P-9 (bizhub 950i/850i)

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Contents

Malfunction type	Drum/Development unit (K) failure
Malfunction code	P-9
Malfunction detection timing	A- ll 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)Base board (BASEB) – High voltage unit/1 (HV1) – 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 IDCS/Fr window if dirty.
4. Clean the contact of the drum/developing unit connector if dirty.
5. Check the connector between HV1 CN1-BASEB CN9E for proper connection.
6. Replace the drum unit.
7. Replace the developing unit.
8. Replace the transfer belt unit.
9. Replace HV1.
10. BASEB F12E or F13E conduction check.
11. Replace BASEB.

(Link to the Field Service Manual)