Samsung ML-3471ND/XAX Service Manual page 122

Adjustment and Troubleshooting
6) Cover Open
Description: The ERROR lamp is on even when the print cover is closed.
top cover may be defective.
and circuit of the cover switch department
Service Manual
4-54
1. The hook lever in the
2. Check the connector
in the Main Control board.
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.
Samsung Electronics