Copy Problems; White Copy; Black Copy - Samsung SCX-4720F Service Manual

Troubleshooting

7.5 Copy Problems

7.5.1 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.

7.5.2 Black Copy

• Description Black page is printed out when Copying.
Check and Cause
1. Check for CCD problem on the Main PBA.
2. Check shading profile.
Service Manual
7-20
Solution
1. Room light can pass through a thin original.
2. Redo shading profile in the tech mode.
3. Replace the Main PBA.
Solution
1. Check the CCD harness is properly connected.
2. Redo shading profile in the tech mode.
Samsung Electronics