Page 1 RICOH PRIPORT VT 2000 SERIES (VT2100/2130/2150/2300/2500) SERVICE MANUAL...
Page 2: Overall Machine Information
SECTION 1 OVERALL MACHINE INFORMATION...
Page 3: Specifications
28 February ’91 1. SPECIFICATIONS VT2300/VT2500 Configuration: Desktop Master processing: Digital Printing process: Full automatic one drum stencil system Original type: Sheet Original size: Maximum 307 mm x 432 mm (12.0" x 17.0") Minimum 90 mm x 140 mm (3.6" x 5.5") Reproduction ratios: 3 Enlargement and 3 Reduction LT Version...
Page 4 28 February ’91 First print time: 34.5 seconds (B4 size) 31.5 seconds (A4 Size) Paper feed table 1000 sheets (66.3 g/m /17.6 lb) capacity: Paper delivery table 500 sheets (66.3 g/m / 17.6 lb) capacity: Power source: 110V, 60 Hz ..... 6.0A 120 V, 60 Hz ....
Page 5 28 February ’91 Feed table side plate 88 mm to 330 mm (3.46" to 12.99") width settings: Paper feed roller Normal position ....250 g pressure: Thick paper position..550 g Separation roller Normal position ....180 g pressure: Weak position ....70 g ±...
Page 6 28 February ’91 VT2100 Series (VT2100, VT2130, VT2150) Configuration: Desk top Master processing: Digital Printing process: Full automatic one drum stencil system Original type: Sheet Original size: Maximum 307 mm x 432 mm (12.0" x 17.0") Reproduction ratios: LT version: 100 %, 93 %, 75 %, 64 % A4 version: 100 %, 93 %, 82 %, 71 % Image mode: Line/Photo...
Page 7 28 February ’91 Paper feed table capacity 1000 sheets (66.3 g/m / 17.6 lb) Paper delivery table 500 sheets (66.3 g/m / 17.6 lb) capacity: Power source: 220/240V, 50/60 Hz ..2.7A 120V, 60 Hz ..... 5.5 A 110V, 60 Hz ..... 6.0 A Power consumption: 110/120 V version: 430 W 220/240 V version: 470 W...
Page 8 28 February ’91 ± 10 mm (manual) Side registration: ± 20 mm (mechanical) Vertical registration: Paper table raising / 22 mm/second (50 Hz) lowering speed: 26 mm/second (60 Hz) Ink supply: Automatic ink supply system 10 ± 0.3 kg Pressure roller pressure: Paper delivery: Air knife/vacuum delivery Delivery side plate...
Page 9 28 February ’91 ---- MEMO ----...
Page 10: Guide To Components And Their Functions
28 February ’91 2. GUIDE TO COMPONENTS AND THEIR FUNCTIONS (Paper Feed Side)
Page 11 28 February ’91 Name Function 1. ADF Unit Feeds the original to the printing position (VT2300/2500) automatically. 2. ADF Unit Open Use to open the ADF unit. Button (VT2300/2500) 3. Original Guides Adjust these guides to position the originals correctly. 4.
Page 12 28 February ’91 (Paper Delivery Side) 1-10...
Page 13 28 February ’91 Name Function 16. Master Cut Button Press this button to cut the master paper leading edge after installing a new master roll. 17. Pressure Release Use to install the master roll, or to clean the Lever thermal head. 18.
Page 14: Operation Panel
28 February ’91 3. OPERATION PANEL VT2300/VT2500 1. Reset Key Press to reset error indicators. 2. Make-up Key Press to use the make-up function (VT2500 only). 3. Number Keys Press to enter the number of prints. 4. Stop Key Press to stop the machine operation. The machine will continue operation when the Print Start key or Master Making key is pressed.
Page 15 28 February ’91 13. Speed Keys Press to adjust the rotation speed of the machine according to the type of image and printing paper. 14. Auto Cycle Key Use to automatically process masters and make prints. 15. Full Size Key Press to make prints the same size as the original.
Page 16 28 February ’91 VT2100/VT2130/VT2150 1. Reset Key Press to reset error indicators. 2. Indicators Light or blink when a non-standard condition occurs within the machine. 3. Auto Cycle Key Use to automatically process masters and make prints. 4. Reduction Key Press to reduce the image.
Page 17 28 February ’91 13 12 11 10 13. Memory Key Use to select memory location number. 14. Clear Key Press to change the number set in the counter. This key can be used only after the machine stops operation. 15. Speed Keys Press to adjust the rotation speed of the machine according to the type of image and printing paper.
Page 18: Printing Process
28 February ’91 4. PRINTING PROCESS 1. Master Ejecting: Eject the used master wrapped around the drum into the master eject box. 2. Scanning: Scan the original image by CCD through the mirror and the lens while feeding the original. 3.
Page 19: Electrical Component Layout
28 February ’91 5. ELECTRICAL COMPONENT LAYOUT 1. Original Registration Sensor 14. Paper Size Detection Sensor 1 2. 2nd Original Sensor (VT2300/VT2500) 3. Original Pressure Solenoid 15. Paper Size Detection Board (VT2300/VT2500) (VT2300/VT2500) 4. Original Transport Motor 16. Cutter Motor 5.
Page 20 28 February ’91 26. Master Eject Clamper Solenoid 35. Paper Feed Solenoid 27. Ink Detection PCB 36. Paper Table Drive Motor 28. Master Feed Clamper Solenoid 37. Drum Rotation Sensor 29. Master Eject Unit Safety Switch 38. Main Motor 30. Image Shift Motor 39.
Page 21 28 February ’91 43. CCD PCB 61. Copy Counter 44. A/D Conversion PCB 62. Master Counter 45. Master Cutter Switch 63. Interlock Switch 46. Scanner Safety Switch 64. Circuit Breaker 47. Drum Master Detection Sensor 65. Main Switch (VT2300/VT2500) 66. Air Knife Motor 48.
Page 22: Electrical Component Descriptions
28 February ’91 6. ELECTRICAL COMPONENT DESCRIPTIONS INDEX NAME FUNCTION P to P LOCATION Motors Original Transport Motor Transports the original to the scanner section. Master Feed Motor Feeds the master to the drum. Cutter Motor Cut the master. Master Eject Motor Sends used master into the master eject box.
Page 23 28 February ’91 INDEX NAME FUNCTION P to P LOCATION Switches Right Cutter Switch Detects when the cutter position is far right. Left Cutter Switch Detects when the cutter position is far left. Master Box Switch Checks whether the master eject box is installed correctly or not.
Page 24 28 February ’91 INDEX NAME FUNCTION P to P LOCATION Skip Paper Feed Switch Adjusts paper feed interval to allow (VT2300/VT2500) time for user to remove prints. (VT2300/2500) Printing Density Switch Use to select the printing density (VT2100 series) according to the type and quality of the (VT2100/2130 original.
Page 25 28 February ’91 INDEX NAME FUNCTION P to P LOCATION Paper End Sensor Informs the CPU when the paper table runs out of paper. (VT2300/2500) (VT2100/2130 /2150) Paper Table Lower Limit Detects when the paper table reaches Sensor the lowest position. Printing Pressure Sensor Informs the CPU when the printing pressure is applied.
Page 26: Mechanical Component Layout
28 February ’91 7. MECHANICAL COMPONENT LAYOUT 17 16 15 14 13 1211 10 9 8 7 6 1. Thermal Head 21. Mirror 2. Platen Roller 22. Master Eject Box 3. Master Feed Roller 23. Exit Pawl 4. CCD 24. Air Knife 5.
Page 27: Sectional Description
SECTION 2 SECTIONAL DESCRIPTION...
Page 28: Original Feed Section
28 February ’91 1. ORIGINAL FEED SECTION 1.1 OVERALL: VT2300/VT2500 [D] [C] [J]: 2nd Original Transport Rollers [K]: Exposure Glass [L]: Fluorescent Lamp There are two original feed modes in this model. ADF Mode: The originals [I] set on the original table are detected by the 1st original sensor [A].
Page 29 28 February ’91 1.2 OVERALL: VT2100/VT2130/VT2150 [J]: 2nd Original Transport Rollers [K]: Exposure Glass [L]: Fluorescent Lamp [H]: Original Registration Sensor The original [I] set on the original table is detected by the 2nd original sensor [F]. At the same time, the 1st original transport rollers [G] and 2nd original transport rollers [J] start rotating and feed the original to the original start position where is 12 mm far from the guide plate.
Page 30 28 February ’91 1.3 ORIGINAL FEED DRIVE MECHANISM: VT2300/VT2500 The original transport rollers [A] are driven by the original transport motor [B], which is a stepper motor. The original feed rollers [J] are driven by the ADF drive motor [C] through a series of gears [(a) to (f)]. The ADF drive motor is a dc motor.
Page 31 28 February ’91 1.4 ORIGINAL FEED DRIVE MECHANISM: VT2100/VT2130 /VT2150 When the actuator [A] is pressed down by the original, the 2nd original sensor [B] is activated and the original transport motor [C] starts rotating. The rotation of the original transport motor is transmitted to belts [D] and [E] to turn the lower first original transport roller and lower second original transport roller.
Page 32 28 February ’91 1.5 ELECTRICAL TIMING: VT2300/VT2500 (One Original): Insert Original 2nd Drum Position Sensor Master Making Key 1st Original Sensor Fluorescent Lamp ADF Drive Motor Original Pressure Solenoid 2nd Original Sensor 425 ms Original Feeds 25 mm Drum Original Registration Sensor Rotates Original Transport Motor Original...
Page 33 28 February ’91 After the original is fed 14 millimeters, master feeding and master making start. The ADF drive motor and the original pressure solenoid are turned off 425 mseconds after the 2nd original sensor detects the original. If 2nd original sensor is not activated within 2.3 seconds after pressing the Master Making key, the Original Misfeed indicator (A + ) will start blinking.
Page 34 28 February ’91 (Make-up mode): VT2500 only Insert Command Sheet Command Sheet Transportation Original Transportation Master Ejecting Start Master Making Key 1st Original Sensor Fluorescent Lamp ADF Drive Motor Original Pressure Solenoid 425 msec 2nd Original Sensor 425 msec Original Registration Sensor Original Transport Motor Original Feeds 25 mm...
Page 35 28 February ’91 1.6 ELECTRICAL TIMING: VT2100/VT2130/VT2150 Original Set Master Making Key "ON" 2nd Drum Position Sensor 2nd Original Sensor Drum Rotation Degree Original Registration Sensor Original Transport Fluorescent Lamp Original Feed Reading Command Length (14 mm) Master Feed Motor Master Feed Length (438 mm VT2100/VT2130) (371 mm VT2150)
Page 36 28 February ’91 Image 1.7 CIRCUIT: Processing Conversion P.C.B. P.C.B. CN603-1 CN601-13 CN403-13 Original CN603-4 Registration Sensor CN603-2 CN601-11 CN403-11 2nd Original CN603-3 Sensor CN403-25 CN601-25 (CN601-27) (CN403-27) CN601-17 CN403-17 CN601-18 CN403-18 CN601-19 CN403-19 Original CN601-20 Transport Motor CN403-20 CN601-21 CN403-21 Fluorescent Lamp Stabilizer...
Page 37 28 February ’91 1.8 OUTPUTS: A/D Conversion Board Signal Name Description CN No. Level Fluorescent When the fluorescent lamp turns Lamp CN601-15 on, the voltage of the CN601-15 is 3V. Reading When the CCD reads the original CN601-25 Command the voltage of CN601-25 (CN601-27) (CN601-27) is 0V.
Page 38 28 February ’91 2. OPTICS/IMAGE PROCESSING 2.1 OVERALL A/D Converter Thermal Head Thermal Head Image Processing Control Main Board Operation Panel [C]: Shading Plate [D]: Mirror [E]: Exposure Glass [F]: Fluorescent Lamp The light reflected from the original goes through the lens [A] and is changed to an electrical signal in the CCD [B].
Page 39: Light Source
28 February ’91 2.2 LIGHT SOURCE [G]: Exposure Glass [H]: Lens [I]: CCD [J]: A/D Converter [K]: Mirror The high frequency fluorescent lamp [A] is used as a light source for the high speed reading of 16 pixels/mm. The light exposes at two angles using a sub mirror [B] to prevent the shades at the edges of paste-ups on the original [C].
Page 40 28 February ’91 2.3 LENS 5 mm 30.655 mm 29.895 mm 404.179 mm Exposure Glass 312.5∅ 35∅ mm Original Surface This consists of 6 lenses, to transfer the image, correctly oriented, to the photoelectric elements of the CCD. It is possible to adjust the focus by moving the lens assembly [A].
