mp 9000 headache

[vargue]

hi i have mp 9000 do sc440 first i cleaned transfer unit and running good after two months .no respons i replaced transfer belt. and works good. today customer call me it's revealed in a3 only. i suspect is paper moisture i maked one copy a3 and code pops up. i taked the same paper and put it again in that tray and exit without any code. threre is some way to turn off moisture sensor. or any clue please

[Bantams]

If its the Paper and if its like the MP8000 range it could be as simple as Connecting the Tray Heaters as they don't come plugged in on the MP8000 range.

[imaginemoko]

MP 9000 (Katana) ? most of i encounter the transfer harness is cut (one of wires)