Page 1 SERVICE MANUAL Published in Oct. ’01 842BA110...
Page 2 CAUTION Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer’s instructions. CAUTION Double-pole/neutral fusing.
Page 3: Safety Precautions
Safety precautions This booklet provides safety warnings and precautions for our service personnel to ensure the safety of their customers, their machines as well as themselves during maintenance activities. Service personnel are advised to read this booklet carefully to familiarize themselves with the warnings and precautions described here before engaging in maintenance activities.
Page 4: Safety Warnings And Precautions
Safety warnings and precautions Various symbols are used to protect our service personnel and customers from physical danger and to prevent damage to their property. These symbols are described below: DANGER: High risk of serious bodily injury or death may result from insufficient attention to or incorrect compliance with warning messages using this symbol.
Page 5: Installation Precautions
1. Installation Precautions WARNING • Do not use a power supply with a voltage other than that specified. Avoid multiple connections to one outlet: they may cause fire or electric shock. When using an extension cable, always check that it is adequate for the rated current..................... •...
Page 6: Precautions For Maintenance
2. Precautions for Maintenance WARNING • Always remove the power plug from the wall outlet before starting machine disassembly....• Always follow the procedures for maintenance described in the service manual and other related brochures............................• Under no circumstances attempt to bypass or disable safety features including safety mechanisms and protective circuits.
Page 7 • Do not pull on the AC power cord or connector wires on high-voltage components when removing them; always hold the plug itself....................... • Do not route the power cable where it may be stood on or trapped. If necessary, protect it with a cable cover or other appropriate item.
Page 8: Table Of Contents
2BA/B CONTENTS 1-1 Specifications 1-1-1 Specification ............................1-1-1 1-1-2 Part names and functions ........................1-1-4 (1) Main unit ............................1-1-4 (2) Operation panel ..........................1-1-6 1-1-3 Print process ............................1-1-7 1-1-4 Machine cross sectional view ....................... 1-1-8 1-1-5 Machine drive system .......................... 1-1-9 (1) Drive system 1 (driven by the paper feed motor) ................
Page 9 2BA/B (13) Image is partly missing....................... 1-5-22 (14) Fixing is poor..........................1-5-22 (15) Image is out of focus........................1-5-23 (16) The center of the image is misaligned with the print image............1-5-23 (17) One forth the A0 width of the image is white................1-5-24 (18) One forth the A0 width of the image is black.
Page 10 2BA/B 1-6-4 Image formation section ........................1-6-11 (1) Replacing the drum ........................1-6-11 (2) Cleaning the drum: reference ..................... 1-6-13 (3) Checking the drum surface potential ..................1-6-14 (4) Replacing the main charger wire ....................1-6-15 (5) Replacing the transfer/separation charger wire ................1-6-17 (6) Replacing the transfer wire ......................
Page 11 2BA/B 2-2 Electrical Parts Layout 2-2-1 Electric parts layout ..........................2-2-1 (1) PCBs ............................. 2-2-1 (2) Switches and sensors ........................2-2-2 (3) Motors ............................2-2-4 (4) Clutches and heaters ........................2-2-5 (5) Others ............................2-2-6 2-3 Operation of the PCBs 2-3-1 Power source PCB ..........................
Page 12: Specifications
2BA/B 1-1-1 Specification Type ..........Console type Printing system ....... Indirect electrostatic Paper ..........Plain paper: 64 – 80 g/m (fed from the roll unit or bypass table) Special paper: Vellum, film (fed from the roll unit or bypass table) Paper roll width: 210 –...
Page 13 2BA/B <Software Operating Environment> • Printer drivers IBM PC-AT or compatible Windows 95 Windows 98 Windows Me Windows NT 4.0 (with Service Windows 2000 (OSR2) Pack 5 or later installed) i486DX2 66MHz Pentium 150MHz i486DX2 66MHz Pentium 166MHz 16MB 32MB 16MB 24MB Free hard disk space...
Page 14 2BA/B • Print Utility (recommended operating environment) IBM PC-AT or compatible Windows 95 Windows 98 Windows Me Windows NT 4.0 (with Service Windows 2000 (OSR2) Pack 5 or later installed) Pentium 200MHz or faster Pentium II 300MHz or faster 64MB or more 128MB or more Free hard disk space 100MB...
Page 15: Part Names And Functions
2BA/B 1-1-2 Part names and functions (1) Main unit Figure 1-1-1 1 Operation panel 7 Front covers 2 Eject cover 8 Paper trays 3 Ejection release levers 9 Paper tray support plates 4 Main unit release levers 0 Main switch 5 Bypass tables ! Total counter 6 Bypass guide...
Page 16 2BA/B ¤ ⁄ › & ‹ ﬁ ﬂ ﬂ ﬁ Figure 1-1-2 @ Flanges ⁄ Waste toner tank # Network interface connector ¤ Toner replenishing slot screw $ Right cover ‹ Upper, middle and lower roll unit % Toner replenishing slot heater switches ^ Toner replenishing slot screw ›...
Page 17: Operation Panel
2BA/B (2) Operation panel Figure 1-1-3 1 Ready indicator 9 Start key 2 Data indicator 0 Enter key 3 Attention indicator ! */Menu key 4 On Line key @ Internal paper jam indicator 5 Message display # Manual feed indicator 6 Cursor keys $ Upper roll unit indicator 7 Roll Cut key...
Page 18: Print Process
2BA/B 1-1-3 Print process Static latent Main charging image formation Developing Toner Fixing Drum Paper Transfer Separation Figure 1-1-4 Print process 1-1-7...
Page 19: Machine Cross Sectional View
2BA/B 1-1-4 Machine cross sectional view Paper conveying path * The upper roll unit is optional. Figure 1-1-5 Machine cross sectional view 1 Optical section 4 Cleaning section 2 Developing section 5 Fixing section 3 Image formation section 6 Paper feed/conveying section 1-1-8...
Page 20: Machine Drive System
2BA/B 1-1-5 Machine drive system (1) Drive system 1 (driven by the paper feed motor) Figure 1-1-6 1 Paper feed motor gear 17 Bypass feed clutch 33 Roll unit belt* 2 Gear 82/35 18 Bypass registration clutch 34 Drum tension pulley* 3 Idle pulley 25/45 19 Pre-transfer drive pulley 32 35 Idle pulley 21*...
Page 21 2BA/B 49 Pre-transfer drive pulley 32 80 Flange pulley 36 50 Flange pulley 36 81 Roll winding drive belt 51 Roll winding drive belt 82 Drive tension pulley 52 Drive tension pulley 83 Idle pulley 32/36 53 Idle pulley 32/36 84 Idle gear 30 54 Idle gear 30 85 Lower roll winding clutch...
Page 22: Drive System 2 (Driven By The Drum Motor And Fixing Motor)
2BA/B (2) Drive system 2 (driven by the drum motor and fixing motor) Figure 1-1-7 1 Drum motor gear 40 & Transfer drive gear 32 2 Drum drive pulley 17 * Drive tension pulley 3 Drum drive gear 40 ( Cleaning section drive belt 4 Drum drive belt ) Fixing motor gear 5 Cleaning section drive pulley 36/22...
Page 23: Drive System 3 (Driven By The Main Motor And Toner Motor)
2BA/B (3) Drive system 3 (driven by the main motor and toner motor) 1 Pre-transfer drive gear 22 2 Pre-transfer gear 30 3 Idle gear 20 4 Idle gear 20 5 Idle gear 20 6 Post-developing gear 25 7 Gear 18 8 Gear 17 9 Drum joint 0 Drum flange...
Page 24: Handling And Storage Of The Drum
2BA/B 1-2-1 Handling and storage of the drum Use the following caution when handling the drum. • When removing the drum from the main unit, make sure not to expose it to direct sunshine or strong lighting. • Store the drum where the ambient temperature is kept between –20°C/–4°F and 40°C/104°F and humidity not higher than 85% RH.
Page 25: Installation Environment
2BA/B 1-2-5 Installation environment 1. Temperature: 10°C – 35°C/50°F – 95°F 2. Humidity: 15% – 85% RH 3. Power source: 120 V AC, 14 A/230 V AC, 7 A 4. Power source frequency stability: 50 Hz ± 0.3%/60 Hz ± 0.3% 5.
