Canon iR C3200 Series Service Manual page 793

16.3.2.3.3 Uneven density of 12mm intervals in diagonal direction/Density at the rear is light: when
continuously generating an image with a high color ratio
Symptom
When an image with a high color ratio is generated continuously, the density at the rear tends to become too
low (light). It tends to occur simultaneously with uneven density in diagonal direction at intervals of 12 mm.
Cause
The amount of toner supplied cannot keep up with the amount of toner being consumed.
Field Remedy
Set '1'or '2'to the following in service mode: COPIER>OPTION>BODY>SLV-UP.adverse effect of setting it
to'1' the life of the drum unit will decrease.
adverse effect of setting it to '2' the life of the drum unit will decrease, and the print productivity will also
decrease.
16.3.2.3.4 Uneven gloss of 155mm width along the leading edge of the 1st print: when attempting to
print an image with a high color ratio on thick paper (209g or more and coated paper)
Symptom
Uneven gloss (about 155 mm) occurs along the leading edge of the 1st print when an image with a high color
ratio is printed on thick paper (209 g or more and coated paper).
Cause
There is an appreciable difference in temperature between the 1st rotation of the fixing roller and its 2nd and
subsequent rotations (with a peripheral length of 155 mm).
Field Remedy
If prints are made continuously, the fault does not occur on the 2nd and subsequent prints.If prints are made
continuously, the fault does not occur on the 2nd and subsequent prints.
16.3.2.3.5 Flow image along the edges of the sheet: after the machine has been left alone in a high
humidity environment for a long time (e.g., 2 days)
Symptom
If the machine has been left alone in a high humidity environment for a long time (e.g., 2 days), flow image can
occur along the edges of the sheet.
Cause
The chemical elements on the surface of the photosensitive drum absorbs moisture from the atmosphere, thus
decreasing the resistance on the surface of the drum.
Chapter 16
0002-3391
0002-3398
0002-3411
16-19