SC No.

Type

Error Name/Error Condition/Major Cause/Solution

SC540-00

D

Fusing Motor: Lock

  

Motor status is observed at 100 ms intervals during motor ON, and the unlock status is detected at least 20 times.

  
  • Motor defective
  • Connector disconnected
  • Harness broken
  • IOB defective
  • Unit torque increased
  
  • Replace the fusing motor.
  • Reconnect the connector.
  • Replace the harness.
  • Replace the paper transport IOB.

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
  • Harnesses between the drawer and the PCBs on machine are disconnected.
  • BCU board is broken.
  
  1. Reconnect the connector between the fusing unit and BCU.
  2. Replace the thermopile (Center).
  3. Replace the harness between the fusing unit and 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: 100 ms, detection frequency: 10 times or more.

  
  • Non-contact thermistor disconnection
  • Connector disconnected
  • Harness disconnection in the fusing unit
  • Harness disconnection inside the main machine
  • 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 or the PSU (AC controller board).

  5. Replace the BCU.

SC541-03

A

Non-contact Thermistor (Center) short-circuit

  

AD value: Below 8 is detected for 1 sec. continuously.

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

  
  • Non-contact thermistor short-circuit
  • Connector disconnected
  • Harness disconnection in the fusing unit
  • Harness disconnection inside the main machine
  • 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 or the PSU (AC controller board).
  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.

SC542-03

A

Thermopile (Center) does not reload

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

SC542-05

D

Thermopile (Center) does not reload (Low Power)

  65 degrees C not reached after fusing lamp 1 ON for 10 sec.
SC542-06DThermopile (Center) does not reload (Low Power)
  

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

  
  • Outside input voltage guarantee
  • Jammed paper between the thermopile and fusing unit
  • Thermopile lens dirt
  • Thermopile deformed or not installed (or mounted) properly
  • After excessive temperature rise prevention unit operation
  • Fusing lamp disconnection
  • Harness disconnection inside the main machine
  • 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 100ms, detection count: 10 times or more.

  
  • Fusing sleeve belt defective

  • Paper setting misdetection

  • Improper paper position in the paper feed tray

  • Gear abrasion

  • Thermopile failure

  • Harness disconnection inside the main machine

  • 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 (between the fusing unit and the BCU).
  5. Inspect or replace the gears inside the main machine or fusing unit.
  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

  • Improper paper position in the paper feed tray

  • Gear abrasion

  • Pressure roller HP sensor disconnected

  • Thermopile failure

  • Harness disconnection inside the main machine
  • 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 (between the fusing unit and the BCU).
  5. Inspect or replace the gears inside the main machine or fusing unit.
  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

  • Improper 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. 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 (between the fusing unit and the BCU).
  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 deformed or not installed (or mounted) properly
  • After excessive temperature rise prevention unit operation
  • Fusing lamp disconnection
  • 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

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 (24VS) 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.

SC547-03

D

Zero cross error (low-frequency error)

  

Mains power supply frequency is determined to be 44 Hz or lower.

  

Frequency instability of mains power supply

  
  1. Check that the mains power supply frequency is higher than 44 Hz. If it is equal to or lower than 44 Hz, the mains power supply infrastructure may have defects to be dealt with.
  2. Replace the PSU (AC Controller Board).

SC No.

Type

Error Name/Error Condition/Major Cause/Solution

SC549-02

D

Fusing Shield Operation Error

  

In normal fusing shield operation, the fusing shield motor does not stop even if 2 sec. elapsed from rotation start.

SC549-03

D

Fusing Shield Operation Error

  

In normal fusing shield operation, the fusing shield motor does not stop even if 2 sec. elapsed from rotation start.

SC549-04

D

Fusing Shield Operation Error

  

During HP detection operation, the shield sensors detect "High" for 2 sec. continuously.

SC549-05

C

Fusing Shield Operation Error

  

When the fusing shield motor has stopped, if the feeler is at "High", it is reported by an SC code.

However, this excludes cases whereby the fusing shield plate is HP or the pulse at the stop position is less than 100.

  
  • Fusing shield position sensor unfastened
  • Fusing shield position sensor disconnected
  • Fusing shield drive motor disconnected
  • Fusing unit defective

Inspect the fusing shield position sensor with SP5-803-097. If there is no response from the sensor, perform steps 1 and 2.

  1. Reattach the fusing shield position sensor.
  2. Check the connection of the fusing shield position sensor.
  3. Check the connection of the fusing shield driver motor.
  4. Replace the fusing unit.

Also, refer to When SC549 (Shield Operation Error Detection) is Displayed