Canon LBP 2460 - B/W Laser Printer Service Manual page 262

CHAPTER 4
M-19 No Paper Pick-Up from Envelope feeder
<Possible causes>
1. Video controller PCB is defective.
Action: Use the printer driver tester to make a test print from the envelope feeder. If the
envelope is picked up correctly from the envelope feeder, replace the video
controller PCB.
2. Gears are damaged.
Action: Remove the envelope feeder and check the gears. Replace any damaged gears.
3. The envelope feeder pick-up motor is defective.
Action: Use the printer driver tester to rotate the envelope feeder pick-up motor. If it does
not rotate, replace it.
4. The envelope feeder driver PCB is defective.
Action: Replace the envelope feeder driver PCB.
5. The DC controller PCB is defective.
Action: Replace the DC controller PCB.
M-20 No Paper Pick-Up from Paper deck
<Possible causes>
1. Damaged part in the paper pick-up drive unit.
Action: Remove the pick-up unit and replace any damaged parts.
2. Faulty pick-up solenoid
Action: Remove pick-up solenoid connector J115. Measure the resistance between
connectors J115-1 and J115-2 on the cable side. If it is not about 190 , replace the
pick-up solenoid.
3. Defective pick-up motor
Action: Load one sheet of paper into the paper deck. Then after shorting jumpers JP201-2
(TEST-1) and JP201-1 (GND) on the paper deck driver PCB, turn the printer power
switch ON. If the pick-up motor does not rotate at that time, replace the motor.
4. Defective paper deck driver PCB
Action: Replace the paper deck driver PCB.
5. Defective option controller PCB.
Action: Replace the option controller PCB.
6. Defective video controller PCB.
Action: Replace the video controller PCB.
M-21 Registration Roller not rotating (printer)
<Possible causes>
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