EPSON L-800 - L-801 - PRINTER - ADJUSTMENTS AFTER DISASSEMBLY or REPAIR

ADJUSTMENTS

Adjustment Item	Purpose	Method Outline	Tool
PG adjustment	Install the Head Nozzle surface parallel to the printing surface and set the gap between the paper and the HeadNozzle surface to the specified value	Mechanical adjustment using the thickness gauges. Make a proper adjustment according to the result whether the manually-moved carriage (printhead) runs over or hits against the gauges placed on the platen.	Thickness Gauge 1.15 mm, 1.3 mm
EEPROM data copy	When the main board needs to be replaced, use this to copy adjustment values stored on the old main board to the new board. If this copy is completed successfully, all the other adjustments required after replacing the main board are no longer be necessary	Readout the EEPROM data from the main board before removing it. Then replace the board with a new one, and load the EEPROM data to the new board	Adjustment Program
Initial setting	This must be carried out after replacing the main board to apply settings for the target market. Whenthis function is performed, the upper limit value of the ink tube ounter is automatically set. With this function, the serial number written on the main board can be checked, and also writing the serial number to the main board can be performed when replacing the board	Select the target market. The selected market settings are automatically written to the main board. When writing the serial number, enter and re-enter (for confirmation) the printer serial number, then press the input button.	Adjustment Program
Head ID input	This must be carried out after replacing the print head in order to enter the new print head ID (Head ID) that reduces variation between print heads	Enter the ID printed on the Head QR code label attached on the print head. The correction values are automatically written to the main board.	Adjustment Program
Initialize PF deterioration offse	Resets the counter to maintain paper feed accuracy which decreases due to paper dust.	Reset the counter to its default	Adjustment Program
Disenable PF deterioration offset	When reading the counter value fromthe old main board is impossible in the case of replacing the board, use this to set the counter to its maximum value.	Set the counter to its maximum value (3000).	Adjustment Program
TOP margin adjustment	This corrects top margin of printout.	A top margin adjustment pattern is printed. Examine the lines printed near the top edge of the printout, and enter the value for the line that is exactly 3 mm away from the top edge.	[1]Adjustment Program [2] Ruler
Head angular adjustment	This must be carried out after replacing the print head in order to correct tilt of the print head by software	A head angular adjustment pattern is printed. Examine the printed lines and enter the value for the most straight lines	Adjustment Program
Bi-D adjustment	Corrects print start timing in bi-directional printing to improve the print quality	A Bi-D adjustment pattern is printed. Examine the patterns and enter the value for the pattern with no gap and overlap for each mode	Adjustment Program
First dot position adjustment	Corrects left margin of printout. The print start position in the carriage moving direction is corrected by software	A first dot adjustment pattern is printed. Examine the lines printed near the left edge of the printout and enter the value for the line that is exactly 5 mm away from the left edge	[1]Adjustment Program [2] Ruler
PW adjustment	This adjustment is made to correct the mounting position of the PW Sensor on a software basis to adjust the detection position and Nozzle position dispersion.	A PW adjustment pattern is printed. Examine the printout patterns and enter the value for the line that is exactly 5mm away from the paper edge for each of the left, right, top and bottom	Adjustment Program Ruler.
PF adjustment	Corrects variations in paper feed accuracy when using the Microweave to achieve higher print quality.	A PF adjustment pattern is printed. Examine the printout patterns and select the value for the best pattern. The correction value is registered.	Adjustment Program
BRS/PFP adjustment	This adjustment is made to ensure high print quality at high print speed.	Print the adjustment pattern to be scanned by a specified scanner. According to the scanned result, a correction value is automatically calculated and stored into the serial flash ROM on the main board. The correction value isapplied when printing in the corresponding mode. For some scanners, two PFP base scales are required	[1] Specified Scanner [2]  PFP base scale
CR motor heat protection control	This must be carried out for efficient heat control of the CR motor. Electrical variation of the motor and the power supply board are measured to acquire correction values for them	Select the parts that you replaced. The correction values are automatically written to the main board.	Adjustment Program

