Description: 1. Dark or blurry horizontal stripes occur in the printing periodically. (They may not occur periodically.)
Causes: 1. Bad contacts of the voltage terminals to developer. 2. The rollers of developer may be stained. Charge roller = 37.7 mm Supply roller = 37 mm Develop roller = 35.3 mm Transfer roller = 45.3 mm
Remedy: 1. Clean each voltage terminal of the Charge, Supply, Develop and Transfer roller. (remove the toner particles and paper particles) 2. Clean the right Gear that has a relatively small gap of the teeth in the OPC. 3. If the malfunction persists, replace the developer.
Code: 20
Display: Black/White Spot
Description: 1. Dark or blurry black spots occur periodically in the printing. 2. White spots occur periodically in the printing.
Causes: 1. If dark or blurry black spots occur periodically, the rollers in the Developer may be contaminated with foreign matte or paper particles. ( Charge roller : 37.7 mm interval OPC drum : 75.5 mm interval) 2. If faded areas or voids occur in a black image at intervals of 75.5 mm, or black spots occur elsewhere, the OPC drum surface is damaged. 3. If a black image is partially broken, the transfer voltage is abnormal or the transfer roller's life has expired.
Remedy: 1. Run OPC cleaning Mode Print and run the Self-test 2 or 3 times. 2. In case of 75.5 mm interval unremovable in 1, cleanly remove foreign substances stuck on the OPC location equivalent to black spots and white spots with a dry duster. 3. The transfer roller guarantees 60,000 sheets printing. If the roller's life is expired, replace it. 4. In case of 37.7 mm interval unremovable in 1, take measures as to replace the developer cartridge and try to print out. 5. Clean the inside of the set against the paper particles and foreign matter in order not to cause the trouble.
Code: 21
Display: Light Image
Description: The printed image is light, with no ghost.
Causes: 1. Develop roller is stained when the toner of developer cartridge is almost consumed. 2. Ambient temperature is below than 10°C. 3. Bad contact caused by the toner stains between the high voltage terminal in the HVPS and the one in the set. 4. Abnormal output from the HVPS. (Run self-test and check 1-4)
Remedy: 1. Check if the Toner Save Mode is off. 2. No 1 : Replace the developer cartridge and try to print out. 3. No 2 : Wait 30 minutes after printer is powered on before you start printing. 4. No3 : Clean up the contaminated area by the toner. 5. Replace the HVPS if the problems are not solved by the above four directions.
Code: 22
Display: Dark Image or a Black
Description: The printed image is dark.
Causes: 1. No charge voltage in the Main PBA. ( Perform Engine Test Mode : Diagnostic code 4 HVPS check.) 2. Charge voltage is not turned on due to the bad contacts between power supply in the side of the Developer and charge terminal of HVPS.
Remedy: 1. Clean the high voltage charge terminal. 2. Check the state of the connector which connects the engine board and HVPS. 3. If steps 1 and 2 above did not correct the problem, replace the HVPS
Code: 23
Display: Uneven Density
Description: Print density is uneven between left and right.
Causes: 1. The pressure force on the left and right springs of the transfer roller is not even, the springs are damaged, the transfer roller is improperly installed, or the transfer roller bushing or holder is damaged. 2. The life of the Developer has expired. 3. The toner level is not even on the developer roller due to the bad blade.
Remedy: 1. Replace both the left and right Spring Holder. 2. Problem with the toner cartridge, replace the toner cartridge and try to print out.
Code: 24
Display: Background
Description: Light dark background appears in whole area of the printing.
Causes: 1. Recycled recording paper has been used. 2. The life of the Developer has expired. 3. The up-to-down movement of the transfer roller is swift? 4. The HVPS is normal? (Perform Engine Test Mode diagnostic code 4)
Remedy: 1. Quality is not guaranteed when using recycled paper. 2. Replace the toner cartridge. 3. Clean the busing on the transfer roller. 4. Replace the HVPS.