C0500, C0510
*
After resetting a C0510 condition, C0500 will be shown if the same problem recurs. For this
reason, the same troubleshooting procedure is used for C0500 and C0510.
Step Check Item Result Action
1
Does H1 light up when the Power
Switch is turned ON?
YES Check TH1 for installation or clean it.
NO Begin with step 3.
2
Disconnect CN14 (4P). Is the
resistance across CN14-2 and 3 on the
TH1 side infinity?
YES Replace TH1.
NO
Replace PWB-A.
3
Does the voltage across PJ3A-6 on
PWB-A and GND change from DC4.5V
to DC0V when the Front Door is closed
with the Power Switch in the ON
position?
NO
Replace PWB-A.
4
Disconnect CN5 (2P). Is there
continuity across CN5-1 and 2 on the
Fusing Unit side?
YES Replace UN1.
NO
Check H1 and TF1 for continuity.
C0520
Step Check Item Result Action
A
Does H1 remain lit up even after the
copier has completed warming up?
YES Begin with step B.
NO Begin with step C.
B
Does the voltage across PJ3A-6 on
PWB-A and GND remain DC0V even
after the copier has completed
warming up?
YES
Replace PWB-A.
NO
Replace UN1.
C
Disconnect CN14 (4P). Is the circuit
across CN14-2 and 3 on the Fusing
Unit side short-circuited?
YES Replace TH1.
NO
Replace PWB-A.
T-51
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