Page 41 28 February ’91 2.4 CCD (Charge Coupled Device) φ1E φ1C φ1B φ2E Shift Registor Shift Gate 31 S1 S2 Shift Gate Shift Registor φ2C φ2B φ10 φ20 φ1E, φ2E Clock (Phase 1) CCD (16 dots/mm) φ10, φ20 Clock (Phase 2) Light Shift : Final Clock (Phase 1)
Page 42 28 February ’91 2.4.1 Function The principle circuit of each pixel in the CCD is shown above. The light reflected from the original is absorbed in the photodiode and the capacitor stores the charge corresponding to the light intensity. The CCD is composed of many such pixel elements in series. The image signal of each pixel element is stored in the shift register as a charge.
Page 43 28 February ’91 2.4.2 The Image Signal : CN801-2 CN602-2 CN801-4 CN602-4 CN801-6 CN602-6 A/D Converter CN801-8 CN602-8 CN801-12 CN602-12 CN801-14 CN602-14 CCD Board CN801-16 CN602-16 CN801-18 CN602-18 CN801-20 CN602-20 CN801-9, 10 CN602-9, 10 +12V CN801-1, 3, 5, 7, 11, 13, 15, 17, 19 CN602-1, 3, 5, 7, 11, 13, 15, 17, 19 3 ms (5,120 Count) 5,120...
Page 44 28 February ’91 2.5 A/D CONVERSION BOARD Outline: VT2100/VT2130/VT2150 Circuit Original Signal Conversion Direct Current Clamp Board Amplification Selector 1 Black Level Correction Counter Image Processing P.C.B 4 bit 4-bit A/D Conversion 4 bit Shading Selector 2 PKHTM Distortion Memory 8-bit D/A Conversion Peak...
Page 45 28 February ’91 2.5.1 CCD Output Signal Conversion, DC Clamping, Amplification: VT2100/VT2130/VT2150 Circuit: +12V VR600 4.7K TP600 602-4 Q607 IC624 2.2K IC620 DC Clamp Switch -12V IC628 C669 +12V 1.7V 1.7V (VT2300/VT2500: DCREST Approx. 6V IC624-6 Approx. 1.7V (VT2300/VT2500: 1.4V) 1.7V (VT2300/VT2500: 1.4V) DCREST...
Page 46 28 February ’91 2). DC Clamping The OS signal is amplified by Q607. The dc clamping switch is turned ON/OFF by the DCREST signal. The switch turns on when the CCD produces black level (empty data) at the end of scanning and is off during image scanning.
Page 47 28 February ’91 2.5.2 Peak Hold: CCD Board A/D Conversion Board Inverter A/D Conversion Image PKHTM Processing Board (CN403-27) CN403-25 Read (CN403-29) PKHST Peak Hold CN403-27 Timing Write Circuit BLSET (CN403-31) Signal CN403-29 Generator S LSYNC (CN403-33) CN403-31 S CLK SHMRT A/D Conversion ): VT2300/VT2500...
Page 48 4) Peak Hold Signal Timing: L. SYNC CN403-29 (CN403-31) Reading CN403-25 (CN403-27) Write Out CN403-27 (CN403-29) 5 lines 5 lines SHMRT PKHST PKHTM BLSET Image Reading Correction Timing Original Background P.H. Signal Input Peak Hold Timing ): VT2300/VT2500 A Section (Main Scanning) 2080 3140 4096 5120...
Page 49 28 February ’91 2.5.3 Shading Distortion Correction: Pixels Data PKHTM SHMRT Peak Hold 4 bit Signal Circuit Converter Shading Distortion Memory 4 bit Signal Current/ Voltage Converter Convertor VT2100/2130/2150: 1.7V VR(-) VT2300/VT2500: 1.4V VR(+) 1.7V: VT2100/2130/2150 1.4V: VT2300/VT2500 L. SYNC CN403-29 (CN403-31) Read CN403-25 (CN403-27)
Page 50 28 February ’91 1). Shading Distortion Memory White Peak Hold of Platen Cover Memory 4 bits 100% VT2100/2130/2150: 1.7V VT2300/2500: 1.4V 5,000 pixels When reading the white level of the platen cover, the peak hold (standard white) is determined using the five scan lines. The shading distortion data is stored in memory during the fifth scan line .
Page 51 28 February ’91 The reference (VR+) of the D/A converter is set to the peak hold of the original background. Distortion correction is obtained by using the output voltage of the D/A converter as the reference voltage (V ) of the A/D converter;...
Page 52 28 February ’91 2.5.4 Original Background Correction <Original background is lighter.> Peak Hold of Original Background VT2100/2130/2150: 1.7V VT2300/2500: 1.4V White Peak Hold of Platen Cover <Original background is darker.> Peak Hold of Original Background VT2100/2130/2150: 1.7V VT2300/2500: 1.4V VT2100/2130/2150: 1.7V VT2300/2500: 1.4V As the white peak hold of the original background is used as the reference (VR+) of the D/A converter, the overall shading distortion correction level is...
Page 53 28 February ’91 2.5.5 Black Level Correction (Line mode only) Selector 1 Counter VT2100/2130/2150: 1.7V VT2300/2500: 1.4V Amp. 4-bit A/D Conversion Selector 2 The black level correction compensates for the image density. Black level correction is used only when in line mode. The lower threshold level (V ) of the A/D converter is set according to a high density original or a low density original.
Page 54 28 February ’91 2.5.6 A/D Conversion Back Ground (White Peak) (White Standard) BAD1 BAD1 BAD2 BAD2 BAD3 BAD3 4 bit A/D Convertion BAD4 BAD4 (Black Standard) VT2100/VT2130/VT2150 Circuit: Selector 2 VPH of Platten/ Original Background VPH x 80% VPH of Shading Distortion Memory VPH x 53%...
Page 55 28 February ’91 VT2300/VT2500 Circuit: Photo Mode Selector VPH of Shading Distortion Memory Line/Photo Selector 2 VPH of Platten/ Original Background 4 bit Image Signal Line Mode Black Level Correction Selector Output of Selector 1 A/D CONVERSION PHOTO SHMRT Standard Voltage: 1.4V CN601-24 Density: 0...
Page 56 28 February ’91 1). Shading Distortion Correction -- (Selector 2 Switch 1 ON) Peak Hold of Waveform of Platen Cover Platen Cover 4-bit A/D Conversion VPH x53% (Black Level) VT2100/2130/2150: 1.7V VT2300/2500: 1.4V (Black Level) When reading the platen cover to establish the shading distortion data, the high reference voltage (V ) of the A/D converter is set to the peak hold level and the low reference voltage (V...
Page 57 (Corrected Waveform X 80%) 28 February ’91 Peak Hold of Background VH (Corrected Waveform x 80%) VL (VPH x 6%) (Black Level) VT2100/2130/2150: 1.7V VT2300/2500: 1.4V (Black Level) b). Photo Mode -- (Selector 2 Switch 2 ON) The V of the A/D converter is set to 80% of the potential difference between 1.7 volts (VT2300/2500: 1.4 volts) and the output from the D/A converter (converted shading distortion data).
Page 58 28 February ’91 2.5.7 Printing Density Change VT2100/VT2130/VT2150 Circuit in Line mode: Image Signal Shading Distortion Memory Correction Signal 4 bit 4 bit Gate Image Image Converter Signal Signal Selector 1 Output Black Date Correction Selector 3 CN606-2 CN606-3 Printing CN606-5 Density S.W.
Page 59 28 February ’91 VT2300/VT2500 Circuit in Line Mode: Line Mode Line/Photo Setector Selector 2 VPH of Shading Distortion Memory 4 bit Image Signal Black Level Correction Output of Selector 1 Standard Voltage: 1.4 A/D Converter CN601-24 Density : 0 CN601-25 Density : 1 SHMRT PHTO...
Page 60 28 February ’91 VT2300/VT2500 Circuit in Photo Mode: Photo Mode Selector Selector 2 VPH of Shading Distortion Memory 4 bit Image Signal VPH of Platlen/ Original Background A/D Converter CN601-24 Density : 0 CN601-25 Density : 1 SHMRT (Low signal when in Photo/Line mode) PHTO (Low signal when in Photo mode) The printing density (i.e.
Page 61 28 February ’91 2.6 REDUCTION PROCESSING: A/D Converter Image Processing PCB Main PCB Image Data BAD 1 4 bit BAD 2 Reduction Image Image BAD 3 Processing Processing Data BAD 4 Discard Timing Timing Signal Generator Original CN403-17 ORF0 A Transport 105-19 CN403-18...
Page 62 28 February ’91 processing circuit. Some of the 4-bit image data from the A/D converter is discarded according to the thinning timing control signal. 2.6.2 Movement: Main scan direction: Examples (A4 version) During the 71% reduction mode, 5 out of 7 pixels are used; 1 pixel is 7 pixels discarded each cycle.
Page 63 28 February ’91 2.6.3 Sub-scanning Reduction: CN605-1 E Phase A Phase CN403-17 CN605-2 CN605-3 B Phase D Phase CN403-18 Motor CN605-4 Drive CN605-5 Timing CN403-19 C Phase CN605-6 Pulse Generator CN605-7 Timing CN403-20 Pulse CN605-8 Generator CN605-9 CN403-21 CN605-10 Original Transort Motor Transort Motor Drive Circuit A/D Converter...
Page 64 28 February ’91 Reduction Original Transportation Command Sheet Transportation Ratio Pulse Width Pulse Width 100% 1.484 ms ---- 0.742 ms 1348 ---- 1348 1.378 ms = 0.928 0.689 ms 1451 1451 =0.928 1348 1.214 ms =0.818 0.607 ms 1648 1648 =0.818 1348 1.112 ms =0.74...
Page 65 28 February ’91 2.7 Enlargement Processing: VT2300/VT2500 In reduction processing, pixels are discarded according to the selected reduction ratio. In enlargement processing, pixels are added. Enlargement processing requires main scanning enlargement and sub-scanning enlargement. Main Scanning : Main scanning is performed by systematically adding pixels according to the enlargement ratio.
Page 66 28 February ’91 Examples: In 115% enlarge mode, the 7th pixel and the 13th pixel data are doubled to produce 15 pixels. This is repeated each main scan cycle. : Added Data 10 11 12 13 14 Enlarge 10 11 Full Size 10 11 12 13 In 122% enlarge mode, the 5th, 10th, and 14th pixels are doubled to...
Page 67 28 February ’91 In 141% enlarge mode, the 3rd, 5th, 8th, 10th, 13th, 15th, 18th, 20th, and 22nd pixels are doubled to produce 31 pixels. This is repeated each cycle. : Added Data 3 4 5 6 7 8 9 10 11 12 13 14 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Enlarge 14 15...
Page 68 28 February ’91 2.7.2 Sub-scanning Enlargement Enlargement in the sub-scanning direction is performed by decreasing the original transportation speed. When the enlargement signal is sent from the main control board, the frequency of the pulses from the pulse generator decreases. (The pulse length increases.) The drive pulse generator then decreases the frequency of the motor drive pulses to decrease the motor rotation speed.
Page 69 28 February ’91 2.8 IMAGE SIGNAL PROCESSING : BINARY CIRCUIT The binary circuit produces 1-bit data (white or black) from the output of the A/D converter (four-bit data) and sends it to the thermal head board. 2.8.1 Function 1) Line Mode: MTF (Modulation Transfer Function) Correction Processing 2) Photo Mode: Dither Processing (Graduation Processing) - 16 graduations...
Page 70 28 February ’91 2) Dither Processing This is part of the artificial graduation system. As each pixel can only be expressed by either black or white at print time, the dither process is used to transform a graduated original into 4 x 4 arrays containing only black and white pixels.
Page 71 28 February ’91 2.9 THERMAL HEAD PULSE GENERATOR: CN701 -1 +24V VHD (+16V) VHD (+16V) GND-B GND-B GND-B RANK 2 CN702-19 CN404-19 CN704-1 RANK 1 CN702-17 CN404-17 CN704-2 RANK 0 CN702-15 CN404-15 CN704-3 Pulse Generator CN702-13 CN404-13 CN704-5 CN702-11 CN404-11 CN704-6 Thermistor CN702-7...
Page 72 28 February ’91 1) Thermal Head Resistance The resistance of the thermal head varies from one head to the an- other. Therefore, after installing a new thermal head, always recalibrate the power supply unit according to the VHD ratings on the thermal head cover.
Page 73 28 February ’91 2.10 THERMAL HEAD DRIVE: 2.10.1 Function/Specification The VT2130/VT2150 use the A4 size (216 mm width) thermal head and the VT2100/VT2300/VT2500 use the B4 size (256 mm width) thermal head. Thermal head Memory length 256mm (B4) • 216 mm (A4/LG) Number of thermal heating elements 4096 dots (B4) •...
