Canon LBP-1000 Service Manual page 144

CHAPTER 4
VI-13. Printer does not enter READY state because "jam status" is output when paper is
not jammed.
<Possible causes>
1. Top-of-page sensor lever does not move smoothly, or is damaged.
Action: Adjust the lever so that it moves smoothly. Replace it if damaged.
2. Poor contact in delivery sensor signal line connector
Action: Reconnect the delivery sensor connector J1701 and the engine controller PCB con-
nector J301 correctly.
3. Delivery sensor lever does not move smoothly, or is damaged.
Action: Adjust the lever so that it moves smoothly. Replace it if damaged.
4. Defective engine controller PCB
Action: Replace the engine controller PCB.
VI-14. Printer does not enter READY state because "LOAD <SIZE> IN CASSETTE 1" is out-
put when the specified size of paper is loaded in the CASSETTE 1.
<Possible causes>
1. Paper sensor lever does not move smoothly, or is damaged.
Action: Adjust the lever so that it moves smoothly. Replace it if damaged.
2. Defective engine controller PCB
Action: Replace the engine controller PCB.
VI-15. Printer does not enter READY state because "LOAD <SIZE> IN MPT" is output when
the specified size of paper is loaded in the Multi-purpose tray.
<Possible causes>
1. Paper sensor lever does not move smoothly, or is damaged.
Action: Adjust the lever so that it moves smoothly. Replace it if damaged.
2. Defective Multi-purpose tray paper sensor.
Action: Replace the Multi-purpose tray paper sensor.
3. Defective engine controller PCB
Action: Replace the engine controller PCB.
VI-16. Printer does not enter READY state because "LOAD <SIZE> IN CASSETTE 2" is out-
put when the specified size of paper is loaded in the paper feeder.
<Possible causes>
1. Paper sensor lever does not move smoothly, or is damaged.
Action: Adjust the lever so that it moves smoothly. Replace it if damaged.
2. Defective paper feeder paper sensor.
Action: Replace the paper feeder paper sensor.
3. Defective paper feeder PCB
Action: Replace the paper feeder PCB.
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