PRO1050 foggy background in thick paper

[Gerg?]

The life counter is 2 500 000.
New SMP KIT (PM KIT).
Firmware version is 60.
I tried to change the DipSw 27-2,3, 7-7, 7-2,3, 23-2,3,4, 8-0,1, 5-2,3. Sometime it helps with tonel spilling and to incease image density. At the moment the plain paper almost good. But with 170g/m2 has very foggy bachground the whole surface.

Any idea?

[Haroldbfix]

The life counter is 2 500 000.
New SMP KIT (PM KIT).
Firmware version is 60.
I tried to change the DipSw 27-2,3, 7-7, 7-2,3, 23-2,3,4, 8-0,1, 5-2,3. Sometime it helps with tonel spilling and to incease image density. At the moment the plain paper almost good. But with 170g/m2 has very foggy bachground the whole surface.

Any idea?

How old is the Developing unit, charge unit, and Drum?

[Gerg?]

Charge unit 2.5000k (Charge wire is new)
Developing unit 2.500K (Developer 800k)
Drum 800k

[Haroldbfix]

Charge unit 2.5000k (Charge wire is new)
Developing unit 2.500K (Developer 800k)
Drum 800k

Based on those counts I wouldnt be a bad idea replace them.

[Gerg?]

I chekked process adjustment datas. The sleeve rotation was 91 instead of 142. MPC was 96 instead of 110. I changed them for default value. The image didn't change. Resetted the DipSw to factory default, except 5-2,3 and 8-0,1.
I've replaced the drum & the developer. It works fine now. But I'm not sure to find the really good solution.

Thanks for your help.

[random]

when developer dies you get background. From what I read your dev was 800k old. I understand the dev life to be 750k. You have done well to get that far.

[Gerg?]

Develolper life is 1.000k or 220h wich comes first.

[Haroldbfix]

Develolper life is 1.000k or 220h wich comes first.

True, however keep in mind if the machine is in a "continuous print" environment you will have to replace the consumables early.

[random]

Develolper life is 1.000k or 220h wich comes first.

Assuming 6% coverage in perfect temperature and humidity conditions.