Uneven Image Density At The Front Side And The Rear Side Due To The Difference Of The Hight Of The Primary Charging Wire - Canon imageRUNNER ADVANCE 8105 Series Manual

Symptom
Uneven image density at the front side and the rear side due to the difference of the hight of the
primary charging wire
[ Inspected by Canon Inc. ]
Description
Image density was different between the front side and the rear side. The following sample is a black solid
test print showing that the density at the rear is high.
Cause
The height of the corona wire of the primary charging assembly was uneven.
Field Remedy
1) In service mode, Mode List > COPIER > Test > PG, and enter "5" in TYPE. Output a halftone test print.
2) Check the density of the test print at the front side and the rear side. Go to either step below according to
the density.
a) When the image density at the front side is high [A]:
a-1) Turn the resin screws [1] and [2] 360 degrees clockwise to adjust the height of the primary charging wire.
[Caution] Since uneven density might occur, be sure to adjust by turning the 2 adjustment screws [1] and [2]
with the same amount.
a-2) Perform steps 1) and 2) to output a test print again to see the density. When the density at the front side
is high, execute steps a-1) and a-2) until the density becomes even, and then go to Step 3).
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