C2561, C2562, C2563, C2564 (bizhub C750i)

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Trouble typeC2561: Cyan TCR sensor failure

C2562: Magenta TCR sensor failure

C2563: Yellow TCR sensor failure

C2564: Black TCR sensor failure
RankB
Trouble detection condition-Alarm signals for each TCR sensor is detected more than the predetermined number of times.

-This detection is used for detecting disconnection of TCR sensor connector.
Trouble isolation–
Relevant electrical parts-Developing unit/C,M,Y,K
-Expansion control board (EXCB)
-CPU board (CPUB)
-Base board (BASEB)

Procedure

  1. Reinstall the developing unit.
  2. Check the connector between the developing unit/C-relay CN251-relay CN248-EXCB CN6EX for proper connection and correct as necessary. (C2561)
  3. Check the connector between the developing unit/M-relay CN250-relay CN248-EXCB CN6EX for proper connection and correct as necessary. (C2562)
  4. Check the connector between the developing unit/Y-relay CN249-relay CN248-EXCB CN6EX for proper connection and correct as necessary. (C2563)
  5. Check the connector between the developing unit/K-relay CN252-relay CN25-EXCB CN4EX for proper connection and correct as necessary. (C2564)
  6. Check the connector between EXCB CN1EX-BASEB CN11E for proper connection and correct as necessary.
  7. Check the connector between EXCB CN2EX-BASEB CN12E for proper connection and correct as necessary.
  8. Check CPUB for proper installation and correct as necessary.
  9. Replace the corresponding developing unit.
    (C Part# ACV80KD, M Part# ACV80ED, Y Part# ACV808D, K Part# ACV803D)
  10. Replace EXCB. (Part# AA7NH00500)
  11. Replace CPUB. (Part# ACKNH02P03)
  12. Replace BASEB. (Part# ACKNH02101)

(Link to the Field Service Manual)