MAINTENANCE ITEMS

Maintenance Item	Purpose	Method Outline	Tool
Head cleaning	This function is used to execute Cleaning efficiently when ink is not delivered from the Head properly, e.g. dot missing	The cleaning can be selected from the normal cleaning or the power cleaning. Whether to reflect the discharged ink amount to the waste ink pad counter or not can also be selected as an option. The head cleaning is performed automatically. After the cleaning, print a nozzle check pattern to check if all nozzles are firing ink properly.	Adjustment Program
Maintenance counter	The printer causes a maintenance error when the maintenance counter (for the Waste Ink Tray, Waste Ink Pad Lower) reaches its maximum. Use this to reset the counter after replacing the Waste Ink Pad and Waste Ink Pad Lower, and use this to reset the ink tube counter when replacing the Ink Supply Tube. If you find the counter is close to the maximum during servicing, carry out the pad replacement and the counter reset to avoid the printer returned from the user due to the maintenance error	Select the replaced parts, and reset the corresponding counters.	Adjustment Program
Ink charge	This function is used to charge ink to the components composing the ink path such as Print head after replacing them	The ink charge can be selected from the charge to Print head only or the charge through Ink Tube, Adapter to Print head. Whether to reflect the discharged ink amount to the waste ink pad counter or not can also be selected as an option. Select the range to charge ink and options, and then press the execute button to execute the ink charge to the selected range automatically. After ink charge, print a nozzle check pattern to check if all nozzles are firing ink properly.	Adjustment Program
Small ink counter reset	When an ink out error occurs even though some ink is still in the Ink Supply Tank Assy (in the case when the ink counter in the printer and the actual ink remaining amount do not match), this function can decrease the ink counter (resetting the counter partially) to adjust the counter with the actual ink remaining amount	If the execute button is pressed, the ink counter value is automatically set. But if no ink out error is occurring, the message which says the function cannot be executed appears and no reset will be made.	Adjustment Program

Final check pattern print	A4 size US Letter size	Use this to check if the all adjustments have been properly made.	The all adjustment patterns are printed automatically.
EEPROM dump	Use this to readout the EEPROM data for analysis		The all EEPROM data is automatically readout and stored as a file

HOW TO DISASSEMBLE LASER/SCANNER UNIT - DRIVE ASSEMBLY & Other Assemblies - CANON LPB1120 - LASER COPIER

• Remove the rear cover, left/right cover, and upper cover.
• To enable the disconnection of the connectors, peel off the Warning label (laser) halfway.
• Disconnect the 2 connectors, and remove the 4 screws; then, detach the Laser/scanner unit.

[1] Do not disassemble the Laser/scanner unit; you will not be able to adjust it in the field.

[2] There is no Warning label (laser) used on the Laser/scanner unit offered as a service part. If you are replacing the assembly, remove the label from the existing assembly, and transfer it to the new assembly. Or, use the newly available Warning label. Be sure also to fully hide the connector openings from view.

DRIVE ASSEMBLY

• Remove the rear cover and the left/right cover.
• Remove the 2 screws and 2 screws equipped with a washer. Slide out the drive assembly slightly, and disconnect the connectors to remove the drive assembly.

FEED ASSEMBLY

• Remove the engine controller assembly.
• Free the 2 claws, and remove the 2 gears and the screw.

• Push the 2 claws, and remove the bushing.

• Remove the 2 screws, and disconnect the 2 connectors; then, remove the feed assembly.

DELIVERY ASSEMBLY

• Open the cartridge cover.
• Remove the boss, and remove the facedown delivery roller bushing; then, slide the face-down delivery roller to the right to detach.
• Pull the pressure release lever to the front to release the pressure.
• Remove the 2 screws, and slide the delivery assembly to the right to detach.

