C3726, C3731 (C4751i)
NOTE
- Before parts replacement, do not carry out “trouble resetting by the trouble reset key”. If the trouble resetting is carried out, abnormal heating may occur and smoke may be emitted.
Contents
| Trouble type | C3726: Fusing abnormally high temperature detection (Center of the heating roller)C3731: Fusing abnormally high temperature detection (hard protector) |
| Rank | A |
| Trouble detection condition | When conduction check is carried out for the triac on the board of the DC power supply (DCPS) and an abnormality is confirmed.C3726: Detected temperature of the heating roller thermistor/Ctr (TH2) goes beyond a given temperature for a given period of time consecutively.C3731: The hard protector signal malfunction is detected for a predetermined continuous period of time or more. |
| Trouble isolation | – |
| Relevant electrical parts | Fusing unitC3731: Heating roller thermistor/Edg (TH1)C3731: Heating roller temperature sensor (TEMS)Heating roller thermistor/Ctr (TH2)DC power supply (DCPS)CPU board (CPUB)Base board (BASEB) |