Sharp MX3560 Repeats colours on one plain only, black perfect

[Dickie]

Background to fault is that the machine just hung and would not come to ready followed by saying finisher tray not present even though no finisher was fitted and erroring out.

Tried changing memory dimm on advice from sharp but no change, eventually changed MSATA SSD card which brought it back to life.
However the transfer belt was covered in toner and all the devs appeared depleted.
Have now re-deved the machine and black copies are perfect as are the test pages, however the colours seem to be repeating about 1mm apart but only across the width of the page , the feed direction is fine.

Anyone seen or have any ideas on this

Any help appreciated
Thanks

[mojorolla]

The IT belt unit has retrofitted pressure springs. In a pinch, a zip tie in front of the springs works just as well. The unit has no rubber roller or edge beads under the belt surface. The belt will remain still while all the components INSIDE the belt spin. Be sure to dust the belt healthily in yellow toner powder.