VIII. SELF DIAGNOSISThe microprocessor on the machine’s DC controller PCB is equipped with a mecha-nism that checks the condition of the machine (of its sensors, in particular), and indicatesan error code when it detects a fault.A. CopierCHAPTER 11 TROUBLESHOOTING11-260 COPYRIGHT © 1997 CANON INC. CANON NP6560/NP6360/NP6260 REV. 0 NOV. 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)Code Cause• Main thermistor (TH1; poor contact,open circuit)• Fixing heater (H1, H2; open circuit)• SSR (fault)• DC controller PCB (fault)• Sub thermistor (TH2; poor contactor open circuit; the power will turnoff in about 5 sec after indication)• Main thermistor (TH1; short circuit)• SSR (fault)• DC controller PCB (fault)• Sub thermistor (TH2; error tempera-ture increase)• Main thermistor (TH1; poor contact,open circuit)• Fixing heater (H1, H2)• Thermal switch (TS1; open circuit)• SSR (fault)• DC controller PCB (fault)• Main thermistor (TH1; poor contact)• Fixing heater (H1, H2; open circuit)• Thermal switch (TS1; open circuit)• SSR (fault)• DC controller PCB (fault)• SSR (fault)• DC controller PCB (fault)• Cleaning belt for the fixing assembly(taken up)• Cleaning belt sensor (PS11; fault)• DC controller PCB (fault)• Fixing/feeding unit sensor(PS53;fault)• Connector for fixing assembly (fault;rear)• DC controller PCB (fault)Description• The temperature of the upper fixingroller does not reach 70°C within 3min and 30 after power-on.• The temperature of the upper fixingroller exceeds 230°C for 2 sec ormore.• The temperature of the upper fixingroller does not reach 100°C in 2 minafter it has reached 70°C.• The temperature of the upper fixingroller does not reach 150°C in 2 secor more after it has reached 100°C.• The temperature of the upper fixingroller is 70°C or less for 2 sec ormore after it has reached 100°C.• The SSR used to drive the fixingheater has a short circuit.• The cleaning belt for the fixingassembly has been taken up morethan specified.• The fixing feeding assemblybecame disconnected during cop-ying.E000(Note 1)E001E002E003E004E005E006
