Canon FY8-23AV-000 manual Paper feeding normally, At time of jam, Fixing heater fails to operate

CHAPTER 4 TROUBLESHOOTING MALFUNCTIONS

11. (paper feeding normally)

Cause	Step	Checks	YES/NO	Remedies
Copy paper	1	Are there pieces of copy paper in	YES	Remove the pieces of
		the delivery assembly or pick-up		paper.
		assembly?
Sensor lever	2	Is the movement of the delivery	NO	Correct the movement.
		sensor and pick-up sensor levers
		smooth?
Delivery sensor PCB	3	Replace the delivery sensor	YES	End.
(Q801)		PCB. Does the copier operate
		normally?
DC controller/DC			NO	Check the wiring from the
power supply PCB				control panel PCB to the
				DC controller/DC power
				supply PCB; if normal,
				replace the DC
				controller/DC power
				supply PCB.

12.	(at time of jam)
	Cause	Step	Checks	YES/NO	Remedies
Control panel PCB		1	Replace the control panel PCB.	YES	End.
			Does the indicator go ON?
DC controller/DC				NO	Replace the DC controller/
power supply PCB					DC power supply PCB.

13. The fixing heater fails to operate.

Cause	Step			Checks	YES/NO	Remedies
Heater (H1),	1	Is continuity present between			NO	Replace the fixing
Thermal fuse (FU2)		terminals of the heater?				assembly.
Thermistor	2	Is the resistance between the			YES	Replace the fixing
(TH1, TH2)		following terminals on the control				assembly.
		panel PCB 0Ω or about 1.3 MΩ?
			TH1	J603-1 ↔ J603-2
Fixing assembly	3	Replace the fixing assembly.			YES	End.
		Is the problem corrected?
DC controller/DC					NO	Replace the DC controller/
power supply PCB						DC power supply PCB.

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