Canon NP6317 Service Handbook page 54

CHAPTER 5 OPERATION TROUBLESHOOTING
11. "E802" (main switch auto shut-off mechanism)
Cause/Problem
Procedure
area
Main switch 1
(SW1)
Wiring 2
Control panel 3
PCB
Wiring 4
DC controller
PCB
5-6
Check
Try operating the main switch by hand.
Does it operate normally?
Check the wiring from the DC controller
PCB (J316-1 and -2) to the control panel.
Is it normal?
Is there electrical continuity from J503-1
to J509-2 on the control panel PCB?
Is the wiring from J509 of the control
panel PCB to the main switch normal?
Result Action
No Replace the main switch.
No Correct the wiring.
No Replace the control
panel PCB.
No Correct the wiring.
Yes Replace the DC control-
ler PCB.