C2153, C2154, C2155, C2156 (C4751i)

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ByEric Ditges
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Contents

Trouble typeC2153: Transfer belt spacing fault at K pressure switchingC2154: Transfer belt contact fault at all pressure switchingC2155: Transfer belt contact fault after K pressure establishedC2156: Transfer belt spacing fault after all pressure established
RankB
Trouble detection conditionC2153: The 1st transfer pressure switch (SW4) is not turned ON even after the lapse of a given period of time after the retraction operation started.C2154: The 1st transfer pressure switch (SW4) is not turned OFF even after the lapse of a given period of time after the pressure operation started.C2155: The 1st transfer pressure sensor (SW4) is turned OFF after the lapse of given time after the retraction operation is finished.C2156: The 1st transfer pressure sensor (SW4) is turned ON after the lapse of given time after the pressure operation is finished.
Trouble isolation–
Relevant electrical partsColor PC motor (M2)1st transfer pressure clutch (CL1)1st transfer pressure switch (SW4)CPU board (CPUB)Base board (BASEB)

Procedure

  1. Check the connector between M2-BASEB CN24E for proper connection and correct as necessary.
  2. Check the connector of M2 for proper drive coupling and correct as necessary.
  3. Check the connector between SW4-BASEB CN18E for proper connection and correct as necessary.
  4. Check the connector between CL1-relay CN13-BASEB CN18E for proper connection and correct as necessary.
  5. Check CPUB for proper installation and correct as necessary.
  6. SW4 I/O check, sensor check
    • Control signal: BASEB CN18E-2 (ON)
    • Location of electrical component: 2-C
  7. CL1 load check
    • Check code: 24
    • Multi code: 1
    • Control signal: BASEB CN18E-3 (ON)
    • Location of electrical component: 2-C
  8. M2 load check
    • Check code: 41
    • Multi code: 1, 2, 3
    • Control signal: BASEB CN24E-1 to 5
    • Location of electrical component: 3-K
  9. Replace SW4.
  10. Replace CL1.
  11. Replace M2.
  12. Replace CPUB.
  13. Replace BASEB.

(Link to the Field Service Manual)