Minolta Di450 Service Manual page 466

C0990
Step
1
I/O check for 3
operation: the voltage across PJ8A-2 on Con-
trol Board and GND is DC5V (sensor
unblocked) and DC0V (sensor blocked).
2 I/O check for Lower Position Overrun Detecting
Sensor operation: the voltage across PJ7A-2A
on Control Board and GND is DC5V (sensor
unblocked) and DC0V (sensor blocked).
3 I/O check for Elevator Lower Position Sensor
operation: the voltage across PJ7A-9A on Con-
trol Board and GND is DC5V (sensor
unblocked) and DC0V (sensor blocked).
C0994
Step
1 Elevator Motor turns when the Paper Descent
key is pressed.
2 Elevator Motor rotation: the voltage across
PJ7A-6B (ascent)/PJ7A-7B (descent) on Con-
trol Board and GND is DC0V (motor deener-
gized) and DC24V (motor energized) when the
drawer is slid in or the Paper Descent key is
pressed.
3 I/O check for Elevator Motor Pulse Sensor
operation: the voltage across PJ7A-5A on Con-
trol Board and GND changes in the range
between DC0V and DC5V while the Elevator
Motor is turning.
Check
rd
Drawer Paper Lift-Up Sensor
Check
T-58
Result Action
YES Change Control Board.
NO Change sensor.
YES Change Control Board.
NO Change sensor or Cabinet
Transport Board.
Change flat cable.
YES Change Control Board.
NO Correct actuator. Change
sensor or Cabinet Trans-
port Board. Change flat
cable.
Result Action
NO Correct drive coupling.
YES Change motor or Cabinet
Transport Board. Change
flat cable.
NO Change Control Board.
YES Change Control Board.
NO Change gear or sensor.