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Chapter 9 Troubleshooting
9-1. Defective image and diagnosis flow ......... 9-1
9-1-1. Both sides and trailing edge is black
when making a reduced copy ................ 9-1
9-1-2. Background fogging
(White background fogging) ................... 9-2
9-1-3. Black lines ................................................ 9-3
9-1-4. Center deviation ....................................... 9-4
9-1-5. Smearing .................................................. 9-5
9-1-6. Light copy ................................................. 9-6
9-1-7. Dark copy ................................................. 9-7
9-1-8. Partial skipping of transfer ..................... 9-8
9-1-9. Copy is black ............................................ 9-9
9-1-10. No image ............................................... 9-10
9-1-11. Distorted image .................................... 9-11
9-1-12. White band ........................................... 9-12
9-1-13. Black band ............................................ 9-13
9-1-14. Density balance deviation ................... 9-14
9-1-15. Leading position deviation ................. 9-15
9-1-16. Contamination ...................................... 9-16
9-1-17. Jittering ................................................. 9-17
9-1-18. White dots on black matte section ..... 9-18
9-1-19. Extremely light copy ............................ 9-19
9-2. Operation defects ..................................... 9-20
9-2-1. Power does not turn ON ........................ 9-20
9-2-2. Copying operation is not possible ....... 9-20
9-2-3. Paper feed or conveyance defect ......... 9-20
9-2-4. Abnormal noise ...................................... 9-21
9-2-5. Special symptoms ................................. 9-22
9-2-6. Malfunction ............................................. 9-22
Chapter 9 Troubleshooting
9-1. Defective image and diagnosis flow
9-1-1. Both sides and trailing edge is black when making a reduced copy
Paper feeding direc-
tion
START
YES
Was copy made with platen Close the platen cover, make a copy, and reconfirm.
cover opened?
NO
YES
Is the side erase lamp surface dirty? Clean or replace.
NO
YES
Check the side erase lamp
Is the side erase lamp lit?
installation state.
NO
YES
Is the connector disconnected? Securely insert the connector.
NO
Control PCB defect -> Replace.
Wire harness defect -> Replace.
Side erase lanp defect -Replace.
9-1
Chapter 9 Troubleshooting
9-1-2. Background fogging (White background fogging)
Paper feeding direc-
tion
START
Is the designated rating Main erase lamp defect ->
YES NO Replace.
Replace or clean. exposure lamp installed? Is main erase lamp lit?
Is the platen glass surface Connector contact defect ->
dirty? Repair or replace.
Main PCB defect -> Replace.
YES
NO
YES Is the platen, glass, Is the developing bias NO High voltage PCB defect -> Replace.
Clean.
mirror or lens dirty? voltage correct?
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