Minolta DI450, Service Manual, Page: 209 / 271

T-18
Transport/Separator Misfeed Troubleshooting Procedures
• Paper is stopped at the Synchronizing Rollers.
• Paper is stopped near the PC Drum.
• Paper is stopped near the PC Drum Paper Separator Finger.
• Paper is stopped on the Suction Belts.
Step Check Result Action
1 Synchronizing Rollers are dirty with paper
dust, deformed, or worn. YES Clean or change.
2 The length of the loop formed before the Syn-
chronizing Rollers is okay. NO Adjust loop length.
3 I/O check for Synchronizing Roller Sensor
operation: the voltage across PJ4A-3B on Mas-
ter Board and GND is DC0V when the sensor
is unblocked and DC5V when the sensor is
blocked. YES Change Master Board.
NO Correct actuator.
Change sensor.
4 Synchronizing Roller Motor turns when the
Start key is pressed. NO Correct drive coupling.
Change motor or Master
Board.
Step Check Result Action
1 Image Transfer Entrance Guide Plate is dirty
with paper dust, deformed, or worn. YES Clean or change.
2 Image Transfer/Paper Separator Corona wires
are dirty or deteriorated. YES Clean or change.
3 Paper guide above Paper Separator Corona is
dirty or deformed. YES Clean or change.
Step Check Result Action
1 PC Drum Paper Separator Fingers are dirty or
deformed. YES Clean or change.
2 Separator Finger Solenoid operation: the volt-
age across PJ7A-4B on Master Board and
GND is DC24V when the solenoid is deener-
gized and DC0V when the solenoid is ener-
gized. YES Change solenoid.
NO Change Master Board.
Step Check Result Action
1 Suction Belts turn correctly. NO Correct drive coupling.
2 Suction Fan Motor rotation when the Start key
is pressed: the voltage across PJ13A-2B on
Master Board and GND is DC0V when the
motor is deenergized and DC5V when the
motor is energized. YES Change Suction Belts or
motor.
NO Change Master Board.