Page 26: Unpacking And Installing The Printer
2BA/B 1-3-1 Unpacking and installing the printer (1) Installation procedure Start Unpack the printer. Attach the Paper trays and Paper tray support plates. Remove the retaining tapes. Attach the bypass guides. Remove the cushion. Set the developer. Attach the cleaning unit. Make the initial developer setting (maintenance item U130).
Page 27 2BA/B Unpack the printer. Figure 1-3-1 Printer package 1 Machine body # Top board ﬁ Vinyl bag 2 Paper trays $ Props ﬂ Polyethylene bag 3 Roll flanges % Skid ‡ Operation guide 4 Main unit support assemblies ^ Dust cover °...
Page 28 2BA/B Remove the retaining tapes. Power cord 1. Remove the tape retaining the air cap bag. Air cap bag 2. Remove the two tapes retaining the power cord and then the tape binding the cord. (For 120 V specifications only) 3.
Page 29 2BA/B Attach the cleaning unit. Screw Cleaning unit 1. Remove the screw from each of the right and left retention stoppers cleaning unit retention stoppers. 2. Slide the right and left cleaning unit retention Screw stoppers inward and release the cleaning unit. Figure 1-3-5 3.
Page 30 2BA/B Set fixing pressure. 1. Set fixing pressure by rotating the fixing pressure adjustment nuts at the front and rear of the fixing unit clockwise until they are tight. Fixing pressure adjustment nut Fixing pressure adjustment nut Figure 1-3-8 2. Push in the main unit release levers until closing the detachable unit.
Page 31 2BA/B Adjust the horizontal level of the printer. 1. Place three levels on the center, right and left of the machine body and check that the unit is level in all directions. 2. After any leveling adjustments, reattach the main unit support assembly covers using one screw for each cover. 3.
Page 32 2BA/B Attach the paper trays and paper tray support plates. 1. Attach the paper tray support plates to the front covers with the projections on the paper tray support plates fitting into the grooves on the front covers. Groove Projection Paper tray support plates Figure 1-3-12 2.
Page 33 2BA/B Set the developer. Screw Screws Toner 1. Open the toner replenishing slot. Connector replenishing 2. Remove the screw, the connector protec- protective cover slot tive cover and then the 5-pin connector. * Always turn the main switch off before removing and connecting the 5-pin 5-pin connector connector.
Page 34 2BA/B 6. Align the developing unit with the guide and Developing unit Developing unit securing lever securing lever insert into the main unit. Guide Guide 7. Lower the developing unit securing lever until it locks, and connect the right and left connectors. Developing unit 1-pin...
Page 35 2BA/B Make the initial developer setting (maintenance item U130). 1. Pull the main unit release levers. Turn the main switch on while the detachable unit is open and enter the maintenance mode (see page 1-4-1). 2. Push in the main unit release levers until closing the detachable unit. 3.
Page 36 2BA/B Coat the cleaning blade with toner (maintenance item U160). 1. Select “160” using the cursor up/down keys and press the Start key. 2. Select “Execute” using the cursor up/down keys and press the Start key. 3. Pull the main unit release levers to open the detachable unit.
Page 37: Print Mode Initial Settings
2BA/B 1-3-2 Print mode initial settings The factory settings for this machine are as shown below. Maintenance Contents Setting at factory item No. U256 Auto Preheat Time U267 Adjusting the cutting length for the paper leading edge Temp Change U269 Selecting the timing for total counting During Feed U271...
Page 38: User Settings
2BA/B 1-3-3 User Settings The user can make default settings that determines how the printer acts when the main switch is turned on . Default settings are categorized as “Set Machine” that determine the printer’s basic operations and “Set Printer” which determine operability.
Page 39: Making Default Settings
2BA/B (2) Making default settings Machine default Items common to user/manager Paper width Paper type [Paper material] 1. Select a paper source and press the Enter key. First turn “ON” Paper working. 2. Select between “Auto size” and “Input size”, 1.
Page 40: Installation Of The Upper Roll Unit (Option)
2BA/B 1-3-4 Installation of the upper roll unit (option) Procedure 1. Open the front covers and lift up the right and left front cover stoppers to remove them from the front covers. Front cover stopper Front covers Figure 1-3-23 2. Slide the right and left front cover stoppers to remove them from the main body of the machine.
Page 41 2BA/B 5. Remove the five screws to remove the left side cover. 6. Close the detachable unit. Screw Detachable unit Left side cover Screws Screws Figure 1-3-26 7. Remove the two screws to remove the roll drive cover. Roll drive cover Screws Figure 1-3-27...
Page 42 2BA/B 9. Fit the tension plate paper feed assembly Tension plate using a drum lift pin. paper feed assembly 10. Fit the blade spring to the tension plate paper feed assembly and the drum motor assembly. Drum lift pin Drum motor assembly Blade spring Figure 1-3-29...
Page 43 2BA/B 120V models only 14. Pull out the roll unit of the main body, fit the Roll guide plate upper roll unit heater to the roll guide plate Upper roll unit heater Cable ties from the front of the machine using two M4 ×...
Page 44 2BA/B 18. Hang the upper size detection assembly on Spot sections the two spot sections of the roll guide and secure it using two M4 × 06 bronze binding screws. 19. Connect the connector of the upper size detection assembly. Connector Upper size detection assembly...
Page 45: Maintenance Mode
2BA/B 22. Insert the roll flanges into the right and left Paper portions of the paper and turn the levers of the roll flanges in the direction indicated by the arrow to secure them. 23. Set the paper in the upper roll unit and insert the upper roll unit securely into the main body of the machine.
Page 46: Maintenance Mode
2BA/B 1-4-1 Maintenance mode The copier is equipped with a maintenance mode which can be used to maintain and service the machine. (1) Executing a maintenance item Start 1.Press the cursor right key (Press and hold). 2.Press the Stop key (Press and hold). 3.Press the On Line key (Press and hold).
Page 47: Maintenance Mode Item List
2BA/B (2) Maintenance mode item list Item Section Content of maintenance item Initial setting* General U000 Printing out an own-status report — — — U001 Exiting the maintenance mode — — — U003 Setting the service telephone number — — — U004 Setting the machine model number —...
Page 48 2BA/B Item Section Content of maintenance item Initial setting* High voltage U100 Setting the drum surface potential Setting Grid: 158 Setting Target: 200 Setting LPH: 7 U101 Turning the transfer/separation charger on — — — U105 Forcing the cleaning lamps to be turned on —...
Page 49 2BA/B Item Section Content of maintenance item Initial setting* Other U901 Checking/Clearing total print counts by paper feed location U903 Checking/Clearing the paper jam counts U904 Checking/Clearing the call for service counts U908 Checking/Clearing the total count U916 Clearing all counts —...
Page 50: Contents Of Maintenance Mode Items
2BA/B (3) Contents of maintenance mode items Item No. Description and Procedure U000 Printing out an own-status report Description Prints out a list of the current settings of all maintenance items, and occurrences of paper jams and service calls. Purpose To check the current setting of the maintenance items, or the occurrences of paper jams and service calls.
Page 51 2BA/B Item No. Description and Procedure U001 Exiting the maintenance mode Description Exits the maintenance mode and returns to the normal copy mode. Purpose To exit the maintenance mode. Method Press the Start key. • The machine will enter the normal copy mode. U003 Setting the service telephone number Description...
Page 52 2BA/B Item No. Description and Procedure U019 Displaying the ROM version Description Displays the part number for the ROM fitted to each PCB. Purpose To check the part number or to decide, based on the last digit of the number, if the newest of ROM is installed. Method 1.
Page 53 2BA/B Item No. Description and Procedure U030 Checking the operation of the motors Description Drives each motor. Purpose To check the operation of each motor. Method 1. Press the Start key. 2. Use the cursor up/down keys to select the motor that you want to check. Display Operation Drive Mot...
Page 54 2BA/B Item No. Description and Procedure U032 Checking the operation of the clutches Description Turns each clutch on. Purpose To check the operation of each clutch. Method 1. Press the Start key. 2. Remove all the paper from the paper source. 3.
Page 55 2BA/B Item No. Description and Procedure U034 Adjusting the print start timing Method See page 1-6-40. U037 Checking the operation of the fan motors Description Drives each fan motor. Purpose To check the operation of each fan motor. Method 1. Press the Start key. 2.
