Canon CLBR 460ps Service Manual page 282

CHAPTER 4
[ 3-1 ] Multi-purpose tray pick-up block
<Possible causes>
1) Make a test print. If the cassette pick-up roller does not rotate, go to step 4).
2) Dirty/worn/deformed multi-purpose tray pick-up roller
Action: Clean the roller if dirty. Replace it if deformed or worn.
3) Defective lifting plate spring
Action: Re-set the spring correctly if it is out of position. Replace it if deformed or damaged.
4) Make a test print with no left cover unit. If the pick-up motor does not run, go to step 10).
5) Damaged gears
Action: Check the drive gears between the pick-up motor and the multi-purpose tray pick-
up unit. Replace them if damaged.
6) Defective multi-purpose tray pick-up solenoid
Action: Disconnect the multi-purpose tray pick-up solenoid connector J25. Measure the
resistance between cable side connector J25-2 (MLTSL) and J25-1 (+24VA). If it is
not about 160 , replace the solenoid.
7) Damaged multi-purpose tray pick-up clutch
Action: Check the pick-up clutch. Replace it if damaged.
8) Poor contact in the multi-purpose tray pick-up solenoid drive connector
Action: Reconnect the connectors between the multi-purpose tray pick-up solenoid, multi-
purpose tray PCB, and DC controller PCB correctly.
9) Defective multi-purpose tray PCB
Action: Replace the multi-purpose tray PCB.
10) Defective DC controller PCB
Action: Replace the DC controller PCB.
11) Defective pick-up motor
Action: Replace the pick-up motor.
12) Poor contact in the pick-up motor drive connectors
Action: Reconnect the connectors between the pick-up motor, the feed PCB, and the DC
controller PCB correctly.
13) Defective multi-purpose tray PCB
Action: Replace the multi-purpose tray PCB.
14) Defective DC controller PCB
Action: Replace the DC controller PCB.
[ 3-2 ] Cassette pick-up block
<Possible causes>
1) Pull out the cassette after a jam occurred. If the paper is not separated from the cassette
claw, go to step 4).
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