Copy Problems; White Copy; Black Copy - Samsung SCX-4521F Series Service Manual

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.

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.
Samsung Electronics
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 CIS FFC Cable is properly connected.
2. Redo shading profile in the tech mode.
Troubleshooting
Service Manual
6-27