Service manual

4. Alignment and Troubleshooting
Service Manual
ML-551x / 651x series
4-107
Samsung Electronics
 Code
H2-4A3C
 Error message
Too much paper in mailbox bin 4. Remove printed paper
 Symptom / Cause
Mailbox bin 4 Full message pops when papers on that bin are stacked fully or the full sensor detecting mechanism
is out of order.
Mailbox Full detecting sensor damaged, harness connection not well or damaged, Main Board damaged.
 Troubleshooting method :
1. Check the Bin’s Full Sensor Connection and Actuator’s operation..
2. Check Main Board Harness connection.
3 . If the same problem happens after checking 1~2, replace the mailbox main board.
4. If the same problem happens after checking 3, replace the mailbox harnesses.