Description: Drum surface potential sensor problem 2 Drum surface potential sensor output voltage is 4.5 V or less when MC REM signal is turn on. (except during stepping control)
Causes: Defective drum surface potential sensor.
Remedy: Replace the drum surface potential sensor.
Code: C5600
Description: Drum surface potential problem 1 • Maximizing the grid output cannot set the potential.
Causes: Deteriorated main charger. Grid or main charger shield is dirty. Defective high voltage transformer PCB. Defective engine PCB.
Remedy: Check the main charger wire and replace it if necessary. Clean the grid or main charger shield if necessary. Replace the high voltage transformer PCB and check for correct operation. Replace the engine PCB and check for correct operation.
Code: C5610
Description: Drum surface potential problem 2 • Minimizing the grid output cannot set the potential.
Causes: Defective high voltage transformer PCB.
Remedy: Replace the high voltage transformer PCB and check for correct operation.
Code: C6000
Description: Broken fixing heater wire • The fixing temperature does not increase for 40 s after the fixing heaters have been turned on for warming up. • The fixing temperature remains below 50C/122F for 10 s continuously after the fixing heaters have been turned on during stabilization.
Causes: Poor contact in the fixing unit thermistor connector terminals. Fixing unit thermistor installed incorrectly. Fixing unit thermostat triggered. Fixing heater M and S installed incorrectly. Broken fixing heater M and S wire.
Remedy: Check the connection of connector CN25 on the engine PCB and the continuity across the connector terminals. Repair or replace if necessary. Check and reinstall if necessary. Check for continuity. If none, replace the fixing unit thermostat. Check and reinstall if necessary. Check for continuity. If none, replace the fixing heater M and S.
Code: C6020
Description: Abnormally high fixing unit thermistor temperature • The fixing temperature exceeds 220C/446 F for 10 s. • The fixing unit temperature detection circuit on the engine PCB detects and abnormally high temperature.
Causes: Shorted fixing unit thermistor. Broken fixing heater control circuit on the power source PCB.
Remedy: Measure the resistance. If it is 0 Ω, replace the fixing unit thermistor. Replace the power source PCB and check for correct operation.
Code: C6030
Description: Broken fixing unit thermistor • The fixing temperature remains at 0C/32F for 30 s continuously when the fixing heater is on.
Causes: Poor contact in the fixing unit thermistor connector terminals. Broken fixing unit thermistor.
Remedy: Check the connection of connector CN25 on the engine PCB and the continuity across the connector terminals. Repair or replace if necessary. Check and reinstall if necessary.