FO-2080 Undertoned

[spanky]

I have an FO-2080 that will keep undertoning about every 200 images.
It is used only for faxing so it is all print and no pictures.
The first time I replaced the toner cortridge thinking it was not adding toner properly or the toner density sensor was bad.(I also replaced the drum unit)
The next time I replaced the MCU PWB since the toner density sensor is read by it and the toner add motor is controlled by it.
I know the toner motor is good since I keep toning up the developer with simm 10 which runs the toner motor.
After toning up the developer I get good prints.

Machine has 12K images on it.
I have stopped the machine during the copy cycle and found no excess toner on the drum.
I have stopped the machine just after the copy cycle and found no toner on the drum.
There is no toner or developer accumulating in the machine.

HELP!!

[Akitu]

Re: FO-2080 Undertoned

I had an FO-2080 doing the same thing, except mine was in a kitchen right beside a meat slicer. They really don't fare well with humidity, I would attribute it to a weak procon system. They wound up getting a new machine because they refused to remove it from the kitchen.

I would investigate environmental factors in your case. Make sure it's operating within an acceptable range for humidity according to the service manual.

[spanky]

Re: FO-2080 Undertoned

It is in an office setting about 10 feet from an MX-3110N that is operating properly.

[Akitu]

Re: FO-2080 Undertoned

That 3110 has a much better procon system than a dinky little FO-2080. I would still advise checking the RH in that office to see how it's doing.

[spanky]

Re: FO-2080 Undertoned

The humidity is good at the office.

They do not turn off or back the A/C or the heat.