Pressure Roller Thermistor (Edge) Error (SC57*-**)

SC571-01

A

Pressure Roller Thermistor (Edge) Disconnection

SC571-05

D

Pressure Roller Thermistor (Edge) Disconnection (Low Power)

Below 0 degree C detected for 40 sec. continuously.

Detection period: 100 ms, detection counts: 10 times or more.

• Thermistor disconnection
• Connector disconnected
• Harness disconnection in the fusing unit
• Harness disconnection inside the main machine
• BCU defective
• Fusing lamp defective
• AC controller board defective

1. Check the power supply voltage and reconnect the cable to the outlet. (-05 only)
2. Reconnect the connectors (between the fusing unit and the BCU).
3. Replace the thermistor.
4. Replace the fusing unit.
5. Replace the harness between the fusing unit and the BCU or the PSU (AC controller board).
6. Replace the BCU.
7. Replace the fusing sleeve belt unit.
8. Replace the PSU (AC controller board).

SC572-04

A

Pressure Roller Thermistor (Edge) Does Not Reload

SC572-05

D

Pressure Roller Thermistor (Edge) Does Not Reload ( Low Power)

After starting continuous job with paper width of 257mm or more, does not reach 0 degrees C after 100 sec.

• Outside input voltage guarantee
• Thermistor dirt
• Thermistor deformed or not installed (or mounted) properly
• After excessive temperature rise prevention unit operation
• Fusing lamp disconnection
• Harness disconnection inside the main machine
• Thermopile defective
• BCU defective
• AC controller board defective

1. Check the power supply voltage and reconnect the cable to the outlet.
2. Clean or replace the thermistor.
3. Replace the fusing sleeve thermostat.
4. Replace the fusing sleeve belt unit.
5. Reconnect or replace the harness between the fusing unit and the BCU or the PSU (AC controller board).
6. Replace the thermopile (edge).
7. Replace the BCU.
8. Replace the PSU (AC controller board).

SC573-00

A

Pressure Roller Thermistor (Edge) High Temperature Detection (software)

Above 230 degrees C detected for 1 sec. continuously.

Detection period: 100ms, detection count: 10 times or more.

• Paper setting misdetection

• Incorrect paper position in the paper feed tray

• Jammed paper between the thermopile and fusing unit
• Thermopile lens dirt
• Thermopile deformed or not installed (or mounted) properly
• Harness disconnection inside the main machine
• Triac defective (short-circuit)
• BCU failure

• AC controller board failure

1. Check the paper settings.

2. Check the paper position in the paper feed tray.

3. Reconnect the connectors (between the fusing unit and the BCU).
4. Remove the jammed paper between the thermopile and fusing unit.
5. Clean or replace the thermopile (edge).
6. Replace the harness between the fusing unit and the BCU or the PSU (AC controller board).
7. Replace the BCU.
8. Replace the PSU (AC controller board).

If the problem cannot be solved after performing the above steps, replace the fusing unit.

SC574-00

A

Pressure Roller Thermistor (edge) High Temperature Detection (hardware)

Above 240 degrees C detected

• Paper setting misdetection

• Incorrect paper position in the paper feed tray

• Jammed paper between the thermopile and fusing unit
• Thermopile lens dirt
• Thermopile deformed or not installed (or mounted) properly
• Pressure roller HP sensor disconnected
• Harness disconnection inside the main machine
• Triac defective (short-circuit)
• BCU failure

• AC controller board failure

1. Check the paper settings.

2. Check the paper position in the paper feed tray.

3. Reconnect the connector.
4. Remove the jammed paper between the thermopile and fusing unit.
5. Clean or replace the thermopile (edge).
6. Inspect the pressure roller HP sensor with SP5-803-047.
7. Replace the harness between the fusing unit and the BCU or the PSU (AC controller board).
8. Replace the BCU.
9. Replace the PSU (AC controller board).

If the problem cannot be solved after performing the above steps, replace the fusing unit.