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T- 1 6
(6) 100: Fuser temperature low
<Detection Timing>
<Troubleshooting Procedure>
(7) 200: Fuser overheat
<Detection Timing>
<Troubleshooting Procedure>
Description
• The temperature detected by the Thermistor remains lower than the set temperature
continuously for a predetermined period of time while the fusing temperature control is
being provided. (The set temperatures are as follows: 140 °C during a print mode at 600
dpi; 70 °C during the standby mode.)
Relevant Electrical Parts
Fusing Unit
Thermistor (TH1)
Mechanical Control Board (PWB-A)
Thermostat (TS1)
Power Unit (PU1)
Step Action Ref. Page
WIRING DIAGRAM
Control Signal
Location
(Electrical Parts)
1 Replace the Thermistor (TH1). ☞ D-28 ––
2 Replace the Fusing Unit. ☞ E-8 ––
3 Replace PWB-A. ☞ D-11 ––
4 Replace the Power Unit (PU1). ☞ D-14 ––
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 Electrical Parts
Fusing Unit
Thermistor (TH1)
Mechanical Control Board (PWB-A)
Thermostat (TS1)
Power Unit (PU1)
Step Action Ref. Page
WIRING DIAGRAM
Control Signal
Location
(Electrical Parts)
1 Replace the Thermistor (TH1). ☞ D-28 ––
2 Replace the Fusing Unit. ☞ E-8 ––
3 Replace PWB-A. ☞ D-11 ––
4 Replace the Power Unit (PU1). ☞ D-14 ––