COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10–101CHAPTER 10 TROUBLESHOOTING• IC114 (IPC) on the DC controller PCBcannot be initialized at power -on.• An IPC communication error has beendetected twice or more within 1 sec atpower-on.• A communication error with the ADFcontroller PCB cannot be cleared.• A condition in which a response from theRemote Diagnostic Device II cannot bereceived occurred three timescontinuously.• The Remote diagnostic Device IIcommunicates an interruption of countpulses.• An open circuit is detected for 5 V or 24 Vat power-on.• The exhaust fan drive detection signal(EXFAN1_DT*, FXFAN0_DT*) cannotbe detected 0.5 sec after the start of theexhaust fan (FM2, FM4).• The cleaner thermistor (TH3) detects 55°Cor more.• The DC controller PCB is faulty.• The DC controller PCB is faulty.• The DC controller PCB is faulty.• The ADF controller PCB is fault.• The ADF cable is faulty.• The DC controller PCB is faulty.• The Remote Diagnostic Device II PCB isfaulty.• The auto power-off circuit has an opencircuit.• The DC controller PCB is faulty.• The exhaust fan (FM2, FM4) is faulty.• The DC controller PCB is faulty.• The ozone filter is clogged.• The cleaner thermistor (TH3) has poorcontact or an open circuit.• The DC controller PCB is faulty.E710E805Code Cause DescriptionE711E712E717E800E821
