Dc Controller/Dc Power Supply Pcb; Control Panel Pcb - Canon PC400 Service Manual

CHAPTER 7 SELF DIAGNOSIS
Code
• Copyboard drive assembly
(faulty operation)
• Copyboard drive solenoid
(SL2; faulty)
• Copyboard position sensor PCB
(Q902; faulty)

• DC controller/DC power supply PCB

(faulty)
• Control panel PCB (faulty)
• DC controller/DC power supply PCB
(faulty)
• Power supply frequency (error)
Note:
1. The copier does not use code 'E1', 'E3', 'E4', or 'E5'.
2. After self diagnosis has gone ON, the copier may be reset by switching it
OFF and then ON.
In the case of 'E0', however, the power is automatically turned OFF. To
reset, disconnect the power plug once, open the upper cover, or wait about 5
minutes without any operation; during the period, the microprocessor
remains powered and retains 'E0'.
This consideration is to prevent the user from resetting the machine easily
when the thermistor may have blown; otherwise, the fixing heater would
become overheated, damaging parts near it.
3. Activation of self diagnosis forces the fixing heater (H1) and main motor (M1)
OFF.
7-2
Cause Description
• The copyboard position sensor (Q902)
goes ON when copying operation starts.
• The copyboard position sensor (Q902)
is ON 0.8 sec after copying operation
has started.
• The copyboard position sensor (Q902)
does not go ON within 5.5 sec after
copying operation has started.
• The copyboard does not reach the start
position within a specific period of time,
or it moves past the start position.
• The copyboard position sensor (Q902)
is ON 1.5 sec after the copyboard has
started moving forward from the start
position.
• The copyboard position sensor (Q902)
does not go ON 10.4 sec after the copy-
board has started moving forward from
the start position.
• The copyboard position sensor (Q902)
does not go ON 1.2 sec or 4.7 sec after
the copyboard has started moving in
reverse from the reversal position.
• The scanning lamp has remained for 2
sec continuously at such times as not
prescribed.
• The power supply frequency is higher
than specified.