Canon LBP-1210 Service Manual page 183

although the cartridge is installed.
<Possible causes>
1) Poor contact between the primary charging bias contact on the engine controller PCB and
the cartridge contact.
Action: Clean the contacts if dirty. If the problem still remains after cleaning, or parts are
deformed or damaged, replace the defective parts.
2) Poor contact in the primary charging bias contact on the engine controller PCB and the car-
tridge contact.
Action: Clean the contacts if dirty. If the problem still remains after cleaning, or parts are
deformed or damaged, replace any defective parts.
3) The cartridge is defective.
Action: Replace the cartridge.
4) The engine controller PCB is defective.
Action: Replace the engine controller PCB.
CHAPTER 4
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