4-6
CHAPTER 4 TROUBLESHOOTING MALFUNCTIONS
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