Page 74 28 February ’91 2.10.4 Movement CN404-1 CN702-1 CN704-7 S 18 P. DATA Thermal CN704-8 Image Signal Head Temp. CN704-9 Checking S 16 Image Pixel Circuit CN704-10 Data S 15 CN704-11 Decorder S 14 CN704-12 S 13 CN704-13 S 12 CN704-14 S 11 CN404-3 CN702-3...
Page 75 28 February ’91 H: Black Image Data L: White CN902-1 Output IC b L: Black H: White Previous Line IC a H: Black Memory Previous Image Data L: White 1st Output → H 2nd Output → L The image data (P-DATA) of 1 scanning sent to the thermal head drive control board is stored in the line memory.
Page 76 28 February ’91 P.LYNC 1 line 4096 5120 Pixel No. 1 128 1 128 1025 1025 2049 2049 3093 3093 SIN 1 SIN 2 SIN 3 Image SIN 4 Data SIN 5 SIN 6 SIN 7 SIN 8 CK 1 128P S 128P S CK 2...
Page 77 28 February ’91 2.10.5 Temperature Rise Detection of Thermal Head/Power Supply: A thermistor located on the thermal head and a thermal guard located on the power supply board are used for thermal protection. This is to prevent the temperature of the thermal head and the power supply board from overheating when continuously processing a solid image.
Page 78 28 February ’91 During the master making process, if the pulse width is out of standard, CN702-20 goes low and an error signal is applied to CN402-11. The master making stops and E-08 lights. The machine then stops after a master is wrapped around the drum.
Page 79 28 February ’91 2.11 MAKE-UP MODE: VT2500 only 2.11.1 Overall Operation Make Up Mode DATA MTF DATA Original Image Data Make Up Mode Image Area DATA Reduction Processing Processing M DATA Circuit Memory Circuit Command Sheet Normal Closed/ Image Data Image Processing Diagonal...
Page 80 28 February ’91 2.11.2 Command Sheet Data Reduction The designated line data read from the command sheet is reduced to 1/64 and stored in the memory as shown in the illustration. 8 pixels 8 pixels Stored Data If any pixel in each of the 8 x 8 pixel squares is black, the square is stored as black data.
Page 81 28 February ’91 1). Solid Fill Operation (Closed Area) How to decide whether pixel E data is black or white. 1. When pixel E is black, E is Scanning Direction black. 2. When the pixel C or F is black and also the pixel D or G is black, E is black.
Page 82 28 February ’91 2.11.4 Make-up Control Circuit H: Background L: Image MTF. DATA Modulated Image Selector Data H: Background D 13 (Fn16.26.56.66) L: Image M. DATA 1 D 12 (Fn15.25.55.65) Image Data D 11 (Fn14.24.54.64) D 10 (Fn13.23.53.63) Outline Image D 9 (Fn12.22.52.62) Data Image...
Page 83 28 February ’91 Image data Designated area data Fn1: Save area (Original) (Command Sheet) The image data is ANDed with the designated area data in command sheet and the edited image data is output. Fn2: Delete area Inverted data of designated area Image data (Command Sheet)
Page 84 28 February ’91 Fn4: Screen Image Image data Disignated area data (Original) (Command Sheet) Step 1: This image data is ANDed with the designated area data and the edited image data is output. Screen pattern data 1/4 mm 1/4 mm Step 2: (Step 1) The screen pattern data is...
Page 85 28 February ’91 Fn11, Fn21: Pattern Area / Outline Image Background Designated area data (Fn51, Fn62) pattern data (Command sheet) Fn14, Fn24: Save Area / Pattern Area / (Fn54, Fn64)Outline Image Step 1: The background pattern data is Inverted image data (Original) ANDed with the designated area data and the edited image...
Page 86 28 February ’91 Fn13, Fn23 : Pattern Image Image data Designated area pattern data (Original) (Fn53, Fn63) Fn16, Fn26 : Save Area / Pattern Image (Fn56, Fn66) Step 1: The image data is ANDed with Fn6 data the designated area pattern (Step 1) data and the edited image data is output.
Page 87 28 February ’91 2.11.5 Background Pattern 1). 4 mm Background Pattern The 2mm background pattern data is stored in the ROM on the make-up board. The 4 mm background pattern is made by simply doubling the 2 mm background data with the F/F circuit. Background data in ROM 4 mm Background Pattern (2 mm standard pattern)
Page 88 28 February ’91 3). Background Patterns The 40 background patterns shown below can be selected. 2-61...
Page 89 28 February ’91 2-62...
Page 90 28 February ’91 2-63...
Page 91 28 February ’91 2-64...
Page 92 28 February ’91 2-65...
Page 93 28 February ’91 2.11.6 Recognition of Designated Area: VT2500 only As the required image may differ depending on how the designated area is entered, make the command sheet by referring to the following. Sample of Problem Item Preferred designated area Designated area Area recognized Form of the Serial pattern...
Page 94 28 February ’91 Sample of Problem Item Preferred designated area Designated area Area recognized Thickness of The thickness As the line of Mark with a line more than 1 mm of the line as the designated in width. designating follows: area is too thin, line.
Page 95 28 February ’91 Sample of Problem Item Preferred designated area Designated area Area recognized Gap between When the gap Depending on between the the original designated designated feed condition area and area and (registration 2 mm neighboring neighboring and skewing) 2 mm image.
Page 96 28 February ’91 3. MASTER FEED SECTION 3.1 OVERALL The thermal head [A] burns an image on the master [B] as it is being fed to the drum [C]. After this, the master is clamped and wrapped around the drum. 2-69...
Page 97 28 February ’91 3.2 MASTER CLAMPER OPENING MECHANISM After the master eject process is finished and the interrupter [A] is posi- tioned in the first drum position sensor [B], the main motor turns on and the drum starts rotating (30 rpm) in the reverse direction. When the drum turns 160 degrees past the actuation position of the second drum position sensor [C], the cam [D] is moved to the drum’s side as the master feed clamper solenoid [E] turns on.
Page 98 28 February ’91 3.3 MASTER FEEDING MECHANISM The original transport motor starts rotating after the drum rotates 120 de- grees past the 2nd drum position sensor. The reverse roller solenoid [A] and the master feed motor [B] turn on after the original is fed 14 mm. The rotation of the master feed motor is transmitted to the platen roller [C] through the belt [D] and the pulley [E] which feeds the master and forces the master to contact the thermal head [F].
Page 99 28 February ’91 3.4 MASTER WRAPPING MECHANISM Sensor OFF: Sensor ON: When the reverse roller solenoid [A] is turned off, the reverse roller [B] stops as the stopper [C] locks the clutch gear [D]. However, since the feed roller [E] turn continuously, the master continues to be fed causing the master to buckle.
Page 100: Cutter Mechanism
28 February ’91 3.5 CUTTER MECHANISM After the master making process (writing process) is finished, the master feed motor turns off and the cutter motor [A] starts turning in the reverse di- rection as indicated by the arrow. The cutter motor drives the wire pulley [B] through the gears [C], [D], [E], and [F].
Page 101: Electrical Timing
28 February ’91 3.6 ELECTRICAL TIMING 1st Drum Position Sensor Main Motor (Reverse) Drum Rotates 220° 2nd Drum Position Sensor Drum Rotates 120° Original Transport Motor Original Feed 14 mm Reverse Roller Solenoid Master Feed Motor Drum Rotates 160° Master Feed Clamp Solenoid Buckle Sensor Main Motor...
Page 102 28 February ’91 The reverse roller solenoid and the master feed clamper solenoid are de-energized when the master is fed 61 mm. After the reverse roller solenoid is de-energized, the master buckles and the master buckle sensor is activated. At the same time the main motor turns on to wrap the master around the drum.
Page 103 28 February ’91 3.7 CIRCUIT: VT2300/VT2500 CN104-5 GND-A CN102-29 Cutter Motor (+) Cutter M CN102-27 Cutter Motor ( - ) Reverse Roller CN102-6 Reverse Roller CN102-39 VCC [5] Master CN104-31 Master Bukle Buckle Sensor Sensor CN102-49 Master VHG [24] Feed CN102-19 Clamper Master Feed...
Page 104 28 February ’91 3.9 CIRCUIT: VT2100/VT2130/VT2150 CN104-10 GND-A GND-A CN104-21 Cutter Motor (+) Cutter M CN104-22 Cutter Motor ( - ) CN104-4 VHG [24] Reverse Roller CN104-23 Reverse Roller CN104-8 VCC [5] Master CN104-17 Master Buckle Buckle Sensor Sensor GND-A CN104-6 Master VHG [24]...
Page 105: Master Eject Section
28 February ’91 4. MASTER EJECT SECTION 4.1 OVERALL Master Drum rotates in direction opposite • to printing. Master eject rollers rotate. • Lower Eject Lower eject roller contacts drum. • Roller The curled master is caught be- • tween the upper and lower eject rollers to eject the master into the Drum master eject box.
Page 106 28 February ’91 4.2 MASTER EJECT ROLLER ROTATING MECHANISM After the original is set, the main motor rotates in the reverse direction (30 rpm) when the Master Making key is pressed. When the interrupter [A] blocks the 2nd drum position sensor [B], the mas- ter eject motor [C] starts rotating counterclockwise and the gear [D] is driven clockwise through gears [E], [F], [G], and [H].
Page 107 28 February ’91 4.3 MASTER EJECT ROLLER DRIVE MECHANISM When the drum turns 20 degrees past the second drum position sensor [A], the master eject solenoid [B] turns on and the supporter [C] turns counter- clockwise around the upper eject roller shaft [D]. This forces the lower first eject rollers [E] to contact the drum.
Page 108 28 February ’91 When the drum turns 70 degrees past the second drum position sensor, the master eject solenoid [A] turns off, separating the lower first eject roller [B] from the drum. When the ejected master is between the upper and lower first eject rollers, it activates the master eject switch [C].
Page 109 28 February ’91 Master Eject Misfeed Detection: 2nd Drum Position SN 50° 20° 20° 30° Master Eject Sol. 120° Master Eject Switch (Sensor) Main Motor Reversing 83° Main Motor Forwarding Master Eject Motor Reversing 1st Master 2nd Master Eject Process Eject Process ): VT2300/VT2500 When the master eject switch is not activated within 120 degrees of drum re-...
Page 110 28 February ’91 4.4 MASTER EJECT CLAMPER MECHANISM When the drum has turned 230 degrees past the second drum position sen- sor activation position, the master eject clamper solenoid [A] turns on and turns the lever [B] counterclockwise. This moves the cam [C] to the drum’s side.
Page 111 28 February ’91 4.5 PRESSURE PLATE UP/DOWN MECHANISM After the master making process is finished, the master eject motor [A] turns clockwise to raise the pressure plate [B]. When the master eject motor turns, the gear [C] is driven through the timing belt [R] the gears [D], [E], [F], [G], [H], [I], [J], [K], [L] and [M].
Page 112 28 February ’91 After the master eject process is finished, the master eject motor [A] turns clockwise, driving the gear [B] clockwise through the relay gears. When the pin [C] of the gear [B] turns about 45 degrees, the pressure plate goes down immediately due to the one-way clutch in the gear [D] and the pressure spring [E].
Page 113 28 February ’91 4.6 ELECTRICAL TIMING Master Making Key "ON" 1st Drum Position Sensor 2nd Drum Position Sensor Paper Table Height SN 13° Main Motor Reversing Master Eject Motor Reversing 50° 20° 160° Master Eject Sol. 230° 500 ms Master Eject Clamper Sol. 100 ms Main Motor Forwarding Master Eject Detecting SN...
Page 114 28 February ’91 4.7 CIRCUIT: VT2300/VT2500 CN104-24 CN102-47 Master Box SW CN104-26 Full Master Master Eject SOL CN102-17 Detecting SW CN104-20 Pressure Plate CN102-49 Position SW Master Eject Clamper SOL CN102-19 Master Eject SN CN102-25 CN102-26 Master Eject Motor CN102-35 CN104-37 CN102-23 Master Eject Motor:...
Page 115 28 February ’91 4.9 CIRCUIT: VT2100/VT2130/VT2150 CN104-27 Full Master CN104-6 Detecting SW Master Eject SOL CN104-28 CN104-25 Pressure Plate Position SW Master Eject Clamper SOL CN104-24 CN102-29 Master Eject SW CN104-29 Master Eject Motor CN104-26 Master Box SW CN104-30 Main Board CN301-2 Master Eject Motor: Turning counterclockwise...
Page 116: Paper Feed Section
28 February ’91 5. PAPER FEED SECTION 5.1 OVERALL 2nd Upper Feed Roller Paper Feed Roller Upper Separation Roller Paper 2nd Lower Lower Separation Feed Roller Roller [A]: Separation Plate [B]: Paper Feed Roller [C]: Upper Separation Roller [D]: 2nd Upper Feed Roller [E]: 2nd Lower Feed Roller [F]: Lower Separation Roller This machine uses a center separation system, which consists of the sepa-...
