Making Checks On The Printer Side (Checking The Solid Black Density) - Canon ImageRunner iR8500 Series Service Manual

1) If the difference in density still exists after giving the adjusting screw 2 turns (one side; a full turn causes a change of about 0.7 mm), check the charging
assembly, scanning lamp, and scanner for dirt.
2) When giving it a counterclockwise turn, be sure that the distance between wire and grid will not be 7.5 mm or less.
MEMO:
Moving the wire from the photosensitive drum causes the images to be darker; while moving it closer causes the images to be lighter.

14.1.5 Making Checks on the Printer Side (Checking the Solid Black Density)

iR105i/iR105+ / iR9070 / iR85+ / iR8070
Check the image using PG6.
Is there
difference in density
between front and
rear?
YES
Is it lighter at the rear?
YES
Turn the adjusting
screw at the front of
the primary charging
assembly
counterclockwise.
(2 turns max.)
Execute potential
control.
Turn off and then on the power
switch, and generate PG1 or PG4
(test print).
NO
Go to
"Checking the Solid Black Density"
NO
Turn the adjusting
screw at the rear of the
primary charging
assembly
counterclockwise.
(2 turns max.)
F-14-4
Chapter 14
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