Samsung SCX4521F Service Manual - Page 122

Copy Problems, White Copy, Black Copy

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Troubleshooting 6.7 Copy Problems 6.7.1 White Copy • Description Blank page is printed out when copying. Check and Cause 1. Check the Scanner Cover is properly closed. 2. Check shading profile. 3. Check white/black reference voltage on Main PBA. Solution 1. Room light can pass through a thin original. 2. Redo shading profile in the tech mode. 3. Replace the Main PBA. 6.7.2 Black Copy • Description Black page is printed out when Copying. Check and Cause 1. Check for CIS problem on the Main PBA. 2. Check shading profile. Solution 1. Check the CIS FFC Cable is properly connected. 2. Redo shading profile in the tech mode. Samsung Electronics Service Manual 6-27

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Troubleshooting
Samsung Electronics
Service Manual
6-27
6.7.1
White Copy
• Description
Blank page is printed out when copying.
6.7 Copy Problems
6.7.2
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 FFC Cable 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.
1. Room light can pass through a thin original.
2. Redo shading profile in the tech mode.
3. Replace the Main PBA.