C2564 (bizhub 950i/850i)

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Trouble typeC2564: Black TCR sensor failure
RankB
Trouble detection condition– The output of the TCR sensor is 0.

– This detection is used for detecting disconnection of TCR sensor connector.
Trouble isolation–
Relevant electrical parts– Developing unit
– PH relay board (PHRYB)
– CPU board (CPUB)
– Base board (BASEB)

Procedure

  1. Reinstall the developing unit.
  2. Check the connector between the developing unit-relay and CN214-PHRYB CN6 for proper connection and correct as necessary.
  3. Check CPUB for proper installation and correct as necessary.
  4. Replace the developing unit.
  5. PHRYB PS1 conduction check.
  6. Replace PHRYB.
  7. Replace CPUB.
  8. Replace BASEB.

(Link to the Field Service Manual)