Question about Canon imageRUNNER 8500 Copier
Xerox and printing
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Main Cause The laser shutter is faulty. The laser unit is faulty. The potential measurement
PCB is faulty. The DC controller PCB is faulty.
0001 As the result of potential control, the drum surface potential (VL2)
of the white background is about 200 V (generating solid black images).
0002 The primary charging output used for print output and the drum
surface potential after laser output has been made are about 200 V
Posted on Sep 08, 2009
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Posted on Jan 02, 2017
Specific potential is not required or the limiter is activated as the potential is controlled.
I beleive it is the Potential of the "drum sensor"
there is a sensor that reads the drum and adjust the machine, this may need to be adjusted, cleaned or replaced. Has to be done by a tech.
Posted on Aug 25, 2008
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