Technical information

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COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON CLC5000 REV.0 JAN. 2001
CHAPTER 2 NEW FUNCTIONS
6.6.3 Detecting an Open Circuit in the Thermistor
If the open-circuit detection circuit on the DC controller PCB detects a difference of 60°C
or more in the readings of the main thermistor and the sub thermistor, the DC controller
PCB will issue the following error codes: then, it will cause the power OFF signal
(PWOFF*) to go ‘0’, thereby turning off the power switch (SW2).
Upper main thermistor (TH1) and upper sub thermistor (TH2) E000-0105
Lower main thermistor (TH3) and lower sub thermistor (TH4) E000-0205
6.6.4 Detecting a Fault in the Triac
The triac short-circuit detection circuit on the AC driver PCB monitors the drive of the
fixing heater, and will issue the following error codes if the fixing heater is on when it is not
expected to be on.
Fault in triac (TR2) for upper fixing heater E004-0001
Fault in triac (TR1) for lower fixing heater E004-0001
6.6.5 Detecting Overheating of Fixing Oil (software)
The CPU on the DC controller PCB monitors the voltage of the oil heater thermistor
(TH5) and the oil thermistor (TH6), and will issue the following error codes in the presence
of a fault:
Thermistor Detection temperature Error code
Oil thermistor (TH5) 180ºC E000-0061
Oil heater thermistor (TH6) 220ºC E000-0071
6.6.6 Detecting Overheating of Fixing Oil (hardware)
If the overheating detection circuit on the DC controller PCB detects overheating, the DC
controller PCB will issue the following error codes; then, it will cause the power OFF signal
(PWOFF*) to go ‘0’, thereby turning off the power switch.
Thermistor Detection temperature Error code
Oil thermistor (TH5) 190ºC E000-0081
Oil heater thermistor (TH6) 230ºC E000-0081