Adjustment and Troubleshooting
4.2.3 Copy Problems
1) White Copy
Description: Blank page is printed out when copying.
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 Chip(U28)
Room light can pass through a thin original.
Redo shading profile in the tech mode.
Replace CN8 if it is defective.
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Service Manual
