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COPYRIGHT
©
1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
10–99
CHAPTER 10 TROUBLESHOOTING
VIII. SELF DIAGNOSIS
The microprocessor on the copier’s DC controller PCB is equipped with a function that
checks the condition of the machine (especially the condition of sensors). It runs checks at such
times as programmed, and will indicate any fault it finds in the form of code.
A. Copier
E000
• The thermistor (TH1, TH2) has poor
contact or an open circuit.
• The fixing heater (H1) has an open circuit.
• The thermal switch (TSW1) has turned on.
• The triac is faulty.
• The DC controller PCB is faulty.
• The thermistor (TH1, TH2) has a short
circuit.
• The triac is faulty.
• The DC controller PCB is faulty.
• The thermistor (TH1, TH2) has poor
contact or an open circuit.
• The fixing heater (H1) has an open circuit.
• The thermal switch (TSW1) has turned on.
• The triac is faulty.
• The DC controller PCB is faulty.
• The thermistor (TH1, TH2) has poor
contact or an open circuit.
• The fixing heater (H1) has an open circuit.
• The thermal switch (TSW1) has turned on.
• The triac is faulty.
• The DC controller PCB is faulty.
• The triac has a short circuit.
• The DC controller PCB is faulty.
• The surface temperature of the fixing upper
roller does not reach 40°C within 14 sec
after power-on.
• The surface temperature of the fixing upper
roller exceeded 230°C.
• The surface temperature of the fixing upper
roller does not reach 60°C within 10 after it
exceeded 40°C.
• The surface temperature of the fixing upper
roller does not reach 80°C within 10 sec
after it exceeded 60°C.
• The surface temperature of the fixing upper
roller does not reach 100°C within 10 sec
after it exceeded 80°C.
• The surface temperature of the fixing upper
roller does not reach 120°C within 10 sec
after it exceeded 100°C.
• The surface temperature of the fixing upper
roller drops to 130°C or less after it
reached the target temperature (160°C) for
standby.
• The triac is identified as having a short
circuit.
Code
Cause Description
E001
E002
E004
E003