Minolta Di251 Service Manual page 325

Duplex Turnover/Take-Up Misfeed (AD-15) Troubleshooting Procedures
• Paper is at a stop near the exit section.
Step
1 Paper Exit Roller is dirty, deformed, or worn.
2 Duplex Unit Transport Roller/Roll 1 is dirty,
deformed, or worn.
3 Paper Exit Sensor operation check through I/O
check
4 Duplex Unit Turnover Motor operation check:
Duplex Unit Turnover Motor turns during a 2-
sided copy run.
5 Duplex Unit Turnover Motor operation check:
the voltage across PJ1A-9 on Duplex Unit Con-
trol Board and GND changes from DC5 V to
DC0 V during a 2-sided copy run.
6 Duplex Unit Turnover Motor operation check:
the direction of rotation of Duplex Unit Turnover
Motor changes from forward to backward dur-
ing a 2-sided copy run.
7 Duplex Unit Turnover Motor operation check:
the voltage across PJ1A-7 on Duplex Unit Con-
trol Board and GND changes from DC5 V to
DC0 V during a 2-sided copy run.
8 Duplex Unit Transport Motor operation check:
Duplex Unit Transport Motor turns during a 2-
sided copy run.
9 Duplex Unit Transport Motor operation check:
the voltage across PJ1A-11 on Duplex Unit
Control Board and GND changes from DC5 V
to DC0 V during a 2-sided copy run.
Check
T-27
Result Action
YES Clean or change.
YES Clean or change.
NO Check actuator.
Change Paper Exit Sen-
sor.
YES Check step 6 and onward.
YES Change Duplex Unit Turn-
over Motor.
Change Duplex Unit Con-
trol Board.
NO Change Master Board.
YES Check step 8 and onward.
YES Change Duplex Unit Turn-
over Motor.
Change Duplex Unit Con-
trol Board.
NO Change Master Board.
YES Change Master Board.
YES Change Duplex Unit Trans-
port Motor.
Change Duplex Unit Con-
trol Board.
NO Change Master Board.