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P-9 (bizhub 750i)
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Contents
Malfunction type | Drum/Development unit (K) failure |
Malfunction code | P-9 |
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/K -Developing unit/K -IDC sensor/Fr (IDCS/Fr) -IDC sensor/Rr (IDCS/Rr) -Base board (BASEB) -High voltage unit (HV) -Transfer belt unit |
Procedure
- Check the setting value in [Max Image Density Adj] of [Service Mode] -> [Imaging Process Adjustment] and, if it is negative, readjust.
- Check the drive transmission portion of the drum/developing unit and correct as necessary.
- Clean the IDC sensor/Fr (IDCS/Fr) or IDC sensor/Rr (IDCS/Rr) window if dirty.
- Clean the contact of the drum/developing unit connector if dirty.
- Check the connector between HV CN1-BASEB CN26E, HV CN2-BASEB CN21E for proper connection.
- Replace the drum unit. (Part# ACV80RE)
- Replace the developing unit. (Part# ACV803D)
- Replace the transfer belt unit. (Part# AA2JR73100)
- Replace HV. (Part# ACV7M40600)
- Replace BASEB. (Part# ACV7H02101)