Canon iR1200 Series Service Manual page 359

Main cause The fixing film unit is faulty (main thermistor fault, thermal
fuse blow, fixing
heater fault). The power supply PCB is faulty. The DC
controller PCB
is faulty.
Action 1. Malfunction
Turn off the power; wait for 10 min, and turn on the power. Is
the problem corrected?
YES: End.
2. Wiring
Is the wiring from the DC controller PCB to the fixing film unit
normal?
NO: Correct the wiring.
3. Fixing film unit
Try replacing the fixing film unit. Is the problem corrected?
YES: End.
4. Power supply PCB, DC controller PCB
Try replacing the power supply PCB. Is the problem corrected?
YES: End.
NO: Replace the DC controller PCB.
E100
About 1.5 sec after the scanner drive signal output, the BDI*
signal is not detected 3 times or more for 1.0 sec.
While the laser is ON, the BD signal cycle is not as indicated
for 0.5 or more continuously.
Main cause The laser driver/BD PCB is faulty (laser activation failure, BD
detection fault). The DC controller PCB is faulty. The image
processor PCB is faulty.
T-14-5
Chapter 14
14-3