Defective Image Quality - Samsung SCX-4200 Series Service Manual

6.2.3 Abnormal noise
• Description There is noise from the Platen when copying.
Check and Cause
1. Check the Scan Motor and gesr.
2. Check the Motor Driver on Driver PBA.

6.2.4 Defective Image Quality

• Description The copied image is excessively light or dark
Check and Cause
1. Check shading profile.
2. Check the gap between original and scanner
glass.
3. Check printing quality.
Samsung Electronics
Solution
1. Check for correct assembly of gear and motor.
Ensure no parts are fouling and there are no foreign
objects in the mechanism or scanner path. Replace
any worn parts
2. Replace the main PBA.
Solution
1. Redo shading profile in the tech mode.
2. A gap of more than 0.5 mm can cause a blurred
image. Ensure cover close correctly. Replace as
necessary.
3. See "Print" troubleshooting.
Troubleshooting
Service Manual
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