Canon PC980 Service Manual - Page 351

CHAPTER 11 TROUBLESHOOTING VII. SELF DIAGNOSIS The microprocessor on the machine's DC controller PCB is equipped with a self diagnostic mechanism that checks the condition of the machine (particularly, sensors) and indicates an error code 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 'E000', 'E001', 'E002', or 'E003' has occurred. • 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 is faulty. • The thermistor (TH1) is faulty. • The DC controller PCB is faulty. • The composite power supply PCB is faulty. • 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 is faulty. • 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 is faulty. Description The power switch is turned off and then on immediately after an error ('E000', 'E001', 'E002', 'E003') has occurred. • The temperature detected by the thermistor (TH1) does not reach 65°C 1.5 sec after the Copy Start key has been pressed. • The temperature detected by the thermistor (TH1) does not reach 150°C 4 sec after the Copy Start key has been pressed. • The temperature detected by the thermistor (TH1) exceeds 230°C. • The temperature detected by the thermistor (TH1) exceeds by 30°C or more. • The temperature detected by the thermistor (TH1) registers an increase of 100°C or more within 1 sec. • The temperature detected by the thermistor (TH1) registers an increase of 40°C or more after it has reached 100°C during standby. • E0 detection signal (E0_DT) is detected twice or more in succession. • The temperature detected by the thermistor (TH1) has exeeded 150°C during copy operation and maximum power is applied for 10 to 14 sec thereafter. • The temperature detected by the thermistor (TH1) drops to and remains 150°C or lower after it has reached 160°C. 11-86 COPYRIGHT © 1999 CANON INC. CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)