Page 1
Service Bulletin
SB Number:
SB 2KA-008
Creation Date: 16/11/2010
Paper jam J31/J4X due to wrapped paper around the primary
Subject:
transfer belt
Model: FS-C8500DN
Phenomena The paper may be wrapped around the Primary transfer belt after the primary transfer process.
Under this condition paper jam J31 (Misfeed around the transfer belt) or paper jam J4X
(Misfeed in the fuser section: X is the paper feeding source number) may be displayed
depending on the properties of the paper (Weak stiffness, Upward curl, Thinness).
Paper jam details Paper jam J31 will be displayed when the leading edge of the paper is wrapped around the
primary transfer belt.
Paper jam J4X will be displayed when the folded paper is wrapped around the Primary transfer
belt with the separation failure in the middle section of the paper while the leading edge of the
paper enters into the front of the fuser section. (Refer to page 2 for the examples of the above
mentioned paper jams)
Depending on the paper wrapping condition, the paper jam indication may disappear by opening
or closing the cover (Even if the paper is not removed). In case the drive continues under this
condition, the paper may enter the inner part of the Primary transfer belt and then the cleaning
failure at the Primary transfer belt may occur.
Solution To prevent the above mentioned paper jams and the wrapping of the paper around the Primary
transfer belt, the paper separation lms have been afxed between the guide pulleys at the
left side of the Primary transfer belt.
The paper separation lm (3 sheets of the lm guide belt B) and the instruction leaet (B)
have been bundled with the service part Primary transfer belt unit and the MK kit A.
Parts
No. Old Parts
No.
1 302KY93151
2KY93151
2 ------------ 302H721680
Part notes: *2. Parts transfer belt H unit/Parts transfer belt unit: 3 pieces of the lm guide B are afxed.
Classication
Field measure When the above mentioned phenomena occur, install the bundled guide pulley and afx the paper
New Parts
No.
302KY93152
2KY93152
2H721680
Entire stock rework
separation lm after cleaning the surface under it with cleaning alcohol. Check afterwards that the
paper separation lm does not make contact the primary transfer belt.
Description Q’TY Interchange-
ability
Old New Old New
PARTS TRANSFER BELT UNIT 1 1 X O O
+FILM GUIDE BELT B (*2) - 1 - O -
In-eld modication at next visit
In-eld modication by case
X
No modication necessary
SP
KMIS Service Department, Kyocera Mita Europe A283 / SB 2KA-008
Page 1 of 3
Page 2
Service Bulletin
Serial numbers of affected machines
Type Serial number
FS-C8500DN QXT0901040
Machines produced after the above mentioned serial number, should not have the above mentioned phenomena.
Old condition: Cross section of the left side of the primary transfer belt.
Guide pulley
+ 8.75mm
Serial numbers of affected units
Type Serial number
MK-880A for the FS-C8500DN Not available
New condition: Cross section of the left side of the primary transfer belt.
Film guide A/B
Guide pulley
+ 1.35mm
The narrow space between the primary transfer belt and the guide pulley
due to the added paper separation lm (Film guide B) prevents paper from
wrapping around the primary transfer belt..
KMIS Service Department, Kyocera Mita Europe A283 / SB 2KA-008
Page 2 of 3
Page 3
Service Bulletin
Example of paper jam J31 (Misfeed around the
primary transfer belt)
Example of paper jam J4X (Misfeed in the fuser
section)
When the paper is wrapped around the upper side of the Primary transfer belt, the machine will indicate that one of
the above mentioned paper jams has occurred. In the case that the cover is opened and closed, the paper jam
indication will disappear while the paper is still wrapped around the Primary transfer belt. If the drive continues under
this condition, the paper may enter the inner part of the Primary transfer belt and the cleaning failure at the Primary
transfer belt may occur.
New condition of the FS-C8500DN with the added Film guide belt B (B in the image below)
0.5mm
0mm 0.1mm
0mm
B
0.1mm
0.5mm
0mm
0mm
B
View from the left side of the primary transfer belt unit
Guide pulley
1
0.5mm
1mm
0mm
1mm
B
1
Film guide belt B specications
Film guide belt B
External size: 28.5mm X 38mm
KMIS Service Department, Kyocera Mita Europe A283 / SB 2KA-008
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