Definitely start with replacing the charge wires and grid. Then, you need to figure out why it's only lasting 20k.
Definitely start with replacing the charge wires and grid. Then, you need to figure out why it's only lasting 20k.
Wow! Thanks for replies. I didn't expect that much.
I wont say i have a toner dusting. It have some toner on transver belt ends but as much as you expect at 20k copies, and nowere else. When i clean that toner it gets much better, but still not near good. As i said i change a whole corona unit with new grid and wires and nothing happens. It's not the scanner as i have this problem on counter printout.
I can't belive that the transver belt unit gives this problem, but everythig is pointig at that. Next time when this shows up i'm going to reconnect a transver belt connector, or just clean that unit and see what's happening.
I take this machine 50k ago to our service and disassambled it to smallest peaces. Change some paper transport gears, whole developer unit gears and bushings, developer, cleaning brush, blade, transver cleaning blade, belt, drum, every developer seal, charge corona... Machine works perfectly, and i really mean perfectly for 20k. But And again 18k. But
I'll check bias bearing as tcs04 recommend and transver belt unit.
I just don't know what else can it be.
Tnx for all answers...
I have to agree with Imind. You have listed parts replaced, and the cleaning brush was not one of them. A worn and/or toner caked brush could cause a copy like this. TIme to bring this customer into the 21st century. I haven't had to work on an A175 in years.
One more thing. If I remember right, the development unit mag roller shaft goes into a bearing mounted in the rear frame. I think I used to have a problem with the bearings locking up and damaging the shaft causing copy quality problems.
NEVER ASSUME ANYTHING
am just thingking... if toner is droping at the end of transfer belt... ofcourse its comes from drum. poor cleaning brush and poor pcu seals can accumulate toner... or poor pcu seals can cause the drum to touch the development seals in a long run that can cause the drum to scratch be grounded and accumulate toner... droping to the transfer belt that can also damage the transfer bias brush... if charge unit is new.. ans still same problem...development unit is new together with seals... drum....still??? how about the SP 2 xxx? have we try to reset to defaults?
fix the customer first then fix the machine... its simple and makes life more easy.
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