C004E: Power Supply Unit Cooling Fan Motor 1'S Failure To Turn C004F: Power Supply Unit Cooling Fan Motor 2'S Failure To Turn; C0090 Developing Unit Drive Motor's Failure To Turn; C0210 Image Transfer/Paper Separator Corona Charge Leak Detected; C0420 Exposure Lamp Turning On At Abnormal Timing - Minolta Di450 Service Manual

Code Description
C004C Ventilation Fan Motor's
failure to turn
C004E Power Supply Unit Cool-
ing Fan Motor 1's failure
to turn
C004F Power Supply Unit Cool-
ing Fan Motor 2's failure
to turn
C0072 Main Hopper Toner
Replenishing Motor's fail-
ure to turn
C0090 Developing Unit Drive
Motor's failure to turn
C0210 Image Transfer/Paper
Separator Corona
charge leak detected
C0400 Exposure Lamp's failure
to turn ON
C0420 Exposure Lamp turning
ON at abnormal timing
Detection Timing
• The Lock signal remains HIGH for a continuous
period of 1.5 sec. or more after the lapse of 10 sec.
after the motor has started turning.
• The Lock signal remains LOW for a continuous
period of 1.5 sec. or more after the lapse of 10 sec.
after the motor has stopped turning.
The Lock signal remains HIGH for a continuous period
of 1.5 sec. or more after the lapse of 10 sec. after the
motor has started turning at high speed.
The Lock signal remains HIGH for a continuous period
of 1.5 sec. or more after the lapse of 10 sec. after the
motor has started turning at high speed.
• The Toner Bottle Home Position Sensor does not go
HIGH within 5 sec. after the motor has started turn-
ing.
• The Toner Bottle Home Position Sensor does not go
LOW within 10 sec. after the motor has started turn-
ing and the sensor has gone HIGH.
• The motor is stationary or the Toner Bottle Home
Position Sensor is HIGH 2 sec. after the motor has
stopped turning.
• The Lock signal remains HIGH for a continuous
period of 1.5 sec. or more after the lapse of 10 sec.
after the motor has started turning.
• The Lock signal remains LOW for a continuous
period of 1.5 sec. or more after the lapse of 10 sec.
after the motor has stopped turning.
The Charge Leak Detection signal (SCD) remains ON
for a continuous period of 0.3 sec. after the Image
Transfer/Paper Separator Corona output has been
turned ON.
• During a light intensity adjustment sequence, the
CCD read data does not exceed the specified level
when the peak of the intensity of light is detected
within 1 min. after the Exposure Lamp has turned
ON.
• Under normal conditions, the CCD read data does
not exceed the specified level 450 ms after the
Exposure Lamp has turned ON.
During a light intensity adjustment sequence, the
adjusted value for the intensity of light remains at the
lower limit and the CCD output level is at the saturation
level even after the lapse of 2 sec. after the Exposure
Lamp has turned ON.
T-30