Ricoh G092 Service Manual page 107

SC Symptom
471 Belt tension unit cam error
Even though the belt
tension unit tries to return to
its home position several
times, the home position
sensor is not activated.
486 BK solenoid error
The BK solenoid cannot
drive the black PCU.
487 Solenoid error
Any of the following
solenoids has caused a
short circuit: changer
solenoid, paper feed
solenoid, toner supply
solenoid.
530 Fusing fan motor error
The fusing unit fan motor
does not operate.
531 PSU cooling fan error
The PSU cooling fan does
not operate.
532 Fusing unit sub-cooling fan (left) error
The fusing unit sub-cooling
fan does not operate.
SM
SERVICE CALL CONDITIONS
Possible Cause/Required Action
• Defective transfer belt unit
• Pin 3 (CN25 on engine control board) unable to
send signal
• Defective transfer belt tension unit
1. Replace the transfer belt unit.
2. Replace the engine control board.
3. Replace the transfer belt tension unit.
• 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
1. Connect the cable between the engine control
board (CN21) and BK solenoid correctly.
2. Replace the engine board.
3. Replace the drive unit.
• Solenoid drive transistor short-circuited
1. Replace the engine controller board.
2. Replace the defective solenoid.
• Voltage between pins 2 and 3 (CN9 on engine
control board) abnormal (not +24V)
• Defective fusing unit fan
1. Replace the engine control board.
2. Replace the fusing unit fan.
• Voltage between pins 1 and 2 (CN8 on engine
control board) abnormal (not +24V)
• Defective PSU cooling fan
1. Replace the engine control board.
2. Replace the PSU cooling fan.
• Voltage between pins 1 and 2 (CN9 on engine
control board) abnormal (not +24V)
• Defective sub-cooling fan
1. Replace the engine control board.
2. Replace the sub-cooling fan.
4-3 G081/G092