Canon NP6012 Service Manual page 148

OPERATIONS AND TIMING Mis
* Composite power supply PCB
* DC controller PCB (faulty)
¢ The scanner does not leave the home
position within 10 sec after it has started
lo move or the home position cannot be
detected.
* Lens home position sensor (faulty)
¢ Scanner motor (faulty)
eLens cable
* Scanner/lens drive switching mechanism
(faulty)
* DC controller PCB (faulty)
* The lens home position cannot be
detected after the lens has traveled over
its maximum distance.
* The lens does not leave the lens home
position.
* A discrepancy is identified between the
selected reproduction ratio and the lens
position during copying operation.
* Scanning lamp
* Intensity sensor PCB (faulty)
* DC controller PCB (faulty)
* Composite power supply PCB (faulty)
* Intensity adjustment fails to end within 50
sec after the scanning lamp has turned
on.
* The scanning lamp remains on for 5 sec
during standby.
* The scanning lamp remains off for 5 sec
during copying.
* DC controller PCB (faulty)
* Composite power supply (faulty)
« An error is detected in the
communication between the DC
controller PCB and the composite power
supply PCB.
* Power supply frequency (faulty)
* Composite power supply PCB (faulty)
» The intervals in the zero-cross signals is
greater than allowed.
* Data communication with copier (faulty) * The communication with the copier is
interrupted for 5 sec or more; the
communication is monitored at all times.
* DC controller PCB (faulty)
* Composite power supply PCB (faulty)
* Scanning lamp (faulty)
keys on control
board locked
Note:
* The +24V power supply deviates from
the control value by +20% during
copying.
* Scanner home position sensor (PS$1;
faulty)
* Scanner motor (M2; faulty)
* DC controller PCB (faulty)
* The lens home position cannot be
detected after the fens has traveled over
its maximum distance.
* The fens does not leave the lens home
position.
If the self diagnosis mechanism has turned on, you can reset the machine by turning i it off
once. This, however, does not apply in the case of E000, E001, E002, or E003; to ane
perform the following:
COPYRIGHT © 1985 CANON INC.
CANON NP6O12/ NPGOT2F/MP6212 REV.1 SEPT. 1895 PRINTED IN JAPAN (IMPRIME AU! JAPON}
3 - 103