Page 117 28 February ’91 5.2 PAPER FEED ROLLER/UPPER SEPARATION ROLLER MECHANISM The sector gear [A], located on the non-operation side, rotates the paper feed roller [B] and the upper separation roller [C]. When the paper feed sole- noid [D] turns on, the link [E] is pulled and the sector stopper [F] turns coun- terclockwise.
Page 118 28 February ’91 5.3 FEED ROLLER PRESSURE MECHANISM The feed roller assembly [A] rotates clockwise around it’s shaft [B] due to the weight of assembly. The feed roller rotation is resisted by the feed roller pressure spring [C]. The force difference between the feed roller assembly weight and the pres- sure spring force is applied to the paper as a feed roller pressure.
Page 119: Separation Mechanism
28 February ’91 5.4 SEPARATION MECHANISM DOWN The separation plate [A] is in contact with the upper separation roller [C] due to the spring [B]. This is to prevent multiple paper feed. As the lower separation roller [D] does not turn clockwise due to the one way clutch bearings [G] provided on both right and left separation levers [E], the sheets are separated and a sheet of paper is fed to the second feed roll- ers.
Page 120 28 February ’91 5.5 SEPARATION ROLLER PRESSURE RELEASE MECHANISM [C]: Lower Separation Roller [D]: Upper Separation Roller [E]: Separation Pressure Adjusting Lever When the paper table lowers the paper feed roller lever [A] also lowers and presses the left separation lever [B] to release the separation roller pressure. This mechanism makes misfed paper removal easy.
Page 121 28 February ’91 5.6 SECOND FEED ROLLER MECHANISM The lower second feed roller [A] is driven by the sector gear [B] and the gear [C]. When the paper feed solenoid [D] turns on, the link [E] combined with the paper feed roller sector stopper [F] is pulled and the second feed roller sector stopper [G] turns counterclockwise.
Page 122 28 February ’91 Normally, the upper second feed roller [A] does not contact the lower sec- ond feed roller [B]. When the second feed roller sector gear [C] is moved, the upper second feed roller moves against the lower second feed roller to feed paper to the drum section.
Page 123 28 February ’91 5.7 PAPER TABLE UP/DOWN MECHANISM The paper table is raised and lowered by the paper table drive motor [A]. The paper end sensor [B] is actuated when the paper is set on the paper ta- ble. When the Print Start key is pressed, the paper table drive motor starts turning clockwise (X direction) and the worm gear [C] also turns.
Page 124 28 February ’91 2-97...
Page 125 28 February ’91 5.8 SIDE REGISTRATION MECHANISM The shaft [A] of the fine adjusting dial [B] is threaded. The inside of the sleeve [C] is also threaded. The sleeve is fixed to the feed table stay [D] through a bracket [E]. The feed table brackets [F] mounted under the table are fixed on the both ends of the adjusting dial shaft.
Page 126 28 February ’91 5.9 PAPER SIZE DETECTION: VT2300/VT2500 B5/LT lengthwise. [SN3] [SN1] SN2] A4/LG lengthwise. [SN3] [SN1] SN2] B4/DLT lengthwise. [SN3] [SN1] SN2] The size of the paper set on the paper table is detected by the three paper size sensors (photo sensors) mounted on the paper table [A]. The master making process (Master feed direction only) is controlled accord- ing to the detected paper size so that ink will not be transferred to the pres- sure roller when the printing paper is smaller than the image on the master.
Page 127 28 February ’91 5.10 PAPER END DETECTION: VT2300/VT2500 A reflective sensor [A] (non-actuator type) is used to detect paper end. This makes it possible for the optional paper cassette to be installed on the pa- per table. 5.11 OPTIONAL B4 PAPER CASSETTE: VT2300/VT2500 The optional B4 paper cassette is the universal type.
Page 128: Electrical Timing
28 February ’91 5.12 ELECTRICAL TIMING Master Eject Master Clamp Master Trial Print Print Making Main Start Counter Paper "ON" "ON" "0" Paper Table Height SN Paper Table Lower Limit SN Paper End SN (sw) Paper Table Motor Up Main Motor Reversing 1st Drum Position SN 2nd Drum Position SN Paper Feed Sol.
Page 129 28 February ’91 5.13 CIRCUIT: VT2300/VT2500 Paper Table Lower Limit SN 102-36 +12V +12V 102-38 102-42 SENS1 -12V Paper 104-4 +12V 104-23 104-21 Paper End 102-24 SENS2 SN-3 104-4 Paper End SN 102-20 SN-2 102-18 SN-1 Paper Size Detection Board 102-14 Paper Table Height SN +24V...
Page 130 28 February ’91 5.15 CIRCUIT: VT2100/VT2130/VT2150 Main Control P.C.B. Paper Table Height Sensor CN 104-6 CN 103-3 Paper Feed SOL CN 102-22 CN 102-31 Printing Pressure SOL CN 102-27 Paper Table Lower Limit Sensor RA303 RA 302-3 301-7 CN 104-9 RA302 Paper Tabel CN 102-21...
Page 131: Printing Section
28 February ’91 6. PRINTING SECTION 6.1 OVERALL Drum Paper Detecting Arm Pressure ON/OFF Lever In this section, the paper detecting feeler [A] detects whether paper is fed correctly to the second paper feed roller section or not. Only when the paper is correctly fed, printing pressure is applied (the pres- sure roller [B] contacts the drum) to transmit the ink from the master to the printing paper.
Page 132 28 February ’91 6.2 PAPER DETECTING AND PRINTING PRESSURE ON/OFF MECHANISM Printing Pressure ON → Printing Pressure sensor [H] is not interrupted. Printing Pressure OFF → Printing Pressure sensor [H] is interrupted. The main motor turns the gear [A], thus rotating the pressure cam [B]. Dur- ing the printing process, the pressure cam [B] turns clockwise as the main motor turns clockwise.
Page 133 28 February ’91 This release mechanism prevents deformation of the drum and the pressure roller when the drum is pulled out to remove misfed paper. The printing pressure solenoid [A] is energized/de-energized at the same time as the paper feed solenoid. When a paper misfeed occurs, the paper feed solenoid and the printing pressure solenoid are de-energized but the print pressure is still applied to the drum.
Page 134 28 February ’91 6.4 CIRCUIT Printing Pressure Sensor CN103-1 CN103-5 (CN102-38) Print Counter CN104-25 CN102-34 (CN104-28) (CN102-4) CN104-6 CN103-4 : GND (CN102-45) (CN104-4 : GND) Paper Feed SOL CN102-31 (CN102-14) ): VT2300/VT2500 Printing Main Board Pressure SOL 6.5 INPUT/OUTPUT Main Control PCB Signal Name Description CN No.
Page 135: Drum Section
28 February ’91 7. DRUM SECTION 7.1 OVERALL [A]: Doctor Roller [B]: Ink [C]: Ink Roller [D]: Pressure Roller [E]: Paper [F]: Drum In this section, ink is supplied from the ink cartridge and is applied to the ink roller uniformly. The ink is then transferred to the printing paper through the holes in the master.
Page 136: Drum Rotation Mechanism
28 February ’91 7.2 DRUM ROTATION MECHANISM The main motor (DC motor) [A], located under the rear side plate, turns the drum either clockwise or counterclockwise by means of belt [B], gears [C] [D], belt [E], and pulley [F]. The drive mechanism uses helical gears, which turn more quietly. Gear [H] at the rear of the machine and gear [G] at the rear end of the drum unit have special grooves that prevent gear [G] from engaging gear [H] if gear [H] is not at the correct position.
Page 137 28 February ’91 7.3 DRUM LOCK MECHANISM 1 When the drum unit is set in the machine, the arm [A] is turned counter- clockwise by the lock pin [B]. The top of the arm is locked by the stopper [C] to lock the drum in the machine completely. At the same time, the drum detecting switch [D] is turned on by the top of the stopper [C].
Page 138 28 February ’91 7.4 DRUM LOCK MECHANISM 2: VT2300/VT2500 The drum lock solenoid [A] turns on when the copy cycle is interrupted by opening a cover or turning off the main switch. Arm [B] then locks arm [C] in place. This prevents the drum from being removed. When lever [D] is pulled towards the front of the machine, arm [E] raises and the drum safety switch [F] turns off.
Page 139 28 February ’91 7.5 DRUM LOCK MECHANISM 3 *When the drum is set in the machine. To prevent the drum from rotating when the drum is pulled out of the ma- chine, the drum stopper [A] drops into the drum lock [B] to secure the drum. When the drum is installed in the machine, the drum stopper [A] is held out of the drum lock by the side plate of the machine.
Page 140 28 February ’91 7.6 DRUM LOCK MECHANISM 4 Operation Side When the drum is pulled out, the drum stopper [A] drops down into the hole as shown in the figure and the drum stopper stops the drum unit from being pulled out any further.
Page 141: Ink Supply Mechanism
28 February ’91 7.7 INK SUPPLY MECHANISM Ink is supplied from the ink cartridge [A] to the ink roller by the ink pump [B] through 4 holes in the drum shaft [C]. Drum rotation is transmitted through gear [D] to gear [E]. However, rotation is not transmitted to gear [F] due to the spring clutch [G].
Page 142 28 February ’91 7.8 INK KNEADING MECHANISM 0.08 mm The ink kneading mechanism consists of the ink roller [A] which rotates with the drum and the doctor roller [B] which ensures that the ink is supplied evenly to the ink roller. The ink roller rotates due to the gear [C], which rotates with the drum, through idle gear [D] and gear [E] mounted on the ink roller.
Page 143 28 February ’91 7.9 DRUM MASTER DETECTION: VT2300/VT2500 The drum master detection sensor [A] mounted on the drum rail detects whether the master is on the drum. When there is a master on the drum, the black seal [B] is covered and the sensor detects the light reflected from the master [C].
Page 144: Ink Detection
28 February ’91 7.10 INK DETECTION D902 OUTPUT1 VR901 TP INK CN104-16 (CN104-9) THRESHOLD D904 D903 OUTPUT2 CN902-2 -12V Main Control P.C.B. -12V TRIGGER2 THRESHOLD CN901-1 C908 INK Detecting Board ): VT2300/VT2500 [A]: Doctor Roller [B]: Detecting Pin [C]: Ink Roller The ink detection circuit consists of an electrode (detecting pin), to detect the electrostatic capacity and a multivibrator.
Page 145 28 February ’91 Ink is present No ink is present 1) Standard Generation Pulse 2) Detecting Pulse 3) Output of CN902-2 LED 102) (1) The standard pulse is output from OUTPUT 1. The pulse length (T can be adjusted by adjusting VR901. (2) OUTPUT 2 is the detection pulse.
Page 146 28 February ’91 7.11 ELECTRICAL TIMING 20 rotations 2nd Drum Position Sensor signal No Ink Ink Supply Sol. No Ink Indication After all the ink has been consumed and the no ink signal is HIGH,the ink supply solenoid turns on at the rising edge of the sec- ond drum position sensor signal.
Page 147 28 February ’91 7.12 CIRCUIT: Main Control Board +24V 102-45 (104-28) (104-6) 102-46 +24V Fuse Drum Safety SW Ink Supply SOL 102-16 (104-1) (102-32) 104-39 (5A) 104-3 (102-8) 102-11 (104-17) 104-14 Color Drum (102-18) 102-15 No 1 (104-26) Drum 104-30 VT2300/VT2500 Only No 2 (104-7)
Page 148 28 February ’91 8. IMAGE SHIFTING SECTION 8.1 OVERALL The image on the printing paper can be shifted 20 millimeters either back- wards or forward using the Image Shift keys on the operation panel. The image position is adjusted by the image shifting motor which changes the paper feed timing by turning the first paper feed and second feed cams.
Page 149 28 February ’91 This brake mechanism prevents the print image from shifting during the printing process. The gear [Q] pressed by spring [R] is used to brake the gear [C]. 2-122...
Page 150: Electrical Operation
28 February ’91 8.3 ELECTRICAL OPERATION: Image Shifting Key CN102-36 (CN102-33) SW220 (Backward) CN101-29 CN102-37 (CN102-31) SW216 CN101-30 Image Shifting Key CN101-14 (Forward) CN119-1 CN102-11 (CN104-11) CN119-2 CN102-13 (CN104-13) CN119-3 CN102-14 (CN104-16) CN119-4 CN102-15 (CN104-18) CN119-5 ): VT2300/VT2500 CN301-2 When the Image Shifting key (forward key = SW216) is pressed, CN102-37 (CN102-31) becomes 22 V and CN102-36 (CN102-33) becomes 0 V.
