SC No.

Type

Error Name/Error Condition/Major Cause/Solution

SC541-01

A

Thermopile (Center) Disconnection

In Machine Condition A, after turning the fusing lamp on, the thermopile (center) (TH1) has detected the temperature of -50°C or below continuously for 0.1 second

Machine Condition A refers to any of the following conditions:

  • In Warm-up mode
  • At start-up and restart-up
  • Rotation after reload
  • Before/while/after printing
  • In Ready mode
  • In Panel Off mode
  • In Low Power mode
  • Thermopile disconnection
  • Thermistor disconnection
  • Connector error (disconnected, loose)
  1. Reconnect the connectors (main machine side, BICU side).
  2. Replace the thermopile (center) (TH1).
  3. Replace the harness between the fusing unit and the BICU.
  4. Replace the BICU (PCB10), or PSU (AC controller board) (PCB9).

SC541-02

A

Non-contact Thermistor (Center) Disconnection

In Machine Condition A, after turning the fusing lamp on, the non-contact thermistor (center) (S46) has detected the temperature of 36°C or higher continuously for 1 second.

Machine Condition A refers to any of the following conditions:

  • In Warm-up mode
  • At start-up and restart-up
  • Rotation after reload
  • Before/while/after printing
  • In Ready mode
  • In Panel Off mode
  • In Low Power mode
  • Thermopile disconnection
  • Thermistor disconnection
  • Connector error (disconnected, loose)
  1. Check the power supply voltage and reconnect the cable to the outlet.
  2. Replace the fusing sleeve thermostat (center)
  3. Replace the fusing unit.
  4. Replace the thermopile (center) (TH1).
  5. Replace the BICU (PCB10), or PSU (AC controller board) (PCB9)

SC541-03

A

Non-contact Thermistor (Center) short-circuit

In Machine Condition A, after turning the fusing lamp on, the non-contact thermistor (center) (S46) has detected the AD value of 8 or below continuously for 1 second.

Machine Condition A refers to any of the following conditions:

  • In Warm-up mode
  • At start-up and restart-up
  • Rotation after reload
  • Before/while/after printing
  • In Ready mode
  • In Panel Off mode
  • In Low Power mode
  • Thermopile disconnection
  • Thermistor disconnection
  • Connector error (disconnected, loose)
  1. Check the power supply voltage and reconnect the cable to the outlet.
  2. Replace the fusing sleeve thermostat (center)
  3. Replace the fusing unit.
  4. Replace the thermopile (center) (TH1).
  5. Replace the BICU (PCB10), or PSU (AC controller board) (PCB9)

SC No.

Type

Error Name/Error Condition/Major Cause/Solution

SC542-02

A

Thermopile (Center) does not reload

In Machine Condition B, after turning the fusing lamp (center) on, the thermopile (center) (TH1) has failed to reach 65°C in 10 seconds.

Machine Condition B refers to any of the following conditions:

  • In Warm-up mode
  • At start-up and restart-up

SC542-03

A

Thermopile (Center) does not reload

In Machine Condition B, after turning the fusing lamp (center) on, the thermopile (center) (TH1) has failed to reach the "permissible temperature for reloading" in 35 seconds.

Machine Condition B refers to any of the following conditions:

  • In Warm-up mode
  • At start-up and restart-up

SC542-05

D

Thermopile (Center) does not reload (Low Power)

In Machine Condition B, after turning the fusing lamp (center) on, the thermopile (center) (TH1) has failed to reach 65°C in 10 seconds.

Machine Condition B refers to any of the following conditions:

  • In Warm-up mode
  • At start-up and restart-up

SC542-06

D

Thermopile (Center) does not reload (Low Power)

In Machine Condition B, after turning the fusing lamp (center) on, the thermopile (center) (TH1) has failed to reach the "permissible temperature for reloading" in 35 seconds.

Machine Condition B refers to any of the following conditions:

  • In Warm-up mode
  • At start-up and restart-up

 

 

  • Thermopile lens dirt
  • Thermopile modification/float
  • After excessive temperature rise prevention unit operation
  1. Check the power supply voltage and reconnect the cable to the outlet.
  2. Replace the fusing sleeve thermostat (center)
  3. Replace the fusing unit.
  4. Replace the thermopile (center) (TH1).
  5. Replace the BICU (PCB10), or PSU (AC controller board) (PCB9)

SC No.

Type

Error Name/Error Condition/Major Cause/Solution

SC543-00

A

Thermopile (Center) high temperature detection (software)

The thermopile (center) (TH1) has detected the temperature of 240°C or higher continuously for 1 second.

  • Triac short-circuit
  •  IOB board defective
  •  BICU board defective
  1. Reconnect the harnesses between the fusing unit and BICU or the PSU (AC controller board).
  2. Replace the thermopile (center) (TH1).
  3. Replace the harnesses between the fusing unit and BICU or the PSU (AC controller board).
  4. Replace the BICU (PCB10).
  5. Replace the PSU (AC controller board) (PCB9).
  6. 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

  • Triac short-circuit
  •  IOB board defective
  •  BICU board defective
  1. Reconnect the harnesses between the fusing unit and BICU or the PSU (AC controller board).
  2. Replace the thermopile (center) (TH1).
  3. Replace the harnesses between the fusing unit and BICU or the PSU (AC controller board).
  4. Replace the BICU (PCB10).
  5. Replace the PSU (AC controller board) (PCB9).
  6. 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

  • Triac short-circuit
  • IOB board defective
  • BICU board defective
  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, BICU side).
  5. Remove the jammed paper between the thermopile and fusing unit.
  6. Clean or Replace the thermopile (center) (TH1).
  7. Replace the fusing unit.
  8. Inspect the pressure roller HP sensor (S26) with SP5-803-047.
  9. Replace the harness between the fusing unit and the BICU or the PSU (AC controller board).
  10. Replace the BICU (PCB10).
  11. Replace the PSU (AC controller board) (PCB9).

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 BICU or the PSU (AC controller board)
  • BICU defective
  • AC controller board defective
  • Thermistor modification/float
  • Fusing lamp disconnection
  • After excessive temperature rise prevention unit operation
  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) (TH1).
  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 BICU or the PSU (AC controller board).
  7. Replace the BICU (PCB10).
  8. Replace the PSU (AC controller board) (PCB9).

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 (PCB1).
  2. Replace the PSU (AC controller board) (PCB9).
  3. Replace the paper transport IOB (PCB1).

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) (PCB9).
  3. Replace the paper transport IOB (PCB1).
  4. Replace the harness between PSU (AC controller board) and paper transport IOB (PCB1).

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, infrastructure may have defects to be dealt with.
  2. Replace the PSU (AC controller board) (PCB9).
SC No.TypeError Name/Error Condition/Major Cause/Solution

SC549-02

D

Fusing Shield Operation Error

  

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

SC549-03

D

Fusing Shield Operation Error

  

During shield basic operation, shield motor does not stop even if 2 sec. elapsed from rotation start.

SC549-04

D

Fusing Shield Operation Error

  

During HP detection operation, HP detection fails 5 times consecutively.

SC549-05

C

Fusing Shield Operation Error

  

-

  

  • Fusing Shield Plate Position Sensor is loose, or disconnected.

  • Shield Drive Motor (M28) is disconnected.

  • Fusing Unit is damaged.

  1. Check the Shield Plate Position Sensor with SP5-803-097 (SSP). If there is no response, reconnect the Fusing Shield Plate Position Sensor harness.
  2. Reconnect the harness of the Shield Drive Motor (M28).
  3. Replace the Fusing Unit.

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