 8-203 b. Face tilt correction Mrror plane s tlted. Devaton The reflecting face of the polygonal mir- ror is tilted slightly to one side against the perfect vertical. Horizontal deviation of the laser beam which is caused by the tilt is corrected. c. Sectional shape of laser beam Fig. 8-204 The shape of the laser beam spotted on the drum is adjusted. (4) H-Sync signal detection PC board The laser beam which is started to be scanned from one of the reflected plane of the polygonal mirror is reflected by the H-Sync detection mirror and enters the PIN diode on the H-Sync signal detection PC board. The primary scanning synchronizing signal is generated based on this reflec- tion. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 8 - 5 e-STUDIO350/352/353/450/452/453 LASER OPTICAL UNIT...
Page 162 (5) Laser Driving PC Board This control board has the following functions: a. APC control function (adjusts disparity of the laser intensity caused by temperature) b. Laser ON/OFF function (6) Slit glass Slit glass is located where the laser beam is output from the laser optical unit, and it protects the unit from dust. e-STUDIO350/352/353/450/452/453 8 - 6 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved LASER OPTICAL UNIT...
Page 163: Laser Diode
Constant optcal output Montor eff- cency regula- Montor output ton crcut Fig. 8-302 Fig. 8-302 shows a block diagram of the semiconductive laser control circuit. The semiconductive la- ser performs monitor efficiency regulation (a process to control monitor current for the light amount), and laser itself is adjusted to initial output emission of approx. 2.11 mW (approx. 421 µW on the drum surface). The regulated voltage of the monitor output is fed back to the laser power comparison cir- cuit. This monitor output voltage is compared with the laser power voltage set for the control circuit for every scanning. Laser driver circuit increases the forward current if the laser power is insufficient, and decreases the current when the power is excessive to maintain a constant optical output. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 8 - 7 e-STUDIO350/352/353/450/452/453 LASER OPTICAL UNIT...
Page 164: Laser Optical Unit Cooling Fan
(1) Drive circuit of the polygonal motor P93/T03 POMON P86/T0A POMCK IC24 P92/T12 POMPL LGC board POL board Fig. 8-501 (2) Control signal The polygonal motor is a DC motor which is PLL-controlled by clock signals. The signals from LGC board control the polygonal motor. Signal Level “L” Level “H” Remarks POMON Polygonal motor ON signal POMCK — — Polygonal motor reference clock signal POMP Normal rotation Abnormal rotation Polygonal motor PLL signal e-STUDIO350/352/353/450/452/453 8 - 8 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved LASER OPTICAL UNIT 05/11...
Page 165: Disassembly And Replacement
8.6 Disassembly and Replacement [A] Laser optical unit (1) Take off the receiving tray Chapter 2.5.1 [H]). (2) Take off the front left cover Chapter 2.5.1 [B]). (3) Disconnect the connector with lock (CN206) and connector (CN207) on the LRL PC board. (4) Disconnect the joint connector between the laser unit fan and polygonal motor. Fig. 8-601 (5) Remove 1 screw on the front side and loosen 1 screw on the rear side. Fig. 8-602 (6) Stand the laser optical unit against the rear side of the equipment by moving the relay stay to the rear side. Be careful not to fold the cable on the relay stay rear side. Fig. 8-603 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 8 - 9 e-STUDIO350/352/353/450/452/453 LASER OPTICAL UNIT...
Page 166 4. When installing, fix the laser optical unit with the screws securely by matching the bosses on the bottom of the unit with the holes of the frame. [B] Laser unit fan (1) Take off the receiving tray Chapter 2.5.1 [H]). (2) Disconnect 1 connector. (3) Remove 2 screws and take off the laser unit fan. Fig. 8-605 [C] LRL PC board (1) Take off the receiving tray Chapter 2.5.1 [H]). (2) Disconnect 2 connectors with lock (CN204 and CN206) and 1 connectors (CN207). (3) Remove 1 screw. Take off the LRL PC board by releasing 2 locking supports. Fig. 8-606 e-STUDIO350/352/353/450/452/453 8 - 10 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved LASER OPTICAL UNIT 04/10...
Page 167: Paper Feeding System
The paper feeding system mainly consists of the pickup roller, feed roller, separation roller, transport roller, registration roller, bypass paper sensor, drawer empty sensor, drawer paper stock sensor, feed sensor, registration sensor and the drive system for these components. , 20,2 Fig. 9-101 Sectional view of paper feeding section (Front side) Name Name Upper drawer separation roller Bypass transport roller Upper drawer feed roller Upper drawer feed sensor Upper drawer pickup roller Lower drawer feed sensor Lower drawer separation roller Upper drawer empty sensor Lower drawer feed roller Upper drawer paper stock sensor Lower drawer pickup roller Upper drawer tray-up sensor Registration sensor Lower drawer empty sensor Registration roller (rubber) Lower drawer paper stock sensor Registration roller (metal) Lower drawer tray-up sensor Transport roller Bypass paper sensor Bypass pickup roller Bypass feed sensor Bypass feed roller Bypass separation roller © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 9 - 1 e-STUDIO350/352/353/450/452/453 PAPER FEEDING SYSTEM...
Page 168 Feeding system drive gear (2) (20/25) (27/) (40/34) (2) (2) Upper drawer (3/3) (24/30) (23) (35) Bypass unit (25/2) (2) (34) (2) Lower drawer (33) (35) (33) (35) Fig. 9-102 Paper feeding section drive system (Rear side) Name Bypass feed clutch Transport clutch (Low speed) Transport clutch (High speed) Upper drawer feed clutch Lower drawer feed clutch e-STUDIO350/352/353/450/452/453 9 - 2 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM...
Page 169 This roller moves up and down to draw out a sheet of paper from the bypass tray or the drawer, and transport it to the feed roller. (2) Feed roller This roller transports the paper from the pickup roller to the registration roller. (3) Separation roller This roller is mounted against the feed roller. When two sheets of paper or more are transported from the pickup roller, the load of the torque limiter (spring) of the separation roller is greater than the frictional force between the sheets. As the result, the separation roller is stopped and the lower sheet of paper is not transported any further. When only one sheet of paper is transported from the pickup roller, the separation roller is forced to rotate following the feed roller. (4) Transport roller This roller transports the paper from the feed roller to the registration roller. (5) Registration roller Paper transported from the feed roller is pushed against the registration rollers, which aligns the leading edge of paper. The registration roller then rotates to transport the paper to the transfer section. The following sensors detect the presence/absence of paper and the position of the paper being trans- ported, to control the ON/OFF of the corresponding rollers. (6) Bypass paper sensor This sensor detects whether paper is set in the bypass tray or not. If it is, bypass feeding is per- formed in preference to drawer feeding. (7) Bypass feed sensor This sensor detects whether paper has been transported from the bypass tray or not. It also de- tects whether the leading/trailing edge of paper has passed the feed sensor or not. This sensor is utilized to detect the jams such as paper misfeeding in the bypass unit. (8) Drawer empty sensor This is a transmissive-type sensor which detects the presence/absence of paper in the drawer using an actuator. When there is no paper in the drawer, the actuator blocks the light path of the sensor. Then the sensor determines that there is no paper. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 9 - 3 e-STUDIO350/352/353/450/452/453 PAPER FEEDING SYSTEM...
Page 170 (9) Drawer paper stock sensor This is a transmissive-type sensor which detects the amount of paper remaining in the drawer us- ing an actuator. When the remaining paper has become around 100 sheets, the actuator blocks the light path of the sensor to notify that the paper quantity is getting less. (10) Feed sensor This sensor detects whether the leading/trailing edge of paper has passed the feed roller or not. It also detects jams such as paper misfeeding. (11) Registration sensor This sensor detects whether the leading edge of the paper has reached the registration roller or not, and the trailing edge of paper has passed the registration roller or not. e-STUDIO350/352/353/450/452/453 9 - 4 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM...
Page 171: Operation
Gear on the equipment side Bypass feed clutch Coupling Bypass transport roller Bypass feed roller Bypass pickup roller Bypass separation roller Fig. 9-201 When the paper is set on the bypass tray, the bypass feed sensor detects the presence of the paper. Then the bypass pickup solenoid is turned ON and the pickup arm falls by its own weight. At this time, when the bypass feed clutch is turned ON, the drive from the equipment is transmitted to the pickup roller through the coupling and timing belt. Then the paper is picked up. The paper picked up is transported to the transport path on the equipment side by the feed roller and transport roller. When there is no paper remaining on the bypass tray, the bypass pickup solenoid is turned OFF and the pickup roller returns by the spring force. The separation roller works not to transport paper more than one sheet at a time. 9.2.2 Operation of drawer pickup roller Drawer feed clutch Drawer feed roller Drawer pickup roller Drawer separation roller Fig. 9-202 When the drawer is inserted, the pickup roller and roller holder fall by the spring force. Then the drawer tray lifts up and paper feeding is enabled. When the drawer feed clutch is turned ON, the drive from the equipment is transmitted. Then the feed roller and pickup roller rotate to transport the paper from the drawer. The separation roller under the feed roller prevents multiple transporting of paper. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 9 - 5 e-STUDIO350/352/353/450/452/453 PAPER FEEDING SYSTEM...
Page 172: Separation Of Paper
B is braked by the separation roller and is not transported any further. e-STUDIO350/352/353/450/452/453 9 - 6 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM...
Page 173: General Operation
(3) If either of the feed sensors is ON (= there is paper on the transport path) at power-ON, it is determined that a paper jam has occurred and no operation is enabled until the jammed paper is removed. [B] Ready status (1) After the tray is moved up to check the presence/absence of paper as described above, the equipment enters the ready state. During the ready mode, the tray stays at the raised position. (2) When a drawer is inserted or removed in the ready state, the tray is raised again and checks the presence/absence of paper. [C] Bypass feeding The bypass paper sensor detects paper in the bypass tray. • The bypass pickup roller is lowered when the bypass pickup solenoid is turned ON. • The bypass feed clutch is turned ON, and then the bypass pickup roller and bypass feed roller • are rotated. Paper feeding is started and the bypass feed sensor detects the passing of paper. • The leading edge of paper turns the registration sensor ON and the paper is aligned by the • registration rollers. The bypass feed clutch is turned OFF, causing the bypass pickup roller and bypass feed roller • to stop rotating. The bypass pickup solenoid is turned OFF, and the bypass pickup roller moves up. • The registration clutch is turned ON, and the paper is transported to the transfer unit. • © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 9 - 7 e-STUDIO350/352/353/450/452/453 PAPER FEEDING SYSTEM...
