T
echnical
B
ulletin
PAGE: 1/9
Reissued:06-Jan-12
Model:
Taurus-C1/P1 (D074/D075/M044)
Date:
25-Aug-11
No.:
RD074020a
RTB Reissue
The item in italic was added
Subject:
Troubleshooting PTR Entrance Paper Jams
Prepared
by:
K. Tsutsui
From:
PP Service Planning Department 1G
Classification:
Troubleshooting
Mechanical
Paper path
Part information
Electrical
Transmit/receive
Action required
Service manual revision
Retrofit information
Product Safety
Other (
)
Tier 2
This RTB has been re-issued to announce the release of the special PTR Entrance
Guide Plate D0743810.
The PTR Entrance Guide Plate was modified from August 2011 production (D0746122
Æ
D0743820) to prevent the breakage of the bottom mylar (indicated in orange in the
diagram below) as announced in the original bulletin.
However, due to the following possible side effects caused by the modified guide plate
D0743820, a special guide plate D0743810 was additionally developed, which is to be
installed if the following side effects appear.
a) Uneven density in halftone images in low temp environments
b) Uneven density within approx 90mm of the trailing edge
c) Scattered line images at the front side of the trailing edge
d) Toner stains on paper edges
e) White streaks on coated stiff paper
Mechanism of the Side Effects
The side effects a) and b) are caused by the difference in the “contact surface area”
between the paper and the ITB. As shown in the diagrams below, the contact surface
area is small when the leading edge enters the PTR nip, whereas the contact surface area
is large when the trailing edge passes the transfer guide plate.
Small
contact surface area
L
arge
contact surface area
