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black page on Canon pc 7re?

Our scout group have been given a canon pc 7re photocopier. everything works paper wise but the print is very black image of original which is just visible. before I spend anything from £49 - £100 on a new cartridge is there anything else I should check.
Bill Charnaud, May 2010
Try taking off auto to manual and experiment with different settings, starting near left hand of adjuster

N Davenport, October 2010
Check your optics and charge &/or discharge .

I'm not sure if this unit uses lamps or coronas.
If you have "sticks" with a fine wire in the middle, you can clean it off with and eraser, if lamps use alcohol and a clean cloth.

the corona wires are only microns thick so be careful.

Steve Berryman, June 2010
link Click here to see other fixes for Canon.