Xerox MF Series, Technical Document

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T-15
(6) Abnormally high fusing temperature
<Detection Timing>
<Troubleshooting Procedures>
(7) High voltage failure
<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 Drum Charge Monitor Voltage (HVC_MON) signal falls outside a predetermined
range at any time after the lapse of a predetermined period of time after the Power
Switch has been turned ON.
• The Image Transfer Voltage Monitor signal (T_MON_V) and Image Transfer Current
Monitor signal (T_MON_I) fall outside a corresponding predetermined range.
Relevant Electric Parts
Fusing Unit Controller/Mechanical Control Board (PWB-P)
Step Action Ref. Page
WIRING DIAGRAM
Control Signal
Location
(Electric Parts)
1 Replace Fusing Unit. – – –
2 Replace PWB-P. – – –