Page 174 [D] Paper feeding (D-1) Lower drawer The feed clutch and transport clutch (high speed) are turned ON, and the pickup roller, feed • roller and transport roller rotate to start paper feeding. The leading edge of paper turns the lower drawer feed sensor ON, and the feed clutch and • transport clutch (high speed) are turned OFF and then back ON. The leading edge of paper turns the registration sensor ON and the paper is aligned by the • registration rollers. The feed clutch and transport clutch (high speed) are turned ON, and the pickup roller, feed • roller and transport roller stop rotating. The registration clutch and transport clutch (low speed) are turned ON, and the paper is • transported to the transfer unit. (D-2) Upper drawer The feed clutch is turned ON and the pickup roller and feed roller rotate to start paper feeding. • The leading edge of paper turns the registration sensor ON, and the paper is aligned by the • registration rollers. The feed clutch is turned OFF and the pickup roller and feed roller to stop rotating. • The registration clutch is turned ON, and the paper is transported to the transfer unit. • e-STUDIO350/352/353/450/452/453 9 - 8 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM...
Page 175: Drive Circuit Of Tray-Up Motor
9.3 Drive Circuit of Tray-up Motor The tray-up motor (T-UP-MTR) is driven by the LGC board IC1 (LGC: TA8428). The block diagram of TA8428 is shown below. Thermal shutdown over-current protecton crcut Control logc M(+) M(-) N.C. Fig. 9-301 IN1 and IN2 are input terminals to receive the signals from the tray-up motor. The control logic based on the signals from the tray-up motor, controls ON/OFF of the rotation direction. Input Output State M (+) M (–) Brake OFF (high im- Stop pedance) © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 9 - 9 e-STUDIO350/352/353/450/452/453 PAPER FEEDING SYSTEM...
Page 176: Disassembly And Replacement
(A-1) Bypass unit (1) Remove the upper/lower drawer. (2) Remove 2 screws and take off the right front hinge cover. Right front hinge cover Screw Fig. 9-401 (3) Remove 2 screws and take off the right rear hinge cover. Right rear hinge cover Screw Fig. 9-402 (4) Remove 2 screws and take off the right lower cover. Right lower cover Screw Fig. 9-403 (5) Remove 1 screw and take off the 2 ground wires. (6) Disconnect 1 connector and release the harness from harness clamp. Connector Ground wire Screw Fig. 9-404 e-STUDIO350/352/353/450/452/453 9 - 10 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM...
Page 177 (7) Open the side cover. Side cover Fig. 9-405 (8) Remove 2 screws, lift the bypass unit up, remove 2 hooks and pull it out to the front. Screw Bypass unit Screw Fig. 9-406 (A-2) Hinge assembly (1) Take off the bypass unit ( Chapter 9.4 (A-1)). (2) Disconnect 1 connector and release the har- ness from harness clamp. Fig. 9-407 (3) Remove 2 screws and slide the hinge as- sembly to take it off with the tray. (Standing the tray makes easier to be removed.) Screw Fig. 9-408 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 9 - 11 e-STUDIO350/352/353/450/452/453 PAPER FEEDING SYSTEM...
Page 178 (A-3) SFB board Screw (1) Take off the bypass unit ( Chapter 9.4 (A-1)). (2) Take off the hinge assembly ( Chapter 9.4 (A-2)). Bypass tray (3) Remove 3 screws, 4 latches and 3 hooks, upper cover and take off bypass tray upper cover. Fig. 9-410 (4) Remove 1 screw and take off the plate Plate Bracket spring. spring (5) Remove 1 screw on the tray side and take off the bracket. Screw Fig. 9-411 Note: Install the bracket so that its pointer is placed at the same position as before. Pointer Fig. 9-412 e-STUDIO350/352/353/450/452/453 9 - 12 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM...
Page 179 Screw SFB board Fig. 9-413 (A-4) Bypass pickup solenoid Bypass feed upper cover Screw (1) Take off the bypass unit ( Chapter 9.4 (A-1)). (2) Remove 1 screw and slide the bypass feed upper cover to take it off. Fig. 9-414 (3) Remove 4 screws and take off the upper Screw plate. Upper plate Fig. 9-415 (4) Disconnect 1 connector, remove 1 spring Bypass pickup and take off the bypass pickup solenoid with solenoid the solenoid arm. Spring Solenoid arm Fig. 9-416 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 9 - 13 e-STUDIO350/352/353/450/452/453 PAPER FEEDING SYSTEM...
Page 180 (4) Take off the spring and sensor arm. Sensor arm Spring Fig. 9-417 (5) Disconnect the connector from the sensor and release the latch to take off the bypass paper sensor. Bypass paper sensor Fig. 9-418 (A-6) Bypass pickup roller Screw Bypass feed upper cover (1) Take off the bypass unit ( Chapter 9.4 (A-1)). (2) Remove 1 screw and take off the bypass feed upper cover . Fig. 9-419 (3) Remove 4 screws and take off the bypass Screw Bypass drive unit drive unit. Screw Fig. 9-420 e-STUDIO350/352/353/450/452/453 9 - 14 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM...
Page 181 (4) Remove the clip, pull out the shaft and take off the bypass feed roller. Note: Fig. 9-422 Make sure the following items when assembling the bypass feed roller and bypass pickup roller. Set the timing belt to the pulley securely. Do not put the wrong position when set ting the timing belt. Be sure to insert the clip into the groove of shaft. Check that there is no stain such as oil on the surface of timing belt, the pulley and the roller. Install the bypass pickup roller and the bypass feed roller in the correct direction. (A-8) Bypass transport roller (1) Take off the bypass feed upper cover Chapter 9.4 (A-6)). (2) Take off the bypass drive unit ( Chapter 9.4 (A-6)). (3) Remove the E-ring, pull out the shaft and E-ring Bushing take off the bypass transport roller. Bypass transport roller Bushing Fig. 9-423 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 9 - 15 e-STUDIO350/352/353/450/452/453 PAPER FEEDING SYSTEM...
Page 182 Screw Fig. 9-425 (6) Remove the E-ring and the bush, and then pull out the shaft. Shaft (7) Remove 3 screws and take off the bracket. Bypass feed (8) Remove the gear and the bypass feed clutch clutch. Note: Bush Match the protruding portion of the clutch with the position shown in the drawing for assem- E-ring bling. Fig. 9-426 (A-10) Bypass separation roller Screw (1) Take off the bypass unit Chapter 9.4 (A-1)). Lower plate (2) Remove 3 screws and take off the lower plate. Fig. 9-427 e-STUDIO350/352/353/450/452/453 9 - 16 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM...
Page 183 Clutch spring Cover Bypass separation roller Fig. 9-429 (A-11) Bypass feed sensor Screw (1) Take off the bypass unit ( Chapter 9.4 (A-1)). Sensor plate (2) Take off the lower plate ( Chapter 9.4 (A-10)). (3) Remove 1 screw and take off the sensor plate. Fig. 9-430 (4) Disconnect 1 connector, release the latch to take off the bypass feed sensor. Note: Be careful not to come off the sensor arm Bypass feed sensor and the sensor spring after taking off the sensor. Sensor Spring Sensor arm Fig. 9-431 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 9 - 17 e-STUDIO350/352/353/450/452/453 PAPER FEEDING SYSTEM...
Page 184 (5) Take off the front right cover Chapter 2.5.1 [B]). (6) Take off the cleaner unit Jam access cover Chapter 11.6 [A]). Fig. 9-432 (7) Open the jam access cover. (8) Release the latch and take off the transfer/ separation charger. Note: Be sure that the spring is inserted in 2 termi- nals when assembling. Latch Transfer/ separation charger Fig. 9-433 (9) Disconnect 3 connectors. Note: Connector Hook the harness on the hook securely when inserting the connector of the transfer/ separation charger. Hook Fig. 9-434 (10) Disconnect the connector on the front side. Connector Fig. 9-435 e-STUDIO350/352/353/450/452/453 9 - 18 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM...
Page 185 (11) Take off the jam access cover. Jam access cover Fig. 9-436 (12) Disconnect the connector and remove the Harness harness. Connector Fig. 9-437 (13) Remove 2 screws and take off the right Bypass transport guide Spring transport guide. Note: When taking off the right transport guide, be careful not to come off the bypass transport Screw guide and the spring together with it. Right transport guide Screw Fig. 9-438 (14) Release the latch and take off the lower Right transport guide drawer feed sensor. Lower drawer feed sensor Fig. 9-439 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 9 - 19 e-STUDIO350/352/353/450/452/453 PAPER FEEDING SYSTEM...
Page 186 (6) Take off the right rear cover ( Chapter 2.5.1 [G]). (7) Remove 1 screw and take off the front cover stay. Front cover stay Fig. 9-440 (8) Release the latch from the shaft and take off the jam release knob. Latch release knob Fig. 9-441 (9) Remove 1 screw and take off the terminal Screw cover. Lead wire (10) Remove 1 screw and disconnect the red lead wire from the terminal cover. Note: Make sure that the harness is inserted into the dent of the terminal cover when install- Terminal ing. cover Fig. 9-442 (11) Disconnect 2 connectors. Connector Fig. 9-443 e-STUDIO350/352/353/450/452/453 9 - 20 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM...
Page 187 Fig. 9-444 (13) Remove 2 screws and take off the registra- Roller supporting section tion front guide. Registration Note: front guide Be careful not to deform or damage the roller supporting section when installing or taking off the registration front guide. Screw Fig. 9-445 (14) Remove 1 screw and take off the registra- Screw tion sensor with bracket. Registration (15) Disconnect the connector, release the latch sensor to take off the registration sensor. Connector Fig. 9-446 (16) Disconnect the connector, take off the upper drawer feed sensor. Connector Upper drawer feed sensor Fig. 9-447 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 9 - 21 e-STUDIO350/352/353/450/452/453 PAPER FEEDING SYSTEM...
Page 188 (6) Take off the right rear cover ( Chapter 2.5.1 [G]). (7) Take off the SYS board cover ( Chapter 2.5.2 [C]). (8) Take off the developer cooling fan-2 Chapter 11.6 [I]). (9) Disconnect 1 connector of the registration clutch. (10) Loosen 1 setscrew and take off the registra- tion clutch. Setscrew Note: Match the protruding portion of the clutch with the position shown in the drawing for Connector assembling. Fig. 9-448 (11) Disconnect 1 connector of the fan motor. (12) Remove 1 screw and take off the developer unit cooling fan-1 unit. Connector Screw Developer unit cooling fan-1 unit Fig. 9-449 e-STUDIO350/352/353/450/452/453 9 - 22 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM 05/11...
Page 189 (13) Disconnect 3 connectors of the drive gear Connector unit. Connector Fig. 9-450 (14) Disconnect 2 connectors wired from the drive gear unit. Connector Fig. 9-451 (15) Remove 5 screws and take off the drive gear unit. Screw Screw Drive gear unit Fig. 9-452 (16) Remove the E-ring and the bushing of the E-ring registration roller (1 pc. each). (17) Remove the E-ring and the bushing on the Bushing front side and slide the registration roller Bushing (rubber) to the rear side to take it off. E-ring Registration roller (rubber) Fig. 9-453 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 9 - 23 e-STUDIO350/352/353/450/452/453 PAPER FEEDING SYSTEM...
