Samsung ML-651x series Service Manual page 198

● Code
H2-4A20
● Symptom / Cause
Mailbox Motors doesn't work.
Rear Door Opened, Micro Switch not assembled well or damaged, Harness Damaged. Main Board Damaged, door
fl ag damaged.
● Troubleshooting method
1. Check the Rear Door Closed fi rmly.
2. Check Mailbox Main Board Harness connection.
Service Manual
ML-551x / 651x series
4. Alignment and Troubleshooting
● Error message
Mailbox door is open. Close it
3. Check the Rear Door Switch Harness connection.
4. Check the Mailbox cover fl ag damaged.
5. If the same problem happens after checking 1~4,
6. If the same problem happens after checking 5,
4-103
replace the mailbox main board.
replace the mailbox harnesses.
Samsung Electronics