Page 56 2BA/B Item No. Description and Procedure U039 Adjusting printing magnification Method See page 1-6-39. U041 Adjusting the standard cut length Method See page 1-6-41. U045 Checking paper size switches Description Displays the on/off status of each paper detection switch in the upper roller unit (optional) or middle/lower roller units.
Page 57 2BA/B Item No. Description and Procedure U101 Turning the transfer/separation charger on Description Performs transfer and separation charging. Purpose To check, when a transfer or separation problem occurs, whether charging is being performed correctly or not. Method 1. Press the Start key. 2.
Page 58 2BA/B Item No. Description and Procedure U129 Turning potential correction on/off Description Selects whether or not potential correction is to be performed. Purpose To turn potential correction off when the drum surface potential sensor (DPS) has been removed for replacement, and to enable the copy operation while ignoring a C5500 (drum surface potential sensor error) detection.
Page 59 2BA/B Item No. Description and Procedure U131 Changing the initial setting for the developer Description Displays and changes the toner sensor control voltage that was automatically set in maintenance item U130. Purpose To check the automatically set toner sensor control voltage, as well as to change the toner density if the images are too dark or to light.
Page 60 2BA/B Item No. Description and Procedure U139 Displaying the thermistor temperatures Description Displays the detected temperatures of the thermistors. Purpose To check the temperature of the drum as well as that outside the machine. Method Press the Start key. • The detected temperature (°C) of the thermistors shown below will be displayed. Display Corresponding thermistor DRUM (°C)
Page 61 2BA/B Item No. Description and Procedure U156 Changing the toner density control data Description Displays and changes the data used in controlling the toner density. Purpose Performed during replacement of the engine main PCB. Method Press the Start key. • The current toner density control data will be displayed. Display Setting item Setting range...
Page 62 2BA/B Item No. Description and Procedure U160 Coating the cleaning blade with toner Description Applies toner to the cleaning blade by coating the drum with toner. This maintenance item can be run after machine stabilization. If you want to run this maintenance item BEFORE machine stabilization, be sure to run maintenance item U162 first.
Page 63 2BA/B Item No. Description and Procedure U196 Checking the operation of the fixing heater Description Turns the main or sub fixing heaters on. Purpose To check the fixing heaters. Method 1. Press the Start key. 2. Use the cursor up/down keys to select the heater that you want to turn on. Display Description Heater1...
Page 64 2BA/B Item No. Description and Procedure U200 Turning all LEDs on Description Turns all of the LEDs on the operation panel on. Purpose To check the operation of all of the LEDs on the operation panel. Method Press the Start key. •...
Page 65 2BA/B Item No. Description and Procedure U214 Checking the upper roll unit Description Checks the operation of the optional upper roll unit. Purpose Used to check the operation of the upper roll winding clutch when there are problems with paper feed from the upper roll unit.
Page 66 2BA/B Item No. Description and Procedure U251 Checking/Clearing the maintenance count Description Displays and clears or changes the maintenance count. Purpose To check, as well as to clear, the maintenance count during the periodic maintenance service. Method Press the Start key. •...
Page 67 2BA/B Item No. Description and Procedure U256 Turning the auto preheat function on/off Description Turns the auto preheat function on or off. Purpose Set according to the preference of the user. Method Press the Start key. • The current setting will be displayed. Setting 1.
Page 68 2BA/B Item No. Description and Procedure U262 Ignoring a call for service detection Description Enables you to control the machine by ignoring any call for service detection. Purpose To ignore any call for service detection in those cases when a call for service might be detected and operation stopped, such as during adjustment of the machine.
Page 69 2BA/B Item No. Description and Procedure U267 Adjusting the cutting length for the paper leading edge Description Selects whether or not the cutting length for the leading edge of paper will be changed according to the temperature outside the machine when vellum is being used and the roll cut key is pressed. It is also possible to adjust the temperature at which the cutting length is changed.
Page 70 2BA/B Item No. Description and Procedure U271 Setting the unit of counting Description Sets the unit of counting for the total counter and the optional key counter. Purpose To change the unit of counting to fit the paper usage. Method Press the Start key.
Page 71 2BA/B Item No. Description and Procedure U273 Setting the maximum paper length Description Sets the length at which print paper will be cut when making long print. Purpose Set according to the preference of the user. Method Press the Start key. •...
Page 72 2BA/B Item No. Description and Procedure U450 Selecting the PG mode Description Selects and prints out the PG pattern that is to be generated at the printer. Purpose Used when performing adjustments related to printing images in order to check the status of other parts of the machine, using a PG pattern.
Page 73 2BA/B Item No. Description and Procedure U452 PG 16-level grayscale printout Description Initiates current correction to the LPH and prints out a PG 16-level grayscale. Purpose Used when check for problems with the LPH, whether or not the main charger wire, main charger housing or main grid are dirty, or to check the dark potential after replacing the drum.
Page 74 2BA/B Item No. Description and Procedure U461 Adjusting the focus and measuring the solid-black density Description Prints out a test pattern for adjusting the focus, as well as for measuring the density of a solid black image. Purpose Used to adjust the focus. Method 1.
Page 75 2BA/B Item No. Description and Procedure U901 Checking/Clearing total print counts by paper feed location Description Checks the total print count of each paper feed location or resets all of the counts back to zero. Purpose Used to check the timing of the standard replacement of maintenance parts, or to clear all print counts after replacement of those parts.
Page 76 2BA/B Item No. Description and Procedure U903 Checking/Clearing the paper jam counts Description Checks the total number of paper jams that have occurred by location and type, or resets all of the counts back to zero. Purpose Used to check the occurrence of paper jams, or to clear all counts after replacement of maintenance parts. Method 1.
Page 77 2BA/B Item No. Description and Procedure U904 Checking/Clearing the call for service counts Description Checks the total number of call for service detections, or resets the count back to zero. Purpose Used to check the occurrence of call for service detections, or to clear the count after replacement of maintenance parts.
Page 78 2BA/B Item No. Description and Procedure U908 Checking/Clearing the total count Description Displays and clears the total count value. Purpose Used to check the timing of the standard replacement of maintenance parts. Method Press the Start key. • The current total count will be displayed. Clearing the count 1.
Page 79: Paper Misfeed Detection
2BA/B 1-5-1 Paper misfeed detection (1) Paper misfeed indication When a paper jam occurs, the copier immediately stops copying and the operation panel shows a paper misfeed message. Paper jam counts sorted by the detecting conditions can be checked by maintenance item U903. To remove paper, open the front covers and take out roll units, or open the detachable unit.
Page 80: Paper Misfeed Detection Conditions
2BA/B (2) Paper misfeed detection conditions BRSW BTSW BRCL RWCL-U PFSW-U PSSW FCL-U 1, 2, 3, 4, 5 RWCL-M PFSW-M FCL-M RWCL-L PFSW-L FCL-L Figure 1-5-1 Paper misfeed detection 1-5-2...
Page 81 2BA/B 1. No paper feed from the bypass table When the bypass timing switch (BTSW) does not turn on within 1600 ms of the bypass registration switch (BRSW) turning BRSW 1600 ms BTSW Timing chart 1-5-1 When the bypass registration switch (BRSW) is on at turning on of the main switch or opening/closing of the detachable unit.
Page 82 2BA/B When the middle paper feed switch (PFSW-M) does not turn off within 13 s of the middle roll winding clutch (RWCL-M) turning on. PFSW-M 13 s RWCL-M Timing chart 1-5-6 4. No paper feed from the lower paper roll unit When printing starts, the paper size switches (PSSW 1 to 5) do not turn on within 6600 ms of the lower feed clutch (FCL-U) turning on (primary paper feed).
Page 83 2BA/B 7. Paper jam in the paper conveying section When the eject switch (ESW) does not turn on within 6100 ms of the roll registration clutch (RRCL) turning on (secondary paper feed). RRCL 6100 ms Timing chart 1-5-10 When the registration switch (RSW) does not turn off within 2300 of the cutter motor (CM) turning off. 2300 ms Timing chart 1-5-11 When the cutter stops during cutting operation and cutting has not been successfully completed.
Page 84: Paper Misfeeds
2BA/B (3) Paper misfeeds Problem Causes/check procedures Corrective measures No paper feed from A piece of paper torn from print Check and remove it, if any. the bypass table paper is caught around the bypass feed roller or upper or lower bypass roller.