Page 190 (2) Take off the rear cover ( Chapter 2.5.1 [H]). (3) Take off the right rear hinge cover Chapter 2.5.1 [D]). (4) Remove 4 screws and take off the right lower cover ( Chapter 2.5.1 [E]). (5) Remove 4 screws and take off the noise filter assembly. Screw Screw Fig. 9-455 (6) Disconnect 1 connector of the tray drive unit Screw Connector and release the harness from the harness clamp. (7) Remove 5 screws and take off the tray drive unit with the plate. Screw Tray drive unit Fig. 9-456 (8) Remove 4 screws and detach the tray drive unit from the plate. Fig. 9-457 e-STUDIO350/352/353/450/452/453 9 - 24 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM 06/03...
Page 191 (9) Place the unit with its coupling up and re- Coupling lease 6 latches to take off the cover. Coupling Note: Be careful in taking off the cover because there is a spring in the tray drive unit. Spring Fig. 9-458 (10) Take off the tray-up motor. Tray-up motor Fig. 9-459 Note: Match the boss of the gear with the hole of the cover when installing the motor. Fig. 9-460 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 9 - 25 e-STUDIO350/352/353/450/452/453 PAPER FEEDING SYSTEM...
Page 192 (3) Remove 3 screws, 1 E-ring and take off the clutch bracket. Note: Bush Do not apply pressure the transport clutch E-ring in all directions when installing the clutch Fig. 9-461 bracket. After installing it, open the side cover and check that the transport roller rotates smoothly. (4) Remove 2 gears and disconnect 2 connec- tors. Connector Gear Fig. 9-462 (5) Take off the upper and lower transport Upper transport clutch clutch. (Remove the gear and disconnect Setscrew the connector respectively, and then loosen the setscrew to take them off.) Notes: Make sure that the upper and lower clutch are different in size when installing them. Upper side: Shaft diameter, 8 mm Lower transport clutch Lower side: Shaft diameter, 6 mm Fig. 9-463 e-STUDIO350/352/353/450/452/453 9 - 26 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM...
Page 193 (H-1) Drawer feeding unit (1) Take off the upper and lower drawers. (2) Remove 1 screw and take off the drawer Screw feeding unit by sliding it to the front side. Drawer feeding unit Fig. 9-466 (H-2) Tray-up sensor Tray-up sensor (1) Take off the drawer feeding unit ( Chap- ter 10.4 (H-1)). Empty (2) Disconnect the connector and release the sensor latch to take off the tray-up sensor. (H-3) Empty sensor (1) Take off the drawer feeding unit Chapter 10.4 (H-1)). (2) Disconnect the connector and release the Fig. 9-467 latch to take off the empty sensor. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 9 - 27 e-STUDIO350/352/353/450/452/453 PAPER FEEDING SYSTEM...
Page 194 Fig. 9-468 (H-5) Separation roller Screw (1) Take off the drawer feeding unit Chapter 10.4 (H-1)). (2) Remove 1 screw and take off the separation roller holder. Separation roller holder Fig. 9-469 (3) Detach the lever from the holder and take off the separation roller with the shaft. Lever Separation roller Fig. 9-470 (4) Detach the cover, the arbor, the clutch Arbor spring and the washer from the shaft, and Cover Clutch spring then take off the separation roller. Separation roller Washer Shaft Arbor Fig. 9-471 e-STUDIO350/352/353/450/452/453 9 - 28 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM...
Page 195 (H-7) Pickup roller Pickup roller As- (1) Take off the drawer feeding unit sembly Chapter 10.4 (H-1)). (2) Remove the pickup roller assembly from the pickup arms and take off the belt. Belt Fig. 9-473 (3) Remove 3 E-rings, pulley, one-way clutch E-ring and take off the pickup roller. Pickup roller One-way clutch Pulley E-ring Fig. 9-474 (H-8) Drawer feed clutch (1) Take off the drawer feeding unit ( Chap- ter 10.4 (H-1)). (2) Disconnect the connector and release the harness from harness clamp. Connector Fig. 9-475 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 9 - 29 e-STUDIO350/352/353/450/452/453 PAPER FEEDING SYSTEM...
Page 196 (3) Remove 2 screws and take off the clutch bracket and bush. Notes: Bush Match the protruding portion of clutch with the position shown in the drawing for as- sembling. Clutch bracket Fig. 9-476 (4) Loosen 1 setscrew and take off the drawer feed clutch. Drawer feed clutch Setscrew Fig. 9-477 Notes: Attach the clutch to the shaft referring to the figure at right. 0.2-0.5mm Fig. 9-478 e-STUDIO350/352/353/450/452/453 9 - 30 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved PAPER FEEDING SYSTEM...
Page 197: Drive System
(24) roller drive gear F: Transport roller drive gear G: Feed roller drive gear (47) (25) Fig. 10-101 10.2 Functions A: Drum drive ......Drives the drum by transmitting the rotation of the main motor through the gears to the drum flange gear. B: Developer unit drive ..Drives the developer unit by transmitting the rotation of the main mo- tor through the gears and clutch to the developer unit gears. C: Fuser unit drive ....Drives the fuser unit by transmitting the rotation of the main motor through the gears to the fuser unit gears. D: Cleaner unit drive ....Drives the cleaner unit gear by the rotation of the drum flange gear. E: Registration roller drive ..Drives the registration rollers by transmitting the rotation of the main motor through the gears and clutches. Transport roller drive ..Drives the transport roller by transmitting the rotation of the main mo- tor through the gears and clutches. G: Feed roller drive ....Drives the drawer feed roller by transmitting the rotation of the main motor through the gears and clutches. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 10 - 1 e-STUDIO350/352/353/450/452/453 DRIVE SYSTEM 04/01...
Page 198: Main Motor
Lock protecton crcut Fig. 10-301 (1) LGC board outputs the control signals for the main motor rotation. (MAMCW: Motor rotation direc- tion setting, MAMON: Motor rotation command) (2) The excitation phase switching section excites each phase of the main motor. → The main motor is rotated. (3) Hall elements A, B and C detect the rotation position of the motor (rotor). (4) The excitation phase switching section switches the excitation of each phase. (The motor keeps rotating by repeating from (2) to (4).) (5) An FG pulse is generated by the FG pattern of the encoder attached to the main motor. (6) The FG pulse and the reference frequency from the LGC board are compared in terms of the phase and speed, and the difference is added to the IC1. The fluctuations in the power supply voltage is also added to the value. (Signal generation) (7) In accordance with the signal obtained in the step (6), the excitation phase switching section changes the switching timing. i.e. The FG pulse and reference frequency are controlled to be equal. → The main motor rotates at a fixed speed. (Locked range) (8) When the main motor enters the locked range, the excitation phase switching section outputs the MAMPL signal to the LGC board. (“L” level) (9) When the MAMBK from the LGC board becomes “L” level, the main motor is braked. When the MAMON signal becomes “H” level, the main motor is stopped. e-STUDIO350/352/353/450/452/453 10 - 2 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved DRIVE SYSTEM...
Page 199: Control Signals
(2) MAMPL signal (MTR → LGC: Output) When the difference of the FG pulse cycle against the reference frequency is within ±6.25%, it is specified that the motor is in a lock range (normal rotation), and this MAMPL signal becomes “L” level. At this time, the LED “D4” is lit. (3) MAMCK signal (LGC → MTR: Input) This is a reference clock signal to rotate the main motor at a fixed speed. (4) MAMBK signal (LGC → MTR: Input) This is a signal to stop the main motor. When it becomes “L” level, the main motor is braked. (5) MAMON signal (LGC → MTR: Input) This is a signal to turn ON/OFF the main motor. When it becomes “L” level, the motor is rotated. Signal level of the motor circuit Signal Level “H” Level “L” MAMCW CCW direction CW direction MAMPL Abnormal rotation Normal rotation MAMCK Reference clock signal MAMBK Brake OFF Brake ON MAMON Motor OFF Motor ON * The signal names are for the connector CN318 (LGC board). © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 10 - 3 e-STUDIO350/352/353/450/452/453 DRIVE SYSTEM...
Page 200: Disassembly And Replacement
[D]). (3) Take off the developer cooling fan-2 Chapter 11.6 [I]). Connector (4) Disconnect 1 connector, loosen 1 setscrew and take off the registration clutch. Registration clutch Fig. 10-403 [C] Gear unit (1) Take off the rear cover ( Chapter 2.5.1 [H]). Connector (2) Take off the SYS board case ( Chapter 9.4 [D]). Connector (3) Take off the developer unit cooling fans-1 & -2 ( Chapter 11.6 [I]). (4) Take of the registration clutch ( Chapter 10.4 [B]). Connector (5) Disconnect 3 connectors. Fig. 10-404 e-STUDIO350/352/353/450/452/453 10 - 4 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved DRIVE SYSTEM...
Page 201 (6) Disconnect 2 connectors. Connector Fig. 10-405 (7) Remove 5 screws and take off the gear unit. Screw Gear unit Screw Fig. 10-406 [D] Developer drive clutch Screw (1) Take off the gear unit ( Chapter 10.4 [C]). Bracket (2) Remove 2 screws and take off the bracket. (3) Remove the bushing and take off the devel- Bushing oper drive clutch. Note: Match the protruding portion of clutch with Developer drive the position shown in the drawing for as- clutch Fig. 10-407 sembling. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 10 - 5 e-STUDIO350/352/353/450/452/453 DRIVE SYSTEM 04/01...
Page 203: Drum Related Section
• Sub-separation fan / Exhaust fan • Discharge LED • Toner bag • Developer unit cooling fan-1 / Developer unit cooling fan-2 / Middle fan • Drum thermistor (in developer unit) • High-voltage transformer Toner recovery auger • Temperature/humidity sensor Toner recovery blade Cleaning blade Sub-separation fan Discharge LED Main charger Exhaust fan Drum thermstor Separation charger Transfer charger Middle cooling fan Drum Transfer guide Fig. 11-101 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved - e-STUDIO350/352/353/450/452/453 DRUM RELATED SECTION...
Page 204: Functions
(d) Toner bag full detection sensor -1 The sensor detects the toner bag full when t s pushed by the toner recovery auger n the cleaner whch s gven a pressure from the used toner n the toner bag. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 - 2 DRUM RELATED SECTION...
Page 205 When the sensors are in trouble, "Toner bag full" is determined instead of "Call for service". If "Toner bag full" status is not cleared, the sensors, harnesses and LGC board need to be checked. Detection standard line Fig. 11-201 (6) Sub-separation fan / Exhaust fan The sub-separation fan works to assist the separation of paper from the drum surface by absorb- ing the air from the back of the paper. The exhaust fan removes ozone generated by corona discharge with the ozone filter, and also cools down the inside of the equipment. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved - 3 e-STUDIO350/352/353/450/452/453 DRUM RELATED SECTION 04/01...
