Canon iR C3200 Series Service Manual page 832

Chapter 16
F-16-48
16.3.2.8.12 Fine lines appearing randomly in main scanning direction
[ Inspected by Canon Inc. ]
Cause
As a result of inspection, the main controller PCB (sub) was found to be faulty.
Field Remedy
Replace the main controller PCB (sub) with a new one.
SUB CONTROLLER BOARD Ass'y:FG3-3133
<Tips for identifying a failure part>
1. Whether the problem is caused by the reader unit or printer unit?
- Output a test print and check whether the image is abnormal.
Yes: problem in the printer unit
No: problem in the reader unit
2. Whether the test print has margins (lead, trail, right and left)?
Yes: no problem in high voltage output
No: problem in high voltage output
3. If fines lines appear at dot intervals, it is possible that the main controller PCB can be possibly faulty.
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0003-8791