Copy Problems; White Copy; Black Copy - Samsung SCX-4100 Service Manual

Troubleshooting

7.2 Copy Problems

7.2.1 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. e.q
• CIS_SI, CIS_CLK at CN7
• Or Check the FFC

7.2.2 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.
Service Manual
7-8
Solution
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)
Solution
1. Check the CIS harness is properly connected.
2. Redo shading profile in the tech mode.
Samsung Electronics