Minolta Di450 Service Manual page 436

• Paper is at a stop at the horizontal transport section.
Step
1 Horizontal Transport Rollers are dirty with
paper dust, deformed, or worn.
2 Horizontal transport guide plate is dirty or
deformed.
3 I/O check for Horizontal Transport Entry Sensor
operation: the voltage across PJ12A-6 on Con-
trol Board and GND is DC5V when the sensor
is unblocked and DC0V when the sensor is
blocked.
4 I/O check for Horizontal Transport Jam Sensor
operation: the voltage across PJ12A-3 on Con-
trol Board and GND is DC5V when the sensor
is unblocked and DC0V when the sensor is
blocked.
5 I/O check for Horizontal Transport Exit Sensor
operation: the voltage across PJ12A-4 on Con-
trol Board and GND is DC5V when the sensor
is unblocked and DC0V when the sensor is
blocked.
6 Vertical Transport Motor turns when the Start
key is pressed with the cabinet selected.
Check
T-28
Result Action
YES Clean or change.
YES Clean, correct, or change.
YES Change Control Board.
NO Correct actuator.
Change sensor.
YES Change Control Board or
Master Board.
NO Correct actuator.
Change sensor.
YES Change Control Board or
Master Board.
NO Correct actuator.
Change sensor.
NO Correct drive coupling.
Change motor or Control
Board.
Change Master Board.