imagePRESS C1 jamming in duplex

[Dimacop]

I have a imagePRESS C1 jamming in duplex
only in A3 and A4R.
the A4 do not have problems in 1000 or more copies
I put the drive on another machine and it worked perfectly
someone already faced this ploblema

all help and tips are welcome

Thank you and good luck

Roberto

[SCREWTAPE]

I have a imagePRESS C1 jamming in duplex
only in A3 and A4R.
the A4 do not have problems in 1000 or more copies
I put the drive on another machine and it worked perfectly
someone already faced this ploblema

all help and tips are welcome

Thank you and good luck

Roberto

A jam code would also help to know.
Are you a end user or a tech?

[Dimacop]

Tech'm actually this machine is with a friend in another country
I will ask the code jam

[zoraldinho]

Do you try with diferent tipe of paper.

[kajsa39]

The side to side reg sensor in the duplex has a mylar on it, this comes lose and tends to either jam A3 sheets or Turn the corner over 0r even both.
I would replace the sensor with the new type, sorry can't find number at the moment.

PS don't remove mylar as this just makes the problem worse.