SC No.

Type

Error Name/Error Condition/Major Cause/Solution

SC541-01

A

Thermopile (Center) Disconnection

Below -50 degrees C (or below CB) is detected for 0.1 sec continuously.

 Thermopile disconnection

 Connector disconnected

 Harness disconnection between the fusing unit and the BCU

 BCU defective

1. Reconnect the connectors (main machine side, BCU side).

2. Replace the thermopile (center).

3. Replace the harness between the fusing unit and the BCU.

4. Replace the BCU.

SC541-02

A

Non-contact Thermistor (Center) Disconnection

Above 3F6 is detected for 1 sec. continuously (NC sensor center: detection & compensation NC sensor edge: detection & compensation).

Detection period: 0.1 sec, detection frequency: 10 times or more.

 Non-contact thermistor disconnection

 Connector disconnected

 Harness disconnection in the fusing unit

 Harness disconnection between the fusing unit and the BCU

 BCU defective

1. Reconnect the connectors (between the fusing unit and the BCU).

2. Replace the non-contact thermistor with the harness.

3. Replace the fusing unit.

4. Replace the harness between the fusing unit and the BCU.

5. Replace the BCU.

SC No.

Type

Error Name/Error Condition/Major Cause/Solution

SC541-03

A

Non-contact Thermistor (Center) short-circuit

Below AD value: 8 is detected for 1 sec. continuously. Detection period: 0.1 sec, detection frequency: 10 times or more.

 Non-contact thermistor short-circuit

 Connector disconnected

 Harness disconnection in the fusing unit

 Harness disconnection between the fusing unit and the BCU

 BCU defective

1. Reconnect the connectors (between the fusing unit and the BCU).

2. Replace the non-contact thermistor with the harness.

3. Replace the fusing unit.

4. Replace the harness between the fusing unit and the BCU.

5. Replace the BCU.

SC No.

Type

Error Name/Error Condition/Major Cause/Solution

SC542-02

A

Thermopile (Center) does not reload

65 degrees C not reached after fusing lamp 1 ON for 10 sec continuously.

SC542-03

A

Thermopile (Center) does not reload

Heating central reload permission temperature not reached after fusing lamp 1 ON for 35 sec continuously.

SC542-05

D

Thermopile (Center) does not reload (Low Power)

65 degrees C not reached after fusing lamp 1 ON for 10 sec continuously.

SC542-06

D

Thermopile (Center) does not reload (Low Power)

Heating central reload permission temperature not reached after fusing lamp 1 ON for 35 sec continuously.

SC No.

Type

Error Name/Error Condition/Major Cause/Solution

 Outside input voltage guarantee

 Jammed paper between the thermopile and fusing unit

 Thermopile lens dirt

 Thermopile modification/float

 After excessive temperature rise prevention unit operation

 Fusing lamp disconnection

 Harness disconnection between the fusing unit and the BCU or the PSU (AC controller board)

 BCU defective

 AC controller board defective

1. Check the power supply voltage and reconnect the cable to the outlet.

2. Remove the jammed paper between the thermopile and fusing unit.

3. Clean or replace the thermopile (center).

4. Replace the fusing sleeve thermostat

5. Replace the fusing sleeve belt unit.

6. Reconnect or 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).

SC No.

Type

Error Name/Error Condition/Major Cause/Solution

SC543-00

A

Thermopile (Center) high temperature detection (software)

Above 240 degrees C detected for 1 sec continuously. Detection period: 0.1 sec, detection count: 10 times or more.

 Fusing sleeve belt defective

 Paper setting misdetection

 Incorrect paper position in the paper feed tray

 Gear abrasion

 Thermopile failure

 Harness disconnection between the fusing unit and the BCU or the PSU (AC controller board)

 Triac defective (short-circuit)

 BCU failure

 AC controller board failure

1. Inspect the fusing sleeve belt unit, and replace if damaged.

2. Check the paper settings.

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

4. Reconnect the connectors (main machine side, BCU side).

5. Inspect or replace the gears in the fusing unit or main machine.

6. Replace the thermopile (center).

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.

SC No.

