Canon PD-82, Service Manual

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V. MALFUNCTION STATUS TROUBLESHOOTING
M-1 Lifter failure
< possible causes >
1. Cut wire
Action: Replace the wire.
2. Damaged paper surface sensor lever.
Action: Replace it if damaged.
3. Gears are damaged.
Action: Replace it if any gear is damaged.
4. Poor contact in the PAPER SURFACE DETECTION signal line.
Action: Reconnect the paper surface sensor connector J313, intermediate connector J311,
J307 and the connector J212 on the paper deck driver PCB correctly.
5. Poor contact in the LIFTER MOTOR DRIVE signal line.
Action: Reconnect the connector J206 on the paper deck driver PCB correctly.
6. Paper surface sensor failure
Action: Perform the sensor checks described on page 4-7 to check whether the sensor is
normal. Replace the paper surface sensor if it is not normal.
7. Lifter motor failure
Action: Replace it.
8. Paper deck driver PCB failure
Action: Replace it.
M-2 Printer cannot become READY because "Jam status" is output when paper is not
jammed.
<Possible causes>
1. Registration paper sensor lever does not move smoothly or is damaged.
Action: Reset the lever correctly so that it moves smoothly, or replace it if damaged.
2. Paper jam sensor lever does not move smoothly or is damaged.
Action: Reset the lever correctly so that it moves smoothly, or replace it if damaged.
3. Sensor failure
Action: Perform the sensor checks described on page 4-7 and replace any defective sensor.
M-3 Printer cannot become READY because "Door open status" is output when the cover
is closed.
<Possible causes>
1. Projection of the feed unit is damaged.
Action: Replace the part (clutch cover) with the projection.
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CHAPTER 4