FIXING FILM UNIT

• Remove the rear cover and the left/right cover.
• Remove the delivery assembly.
• With the pressure release lever shifted up, push down on the fixing pressure unit (left/right) from above; then, slide it to the rear to detach.

• Disconnect the connector.
• Disconnect the connector, and free the harness from the harness guide.
• Remove the fixing film unit.

MALFUNCTION TROUBLESHOOTING - CANON LPB1120 - COPIER

TROUBLESHOOTING

Laser Failure/BD Failure

Possible Causes

  The laser shutter cannot be opened due to the damaged claw of the cartridge cover.

Action: Replace the cartridge cover.

  Poor contact in the connectors in the laser scanner unit.

Action: Reconnect the connector J801F, J802F on the laser/scanner unit and connector J208F on the engine controller PCB.

  Defective laser/scanner unit.

Action: Turn ON the printer. Immediately after turning ON the printer, if the voltage between the connectors J208M-5 and J208M-6 on the engine controller PCB is about +5V and also the voltage between the connectors J208M-1 and J208M-4 is about +24V, replace the laser/scanner unit.

  Defective engine controller PCB.

Action: Replace the engine controller PCB.

Fixing Unit Failure

Possible Causes

  Poor contact in the connectors.

Action: Reconnect the connector J206 on the engine controller PCB.

  Broken wire or short-circuited thermistor.

Action: Turn OFF the power and remove the fixing unit from the printer. Measure the resistance between the connectors J703-1 and J703-2 on the fixing unit side. If the resistance is not within the range from about 250 kΩ to about 800 kΩ (room temperature), replace the fixing film unit.

  Broken wire of the heater or blown thermal fuse.

Action: Remove the fixing unit. Check the connectors J102F-1 and J102F-2 on the fixing unit side for continuity. If the connectors have no continuity between them, replace the fixing film unit.

  Defective engine controller PCB.

Action: Replace the engine controller PCB.

Although a paper jam has not occurred, the printer cannot enter the READY mode, outputting a “JAM” status.

Possible Causes

  Defective paper delivery sensor spring.

Action: If the spring is not installed correctly, reinstall it correctly. Or, if the spring is deformed or damaged, replace it.

  Defective paper delivery sensing lever.

Action: If the lever is not installed correctly, reinstall it correctly. Or, if the lever is deformed or damaged, replace it.

  Defective paper top sensor spring.

Action: If the spring is not installed correctly, reinstall it correctly. Or, if the spring is deformed or damaged, replace it.

  Defective paper top sensing lever.

Action: If the lever is not installed correctly, reinstall it correctly. Or, if the lever is deformed or damaged, replace it.

  Defective engine controller PCB.

Action: Replace the engine controller PCB.

Although the door is closed after installing the cartridge, the printer cannot enter the READY mode, outputting a “DOOR OPEN” status.

Possible Causes

  Damaged claw of the door switch on the connector holder.

Action: Replace the connector holder.

  Defective door open detection unit.

Action: Replace the door open detection unit.

  Defective door open detection switch / engine controller PCB.

Action: Replace the engine controller PCB.

Although paper is set in the printer, the printer cannot enter the READY mode, outputting a “PAPER OUT” status.

Possible Causes

  Defective paper out sensing lever.

Action: If the lever is not installed correctly, reinstall it correctly. Or, if the lever is deformed or damaged, replace it.

  Defective paper out sensor.

Action: Replace the paper out sensor (PS003.)

  Defective engine controller PCB.

Action: Replace the engine controller PCB.

Although the cartridge is installed in the printer, the printer cannot enter the READY mode, outputting a “NO CARTRIDGE” status.

Possible Causes

  Poor contact in the primary high-voltage contact on the engine controller PCB and cartridge contact.

Action: Clean the contacts if dirty. If the problem still remains after cleaning, or parts are deformed or damaged, replace them.

