Service manual

T- 3 8
(3) C0042: Fusing Unit Cooling Fan Motor’s failure to turn
C0042
Relevant Electrical Parts
Fusing Unit Cooling Fan Motor (M23) Power Supply Board (PWB-C)
Step Check Result Action
1 Fusing Unit Cooling Fan Motor rotation: the
voltage across PJ13C-1 on Power Supply
Board and GND is DC24V (during high-speed
rotation) and DC16V (during low-speed rota-
tion) after the malfunction has been reset.
NO Change Power Supply
Board.
2 Fusing Unit Cooling Fan Motor rotation: the
voltage across PJ13C-3 on Power Supply
Board and GND is DC5V after the malfunction
has been reset.
YES Change Master Board.
NO Check motor for installa-
tion.
Change motor.
M23
CN123
1
2
3
3
2
1
CN30
1
9
11
3
10
11
2
1
PWB-C
PJ13C-1 (DC24V)
PJ13C-2 (GND)
PJ13C-3 (M23 LD)
4002C24TAA