P-8 (bizhub C650i/C550i/C450i)

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Contents

Malfunction typeDrum/Development unit (Y) failure
Malfunction codeP-8
Malfunction detection timing-All density readings taken from the density pattern produced on the transfer belt are equal or under the predetermined value during max. density adjustment (Vg/Vdc adjustment).
-All density readings taken from the density pattern produced on the transfer belt are equal or more the predetermined value during max. density adjustment (Vg/Vdc adjustment).
Relevant parts-Drum unit/Y,M,C,K
-Developing unit/Y,M,C,K
-IDC sensor/Fr (IDCS/Fr)
-IDC sensor/Rr (IDCS/Rr)
-Base board (BASEB)
-High voltage unit (HV)
-Transfer belt unit

Procedure

  1. Check the setting value in [Max Image Density Adj] of [Service Mode] -> [Imaging Process Adjustment] and, if it is negative, readjust.
  2. Check the drive transmission portion of the drum/developing unit and correct as necessary.
  3. Clean the IDC sensor/Fr (IDCS/Fr) or IDC sensor/Rr (IDCS/Rr) window if dirty.
  4. Clean the contact of the drum/developing unit connector if dirty.
  5. Check the connector between HV CN1-BASEB CN26E, HV CN2-BASEB CN21E for proper connection.
  6. Replace the drum unit. (CMY Part# ACV80TD / K ACV80RD)
  7. Replace the developing unit. (C Part# ACV80KD, M Part# ACV80ED, Y Part# ACV808D , K Part# ACV803D)
  8. Replace the transfer belt unit. (Part# AA2JR73100)
  9. Replace HV. (Part# AA7NM40601)
  10. Replace BASEB. (Part# AA7NH02102)

L.2.8 (Link to the Field Service Manual)