  Defective cartridge.

Action: Replace the cartridge.

  Defective engine controller PCB.

Action: Replace the engine controller PCB

SANYO CP-21G1[A] - Australia - HOW TO ENTER SERVICE MODE Initializing procedure after Memory IC replacement

SERVICE MODE

• Press and hold the MENU button on the Remote Control and press the VOLUME (+) button on the TV set.

Following setting items appears on the screen.

• Select item by pressing the TIMER (Item No. UP) or SOUND MUTE (Item No. DOWN) button on the remote control handset.

• Adjust data value by pressing the VOLUME +or VOLUME -button on the remote control handset.
• To return to normal TV mode, press the MENU button on the TV set or the remote control handset.

INITILIZING

   The CPU (IC801) and memory IC (IC802) store the service adjustments data and controls data for each circuit. When the Memory IC(IC802) is replaced, some of the service adjustments should be readjusted to obtain the best performance. Using the RC handset carries out the necessary service adjustments.

Set up the TV set with following steps.

• Put a new memory IC.
• Turn on the TV set.
• Press and hold the TV/AV Selector on the TV set for more than 2 seconds. The following picture appears on the screen.

• Press the PROGRAMME Upon the TV set while the above On-Screen Display is still on the screen. The following picture appears on the screen.

• This completes the initialization of memory IC.

Following shows the initialized contents of memory data by this procedure.

Plug & Play : No executed

Inhibit Data : Cancelled

Ch Skip Data : Cancelled

Sound Volume Data : 10/63 steps.

Volume Lock : OFF

Tuning Lock : OFF

Music Mode : OFF

AV Start : OFF

Colour System : AUTO

• Required Service Adjustments

Readjust the following service adjustments.

1. Adjustments Service Mode No.& Item
2. RF AGC Item 01, RF AGC
3. Horizontal center Item 02, H-PHA
4. Vertical size Item 04, V-SIZE
5. Vertical-S correction Item 05, V-SCO
6. Vertical linearity Item 06, V-LIN

SANYO LCD-27XL2 - LCD-27XL2B - HOW TO ENTER SERVICE MODE - OPTION SETTINGS - INITIALIZATION - Protection circuit - Universal Remote Control Set-up Codes

TO ENTER SERVICE MODE

• Press and hold the SOUND button of the remote control and press the CHANNEL DOWN (P▼) button on the front  control panel of the TV, and the Main menu of service mode will be displayed.

MAIN MENU

• To select Service Section: Press the Cursor or button on the remote control handset, and press the VOLUME + button to enter the Sub menu.
• To change data value: Select service item by pressing the Cursor UP or DN , and change data value by pressing  the VOLUME + or - button.
• To return to the Main menu, press the MENU button.
• Exit from the Service Menu Press the MENU button repeatedly or turn off the TV set by pressing the Power ON/OFF button.

TO INITIALIZE MEMORY IC [After IC replacement]

• To initialize the Memory IC (IC802), press and hold the IMAGE button on the remote control, then press the CHANNEL DOWN button on the front panel of the TV set and then turn the Mains switch off and on. The initialization is now completed.
• When initialized the memory IC and all of the setting data (option data and service adjustment data) stored in the IC are reset to the default value. It is necessary to set the option settings and readjust the service adjustments. 

PROTECTION CIRCUIT

• This TV set has a built-in power supply protection circuit.
• It is provided to protect the TV set in case of a power supply circuit malfunctions. When something abnormality occurs during TV reception, the TV set goes to the stand-by mode.
• When operating the Protection Circuit, the Stand-by and Power Indicator will blink.

Releasing the protective circuit and restoring power supply

• To release the protective circuit and restore power supply, disconnect the AC cord for a short time. This will work only if the power supply trouble was temporary. If there is permanent trouble such as a damaged circuit, power cannot be restored and the circuit will have to be repaired.

