White Line/Bands In Main Scan Direction Black Line/Bands In Main Scan Direction - Konica Minolta bizhub 40P Service Manual

Field Service Ver. 1.0 Dec. 2007
15.2.7 White line/bands in main scan direction
Black line/bands in main scan direction
A. Typical faulty Images
B. Troubleshooting procedure
Step Section
1
Media path
2
3 Transfer roller
4 Toner cartridge Is PC drum scratched or dirty?
5 Fuser unit
6 PH unit
⎯
7
Check item
Is the media path dirty with toner?
Is there foreign matter in the
media path?
Is the transfer roller dented,
scratched, or dirty?
Is the fusing roller scratched or
dirty?
Is the PH window dirty?
Is the problem eliminated after
checks have been made through
step 6?
15. Image quality problems
Result Action
YES Clean it.
YES Remove the foreign matter.
YES Replace the transfer roller.
YES Replace the toner cartridge.
YES Replace the fuser unit.
YES Clean the PH window.
Replace the print control board
(PRCB).
YES
Replace the MFP board (MFPB).
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