Canon LBP-1260 Service Manual page 177

Step
1
2
3
4
Pick-up motor
driver PCB
DC controller
PCB
Sensor arm
5
Delivery 6
paper sensor
driver PCB
DC controller
PCB
Check
Is the dellvery cover open?
Do you have a printer driver tester 7
Connect the printer driver tester to
the printer. Is the REGIST SENSOR
LED of the tester ON?
Is the DELIVERY SENSOR LED of the
tester ON?
Is the regist paper sensor arm or
When the delivery paper sensor arm Is
moved. does the voltage between
connectors 5210.3 (PSNS) and 5210.2
change from zero to about 5 VDC?
When the regist paper sensor arm is
moved, does the voltage between
connectors 5605-6 (RESS) and
driver PCB change from about 5 VDC
to zero?
Result Procedure
YES Securely close the cover.
YES Proceed to step 3.
NO Proceed to step 5.
YES Check whether the regist
paper sensor arm is
damaged. If it is
it: if it is not, replace the
regist paper sensor.
Check whether the delivery
YES
paper sensor arm is
damaged. If it Is, replace It:
If It is not. replace the
NO Replace the pick-up motor
driver PCB. If the problem
persists. replace the DC
controller PCB.
Replace the damaged paper
sensor arm.
N O Replace the delivery paper
sensor.
Replace the pick-up motor
driver PCB. If the problem
persists after replacing the
controller FCB.
NO Replace the regist paper
sensor.
replace
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