Page 85 2BA/B Problem Causes/check procedures Corrective measures No paper feed from Guide plates or other components Check and remedy or replace any deformed parts. the middle roll unit along the paper conveying path between the middle roll unit and the roll registration roller. The roll paper feed upper roller of Check the roll paper feed upper roller and, if it is dirty, the middle roll unit is dirty with...
Page 86 2BA/B Problem Causes/check procedures Corrective measures No paper feed from Electrical problem with the lower See page 1-5-27. the lower roll unit feed clutch. Electrical problem with the roll See page 1-5-27. registration clutch. Bypass table A piece of paper torn from print Check and remove it, if any.
Page 87 2BA/B Problem Causes/check procedures Corrective measures Paper jam in the Roll paper is left uncut. Press the Roll Cut key to cut remaining paper and remove eject section A piece of paper is caught around Check and remove it, if any. the eject switch.
Page 88: Self-Diagnostic Function
2BA/B 1-5-2 Self-diagnostic function (1) Self-diagnostic display This unit is equipped with a self-diagnostic function. When it detects a problem with itself, it disables printing and displays a 4-digit self-diagnostic code (0110 to 7200) preceded by “C” indicating the nature of the problem together with a message requesting to call for service on the display.
Page 89: Self Diagnostic Codes
2BA/B (2) Self diagnostic codes Remarks Code Contents Causes Check procedures/corrective measures C0110 Backup RAM error Problem with a back-up Open and close the detachable unit and run • Backup area has been altered. memory data. maintenance item U020 to format the backup memory data.
Page 90 2BA/B Remarks Code Contents Causes Check procedures/corrective measures C2201 Drum motor lock error The drum motor con- Reinsert the connector. Also check for • Drum motor lock detection signal to nector terminals are continuity across the terminal wire and if CN7-11 on the engine main PCB loosely connected or none, remedy or replace the wire.
Page 91 2BA/B Remarks Code Contents Causes Check procedures/corrective measures C5500 Drum surface potential sensor The main high-voltage Reinsert the connector. Also check for error transformer connector continuity across the terminal wire and if • Potential sensor input to CN2-5 on terminals are loosely none, remedy or replace the wire.
Page 92 2BA/B Remarks Code Contents Causes Check procedures/corrective measures C6000 Broken main fixing heater The fixing heater con- Run maintenance item U196 by selecting connection trol circuit on the power “Heater1”. If voltage between TB3 and CN2- • Machine operation still did not source PCB is broken.
Page 93 2BA/B Remarks Code Contents Causes Check procedures/corrective measures C6400 Zero-cross interruption error Connector terminals are Check the connection of CN4-7 on the • The zero-cross signal was not input loosely connected or engine main PCB and CN9-1 on the power into CN3-1B on the engine main are making poor source PCB and continuity across the...
Page 94: Image Formation Problems
2BA/B 1-5-3 Image formation problems (1) No image (2) Part or all of the (3) Image is too light. (4) Background is (5) A white line (entirely white). image is solid visible. appears black. longitudinally. See page 1-5-17. See page 1-5-17. See page 1-5-18.
Page 95 2BA/B (1) No image (entirely white). Causes 1. No transfer charging. 2. LPH fails to turn on. Causes Check procedures/corrective measures 1. No transfer charging. Defective engine main PCB. Run maintenance item U101 by selecting “TC: ON” and check if CN4-3 on the engine main PCB goes low.
Page 96 2BA/B (3) Image is too light. Causes 1. Insufficient toner. 2. Deteriorated developer. 3. Deteriorated drum. 4. Misadjusted developing section. 5. Misadjusted drum surface potential. 6. Dirty LPH. 7. Defective ST high-voltage transformer. Causes Check procedures/corrective measures 1. Insufficient toner. If the message requesting to add toner is displayed on the operation panel, replenish toner.
Page 97 2BA/B (5) A white line appears Causes longitudinally. 1. Dirty or flawed main charger wire. 2. Foreign matter in the developing assembly. 3. Flawed drum. 4. Dirty LPH. 5. Defective LPH. Causes Check procedures/corrective measures 1. Dirty or flawed main charger wire. Clean the main charger wire.
Page 98: A Black Line Appears Laterally
2BA/B (7) A black line appears laterally. Causes 1. Flawed drum. 2. Developing bias voltage is not output. 3. Dirty developing section. Causes Check procedures/corrective measures 1. Flawed drum. If the distance between lines is 283 mm, replace the drum (see page 1-6-11).
Page 99: Black Dots Appear On The Image
2BA/B (9) Black dots appear on the Causes image. 1. Flawed drum. 2. Deformed or worn cleaning blade. 3. Dirty or flawed cleaning fur brush. Causes Check procedures/corrective measures 1. Flawed drum. If the distance between dots is 283 mm, replace the drum (see page 1-6-11).
Page 100: Offset Occurs
2BA/B (12) Offset occurs. Causes 1. Defective cleaning blade. 2. Right, middle or left cleaning lamp fails to light. Causes Check procedures/corrective measures 1. Defective cleaning blade. Replace the cleaning blade (see page 1-6-22). 2. Right, middle or left cleaning lamp fails to Run maintenance item U105.
Page 101: Image Is Out Of Focus
2BA/B (15) Image is out of focus. Causes 1. LPH installed incorrectly. 2. Defective LPH. Causes Check procedures/corrective measures 1. LPH installed incorrectly. Run maintenance item U461 by selecting “Adjust Focus” and output the test pattern for image focus adjustment. If the image is not correct, adjust the LPH position (see page 1-6-5).
Page 102: One Forth The A0 Width Of The Image Is White
2BA/B (17) One forth the A0 width of the Causes image is white. 1. Defective LPH. Causes Check procedures/corrective measures 1. Defective LPH. Run maintenance item U451. If no gray pattern is output, replace the LPH (see page 1-6-3). (18) One forth the A0 width of the Causes image is black.
Page 103: Electrical Problems
2BA/B 1-5-4 Electrical problems Problem Causes Check procedures/corrective measures There is no power at the wall Measure the input voltage. The machine does outlet. not operate at all The power plug is not connected Check that the power cord is firmly connected to the when the main correctly.
Page 104: The Toner Feed Motor Does Not Operate
2BA/B Problem Causes/check procedures Corrective measures The toner feed motor coil is Check for continuity across the coil. If none, replace the The toner feed motor broken. toner feed motor. does not operate. The engine main PCB is defective. Run maintenance item U135. If 24 V DC is not output across CN4-1 and CN4-2 on the engine main PCB, replace the PCB.
Page 105: The Lower Roll Winding Clutch Does Not Operate
2BA/B Problem Causes/check procedures Corrective measures (12) The lower roll winding clutch coil is Check for continuity across the coil. If none, replace the The lower roll wind- broken. lower roll winding clutch. ing clutch does not The connector terminals of the Check for continuity across the terminals.
Page 106: The Bypass Registration Clutch Does Not Operate
2BA/B Problem Causes/check procedures Corrective measures (18) The bypass registration clutch coil Check for continuity across the coil. If none, replace the The bypass is broken. bypass registration clutch. registration clutch The connector terminals of the Check for continuity across the terminals. If none, replace does not operate.
Page 107: The Main Fixing Heater Fails To Turn Off
2BA/B Problem Causes/check procedures Corrective measures (23) The thermal sensing section of Visually check and clean if necessary. The main fixing fixing unit thermistor 1 is dirty. heater fails to turn Measure the resistance. If it is ∞Ω, replace fixing unit Fixing unit thermistor 1 is shorted.
Page 108: No Developing Bias Voltage
2BA/B Problem Causes/check procedures Corrective measures (28) The main high-voltage transformer Check if the connectors are securely connected. If not, No developing bias connectors are loosely connected remedy. Check for continuity across the terminals. If none, voltage. or are making poor contacts. replace them.
Page 109: Mechanical Problems
2BA/B 1-5-5 Mechanical problems Problem Causes/check procedures Corrective measures Check if the surface of the roll paper feed If they are, clean with isopropyl alcohol. No primary paper feed. upper and lower rollers of the upper roll unit* is dirty with paper powder. Check if the roll paper feed upper and lower If it is, replace.
Page 110: No Secondary Paper Feed
2BA/B Problem Causes/check procedures Corrective measures Check if the surfaces of the roll registration If they are, clean with isopropyl alcohol. No secondary paper roller and roll registration pulley is dirty with feed. paper powder. Check if the surfaces of the bypass upper If they are, clean with isopropyl alcohol.