Page 151: Delivery Section
28 February ’91 9. DELIVERY SECTION 9.1 OVERALL * View from non-operation side [E]: Paper [F]: Vacuum Fan [G]: Pressure Roller This section consists of the exit pawl [A] and air knife (blower fan) [B], which separate the paper leading edge from the drum [C], and the vacuum units [D], which deliver the separated paper to the delivery table.
Page 152: Exit Pawl Drive Mechanism
28 February ’91 9.2 EXIT PAWL DRIVE MECHANISM The exit pawl [A] located in the center of the drum, guides the center of the printing paper. As the master clamper [B] approaches the exit pawl, the exit pawl moves away from the drum. When the bearing of the pressure ON/OFF cam [C] comes to the top of the pressure cam [D], the exit pawl drive cam [E] mounted on the pressure ON/OFF cam, moves up.
Page 153 28 February ’91 9.3 VACUUM UNIT DRIVE MECHANISM The vacuum fan [A] holds the paper against the transport belts [B]. The transport belts move the paper to the delivery table. A fixed wing guide [C] at each end of the vacuum unit helps keep the back side of the printing paper clean.
Page 154 28 February ’91 9.4 MISFEED/PAPER WRAP 2nd Drum Position Sensor Paper Feed Sol. Printing Pressure Sensor 1st Paper Exit Sensor Correct Misfeed Paper Wrap Misfeed If printing pressure is not applied (printing pressure sensor is interrupted) when the paper feed solenoid turns on, the Misfeed indicator blinks and the drum stops.
Page 155 28 February ’91 9.6 CIRCUIT: VT2100/VT2130/VT2150 Main Control P.C.B. Relay Board Paper CN102-4 CN301-9 CN104-13 CN104-31 (GND) CN104-15 CN301-5 1st Paper CN302-7 CN104-33 Exit Sensor Air Knife Motor CN304-1 Paper CN102-3 Vacuum Motor CN104-32 (Blower) (GND) CN304-2 CN304-3 (50Hz only) 2nd Paper CN104-34 Exit Sensor...
Page 156 28 February ’91 9.8 CIRCUIT: VT2300/VT2500 Main Control P.C.B. Relay Board Paper CN102-34 CN301-9 CN102-10 CN104-36 (GND) CN102-13 CN301-5 1st Paper CN302-7 CN102-32 Exit Sensor Air Knife Motor CN304-1 Paper Vacuum Motor CN102-30 (Blower) (GND) CN304-2 CN304-3 (50Hz only) 2nd Paper CN104-38 Exit Sensor AC100V...
Page 157 28 February ’91 9.10 ELECTRICAL TIMING: Print Start Master Wrap Master Counter "0" 1st Drum Position SN Main Motor Forwarding Right Cutter SW Vacuum Fan Air Knife Motor After the master is cut and the right cutter switch turns on, the main motor starts rotating.
Page 158 28 February ’91 10. INDICATORS/KEYS/PROGRAMS: VT2300/VT2500 10.1 CHECK PAPER SIZE/DIRECTION INDICATOR When an enlargement ratio (A4: 115%, 122%, or 141% LT: 115%, 127%, or 141%) is selected with the Reduce/Enlarge key, the Check Paper Size/Direction indicator lights. This indicator turns off when the Master Making key, Print Start key, or Proof key is pressed and full size mode or reduction mode is selected.
Page 159: Combine 2 Originals
28 February ’91 10.4 COMBINE 2 ORIGINALS The length of the original in Combine 2 Originals mode is limited accord- ing to the printing paper size and magnification ratio. When the original is too long, Combine 2 Original mode is automatically canceled and only the first original is made.
Page 160 28 February ’91 10.5 MEMORY/CLASS KEY The Memory/Class switch selects Memory or Class mode. When Memory mode is selected (Memory indicator lights), Up to 15 prints can be input. Press the Master Making key after returning the memory number to "1". When Class mode is selected (Class indicator lights), the number of prints for up to 20 groups can be input.
Page 161: Initial Check
28 February ’91 10.8 INITIAL CHECK When the main switch is turned on, the CPU checks the ON/OFF status of the sensors listed below. If a sensor is ON, the letter on the Jam indicator corresponding to the sensor blinks: Master Eject Sensor......
Page 162 28 February ’91 11. DIFFERENCES BETWEEN SS900 SERIES AND VT 2000 SERIES Item Remarks The heating elements used in the VT2000 series thermal head are smaller than those used on the SS900 series. This reduces ink set-off on the back sides of copies.
Page 163 28 February ’91 Item Remarks The paper feed roller cam has been slightly modified as shown to reduce the paper speed to 55% that of the SS900 series. (Extended outward at point [A].) This reduces the noise caused when the paper leading edge strikes the second feed roller.
Page 164 28 February ’91 Item Remarks The shape of the VT2000 pressure cam has been modified slightly as shown to decrease the pressure roller speed to 70% that of the SS900 series. (A portion at point [A] has been shaved off.) This reduces the noise caused when the pressure roller moves against the drum.
Page 165 28 February ’91 Item Remarks The 40 cpm print speed at each step has been eliminated on the VT2000 series. This reduces ink set-off, which is most likely to occur at low printing speeds. SS900 Series VT2000 Series Step 1: 40 sheets/min.
Page 166 28 February ’91 Item Remarks To prevent users from installing SS900 masters on VT2000 series machines, the diameter of each master spool [A] and master spool holder [B] has been changed as follows: SS900 series 20φ 50φ 20φ VT2000 series 46φ...
Page 167 28 February ’91 Item Remarks A guard [A] has been mounted on the cutter unit [B] to prevent contact with the cutter edge (sharp) during cutter unit removal or installation. Cutter Section Counter rollers [C] have been added to prevent new masters from creasing as they are being fed through the master reverse section.
Page 168 28 February ’91 Item Remarks Both ends of the metal screen [A] pass through a half etching process. The half etch area [B] is thinner than the other areas. This improves the outer portion of the copy image. The outer drum screen consists of two tetron screens[C] that reduce ink set-off.
Page 169 28 February ’91 Item Remarks The sponge cushions [A] that were affixed to the paper delivery end plate have been removed to prevent paper sheets from bouncing back when they strike the paper delivery end plate. Paper Delivery End Plate Two different sizes of pressure rollers are used because the printing area in the horizontal direction [B] on the VT2130/2150 machines is narrower.
Page 170 28 February ’91 Item Remarks The platen roller [A] has been changed to an electrically conductive type to prevent the master from wrapping around the platen roller. Platen Roller 2-143...
Page 171: Installation
SECTION 3 INSTALLATION...
Page 172: Installation Requirements
28 February ’91 1. INSTALLATION REQUIREMENTS The installation location should be carefully chosen because the environmental conditions greatly affect the performance of a machine. 1.1 OPTIMUM ENVIRONMENTAL CONDITIONS: Temperature ---- 10 to 30°C Well-ventilated and wide room. (50 to 86°F) Minimum ventilation: Humidity ---- 20 to 90 % RH...
Page 173: Environments To Avoid
28 February ’91 1.2 ENVIRONMENTS TO AVOID: Location exposed to direct sun-light Dusty areas. or strong light (more than 1,500 lux). Areas with corrosive gases. Locations directly exposed to cool air from an air conditioner or to reflected hear from a space heater. (Sudden temperature changes from low to high or vice versa may cause condensation within the machine.)
Page 174 28 February ’91 1.4 POWER CONNECTION: Securely connect the power cord to a Voltage must not fluctuate more than power source. 10%. a) 110V, 60 Hz: More than 6.0A b) 120V, 60Hz: More than 5.5A c) 220V 240V, 50Hz: More than 2.7A Make sure the plug is firmly inserted in the outlet.
Page 175: Access To Machine
28 February ’91 1.5 ACCESS TO MACHINE: Place the machine near a power source, providing clearance as shown below. 10 cm (4.0") Paper Paper 61 cm Feed Delivery (24.0") Table Table More than 70 cm (27.6") More than More than 60 cm 128 cm (50.4") 60 cm...
Page 176 28 February ’91 2. VT2300/2500 INSTALLATION PROCEDURE 1. Make sure that you have all the accessories listed below. (1) Original Exit Tray ..............1 (2) Right Tray Bracket ...............1 Left Tray Bracket ..............1 (3) Fixing Screws...............2 (4) Master Spools ..............2 (5) Thermal Head Cleaner ............1 (6) Operating Instructions (USA and Asia Version Only ) ....
Page 177 28 February ’91 Paper Paper Exit Feed Rear Side Paper Paper Exit Feed Front Side 2. Place two noise absorbers on the optional table. NOTE: Make sure that the noise absorbers are positioned on the table at the locations shown in the above figure. 3.Mount the machine on the optional table (2 screws--packed with table).
Page 178 28 February ’91 5. Remove the protective sheet [A] from the drum unit. a. Open the front door. b. Take out the drum unit. c. Remove the protective sheet from the master clamper. d. Reinstall the drum unit in the ma- chine.
Page 179 28 February ’91 7. Loading Paper on the Paper Feed Ta- a. Open the paper feed table. b. Stack the paper neatly on the paper feed table. c. Position the paper feed side plates so that they lightly contact the paper on both sides.
Page 180 28 February ’91 9. Installing the Ink Cartridge a. Open the front door and lower the ink holder. b. Remove the ink cartridge cap. c. Insert the ink cartridge into the ink holder and return the ink holder to the original position. d.
Page 181 28 February ’91 2.1 VT2100/2130/2150 INSTALLATION PROCEDURE 1. Make sure that you have all the accessories listed below. (1) Original Exit Tray .................. 1 (2) Right Tray Bracket................1 Left Tray Bracket.................. 1 (3) Fixing Screws ..................2 (4) Master Spools ..................2 (5) Thermal Head Cleaner .................
Page 182 28 February ’91 2. Mount the machine on the optional table (2 screws packed with table). 3. Remove the tape and string securing the covers and units as shown on the right. a. Open the paper feed tray. Then remove the cushion plate [A] from the paper feed roller section.
Page 183 28 February ’91 4. Remove the protective sheet [A] from the drum unit. a. Open the front door. b. Take out the drum unit. c. Remove the protective sheet from the master clamper. d. Reinstall the drum unit in the ma- chine.
Page 184 28 February ’91 7. Loading Paper on the Paper Feed Ta- a. Open the paper feed table. b. Stack the paper neatly on the paper feed table. c. Position the paper feed side plates so that they lightly contact the paper on both sides.
Page 185 28 February ’91 8. Installing the Ink Cartridge a. Open the front door and lower the ink holder. b. Remove the ink cartridge cap. c. Insert the ink cartridge into the ink holder and return the ink holder to the original position. d.
Page 186 28 February ’91 4. INSTALLATION PROCEDURE COLOR DRUM VT2000 --M/S/LG (Option) NOTE: There are three types of color drum units. Color Drum Type VT2000-M: For the VT2100/VT2300/VT2500 Color Drum Type VT2000-LG: For the VT2130 Color Drum Type VT2000-S: For the VT2150 1.
Page 187 28 February ’91 7. Idling a. While holding down the "0" key, press the Reset key on the opera- tion panel. b. If + D: VT2100/2130/2150) blinks, press the Reset key. 8. Test Printing a. Adjust the original guide to match the original size.
Page 188 28 February ’91 5. CASSETTE INSTALLATION PROCEDURE (Option) 1. Turn the cassette over. 2. Use a coin to loosen the 6 screws securing the side fences [A] and the rear fence [B]. 3. Move the 3 fences to the desired paper size position and tighten the 6 screws.
Page 189: Service Tables
SECTION 4 SERVICE TABLES...
Page 190: Maintenance Tables
28 February ’91 1. MAINTENANCE TABLES 1.1 LUBRICATION POINTS Lubricate after removing adhering ink and paper dust. Lubrication Point Interval Type Bearings for drum drive shaft yearly Bearing for each cam shaft yearly Bearing for main motor shaft yearly Bearing for speed reduction shaft yearly Gears on the drum drive shaft yearly...
Page 191 28 February ’91 1.3 TABLE OF PERIODIC INSPECTION (every 6 months) Item/Location Step Inspection Standard Original platen cleaning Wipe off the stain with soft cloth cover dampened with ethyl alcohol. Exposure glass cleaning Wipe with dry cloth. Mirror/Sub mirror cleaning Use blower brush.
Page 192 28 February ’91 1.4 TABLE OF PERIODIC INSPECTION (every 12 months) Item/Location Step Inspection Standard Original platen cleaning Wipe off stains with soft cloth dampened cover with ethyl alcohol. Exposure glass cleaning Wipe off the stain with soft cloth dampened with ethyl alcohol. Fluorescent lamp cleaning Wipe with dry cloth.
Page 193 28 February ’91 Item/Location Step Inspection Standard Paper feed and inspection Actually print a few sheets to ensure that delivery paper is smoothly fed and delivered without generation of skew, folds, wrinkles, etc. Original transport cleaning Wipe off paper powder with cloth roller dampened with water.