OPTION SETTINGS

• The memory IC (IC802) stores the option data of TV set and service adjustments data for each circuit, therefore, when the memory IC is replaced, it should be programmed to the following settings.
• Press and hold the MUTE button on the remote control and press the CHANNEL DOWN (P▼)button on the front control panel of the TV. The option window will appear on the screen.

How to make the Option Setting

• Select desired option item by pressing the CHANNEL UP or DOWN button.
• To switch the option mode, use the VOLUME +or -button.
• The data, which is set in the option mode, is stored into the memory IC automatically.
• Exit from the Option Mode: Press the MENU button or turn off the TV set by pressing the Power ON/OFF button.

{Click on pictures to Zoom In}

Universal Remote Control Set-up Codes

With GE universal remote control: 0049 0097 0110 0004 0268 0012 0108 0180 {004, 012, 013, 048, 049, 050, 080, 097, 107, 108, 110, 162, 169, 180, 209, 268}

With RCA RCR 311W:  1047, 1078, 1080, 1121, 1129, 1163

With RCA RCR 312W: 10054, 10154, 10159, 11142

With 6-in-1 super remote: 024,026,036

With Philips Magnavox: 002 412 506 619 902

Others: 1073 1079 1069 1072 1145 1423 10611178 1047 1171 1298 1316 1347 1349 1143 1157 1172 1208 1360 1024 1115 1052 1232 1046

SAMSUNG CL29X50 - POWER SUPPLY [SMPS] - SCHEMATIC [Circuit Diagram] - STR-X6750F

POWER SUPPLY SCHEMATIC

CLICK ON SCHEMATICS TO ZOOM IN

HOW TO DISASSEMBLE - CANON LBP-1120 - LASER PRINTER

DISASSEMBLE 

Rear Cover

• Remove the screw.
• Locate the claw under the area indicated by an arrow. Open the bottom of the left/right side of the rear cover, and slide it to the front; free the claw, and lift the rear cover to detach.

Right Cover

• Remove the rear cover.
• Open the cover of the cartridge assembly.
• Remove the screw and, free the claw under the area indicated by an arrow, and frees the hook; then, detach the right cover.

Left Cover

• Remove the screw
• Open the cover of the cartridge assembly.
• Remove the screw and, free the laws under the area indicated by an arrow, and free the hook; then, detach the left cover.

Upper Cover

• Remove the rear cover and the left/right cover.
• Disconnect the connector J203 from the engine controller PCB; then, free the harness from the guide.
• Remove the 2 screws, and free the 2 claws; then, detach the upper cover.

Cartridge Cover

• Remove the rear cover and the left/right cover.
• Open the cartridge cover.
• Force the front cover down to detach.
• While pushing the claw, detach the cartridge cover from the arm.

• Slide the shaft, and detach the cartridge cover.

Pickup Tray

• Remove the rear cover.
• Slide up the pickup tray to detach.

HOW TO TROUBLESHOOT PAPER JAM - CANON LBP1120 - LASER PRINTER

PAPER JAM

The paper path can be divided into two sections: 1) paper pickup and feed block, and 2) fixing and delivery block.

Paper Pickup Unit

Possible Causes

1. The paper top sensing lever does not move smoothly or is damaged.

Action: If the lever is not installed properly, reinstall it correctly. If the lever is damaged or deformed, replace it.

2. Defective paper top sensing lever spring.

Action: If the spring is out of place, set it in the right position. If the spring is deformed or damaged, replace it.

3. Worn, deformed or dirty pickup roller or feed roller

Action: Clean the rollers if dirty. If the rollers are worn or deformed, replace them.

4. Defective lifting plate spring

Action: If the spring is out of place, set it in the right position. If the spring is deformed or damaged, replace it.

5. Poor contact in the connectors on the main motor drive signal line.

Action: Reconnect the connector J007F on the main motor.

