Samsung ML-2851ND/XAZ Service Manual page 100

6) Cover Open
Description: The ERROR lamp is on even when the print cover is closed.
1. The hook lever in the
front cover or Guide rear
2. Check the connector
and circuit of the cover switch department
in the Main Control board.
Service Manual
Alignment & Troubleshooting
may be defective.
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