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C760C (bizhub 950i/850i)

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Contents

Trouble typeC760C: Power line A12 error
RankC
Trouble detection conditionThe fuse detection unit detected an error for a predetermined time.
Trouble isolation
Relevant electrical parts– Ozone ventilation fan (FM6)
– Paper cooling fan/in (FM12)
– Fusing power supply cooling fan (FM10)
– DC power supply cooling fan (FM9)
– Paper cooling fan/out (FM13)
– Tucking fan/Md (FM101)
– Tucking fan/Rr (FM102)
– Tucking fan/Fr (FM103)
– Total counter (TCT) (Not included)
– Dehumidifier drive board (DEDB)Key counter (KCT)
– Toner suction fan (FM7)
– Toner cartridge cooling fan/1 (FM8)
– Base board (BASEB)

Procedure

  1. BASEB F6E conduction check.
  2. Check the connector between FM6-relay CN322-BASEB CN27E for proper connection and correct as necessary.
  3. Check the connector between FM12-relay CN325-BASEB CN27E for proper connection and correct as necessary.
  4. Check the connector between FM10-relay CN803-BASEB CN23E for proper connection and correct as necessary.
  5. Check the connector between FM9-relay CN333-BASEB CN23E for proper connection and correct as necessary.
  6. Check the connector between FM13-relay CN323-BASEB CN27E for proper connection and correct as necessary.
  7. Check the connector between FM101-relay CN337-relay CN334-BASEB CN25E for proper connection and correct as necessary.
  8. Check the connector between FM102-relay CN335-relay CN334-BASEB CN25E for proper connection and correct as necessary.
  9. Check the connector between FM103-relay CN336-relay CN334-BASEB CN25E for proper connection and correct as necessary.
  10. Check the connector between TCT-relay CN702-BASEB CN27E for proper connection and correct as necessary. (Not included)
  11. Check the connector between DEDB CN2-relay CN601-BASEB CN23E for proper connection and correct as necessary.
  12. Check the connector between KCT-relay CN615-BASEB CN23E for proper connection and correct as necessary.
  13. Check the connector between FM7-relay CN326-BASEB CN24E for proper connection and correct as necessary.
  14. Check the connector between FM8-relay CN522-BASEB CN24E for proper connection and correct as necessary.
  15. FM6 load check
    • Check code: 42
    • Multi code: 11, 12
    • Control signal: BASEB CN27E-7 to 9
    • Location of electrical component: 13-C
  16. Ozone ventilation fan (FM6)
  17. FM12 load check
    • Check code: 42
    • Multi code: 18, 19
    • Control signal: BASEB CN27E-4 to 6
    • Location of electrical component: 13-C
  18. Paper cooling fan/in (FM12)
  19. FM10 load check
    • Check code: 42
    • Multi code: 27, 33
    • Control signal: BASEB CN23E-10 to 12
    • Location of electrical component: 10-K
  20. Fusing power supply cooling fan (FM10)
  21. FM9 load check
    • Check code: 42
    • Multi code: 9, 10
    • Control signal: BASEB CN23E-7 to 9
    • Location of electrical component: 9-K
  22. DC power supply cooling fan (FM9)
  23. FM13 load check
    • Check code: 42
    • Multi code: 13
    • Control signal: BASEB CN27E-10 to 12
    • Location of electrical component: 14-C
  24. Paper cooling fan/out (FM13)
  25. FM101 load check
    • Check code: 42
    • Multi code: 22
    • Control signal: BASEB CN25E-1 to 3
    • Location of electrical component: 7-K
  26. Tucking fan/Md (FM101), Tucking fan/Rr (FM102), Tucking fan/Fr (FM103)
  27. FM102 load check
    • Check code: 42
    • Multi code: 23
    • Control signal: BASEB CN25E-7, 8
    • Location of electrical component: 7-K
  28. Tucking fan/Md (FM101), Tucking fan/Rr (FM102), Tucking fan/Fr (FM103)
  29. FM103 load check
    • Check code: 42
    • Multi code: 23
    • Control signal: BASEB CN25E-4, 5
    • Location of electrical component: 7-K
  30. Tucking fan/Md (FM101), Tucking fan/Rr (FM102), Tucking fan/Fr (FM103)
  31. Dehumidifier drive board (DEDB)
  32. Replace the key counter.
  33. FM7 load check
    • Check code: 42
    • Multi code: 1
    • Control signal: BASEB CN24E-4 to 6
    • Location of electrical component: 1-K
  34. Toner suction fan (FM7)
  35. FM8 load check
    • Check code: 42
    • Multi code: 24
    • Control signal: BASEB CN24E-1 to 3
    • Location of electrical component: 1-K
  36. Toner cartridge cooling fan/1 (FM8)
  37. Base board (BASEB)

(Link to the Field Service Manual)

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