Canon GP405 Service Manual page 476

CHAPTER 14 TROUBLESHOOTING
3 E002, E003 (The Fixing Temperature Error message turns on.)
Cause
Thermistor
Wiring
Thermal switch
Relay
DC controller
PCB
Image processor
PCB
14-58
Step
1 Clear the error in service mode.
2 When the machine has warmed up,
does any of the following apply?
• The fixing heater fails to
operate.
• E000 is indicated.
3 Wait until the fixing assembly has
cooled sufficiently; then,
disconnect J426, and measure the
resistance of the thermistor. Is the
reading as follows?
J426 (white harness; TH1): about 0 Ω
J426 (black harness; TH2): about 0 Ω
4 Is the wiring from the connector
J114 on the DC controller PCB to
the thermistor good?
4 Replace the thermal switch. Is the
problem corrected?
5 Replace the relay. Is the problem
corrected?
6 Replace the DC controller PCB. Is
the problem corrected?
7
COPYRIGHT © 1999 CANON INC. CANON 405/335 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Check Yes/No Action
YES See the appropriate
descriptions.
YES Replace the thermistor
unit.
NO Correct the wiring.
YES End.
YES End.
YES End.
NO Replace the image
processor PCB.