Description: BK solenoid error The BK solenoid cannot drive the black PCU.
Causes: • Defective connection between engine control board (CN21) and BK solenoid • Pin 1 (CN21 on engine control board) unable to send solenoid control signal • Defective drive unit
Remedy: 1. Connect the cable between the engine control board (CN21) and BK solenoid correctly. 2. Replace the engine board. 3. Replace the drive unit.
Code: 487
Description: Solenoid error Any of the following solenoids has caused a short circuit: changer solenoid, paper feed solenoid, toner supply solenoid.
Remedy: 1. Replace the engine controller board. 2. Replace the defective solenoid.
Code: 530
Description: Fusing fan motor error The fusing unit fan motor does not operate.
Causes: • Voltage between pins 2 and 3 (CN9 on engine control board) abnormal (not +24V) • Defective fusing unit fan
Remedy: 1. Replace the engine control board. 2. Replace the fusing unit fan.
Code: 531
Description: PSU cooling fan error The PSU cooling fan does not operate.
Causes: • Voltage between pins 1 and 2 (CN8 on engine control board) abnormal (not +24V) • Defective PSU cooling fan
Remedy: 1. Replace the engine control board. 2. Replace the PSU cooling fan.
Code: 532
Description: Fusing unit sub-cooling fan (left) error The fusing unit sub-cooling fan does not operate.
Causes: • Voltage between pins 1 and 2 (CN9 on engine control board) abnormal (not +24V) • Defective sub-cooling fan
Remedy: 1. Replace the engine control board. 2. Replace the sub-cooling fan.
Code: 543
Description: Heating belt overheat The temperature of the heating belt is out of the normal range.
Causes: • Pin 1 (IC6) unable to turns to lower level • Defective IH power supply board • Thermistor short-circuited • Defective cable connection between CN15 and thermistor
Remedy: 1. Replace the control board. 2. Replace the IH power supply board. 3. Replace the fusing unit. 4. Connect the cable between CN15 and the thermistor correctly.