Canon CLC 1120 Service Handbook page 249

Code
E804
Caution:
1. The copier may be reset by turning its power switch off and then on when its self
diagnostic mechanism has turned on. This, however, does not apply to E000, E005, E008,
E020 (if xxE0), E717
roller occurring if these errors were designed to be reset while the thermistor has an open
circuit.
2. The fixing cleaning belt counter (COPIER>COUNTER>MISC>FIX-WEB in service
mode) is cleared when the fixing cleaning belt is replaced.
3. 'E004' is indicated on the control panel for about 1.6 sec when the error occurs: thereafter,
the power switch wil be disabled (i.e., error auto power-off is activated).
If such is the case, turn on the power switch while the left front cover is open. The error
code may be checked by COPIER>DISPLAY>ERR in service mode.
Resetting E000, E005, E008, E020,
1) Start service mode, and select COPIER>FUNCTION>CLEAR>ERR (to highlight).
2) Press the OK key.
3) Turn off and then on the power switch.
E717
E717 may be prevented by temporarily disconnecting the communication line using service
mode as follows before disconnecting the copy data controller or the remot diagnostic device
connected to the copier:
1) Start service mode, and select COPIER>OPTION>IN-FACE>B-CLR (to highlight).
2) Enter '0', and press the OK key.
3) End service mode, and perform appropriate servicing.
Cause
• The operation of a fan (indicated
by detail code) is faulty.
• The CPU PCB is faulty.
• The DC driver PCB is faulty.
or E719. This is to prevent possible damage by an overheating fixing
E717, or E719
CHAPTER 5 SELF DIAGNOSIS
Timing of detection
000A The back suction fan (FM16)
has stopped to rotate in error.
000B The power supply cooing fan
1/2 (FM9/FM13) has stopped
in error.
000C The power supply cord base
fan (FM17) has stopped to
rotate in error.
0102 The original exposure system
cooling fan 2/3 (FM14/FM15)
has stopped to rotate in error.
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