Versant 80 no cyan

[alextech]

hi there

I have a Box where Cyan is Missing. When i came to the Machine, i noticed that some of the Drumsurface was gone and refound it on the Developers magnetic roller.
The Developer and Drums are replaced now, but it still not prints Cyan.
The Strange thing is, that i have no Errorcodes at all, machine thinks everything is as it should.

Any sugesstions where to start?


Here some Testprints:

From the Bad Machine (Cyan only Test):
v80_bad.jpg

From a good Machine (Cyan only Test):
v80_good.jpg

CMYK Pattern from the Bad Machine:
v80_cmyk.jpg

I have not checked the Drum/Developer gears from the backside yet, but i think its the direction to go because when i print the Testprint, where cyan should be its completly white, so i guess its not a HV Story.

Maybe someone knows that Picture and can save me a lot of time


alex

[JR2ALTA]

Re: Versant 80 no cyan

make a mark on the drum and developer roller. if the mark doesn't move you have no drive. If it does move I would like at the laser or halftone-pwb

[alextech]

Re: Versant 80 no cyan

make a mark on the drum and developer roller. if the mark doesn't move you have no drive. If it does move I would like at the laser or halftone-pwb

[adriansto]

Re: Versant 80 no cyan

This is what manual says:

• 091-929: Drum C CRUM Not Position.
  
  No mention about MCU. Simply replace the drum if everything you checked was ok.

[alextech]

Re: Versant 80 no cyan

This is what manual says:

• 091-929: Drum C CRUM Not Position.
  
  No mention about MCU. Simply replace the drum if everything you checked was ok.

First of all, thanks for your reply adriansto!

Did that serval times. Even Swaped inside same Machine. With other Colors the Drum works perfectly.

I have this in my Man:

091-929.jpg

The Problem is, that you not really get easy to the connectors at the rear of the Drum AND in the consumables the Drum shows up with its remaining lifetime (tested 3 drums and the value changes..).
The Error disapered now also, so i think its the wrong direction.

Did some more searching and printing, after some time all cyan was gone from the testprints:
nocyan.jpg
Then i tested if the Tonerdispenser is working:
tonerdispenser.jpg
I put a tape on it, and it was full of toner. So, thats okey.

Next i opend the Developerhousing and saw that it was almost empty. Replaced (swaped) the Developer from a working V80
and did again a Testprint:
full_cyan.jpg

Now the Page is covered with cyan exept there where it should be, there its clean and white.
Very, Very Strange.

Brings me back somehow the the PCBs i guess.

[adriansto]

Re: Versant 80 no cyan

This is pdf service manual from 2014 year. On latest edoc service manual dont mention MCU.
Tale a look at HVPS for drum charge, bias for dev assy, wires and contacts and ROS.

[xcopytech]

Re: Versant 80 no cyan

Check developer contact in machine.
You do not have developer bias

[alextech]

Re: Versant 80 no cyan

Check developer contact in machine.
You do not have developer bias

Yeah. Dont saw any

Will start at the Contacts, good idea!
keep you updated!

[alextech]

Re: Versant 80 no cyan

Here a update:

Machine is still down. I replaced the complete Dev Housing and filled with new Dev.

Controlled the Contacts, they look good. Dev is also turning...

Any Idea where to look next?

[adriansto]

Re: Versant 80 no cyan

Read about xerographic process works.

[alextech]

Re: Versant 80 no cyan

While you wrote the replay i was swapping the dev bias hvps. C/K.
Finaly the Sheet is covered with K and not C anymore and K is gone.

Searching now for some spares to replace the defective hvps, i think i have some left from a 700i, they should work.

But thanks for the asskick ;-)

[alextech]

Re: Versant 80 no cyan

Read about xerographic process works.

Love to ask stupid questions as you know:
Where you got that picture from? Was searching my man up and down to know which one is k and C.

[adriansto]

Re: Versant 80 no cyan

Love to ask stupid questions as you know:
Where you got that picture from? Was searching my man up and down to know which one is k and C.

From my pws edoc. There is a section with machine training.

[alextech]