Canon iR1510

E810 The case that the toner bottle is detected, but not the cartridge. Main cause: The DC controller PCB is faulty. The cartridge is faulty.
1. High-voltage contact (between machine and the developing unit): Is the high-voltage spring used to supply high voltage to the developing unit soild? YES: Clean it. 2. High-voltage contact (between high-voltage spring and DC controller PCB; J207): Is the connection between the high-voltage spring and the DC controller PCB(J207) normal? NO: Correct the connection.. If the problem cannot be corrected, re-place the faulty part. 3. Developing unit, DC controller PCB: Replace the developing unit. Is the problem corrected? YES: End. NO: Replace the DC controller PCB.