SC500 (Paper Feed and Fusing)

SC508-00

B

By-pass bottom plate operation error

The signal from the by-pass bottom plate HP Sensor has not changed (that is, the signal has not changed from ON to OFF or vice versa) for 4 seconds or more after the start of reverse Paper Feed Unit rotation.

If the error is detected three times in succession, the appropriate SC number is displayed on the operation panel unit.

• By-pass bottom plate HP sensor connector disconnected or other error

• By-pass bottom plate HP sensor feeler stuck or other error

• Check and replace the by-pass bottom plate HP sensor connector connection.

• Replace the by-pass bottom plate HP sensor feeler.

• Replace the harness.

• Replace the engine board.

SC520-00

D

Main motor error

When the main motor is driven, the lock (state of rotation) signal is checked every 100 milliseconds. If the machine detects the lock signal in the High status 20 times in succession, it reports this error.

• The main motor incurs too much load from a defective unit.

• The main motor is defective.

• Turn the main power off/on.

• Replace the defective unit or the motor.

SC525-01

D

Tray 2 paper feed motor error

When the machine has an optional tray, the lock signal from the paper feed motor in the tray 2 is received.

• Paper feed motor in the tray defective

• Connector broken or disconnected

• Board failure

• Mechanical, excessive load against tray driving

• Replace the paper feed motor of the tray.

• Replace the harness.

• Replace the board.

• Replace the tray

SC525-02

D

Tray 2 paper feed motor error

When the machine has two optional trays, the lock signal from the paper feed motor in the tray 2 is received.

• Paper feed motor in the tray defective

• Connector broken or disconnected

• Board failure

• Mechanical, excessive load against tray driving

• Replace the paper feed motor of the tray.

• Replace the harness.

• Replace the board.

• Replace the tray.

SC525-03

D

Tray 2 paper feed motor error

When the machine has three optional trays, the lock signal from the paper feed motor in the tray 2 is received.

• Paper feed motor in the tray defective

• Connector broken or disconnected

• Board failure

• Mechanical, excessive load against tray driving

• Replace the paper feed motor of the tray.

• Replace the harness.

• Replace the board.

• Replace the tray.

SC526-01

D

Tray 3 paper feed motor error

When the machine has two optional trays, the lock signal from the paper feed motor in the tray 3 is received.

• Paper feed motor in the tray defective

• Connector broken or disconnected

• Board failure

• Mechanical, excessive load against tray driving

• Replace the paper feed motor of the tray.

• Replace the harness.

• Replace the board.

• Replace the tray.

SC526-02

D

Tray 3 paper feed motor error

When the machine has three optional trays, the lock signal from the paper feed motor in the tray 3 is received.

• Paper feed motor in the tray defective

• Connector broken or disconnected

• Board failure

• Mechanical, excessive load against tray driving

• Replace the paper feed motor of the tray.

• Replace the harness.

• Replace the board.

• Replace the tray.

SC527-01

D

Tray 4 paper feed motor error

When the machine has three optional trays, the lock signal from the paper feed motor in the tray 4 is received.

• Paper feed motor in the tray defective

• Connector broken or disconnected

• Board failure

• Mechanical, excessive load against tray driving

• Replace the main motor of the tray.

• Replace the harness.

• Replace the board.

• Replace the tray.

SC531-00

D

PCDU Cooling fan error

The fan motor lock (rotating state) signal is sampled at 100 ms intervals and the machine fails to receive the lock signal 50 times in succession.

• Failed fan motor

• Disconnected connector

• Replace the fan motor.

• Check the connector.

• Replace the harness.

• Replace the engine board.

SC532-00

D

PSU Cooling fan error

The fan motor lock (rotating state) signal is sampled at 100 ms intervals and the machine fails to receive the lock signal 50 times in succession.

• Failed fan motor

• Disconnected connector

• Replace the fan motor.

• Check the connector.

• Replace the harness.

• Replace the engine board.

SC541-00

A

Broken fusing (Center) thermistor wire

The condition whereby the temperature is -20°C or less for 5 seconds has been detected 10 times or more.

