Service manual

2-98
Confidential
■ Completely blank
■ Vertical streaks
■ White vertical streaks
User Check
• Check if the first side and second side of the document are
reversed.
Step Cause Remedy
1 CIS unit failure Replace the document scanner unit.
2 Main PCB failure Replace the main PCB ASSY.
- ADF
User Check
• Check if the ADF glass or document glass is not stained.
Step Cause Remedy
1 CIS unit failure Replace the document scanner unit.
User Check
• Check if the ADF glass or document glass is not stained.
Step Cause Remedy
1
White level data malfunction Perform the acquisition of white level data.
("Function code 55")
2 CIS unit failure Replace the document scanner unit.