Page 206 (7) Discharge LED Discharging is a process to decrease or eliminate the static electricity on the drum surface. The electrical resistance of the photosensitive layer is decreased by the light irradiation, and the residual charge on the drum surface is neutralized and eliminated (cleaned). The electrical poten- tial of the drum surface is fixed to a certain amount before the drum is charged (The pre-exposure effect). (8) Toner bag The residual toner scraped off the drum surface by the cleaning blade is disposed in this bag. (9) Developer unit cooling fan-1 / Developer unit cooling fan-2 / Middle fan The developer unit cooling fans-1 and -2, which work to cool down the inside of the equipment, absorb the air from the back of the equipment. The middle fan discharges the air around the de- veloper unit. (10) Drum thermistor The electrical charge amount of drum surface varies depending on the drum surface temperature. Therefore, this thermistor detects the drum surface temperature to control to maintain the charge amount at a certain level. Additionally, the exhaust fan and developer unit cooling fans-1 and -2 change their rotation speed according to the temperature detected by the drum thermistor when the equipment is in ready status or scanning the image. (11) High-voltage transformer This is board to generate the output control voltage of the main charger, transfer charger, separa- tion charger and developer bias. (12) Temperature/Humidity sensor This sensor detects the temperature and humidity inside of the equipment since the auto-toner output, main charger grid, developer bias and laser output are affected by environmental ele- ments such as temperature or humidity. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 - 4 DRUM RELATED SECTION...
Page 207: Output Control Circuits Of High-Voltage Transformer
IC32 IC38 guide bias LGC board Fig. 11-301 • Outputs the adjustment value of the main, transfer and separation chargers, developer bias and transfer guide bias in the NVRAM to the ASIC GA. ↓ • Outputs the control voltage data from the ASIC GA to the D/A converter. ↓ • Converts to the analog data by the D/A converter. ↓ • Outputs the control voltage Vc to the main, transfer and separation chargers, developer bias and transfer guide bias transformer. ↓ • The main, transfer and separation chargers, developer bias and transfer guide bias transformer gen- erate output current or voltage which is proportional to the control voltage Vc. * Adjustment of the control voltage Vc (change of adjustment data) is performed in the adjustment mode (05). * The output value of the transfer guide bias is fixed when the high-voltage transformer is shipped from the factory. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved - 5 e-STUDIO350/352/353/450/452/453 DRUM RELATED SECTION 04/01...
Page 208 CN30-B2 HVSAV Separaton charger CN30-B HVTVR Transfer charger CN30-B7 HVDVR conveter Developer bas CN30-B5 HVMVR Man charger ASIC NVRAM IC3 IC32 Fig. 11-302 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 - DRUM RELATED SECTION...
Page 209: Drum Temperature Detection Circuit
11.4 Drum Temperature Detection Circuit (1) Purpose of the drum temperature detection circuit The amount of charge on the drum surface varies greatly with the surface temperature of the drum. This circuit detects the temperature of the drum surface, and the amount of charge on the drum surface is controlled to be constant based on the result. (2) Configuration of the drum temperature detection circuit DRTH DRTMP- Drum thermstor Drum temperature detection circuit Fig. 11-401 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved - 7 e-STUDIO350/352/353/450/452/453 DRUM RELATED SECTION...
Page 210: Temperature/Humidity Sensor
11.5 Temperature/Humidity Sensor 11.5.1 General description This sensor measures the temperature and humidity inside the equipment. 11.5.2 Construction Temperature/humidity control circuit is configured as follows: HMS-A PC7/AN7 TEMP-A PC3/AN3 LGC board HUMI-THS Fig. 11-501 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 - DRUM RELATED SECTION...
Page 211: Disassembly And Replacement
2. Do not touch the drum surface. Fig. 11-602 Main charger (B-1) Main charger (1) Take off the cleaner unit ( Chapter 11.6 [A]). (2) Release the latch and pull out the main charger to the direction of the arrow. Note: Be careful not to touch or scratch the drum surface at this time. Fig. 11-603 (B-2) Main charger grid (1) Push the terminal head at the front side and remove the grid. Note: Do not touch the mesh area of the grid. Fig. 11-604 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved - e-STUDIO350/352/353/450/452/453 DRUM RELATED SECTION 04/01...
Page 212 (1) Take off each terminal cover of the front and rear sides. Fig. 11-605 (2) Remove the damper, terminal, spring and wire. Damper Wire Terminal Spring Fig. 11-606 (B-4) Charger wire cleaning pad (1) Release the charger wire cleaner shaft from the hooks of the charger wire cleaning pads. Fig. 11-607 (2) Remove the charger wire cleaning pads. Note: When installing, make sure that 2 charger wire cleaning pads are away from the wire while the charger wire cleaner shaft is at the rear side. Fig. 11-608 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 - 0 DRUM RELATED SECTION 06/03...
Page 213 [C] Drum (1) Pull out the cleaner unit and take off the main charger ( Chapter 11.6 [A] (B-1)). (2) Release the latch and remove the cleaner stay. Fig. 11-609 (3) Push the lever down to the left and release the lock. Then pull out the drum shaft. Fig. 11-610 (4) Lift up the drum and take it off. Fig. 11-611 (5) Remove 6 screws and take off 2 flywheels. Fig. 11-612 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved - e-STUDIO350/352/353/450/452/453 DRUM RELATED SECTION 07/02...
Page 214 3. Be careful not to touch or scratch the edge of cleaning blade. Fig. 11-613 [D] Cleaner (D-1) Cleaning blade (1) Take off the cleaner unit. Then take off the main charger and drum ( Chapter 11.6 [A] (B-1) [C]). (2) Remove 2 screws and cleaning blade. Fig. 11-614 Note: Pay attention to the following points when install- ing the cleaning blade. 1. Do not touch the end face of the cleaning blade and not make a scratch or similar. Cleaning blade 2. The cleaning blade should not contact with the seals. (2 places) 3. If it contacts, shift the screw from A to B and Seal adjust it so as not to contact with the seals. Fig. 11-615 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 - 2 DRUM RELATED SECTION 07/06...
Page 215 1. When replacing the separation fingers, make sure that the drum has been taken off first since the fingers may scratch the drum surface. 2. When the separation fingers have been re- placed, check if their pressure movement is Fig. 11-617 normal by moving them with your fingers. [E] Transfer / Separation charger (E-1) Transfer / Separation charger (1) Open the bypass tray, ADU and jam access cover. (2) Release the latches and take off the transfer and separation chargers. Note: When installing the transfer and separation char- gers, make sure not to deform the springs. Fig. 11-618 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved - 3 e-STUDIO350/352/353/450/452/453 DRUM RELATED SECTION...
Page 216 [F] Exhaust fan / Sub-separation fan (1) Open the jam access cover. (2) Take off the transfer and separation char- gers ( Chapter 11.6 (E-1)). (3) Remove 4 screws and disconnect 1 connec- tor. Then take off the fan cover. Fig. 11-621 (4) Remove 3 screws and 3 washers. Discon- nect 1 connector each from the exhaust fan and sub-separation fan. Then take off the exhaust fan and sub-separation fan. Note: When installing, pay attention to the direction of the wind from the fan. Fig. 11-622 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 - 4 DRUM RELATED SECTION...
Page 217 Fig. 11-624 [H] Toner bag full detection sensor (H-1) Toner bag full detection sensor-1 (1) Take off the rear cover ( Chapter 2.5.1 [C]). (2) Take off the registration clutch and gear unit Chapter 10.4 [B] [C]). (3) Disconnect 1 connector and remove 1 screw. Then take off the toner bag full detec- tion sensor-1 with the whole bracket. Fig. 11-625 (4) Disconnect 1 connector and take off the toner bag full detection sensor-1 from the bracket. Fig. 11-626 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved - 5 e-STUDIO350/352/353/450/452/453 DRUM RELATED SECTION...
Page 218 (2) Take off the SYS board with the whole case Chapter 2.5.2 [C]). (3) Disconnect 1 connector and release the har- ness from 1 harness clamp. (4) Remove 2 screws and take off the duct. Fig. 11-628 (5) Release the harness from 1 harness clamp. (6) Remove 1 screw and take off the duct cover. Fig. 11-629 (7) Take off the developer unit cooling fan-2. Developer unit cool- Note: ing fan-2 When installing, pay attention to the direction of the wind from the fan. Fig. 11-630 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 - DRUM RELATED SECTION...
Page 219 Note: When installing, pay attention to the direction of the wind from the fan. Fig. 11-632 (I-3) Developer unit cooling fan unit-1 (1) Take off the rear cover ( Chapter 2.5.1 [C]). (2) Take off the SYS board with the whole case Chapter 2.5.2 [C]). (3) Remove 1 screw and disconnect 1 connec- tor and take off the developer unit cooling fan unit-1. Fig. 11-633 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved - 7 e-STUDIO350/352/353/450/452/453 DRUM RELATED SECTION...
Page 220 Chapter 12.5 [I] [G]). (4) Remove 1 screw and take off the toner bag Toner cartridge cover holder. (5) Remove 2 screw and take off the toner car- tridge cover. (6) Take off the rear cover, SYS board case, developer unit cooling fan-2 and developer unit cooling fan unit-1 ( Chapters 2.5.1 [C], 2.5.2 [C] and 11.6 [I]). (7) Take off the registration clutch and gear unit Toner bag holder Chapter 10.4 [B] [C]). Fig. 11-634 (8) Remove 3 screws on the rear side. Fig. 11-635 (9) Remove 3 screws on the front side and release the harnesses from 3 harness clamps. (10) Take off the bracket of the toner cartridge. Fig. 11-636 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 - DRUM RELATED SECTION...
Page 221 (13) Disconnect 1 connector and remove 2 screws and take off the middle fan. Note: When installing, pay attention to the direction of the wind from the fan. Fig. 11-639 [K] Temperature / Humidity sensor (1) Open the front cover. (2) Take off the receiving tray ( Chapter 2.5.1 [H]). (3) Disconnect 1 connector and remove 1 screw. Then take off the temperature / hu- midity sensor with the whole cover. Fig. 11-640 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved - e-STUDIO350/352/353/450/452/453 DRUM RELATED SECTION...
Page 222 (4) Remove 1 screw and take off the tempera- ture / humidity sensor from the cover. Fig. 11-641 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 - 20 DRUM RELATED SECTION...
Page 223: Development System
12. DEVELOPMENT SYSTEM 12.1 Configuration Development system consists of the following unit, components and control circuits. Toner cartridge drive unit / Toner cartridge detection switch Temperature/humidity sensor ( chapter 11) • Developer unit Developer material Mixers -1 and -2 Developer sleeve (magnetic roller) Doctor blade Auto-toner sensor Drum thermistor ( chapter 11) Drum Drum thermistor Mixer-2 Doctor blade Developer sleeve Mixer-1 Auto-toner sensor [Sectional view of developer unit] Fig. 12-101 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 12 - 1 e-STUDIO350/352/353/450/452/453 DEVELOPMENT SYSTEM...
Page 224: Functions