Page 194 28 February ’91 Indication Trouble Possible causes E 05 Malfunction in the image shifting 1) Encoder connector of section: the image shifting section disconnected 2) Encoder defective E 06 Mechanical lock: 1) Paper Jam When a paper jam or part failure 2) Parts failure occurs, the decoder detects that the motor speed is incorrect if this...
Page 195 28 February ’91 2. DIP SW, LED, VR TABLES 2.1 VT2300/VT2500 DIP SW (on the main control PCB) NO. DIP SW Function Remarks 1. DPS101-1 Cover Open Turn on to disable all cover safety switch functions except ADF cover safety.(Normal: OFF) 2.
Page 196 28 February ’91 2.3 VT2300/VT2500 VR NO. VR Function 1. VR-101 Main Main Motor Speed Adjustment 2. VR-102 Main 2nd Paper Exit Detection Adjustment 3. VR-103 Main Drum Master Detection Adjustment 4. VR-104 Main Master Eject Detection Adjustment 5. VR-105 Main 1st Paper Exit Detection Adjustment 6.
Page 197 28 February ’91 2.5 VT2100/VT2130/VT2150 DIP SW (on the main control PCB) DIP SW FUNCTION REMARKS Key Counter Turn on when installing Key Counter. DPS100-1 (Option) (Normal: OFF) Turn on to sound the beeper. (Normal: DPS100-2 Buzzer ON/OFF OFF) Once: OFF, Twice: ON DPS100-3 Initial Print (Normal: OFF) DPS100-4...
Page 198 28 February ’91 2.6 VT2100/VT2130/VT2150 PHOTODIODE (on the main control PCB) FUNCTION REMARKS When the main motor turns on, LED LED100 Main Motor ON lights 2nd Paper Exit LED101 When paper is detected, LED lights Detection LED102 Ink Detection When Ink is present, LED lights 1st Paper Exit LED103 When paper is detected, LED lights...
Page 199: Expected Life Of Parts
28 February ’91 2.9 EXPECTED LIFE OF PARTS NOTE: Main parts have the following expected life. Target Copy Volume Range: Avg. 50,000 prints/month. (Max. 100,000 ~ Min. 20,000 prints/month) Avg. 500 masters/month Section Part Description Expected Life Scanner Unit Fluorescent lamp 15,000 masters Original transport rollers 1 year or 6,000 masters...
Page 200: Service Program Mode
28 February ’91 3. SERVICE PROGRAM MODE (I/O Check Mode) 3.1 HOW TO ACCESS I/O CHECK MODE This program checks electrical components. The procedure for accessing the program is as follows: 1. Turn off the power switch. 2. A4 version: Remove the front cover of the master eject unit to access the Full Master Detecting switch [A].
Page 201 28 February ’91 3. Press the Memory/Class key to select either "Input" or "Output". Memory Indicator "1" ------ Input Memory Indicator "0" ------ Output 4. Use the Numeral keys to enter the desired input or output number in the copy counter. (See the Service Program Table.) 5.
Page 202 28 February ’91 3.2 SERVICE PROGRAM TABLE: VT2300/VT2500 Output Mode: COUNTER OUTPUT INDICATION 0001-0 Turns on the drum (10 rpm). 0002-0 Turns on the drum (30 rpm). 0003-0 Turns on the drum (60 rpm). 0004-0 Turns on the paper table drive motor (up). 0005-0 Turns on the paper table drive motor (down).
Page 203 28 February ’91 3.3 SERVICE PROGRAM TABLE: VT2300/VT2500 Input Mode: COUNTER INPUT INDICATION 0001-1 SN: Master Eject Detection (Indicator lights when sensor ON) 0002-1 SW: Pressure Plate Position (Indicator lights when switch ON) 0003-1 SN: 2nd Original Detection (Indicator lights when sensor ON) 0004-1 SN: Original Registration Detection (Indicator lights when sensor ON)
Page 204 28 February ’91 3.4 SERVICE PROGRAM TABLE: VT2100/VT2130/VT2150 Output Mode: COUNTER OUTPUT INDICATION 0001-0 Turns on the drum (10 rpm). 0002-0 Turns on the drum (30 rpm). 0003-0 Turns on the drum (60 rpm). 0004-0 Turns on the paper table drive motor (up). 0005-0 Turns on the paper table drive motor (down).
Page 205 28 February ’91 3.5 SERVICE PROGRAM TABLE: VT2100/VT2130/VT2150 Input Mode: COUNTER INPUT INDICATION 0001-1 SW: Master Eject Detection (Indicator lights when sensor ON) 0002-1 SW: Pressure Plate Position (Indicator lights when switch ON) 0003-1 SN: 2nd Original Detection (Indicator lights when sensor ON) 0004-1 SN: Original Registration Detection (Indicator lights when sensor ON)
Page 206: Test Pattern Image Mode
28 February ’91 4. TEST PATTERN IMAGE MODE The purpose of this mode is to distinguish whether the cause of the image problem is located before or after the image processing. Output image: The normal output of this test pattern image mode is one of the Dither matrix pattern as illustrated below.
Page 207 28 February ’91 4.1 OPERATION: (To Enter Test Pattern Image Mode) 1) Remove the front cover. 2) Turn off the DIP SW 400-7 on the image processing PCB only when the power switch is off. 3) Turn on the main switch. VT2300/VT2500 only: 4) Press the Image Mode key to select the Test Pattern Image.
Page 208 28 February ’91 5. DESIGNATED AREA CHECK MODE: VT2500 The command sheet image (designated area) and the original image can be printed at the same time to check the designated area and the positioning of the image within the designated area as follows: 1) Turn off the power switch.
Page 209 28 February ’91 Original Command Sheet Felt-tip Pen Pencil Printed image using "Fn 8" 1) The designated areas marked using a pencil are depicted by dashed lines. This is because the line marked using a pencil is low density and thin, therefore the designated area is not recognized as a closed loop even if the line on the command sheet is a closed loop.
Page 210 28 February ’91 6. OPTION/SUPPLY INTERCHANGEABILITY 0: Standard combination ∆: Usable under certain conditions (*See NOTES on page 4-23) X: Cannot be used SS810 SS830 SS930 SS950 SS915 SS935 SS955 ∆ *1 ∆ *1 ∆ *2 ∆ *2 ∆ *2 Masters Type 800 Type 900...
Page 211 28 February ’91 0: Standard combination ∆: Usable under certain conditions (See NOTES on page 4-23) X: Cannot be used VT2100 VT2130 VT2150 VT2300 VT2500 VT3500 Masters Type 800 Type 900 Type 905 VT-S VT-M VT-L Inks Black ∆ *5 Color (rd/bl/gn/br) VT-Black-800...
Page 212 28 February ’91 NOTES 1. The image density is lower than with a type 900 master; however, the ink set-off on the back side of the following pages is reduced. 2. The image density is lower than with a type 905 master; however, the ink set-off is reduced.
Page 213: Replacement And Adjustment
SECTION 5 REPLACEMENT ADJUSTMENT...
Page 214 28 February ’91 1. EXTERIOR 1.1 EXTERIOR COVER REPLACEMENT When adjusting or disassembling each sections, refer to the following procedure of how to remove the exterior covers. [A] Master feed unit cover (2 screws). Slide the scanner unit to the left. [B] Front cover (6 screws).
Page 215 28 February ’91 No Good Good [G] Front and rear original table frames (3 screws each). • Remove the operation panel cover [D] and rear cover [C] to remove the front and rear original table frames (See page 5-1). [H] Original table (6 screws). •...
Page 216 28 February ’91 2. ORIGINAL FEED SECTION 2.1 ORIGINAL FEED BELT TENSION ADJUSTMENT Purpose: To ensure proper original feed. 1. Remove the rear cover of the fluorescent lamp (2 screws). 2. Using a tension gauge, apply a 110-gram load at the center of the belt [A].
Page 217 28 February ’91 2.2 ORIGINAL PRESSURE SOLENOID ADJUSTMENT: VT2300/VT2500 6.0 -- 6.5 mm Purpose: To ensure that the originals are separated properly. 1. Remove the screw securing the stopper [A]. 2. Remove the platen plate [B] (2 screws). 3. Remove the original guide [C] (4 screws). 4.
Page 218 28 February ’91 2.3 TRANSPORT ROLLER PRESSURE ADJUSTMENT: VT2300/VT2500 Purpose : To ensure that the original does not skew 1. Set the ADF ON/OFF switch to OFF. 2. Open the scanner unit [A] and place strips of paper (45 g/m ) over the front and rear ends of the transport roller [B].
Page 219 28 February ’91 2.4 EXPOSURE GLASS REPLACEMENT 1. Slide the scanner unit to the left. 2. Open the ADF unit [A]. 3. Remove the front and rear fluorescent lamp covers (2 screws each). 4. Remove both the exposure glass leaf springs [B]. 5.
Page 220 28 February ’91 2.5 EXPOSURE LAMP / HEATER REPLACEMENT 1. Slide the scanner unit to the left. 2. Remove the front fluorescent lamp cover (2 screws). 3. Remove the front fluorescent lamp holder [A] (2 screws). 4. Disconnect the 4P heater connector [B]. 5.
Page 221 28 February ’91 2.6 ORIGINAL REGISTRATION SENSOR / 2ND ORIGINAL SENSOR REPLACEMENT Original Registration Sensor: 1. Remove the DF unit stoppers [A] (VT2100/VT2130/VT2150 only). 2. Remove the exposure glass. (See page 5-6.) 3. Remove the fluorescent lamp. (See page 5-6.) 4.
Page 222 28 February ’91 2.7 1ST ORIGINAL SENSOR REPLACEMENT: VT2300/2500 1. Remove the screw securing the stopper [A] (1 screw). 2. Remove the platen plate [B] (2 screws). 3. Remove the original guide [C] (4 screws). 4. Remove the ADF unit cover [D] (5 screws). 5.
Page 223 28 February ’91 2.8 ORIGINAL FEED ROLLERS / PULL-OUT ROLLERS REPLACEMENT: VT2300/2500 1. Remove the original table (See page 5-2). 2. Replace the pull-out rollers [A] (1 snap ring, 1 pin). 3. Remove the E-rings at the both end of the original feed roller shaft [B]. 4.
Page 224: Scanner Section
28 February ’91 3. SCANNER SECTION 3.1 OPTICAL ADJUSTMENT The only change in the optical adjustment procedure is that black level adjustment should be done first. The following table shows the reciprocal relationship between adjustment procedures. When the items listed in the left column are adjusted, the items listed in the top row must also be adjusted.
Page 225 28 February ’91 3.1.1 Preparation for Adjustment 1. Remove the original table cover. 2. Connect the terminals of the oscilloscope to the following test pins on the A/D Conversion PCB. VT2100/VT2130/VT2150 VT2300/VT2500 Terminal Test Pin Terminal Test Pin Channel 1 TP 600 Channel 1 TP 601...
Page 226 28 February ’91 3.1.2 Black Level Adjustment: VT2300/VT2500 TP 601 waveform TP 601waveform Adjust VR 2 so that the black level TP 600 standard black level is the same as the standard black level. Purpose: To ensure that the black level from the CCD output conversion/amplificationboard is the same as the standard black level (1.4 V).
Page 227 28 February ’91 3.1.3 Shading Adjustment Down The middle of the wavefrom should be higher than the ends. B ≥ 0.6A Purpose: To flatten the white level waveform. This also, corrects for distortion to the light intensity due to the output characteristics at both lamp ends and aberrations within the lens section.
Page 228 28 February ’91 3.1.4 Scan Line Position Adjustment Edge of Lower Original Guide Plate Test Chart R-21 16 mm 16 mm 1 mm Black Line Purpose: To ensure that CCD alignment is perpendicular to the original feed direction. 1. Set the test chart so that the black line is positioned 16 mm away from the edge of the lower original guide plate as shown.
Page 229 28 February ’91 3.1.5 Reading Start Position Adjustment (In The Main Scan Direction) Test Chart R-21 Center Line Line [C] L’ L = L’ Purpose: To align the center of the original with the center of the CCD so that the center of original image is positioned in the center on the master.
Page 230 28 February ’91 3.1.6 Focus Adjustment (MTF Adjustment) Test Chart R-21 8 lines/mm x 100 ≥ 48% • • Amplitude "B" (difference between white and black levels) must be a maximum Purpose: To focus the lens (focus distance between the CCD and the lens). 1.
Page 231 28 February ’91 3.1.7 Reduction Ratio Adjustment (Moire Adjustment) Cross points must be less than 6. : Upper cross points ≤ 6 : Lower cross points ≤ 6 Purpose: To adjust the focus (to set distance between the lens and the original) 1.
