Problem with Imaging

i have this problem since 1 month ago, i started having this just sometimes, when it happened i just reimaging in same plate and everything was good again but, it is now happening everytime i burn, i get aprox. 1/8 inch with no image in the 9 diode (attached image)

http://img594.imageshack.us/img594/8747/withactive9diode.jpg

when i declare 9 diode dead everything get fixed and i can work as usuall
(attached image)

http://img15.imageshack.us/img15/5493/9diodedead.jpg



Problem No.2

not that usuall i get image of plates moved, it variates everytime color and position of moved color from 0.01 to 0.05 aprox (just up and down) it does not move large of image or left-right but i get this aprox 1 plate every 5-6 burn or when i start using machine at morning before 1 day or more without using it

any idea of what could be happening?

Thanks

i think your problem is abit of dried ink on the lens above diode "9".

Clean the lens with alcohol, then water and try to reimage.

(Try dabbing the lens clean, rubbing may result in scratching if there is something between the glass and your cloth)

If it is something on the lens it would effect the whole zone of the diode.

"exactly Marc, i have cleaned it several times and nothing happen, btw its a perfect non-printed line so it doesnt seem like false contact i guess the problem is with the logic board but im not sure i would like to hear some ideas first anyway thanks fo the suggestion mightyandy "

Yes, it could be LMD (Black Box) problem with the only one channel from all eight. Just interchange it with another one BB and you will see if your problem has moved or stayed.
Jan

As Jan stated it is possible you have a Laser Drive Module working intermittently. Sometimes when they start to go bad it only affects 1 diode. If room temperatures are over 23 Celsius it can cause the issue.

As for your other issue, it could be from the plate take up spool overruning clutch starting to wear. There is a one way bearing responsible for the take up clutch spool. If the bearing starts to slip the plate material will move very slightly causing the front to back issue you are having. You notice it worse after the press has been setting for a few days because it has more time to move.

My recommendation is to have a technician come out and replace this item as it is moderately difficult if you have never done it before.

well time passed and i revived diode again and everything seems to be working good i dont really know what happened but it fixed by itselfs lol i hope this problem doesnt come up again thanks anyway