light image in mp9000

[vargue]

than x guys for help i appreciated that upper unit .have 12 or 13 drop all throw toner well.and two white augers turn well.no sluggish today i used another toner and image become more clearly than first toner. in my country suffer from bad spar parts.

[Codex]

if you dont have a SC 495, then try to clean the toner supply tubes inside the machine (rear).....near the toner supply pump, there is only ONE black tube, clean it.....and then do a TONER BANK SETUP.

[vargue]

i did toner bank it's complete very fast .and pumb not give 495 but i suspect my be it's worn

[Cipher]

Air flow around the drum area is important on high volume machines and is often overlooked by engineers.
Poor ventilation can cause intermittent blurring and deterioration of drum/dev conditions resulting in lighter prints.

I would recommend either replacing or at the very least vacing out all the filters at every drum or dev change.
There are also firmware updates that introduce SP modes for adjusting fan speed and extending fan timing.