Page 111: Cautions During Disassembly And Assembly
2BA/B 1-6-1 Cautions during disassembly and assembly (1) Caution • When carrying out disassembly, be sure to turn the main switch off and pull out the power cord before starting. • When handling PCBs avoid touching PCB connectors with the bare hands or scratching equipment. •...
Page 112: Executing A Maintenance Item
2BA/B (2) Executing a maintenance item Start 1.Press the cursor right key (Press and hold). 2.Press the Stop key (Press and hold). 3.Press the On Line key (Press and hold). - - - - - Entering the maintenance mode 4.Release all the three keys above. 5.Press the Stop key within three seconds.
Page 113: Optical Section
2BA/B 1-6-2 Optical section (1) Attachment and removal of the LED printhead Follow the procedure below when cleaning or replacing the LED printhead. Procedure 1. Detach the developing unit (see page 1-6-7), LPH partition the cleaning unit (see page 1-6-21), and the drum (see page 1-6-11).
Page 114 2BA/B 6. Remove the two screws and slide the LPH LPH circuit mount circuit mount to the left in order to detach it. Electric wires (black) Electric wires (black) Electric wires (black) 7. Remove the six connectors on the front side of the LED printhead.
Page 115 2BA/B When replacing the LPH PCB, follow steps 10 to 12. Replacing the LPH main PCB Connectors 10. Remove the six connectors from the LPH main PCB. 11. Remove the eight screws and then detach the LPH PCB from the LPH main circuit mount. LPHROM 12.
Page 116: Adjustment Of The Image Focus (Lph Height Adjustment)
2BA/B (2) Adjustment of the image focus (LPH height adjustment) Perform after replacing the LED printhead. Procedure 1. Perform adjustment of the image focus adjustment (maintenance item U461) and print out a test pattern. 2. Using a magnifying glass, check whether the lines of the smaller pattern are printed clearly or not.
Page 117: Developing Section
2BA/B 1-6-3 Developing section (1) Replacement of developer Follow the procedure below when replacing developer. Procedure 1. Open the toner replenishing slot. Screw 2. Remove the screw in order to detach the Connector protection plate connector protection plate, and then remove Toner Screws the 5-pin connector.
Page 118 2BA/B 5. Remove the two pins and the connector on the Pins toner hopper unit and then detach the toner hopper unit from the developing unit. Toner hopper unit 2-pin connector Figure 1-6-11 6. Remove the screw from each of the left and Left developing lid right developing lids and slide the lids inwards in order to detach them.
Page 119: Adjustment Of The Doctor Blade: Reference
2BA/B (2) Adjustment of the doctor blade: reference Follow the procedure below when carrier appears or a dark background shows up on copies. Procedure 1. Detach the developing unit and the toner Upper developing seal hopper unit, and remove the developer from Developing unit the developing unit (see page 1-6-7).
Page 120: Adjustment Of Position For Magnetic Brush: Reference
2BA/B (3) Adjustment of position for magnetic brush: reference Follow the procedure below when carrier appears or a dark background shows up on copies. Procedure 1. Detach the developing unit and toner hopper unit (see page 1-6-7). 2. Loosen the screws holding the developing Developing bias terminal bias terminal and carry out adjustment based on the marks inscribed on the developing bias...
Page 121: Image Formation Section
2BA/B 1-6-4 Image formation section (1) Replacing the drum Follow the procedure below when performing drum maintenance. Caution After replacing the drum, be sure to clean the main charger unit and check the drum surface potential (see page 1-6-14). Procedure 1.
Page 122 2BA/B 5. Roll the drum toward you in order to detach it Drum from the main unit. 6. Replace the drum and refit all the removed parts. * When installing the drum, fit the drum flange with the lot number label positioned to the right side and be sure to reengage the drive joint of the drum flange.
Page 123: Cleaning The Drum: Reference
2BA/B (2) Cleaning the drum: reference Follow the procedure below when incorrect images are produced. Caution • Do not clean the drum in a location that is exposed to direct sunlight. • Clean the drum in a location where dust is not apt to collect, as rough pieces of dust contained in the air or foreign matter on the polishing cloth are likely to damage the drum.
Page 124: Checking The Drum Surface Potential
2BA/B (3) Checking the drum surface potential Follow the procedure below when replacing the drum, drum surface potential sensor and LED printhead. Procedure Start Approx. 1 cm Enter the maintenance mode. Select “452” using the cursor up/down keys. Sample 1 Sample 2 Sample 3 Sample 1: images can be seen from around 3rd level.
Page 125: Replacing The Main Charger Wire
2BA/B (4) Replacing the main charger wire Follow the procedure below when the charger wire is broken or when performing maintenance. Caution • Use the specified gilding tungsten oxide wire for the charger wire. (Item No. 2A768020) • The section wound around the charger spring should not protrude from the main charger housing. •...
Page 126 2BA/B 6. Wind the new tungsten wire five times around 1. Fold over 2. Pass the folded one end of the charger spring and trim the end the end of end through the of the wire. the tungsten wire. end of the charger * The length of the cut wire must be less than spring.
Page 127: Replacing The Transfer/Separation Charger Wire
2BA/B (5) Replacing the transfer/separation charger wire Follow the procedure below when the charger wire is broken. Caution • Use the specified tungsten oxide wire for the charger wire. (Item No. 74716280) • The section wound around the charger spring should not protrude from the transfer charger housing. •...
Page 128 2BA/B 4. Remove the left and right charger lids from the Left lid transfer charger unit. 5. Loosen the screws holding the charger wire, remove the charger spring from the transfer Right lid charger terminal, and remove the charger Charger spring wire.
Page 129: Replacing The Transfer Wire
2BA/B (6) Replacing the transfer wire Follow this procedure when the transfer wire is broken. Caution Use the specified wire for the transfer wire (Item No. 2A716220). Procedure 1. Detach the transfer charger unit (see page 1- Transfer wire 6-17). 2.
Page 130 2BA/B 5. Tighten the transfer wire in order to remove Less than 5 mm any slack, wind the end of the transfer wire once around the screw on the left side of the bottom of the transfer outer shield, and then tighten that screw.
Page 131: Cleaning Section
2BA/B 1-6-5 Cleaning section (1) Attachment and removal of the cleaning unit Follow the procedure below when performing maintenance on the cleaning unit, the main charger unit and the drum, and when replacing the LED printhead. Procedure • Removal Cleaning unit 1.
Page 132: Attachment And Removal Of The Cleaning Blade
2BA/B (2) Attachment and removal of the cleaning blade Follow the procedure below when performing maintenance on the cleaning blade. Caution After replacing the cleaning blade, always perform maintenance item U160 in order to coat the cleaning blade with toner (see page 1-4-17).
Page 133: Attachment And Removal Of The Lower Cleaning Seal
2BA/B (3) Attachment and removal of the lower cleaning seal Follow the procedure below when performing maintenance on the lower cleaning seal. Procedure Lower cleaning seal 1. Remove the cleaning unit (see page 1-6-21). 2. Remove the main charger unit and the main grid (see pages 1-6-15 and 1-6-22).
Page 134: Attachment And Removal Of The Cleaning Fur Brush
2BA/B (4) Attachment and removal of the cleaning fur brush Follow the procedure below when performing maintenance on the cleaning fur brush. Procedure 1. Remove the cleaning unit (see page 1-6-21). Cleaning fur brush 2. Remove the main charger unit (see page 1-6- Spring pin 15).
Page 135: Attachment And Removal Of The Separation Claw
2BA/B (5) Attachment and removal of the separation claw Follow the procedure below when performing maintenance on the separation claw. Procedure 1. Remove the cleaning unit (see page 1-6-21). 2. Remove the holder from the main unit by aligning it along the D-cut section. Drum separation claw 3.
Page 136: Fixing Section
2BA/B 1-6-6 Fixing section (1) Attachment and removal of the oil roller Follow the procedure below when performing maintenance on the oil roller. Procedure 1. Open the detachable unit and pull out the eject cover. Screw 2. Remove the two screws to the eject cover and open the cover downward.
