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C255C (bizhub C754/C654)

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

Contents

Trouble typeBlack TCR sensor adjustment failure
Trouble codeC255C
RankB
Detection timingTCR sensor automatic adjustment does not function properly, failing to adjust to an appropriate value.
Trouble isolation
Relevant electrical parts-Developing unit /K
-Printer control board (PRCB)

(2)Procedure

StepActionControl signalLocation of electrical components
1Reinstall the developing unit/K
2Replace the developing unit /K (Part# A2X203D)
3PRCB ICP23 or ICP24 conduction check
4Replace PRCB (Part# A2X0H00102)

K.3.7.19 (Link to the Field Service Manual)

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