Service manual

4. Alignment and Troubleshooting
Service Manual
ML-551x / 651x series
4-102
Samsung Electronics
 Code
H2-4710
H2-4711
 Error message
Mailbox Failure: #H2-4710. Check mailbox.
Mailbox Failure: #H2-4711. Check mailbox.
 Symptom / Cause
The Lowest Gate seen when opening Rear Door is not operating well.
Lower Diverter Motor or Lower Diverter Sensor not assembled well or damaged. Harness Damaged. Main Board
damaged.
 Troubleshooting method
1. Check Lower Diverter Motor Harness connection.
2. Check Lower Diverter Sensor Harness
connection.
3. Check Mailbox Main Board Harness connection.
4. Check Lower Diverter operation.
5. Check Mailbox Gate operation.
6. If the same problem happens after checking 1~5,
replace the mailbox main board.
7. If the same problem happens after checking 6,
replace the mailbox harnesses.