KONICA 7135 jams when duplexing A3 size paper

[LY3IJ]

KONICA 7135 jams when duplexing A3 size paper
a4, a4r runs fine
replaced M6 motor- the same
new to this model please help

[Albonline]

is this unit on a stand? large paper travels under tray 2 when duplexed , is there any thing interfering with its path?

[LY3IJ]

is this unit on a stand? large paper travels under tray 2 when duplexed , is there any thing interfering with its path?

yep its on stand with 2 lower drawers
first side is copied ok and then jam in both doors upper and lower
cuold not see anything interfering with paper...
it goes easily when i move it by hand

[mrwho]

What JAM code are you getting?

[pepper38_cnd]

If it has drawers it is a DB not a stand. The DB is part of the paper path when duplexing. Longer paper actually feeds under the DB then back up. At the bottom of the DB there is a metal slot for the paper to feed into. There is a mylar glued to the slot entrance, if this mylar has been damage long paper will mis-feed while shorter paper feeds fine. Check the mylar if it is damaged just peel it off and clean the glue from the guide, I have found they will run fine without this mylar.

[HuronMan]

Like mrwho said, codes? How many copies? Had probs duplexing when the paper exit actuator(26NA53170) gets worn down. Same with the reversal actuator 26NA50071.

[LY3IJ]

FINALY GOT BACK TO THIS ...
it jams every time making a3 2sided copy with code 97-2
and making strange noise...
a4 and a4r runs fine

[mrwho]

Something for you to check:

DESCRIPTION: J97-2 occurs when duplexing.
CAUSE: The actuator for PS4 (ADU PS) is binding.
SOLUTION: Check the actuator for PS4 (p/n 26NA50070) for binding. Replace as needed.