Samsung ML-651x series Service Manual page 204

● Code
M1-3122
● Symptom / Cause
Tray1 is not installed properly.
1. Tray1 is not installed.
2. Paper Size Sensor is defective.
3. Harness connection error.
● Troubleshooting method
1. Install the tray1.
2. Check if the paper size sensor is working properly.
3. Check if the harness is connected to the connector properly.
● Code
M1-4111
● Symptom / Cause
The paper has jammed in the path or can't be fed.
1. Pick up error
2. Multi-feed error
3. Skewed or Wrinkled page
● Troubleshooting method
1. Check if the pick up/ forward/ retard roller is contaminated or worn out. Replace the defective
roller.
2. Check if each sensor is working properly.
3. Check if there is any jammed paper in the path. Remove it.
4. When loading the paper, adjust the paper guide.
Service Manual
ML-551x / 651x series
4. Alignment and Troubleshooting
● Error message
Tray1 cassette is pulled out. Insert it properly
● Error message
Input System Failure: #M1-4111. Call for service
4-109
Samsung Electronics