Canon LBP-1210 Service Manual page 177

III-1. Paper pick-up and feed block
<Possible causes>
1) The top of page sensor lever is not moving smoothly or is damaged.
Action: Replace the top of page sensor lever if damaged. If this does not rectify the situa-
tion, replace the sensor.
2) The top of page sensor lever spring is defective.
Action: Set the spring in the right position if out of place. Replace the spring if deformed
or damaged.
3) The pick-up roller or feed roller is worn, deformed, or dirty.
Action: Clean the roller if dirty. Replace it if worn or deformed.
4) The separation pad is worn, deformed or dirty.
Action: Clean the roller if dirty. Replace it if worn or deformed.
5) The lifting plate spring is defective.
Action: Set the spring in the right position if out of place. Replace the spring if deformed
or damaged.
6) The contact in the connector on the main motor drive signal line is poor.
Action: Reconnect the connector J001 on the main motor.
7) The contact in the connector on the pick-up roller solenoid drive signal line is poor.
Action: Reconnect the connector J204 on the engine controller PCB.
8) The pick-up roller solenoid is defective.
Action: Disconnect the connector J204 on the engine controller PCB. Measure the resist-
ance value between the connectors J204-1 and J204-2 on the cable. If the meas-
ured value is not about 107 Ω, replace the pick-up roller solenoid.
9) The top of page sensor is defective.
Action: Replace the top of page sensor PCB.
10) The main motor is defective.
Action: Replace the main motor.
11) The engine controller PCB is defective.
Action: Replace the engine controller PCB.
III-2. Fixing and delivery block
<Possible causes>
1) The face-up cover is defective.
Action: If the face-up cover is worn, broken, nicked, or damaged, replace it.
2) The fixing unit entrance guide is dirty or scarred, or there is toner projection on the guide.
Action: Clean the guide. Replace the guide if the dirt cannot be removed.
3) The pressure (nip width) of the pressure roller is not within the specification.
CHAPTER 4
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