Lexmark W850 light prints

[mascan42]

I have a pair of these at the same customer with the same problem. The prints are light over the entire page, image is also light on the drum. The customer tells me they had this problem about a month ago also, and replaced the drum units which solved the problem for a short while but then it went back to light prints. I assume this is a toner supply issue, but I have trouble believing it would happen on two machines in the same office. What else could be happening?

[Phil B.]

Re: Lexmark W850 light prints

I have a pair of these at the same customer with the same problem. The prints are light over the entire page, image is also light on the drum. The customer tells me they had this problem about a month ago also, and replaced the drum units which solved the problem for a short while but then it went back to light prints. I assume this is a toner supply issue, but I have trouble believing it would happen on two machines in the same office. What else could be happening?

1) laser is dirty/failing
2) compatible drums/toner
3) transfer roller defective

what have you done to fix?
what are the page counts?
any error displayed?
do you have the manuals?

[mascan42]

Re: Lexmark W850 light prints

1) laser is dirty/failing
2) compatible drums/toner
3) transfer roller defective

what have you done to fix?
what are the page counts?
any error displayed?
do you have the manuals?

1. Replacing the drum unit (including developer) temporarily solved the problem, so it's not that.
2. They're using genuine toner & drums.
3. The image is light on the drum, so it's not transfer.

There aren't any codes, the meter can't be read because the menus are locked out by a password that the customer doesn't remember, and the manuals are completely unhelpful.

Like I said, it's clearly a toner supply issue, since replacing developer solved it for a week or so before it started to degrade again, but I don't understand both machines having the same problem.

[Phil B.]

Re: Lexmark W850 light prints

1. Replacing the drum unit (including developer) temporarily solved the problem, so it's not that.
2. They're using genuine toner & drums.
3. The image is light on the drum, so it's not transfer.

There aren't any codes, the meter can't be read because the menus are locked out by a password that the customer doesn't remember, and the manuals are completely unhelpful.

Like I said, it's clearly a toner supply issue, since replacing developer solved it for a week or so before it started to degrade again, but I don't understand both machines having the same problem.

Meter should be on config page...

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[mascan42]

Re: Lexmark W850 light prints

Meter should be on config page...

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Doesn't matter. The reports menu is password locked.

[Phil B.]

Re: Lexmark W850 light prints

Doesn't matter. The reports menu is password locked.

have you cold booted into Diag Mode?

[mascan42]

Re: Lexmark W850 light prints

have you cold booted into Diag Mode?

I'll try that, but I think we've slightly gotten off topic.

[Woxner]

Re: Lexmark W850 light prints

might be hv board. these failed a lot on lexmark.

[Phil B.]

Re: Lexmark W850 light prints

I'll try that, but I think we've slightly gotten off topic.

Diag Mode allows you to check Bias readings etc.. I THINK you can print config/test pages also..

so not totally off topic..

and yes.. not on THIS model (for me) but similar models the HVPS and wires going to trans roller suck shit.

the Dell model (B6470?) of the Lex was KNOWN for the HVPS and harness failing.

if you don't have the manual .. PM me I do have it. ( besides tons more )

[Lance15]

Re: Lexmark W850 light prints

the Dell model (B6470?)

7330
or
IBM InfoPrint 1985

[Phil B.]

Re: Lexmark W850 light prints

7330
or
IBM InfoPrint 1985

Not his model.. was a shitty drum/dev combo.. mono mfp type


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[dalewb74]

Re: Lexmark W850 light prints

given the age of the printers isn't it time for a new machine?