Develop D 16G - C0520: Fuser Overheat

T- 1 8
(5) C0520: Fuser overheat
<Detection Timing>
<Troubleshooting Procedures>
(6) C0650: Scanner home sensor error
<Detection Timing>
<Troubleshooting Procedures>
Description
• The temperature detected by the Thermistor remains higher than 235 °C for a predeter-
mined period of time while the fusing temperature control is being provided.
Relevant Electric Parts
Fusing Unit
Thermistor (TH1)
Fusing Roller Heater Lamp (H1)
Controller/Mechanical Control Board (PWB-P)
Thermostat (TS1)
Power Unit (PU1)
Step Action Ref. Page
WIRING DIAGRAM
Control Signal
Location
(Electric Parts)
1 Replace Thermistor (TH1). –– –
2 Replace Fusing Roller Heater
Lamp (H1).
–– –
3 Replace Thermostat (TS1). –– –
4 Replace Fusing Unit. –– –
5 Replace Controller/Mechanical
Control Board (PWB-P).
–– –
6 Replace Power Unit (PU1). –– –
Description
• The Scanner Home Position Sensor is not detected within the predetermined period of
time after the Scanner Motor has started turning.
Relevant Electrical Components
Scanner Motor (M4) Controller/Mechanical Control Board (PWB-P)
Step Action Ref. Page
WIRING DIAGRAM
Control Signal
Location
(Electric Parts)
1 M4 operation check ☞ T- 3 ––
2 Replace PWB-P. –– –