Service manual

4. Alignment and Troubleshooting

Service Manual

ML-551x / 651x series

4-76

Samsung Electronics

 Code

H2-1A70

H2-1750

H2-1751

H2-1753

 Error message

Finisher Failure: #H2-1A70. Check ﬁ nisher

Finisher Failure: #H2-1750. Check ﬁ nisher

Finisher Failure: #H2-1751. Check ﬁ nisher

Finisher Failure: #H2-1753. Check ﬁ nisher

 Symptom / Cause

Stapler is not working well.

Stapler Harness Connection not well. Or Cartridge set sensors damaged, Or Main Board damaged.

 Troubleshooting method

NOTE - Make sure that the staple strips on top of

the stack are complete and ﬂ at. Remove any partial

strips and any strips that are bent.

1. Check the Main Board Harness Connection.

2. Check the Stapler harness connection.

3. Check if staples are stuck in Stapler Head area

and damage of Stapler itself.

4. If the same problem happens after checking 1~3,

Replace the Finisher main board.

5. If the same problem happens after checking 4,

Replace the Finisher Stapler.

6. If the same problem happens after checking 5,

Replace the Finisher harnesses.