Service manual

4. Alignment and Troubleshooting

Service Manual

ML-551x / 651x series

4-86

Samsung Electronics

 Code

H2-4100

 Error message

Paper jam in front of mailbox. Remove paper

 Symptom / Cause

Paper doesn’t reach Mailbox’s Entrance Sensor.

Paper jam in IOT. Or Mailbox Lower Diverter operation not well. Or IOT Deﬂ ector Damaged. Or Mailbox Entrance

Sensor not working (Mailbox Entrance Sensor Damaged, Harness connection not well, MainBoard damaged)

 Troubleshooting method

1. Check Jam Occurrence in IOT.

2. Check IOT Deﬂ ector part’s operation.

3. Check Mailbox Main Board Harness connection.

4. Check Mailbox Entrance operation & harness

connection.

5. Refer to the Lower Diverter fault.

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.