Ricoh B051 Service Manual page 869

Tech Service Bulletin No. B051/B052 – 014 REISSUE
SYMPTOM:
Uneven image density (KMCY) from lines or scratches on the OPC belt
up as lines in image areas, which correspond to the positions of lines on the OPC or ITB. This symptom
does not involve much toner dropping from the Development unit to the LD unit toner glass shield, and can
be attributed to a PCU failure.
CAUSE:
Additives from the paper can be transferred onto the OPC surface via the transfer belt, which can cause the
OPC surface to become slightly rough or uneven and develop a cloudy film. In addition, the rough surface of
the image transfer roller can cause roughness on the rear side of the ITB, which can in turn be transferred to
the OPC surface.
SOLUTIONS:
Production Countermeasure:
The following were applied from August 2003 production:
A cleaning blade has been added to the ITB cleaning section to remove any additives on the ITB
surface.
The surface coating for the image transfer roller has been changed to stainless steel to ensure the ITB
is not scratched.
NOTE: A cloudy film on the OPC surface alone does not trigger this symptom, therefore in such a case
there is no action required.
P/N change:
B0519100 → B0529100.
PCU
Field Countermeasure:
Refer to this Technical Service Bulletin for the troubleshooting.
-
Refer to TSB B051/B052 - 030 for the action necessary when installing the new and old PCUs in the field.
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA
(Sample 2). The uneven ID shows
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