12.2 Functions (1) Toner cartridge drive unit / Toner cartridge detection switch The toner cartridge is filled with toner. The toner motor drives the cartridge to supply the toner to the developer unit. The toner cartridge detection switch detects whether the toner cartridge is installed. (2) Developer unit (a) Developer material The developer material is made of a mixture of the carrier and toner. The carrier is an electrical conductive ferrite whose size is 30µm to 100µm. The toner is a resin particle whose size is 5µm to 20µm. The developer material needs periodic replacement since its quality is deteriorated by long use. (b) Mixers-1 and -2 Friction is generated by mixing the developer material. The carrier is charged to (+) and the toner to (–), and the image is formed on the drum surface by the static electricity caused by the friction. (c) Developer sleeve (Magnetic roller) This is an aluminum roller with a magnet inside. The magnet works to absorb the developer material and forms the magnetic brush. The magnet is fixed and only the sleeve around is rotated. This rotation makes the magnetic brush of the developer sleeve sweep over the drum surface and perform development. (d) Doctor blade Doctor blade controls the amount of the developer material transported by the developer sleeve so that the magnetic brush of the developer material contacts with the drum surface properly. (e) Auto-toner sensor The carrier and the toner (toner density) in the developer material should be always fixed to a certain ratio to output normal images. The auto-toner sensor detects the inclusion ratio of the toner in the developer material by using a magnetic bridge circuit. When the quantity of toner becomes insufficient, the toner motor is driven to supply the toner from the toner cartridge. e-STUDIO350/352/353/450/452/453 12 - 2 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved DEVELOPMENT SYSTEM...
Page 225: Drive Circuit Of Toner Motor
12.3 Drive Circuit of Toner Motor The toner motor (brush motor) is a motor to supply toner from the toner cartridge to the developer unit. The toner motor is driven by the transistor TA8428 (LGC board: IC51). Circuit diagram of the toner motor MAIN ASIC GA -CPU TD235 TA42 IC24 IC3 IC2 Toner motor IC5 Fig. 12-301 Motor driver TA8428 (IC51) is connected with both ends of the motor wire. — When the PC6 (TNRM1-1) of the ASIC GA becomes “H” and PC7 (TNRM2-1) becomes “L” levels, current flows into the motor wire and the motor is rotated. — When both of PC6 (TNRM1-1) and PC7 (TNRM2-1) of the ASIC GA become “H” level, the motor is braked and stopped. — When both of PC6 (TNRM1-1) and PC7 (TNRM2-1) of ASIC GA become “L” level, the motor waits for the next command (the motor is stopped). © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 12 - 3 e-STUDIO350/352/353/450/452/453 DEVELOPMENT SYSTEM...
Page 226: Auto-Toner Circuit
ASIC GA IC52 IC23 IC14 IC54 LGC board Toner cartridge Toner Toner motor Control ASIC GA voltage signal converter IC38 Engine Toner density signal IC24 Auto-toner sensor TA8428 Developer material IC51 Developer unit Fig. 12-401 e-STUDIO350/352/353/450/452/453 12 - 4 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved DEVELOPMENT SYSTEM 07/11...
Page 227: Function Of Auto-Toner Sensor
Automatically adjusts the output value of the auto-toner sensor responding to humidity (input value to the main CPU) for the toner density of the new developer material so that it stays in range of 2.35 to 2.45V. b. Stabilizing the toner density —During the printing operation Maintains the toner density to a certain ratio as follows. Toner is consumed. →The toner density is lowered. →Change in the auto-toner sensor output responding to humidity is detected. →The toner motor is driven. →Toner is supplied from the toner cartridge to the developer unit. c. Toner-empty detection and recovery: Detects that there is no toner in the toner cartridge: The toner motor is driven. →The auto-toner sensor output does not change. →The toner density does not change. →It is determined there is no toner in the cartridge (toner empty). Recovering from the toner-empty state: The toner motor is driven. →Toner is supplied from toner cartridge. →The auto-toner sensor output changes. →The toner density returns to normal value. →The toner-empty state is cleared. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 12 - 5 e-STUDIO350/352/353/450/452/453 DEVELOPMENT SYSTEM...
Page 228 Auto-toner output To the man Drve Detecton converson CPU ( LGC board ) wndng wndng crcut ( Developer materal ) Magnetc crcut Fig. 12-402 When the toner density is low— The ratio of the toner against the carrier in the developer material decreases. →The magnetic resistance decreases. →The detection output increases. →The auto-toner output V increases. When the toner density is high— The ratio of the toner against the carrier in the developer material increases. →The magnetic resistance increases. →The detection output decreases. →The auto-toner output V decreases. e-STUDIO350/352/353/450/452/453 12 - 6 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved DEVELOPMENT SYSTEM...
Page 229: Adjustment Using The Temperature / Humidity Sensor
12.4.3 Adjustment using the temperature / humidity sensor Variation in the output (V ) of the auto-toner sensor due to humidity is corrected using the tempera- ture / humidity sensor to maintain the toner density in the developer material at a certain amount. 12.4.4 Adjustment using the drum thermistor Variation in the output (V ) of the auto-toner sensor due to temperature is corrected using the drum thermistor to maintain the toner density in the developer material at a certain amount. Feedback control by drum thermistor in setting mode (08) Code Item to be controlled Default 08-840 Toner output control by drum thermistor © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 12 - 7 e-STUDIO350/352/353/450/452/453 DEVELOPMENT SYSTEM...
Page 230: Disassembly And Replacement
Fig. 12-501 (2) Disconnect 1 connector and loosen 1 screw. Fig. 12-502 (3) Take out the developer unit. Note: Developer sleeve Do not touch the developer sleeve on the top of the developer unit. Fig. 12-503 [B] Developer material (B-1) Discharge of developer material (1) Slide the upper cover of developer unit to the direction of the arrow and take off the cover by releasing the latches. Fig. 12-504 e-STUDIO350/352/353/450/452/453 12 - 8 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved DEVELOPMENT SYSTEM...
Page 231 (B-2) Filling developer unit with developer material (1) Install the developer nozzle jig on the devel- oper bottle. (2) Rotate the gear on the rear side of the developer unit to the direction of the arrow while filling the developer unit with the de- veloper material. Spread out the developer material over the developer sleeve. Fig. 12-506 Note: When installing the upper cover of developer unit, attach the latches securely. Fig. 12-507 [C] Guide roller Polarity adjustment lever (C-1) Front side (1) Discharge the developer material Chapter 12.5 (B-1)). (2) Make a note of the position where the polar- ity adjustment lever is pointing. (Mark the position if needed.) Scale Fig. 12-508 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 12 - 9 e-STUDIO350/352/353/450/452/453 DEVELOPMENT SYSTEM...
Page 232 (4) Disconnect 2 connectors. Fig. 12-509 (5) Remove 1 screw and take off the polarity adjustment lever. Guide roller (6) Remove 1 E-ring and take off the guide roller. Note: When reassembling, match the polarity adjust- ment lever with the previously marked position on Polarity adjustment lever the scale. Fig. 12-510 (C-2) Rear side (1) Remove 2 screws and take off the bracket. Fig. 12-511 (2) Remove 1 E-ring and 4 gears. (3) Take off the guide roller. Guide roller Fig. 12-512 e-STUDIO350/352/353/450/452/453 12 - 10 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved DEVELOPMENT SYSTEM...
Page 233 [D] Auto-toner sensor (1) Discharge the developer material Chapter 12.5 (B-1)). (2) Disconnect 1 connector on the bottom of the developer unit. (3) Remove 1 screw and take off the auto-toner sensor. Fig. 12-513 [E] Drum thermistor (1) Discharge the developer material Chapter 12.5 (B-1)). (2) Take off the front cover of developer unit Chapter 12.5 (C-1)). (3) Remove 2 screws and take off the developer sleeve cover. Fig. 12-514 (4) Remove 1 screw and take off the drum thermistor. Fig. 12-515 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 12 - 11 e-STUDIO350/352/353/450/452/453 DEVELOPMENT SYSTEM...
Page 234 [F] Developer sleeve (1) Discharge the developer material Chapter 12.5 (B-1)). (2) Take off the guide rollers (on both front and rear sides) ( Chapter 12.5 [C]). (3) Take off the developer sleeve cover Chapter 12.5 [E]). (4) Remove 2 screws. Lift up the shaft and take off the developer sleeve unit. Fig. 12-516 (5) Remove 4 screws and doctor blade. Fig. 12-517 (6) Take off the developer sleeve. Developer sleeve Fig. 12-518 (7) Replace the oil seal on the shaft on the de- veloper sleeve rear side, if necessary. *Replacement of Oil Seal ( Page 12-15) Oil seal Fig. 12-519 e-STUDIO350/352/353/450/452/453 12 - 12 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved DEVELOPMENT SYSTEM...
Page 235 (2) Take off the developer sleeve unit Chapter 12.5 [F]). (3) Take off the bushing on the front side. Oil seal *Replacement of Oil Seal ( Page 12-15) Bushing Fig. 12-521 (4) Remove 1 E-ring and 1 bushing. Then take off the mixer-1. Bushing Fig. 12-522 [H] Mixer-2 (1) Discharge the developer material Chapter 12.5 (B-1)). (2) Take off the developer sleeve unit Bushing Chapter 12.5 [F]). (3) Remove 1 E-ring and 1 bushing on the front side. (4) Remove 1 screw and holder. Holder Oil seal *Replacement of Oil Seal ( Page 12-15) Fig. 12-523 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 12 - 13 e-STUDIO350/352/353/450/452/453 DEVELOPMENT SYSTEM...
Page 236 Fig. 12-524 Toner cartridge drive unit (I-1) Toner cartridge drive unit (1) Take off the toner cartridge. (2) Take off the developer unit Chapter 12.5 [A]). (3) Take off the receiving tray Chapter 2.5.1[H]). (4) Take off the tray back cover Chapter 2.5.1 [I]). (5) Disconnect 1 connector and remove 1 har- ness clamp. (6) Remove 3 screws and take off the toner cartridge cover. Fig. 12-525 (7) Remove 2 screws and disconnect 2 connec- tors. Then take off the toner cartridge drive unit. Fig. 12-526 e-STUDIO350/352/353/450/452/453 12 - 14 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved DEVELOPMENT SYSTEM...
Page 237 (I-3) Toner cartridge detection switch (1) Take off the toner cartridge drive unit Chapter 12.5 (I-1)). (2) Remove 1 screw and take off the toner cartridge detection switch with the whole bracket. Fig. 12-528 (3) Remove 3 screws with a fine screwdriver and take off the toner cartridge detection switch and switch cover. Fig. 12-529 << Replacement of Oil Seal>> Insert a fine screwdriver into the depression of the oil seal to take it out. Outside Push in a new oil seal parallel to the frame Inside or bushing (shown figure at right). Grease Apply the grease (Alvania No.2; amount of 2 rice grains) on entire surface of the oil seal Oil seal evenly. Note: Wipe off the excessive grease. Fig. 12-530 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 12 - 15 e-STUDIO350/352/353/450/452/453 DEVELOPMENT SYSTEM...
Page 239: Fuser Unit / Paper Exit Section
Then the paper transported to the fuser unit is hold between the fuser roller and pressure roller and the toner is fused on the paper with heat and pressure. After this, the separation fingers separate the paper from the fuser roller or pressure roller. Then the paper is transported to the receiving tray, paper exiting options or ADU through the exit roller. In addition, the IH coil in the fuser roller does not structurally rotate. The thermistors control the temperature of fuser roller and detect temperature abnormalities. If the temperature becomes excessively high, the thermostat is opened to stop the power supply to the IH coil. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 13 - 1 e-STUDIO350/352/353/450/452/453 FUSER UNIT / PAPER EXIT SECTION...
Page 240: Functions