Page 232 28 February ’91 3.1.8 White Level Adjustment A: 2.0 ± 0.1V Purpose: To set the white level so that the background of the test chart is not copied. 1. Position the test chart so that the background area (white area) of the test chart can be read.
Page 233 28 February ’91 3.2 IMAGE MAGNIFICATION ADJUSTMENT (In The Sub-scan Direction) DIP SW400 Purpose: To ensure that the image magnification lengthwise is 100 % ± 0.5 % when using the full size mode. 1. Press the Full Size (100 %) key. 2.
Page 234 28 February ’91 4. IMAGE SHIFTING SECTION 4.1 ENCODER MOUNTING POSITION ADJUSTMENT Purpose: To ensure that the image is positioned in the middle when the Image Shifting key is set at the center "0". 1. Remove the rear cover of the machine. 2.
Page 235 28 February ’91 5. Disconnect the connector [D] of the encoder. 6. Insert the gauge [A] into the hole of the gear [E]. 7. Turn on the LED "--2" of the Image shift indicator on the operation panel. Then gradually turn the shaft of the encoder [B] in the "0" position direction and stop it as soon as the "0"...
Page 236: Master Feed Section
28 February ’91 5. MASTER FEED SECTION 5.1 THERMAL HEAD VOLTAGE ADJUSTMENT Purpose: To maintain master making quality and extend the lifetime of the thermal head. NOTE: This adjustment is always required when the thermal head or power supply PCB is replaced. 1.
Page 237: Belt Tension Adjustment
28 February ’91 5.2 BELT TENSION ADJUSTMENT 2.2 -- 3.7 mm 1.2 -- 1.8 mm Purpose: To ensure that correct master feed motor rotation is transmitted to each roller. Platen Roller Drive Belt: 1. Turn off the main switch. 2. Remove the master feed unit from the machine. 3.
Page 238 28 February ’91 5.3 RIGHT AND LEFT CUTTER SWITCH ADJUSTMENT 0.1 -- 0.5 mm Purpose: To ensure that the cutter slider stops properly. 1. Turn off the main switch. 2. Remove the cutter unit (2 screws). 2. Remove the cutter unit cover (4 screws). 4.
Page 239 28 February ’91 5.4 REVERSE ROLLER SOLENOID ADJUSTMENT 0.5 -- 1 mm Purpose: To ensure proper operation of the reverse roller clutch. 1. Turn off the main switch. 2. Remove the master feed unit. 3. Adjust the solenoid [A] position so that there is 0.5 to 1 mm clearance between the stopper [B] and the gear [C] when the solenoid is energized.
Page 240: Cutter Replacement
28 February ’91 5.5 CUTTER REPLACEMENT 1. Turn off the main switch. 2. Slide the scanner unit to the left. 3. Disconnect the 6P connector [A]. 4. Remove the cutter unit [B] (2 screws). 5. Remove the cutter unit cover [C] (4 screws). 6.
Page 241 28 February ’91 5.6 MASTER BUCKLE SENSOR REPLACEMENT 1. Turn off the main switch. 2. Slide the scanner unit to the left. 3. Remove the master roll. 4. Remove the cutter unit [A] (2 screws). 5. Disconnect the buckle sensor connector [B]. 6.
Page 242: Thermal Head Replacement
28 February ’91 5.7 THERMAL HEAD REPLACEMENT: 1. Turn off the main switch. 2. Slide the scanner unit to the left. 3. Remove the master roll. 4. Remove the thermal head cover [A] (3 screws). 5. Remove the platen roller [B] (2 knob screws). 6.
Page 243 28 February ’91 5.8 THERMAL HEAD DRIVE BOARD REPLACEMENT 1. Turn off the main switch. 2. Remove the master feed unit from the machine. 3. Remove the bottom plate [A] of the master feed unit. 4. Disconnect the 5 connectors (a to e). 5.
Page 244 28 February ’91 6. MASTER EJECT SECTION 6.1 MASTER EJECT SOLENOID ADJUSTMENT Purpose: To ensure that master is ejected. 1. Open the master eject unit and remove the upper cover of the master eject unit (4 screws). 2. Access I/O check mode (See page 4-11), and eEnter "0" in the memory display and "7"...
Page 245 28 February ’91 6.2 PRESSURE PLATE POSITION SWITCH ADJUSTMENT 0.1 ~ 0.5 mm Purpose: To ensure that the pressure plate stops at the proper position. 1. Open the master eject unit and remove the front cover of the master eject unit (3 screws).
Page 246 28 February ’91 6.3 FULL MASTER SWITCH ADJUSTMENT [D] [B] 0.1 ~ 0.5 mm Purpose: To ensure that the full master detecting switch turns on when the master eject box is filled to capacity with ejected masters. 1. Open the master eject unit and remove the front cover of the master eject unit (3 screws).
Page 247 28 February ’91 6.4 MASTER EJECT SENSOR ADJUSTMENT: VT2300/VT2500 Purpose : To ensure that the sensor detects the ejected master. 1. Make a master that has a solid black area. The solid black area should be approx. A7 size (74 x 105 mm/3" x 4") a.
Page 248 28 February ’91 5-35...
Page 249 28 February ’91 6.5 MASTER EJECT UNIT REPLACEMENT 1. Turn off the main switch. 2. Remove the master eject unit cover [A] (2 screws). 3. Disconnect the connector [B]. 4. Pull out the shaft [C]. 5. Carefully remove the master eject unit. 5-36...
Page 250 28 February ’91 6.6 MASTER EJECT BELT/ROLLER REPLACEMENT [A] [G] 1. Remove the master eject unit. (See page 5-36.) 2. Remove the 2 springs [A] on both sides. 3. Remove the upper shaft [B] (2 E-rings). 4. Remove the lower shaft [C] (2 E-rings). 5.
Page 251 28 February ’91 7. PAPER FEED SECTION 7.1 PAPER TABLE SAFETY SWITCH ADJUSTMENT 0.3 -- 0.5 mm Purpose: To ensure that the paper table safety switch turns on to prevent the paper table from going up when the paper table is closed. 1.
Page 252 28 February ’91 7.2 PAPER TABLE HEIGHT ADJUSTMENT 148±0.5 mm Purpose: To ensure smooth paper feed. 1. Set the paper feed pressure adjusting lever to the upper position. 2. Remove the front cover of the machine. 3. Access I/O check mode (See page 4-11). Enter "0"...
Page 253 28 February ’91 7.3 PAPER FEED ROLLER PRESSURE ADJUSTMENT Purpose: To ensure that the paper feed roller exerts sufficient pressure for smooth printing paper feed (weight range 50 g/m to 215 g/m <Step 1> 1. Loosen the screw [A] securing the lower adjusting plate [B]. NOTE: When loosing the screw, hold the lower adjusting plate in the original position for fine adjustment.
Page 254 28 February ’91 250±5 g 100 g <Step 2> This procedure should only be used when the proper pressure cannot be achieved in step 1. 1. Stack about 100 sheets of 65 g/m paper on the paper table. Lift up the paper table until it stops automatically.
Page 255 28 February ’91 7.4 SEPARATION PLATE PRESSURE ADJUSTMENT: VT2300/VT2500 [A]: Strong [B]: Factory Setting [C]: Weak Purpose : To adjust the separation plate pressure for the type of paper being used by the customer 1. Adjust the separation plate pressure by turning the adjusting screw [D]. NOTE: Position the minus groove on the screw head vertically horizontally .
Page 256 28 February ’91 7.5 LOWER GUIDE PLATE ADJUSTMENT 0 -- 0.1 mm Purpose: To ensure a smooth paper feed excluding paper jams, folds, or wrinkles. 1. Make sure that the distance between the lower guide plate [A] and the lower second feed roller [B] is 0 to 0.1 mm as shown. 2.
Page 257 28 February ’91 7.6 UPPER SECOND FEED ROLLER ADJUSTING 0.05 -- 0.1 mm Purpose: To ensure that paper is fed between the drum and the pressure roller without skewing. 1. Remove both front and rear covers. 2. Move the second feed roller sector gear fully clockwise, so that the upper second feed roller [A] contacts the lower second feed roller.
Page 258 28 February ’91 7.7 PAPER FEED ROLLER FEED-LENGTH ADJUSTMENT 93 -- 97 mm Purpose: To ensure paper feed to the second paper feed roller. 1. Stack about 100 sheets of 65 g/m paper on the paper table. 2. Set the paper feed roller pressure adjusting lever in the upper position. 3.
Page 259 28 February ’91 7.8 PAPER FEED SECTOR GEAR STOPPER CLEARANCE ADJUSTMENT 0.1 -- 0.5 mm 0.1 -- 0.3 mm Purpose: To ensure that the paper feed roller starts rotating when the paper feed solenoid turns on and stops rotating when the paper feed solenoid turns off.
Page 260 28 February ’91 7.9 SECOND FEED ROLLER SECTOR STOPPER CLEARANCE ADJUSTMENT 0.1 -- 0.3 mm Purpose: To ensure that the second feed roller starts rotating when the paper feed solenoid turns on and stops rotating when the paper feed solenoid turns off. 1.
Page 261 28 February ’91 7.10 SECOND FEED ROLLER FEED LENGTH ADJUSTMENT 85±5 mm Press Roller Purpose: To ensure paper feed between the drum and the pressure roller. 1. Remove the drum unit and the rear cover from the machine. 2. Stack about 100 sheets of 65 g/m paper on the paper table.
Page 262 28 February ’91 7.11 SECOND FEED ROLLER FEED TIMING ADJUSTMENT Purpose: To ensure paper feed by regulating the start timing of the second feed roller. 1. Stack about 100 sheets of 65 g/m paper on the table. 2. Set the paper feed roller pressure lever in the upper position. 3.
Page 263: Paper Feed Roller Replacement
28 February ’91 7.12 PAPER FEED ROLLER REPLACEMENT 1. Remove the left clamper [A]. 2. Remove the left bushing [B]. 3. Remove the paper feed roller shaft [C]. 4. Remove the 2 paper feed rollers [D]. 5-50...
Page 264 28 February ’91 7.13 PAPER FEED ROLLER UNIT REPLACEMENT 1. Remove 2 hexagon screws [A]. 2. Remove the clampers [B]. 3. Remove the upper paper feed roller unit from the machine by sliding the shaft to rear. 5-51...
Page 265 28 February ’91 7.14 UPPER SEPARATION ROLLER REPLACEMENT 1. Remove the paper feed roller unit from the machine (See page 5-51). 2. Remove the bushing [A]. 3. Remove the paper guide disks [B]. 4. Remove the upper separation roller [C]. 5-52...
Page 266 28 February ’91 7.15 SEPARATION PLATE / LOWER SEPARATION ROLLER REPLACEMENT Separation Plate: 1. Remove the separation plate [A] with the spring [B] located under the separation plate (1 screw). Lower Separation Roller: 1. Remove the paper feed roller unit from the machine (See page 5-51). 2.
Page 267 28 February ’91 8. PRINTING SECTION 8.1 PAPER DETECTING ARM CLEARANCE ADJUSTMENT 0.2 ~ 0.4 mm Purpose: To ensure that printing pressure is applied during paper feed, and is released correctly afterwards. 1. Remove the rear cover of the machine. 2.
Page 268 28 February ’91 8.2 PRESSURE ROLLER POSITION ADJUSTMENT Drum 0.6 -- 1.0 mm Purpose: To ensure that the pressure roller does not contact the clamper section of the drum. 1. Remove the rear cover of the machine. 2. Using a spanner (10 mm), turn the drum rotation shaft counterclockwise and position the bearing of the pressure release arm [A] on top of the pressure cam [B].
Page 269 28 February ’91 8.3 PRESSURE TIMING ADJUSTMENT Purpose: To ensure that the maximum printing area is within specifications, and that the ink does not stain the trailing edge. 1. Stack about 100 sheets of 65 g/m paper on the table. 2.
Page 270: Printing Pressure Adjustment
28 February ’91 8.4 PRINTING PRESSURE ADJUSTMENT Standard Setting: 5 mm for VT2100/VT2300/VT2500 10 mm for VT2130/VT2150 Purpose: To make better print results without decreasing the run length. 1. Remove the rear cover of the machine. 2. Adjust the clearance [A] to be 5 mm for VT2100/VT2300/VT2500 (10 mm for VT2130/VT2150) by turning the adjusting bolt [B].
Page 271 28 February ’91 8.5 PRINTING PRESSURE STOPPER CLEARANCE ADJUSTMENT 1 ~ 2 mm Purpose: To ensure that printing pressure stopper is released when paper feed start, and is locked within one drum rotation when a paper jam occurs. NOTE: Perform this adjustment after adjusting the clearance of the paper detecting arm.
