SC4xx: Image Processing

SC442-00

D

Image transfer belt contact motor error

ITB contact HP sensor cannot detect the sensor feeler condition within a specified time even when the ITB contact motor rotates.

• Contact/Release: 5 sec.
• Homing: 10 sec.
• Sampling interval: 0.01 sec.

• Broken harness or defective connectors
• Disconnected connector of ITB contact sensor or motor
• Defective ITB contact motor
• Image transfer belt unit not installed

1. Set the ITB unit firmly.
2. Replace the ITB unit.
3. Clean the ITB contact HP sensor.
4. Check the harnesses.
5. Replace the ITB contact HP sensor.
6. Replace the ITB contact motor.

SC491-00

C

High voltage power: Charge/Development bias output error

Incorrect PWM signal is detected 10 times for consecutive 0.02 sec.

Hardware related causes:

• Contact failure
• Loose connector (Controller side)
• Grounding, open-circuit in the high voltage route
• Arc discharge due to lack of space
• Shorted harness (Controller side)
• BiCU malfunction (Signal error)
• Power pack (Development/Transfer) failure

Load related causes:

• Short-circuit
• Arc discharge due to lack of space
• Deteriorated drum (overcurrent)
• Condensated drum (overcurrent)
• Incorrect gap between drum and charge roller (incorrect PCDU)
• PCDU not installed firmly

First, cycle the main power off/on to check if this SC occurs again.

If this SC reoccurs, do the following:

1. Remove and install the PCDU again to make sure that the PCDU is firmly set. Cycle the main power off/on to check if this SC occurs again. If the SC occurs again, go to the next step.
2. Check if there are scratches on the drum surface. If you can see the internal element of the drum (plain pipe) on the surface, go to the next step, because too much electricity can flow at this point, which caused the SC.
3. Replace the PCDU and cycle the main power off/on to check if this SC occurs again.
4. Reconnect the connector (CN561) on the BiCU and cycle the main power off/on. Be careful not to bend the connector pins when reconnecting. If the SC occurs again, go to the next step.
5. Reconnect the connector (CN801) on the power pack (charge/development) and cycle the main power off/on. If the SC occurs again, go to the next step.
6. Remove and install the power pack (charge/development) again and cycle the main power off/on. Check if the spring near the power pack terminal bends and comes in contact with other contacts. Cycle the main power off/on to check if this SC occurs again.
7. Replace the power pack (charge/development) and cycle the main power off/on to check if the SC occurs again.
8. Replace the BiCU and cycle the main power off/on to check if the SC occurs again.
9. Make sure that the harnesses on the power pack (charge/development) are not shorted. If not good, replace the harness and cycle the main power off/on.

SC492-00

C

High voltage power: Transfer bias output error

Incorrect PWM signal is detected for 0.2 sec.

Hardware related causes:

• Contact failure
• Loose connector (Controller side)
• Grounding, open-circuit in the high voltage route
• Shorted harness (Controller side)
• BiCU malfunction (Signal error)
• Power pack (Transfer) failure

Load related causes:

• Increased impedance in the paper transfer roller
• Increased impedance in the ITB
• Open-circuit
• Transfer unit not installed firmly

• This is a logging SC (No action required).

SC497-00

C

Image creation temperature sensor error

The thermistor output of the temperature sensor is not within the prescribed range (more than 0.5 V to less than 3.0 V).

• Damaged or loose connector
• Defective Image creation temperature sensor

Cycle the main power off/on to check if this SC occurs again.

If this SC reoccurs, do the following:

1. Reconnect all the related connectors, and cycle the main power off/on to check if the SC reoccurs.
2. Replace the image creation temperature sensor, and cycle the main power off/on to check if the SC reoccurs.

SC498-00

C

Temperature/humidity sensor error

• The thermistor output of the temperature sensor is not within the prescribed range (more than 3.0V to less than 0.5V.
• The thermistor output of the humidity sensor is not within the prescribed range (2.4V or more).

• Damaged or loose connector
• Defective temperature/humidity sensor

Cycle the main power off/on to check if this SC occurs again.

If this SC reoccurs, do the following:

1. Reconnect all the related connectors, and cycle the main power off/on to check if the SC reoccurs.
2. Replace the temperature/humidity sensor, and cycle the main power off/on to check if the SC reoccurs.