13.3 Functions (1) IH coil (IH: Induction Heating) The IH coil is inside the fuser roller and applies the induction heating to the fuser roller. The coil is fixed at a position and does not move when the fuser roller is rotating. (2) Fuser roller The fuser roller is a metal roller which generates heat spontaneously with eddy current produced by the electromagnetic induction of IH coil. The fuser roller is heated by this self-heating of this roller, and then the toner is fused on the paper. (3) Pressure roller The pressure roller is a sponge roller which assures the nip amount between the fuser roller. The pressure arm and spring press the fuser roller. The toner is fused effectively by the pressure of this roller. (4) Separation fingers The separation fingers are installed, five above the pressure roller and six above the fuser roller, in order to separate the paper adhered on each roller. (5) Cleaning roller The cleaning roller is a fluorinated metal roller which removes the residual toner and paper dust adhered on the pressure roller. (6) Main thermistor This thermistor detects the temperature of the fuser roller to maintain it in a certain temperature range (actually around 200°C) between the lower limit causing the poor fusing and the upper limit causing the high temperature offsetting. When the temperature of the fuser roller is lower than the preset temperature, it turns ON the power supply to the IH coil, and when it is higher than the preset temperature, it cuts off the supply. (7) Edge thermistor It detects the temperature abnormality at the both ends of the fuser roller. This area may be overheated without heat absorption by paper since paper does not pass through this area. This thermistor is not related to the temperature control of the fuser roller. e-STUDIO350/352/353/450/452/453 13 - 2 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved FUSER UNIT / PAPER EXIT SECTION...
Page 241 (8) Thermostat The thermostat cuts off the power supply to the IH coil by opening itself if the fuser roller becomes abnormally hot as a result of the problem such as thermistor malfunction. The thermostat for this equipment is used to prevent abnormal operation. When the thermostat detects any abnormality, it must be replaced as well as the other damaged parts in the fuser unit. (9) Exit sensor This sensor detects the arrival of the leading or trailing edge of the paper at the exit roller of the fuser unit. It also detects paper jams in the fuser unit paper exit area and trailing edge of paper turned over for duplex printing. (10) Exit motor The exit motor is a stepping motor which drives the exit roller and bridge unit. (11) Exit roller This roller transports the paper from the fusing section to the receiving tray, paper exiting options or the ADU and is driven by the exit motor. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 13 - 3 e-STUDIO350/352/353/450/452/453 FUSER UNIT / PAPER EXIT SECTION...
Page 242: Heater Control Circuit
13.4 Heater Control Circuit 13.4.1 Configuration Fig. 13-401 e-STUDIO350/352/353/450/452/453 13 - 4 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved FUSER UNIT / PAPER EXIT SECTION...
Page 243: Heating Principle Of Ih Heater
Fuser roller IH col Smoothng crcut ( IGBT ) IGBT drve Current nput Montorng nput current Voltage nput I/F crcut on LGC board Montorng nput current [ Block dagram of hgh frequency power supply ] Fig. 13-403 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 13 - 5 e-STUDIO350/352/353/450/452/453 FUSER UNIT / PAPER EXIT SECTION...
Page 244: Ih Control Circuit Interface
CN455-5 H1PWR3 Switching signal of power setting CN455-6 H2PWR1 CN455-7 H2PWR2 CN455-8 H2PWR3 CN456-1 IH1 ON IH coil energization permitting signal LGC to IH CN456-2 CN456-3 Not connected CN456-4 H1ERR1 IH to LGC IH status signal (*Note) CN456-5 H1ERR2 (*Note) IH status signal • When the temperature (due to insufficient cooling) of the switching element (IGBT) is abnormal: “10: Coil is abnormal, IH FAN OFF” → After a certain period of time → Error [C480] • When the upper limit of the power voltage is abnormal: “00: Initializing” → After a certain period of time → Error [C470] • When the lower limit of the power voltage is abnormal: “00: Initializing” → After a certain period of time → Error [C470] • Defective circuits → : “11: Abnormal circuit, IH coil abnormality” → Error [C490] • Ready state after the initialization: “01: Ready” e-STUDIO350/352/353/450/452/453 13 - 6 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved FUSER UNIT / PAPER EXIT SECTION...
Page 245: Relation Between System Configuration And Ih Output
Energy Saving Automatically (*2) System configuration Warming up Ready Printing Mode Equipment only 1300-1200W Equipment and RADF (*1) (*1) Equipment, RADF and FIN 1280-1180W (*1) Equipment, RADF 700W 980W FIN, and HPU (*1) Equipment, RADF FIN, HPU and LCF (*1) 1260-1160W Equipment, RADF FIN, HPU, LCF and * RADF: Reversing Automatic Document Feeder, FIN: Finisher, HPU: Hole Punch Unit, LCF: Large Capacity Feeder, FAX: FAX unit (*1) The wattage lowers 50 W more when the scanning is performed from the RADF during warming up. (*2) AC power should be input voltage when the equipment is warming up (The lower the voltage is, the longer the warming up time becomes). © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 13 - 7 e-STUDIO350/352/353/450/452/453 FUSER UNIT / PAPER EXIT SECTION 07/11...
Page 246: Temperature Detection Section
Approx. 2.0 Approx. 3.5 Approx. 4.0 (2) Control of the surface temperature of the fuser belt Warmng-up Ready ( 200°C ) Durng prntng ( 200°C ) °C Temperature of fuser roller IH col ON ON OFF ON OFF Fig. 13-404 (3) Temperature control for the both ends of the fuser roller During the continuous printing, the temperature of the both ends of the fuser belt (areas where the paper does not pass on) generally tend to be higher than that of the other areas (areas where the paper passes on). The temperature of the ends are detected by the front edge thermistor, and when it reaches 280°C, the heater is automatically turned OFF regardless of the temperature of the area where the paper passes on. e-STUDIO350/352/353/450/452/453 13 - 8 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved FUSER UNIT / PAPER EXIT SECTION...
Page 247 Auto Power Save Mode Fxed tme ( 0-205 ) ( IH col OFF ) Warmng-up Ready Durng prntng Auto °C Shut Off Mode Fxed tme ( 0-20 ) Temperature of fuser roller IH col ON Fig. 13-405 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 13 - 9 e-STUDIO350/352/353/450/452/453 FUSER UNIT / PAPER EXIT SECTION...
Page 248: Thermistor/Heater Status Counter Control
• To enhance the safety of the fusing section unit, CPU provides the following protection: When the third [C410] error has occurred after two consecutive [C410] errors, the IH coil is not turned ON and error [C410] is displayed immediately even if an operator turns OFF the power and back ON. However, if the equipment goes into a ready state normally with the thermistor/heater status counter “1” or below, the counter is cleared to “0”. • If the error codes [C410] to [C450] are displayed and still not cleared even though the thermis- tor, thermostat and IH coil have been repaired (and the power ON/OFF does not clear the er- Reference *The thermistor/heater status counter never has values other than 0-18. • If the IH coil does not turn ON and the service call [C410] is displayed immediately after the power is ON, ensure the thermistor/heater status counter is “2” or over. If it is “2” or over, be sure to check the thermistor, thermostat and IH coil. Reset the counter to “0” (Setting Mode (08-400)) after repairing them, then turn ON the power. • If the thermistor/heater status counter is “19” or over (e.g., 21), the data in NVRAM or NVRAM itself may possibly have been ruined due to causes such as leakage from the char- gers. Check the bias, high-voltage transformers and charge wires to see if any of them is defective, and also look through all the data in the NVRAM. • When the thermistors detect overheating, the CPU decides the error code and counter value of the fuser roller thermistor status. After turning OFF each output (the IH coil, exposure lamp, control panel display, motors and so on), the CPU turns OFF the power to protect the fuser unit. Error code: C440 ([C] and [8]) Counter value of the fuser roller thermistor status: 9 (08-400) Thermistors continue detecting the abnormal temperature even after the error codes and counter values are decided. Even if the power is turned ON immediately, it is automatically turned OFF again when the surface temperature of the fuser roller is still higher than the abnormal temperature detected. Wait until the surface temperature of the fuser roller is lowered enough, and turn ON the power to check the counter value while it is turned OFF again. After confirming that it is the IH control abnormality, correct the abnormality and clear the counter value (08-400) to "0" to start up the equipment normally. e-STUDIO350/352/353/450/452/453 13 - 10 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved FUSER UNIT / PAPER EXIT SECTION...
Page 249 (6) Temperature detection configuration Thermistor is a device whose resistance decreases as it detects a higher temperature. Thus its input voltage to CPU changes and then CPU judges whether this change is normal or abnormal. If one of the fuser roller thermistors is broken, the control circuit judges that the fuser roller tem- perature is extremely low and keeps turning the IH coil ON. As a result, the fuser roller tempera- ture rises, and possibly activates the thermostat which is a safety protection device. To prevent this in advance, CPU works to detect whether each thermistor is broken or not. Also, the thermistors constantly check the temperature of IH coil to prevent it from excessive heating by IH circuit abnormality, LGC circuit abnormality or thermistor abnormality. The therm- istors automatically turn OFF the power when the temperature of IH coil exceeds the specified temperature. Man thermstor PC4/AN4 Edge thermstor PC/AN Fig. 13-406 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 13 - 11 e-STUDIO350/352/353/450/452/453 FUSER UNIT / PAPER EXIT SECTION...
Page 250 Detecting Fixed time C440 160°C 160°C or below 230°C or above 280°C or above Detecting ready Fixed time C440 Ready temp. or below temperature During ready 230°C or above 280°C or above status On usual C440 40°C or below At Energy Saving Mode 230°C or above 280°C or above C440 During printing 40°C or below On usual C450 At paper jam 230°C or above 40°C or below On usual C440 * The figures in the “condition” section denote the priority of error checking. e-STUDIO350/352/353/450/452/453 13 - 12 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved FUSER UNIT / PAPER EXIT SECTION...
Page 251: Abnormality In The Ih Control Circuit
13.4.6 Abnormality in the IH control circuit When an abnormality is detected in the IH control circuit, it stops the power supply to the IH coil and displays a message “call for service”. (1) IH control circuit CPU output level of the IH control circuit changes depending on the condition of IH coil. This out- put level goes through the photocoupler into the gate array. LGC board IH board 5V SW Engine CPU H1ERR1 H1ERR2 Fig. 13-407 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 13 - 13 e-STUDIO350/352/353/450/452/453 FUSER UNIT / PAPER EXIT SECTION 05/11...
