C3825, C3826 (C4751i)

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ByEric Ditges
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Contents

Trouble typeC3825: Fusing abnormally low temperature detection (Main of the heating roller)C3826: Fusing abnormally low temperature detection (Center of the heating roller)
RankA
Trouble detection conditionC3825: The heating roller temperature sensor (TEMS) continues to detect a temperature lower than a predetermined one for a predetermined period of time.C3826: The heating roller thermistor/Ctr (TH2) continues to detect a temperature lower than a predetermined one for a predetermined period of time.
Trouble isolation–
Relevant electrical partsFusing unitC3825: Heating roller temperature sensor (TEMS)C3826: Heating roller thermistor/Ctr (TH2)DC power supply (DCPS)CPU board (CPUB)Base board (BASEB)

Procedure

  1. Check the fusing unit for correct installation (whether it is secured in position).
  2. Check the open/close operation of the right door.
  3. Check the connector between the fusing unit-relay CN3-BASEB CN10E for proper connection and correct as necessary.
  4. Check the connector between the fusing unit-relay CN2-DCPS CN2 for proper connection and correct as necessary.
  5. Check CPUB for proper installation and correct as necessary.
  6. Replace the fusing unit.
  7. Replace CPUB.
  8. Replace BASEB.
  9. DCPS F102 or FU181 conduction check.
  10. Replace DCPS.

(Link to the Field Service Manual)