Page 272: Pressure Roller Replacement
28 February ’91 8.6 PRESSURE ROLLER REPLACEMENT 1. Remove a screw [A]. 2. Remove the holding plate [B]. 3. Remove the pressure roller [C]. 4. Remove both right and left bearings [D] (2 E-rings). 5-59...
Page 273 28 February ’91 9. DRUM SECTION 9.1 MAIN DRIVE BELT TENSION ADJUSTMENT 1.5 mm Purpose: To ensure that correct main motor rotation is transmitted to the drum. 1. Remove the rear cover of the machine. 2. Apply a 1000-gram load using a tension gauge to the center of the main drive belt [A].
Page 274 28 February ’91 9.2 DRUM ROTATION SENSOR ADJUSTMENT 8±1 mm Purpose: To ensure correct main motor speed detection. 1. Remove the rear cover of the machine. 2. Make sure that the drum rotation sensor [A] is positioned so that the pulse disk [B] is inserted into the sensor by 8 ±...
Page 275: Printing Speed Adjustment
28 February ’91 9.3 PRINTING SPEED ADJUSTMENT: VT2300/VT2500 Main Control Board Purpose: To set the maximum speed at 120 ± 10 rotations/minute. 1. Press the Speed Change key to set the speed at the maximum level. 2. Press the reset key while pressing the "0" key and make sure that the drum rotation speed is 120 ±...
Page 276 28 February ’91 9.4 DRUM STOPPER ADJUSTMENT ±1 mm Purpose: To ensure that the drum is securely locked when the drum unit is pulled out. 1. Press the Drum Rotation button to stop the drum at the home position for drum replacement.
Page 277 28 February ’91 9.5 MASTER FEED CLAMPER CAM ADJUSTMENT ON= 29±0.5 mm OFF= less than 25 mm Purpose: To ensure that the master feed clamper is opened during the master feed process and is closed during other processes. 1. Remove the drum unit from the machine and open the master eject unit. 2.
Page 278 28 February ’91 9.6 MASTER EJECT CLAMPER CAM ADJUSTMENT ON= 29±0.5 mm OFF= less than 25 mm Purpose: To position the master eject clamper cam so that the master clamper opens correctly during the master eject process and closes correctly for all other processes. 1.
Page 279 28 February ’91 9.7 INK DETECTING PIN POSITION ADJUSTMENT 7±1 mm Purpose: To ensure detection of ink built-up between the ink roller and the doctor roller. 1. Remove the drum unit. 2. Remove the master clamper. 3. Remove the tetron screen and the metal screens from the drum unit. 4.
Page 280 28 February ’91 9.8 DOCTOR ROLLER CLEARANCE ADJUSTMENT 0.08 mm Purpose: To equalize the ink thickness around the ink roller and prevent uneven image. 1. Remove the drum unit. 2. Remove the master clamper. 3. Remove tetron screen and the metal screens from the drum unit. 4.
Page 281 28 February ’91 9.9 INK ROLLER UNIT POSITION ADJUSTMENT Purpose: To ensure that the pressure of the pressure roller is applied evenly to the ink roller (the difference in distance from the center to either end should be less ± 0.5 mm). 1.
Page 282 28 February ’91 9.10 INK SUPPLY SOLENOID POSITION ADJUSTMENT 0.5 -- 1 mm Purpose: To ensure that the clutch sleeve is released by the stopper when the ink supply solenoid [A] turns on. 1. Remove the drum unit from the machine. 2.
Page 283 28 February ’91 9.11 DRUM LOCK SOLENOID ADJUSTMENT: VT2300/VT2500 0 ~ 0.3 mm Solenoid OFF Solenoid ON Purpose : To prevent the drum unit from being removed when it is not at the original drum position. 1. Install the drum unit in the machine. 2.
Page 284 28 February ’91 9.12 MASTER DETECTING SENSOR ADJUSTMENT: VT2300/VT2500 1. Remove the front cover. 2. Remove the master [A] from the drum. Then, confirm that the voltage between TP101 and GND (CN103-5) is 0.9±0.1V when no master is on the drum. 3.
Page 285: Ink Detection Adjustment
28 February ’91 9.13 INK DETECTION ADJUSTMENT VR901 (Standard Signal) [B ] +0.5 4 µsec µsec (Detection Signal) TP--12 Purpose: To ensure correct detection of a no ink condition when all the ink has been consumed. 1. Remove the rear cover of the machine. 2.
Page 286: Screen Replacement
28 February ’91 9.14 SCREEN REPLACEMENT 1. Remove the drum unit from the machine. 2. Remove the 2 springs [A]. 3. Remove the front screen plate [B] (2 screws). 4. Remove the tetron screens [C] from the drum. 5. Remove the front screen plate [D] and the rear screen plate [E]. 5-73...
Page 287: Drum Drive Belt Replacement
28 February ’91 9.15 DRUM DRIVE BELT REPLACEMENT Removal: 1. Set the image position to "0" by turning off and on the main switch. 2. Turn off the main switch and unplug the power supply cord. 3. Remove the drum unit. 4.
Page 288 28 February ’91 VT2100/2130/2150 Only: 8. Remove the drive gear [A] and the bearing (2 Allen screws). NOTE: It is not necessary to remove the drive gear on the VT2300 and the VT2500 because these models use a timing relay belt [B]. 9.
Page 289 28 February ’91 Assembly: 1. Install the pressure cam drive gear [A]. NOTE: Make sure that the top part of the pressure cam points to the right [B]. 2. Install the relay gear assembly [C]. 3. Install the relay belt [D] (VT2300/VT2500 only). 4.
Page 290 28 February ’91 7. Install the belt tension bearings [A] (1 E-ring). 8. Adjust the position of both feed cams [B] by inserting a long screwdriver [C] as shown through the holes in the feed cams and the rear side plate. 9.
Page 291: Paper Delivery
28 February ’91 10. PAPER DELIVERY 10.1 FIRST PAPER EXIT SENSOR ADJUSTMENT VT2300/VT2500 Main Control Board Purpose : To ensure that the sensor detects correct paper delivery and that the jam indicator blinks after an exit misfeed or a paper wrap occurs.
Page 292 28 February ’91 10.2 SECOND PAPER EXIT SENSOR ADJUSTMENT VT2300/VT2500 Main Control Board Purpose : To ensure that the sensor detects correct paper delivery and that the jam indicator blinks and the machine stops when a paper wrap or exit misfeed occurs 1.
Page 293 28 February ’91 10.3 EXIT PAWL CLEARANCE ADJUSTMENT 0.3 -- 0.5 mm Purpose: To ensure that the printing paper is delivered without paper wrap or damage to the screen. 1. Remove the rear cover of the machine. 2. Manually turn on the paper feed and the printing pressure solenoids. Using a spanner (10 mm), gradually rotate the drum rotation shaft counterclockwise to move the exit pawl [A] to the drum.
Page 294: Exit Pawl Timing Adjustment
28 February ’91 10.4 EXIT PAWL TIMING ADJUSTMENT Purpose: To ensure that the exit pawl does not contact the master clamper. 1. Remove the rear cover of the machine. 2. Press the Image Shifting key to give a maximum white area at the paper leading edge (image shift position set to "--2").
Page 295 28 February ’91 10.5 DELIVERY TABLE REPLACEMENT 1. Open the delivery table. 2. Remove the leaf spring [A] for GND located under the table (1 screw) 3. Remove the stoppers [B] (2 screws each). 4. Remove the delivery table. 5-82...
Page 296: Vacuum Unit Replacement
28 February ’91 10.6 VACUUM UNIT REPLACEMENT 1. Remove both front and rear covers of the machine. 2. Remove the antistatic brush bracket [A] (4 screws). 3. Remove the harness clamp [B] (1 screw). 4. Disconnect the sensor connectors [C]. 5.
Page 297 28 February ’91 10.7 DELIVERY BELT/PAPER EXIT SENSORS REPLACEMENT 1. Remove the vacuum unit (See page 5-83). 2. Remove the 2 screws [A] securing the vacuum guide plate. 3. Remove the tension roller [B] (2 screws). 4. Remove the bearing [C] (1 E-ring). 5.
Page 298: Vacuum Motor Replacement
28 February ’91 10.8 VACUUM MOTOR REPLACEMENT 1. Remove the vacuum unit (See page 5-83). 2. Turn the vacuum unit [A] over. 3. Loosen the 4 hexagon bolts [B]. 4. Remove the vacuum motor [C]. 5-85...
Page 299: Troubleshooting
SECTION 7 TROUBLESHOOTING...
Page 300 28 February ’91 1. ELECTRICAL COMPONENT TROUBLE Component Condition Phenomenon 10 A Fuse Machine does not work. (No indicators on the Open (Power Supply PCB) operation panel turn on.) 2.5 A Fuse Cover open indicator blinks when the main switch Open (AC Drive PCB) is turned on.
Page 301 28 February ’91 Component Condition Phenomenon 2nd Original Sensor When the main switch is turned on, the jam ON condition indicators "A" and blink and reset is (Not interrupted) impossible. The original is not inserted automatically, and the jam indicators "A" and blink when the Master Making key is pressed (VT2100/2130/2150).
Page 302 28 February ’91 Component Condition Phenomenon Paper Table Height When the paper feed table goes up, it does not ON condition Sensor stop at the proper position and E-02 lights. (Interrupted) The paper feed table does not go up. When OFF condition printing starts, jam indicators "B"...
Page 303 28 February ’91 Component Condition Phenomenon Right Cutter Switch ON condition Master is not cut. (Cutter unit does not move at (Rear) (Feeler is all.) actuated) OFF condition When the master is cut, indicator "E-01" lights. At (Feeler is not that time the cutter does not return to the front.
Page 304 28 February ’91 VT2300/VT2500 only: Component Condition Phenomenon Paper Size Detection * A4 : Master making length is 247mm Always ON Sensor 1 (B5 lengthwise). (Paper * LT : Master making length is 10.6" detected) (LT lengthwise). * A4 : Master making length is 172mm OFF (Paper (B5 sideways).
Page 305 28 February ’91 A4 version : Paper Size Detection Sensor Image Length (Master Making Length) 172 mm 247 mm 287 mm 354 mm LT version : Paper Size Detection Sensor Image Length (Master Making Length) 8.1" 10.6" 13.6" 13.9" (205.9mm) (269.4mm) (345.6mm) (354mm)
Page 306: Image Trouble
28 February ’91 2. TROUBLESHOOTING 2.1 IMAGE TROUBLE 1. No image, white lines, uneven image on copy Does the image created on the master match the original? Not enough ink supplied to the drum? No ink supplied even though ink supply solenoid is energized? Check the ink supply mechanism.
Page 307 28 February ’91 Are you using the new VT master? (more sensitive) Use the VT master. Has the platten roller been mounted correctly on the thermal head? Tighten the two knobs securing the platten roller and adjust the platten roller pressure evenly. Make prints in Test Pattern mode and check the image.
Page 308 28 February ’91 2. Print image is enlarged or reduced in the paper feed direction Original Lengthened Shortened Is the print image larger than the original in the paper feed direction? Is the original transport motor functioning normally? Check the original transport motor. Are the drive belts in the original feed section adjusted to the correct tension? Adjust the belt tension.
Page 309 28 February ’91 Are any of the pulleys and/or gears in the original feed section loose? Tighten the screws securing the pulleys and/or the gears. 7-10...
Page 310: Paper Feed Trouble
28 February ’91 2.2 PAPER FEED TROUBLE 1. No paper is fed from the paper table. Are the paper feed rollers turning normally? Does the paper feed table raise when the Print Start key is pressed? Check the paper table drive motor, paper height sensor, and AC drive board.
Page 311 28 February ’91 Is the one-way clutch on the paper feed roller shaft slipping? (Paper is often not fed forward at high printing speeds.) Lightly sand the roller shaft surface with fine sandpaper (increases the coefficient of friction) and replace the clutch. 7-12...
Page 312 28 February ’91 2. Paper leading edge jams under the second feed roller. Does the upper second feed roller contact the lower second feed roller and are both rollers tuning normally? Is the second feed sector gear turning normally? Check the clearance between the second feed sector gear stopper and the stopper pin.
Page 313 28 February ’91 3. Paper leading edge jams under the drum. Is the printing pressure correctly applied to the drum? Does the printing pressure solenoid turn on? Check the solenoid in I/O check mode. Is the clearance between the printing pressure stopper and the stopper pin correct? Adjust the clearance.
Page 314 28 February ’91 4. Paper frequently jams or is not fed during high speed printing. (Does not occur at low printing speeds.) . Is the surface of the paper feed roller damaged or defective? Replace the roller. (See page 5-51.) Is the timing belt of the paper feed roller slipping? Adjust the belt tension.

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Priport vt 2100 Priport vt 2130 Priport vt 2150 Priport vt 2300 Priport vt 2500

Ricoh PRIPORT VT 2000 Series Service Manual

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