CHAPTER 13 TROUBLESHOOTING13-250 COPYRIGHT © 2000 CANON INC. CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.IX . SELF DIAGNOSISThe microprocessor on the copier’s DC controller PCB is equipped with a mechanism thatchecks the state of the copier (especially its sensors). It runs a check as needed and, upon detectionof a fault, indicates a code on the control panel.A. Copier Self DiagnosisCode Cause• The main thermistor (TH1) has poorcontact or an open circuit.• The fixing heater (H1, H2) has an opencircuit.• The thermal switch (TS1) has an opencircuit.• The SSR is faulty.• The DC control PCB is faulty.• The sub thermistor (TH2) has poorcontact or an open circuit.After indicating E000, the power switchturns off in about 5 sec.• The main thermistor (TH1) has a shortcircuit.• The SSR is faulty.• The DC controller PCB is faulty.• The sub thermistor (TH2) has detectedoverheating.• The main thermistor (TH1) has poorcontact or an open circuit.• The fixing heater (H1, H2) has an opencircuit.• The thermal switch (TS1) has an opencircuit.• The SSR is faulty.• The DC controller PCB is faulty.• The main thermistor (TH1) has poorcontact or an open circuit.• The fixing heater (H1, H2) has an opencircuit.• The thermal switch (TS1) has an opencircuit.• The SSR is faulty.• The DC controller PCB is faulty.• The SSR is faulty.• The DC controller PCB is faulty.• The cleaning belt inside the fixingassembly has been taken up.• The fixing cleaning belt length sensor(PS7) is faulty.• The DC controller PCB is faulty.Description• The temperature of the upper fixingroller does not reach 70°C within 3 min30 sec after power-on.• The temperature of the upper fixingroller exceeds 230°C for 2 sec or more.• The difference in detection temperaturebetween the main thermistor (TH1) andthe sub thermistor (TH2) is 50°C for 1sec or more.• The temperature of the upper fixingroller does not reach 100°C within 2.5min after it has exceeded 70°C.• The temperature of the upper fixingroller does not reach 150°C within 2.5min after it has exceeded 100°C.• The temperature of the upper fixingroller drops to 70°C or less for 2 secafter it has reached 100°C.• The SSR used to drive the fixing heaterhas a short circuit.• The cleaning belt inside the fixingassembly has been taken up more than aspecific length.E000(NOTE 1)E001(NOTE 1)E002(NOTE 1)E004(NOTE 1)E005(NOTE 1)E003(NOTE 1)
