Hi,
are you talking about ir 3530 b&w copier?
"Z FOLD" of jamed paper is usual when paper goes from cass. towards registration roller, and registration clutch doesnt operates.
Do you have problems with A4 double sided too?
Where does the jam occures? In wich section?
I had few cases, when the paper stucked above fixing unit in small inner door, wich guides paperout or back in duplex, for second side copying.
The problem was in spring and solenoid wich lifts the paper guide plastic with finger.
It also could be case that you need to replace paper pickup, feed and separation roller in cassete where is A3 paper, and clean other rollers.
Try to put paper in "good" cassete, from wich you do not have problems.Just swap papers, and set correct paper sizes, and if it works then the problem is 70% in rollers.
On the place where the paper stucks, clean the paper rollers, by rotating it and cleaning with alcohol or water and dry it verry well.
Hope that helped.
If you have more questions or want service manual, write on
[email protected]
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