I got this code today and don't know how to reset it. Followed some instructions I found on the site for other models, but didn't work.
Step 1:
The error code fusing unit heater lamp malfunction.
Step 2:
Select the trouble reset and exit.If the error code appire again remove the fusing unit and repair.
SOURCE: error code C0500
C0500: Warming-up Failure
C0510: Abnormally Low Fusing Temperature
C0520: Abnormally High Fusing Temperature
Relevant Electrical Parts
Fusing Roller Heater Lamp H1
Fusing Roller Thermistor TH1
Fusing Roller Thermostat TS1
Fusing Roller Heater Lamp Fuse TF1
Side Cover Interlock Switch 2 S3
Power Supply Unit 1 PU1
Master Board PWB-A
Step Check Item Result Action
1 Does H1 turn ON after the malfunction
is reset?
YES Check TH1 for contamination or
installation.
2 Is there continuity across CN3-1
and 2 on the Fusing Unit end with
CN3 (2P) disconnected?
NO Check H1, TS1, and TF1 for continuity.
3 Is there continuity across 1A and
1B, and across 2A and 2B, of S3
when S3 is turned ON?
NO Change S3.
4 Is the resistance of TH1 (across
CN5-2 and 3 on the Fusing Unit
end) infinity?
YES Change TH1.
5 Is Fuse F2 on PU1 conducting? YES Change PU1 or PWB-A.
NO Change the fuse.
Step Check Item Result Action
1 Is TH1 installed properly? NO Install TH1 correctly.
2 Is TH1 dirty? YES Clean or change TH1.
3 Is the circuit across CN5-2 and 3 on
the Fusing Unit end closed when
CN5 (4P) is disconnected?
YES Change
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