Canon LBP-860 Service Manual page 181

CHAPTER 6
M- 11 "16 TONER LOW" indicator does not light properly.
Possible cause Step
2
power supply
(high-voltage
contacts)
D C 3
PCB
M - 12 Faulty Pick-up Motor
step
2
3
_
Pick-up molar
driver PCB
DC controller
PCB
Download Service Manual and Resetter Printer at http://printer1.blogspot.com
Check
Shake the cartridge following the
instructions. and load it in to the
printer. Does the message disappear7
printer driver tester, and turn the
power back ON. Does the TONER
SENSOR LED of the tester light for a
while aftw the power swKch is turned
ON.
Check
connector 5201 on the DC controller
PCB to connector J701 on the sensor
PCB making good
Are the connectors 5701 and J702 on
the sensor PCB properly aligned ?
About on? second after switch is
turned ON. do the voltages between
the following pairs of terminals on the
about 24 VDC to about 15 VDC?
. J701-Al (PA) and J701-A5 (GND)
Result
Procedure
The toner is insufficlent.
Prepare a new cartridge.
Clean the high-voltage
contact.
Replace the DC controller
PCB.
Replace the high-voltage
power supply PCB.
Result Procedure
Reattach the connectors
Replace the sensor PCB
driver PCB. If the problem
persists after replacing the
PCB. replace the DC
P C B .