Minolta Di450 Service Manual page 435

Duplex Paper Take-Up Misfeed Troubleshooting Procedures
• Paper is at a stop at the turnover section.
Step
1 Rollers at the turnover section are dirty,
deformed, or worn.
2 Guide plate at the turnover section is dirty or
deformed.
3 A torn piece of paper is left at the turnover sec-
tion.
4 I/O check for Turnover Feed Entry Sensor oper-
ation: the voltage across PJ8A-9 on Master
Board and GND is DC0V when the sensor is
unblocked and DC5V when the sensor is
blocked.
5 I/O check for Turnover Feed Jam Sensor oper-
ation: the voltage across PJ8A-6 on Master
Board and GND is DC0V when the sensor is
unblocked and DC5V when the sensor is
blocked.
6 I/O check for Turnover/Exit Sensor operation:
the voltage across PJ8A-3 on Master Board
and GND is DC0V when the sensor is
unblocked and DC5V when the sensor is
blocked.
7 Horizontal Transport Motor rotation: the voltage
across PJ12A-5 on Control Board and GND is
DC0V when the motor is deenergized and
DC5V when the motor is energized.
8 Turnover Motor rotation
Check
T-27
Result Action
YES Clean or change.
YES Clean, correct, or change.
YES Clean.
YES Change Master Board.
NO Correct actuator.
Change sensor.
YES Change Master Board.
NO Correct actuator.
Change sensor.
YES Change Master Board.
NO Correct actuator.
Change sensor.
YES Change motor.
NO Change Control Board.
NO Correct drive coupling.
Change motor or Master
Board.