Magenta lines on copies any ideas

[outdoorkatie123]

Hi anyone ever have this fault everything colour has magenta lines covering the copy but there is no magenta in the copies
if i run a calibration the magenta is missing
if i do a one colour magenta the copy is blank apart from the magenta lines

[blackcat4866]

Re: Magenta lines on copies any ideas

It would be nice to see a sample. Something like this:
And it might help to know what model that you're referring to. =^..^=

[outdoorkatie123]

Re: Magenta lines on copies any ideas

SAMPLE COPIES-5.jpgSAMPLE COPIES-4.jpgSAMPLE COPIES-3.jpgSAMPLE COPIES-2.jpgSAMPLE COPIES-1.jpg
Hi here are some of the sample copies i took whilst on site
everything copied or printed in colour has magenta lines all over the page
already replace magenta drum and dev unit primary transfer belt hv board and main power supply

[blackcat4866]

Re: Magenta lines on copies any ideas

If your copier has a charge roller (or four), I would start with cleaning the magenta primary charge roller.

I still don't know what model copier you have. =^..^=

[copykat93]

Re: Magenta lines on copies any ideas

I agree about the charge roller cleaning, clean water on a cotton cloth and clean the charge roller

BUT...YEAH!!.... sure would be nice to know what model machine you need help with

[outdoorkatie123]

Re: Magenta lines on copies any ideas

Hi guys the copier is a UTAX 3206
ive already replaced the complete drum unit which comes complete with charge roller also replaced magenta dev unit and primary transfer belt
Although all colour copies have the magenta lines there is no magenta in the actual copies
if you look at the sample calibration the magenta square is missing
thanks

[copykat93]

Re: Magenta lines on copies any ideas

hmmmmmm.... what does that convert over to in a Kyocera?

[outdoorkatie123]

Re: Magenta lines on copies any ideas

TASKALFA 2552ci

[blackcat4866]

Re: Magenta lines on copies any ideas

Is the little gray button staying pressed in on the developing unit?
Is the laser slit glass clean?

Less likely: perhaps the magenta primary transfer roller is not shifting correctly, maybe popped out of it's bushings?

Have you emergency stopped the machine to determine if you have a good latent image on the magenta drum? ... on the primary transfer belt? =^..^=

[PrintWhisperer]

Re: Magenta lines on copies any ideas

My guess is LSU magenta laser drive is fubar. Note existing deletion edge indicating good charge and no defect where laser does not write to.

This is why bias components had no effect. Loupe examination of defect should show some level of dot pattern.

[BillyCarpenter]

Re: Magenta lines on copies any ideas

Hmmmm....I'm torn between PrintWhisper and Blackcat's solution.

[outdoorkatie123]

Re: Magenta lines on copies any ideas

Is the little gray button staying pressed in on the developing unit?
Is the laser slit glass clean?

Less likely: perhaps the magenta primary transfer roller is not shifting correctly, maybe popped out of it's bushings?

Have you emergency stopped the machine to determine if you have a good latent image on the magenta drum? ... on the primary transfer belt? =^..^=

Already replaced primary transfer belt and the dev unit doesnt have the little grey button

[outdoorkatie123]

Re: Magenta lines on copies any ideas

Problem solved turned out to be faulty Engine pwb

[copykat93]

Re: Magenta lines on copies any ideas

That is weird... but so glad you found the issue & shared it with us. Have a great day!

[PrintWhisperer]

Re: Magenta lines on copies any ideas

Problem solved turned out to be faulty Engine pwb

Good job parsing LSU drive signals, you should also carefully check the waste toner bottle is turning without obstruction.

This is because the Engine PWB->Laser APU connection includes a 24v line to supply LSU cleaning motor.
This voltage is also used to drive the WT motor. If there was an overcurrent due to mechanical binding that could have zapped it.