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Model:
Taurus C1/P1 (D074/D075/M044)
Subject:
Troubleshooting White Line (along the paper feed
direction)
From:
1
st
PP Tech Service Sec., PP Tech Service Dept.
Classification:
Symptom
White line appears along the feed direction.
White Line is especially noticeable with solid or 1-dot halftone images.
Possible causes
1.
Foreign substance stuck under the development unit scrapes off the image on the ITB,
causing the line to appear at the same location on the printouts.
For example, if the foreign substance is adhered to the bottom side of the C dev unit, C, M
and Y images are affected while the K image it not, due to the position of the stations (K is
at the far right).
2.
Laser beam is blocked by dirty toner shield glass.
If dust/toner is spread widely on the shield glass, the white line will appear wide, almost like
a band. If dust/toner adhered to the shield glass is small, the line will appear narrow.
3.
Foreign substance stuck in the doctor gap in the development unit causes inconsistency in
the amount of developer transferred to the drum surface.
Running the machine continuously in a HH environment can induce this symptom.
echnical
T
Troubleshooting
Mechanical
Paper path
Product Safety
ulletin
B
Date:
27-Jan-13
Prepared by:
Part information
Electrical
Transmit/receive
Other ()
PAGE: 1/6
No.:
RD074112
S. Sasaki
Action required
Service manual revision
Retrofit information
Tier2
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