Konica Minolta BIZHUB 163 Service Manual page 228

Field Service Ver. 1.0 Apr. 2007
16.2.18 Printer section: Blank streaks or bands
A. Typical faulty images
B. Troubleshooting procedure
Step
PC drum ground terminal is dirty, scratchy, deformed, or
1
damaged.
DB of IU is plugged with foreign matter
2
(such as paper dust).
PC drum charge corona grid mesh and comb electrode
3
are dirty, scratchy, deformed, or damaged.
Post-fusing guide plate is dirty, scratchy, deformed, worn,
4
or damaged.
5 PH window of the PH unit is dirty, scratchy, or damaged.
White streaks
Check
16. Image quality problem
White bands
Result Action
• Clean, correct, or
YES
change.
YES • Remove foreign matter.
• Clean, correct, or
YES
change.
YES • Clean or change.
YES • Clean or change.
NO • Change IU.
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