Page 137: Attachment And Removal Of The Main And Sub Fixing Heaters
2BA/B (2) Attachment and removal of the main and sub fixing heaters Follow the procedure below when inspecting or replacing the main and sub fixing heaters. Procedure Upper detachable 1. Open the detachable unit and completely open unit cover the eject cover downward (see page 1-6-26). Screw 8-pin connector 2.
Page 138 2BA/B 5. Disconnect the 1-pin connectors from both Fixing heater mount (left) Fixing heater mount (right) ends of the main and sub fixing heaters. 6. Remove the two screws holding each of the Screws left and right mounts to the fixing heater and Screws then detach the fixing heater mounts.
Page 139: Attachment And Removal Of The Heat Roller And Heat Roller Bearings
2BA/B (3) Attachment and removal of the heat roller and heat roller bearings Follow the procedure below when performing maintenance on the heat roller and heat roller bearings. Procedure 1. Remove the oil roller (see page 1-6-26). 2. Remove the main and sub fixing heaters (see Apply conductive grease (GE334) around the E-groove page 1-6-27).
Page 140: Attachment And Removal Of The Press Roller And Press Roller Bearings
2BA/B (4) Attachment and removal of the press roller and press roller bearings Follow the procedure below when performing maintenance on the press roller and press roller bearings. Procedure 1. Open the fixing unit (see page 1-6-27). 2. Remove the 4-pin connector and the two screws, and then detach the fixing unit Front fixing guide partition.
Page 141 2BA/B 9. Replace the press roller bearings. * Apply specified grease to the U-shaped cutouts on the side plate which hold the press roller shaft. * Before returning the press roller to the machine, clean the press roller guides and the press roller bushings located on both sides of the machine by wiping with a dry cloth.
Page 142: Attachment And Removal Of Fixing Unit Thermistors 1 And 2 (For Use With The Heat Roller)
2BA/B (5) Attachment and removal of fixing unit thermistors 1 and 2 (for use with the heat roller) Follow the procedure below when inspecting or replacing fixing unit thermistors 1 and 2. Procedure Upper detachable 1. Open the detachable unit and completely open unit cover the eject cover downward (see page 1-6-26).
Page 143 2BA/B 4. Remover the 2-pin connector from each of the Fixing unit thermistor 1 fixing unit thermistors 1 and 2 and the screws holding each fixing unit thermistor retainer, and then detach the retainers. 2-pin connector 5. Remove the screws from each of fixing unit thermistors 1 and 2 in order to detach them from their respective retainers.
Page 144: Attachment And Removal Of The Fixing Unit Thermostat
2BA/B (6) Attachment and removal of the fixing unit thermostat Follow the procedure below when inspecting or replacing the fixing unit thermostat. Procedure 1. Open the detachable unit and completely open Fixing unit thermostat the eject cover downward (see page 1-6-26). 2.
Page 145: Attachment And Removal Of Fixing Unit Thermistors 3 And 4 (For Use With The Press Roller)
2BA/B (7) Attachment and removal of fixing unit thermistors 3 and 4 (for use with the press roller) Follow the procedure below when inspecting or replacing fixing unit thermistors 3 and 4. Procedure 1. Open the detachable unit and completely open 2-pin connector 2-pin connector the eject cover downward (see page 1-6-26).
Page 146: Attachment And Removal Of The Heat Roller Separation Claw
2BA/B (8) Attachment and removal of the heat roller separation claw This operation must be carried out at the periodic maintenance of 60K. (3 ppm printer only) Procedure 1. Remove the ejection guide (see page 1-6-26). 2. Remove the heat roller separation claw from Ejection guide the ejection guide.
Page 147: Attachment And Removal Of The Fixing Idle Gear
2BA/B (10) Attachment and removal of the fixing idle gear This operation must be carried out at the periodic maintenance of 60K. (3 ppm printer only) Procedure 1. Open the eject cover downward and detach the left upper and lower detachable unit covers.
Page 148: Paper Feed Section
2BA/B 1-6-7 Paper feed section (1) Attachment and removal of the cutter unit Follow the procedure below when replacing the cutter unit. Procedure 1. Remove the lower rear cover. 2. Remove the four screws and then detach the Data partition data partition by pulling it in the direction of the arrow.
Page 149: Adjusting Printing Magnification
2BA/B (2) Adjusting printing magnification Follow the procedure below when the printing magnification is not correct. Caution: Use paper with the width of 841 mm or more. Procedure Start Enter the maintenance mode. Main scanning direction Reference: 762±1 mm (12 grids) Select “039”...
Page 150: Adjusting The Print Start Timing
2BA/B (3) Adjusting the print start timing Follow the procedure below when there is a regular error between the leading edges of the print image. Caution: Before making the following adjustment, ensure that the below adjustment has been made in the maintenance mode. U039 U034 (P.1-6-39)
Page 151: Adjusting The Standard Cut Length
2BA/B (4) Adjusting the standard cut length Follow the procedure below if the paper is not cut correctly in standard cut printing. Also, perform this adjustment when the paper is set to cut at different lengths according to the paper type (standard paper, vellum or film).
Page 152: Replacement Of Paper Transport System
2BA/B (5) Replacement of paper transport system This operation must be carried out at the periodic maintenance of 60K. (3 ppm printer only) Procedure 1. Remove the left lower cover. 2. Remove the middle feed clutch, lower feed clutch, roll feed clutch, and roll registration clutch by removing one stop ring and one connector for each.
Page 153: Cleaning Of Paper Transport System Roller
2BA/B (6) Cleaning of paper transport system roller This operation must be carried out at the periodic maintenance of 60K. (3 ppm printer only) (6-1) Cleaning of roll paper feed rollers Procedure Roll paper feed guide Roll paper feed rollers 1.
Page 154: Cleaning Of Roll Registration Roller
2BA/B (6-3) Cleaning of roll registration roller Procedure 1. Remove the lower rear cover. 2. Remove the rear roll registration unit by removing the two screws and the connector. Connector Rear roll ragistration unit Figure 1-6-78 3. Clean the roll registration roller with alcohol. 4.
Page 155: Cleaning Of Cutter Insertion Rear Roller
2BA/B (6-4) Cleaning of cutter insertion rear roller Procedure 1. Remove the lower rear cover. 2. Clean the cutter insertion rear roller with alcohol. 3. Refit all the removed parts. Cutter insertion rear roller Figure 1-6-80 1-6-45...
Page 156: Others
2BA/B 1-6-8 Others (1) Attachment and removal of the ozone filter Follow the procedure below when replacing the ozone filter. Procedure 1. Open the detachable unit. 2. Remove the screw holding the ozone filter retainer and then detach the retainer. 3.
Page 157: Greasing Of Idle Gear
2BA/B (3) Greasing of idle gear This operation must be carried out at the periodic maintenance of 60K. (3 ppm printer only) Procedure Duct unit 1. Open the eject cover downward and detach the left upper and lower detachable unit covers.
Page 158 2BA/B 6. Remove all the connectors from the fixing motor unit and release the wire. 7. Remove the four screws and then remove the fixing motor unit. Fixing motor unit Figure 1-6-86 8. Remove the two idle gears from the fixing Idle gears motor unit by removing one stop ring for each.
Page 159: Replacing The Engine Main Pcb
2BA/B 1-7-1 Replacing the engine main PCB Procedure 1. Enter the maintenance mode. 2. Run maintenance item U000 to output a list of current settings for the maintenance mode. 3. Exit the maintenance mode. 4. Turn the main switch off and disconnect the power cord. 5.
Page 160: Upgrading The Version Of The Flash Rom Firmware (Engine Main Pcb)
2BA/B 1-7-2 Upgrading the version of the flash ROM firmware (engine main PCB) Firmware upgrading requires the following tools: CompactFlash (Products manufactured by SANDISK are recommended.) Precautions • When writing data to a new CompactFlash from a computer, be sure to format it in advance. (For formatting, insert a CompactFlash and select a drive.) For a desktop computer, connect a CompactFlash card reader/writer to it.
Page 161: Fixed Variable Resistor (Vr)
2BA/B 1-7-3 Fixed variable resistor (VR) Some of the variable resistors adjusted at the factory cannot be adjusted once they leave the factory. The following variable resistors cannot be adjusted after being shipped from the factory. Do not attempt to adjust these resistors.
