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C255C (bizhub C4050i/C3350i)

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Trouble typeC255C: 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 parts• Imaging unit/C,M,Y,K 
• CPU board (CPUB) 
• Base board (BASEB)

Procedure

  1. Reinstall the imaging unit.
  2. Check the connector between the imaging unit/K-relay CN6-BASEB CN14E for proper connection and correct as necessary. (C255C)
  3. Check CPUB for proper installation and correct as necessary.
  4. Replace the corresponding imaging unit.
  5. Replace CPUB. (Part# A93EH01004)
  6. Replace BASEB. (Part# A93EH02007)

Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.

L.3.7.7 (Link to the Field Service Manual)

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