Large Color Displacement Suddenly Occurs In The Vertical Scanning Direction - Canon imageRUNNER ADVANCE C5000 Series Technical Workbook

Symptom

Large color displacement suddenly occurs in the vertical scanning direction

Description
Large color displacement suddenly occurred in the vertical scanning direction during printing on several tens
to several hundreds of sheets.
Indicated by [1] is the paper feed direction.
Cause
Stick slip (variation in frictional force) occurred due to the difference in frictional speed between the drum
and the ITB or other factors. Accordingly, the speed of the ITB became uneven, resulting in color
displacement.
[Reference] Color displacement may also occur because of changes in outside air temperature/ temperature
increase inside machine/ machine relocation.
Field Remedy
Perform the following steps on the premise that the previous measure against mottled blank on image when
using papers of rough surface (reducing the thickness of ITB/increasing ITB tension/decreasing pressure of
the primary transfer roller) were taken and the system software was upgraded to Ver.70.09 (DCON
Ver.66.05) or later.
1) In Service Mode > Mode List > COPIER > Adjust > FEED-ADJ > TBLT-SPD >, set "4". The setting range
is "-8" to "8". Increasing the setting value by "1" increases the speed of the ITB by 0.025%. (Default value: 0)
[Caution] By changing the setting value to "4", the leading edge margin becomes small and the magnification
in the vertical scanning direction becomes large. If this may cause any trouble in the use by the user, make
the following change.
- To change the leading edge margin, change the setting to a positive value in Service Mode > Mode List >
COPIER > Adjust > FEED-ADJ > "REGIST". The setting range is "-50" to "50". Changing the setting value by
"1" changes the leading edge margin by 0.1 mm.
- To change the magnification in the vertical scanning direction, log in to the system management mode and
then duplicate the paper type to be used. Further, in Preferences > Paper Settings > Paper Type
Management Settings > Details/Edit > Adjust Image Position > "Fine Adjust Zoom", change "a" to a negative
value. The setting range is "-1.00" to "1.00". The setting value can be changed by 0.01%.
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