Samsung SCX4521F Service Manual - Page 105

No error message when the cover is open, Cover Open, Replace the Main Control board or HVPS S/W

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Page 105 highlights

Troubleshooting 6.3.6 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 HVPS and main PBA. 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 HVPS as necessary. 6.3.7 No error message when the cover is open • Description The Cover Open message does not appears on the LCD even when the print cover is open. Check and Cause 1. The 'Open Cover' microswitch may be stuck or faulty 2. Check the connector and cables between HVPS and main PBA. Solution 1. Use TECH mode("cover sensor test") to check cover switch operation. Check and replace switch if necessary. 2. Replace the Main Control board or HVPS S/W as necessary. 6-10 Service Manual Samsung Electronics

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Samsung Electronics
Service Manual
Troubleshooting
6-10
6.3.7
No error message when the cover is open
• Description
The Cover Open message does not appears on the LCD even when the print cover is open.
Check and Cause
Solution
1. The ‘Open Cover’ microswitch may be stuck or faulty
2. Check the connector and cables between HVPS and
main PBA.
1. Use
TECH
mode(“cover sensor test”) to check
cover switch operation. Check and replace switch if
necessary.
2. Replace the Main Control board or HVPS S/W as
necessary.
6.3.6
Cover Open
• Description
The Cover Open message appears on the LCD even when the print cover is closed.
Check and Cause
Solution
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 HVPS and
main PBA.
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 HVPS as
necessary.