Cover Open - Samsung SCX-4200 Series Service Manual

Troubleshooting
6.4.5 Paper Empty without indication
• Description
The paper empty message does not appear in the LCD when the paper cassette is empty.
Check and Cause
1. Deformed paper sensor actuator or faulty sensor.
2. SMPS PBA or Main PBA is defective
.

6.4.6 Cover Open

• Description
The Cover Open message appears on the LCD even when the print cover is closed.
Check and Cause
1. The 'Open Cover' microswitch may be stuck or faulty
2. The tab on the front cover may be damaged or broken
3. Check the connector and cables between Switch and
main PBA.
Service Manual
6-16
Solution
1. Replace the defective actuator.
2. Replace the SMPS PBA or MAIN PBA as
appropriate
Solution
1. Use TECH mode("cover sensor test") to check
cover switch operation. Check and replace switch if
necessary.
2. Replace the front cover.
3. Replace the Main Control board or Cover Open
S/W as necessary.
Samsung Electronics