Service manual

T- 3 0
C004C Ventilation Fan Motor’s
failure to turn
• 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.
C004E Power Supply Unit Cool-
ing Fan Motor 1’s failure
to turn
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.
C004F Power Supply Unit Cool-
ing Fan Motor 2’s failure
to turn
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.
C0072 Main Hopper Toner
Replenishing Motor’s fail-
uretoturn
• 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.
C0090 Developing Unit Drive
Motor’s failure to turn
• 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.
C0210 Image Transfer/Paper
Separator Corona
charge leak detected
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.
C0400 Exposure Lamp’s failure
to turn 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.
C0420 Exposure Lamp turning
ON at abnormal timing
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.
Code Description Detection Timing