• Broken thermistor wire

• Bad connector contact

Clear the SP: fusing SC.

SC542-01

A

Fusing lamp (Center) thermistor not reloaded 1

The heater thermistor has increased by less than 2.0 degrees in 1.5 seconds 5 times in a row.

• Deformed or floating thermistor

• Input voltage out of range

Clear the SP: fusing SC.

SC542-02

A

Fusing lamp (Center) thermistor not reloaded 2

The heater (Center) thermistor does not reach the reload temperature 50 seconds after the start of motor rotation.

• Fusing lamp Disconnected

• The over temperature prevention mechanism started working

Clear the SP: fusing SC.

SC543-00

A

Fusing (Center) thermopile high-temperature detected (software)

The temperature is detected to stay at 245°C or higher for one second.

• Shorted triac

• Failed the engine board

Clear the SP: fusing SC.

SC544-00

A

Fusing (Center) thermopile high-temperature detected (hardware)

The hardware high-temperature error Sensor flag is detected.

• Damaged triac (shorted)

• Failed the engine board

• Failed fusing thermistor

• Abnormal fusing control software behavior

• Clear the SP: fusing SC.

• Replace PSU when triac is blown.

• Replace engine board and/or fusing thermistor.

SC545-00

A

Fusing (Center) heater stay ON

The thermistor (center) has not detected the target temperature, even after the fusing heater stays ON for more than 30 seconds after reloading.

• Deformed or floating thermistor

• Broken fusing lamp wire

• The overtemperature prevention mechanism started working.

Clear the SP: fusing SC.

SC547-01

D

Zero-crossing error (adhered relay contact)

When the fusing relay is in an OFF state, a "zero-crossing interrupt request" occurs in 50 ms.

Damaged fusing relay (adhered contact)

Failed fusing relay driving circuit

• Turn the main power off/on.

• Replace the PSU when fusing relay is broken.

• Check the connection between PSU – engine board.

• Replace the board and/or harness

SC547-02

D

Zero-crossing error (bad relay contact)

If a "zero-crossing interrupt request" does not occur when the fusing relay is in an ON state, an error results.

• Damaged fusing relay (open contact)

• Failed fusing relay drive circuit

• PSU fuse (24VS) blown

• Turn the main power off/on.

• Replace the PSU when fusing relay is broken.

• Check the connection between PSU – engine board.

• Replace the board and/or harness.

• Replace the PSU fuse (24VS) if it is blown

SC547-03

D

Zero-crossing error (low frequency error)

The number of zero-crossing interrupts does not reach a certain value in 500 ms.

The frequency of the commercial power supply line is unstable.

• Turn the main power off/on.

• Check the connection of commercial power supply line

• Check the connection between PSU – engine board.

• Replace the board and/or harness

SC551-00

A

Thermistor broken (Edge)

While a fusing heater works, temperatures of -20°C or less during a consecutive 9 seconds are detected more than 10 times.

• Thermistor broken

• Connector contact failure

Clear the SP: fusing SC

SC553-00

A

Fusing (Edge) thermistor high-temperature detected (software)

While a fusing heater works, temperatures of 255°C or more are detected during 1 second.

Resistor failure: Thermistor (Center)

Clear the SP: fusing SC

SC554-00

A

Fusing (Edge) thermistor high-temperature detected (Hardware)

Temperatures of 257°C or more are detected.

• Damaged triac (shorted)

• Failed engine control board

• Failed fusing thermopile

• Failed fusing thermistor

• Abnormal fusing control software behavior

• The PWM signal is continuously supplied from the IH inverter (due to a software or temperature Sensor error).

Clear the SP: fusing SC.

Replace PSU when triac is blown.

Replace engine board and/or fusing thermistor.

SC557-00

C

Zero-crossing frequency exceeded

The number of zero-crossing interrupts exceeds a certain value in 500 ms.

The frequency of the commercial power supply line is unstable or noise occurs.

None

SC559-00

A

Fusing jam detected 3 times in succession

Fusing jam is detected three times in succession.

Paper is wrapped around the fusing roller.

Clear the SP: fusing SC.