Service manual

4. Alignment and Troubleshooting
Service Manual
ML-551x / 651x series
4-101
Samsung Electronics
 Code
H2-4700
H2-4701
 Error message
Mailbox Failure: #H2-4700. Check mailbox.
Mailbox Failure: #H2-4701. Check mailbox.
 Symptom / Cause
Two Upper Gates seen when opening Rear Door is not operating well.
Upper Diverter Motor or Upper Diverter Sensor not assembled well or damaged. Harness Damaged. Main Board
damaged.
 Troubleshooting method
1. Check Upper Diverter Motor Harness connection.
2. Check Upper Diverter Sensor Harness
connection.
3. Check Mailbox Main Board Harness connection.
4. Check Upper 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.