Minolta Di450 Service Manual page 471

(17) C0D50: Duplex Horizontal Transport Motor malfunction
Horizontal Transport Motor (M131)
M131
C0D50
Step
1 Horizontal Transport Motor turns when the
Start key is pressed.
2 Horizontal Transport Motor rotation: the voltage
across PJ12A-5 on Control Board and GND is
DC5V (motor deenergized) and DC0V (motor
energized) when the Start key is pressed.
3 Horizontal Transport Motor rotation: the voltage
across PJ12A-7 on Control Board and GND is
DC5V (motor deenergized) and DC0V (motor
energized) when the Start key is pressed.
Relevant Electrical Parts
Control Board (PWB-A)
PJ25
CN8
7
6 12 12
5 11 11
4 10 10
3 9 9
2 8 8
1 7 7
6 6
5 5
4 4
3 3
2 2
1 1
Check
T-63
PWB-A
(Cabinet)
PJ12A-13(GND)
PJ12A-12(DC5V)
PJ12A-10(GND)
PJ12A-9(DC24V)
PJ12A-8(M131 CLK)
PJ12A-7(M131 LOCK)
PJ12A-5(M131 REM)
PJ12A-1(GND)
4002C25TAA
Result Action
NO Correct drive coupling.
NO Change Control Board.
YES Change Control Board.
NO Change motor.