Canon LBP-1120 Service Manual page 96

CHAPTER 4
VI-6. Although the cartridge is installed in the printer, the printer cannot enter the READY mode,
outputting a "NO CARTRIDGE" status.
<Possible Causes>
1. Poor contact in the primary high-voltage contact on the engine controller PCB and cartridge contact.
Action: Clean the contacts if dirty. If the problem still remains after cleaning, or parts are deformed or
damaged, replace them.
2. Defective cartridge.
Action: Replace the cartridge.
3. Defective engine controller PCB.
Action: Replace the engine controller PCB.
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