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P-36 (bizhub 950i/850i)

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Malfunction typeMedia sensor failure 2
Malfunction codeP-36
Malfunction detection timing– When starting the machine, or the lower front door or the right door is opened and closed, ultrasonic waves sensor error is detected.

– Measure the received voltages when CLK is output and when CLK is not output, and the values are determined to be faulty.
Relevant parts– Envelope detection board/TX (ENVDB/TX)
– Envelope detection board/RX (ENVDB/RX)
– Envelope detection relay board (ENVDRB)Paper feed/transport – – — drive board (PFTDB)
– CPU board (CPUB)
– Base board (BASEB)

Procedure

  1. Open the right door and check if there is any foreign matter between ENVDB/RX and ENVDB/TX.
  2. Check the connector between ENVDB/RX CN491-relay CN166B-PFTDB CN30 for proper connection and correct as necessary.
  3. Check the connector between ENVDB/TX CN490-ENVDRB CN2 for proper connection and correct as necessary.
  4. Check the connector between ENVDRB CN1-relay CN145A-PFTDB CN30 for proper connection and correct as necessary.
  5. Replace ENVDB/RX.
  6. Replace ENVDB/TX.
  7. Replace ENVDRB.
  8. Check the connector between PFTDB CN4-BASEB CN7E for proper connection and correct as necessary.
  9. Check CPUB for proper installation and correct as necessary.
  10. PFTDB F42 conduction check.
  11. Paper feed/transport drive board (PFTDB)
  12. CPU board (CPUB)
  13. Base board (BASEB)

(Link to the Field Service Manual)

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