If the image is good in parts, but light in others it is most often toner build up on the laser exposure glass which can be easily -but also VERY CAREFULLYremoved. If you lift the green handle for the toner bottle, you should see a narrow piece of glass protruding just underneath. You can grasp it with you fingers and slide it out for cleaning. Sometimes these have been removed (or broken) so they are not there. If the machine is also a printer, you should see much improvement (if this was the cause). If regular copying is still light in areas, then you may want to remove the copier glass - 2 screws on left scale, and 3 screws on rear scale (POWER OFF ON MACHINE), remove glass and clean with glass cleaner, then slide scanner to the left and clean the mirrors. Hope this helps.
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Hello sir; Just follow the steps;
1, dump entire dv use vaccunm cleaner to cleanup don't leave any dv inside.
2, thorughly clean out magnet roller by rubbing alcohal.
3, pour in new dv evenly.
4.Do simulation 2801 & 2805, the procedure as follow;
press"clear mode", "107", press and hold "clear/stop" key for 3 seconds, then press 1 for copier sp then enter2801 press start, after that go to 2805. same procedure. Let me know the resolve.
You're talking about two really old machines, the 450 from 1998 & the 7025 from 2000. Both are about the same class, but I'd give the edge to Ricoh since it was also sold under a number of other brands & replacement parts are readily available. Hope this helps...