Page 162: Mechanical Construction Of Each Section
2BA/B 2-1-1 Mechanical construction of each section (1) Paper feed and conveying section The paper feed and conveying section is comprised of the parts shown in Figure 2-1-1. Paper can be fed either manually or automatically from a paper roll. In the paper feed and conveying section, paper fed from the roll unit or placed on the bypass table is conveyed to the transfer section in synch with the LED on timing of the LPH section.
Page 163 2BA/B EMPCB CN3-12 CN6-2 CN3-11 BTSW BRSW CN6-1 CN3-7 BRCL BFCL RRCL CN6-4 CHPSW-R, PESW-U* CN3-8, CN3-9 CHPSW-L CN7-13 RWCL-U* CN6-5 RFCL CN6-9 PFSW-U* CN16-1 FCL-U* CN6-6 PESW-M CN7-14 RWCL-M CN6-10 PFSW-M CN16-2 FCL-M CN6-7 PESW-L CN7-15 RWCL-L CN6-11 PFSW-L CN16-3 FCL-L CN6-8...
Page 164 2BA/B • With the paper feed switch off 100 ms PFSW-M FCL-M Timing chart 2-1-1 Winding operation for the middle roll unit (1) a: The paper feed motor (PFM) and the middle feed clutch (FCL-M) turn on, and the paper is conveyed in the feed direction. b: 100 ms after the middle paper feed switch (PFSW-M) is turned on, the middle feed clutch (FCL-M) and the paper feed motor (PFM) turn off and the leading edge of the paper stops at the home position (print ready position).
Page 165: Bypass Paper Feed
2BA/B (1-1) Bypass paper feed BTSW: Off Paper insertion BRSW: On BTSW: On BRSW: Off 1.5 s 750 ms BRSW 1.0 s BTSW 950 ms BFCL 500 ms BRCL 375 ms 500 ms VSYNC signal Potential correction completed Primary paper feed completed Image output ready Timing chart 2-1-3 Bypass paper feed a: 1.5 s after the bypass registration switch (BRSW) is turned on by inserting paper into the bypass table, the paper feed...
Page 166: Roll Unit Paper Feed
2BA/B (1-2) Roll unit paper feed Paper feed CHPSW-R: Off RSW: On request signal RSW: Off 600 ms 700 ms FCL-U 50 ms 375 ms RFCL 10 ms RRCL 55 ms 10 ms CHPSW-R CHPSW-L VSYNC signal Memory count Potential correction completed Primary paper feed completed Image output ready Timing chart 2-1-4 Roll unit paper feed...
Page 167: Main Charger Section
2BA/B (2) Main charger section The main charger section is comprised of the drum, the drum surface potential sensor (DPS), the main charger unit and the main grid as shown in Figure 2-1-3. The drum is electrically charged uniformly by means of the main grid to form a static latent image on the surface. The drum surface potential sensor measures the dark potential of the drum surface.
Page 168 2BA/B Figure 2-1-4 Main charger unit 1 Right main charger lid 5 Left main charger lid 2 Screw 6 Main charger terminal 3 Washer 7 Charger spring 4 Charger wire (gilding tungsten oxide wire) 8 Main charger shield MC REM CN6-12 CN1-3 GRID CONT...
Page 169 2BA/B Potential correction completed. Paper feed request signal ESW: On ESW: Off 1070 ms MC REM 250 ms GRID CONT 250 ms 1070 ms 1070 ms 250 ms DB CONT 250 ms Timing chart 2-1-5 Operation of the main high-voltage transformer a: When the paper feed request signal is input, the main motor (MM) and drum motor (DM) turn on.
Page 170: Lph Section
2BA/B (3) LPH section In the LPH section, the drum surface is irradiated by the LPH to form a static latent image on it. LPH (LED printhead) Figure 2-1-6 LPH section LPHPCB EMPCB Figure 2-1-7 Block diagram of the LPH section 2-1-9...
Page 171 2BA/B Static latent image formation The LPH (LED printhead) consists of 21760 LEDs which are turned on and off based on the image data to form a static latent image on the drum surface line by line. Toner adheres only to the areas irradiated by the lit LEDs, so the image is formed.
Page 172: Developing Section
2BA/B (4) Developing section The developing section is comprised of the developing unit assembly and the toner hopper assembly. The developing unit assembly is comprised of the developing roller and doctor blade which form a magnetic brush, and the developer paddle and developer spiral roller which mix the developer.
Page 173 2BA/B Forming the magnetic brush The developer flows by the rotation of the developing roller and the magnetic brush is formed on poles N1a, N1b and N1c. The height of the magnetic brush is set by the doctor blade. The developing bias voltage (650 V DC) which is output from the main high-voltage transformer (MHVT) is applied to the developing roller to improve the image contrast.
Page 174 2BA/B Toner density control Toner sensor output voltage Copy disable level (2.6 V) Toner empty level (2.3 V) 2.16 V Toner empty reset level (2.12 V) Toner feed motor ON level (2.0 V) Toner feed motor OFF level (1.98 V) Toner control level (1.9 V) Figure 2-1-12 Toner density control...
Page 175 2BA/B Correcting the toner sensor control voltage The toner sensor control voltage (TNS CONT) is set while maintenance item U130 (Initial setting for the developer) is performed. It is corrected based on the change of temperature of the developing section and developing count. Corrected toner sensor control voltage = toner sensor control voltage set by the maintenance item U130 + correction value based on the temperature + correction value based on the developing count •...
Page 176: Transfer/Separation Section
2BA/B (5) Transfer/separation section The transfer/separation section is comprised of the transfer charger unit, the pre-transfer roller, and the drum separation claws as shown in Figure 2-1-15. Figure 2-1-15 Transfer/separation section 1 Tungsten oxide wires 5 Transfer charger 2 Pre-transfer pulley 6 Separation charger 3 Pre-transfer outer guide 7 Transfer charger unit...
Page 177 2BA/B The transfer charger unit is divided into the transfer charger which transfers the toner image formed on the drum to the paper, and the separation charger which removes the paper from the drum. Transfer charging and separation charging are performed by applying high voltage which is output from the ST high-voltage transformer (STHVT) to both ends of each tungsten oxide transfer charger and separation charger wires.
Page 178 2BA/B Paper feed request signal DB CONT TC REM 180 ms 1.43 s 1.87 s SC REM VSYNC signal 1.43 s Memory count Timing chart 2-1-6 Operation of the transfer/separation section a: When the paper feed request signal is input, the main motor (MM) turns on and, at the same time, separation charging (SC REM) starts.
Page 179: Cleaning Section
2BA/B (6) Cleaning section Cleaning is performed by the blade cleaning method and the cleaning fur brush. The cleaning section is comprised of the cleaning blade and the cleaning fur brush which remove the residual toner adhering to the drum after transfer, and the cleaning unit spiral which collects and sends toner to the waste toner tank.
Page 180: Static Eliminator Section
2BA/B (7) Static eliminator section The static eliminator section is comprised of the right, middle and left cleaning lamps (CL-R/M/L) as shown in Figure 2-1-19 and eliminates the residual charge after transfer. Right cleaning lamp (CL-R) Middle cleaning lamp (CL-M) Left cleaning lamp (CL-L) Figure 2-1-19 Static eliminator section CL-R,...
Page 181: Fixing Section
2BA/B (8) Fixing section The fixing section is comprised of the parts shown in Figure 2-1-21. After the transfer operation, the paper is conveyed to the fixing section and passes between the heat roller and the press roller. A constant pressure is applied between the heat roller and the press roller by the fixing press spring and the toner transferred is fixed on the paper by the heat and pressure applied from each roller.
Page 182 2BA/B PRY1 PSPCB FH-M FH-S CN2-1 CN2-2 FM REM CN7-5 FM CLOCK CN7-6 CN2-15 FTH1 CN2-14 FTH2 CN2-13 FTH3 CN2-12 FTH4 CN2-3 ETTH CN3-13 FFM-R REM CN4-10 FFM-R FFM-R H/L CN4-13 FFM-L REM CN4-12 FFM-L EMPCB FFM-L H/L CN4-15 Figure 2-1-22 Block diagram of the fixing section 2-1-21...
Page 183 2BA/B Heating and temperature control of heat roller and press roller • Heat roller temperature control 1 Fixing unit thermistor 1 (FTH1) detects the surface temperature around the center of the heat roller and fixing unit thermistor 2 (FTH2) detects the surface temperature of the right end of the heat roller. If the temperature detected by fixing unit thermistors 1 and 2 (FTH1 and 2) becomes less than T (control temperature), the main and sub fixing heaters (FH-M/S) are turned on to heat the heat roller.