Page 252 C490 IH power voltage abnormality C470 In warming up IGBT high temperature abnormality Detecting 40°C C480 Continuous energization (15 sec.) During ready status IH circuit/coil abnormality C490 IH power voltage abnormality C470 During ready status IGBT high temperature abnormality C480 During printing Continuous energization (15 sec.) At Energy Saving IH circuit/coil abnormality C490 Mode Normal (2) IH error Initial abnormality: CPU (IH) abnormality is not cleared. IH power voltage abnormality: The input voltage becomes above 20% (approx.) or below 20% (approx.) of the rated voltage. IGBT high temperature abnormality: Overheating of IGBT or short- or open-circuit of IGBT temperature-detecting sensor. IH circuit abnormality: Abnormality in IH circuit IH coil abnormality: Temperature-detecting sensor in IH circuit is abnormal, or IH coil is open-circuited or wrongly in- stalled. e-STUDIO350/352/353/450/452/453 13 - 14 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved FUSER UNIT / PAPER EXIT SECTION...
Page 253: Control Circuit Of Exit Motor
LGC board EXTMA-0 PG10 EXTMA EXTMB-0 PG11 EXTMC EXTMC-0 PG12 EXTMB EXTMD-0 PG13 EXTMD Engine CPU Exit Motor VREF STK672 Fig. 13-501 13.6 Exit Motor Drive The diagram shown below is the layout of the driving gears of the exit roller. Ext motor Ext roller ( ø5 ) Fig. 13-601 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 13 - 15 e-STUDIO350/352/353/450/452/453 FUSER UNIT / PAPER EXIT SECTION 05/11...
Page 254: Disassembly And Replacement
(3) Release the harness from 1 harness clamp. Fig. 13-701 (4) Close the fuser unit cover. (5) Remove 2 screws and take off the fuser unit. Notes: 1. Make sure to hold the plastic part of the faston terminals when disconnecting them. 2. Be careful not to connect each terminal to the wrong position. Screw Fig. 13-702 [B] Fuser unit cooling fan (1) Take off the fuser unit ( Chapter 13.7 [A]). (2) Take off the fuser unit cover by pushing it to the right. Fig. 13-703 (3) Remove 2 screws and take off the fuser unit cooling fan unit. Fig. 13-704 e-STUDIO350/352/353/450/452/453 13 - 16 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved FUSER UNIT / PAPER EXIT SECTION...
Page 255 (6) Remove 4 screws and take off the fuser unit cooling fan. Fig. 13-705 [C] Exit sensor (1) Take off the fuser unit ( Chapter 13.7 [A]). (2) Release 2 latches of the exit sensor cover and take off the exit sensor cover. Fig. 13-706 (3) Release 3 latches of the exit sensor and disconnect 1 connector while taking out the exit sensor. Fig. 13-707 [D] Exit finger (1) Take off the fuser unit ( Chapter 13.7 [A]). (2) Open the fuser unit cover and transport guide. (3) Pull out the shaft from both ends of transport guide and take off 8 exit fingers. Fig. 13-708 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 13 - 17 e-STUDIO350/352/353/450/452/453 FUSER UNIT / PAPER EXIT SECTION...
Page 256 Stepped screw (1) Take off the fuser unit ( Chapter 13.7 [A]). (2) Open the fuser unit cover and transport guide. (3) Remove 2 screws (one on the front side is a stepped screw) and take off the paper exit unit. Fig. 13-710 (4) Remove 6 springs and take off 6 separation fingers for fuser roller. Fig. 13-711 [G] Cleaning roller (1) Take off the fuser unit ( Chapter 13.7 [A]). (2) Take off the fuser unit cover ( Chapter 13.7 [B]). (3) Release the harness from the harness guide of the cover on the rear side. (4) Remove 1 screw and take off the cover on the rear side. Fig. 13-712 e-STUDIO350/352/353/450/452/453 13 - 18 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved FUSER UNIT / PAPER EXIT SECTION...
Page 257 (5) Remove 2 screws on the rear side. Fig. 13-713 (6) Remove 2 screws on the front side. Fig. 13-714 (7) Take off the transport guide. Fig. 13-715 (8) Take off the cleaning unit. Fig. 13-716 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 13 - 19 e-STUDIO350/352/353/450/452/453 FUSER UNIT / PAPER EXIT SECTION...
Page 258 Fig. 13-717 [H] Pressure roller (1) Take off the cleaning unit ( Chapter 13.7 [G]). (2) Remove the pressure springs on both front and rear sides. (3) Pull out the pressure lever units on both left and right sides. Fig. 13-718 (4) Take out the pressure roller. Fig. 13-719 IH coil (1) Take off the fuser unit ( Chapter 13.7 [A]). (2) Take off the fuser unit cover Chapter 13.7 [B]). (3) Release the harness from the harness guide of the cover on the rear side. (4) Remove 1 screw and take off the cover on the rear side. Fig. 13-720 e-STUDIO350/352/353/450/452/453 13 - 20 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved FUSER UNIT / PAPER EXIT SECTION...
Page 259 (6) Pull out the IH coil from the rear side. Fig. 13-722 [J] Fuser roller Gear A (1) Take off the fuser unit cover Chapter 13.7 [B]). (2) Take off the paper exit unit Chapter 13.7 [F]). (3) Take off the IH coil ( Chapter 13.7 [I]). C-ring (4) Push down the pressure levers on both sides. Bushing Pressure (5) Remove the E-ring and gear A on the rear lever Gear side. After that, remove C-ring, gear and Fig. 13-723 bushing in order. (6) Remove 2 screws and take off the coil holder on the front side. Fig. 13-724 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 13 - 21 e-STUDIO350/352/353/450/452/453 FUSER UNIT / PAPER EXIT SECTION...
Page 260 2. Be careful of the installation direction of the gear (the direction of the protrusion Inner side inside the gear). (Bushing side) Protrusion 3. Make sure not to scratch the fuser roller. Fig. 13-726 Lay the fuser roller on the clean place and prevent the fuser roller from dust. 4. When the fuser roller has been replaced, make sure to clean the separation fingers for the fuser roller. [K] Thermistor (1) Take off the fuser roller ( Chapter 13.7 [J]). (2) Release the harnesses from 4 harness clamps. (3) Remove 1 screw for each thermistor. Then take off the main thermistor and edge therm- istor. Note: Fig. 13-727 When installing, be careful not to deform the thermistors or the frame (plate). e-STUDIO350/352/353/450/452/453 13 - 22 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved FUSER UNIT / PAPER EXIT SECTION...
Page 261 1. Make sure to fix the thermostat, and then Screw A harness terminal in order on the holder. 2. Make sure that the fuser roller is pressed to the pressure roller when adjusting the gap between the fuser roller and thermostat with the screw A to be 1.5 mm to 1.9 mm. Fig. 13-730 [M] IH control PC board (IH board) (M-1) IH board (1) Take off the IH terminal cover Chapters 2.5.1 [L]). (2) Take off the right rear cover Chapter 2.5.1 [P]). (3) Take off the SYS board with the whole case Chapter 2.5.2 [C]). (4) Remove 3 screws and take off the IH board Fig. 13-731 cover. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 13 - 23 e-STUDIO350/352/353/450/452/453 FUSER UNIT / PAPER EXIT SECTION...
Page 262 (M-2) IH board unit (1) Take off the IH terminal cover. Disconnect 1 connector with lock and 2 faston terminals Chapters 2.5.1 [L] and 13.7 [A]). (2) Take off the right rear cover Chapter 2.5.1 [P]). (3) Take off the SYS board with the whole case Chapter 2.5.2 [C]). (4) Take off the IH board cover Chapter 13.7 (M-1)). (5) Disconnect 3 connectors and remove 2 screws, and then take off the IH board with the whole bracket. Fig. 13-733 [N] IH board cooling fan (1) Take off the IH control PC board with the whole bracket ( Chapter 13.7 (M-2)). (2) Remove 1 screw and take off the fan cover. Fig. 13-734 e-STUDIO350/352/353/450/452/453 13 - 24 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved FUSER UNIT / PAPER EXIT SECTION...
Page 263 (1) Take off the fuser unit ( Chapter 13.7 [A]). (2) Take off the IH control PC board with the whole bracket ( Chapter 13.7 (M-2)). (3) Remove 2 screws and disconnect 1 connec- tor and take off the exit motor. Fig. 13-736 [P] Exit roller (1) Take off the fuser unit ( Chapter 13.7 [A]). (2) Open the fuser unit cover and transport guide. (3) Remove 1 spring. Then remove E-ring (small), gear unit and gear in order. Fig. 13-737 (4) Release the spring force (2 springs) of the lower exit roller. (5) Remove E-rings and bushings on both sides Metal bushing (metal bushing on front side) and take off Spring the upper exit roller. Fig. 13-738 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 13 - 25 e-STUDIO350/352/353/450/452/453 FUSER UNIT / PAPER EXIT SECTION...
Page 265: Automatic Duplexing Unit (Adu)
The Automatic Duplexing Unit (ADU) is a unit to automatically print on both sides of paper. A switch- back method using the exit roller is adopted for the ADU of this equipment. A sheet of paper is switchbacked by the exit roller right after the printing operation (fusing operation) on one side is completed, and the reversed sheet is transported to the registration section for the other side of the sheet to be printed. The ADU mainly consists of the transport rollers and their drive system, paper guide and ADU en- trance/exit sensor. Upper transport roller Entrance guide ADU entrance sensor Paper guide Middle transport roller ADU motor ADU exit sensor Exit guide Lower transport roller Fig. 14-101 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - e-STUDIO350/352/353/450/452/453 AUTOMATIC DUPLEXING UNIT...
Page 266: Description Of Operations
14.2 Description of Operations The back side printing (recording data of the back side of paper) is performed first by selecting duplex printing mode and pressing the [START] button. When the trailing edge of the paper passes the exit gate, the paper is switchbacked by the exit roller and transported into the ADU (the exit gate is closed with its own weight), and then the switchbacked paper is transported with acceleration. The transporta- tion decelerates in front of the upper transport roller of the ADU. The front side printing (recording data of the front side of paper) is performed at the registration section. The paper passes through the exit gate again and is transported to the receiving tray to complete duplex printing. There are three methods of judging a paper jam: (1) whether the ADU entrance sensor is turned ON or not in a specified period of time after the switchback to the ADU started (E510). (2) whether the ADU exit sensor is turned ON or not in a specified period of time after the ADU entrance sensor is turned ON (E520). (3) whether the registration switch is turned ON or not in a specified period of time after the paper feeding from the ADU to the equipment (E110). If the ADU is opened during duplex printing, the ADU motor and ADU clutch are stopped, namely, ADU open jam occurs (E430). The equipment is never to be stopped during printing by interruption in any case except paper jam or service call. The operation of the duplex printing differs depending on the size of the paper; single-paper circulation and alternateness circulation. The figures in the following pages show the circulating operations during duplex copying. The numbers in the figures indicate the page numbers. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 4 - 2 AUTOMATIC DUPLEXING UNIT...
Page 268 Back sde of the st sheet → Back sde of the 2nd sheet → Front sde of the st sheet → Front sde of the 2nd sheet ( ) ( 2 ) ( 3 ) ( 4 ) ( 5 ) ( ) ( 7 ) ( ) Fig. 14-202 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 4 - 4 AUTOMATIC DUPLEXING UNIT...
Page 272: Drive Of Adu
14.3 Drive of ADU When the ADU motor rotates to the direction A, the upper transport roller is rotated driven by the gears and belt. The ADU clutch is then turned ON and the middle transport roller and lower transport roller are rotated. Upper transport roller ADU motor Middle transport roller ADU clutch Lower transport roller Fig. 14-301 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 4 - AUTOMATIC DUPLEXING UNIT...
Page 273: Flow Chart
ON the ADU ext sensor? ADU motor ON ADU motor stopped ADU clutch ON ADU ext sensor check the arrval ADU transport jam ( E520 ) Specfed tme has passed Fig. 14-401 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - e-STUDIO350/352/353/450/452/453 AUTOMATIC DUPLEXING UNIT...
