Yellow Background bizhub c252

[alfpanasonic]

I have a bizhub c252 that make yellow copies (background) every cycle of copies. The original have all colors possible.

In test print, in gradation adjust is the same.

Any idea?

[ebm]

Does the image show wavy lines along with the background? Had a machine with a wavy magenta background pattern. Needed to replace the HV1 assembly to repair. Hope this helps.

[alfpanasonic]

No, is a solid yellow background.
I'm going to chech HV1.

Thanks

[alfpanasonic]

solved

it's laser yellow

Thank's everyone

[Scott_Lewis]

it's laser yellow

Thank's everyone

Thanks for letting us know what the solution was.

Are you saying the write unit caused this somehow?

[alfpanasonic]

laser

Yes
I change the laser yellow with the magenta and the background yellow change to magenta.

In this moment I'm waiting for the laser unit (4 laser, because i must change all the lasers

[alfpanasonic]

Laser ok

Today (27/6/2007) we change laser's and was everything ok

[TonerMonkey]

Bit late.................

A bit late on this one but I've had this before - sorry Alf I'll try and be quicker next time !!!!!!

[Bizhub]

I would only fit one write unit and keep the other three for spares.
Dont replace all four like KM recommend, you just don't need to.

[Juggy]

Hi,
I did face the same problem. The machine will produce all the colors properly with Full edge to edge Yellow background. The problem was PWB-A. Try and swop the PWB-A with a working machine and isolate the problem. Good luck

[alfpanasonic]

This problem is solved?

Anything else?