Ricoh pro c901, Technical Bulletin

Page: 428 / 586

T
echnical
B
ulletin
PAGE: 4/6
Model:
Aries-P1.5/C1.5, AG-P1/C1, AGL-P1/C1
Date:
29-Nov-13
No.:
RM077099
Image quality problems caused by the OPC drum
Symptom 1
Images appear unclear and fuzzy when running the machine in a high temperature and
high humidity operational environment.
Cause
In a high temperature/humidity environment, corona
products cause the lubricant powder to decompose and
ionize, which combines with moisture. In this condition,
the drum surface resistivity is reduced and dots are not
aligned as expected to properly develop the
electrostatic image.
Solution
Do #203 “Execute Photoconductor Refreshing” of the
Adjustment Settings for Skilled Operators to remove
the affected lubricant powder (decomposed and
ionized), which stays only on the surface layer.
Symptom 2
Vertical lines appear at a 314 mm interval (= drum circumference).
Cause
Scratches on the drum
Solution
Replace with a new drum.
OPC
OPC
Corona
products
Affected
lubricant
powder
The drum is protected by a layer
of unaffected lubricant powder.
Cleaning blade
OPC drum
Scratches
314mm interval
Identical
vertical lines
Paper feed
direction