Sharp ARM450

[JDE75]

I have copies dark at the bottom shading even though drum and developer have been replaced. Already cleaned laser unit. Any suggestions????

Thanks in advance
Jamie

[choicecopyguy]

Check the mag roller on DV unit, it will get coverd in buildup. Gently remove with a fine 3M pad.

[blackcat4866]

Have you tried running engine prints in simulation 64? If engine prints look good you can be certain that it is a scanner issue. For example, uneven light output from the exposure lamp, or mis-aligned white plate for the CCD (run a two sided copy: if one side is OK and the other is shaded you can be sure it is the white plate alignment.).

If the engine print has the same problem perhaps a dirty thermistor is causing elevated fuser temperature and toner transferring from the dirty fuser to the copies. Is the cleaning auger intact (not twisted off)? It may look OK but when the male coupler is turned the auger may not.

[JDE75]

Thanks for your help, the pad did work and the customer still hasn't calle dback in. Thanks again for all of your help.