Minolta Di450 Service Manual page 424

Multi Bypass Misfeed Troubleshooting Procedures
• Paper is not detected.
Step
1 I/O check for Manual Feed Paper Empty Sen-
sor operation: the voltage across PJ2A-3 on
Master Board and GND is DC0V when the sen-
sor is unblocked and DC5V when the sensor is
blocked.
• Paper is not taken up at all.
Step
1 Paper meets product specifications.
2 Paper is curled, wavy, or damp.
3 Friction Pad and guide plate are dirty with
paper dust, deformed, or worn.
4 Manual Bypass Take-Up Roll is dirty with paper
dust, deformed, or worn.
5 Upper Vertical Transport/Manual Feed Motor
turns when the Start key is pressed with the
Multi Bypass Tray selected.
• Paper is at a stop at the Transport Rollers.
Step
1 Manual Feed Paper Pick-Up Solenoid opera-
tion when the Start key is pressed with paper
loaded in the Multi Bypass Tray: the voltage
across PJ2A-6 on Master Board and GND is
DC24V when the solenoid is deenergized and
DC0V when the solenoid is energized.
2 Transport Rollers are dirty with paper dust,
deformed, or worn.
3 I/O check for Transport Roller Sensor opera-
tion: the voltage across PJ4A-13A on Master
Board and GND is DC0V when the sensor is
unblocked and DC5V when the sensor is
blocked.
Check
Check
Check
T-16
Result Action
YES Change Master Board.
NO Correct actuator.
Change sensor.
Result Action
NO Change paper.
YES Change paper.
Instruct user in correct
paper storage.
YES Clean or change.
YES Clean or change.
NO Correct drive coupling.
Change motor or Master
Board.
Result Action
YES Change solenoid.
NO Change Master Board.
YES Clean or change.
YES Change Master Board.
NO Correct actuator.
Change sensor.