CQ Bizhub C280 image repeat on card stock

Hi All,

I have a customer with a C280 Konica, The machine works fine until the try printing on 209gsm card.

I then get an image repeat on the card, so far i have changed the fuser (twice) enabled the cleaning mode (still ng) fitted a new transfer belt and roller still no good.

even if i whack the machine up to thick 4 (300gsm) i still get the problem, it is like a drum memory or charge problem but i have also changed the drums and dev units.

any one had this problem?? solution??

please let me know as i am stumped apart from trying an HVT.

many thanks