ricoh 3245c dual laser alighnment

[genco]

i have a ricoh 3245c that has a 1mm image offset when printing black and white only. is there a correction to this problem? thanks,

[Eric1968]

Is the offset in main scan or sub scan direction? Does it happen during copying or printing?

[TonerMunkeh]

Have you run colour registration adjustment and ACC in user tools? First place for an end user to start. If that doesn't work, call a tech.

[genco]

hi Eric 1968, it is in the sub scan ( feed ) direction.

[genco]

hi tonerMunkeh, tried all the adjustments, sit only effects the black and white print/copy. in colour mode it is all good.

[genco]

sorry eric1968, doesn't matter print or copy.just in black and white

[Eric1968]

Can you post a scan of the problem? What's the status of the black drum?

[genco]

hi eric, when i convert from pdf or tif to jpg you can't see the problem, it's actually about a 1/2 mm offset. i have replaced pcu and dev.

[Eric1968]

When it's just a small offset, could it be that this offset falls outside the machine's specifications? I mean, halve a millimeter isn't much.

[genco]

i look after quite a few of these machines and find them quite good. never seen this issue before. if i sent you a pdf you would definitely see the problem. it make text blurred.ive always been able to manually adjust colour registrations when needed but this doesn't seem to be a registration problem, more to do with the dual beam laser in the black and white mode.

[Eric1968]

Dirty mirrors in the laser unit?

[genco]

hmmm, i have always associated dirty laser mirrors to a light print out, but i guess i will have to pull it apart to confirm either way.i can check out the laser adjustment assembly as well. thanks,

[Eric1968]

Good Luck!

[Llama God]

Sorry, I'm confused, the black text is blurred? This is on black only, not composite black?

[teebee1234]

If it's in the subscan direction then the ld unit wouldn't be the problem, it affects main scan -front to rear. The subscan is a product of the drum rotation, so I would look at the black drum/dev drive. Is the 'offset/blur' repeating itself? If so you should be able to determine what component is causing it by measuring the distance between them (print a test pattern on 11x17).