• Code: C950
• Description: Circuit related service call. Error for distinction between engine firmware and MAIN board
• Causes: MAIN board
• Remedy: MAIN board Check that the wrong board is not installed, if it is wrong, replace it. Engine firmware Check that the model of the machine is correct, if it is wrong, download the data again.

• Code: C970
• Description: Process related service call High-voltage transformer abnormality: Leakage of the main charger is detected.
• Causes:
• Remedy: 1. Is the main charger installed securely? 2. Check if the spring of high-voltage supply contact point is deformed. 3. Check if the needle electrode is broken or the main charger grid is deformed. 4. Check if any foreign matters is on the needle electrode or the main charger grid. 5. Check if the transfer roller and the separation needle are installed securely. 6. Check if the transfer roller or the separation needle is removed. 7. Check if there is any foreign matter attached on the transfer roller or the separation needle.

• Code: CA10
• Description: Laser optical unit related service call. Polygonal motor abnormality: The polygonal motor is not rotating normally.
• Causes: MAIN board Laser optical unit
• Remedy: dure Check item Result Measure Next Step 1 Is the polygonal motor rotating? Yes 1. Check if the conductor pattern on the MAIN board is short circuited or open circuited. 2. Replace the MAIN board. 3. Replace the laser optical unit. No 1. Check if the connector of the harness is disconnected between MAIN board (CN32) and the laser optical unit. Reconnect it securely if so. Even if the connector is not apparently disconnected, it may be connected loosely. Therefore check carefully that it is secure. 2. Check if the harness is open circuited and the connector pin is disconnected. 3. Check if the conductor pattern on the MAIN board is short circuited or open circuited. 4. Replace the laser optical unit. 5. Replace the MAIN board.

• Code: CA20
• Description: Laser optical unit related service call. H-Sync detection error: H-Sync detection PC board cannot detect laser beams.
• Causes: MAIN board Laser optical unit
• Remedy: 1 Are the harness open circuited and the connectors disconnected between the MAIN board (CN33) and the laser optical unit? Yes 1. Even if the connector is not apparently disconnected, it may be connected loosely. Therefore check carefully that it is secure. No 1. Replace the MAIN board. 2. Replace the laser optical unit

• Code: CE50
• Description: Process related service call. Temperature/humidity sensor abnormality: The output value of this sensor is out of a specified range
• Causes: Temperature/humidity sensor MAIN board
• Remedy: Is the connector CN24 on the MAIN board or the connector of the temperature/humidity sensor disconnected? Is the harness between the MAIN board and the temperature/ humidity sensor disconnected? Yes 1. Connect the connector securely. Replace the harness. No 1. Replace the temperature/humidity sensor. 2. Replace the MAIN board.

• Code: CE90
• Description: Process related service call. Drum thermistor abnormality: The output value of the drum thermistor-K is out of a specified range.
• Causes: Drum thermistor MAIN board
• Remedy: MAIN board 1. Is the connector CN24 on the MAIN board, or the connector of the drum thermistor disconnected?

• Code: E010
• Description: Paper exit jam. Jam not reaching the exit sensor: The paper which has passed through the fuser unit does not reach the exit sensor.
• Causes: Exit sensor MAIN board Registration roller clutch Registration roller
• Remedy: dure Check item Result Measure Next Step 1 Open the right cover. Is there any paper on the transport path? Yes Remove the paper. No 2 2 Is the exit sensor working? (Perform the input check in the test mode: 03-[A]/ [B]) Yes 3 No • Check if the connector of the exit sensor is disconnected. • Check if the connector CN10 on the MAIN board is disconnected. • Check if the connector pins are disconnected and the harnesses are open circuited. • Check if the conductor pattern on the MAIN board is short circuited or open circuited. • Replace the exit sensor • Replace the MAIN board 3 Is the registration roller clutch working? (Perform the output check in the test mode: 03-108/ 158) Yes 4 No • Check if the connector of the registration roller clutch is disconnected. • Check if the connector CN22 on the MAIN board is disconnected. • Check if the connector pins are disconnected and the harnesses are open circuited. • Check if the conductor pattern on the MAIN board is short circuited or open circuited. • Replace the registration roller clutch. • Replace the MAIN board. 4 Registration roller • Check the registration roller. Replace it if it is worn out.

• Code: E020
• Description: Paper exit jam. Stop jam at the exit sensor: The trailing edge of the paper does not pass the exit sensor after its leading edge has reached this sensor.
• Causes: Exit sensor MAIN board Registration roller clutch Registration roller
• Remedy: dure Check item Result Measure Next Step 1 Open the right cover. Is there any paper on the transport path? Yes Remove the paper. No 2 2 Is the exit sensor working? (Perform the input check in the test mode: 03-[A]/ [B]) Yes 3 No • Check if the connector of the exit sensor is disconnected. • Check if the connector CN10 on the MAIN board is disconnected. • Check if the connector pins are disconnected and the harnesses are open circuited. • Check if the conductor pattern on the MAIN board is short circuited or open circuited. • Replace the exit sensor • Replace the MAIN board 3 Is the registration roller clutch working? (Perform the output check in the test mode: 03-108/ 158) Yes 4 No • Check if the connector of the registration roller clutch is disconnected. • Check if the connector CN22 on the MAIN board is disconnected. • Check if the connector pins are disconnected and the harnesses are open circuited. • Check if the conductor pattern on the MAIN board is short circuited or open circuited. • Replace the registration roller clutch. • Replace the MAIN board. 4 Registration roller • Check the registration roller. Replace it if it is worn out.