Samsung CLP-310N Service Manual page 118

11) Cover Open
Description
The ERROR lamp is on even when the print cover is closed.
1. The Hook Lever in the
top cover may be defective.
2. Check the connector
(Main B'D) and circuit of the cover
switch department in the Main
Control board.
Service Manual
Alignment & Troubleshooting
Replace the hook lever, if defective.
1. Check the insertion of the Cover Open S/W
Connect.
2. Replace the Main Control board or Cover
Open S/W.
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Samsung Electronics