Samsung ML-451 Series Service Manual page 172

4. Alignment and Troubleshooting
► Error Code
H2–1760
H2–1A80
► Error message
Error: #H2-1760 / Finisher Failure: #H2-1760. Check finisher
Error: #H2-1A80 / Finisher Failure: #H2-1A80. Check finisher
► Symptom
Stacker Level sensor, Stack Full sensor, Stacker Motor harness connection loose or damaged, Main Board is damaged.
► Troubleshooting method
1) Check the Main Board harness connection.
2) Check the Stacker Level Sensor's harness connection and Actuator's operation & its Spring behind the wall.
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