Page 184 2BA/B • Press roller temperature control If the surface temperature of the press roller is less than its minimum value or the surface temperature between the heat roller side and on the opposite side is different, fixing problems may occur. Therefore, the following control is performed to keep the surface temperature of the press roller constant.
Page 185: Electric Parts Layout
2BA/B 2-2-1 Electric parts layout (1) PCBs Machine left Machine inside Machine right Figure 2-2-1 PCBs 1. Engine main PCB (EMPCB) ......Controls other PCBs and electric components. 2. IPU PCB ............Controls image processing. 3. Power source PCB (PSPCB) ....... Turns 24 V DC, –12 V DC, ±5 V DC and 3.4 V DC supply on. 4.
Page 186: Switches And Sensors
2BA/B (2) Switches and sensors 39,40 37 44 41,42 28,29 12,19,20 12 19 20 21 21,22 Left Right As viewed from machine front 23,24,25,26,27 27 26 25 24 23 Right Left As viewed from machine rear Machine left Machine inside Machine right Figure 2-2-2 Switches and sensors 1.
Page 187 2BA/B 15. Bypass registration switch (BRSW) ..... Detection of leading edge of paper on the bypass table, control of the bypass feed clutch and bypass registration clutch, and detection of paper jams in the bypass feed section. 16. Bypass timing switch (BTSW) ...... Control of the bypass feed clutch and bypass registration clutch, and detection of paper jams in the bypass feed section.
Page 188: Motors
2BA/B (3) Motors 9,10 Machine left Machine inside Machine right Figure 2-2-3 Motors 1. Main motor (MM) ......... Drives the developing section, transfer section and cleaning section. 2. Drum motor (DM) ......... Drives the drum section. 3. Fixing motor (FM) ........Drives the fixing section. 4.
Page 189: Clutches And Heaters
2BA/B (4) Clutches and heaters 9 17 Machine left Machine inside Machine right Figure 2-2-4 Clutches and heaters 1. Upper feed clutch* (FCL-U) ......Primary paper roll feed from the upper roll unit. 2. Middle feed clutch (FCL-M) ......Primary paper roll feed from the middle roll unit. 3.
Page 190: Others
2BA/B (5) Others 2,3,4 Machine left Machine inside Machine right Figure 2-2-5 Others 1. LED printhead (LPH) ........Forms an image using the data from originals on the drum surface via LED illumination. 2. Right cleaning lump (CL-R) ......Removes residual charge from the drum surface. 3.
Page 191: Power Source Pcb
2BA/B 2-3-1 Power source PCB Transformer 24 V DC Noise Rectifier/ AC input filter 24 V DC smooth- circuit output ing circuit (L1) circuit (D1) (L2)* –12 V DC –12 V DC (Q1, output circuit Switching control circuit (IC1) –5 V DC –5 V DC Photo- output...
Page 192 2BA/B Figure 2-3-2 Power source PCB silkscreen image 2-3-2...
Page 193 2BA/B Terminals (CN) Voltage Remarks TB-1 TB-2 120 V AC AC supply, input 220 – 240 V AC TB-3 TB-4 120 V AC AC supply for MSW, output 220 – 240 V AC TB-5 TB-2 120/0 V AC PRY1 on/off, input 220 –...
Page 194: Engine Main Pcb
2BA/B 2-3-2 Engine main PCB Safety switch Address bus (U11) Data bus (U8) Therm- istor Boot ROM (U36) (U5) Total counter Scanner counter Switches Clutches sensors Figure 2-3-3 Engine main PCB block diagram The engine main PCB (EMPCB) centers on CPU U8 and includes the ROM and RAM circuit, I/O control circuit, analog signal input/output circuit and communication control circuit.
Page 195 2BA/B CN17 CN11 CN14 CN10 CN12 Figure 2-3-4 Engine main PCB silkscreen image 2-3-5...
Page 196 2BA/B Terminals (CN) Voltage Remarks 24 V DC 24 V DC supply, input 5 V DC 5 V DC supply, input 5 V DC 5 V DC supply, input 0 – 5 V DC DTH detection voltage, input 0/24 V DC ETTH on/off, output 0/5 V DC DPPCB DPS signal, output...
Page 197 2BA/B Terminals (CN) Voltage Remarks 0/24 V DC BFCL on/off, output 0/24 V DC RRCL on/off, output 0/24 V DC RFCL on/off, output 0/24 V DC FCL-U on/off, output* 0/24 V DC FCL-M on/off, output 0/24 V DC FCL-L on/off, output 0/24 V DC RWCL-U on/off, output* 6-10...
Page 198 2BA/B Terminals (CN) Voltage Remarks 13-B1 13-B2 0/5 V DC IPUPCB PRINT0 signal, input* 13-B3 13-B4 0/5 V DC IPUPCB PRDY0 signal, output* 13-B5 13-B10 0/5 V DC IPUPCB CMD0 signal, input* 13-B6 13-B10 0/5 V DC IPUPCB /CMD0 signal, input* 13-B7 13-B10 0/5 V DC...
Page 199 2BA/B Terminals (CN) Voltage Remarks 15-12 15-2 0/5 V DC OPCB KEY1 signal, output 15-13 15-2 0/5 V DC OPCB KEY2 signal, output 15-14 15-2 0/5 V DC OPCB KEY3 signal, output 15-15 15-2 0/5 V DC OPCB scan signal SCAN0, output 15-16 15-2 0/5 V DC...
Page 200: Operation Unit Pcb
2BA/B 2-3-3 Operation unit PCB KEY[0] CN1-1 KEY[1] CN1-2 KEY[2] CN1-3 KEY[3] CN1-4 D101 D102 D103 R104 SCAN[0] TR101 CN1-5 R107 R105 SCAN[1] CN1-6 TR102 R108 R106 SCAN[2] CN1-7 TR103 R109 R101 LED[0] CN1-8 Engine main R102 LED[1] CN1-9 TP10 R103 LED[2] CN1-10...
Page 201 2BA/B Selection of key switches and the lighting of LEDs of the operation unit PCB (OPCB) are determined by scan signals (SCAN[0] to SCAN[2]) from the engine main PCB (EMPCB) and LED lighting selection signals (LED[0] to LED[2]). The key switch (K1 to K10) operated is identified by the scan signals (SCAN[0] to SCAN[2]) and the return signals (KEY[0] to KEY[3]).
Page 202 2BA/B Terminals (CN) Voltage Remarks 0/5 V DC OPCB KEY0 signal, output 0/5 V DC OPCB KEY1 signal, output 0/5 V DC OPCB KEY2 signal, output 0/5 V DC OPCB KEY3 signal, output 0/5 V DC OPCB scan signal SCAN0, input 0/5 V DC OPCB scan signal SCAN1, input 0/5 V DC...
Page 203 2BA/B 2-4-1...
Page 204 2BA/B 2-4-2...
Page 205 2BA/B 2-4-3...
Page 206 2BA/B 2-4-4...
Page 207 2BA/B 2-4-5...
Page 208: General Wiring Diagram
General wiring diagram 2BA/B Wire color Symbol BLACK BROWN YELLOW GREEN BLUE WHITE PINK ORANGE LIGHT BLUE PURPLE 7 6 5 4 3 2 1 6 5 4 3 2 1 6 5 4 3 2 1 GRAY CON3 CON5 CON7 AC(L) AC(N)
Page 209: Power Source Wiring Diagram
Power source wiring diagram 2BA/B Upper roll unit Wier color Symbol (optional) Middle roll unit Lower roll unit PINK PRY2 PURPLE ORANGE W113 F24VR YELLOW W101 F24VR BLUE MHVT PRY3 24VR W112 24VR CON1 W108 W111 (SSW5/6) W112 W102 W113 PRY1 W111 W001 24VR...
Page 210 Siktgatan 2, 162 50 Vällingby, Sweden 2-28, 1-chome, Tamatsukuri, Chuo-ku Osaka 540-8585, Japan Phone: (08) 4719999 Phone: (06) 6764-3555 ©2001 KYOCERA MITA CORPORATION is a trademark of Kyocera Corporation is a registered trademark of KYOCERA MITA CORPORATION Printed in Holland...

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