Page 274 ADU feedng operaton started Regstraton sensor ON? ADU msfeedng ( E0 ) Regstraton n process Regstraton process completed ADU motor stopped ADU clutch OFF Next paper s ready for the regstraton Fig. 14-402 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 4 - 0 AUTOMATIC DUPLEXING UNIT...
Page 275: Disassembly And Replacement
14.5 Disassembly and Replacement [A] ADU (1) Take off the upper and lower drawers. Fig. 14-501 (2) Remove 2 screws and take off the right front hinge cover. Right front hinge cover Screw Fig. 14-502 (3) Remove 2 screws and take off the right rear hinge cover. Right rear hinge cover Screw Fig. 14-503 (4) Remove 2 screws and take off the right lower cover. Right lower cover Screw Fig. 14-504 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - e-STUDIO350/352/353/450/452/453 AUTOMATIC DUPLEXING UNIT...
Page 276 Fig. 14-505 (6) Remove the snap pin and slide ADU to the rear side to take it off. Snap pin Fig. 14-506 Note: Tape Since the jam access cover of the e-STUDIO352/353/452/453 does not lock, be sure to fix it temporarily with adhesive tape or such before taking off the ADU. Fig. 14-507 [B] ADU inside rear cover Screw (1) Take off the ADU ( Chapter 14.5 [A]). ADU inside (2) Remove 2 screws and take off the ADU rear cover inside rear cover. Fig. 14-508 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 4 - 2 AUTOMATIC DUPLEXING UNIT 07/11...
Page 277 Fig. 14-510 [E] ADU cover Screw Screw (1) Take off the ADU, ADU inside rear cover, ADU opening / closing switch, and paper guide ( Chapter 14.5 [A] to 14.5 [D]). (2) Remove 4 screws and take off the ADU cover. ADU cover Fig. 14-511 [F] Rear latch (1) Take off the ADU, ADU inside rear cover, ADU opening / closing switch, paper guide, Spring and ADU cover ( Chapter 14.5 [A] to 14.5 [E]). (2) Remove the spring. Fig. 14-512 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - 3 e-STUDIO350/352/353/450/452/453 AUTOMATIC DUPLEXING UNIT...
Page 278 /closing lever. Screw Opening / Closing lever Fig. 14-514 [H] ADU entrance sensor, ADU exit sensor ADU entrance sensor Connector (1) Take off the ADU, ADU inside rear cover, ADU opening / closing switch, paper guide, and ADU cover ( Chapter 14.5 [A] to 14.5 [E]). (2) Disconnect the connector and release the latch to take off the ADU entrance sensor. Fig. 14-515 (3) Disconnect the connector and release the latch to take off the ADU exit sensor. Connector ADU exit sensor Fig. 14-516 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 4 - 4 AUTOMATIC DUPLEXING UNIT...
Page 279 (4) Lift the ADU motor slightly and shift it to the direction of the arrow to take it off. ADU motor Screw Fig. 14-519 [K] ADU gear unit (1) Take off the ADU, ADU inside rear cover, ADU opening / closing switch, paper guide, and ADU cover ( Chapter 14.5 [A] to 14.5 [E]). (2) Take off the ADU motor ( Chapter 14.5 [J]). (3) Remove 3 screws and take off the ADU gear unit. Screw Note: ADU gear unit Match the protrusion of clutch with the posi- Fig. 14-520 tion shown in the figure when assembling. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - 5 e-STUDIO350/352/353/450/452/453 AUTOMATIC DUPLEXING UNIT...
Page 280 (5) Disconnect 1 connector. Fig. 14-521 (6) Loosen 1 setscrew and take off the ADU Setscrew clutch. ADU clutch Fig. 14-522 [M] Upper transport roller (1) Take off the ADU, ADU inside rear cover , ADU opening / closing switch, paper guide, and ADU cover ( Chapter 14.5 [A] to 14.5 [E]). (2) Remove 2 screws and take off the opening Screw /closing lever. Opening /Closing lever Fig. 14-523 (3) Remove the spring. Spring Fig. 14-524 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 4 - AUTOMATIC DUPLEXING UNIT...
Page 281 (4) Remove the screw and release the rear latch. Screw Rear latch Fig. 14-525 (5) Remove 4 screws and take off the bracket. Screw Bracket Fig. 14-526 (6) Remove the clip, pulley, pin and belt on the rear side. Pulley Belt Clip Fig. 14-527 (7) Remove the clip on the front side. Upper transport roller (8) Remove 2 bushings and take off the upper Bushing transport roller. Clip Bushing Fig. 14-528 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - 7 e-STUDIO350/352/353/450/452/453 AUTOMATIC DUPLEXING UNIT...
Page 282 (1) Take off the ADU, ADU inside rear cover, ADU opening / closing switch, paper guide, and ADU cover ( Chapter 14.5 [A] to 14.5 [E]). (2) Take off the ADU board. ADU board Fig. 14-529 (3) Remove the clip, pulley, pin and belt on the front side. Belt Clip Pulley Fig. 14-530 (4) Remove the clip on the rear side. Clip Fig. 14-531 (5) Remove 2 bushings and take off the middle Bushing Middle transport roller transport roller. Bushing Fig. 14-532 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO350/352/353/450/452/453 4 - AUTOMATIC DUPLEXING UNIT...
Page 283 Fig. 14-533 (4) Remove the clip, pulley, belt and pin on the front side. Belt Clip Pulley Fig. 14-534 (5) Remove 2 bushing and take off the lower Bushing Lower transport roller transport roller. Bushing Fig. 14-535 (6) Remove 4 E-rings and take off 2 rollers. E-ring Roller E-ring Notes: 1. The roller has a one-way clutch inside. Roller When installing rollers, pay attention to the E-ring rotation direction. 2. Replace 2 rollers at a time. Fig. 14-536 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 4 - e-STUDIO350/352/353/450/452/453 AUTOMATIC DUPLEXING UNIT...
Page 285: Power Supply Unit
: Power supply used in the entire equipment during image forming process. Five kinds of voltage (+3.3V, +5.1V, +12V, –12V* and +24V*) are output when the main switch of the equipment is turned ON. *: e-STUDIO350/450 only b. Door switch line : Power supply used in the entire equipment during image forming process, being supplied via the door switch. Two kinds of voltage (+5.1VD and +24VD) are output only when the main switch of the equipment is turned ON and two doors (front cover and jam access cover) are closed. 15.2 Operation of DC Output Circuits (1) Starting line output When the main switch of the equipment is turned ON, power starts supplying to all the lines only when two doors (front cover and jam access cover) are closed. (2) Stopping line output When the main switch of the equipment is turned OFF, PWR-DN signal is output after the instan- taneous outage insurance time (20 ms or more) elapses and then the supply of each voltage stops. If the supply of voltage of the main line (+3.3VA, +5.1VA, +12VA, -12VA) stops earlier than the 24V line does, it may cause the damage of the electron device on each control circuit. To pre- vent this, the supply of these voltages stops after the PWR-DN signal is output and the minimum retaining time (+3.3VA/+5.1VA: 50 ms or more, +12VA/-12VA: 5 ms or more) elapses. (3) Output protection Each output system includes an overcurrent and overvoltage protection circuits (a fuse and in- ternal protection circuit). This is to prevent the defectives (damage or abnormal operation of the secondary circuit) which may be caused by an overcurrent due to a short circuit or an overvoltage due to a short circuit between different voltages. If the protection circuit is activated (except the case the fuse is blown out), remove the causes such as short-circuit. Turn ON the power again 1 minute later to clear the overcurrent protection. © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 15 - 1 e-STUDIO350/352/353/450/452/453 POWER SUPPLY UNIT 05/11...
Page 286: Output Channel
Output to the SYS board +12VB : CN412 Pin 5 Output to the SYS board +12VB : CN413 Pin 7 Output to the LGC board +12VB : CN415 Pin 15 Output to the SLG board (4) -12V (e-STUDIO350/450 only) -12VA : CN412 Pin 9 Output to the SYS board -12VB : CN412 Pin 3 Output to the SYS board (5) +24V (e-STUDIO350/450 only) +24VB : CN413 Pin 13 Output to the FAX board e-STUDIO350/352/353/450/452/453 15 - 2 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved POWER SUPPLY UNIT 05/11...
Page 287 Pins 1 and 2 Output to the RADF +24VD4 : CN415 Pins 9 and 10 Output to the SLG board +24VD5 : CN416 Pin 3 Output to the finisher <<Output connector>> Not linked with the door switch CN412 F or the SYS board CN413 For the LGC board, FIL board / FUS board, FAX board (e-STUDIO350/450 only), PFP/LCF (via LCG board), Bridge unit / Job separator / Offset tray (via LGC board) CN415 For the SLG board, RADF CN416 For the finisher Linked with the door switch CN414 For the LGC board, PFP/LCF (via LGC board), Bridge unit / Job separator / Offset tray (via LGC board) CN415 For the SLG board, RADF CN416 For the finisher CN418 For the power supply cooling fan © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 15 - 3 e-STUDIO350/352/353/450/452/453 POWER SUPPLY UNIT 05/11...
Page 288: Fuse
ADU clutch Transport clutch (High speed) Transport clutch (Low speed) Bypass pickup solenoid Power supply Power supply cooling fan PFP/LCF +24VD2 Exit motor F4: 8A (Semi time-lag) Main motor Toner motor Middle fan Exhaust fan Sub-separation fan Fuser unit cooling fan IH board cooling fan Developer unit cooling fan-1 Developer unit cooling fan-2 Auto-toner sensor Registration clutch Developer drive clutch Discharge LED Key copy counter / Copy key card Bridge unit / Job separator / Offset tray +24VD3 RADF F5: 4A (Semi time-lag) +24VD4 Scan motor F6: 4A (Semi time-lag) Exposure lamp (Lamp inverter) +24VD5 Finisher F7: 5A (Semi time-lag) e-STUDIO350/352/353/450/452/453 15 - 4 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved POWER SUPPLY UNIT 05/11...
Page 289: Configuration Of Power Supply Unit
15.5 Configuration of Power Supply Unit © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 15 - 5 e-STUDIO350/352/353/450/452/453 POWER SUPPLY UNIT 05/11...
Page 290: Sequence Of Power Supply
+12VA, -12VA* 11.4V or higher 11.4V or (Linked with main switch) higher 200ms or lower 0ms or 0ms or higher higher PWR-EN 0ms or 200ms or lower higher +3.3VB (Linked with main switch) 3.2V or higher +5.1VB (Linked with main switch) 4.95V or 0 ms to higher 200ms +5.1VD (Linked with door switch) +12VB, -12VB* (Linked with main switch) +24VB* (Linked with main switch) +24VD (Linked with door switch) Lower limit of each rated voltage or higher +4.95V (R.V. +5.1V) +11.4V (R.V. +12V) -11.4V (R.V. -12V) -21.6V (R.V.+24V) *: e-STUDIO350/450 only e-STUDIO350/352/353/450/452/453 15 - 6 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved POWER SUPPLY UNIT 05/11...
Page 291: Ac Wire Harness
15.7 AC Wire Harness +5.1VB CN495 CN494 CN493 LOAD J653 +5.1VB J582 CN431 © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 15 - 7 e-STUDIO350/352/353/450/452/453 POWER SUPPLY UNIT 05/11...
Page 299 (10) PWA-F-KEY e-STUDIO350/450 e-STUDIO352/353/452/453 (11) PWA-F-FIL (* NAD/SAD/TWD models: Standard) © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved - 7 e-STUDIO350/352/353/450/452/453 PC BOARDS 07/11...

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E-studio452 E-studio450 E-studio353 E-studio350 E-studio352 E-studio 350 ... Show all

Toshiba e-STUDIO453 Service Manual

1 Specifications / Accessories / Options / Supplies

2 Outline of the Machine

3 Copy Process

4 General Operation

5 Control Panel

6 Scanner

7 Image Processing

8 Laser Optical Unit

9 Paper Feeding System

10 Drive System

11 Drum Related Section

12 Development System

13 Fuser Unit / Paper Exit Section

14 Automatic Duplexing Unit (Adu)

15 Power Supply Unit

16 Pc Boards

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SERVICE MANUAL

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