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| Code |
Description
Detection Timing
© PC12 does not go from HIGH to LOW even when M5 is
energized for 1400 pulses for the lens movement in the
enlargement direction.
The output from AE Sensor Board PWB-E is 4.8V or more, or
less than 0.4V when the Exposure Lamp is OFF and Scanner
at home position.
ATDC Sensor malfunction
| The output from ATDC Sensor UNS is 4.8V or more, or less
CF3
than 0.4V,
EEPROM malfunction
Data which must be retained even when power is turned OFF
cannot be written to, and read from, the EEPROM.
IU toner detection failure
The output from ATDC Sensor UN3 remains less than 1.0V
during an F8 operation.
| ee | Blown IU fuse detection
The IU fuse is not blown during an F8 operation.
failure
AE Sensor malfunction
T-15
115988 TO302A
3-2, Troubleshooting Procedures
1158SBT030201A
1) C00: Main Drive Motor's Failure to Turn
Relevant Electrical Parts
@ Main Drive Motor (M1)
@ Power Supply Unit (PU1)
@ Master Board (PWB-A)
ee"
M1 Rotation {DCOV
I1BOCOBTAA
NY
Does the voltage across PJ4A-4 on PWB-A and GND change
Change PWB-A,
from DCS5V to DCOV when the Start key is pressed?
Is the voitage across PJ4A-3 on PWB-A and GND DCOV when
YES
Change M1.
Power Switch $1 is turned ON?
Is the voltage across PJ4-1 on PU1 and GND DC24V when $1
Change PU1.
is turned ON?
T-16
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