TECO UA1610, Service Manual

Page: 302 / 388

T-15
(3) C0500: Fuser warm up error
<Detection Timing>
<Troubleshooting Procedures>
Description
• The voltage of the Thermistor remains low for a predetermined period of time when a
warm-up cycle is started.
• The temperature detected by the Thermistor remains lower than a reference value for a
predetermined period of time for the period of time that begins 5 sec. after, and ends 9
sec. after, the start of the warm-up cycle (where the temperature detected by the Ther-
mistor is 80 °C or less).
• The temperature detected by the Thermistor does not increase for a 3-sec. period or
more for the period of time that begins after the lapse of a predetermined period of time
after the Fusing Roller Heater Lamp has been turned ON and ends when the lamp is
turned OFF.
• The Fusing Roller Heater Lamp remains ON for a 30-sec. period or more (except during
the period through which the Main Motor remains energized).
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).
☞
D-28 – –
2 Replace Fusing Unit.
☞
E-7 – –
3 Replace Controller/Mechanical
Control Board (PWB-P).
☞
D-11 – –
4 Replace Power Unit (PU1).
☞
D-14 – –
Field_Service_E.book 15 ページ ２００４年２月２５日 水曜日 午後６時５９分