Type

Error Name/Error Condition/Major Cause/Solution

SC544-01

A

Thermopile (Center) high temperature detection (hardware)

In the event of an error

 Fusing sleeve belt defective

 Paper setting misdetection

 Incorrect paper position in the paper feed tray

 Gear abrasion

 Pressure roller HP sensor disconnected

 Thermopile failure

 Harness disconnection between the fusing unit and the BCU or the PSU (AC controller board)

 Triac defective (short-circuit)

 BCU failure

 AC controller board failure

1. Inspect the fusing sleeve belt unit, and replace if damaged.

2. Check the paper settings.

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

4. Reconnect the connectors (main machine side, BCU side).

5. Inspect or replace the gears in the fusing unit or main machine.

6. Inspect the pressure roller HP sensor with SP5-803-047.

7. Replace the thermopile (center).

8. Replace the harness between the fusing unit and the BCU or the PSU (AC controller board).

9. Replace the BCU.

10. Replace the PSU (AC controller board).

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

SC No.

Type

Error Name/Error Condition/Major Cause/Solution

SC544-02

A

Non-contact Thermistor (Center) high temperature detection (hardware)

In the event of an error

 Fusing sleeve belt defective

 Paper setting misdetection

 Incorrect paper position in the paper feed tray

 Jammed paper between the thermopile and fusing unit

 Thermopile lens dirt

 Thermopile modification/float

 Pressure roller HP sensor disconnected

 Harness disconnection between the fusing unit and the BCU or the PSU (AC controller board)

 Triac defective (short-circuit)

 BCU failure

 AC controller board failure

1. Inspect the fusing sleeve belt unit, and replace if damaged.

2. Check the paper settings.

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

4. Reconnect the connectors (main machine side, BCU side).

5. Remove the jammed paper between the thermopile and fusing unit.

6. Clean or replace the thermopile (center).

7. Replace the fusing unit.

8. Inspect the pressure roller HP sensor with SP5-803-047.

9. Replace the harness between the fusing unit and the BCU or the PSU (AC controller board).

10. Replace the BCU.

11. Replace the PSU (AC controller board).

SC No.

Type

Error Name/Error Condition/Major Cause/Solution

SC545-01

A

Fusing Central Lamp Continuously Heat

SC545-05

D

Fusing Central Lamp Continuously Heat (Low Power)

After waiting for full power for more than 5 sec continuously.

 Definition of fusing lamp full power

Continuously heating rate set point (maximum heating rate)

 Measurement start point

After reload (after fusing lamp extinguished, after rotation complete) below the standby temperature (target temperature), measurement starts after a fusing lamp heat-up request is issued.

 Measurement stop condition

Rotation started due to a print signal during measurement or other.

 Maximum heat-up duty (SP interlinked value) 0% is excluded.

 Outside input voltage guarantee

 Jammed paper between the thermopile and fusing unit

 Thermopile lens dirt

 Thermopile modification/float

 After excessive temperature rise prevention unit operation

 Fusing lamp disconnection

 Harness disconnection between the fusing unit and the BCU or the PSU (AC controller board)

 BCU defective

 AC controller board defective

SC No.

Type

Error Name/Error Condition/Major Cause/Solution

1. Check the power supply voltage and reconnect the cable to the outlet.

2. Remove the jammed paper between the thermopile and fusing unit.

3. Clean or replace the thermopile (center).

4. Replace the fusing sleeve thermostat.

5. Replace the fusing sleeve belt unit.

6. Reconnect or 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).

SC No.

Type

Error Name/Error Condition/Major Cause/Solution

SC547-01

D

Zero cross error (relay-contact soldering)

Zero-cross signal is detected while the fusing relay is OFF.

 Fusing relay defective (contact soldering)

 Fusing relay drive circuit error

1. Reconnect the connectors between PSU (AC controller board) and paper transport IOB.

2. Replace the PSU (AC controller board).

3. Replace the paper transport IOB.

SC547-02

D

Zero cross error (relay contact error)

Zero-cross signal is not detected while the fusing relay is ON.

 Fusing relay damage (contact open)

 Fusing relay drive circuit error

 PSU fuse (24 VS) blowout

1. Reconnect the connectors between PSU (AC controller board) and Paper transport IOB.

2. Replace the PSU (AC controller board).

3. Replace the paper transport IOB.

4. Replace the harness between PSU (AC controller board) and paper transport IOB.