6. Poor contact in the connectors on the pickup roller solenoid drive signal line.

Action: Reconnect the connector J204F on the engine controller PCB.

7. Defective pickup roller solenoid

Action: Disconnect the connector J204F on the engine controller PCB. Measure the resistance between the connector J204-1 and J204-2 on the cable side. If the measured value is not about 120Ω, replace the pickup roller solenoid.

8. Defective paper top sensor.

Action: Replace the paper top sensor.

9. Defective main motor.

Action: Replace the main motor.

10. Defective engine controller PCB.

Action: Replace the engine controller PCB.

Fixing and Delivery Unit

Possible Causes

1. Defective deflector.

Action: If the deflector is worn, broken, nicked or damaged, replace it.

2. Dirty or scarred fixing unit entrance guide or toner build-up on the guide.

Action: Clean the guide if dirty. Replace the guide if the dirt cannot be removed.

3. The pressure (nip width) of the pressure roller is not within the specification.

Action: Replace the fixing pressure units.

4. The pressure roller does not rotate smoothly.

Action: Check whether the gear is worn or damaged. If the pressure roller is worn, replace it.

5. Deformed or damaged fixing film unit and pressure roller.

Action: If the fixing film unit and pressure roller are deformed or damaged, replace them.

6. The paper delivery sensing lever does not move smoothly or is damaged.

Action: Adjust the lever to move smoothly. Replace the lever if damaged.

7. Defective paper delivery sensing lever spring.

Action: If the spring is out of place, set it in the right position. Replace the spring if damaged or deformed.

8. The fixing delivery roller does not rotate smoothly.

Action: Check the gears, and replace any worn or fractured gear(s). If the fixing delivery roller is worn, replace it.

9. The facedown delivery roller does not rotate smoothly.

Action: Check the gears, and replace any worn or fractured gear(s). If the face down delivery roller is worn, replace it.

10. Defective engine controller PCB.

Action: Replace the engine controller PCB.

CANON - LBP-1120 - LASER PRINTER - IMAGE DEFECTS & TROUBLESHOOTING

IMAGE DEFECTS

Light

Possible Causes

1. Improperly adjusted image density.

Action: Adjust the image density by operating the external device.

2. Open the cartridge covers and remove the EP-22 cartridge while printing. Open the drum protective shield of the cartridge and check the toner image on the photosensitive drum surface. If the toner image has not been transferred onto the paper properly, go to step 3). If the toner image on the drum is faint, go to step 6).

Do not open the drum protective shield for more than 10 seconds.

3. Deformation or deterioration of the transfer-charging roller.

Action: Replace the transfer-charging roller.

4. Poor contact in the transfer charging roller contact on the engine controller PCB and the transfer-charging roller shaft contact.

Action: Clean the contacts if dirty. If the problem still remains after cleaning, or parts are deformed or damaged, replace them.

5. Defective laser/scanner unit.

Action: Replace the laser/scanner unit.

6. Defective engine controller PCB.

Action: Replace the engine controller PCB.

Completely Blank

Possible Causes

1. Damaged laser shutter open/close projection of the cartridge cover.

Action: Replace the cartridge cover.

2. Poor contact in the developing bias contact on the engine controller PCB and cartridge contact.

Action: Clean the contacts if dirty. If the problem still remains after cleaning, or parts are deformed or damaged, replace them.

3. Defective engine controller PCB.

Action: Replace the engine controller PCB.

All Black

Possible Causes

1. Poor contact in the primary high voltage contact on the engine controller PCB and cartridge contact.

Action: Clean the contacts if dirty. If the problem still remains after cleaning, or parts are deformed or damaged, replace them.

2. Defective primary charging roller.

Action: Replace the cartridge.

3. Defective engine controller PCB.

Action: Replace the engine controller PCB.

Dirt on Back of Paper

Possible Causes

1. Dirty feed guide or fixing unit entrance guide.

Action: Clean the dirty areas.

