Canon LBP-1120 Service Manual page 95

VI-3. Although a paper jam has not occurred, the printer cannot enter the READY mode,
outputting a "JAM" status.
<Possible Causes>
1. Defective paper delivery sensor spring.
Action: If the spring is not installed correctly, reinstall it correctly. Or, if the spring is deformed or damaged,
replace it.
2. Defective paper delivery sensing lever.
Action: If the lever is not installed correctly, reinstall it correctly. Or, if the lever is deformed or damaged,
replace it.
3. Defective paper top sensor spring.
Action: If the spring is not installed correctly, reinstall it correctly. Or, if the spring is deformed or damaged,
replace it.
4. Defective paper top sensing lever.
Action: If the lever is not installed correctly, reinstall it correctly. Or, if the lever is deformed or damaged,
replace it.
5. Defective engine controller PCB.
Action: Replace the engine controller PCB.
VI-4. Although the door is closed after installing the cartridge, the printer cannot enter the
READY mode, outputting a "DOOR OPEN" status.
<Possible Causes>
1. Damaged claw of the door switch on the connector holder.
Action: Replace the connector holder.
2. Defective door open detection unit.
Action: Replace the door open detection unit.
3. Defective door open detection switch / engine controller PCB.
Action: Replace the engine controller PCB.
VI-5. Although paper is set in the printer, the printer cannot enter the READY mode, outputting a
"PAPER OUT" status.
<Possible Causes>
1. Defective paper out sensing lever.
Action: If the lever is not installed correctly, reinstall it correctly. Or, if the lever is deformed or damaged,
replace it.
2. Defective paper out sensor.
Action: Replace the paper out sensor (PS003.)
3. Defective engine controller PCB.
Action: Replace the engine controller PCB.
CHAPTER 4
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