• Code: H2-4A20
• Display: Mailbox door is open. Close it
• Description: Mailbox Motors doesn’t work. Rear Door Opened, Micro Switch not assembled well or damaged, Harness Damaged. Main Board Damaged, door fl ag damaged.
• Remedy: 1. Check the Rear Door Closed fi rmly. 2. Check Mailbox Main Board Harness connection. 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, replace the mailbox main board. 6. If the same problem happens after checking 5, replace the mailbox harnesses.

• Code: H2-4A32
• Display: Too much paper in mailbox bin 1. Remove printed paper
• Description: Mailbox bin 1 Full message pops when papers on that bin are stacked fully or the full sensor detecting mechanism is out of order. Mailbox Full detecting sensor damaged, harness connection not well or damaged, Main Board damaged.
• Remedy: 1. Check the Bin’s Full Sensor Connection and Actuator’s operation. 2. Check Main Board Harness connection. 3 . If the same problem happens after checking 1-2, replace the mailbox main board. 4. If the same problem happens after checking 3, replace the mailbox harnesses.

• Code: H2-4A35
• Display: Too much paper in mailbox bin 2. Remove printed paper
• Description: Mailbox bin 2 Full message pops when papers on that bin are stacked fully or the full sensor detecting mechanism is out of order. Mailbox Full detecting sensor damaged, harness connection not well or damaged, Main Board damaged.
• Remedy: Manual ML-551x / 651x series 4-105 Samsung Electronics .. Code H2-4A35 .. Error message Too much paper in mailbox bin 2. Remove printed paper .. Symptom / Cause Mailbox bin 2 Full message pops when papers on that bin are stacked fully or the full sensor detecting mechanism is out of order. Mailbox Full detecting sensor damaged, harness connection not well or damaged, Main Board damaged. .. Troubleshooting method : 1. Check the Bin’s Full Sensor Connection and Actuator’s operation. 2. Check Main Board Harness connection. 3 . If the same problem happens after checking 1-2, replace the mailbox main board. 4. If the same problem happens after checking 3, replace the mailbox harnesses.

• Code: H2-4A38
• Display: Too much paper in mailbox bin 3. Remove printed paper
• Description: Mailbox bin 3 Full message pops when papers on that bin are stacked fully or the full sensor detecting mechanism is out of order. Mailbox Full detecting sensor damaged, harness connection not well or damaged, Main Board damaged.
• Remedy: 1. Check the Bin’s Full Sensor Connection and Actuator’s operation. 2. Check Main Board Harness connection. 3 . If the same problem happens after checking 1-2, replace the mailbox main board. 4. If the same problem happens after checking 3, replace the mailbox harnesses.

• Code: H2-4A3C
• Display: Too much paper in mailbox bin 4. Remove printed paper
• Description: Mailbox bin 4 Full message pops when papers on that bin are stacked fully or the full sensor detecting mechanism is out of order. Mailbox Full detecting sensor damaged, harness connection not well or damaged, Main Board damaged.
• Remedy: 1. Check the Bin’s Full Sensor Connection and Actuator’s operation.. 2. Check Main Board Harness connection. 3 . If the same problem happens after checking 1-2, replace the mailbox main board. 4. If the same problem happens after checking 3, replace the mailbox harnesses.

• Code: M1-1110
• Display: Paper Jam in Tray 1
• Description: The jammed paper has occurred in the tray1. 1. Pick up/ Forward/ Retard roller is contaminated or worn out. 2. There is some obstacles in the paper path
• Remedy: 1. Clear the jammed paper. If the problem persists, check the following. 2. Check if the pick up/ forward/ retard roller is contaminated or worn out. Clean or replace it if necessary. 3. Check if there is any obstacles or contamination in the paper path.

• Code: M1-1610
• Display: Paper Jam in MP tray
• Description: The jammed paper has occurred in the MP tray. 1. MP Pick up/ Forward/ Retard roller is contaminated or worn out. 2. There is some obstacles in the paper path.
• Remedy: 1. Clear the jammed paper. If the problem persists, check the following. 2. Check if the MP pick up/ forward/ retard roller is contaminated or worn out. Clean or replace it if necessary. 3. Check if there is any obstacles or contamination in the paper path.

• Code: M1-3122
• Display: Tray1 cassette is pulled out. Insert it properly
• Description: Tray1 is not installed properly. 1. Tray1 is not installed. 2. Paper Size Sensor is defective. 3. Harness connection error.
• Remedy: 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.