Making Checks On The Printer Side (Checking The Density Slope); Making Checks On The Printer Side (Checking The Solid Black Density) - Canon iR7086 Series Service Manual

Chapter 14

14.1.3 Making Checks on the Printer Side (Checking the Density Slope)

iR7105 / iR7095 / iR7086
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.

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

iR7105 / iR7095 / iR7086
14-2
Check the image using PG6.
Is there
NO
difference in density
between front and
rear?
YES
NO
Is it lighter at the rear?
YES
Turn the adjusting Turn the adjusting
screw at the front of screw at the rear of the
the primary charging primary charging
assembly assembly
counterclockwise. counterclockwise.
(2 turns max.) (2 turns max.)
Execute potential
control.
Turn off and then on the power
switch, and generate PG1 or PG4
(test print).
Go to
"Checking the Solid Black Density"
F-14-3
0010-9296
0010-9297