abnormal print: 6fault print/36print on 2901

[lcd]

pls. advise me if you face with problem like this for qss2901: print from film and file has some abnormal print: some strike(with yellow or violet) across the print. abnormal print frequency: around 6 print / 36 print. this m/c was upgraded for main, but after upgarding, it can work well, after around 3 week normal working, it got the problem. sometime, m/c has main control error. but I've faced many time for this error and never see this case, is there any noise around? supply voltage is fixed 220V. Do you used to face this error? any PCB abnormal?... pls. advise, thanks

[Dave S]

Do you ever get this on the images burnt to CD from negative?

If you do it's likly to be an image processing PCB fault.

If you don't, at a guess I would say it is the drive voltage PCB (J390638-00) or the data output PCB (J390608-00) for the MLVA.