2. Dirty delivery roller.

Action: Clean the delivery roller.

3. Periodic dirt (transfer charging roller, pressure roller).

Action: Identify and clean the dirty roller. If dirt cannot be removed, replace the dirty roller.

Dirt

Possible Causes

1. Dirty facedown delivery sub-roller or fixing delivery sub-roller.

Action: Clean the facedown delivery sub-roller or fixing delivery sub-roller.

2. Periodic dirt (pickup roller, fixing film unit, EP-22 cartridge).

Action: Identify and clean the dirty part(s). If the dirt cannot be removed, replace the dirty part(s).

Black vertical lines

Possible Causes

1. Circumferential scars on the photosensitive drum.

Action: Replace the cartridge.

2. Dirty fixing unit entrance guide.

Action: Clean the guide.

3. Scar(s) on fixing film unit.

Action: Replace the fixing film unit

White Vertical Lines

Possible Causes

1. Lack of toner

Action: Remove the cartridge from the printer. Rock the cartridge in the manner described on V-B-c of

Chapter 1, and then install it backs to the printer. If the problem still remains, replace the cartridge.

2. Circumferential scars on the photosensitive drum.

Action: Replace the cartridge.

3. Foreign materials are deposited on the laser outlet of the printer or the laser inlet of the cartridge.

Action: Remove the foreign materials.

4. Dirty face down delivery sub-roller or fixing delivery sub-roller.

Action: Clean the sub-rollers.

5. Dirt or foreign materials on the fixing unit entrance guide.

Action: Clean the fixing unit entrance guide.

6. Foreign materials on the fixing film unit.

Action: Replace the fixing film unit.

7. Defective developing cylinder.

Action: Replace the cartridge.

8. Dirty mirror in the laser/scanner unit.

Action: Replace the laser/scanner unit.

Black Horizontal Lines

Possible Causes

1. Horizontal scar(s) on the photosensitive drum.

Action: Replace the cartridge.

2. Dirty, deformed or worn fixing film.

Action: Replace the fixing film unit.

White Horizontal Lines

Possible Causes

1. Horizontal scar(s) on the photosensitive drum.

Action: Replace the cartridge.

2. Defective fixing film unit.

Action: Replace the fixing film unit.

Blank Spots

Possible Causes

1. Lack of toner.

Action: Remove the cartridge from the printer. Rock the cartridge1, and then install it back to the printer. If the problem still remains, replace the cartridge.

2. Dirty or deformed transfer charging roller.

Action: Replace the transfer-charging roller.

3. Defective photosensitive drum or developing cylinder.

Action: Replace the cartridge.

Poor Fixing

Possible Causes

1. The nip width of the fixing unit is not within the specification.

Action: Replace the fixing pressure units.

2. Dirty pressure roller.

Action: Clean the pressure roller. If the dirt cannot be removed, replace the pressure roller.

3. Scar(s) or dent(s) on the pressure roller surface.

Action: Replace the pressure roller.

4. Scar(s) or dent(s) on the fixing film.

Action: Replace the fixing film unit.

5. Deterioration of the thermistor.

Action: Replace the fixing film unit.

Image Distortion

Possible Causes

1. Poor contact in the connectors on the laser/scanner unit.

Action: Reconnect the connector J208F on the engine controller PCB, or connector J801F and J802F on the laser/scanner unit correctly.

2. Defective laser/scanner unit.

Action: Replace the laser/scanner unit.

3. Defective engine controller PCB.

Action: Replace the engine controller PCB.

Faulty Registration

Possible Causes

1. Dirty or worn pickup roller.

Action: Clean the pickup roller. Replace the roller if the dirt cannot be removed or the roller is worn.

2. Dirty or worn feed roller.

Action: Clean the feed roller. Replace the roller if the dirt cannot be removed or the roller is worn.

3. Defective paper top sensing lever.

Action: Replace the lever if it does not move smoothly or is damaged.