Minolta Di450 Service Manual page 245

C0910, C0914
Step
1
Lift-Up Motor turns when the 2
out and then back in.
2
nd
2 Drawer Lift-Up Motor rotation: the voltage
across PJ3A-13B on Master Board and GND is
DC0V (motor deenergized) and DC24V (motor
energized) after the 2
back in.
3
I/O check for 2
Sensor operation: the voltage across PJ3A-
11B on Master Board and GND changes in the
range between DC0V and DC5V while 2
Drawer Lift-Up Motor is turning.
4
nd
I/O check for 2
the voltage across PJ4A-12B on Master Board
and GND is DC0V (sensor unblocked) and
DC5V (sensor blocked).
C0920, C0924
Step
1
Lift-Up Motor turns when the 1
out and then back in.
2 st
1 Drawer Lift-Up Motor rotation: the voltage
across PJ3A-13A on Master Board and GND is
DC0V (motor deenergized) and DC24V (motor
energized) after the 1
back in.
3
I/O check for 1
Sensor operation: the voltage across PJ3A-
11A on Master Board and GND changes in the
range between DC0V and DC5V while 1
Drawer Lift-Up Motor is turning.
4
I/O check for 1
the voltage across PJ4A-6B on Master Board
and GND is DC0V (sensor unblocked) and
DC5V (sensor blocked).
Check
nd
Drawer is slid
nd
Drawer has been slid
nd
Drawer Lift-Up Motor Pulse
Drawer Paper Lift-Up Sensor:
Check
st
Drawer is slid
st
Drawer has been slid
st
Drawer Lift-Up Motor Pulse
st
Drawer Paper Lift-Up Sensor:
T-54
Result
NO Correct drive coupling.
YES Change motor.
NO Change Master Board.
YES Change Master Board.
NO Correct drive coupling.
Change sensor.
nd
YES Change Master Board.
NO Change sensor.
Result
NO Correct drive coupling.
YES Change motor.
NO Change Master Board.
YES Change Master Board.
NO Correct drive coupling.
Change sensor.
st
YES Change Master Board.
NO Change sensor.
Action
Action