Light copies for TA 4500 and 3500

[Gab]

These machines have almost the same problem . The copies are light. I cleaned optics, charge roller at both machines At 3500 i swapted developer unit and charge roller with no result. At 3500 i execute 132 and works fine for about 300 - 400 copies and then light copies . At 4500 i have to execute 130, 132 and also darken the density to have acceptable result. But after some copies , light toner.
Toner is genuin also both machines under 200k copies. Any idea?

[toddanderson]

Clean the inside of the laser

These machines have almost the same problem . The copies are light. I cleaned optics, charge roller at both machines At 3500 i swapted developer unit and charge roller with no result. At 3500 i execute 132 and works fine for about 300 - 400 copies and then light copies . At 4500 i have to execute 130, 132 and also darken the density to have acceptable result. But after some copies , light toner.
Toner is genuin also both machines under 200k copies. Any idea?

[craigster]

I would try a new drum, even with only 200k on machine the unit is pretty old in years.

[mga]

Try replacing with new oem parts as units when needs what's the life on pm

[thish.csoffice]

Clean the inside of the laser

If the density getting lighter as u are making copies it seems like the toner hopper is not working correctly. Did u ever get an error code when copies are too light?

If yes clean the hopping unit and clean all the sensors.



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[Bix]

Clean PHUNIT