CHAPTER 11 TROUBLESHOOTINGCOPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)11-94VIII. SELF DIAGNOSISThe microprocessor on the machine's DC controller PCB is equipped with a self diagnosticmechanism that checks the condition of the machine (particularly, sensors) and indicates an errorcode in the count/ratio indicator on the control panel upon detection of a fault.In the case of 'E001', 'E0' and '01' are flashed alternately.Code Cause Description• The thermistor (TH1) is faulty.• The fixing heater (H1) is faulty.• The thermal fuse (FU2) has blown.• The DC controller PCB is faulty.• The composite power supply PCB isfaulty.• The thermistor (TH1) is faulty.• The DC controller PCB is faulty.• The composite power supply PCB isfaulty.• The thermistor (TH1) is faulty.• The fixing heater (H1) is faulty.• The thermal fuse (FU2) has blown.• The DC controller PCB is faulty.• The composite power supply PCB isfaulty.• The thermistor (TH1) is faulty.• The fixing heater (H1) is faulty.• The thermal fuse (FU2) has blown.• The DC controller PCB is faulty.• The composite power supply PCB isfaulty.• The main motor (M1) is fault.• The DC controller PCB is faulty.• The counter has an open circuit.• The temperature detected by thethermistor (TH1) does not reach 65°C1.5 sec after the Copy Start key hasbeen pressed.• The temperature detected by thethermistor (TH1) does not reach 150°C4 sec after the Copy Start key has beenpressed.• The temperature detected by thethermistor (TH1) exceeds 230°C.• The temperature detected by thethermistor (TH1) exceeds by 30°C ormore.• The temperature detected by thethermistor (TH1) registers an increaseof 100°C or more within 1 sec.• The temperature detected by thethermistor (TH1) registers an increaseof 40°C or more after it has reached100°C during standby.• The temperature detected by thethermistor (TH1) has exeeded 150°Cduring copy operation and maximumpower is applied for 10 to 14 secthereafter.• The temperature detected by thethermistor (TH1) drops to and remains150°C or lower after it has reached160°C.• The rotation of the main motor deviates(indicated by MLOCK=0) for 1 sec ormore while the main motor drive signal(MMD=1) is being generated.• The counter drive signal is not generatedwhen the counter is driven.• The counter drive signal is not '0' whenthe counter is not driven.
