C2559, C255A, C255B, C255C (C4751i)

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ByEric Ditges
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Contents

Trouble typeC2559: Cyan TCR sensor adjustment failureC255A: Magenta TCR sensor adjustment failureC255B: Yellow TCR sensor adjustment failureC255C: Black TCR sensor adjustment failure
RankB
Trouble detection conditionTCR sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
Trouble isolation–
Relevant electrical partsImaging unit/C,M,Y,KCPU board (CPUB)Base board (BASEB)

Procedure

  1. Reinstall the imaging unit.
  2. Check the connector between the imaging unit/C-relay CN5-BASEB CN14E for proper connection and correct as necessary. (C2559)
  3. Check the connector between the imaging unit/M-relay CN8-BASEB CN14E for proper connection and correct as necessary. (C255A)
  4. Check the connector between the imaging unit/Y-relay CN7-BASEB CN14E for proper connection and correct as necessary. (C255B)
  5. Check the connector between the imaging unit/K-relay CN6-BASEB CN14E for proper connection and correct as necessary. (C255C)
  6. Check CPUB for proper installation and correct as necessary.
  7. Replace the corresponding imaging unit.
  8. Replace CPUB.
  9. Replace BASEB.

(Link to the Field Service Manual)