7-8
Troubleshooting
Service Manual
7.2.1 White Copy
• Description
Blank page is printed out when copying.
7.2 Copy Problems
7.2.2 Black Copy
• Description
Black page is printed out when Copying.
Check and Cause Solution
1. Check for CIS problem on the Main PBA.
2. Check shading profile.
1. Check the CIS harness is properly connected.
2. Redo shading profile in the tech mode.
Check and Cause Solution
1. Check the Scanner Cover is properly closed.
2. Check shading profile.
3. Check white/black reference voltage on Main PBA. e.q
• CIS_SI, CIS_CLK at CN7
• Or Check the FFC
1. Room light can pass through a thin original.
2. Redo shading profile in the tech mode.
3. Replace CN7 if it is defective.
• CN7-Pin6(CIS-SI)
• CN7-Pin7(CIS-CLK)
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