Canon PC400 Service Manual - Page 173

paper feeding normally, at time of jam, The fixing heater fails to operate., Delivery sensor PCB

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CHAPTER 10 TROUBLESHOOTING 11. (paper feeding normally) Cause Copy paper Sensor lever Delivery sensor PCB (Q801) DC controller/DC power supply PCB Step Checks YES/NO Remedies 1 Are there pieces of copy paper in the delivery assembly or pick-up assembly? YES Remove the pieces of paper. 2 Is the movement of the delivery NO Correct the movement. sensor and pick-up sensor levers smooth? 3 Replace the delivery sensor PCB. Does the copier operate normally? YES End. NO Check the wiring from the 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 Control panel PCB DC controller/DC power supply PCB Step Checks 1 Replace the control panel PCB. Does the indicator go ON? YES/NO YES End. Remedies NO Replace the DC controller/ DC power supply PCB. 13. The fixing heater fails to operate. Cause Heater (H1), Thermal fuse (FU2) Thermistor (TH1, TH2) Fixing assembly DC controller/DC power supply PCB Step Checks YES/NO Remedies 1 Is continuity present between terminals of the heater? NO Replace the fixing assembly. 2 Is the resistance between the following terminals on the control panel PCB 0 Ω or about 1.3 M Ω? YES Replace the fixing assembly. TH1 J603-1 £ J603-2 3 Replace the fixing assembly. Is the problem corrected? YES NO End. Replace the DC controller/ DC power supply PCB. COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 10-29

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COPYRIGHT © 1998 CANON INC.
CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
10-29
11.
(paper feeding normally)
12.
(at time of jam)
13. The fixing heater fails to operate.
Cause
Step
Checks
YES/NO
Remedies
Copy paper
1
Are there pieces of copy paper in
the delivery assembly or pick-up
assembly?
YES
Remove the pieces of
paper.
Sensor lever
2
Is the movement of the delivery
sensor and pick-up sensor levers
smooth?
NO
Correct the movement.
Delivery sensor PCB
(Q801)
3
Replace the delivery sensor
PCB.
Does the copier operate
normally?
YES
End.
DC controller/DC
power supply PCB
NO
Check the wiring from the
control panel PCB to the
DC controller/DC power
supply PCB; if normal,
replace the DC
controller/DC power
supply PCB.
Cause
Step
Checks
YES/NO
Remedies
Control panel PCB
1
Replace the control panel PCB.
Does the indicator go ON?
YES
End.
DC controller/DC
power supply PCB
NO
Replace the DC controller/
DC power supply PCB.
Cause
Step
Checks
YES/NO
Remedies
Heater (H1),
Thermal fuse (FU2)
1
Is continuity present between
terminals of the heater?
NO
Replace the fixing
assembly.
Thermistor
(TH1, TH2)
2
Is the resistance between the
following terminals on the control
panel PCB 0
Ω
or about 1.3 M
Ω
?
YES
Replace the fixing
assembly.
TH1
J603-1
↔
J603-2
Fixing assembly
3
Replace the fixing assembly.
Is the problem corrected?
YES
End.
DC controller/DC
power supply PCB
Replace the DC controller/
DC power supply PCB.
NO