Adjustment Of The Transfer Unit - Toshiba e-STUDIO2020C Service Handbook

3.10 Adjustment of the Transfer Unit

3.10.1 Adjustment of the transfer belt due to environmental factors
The length of the transfer belt may change depending on the environmental temperature and humidity,
and this will cause change to the leading edge position of the image.
Although image position adjustment has been performed at factory shipment, when the equipment is
installed or any part is replaced, it is necessary to check the difference between the "05-4732-0:
Reference value" and "05-4732-1: actual value" of the "Displaying corrected values of leading edge
adjustment", because there may be a difference between the environment of the factory and that of the
installation location. If the difference between the reference value and actual value is 10 bits or more,
be sure to perform "Image location adjustment of secondary scanning direction (05-408)".
• The equipment automatically corrects the change in the leading edge position caused by any
environmental change. However, readjustment for the leading edge position in the installation
environment (i.e. obtaining the reference value) can make the automatic correction even more
precise, since it can suppress inconsistency caused by the dispersion of units, parts and sensors.
• A difference between the reference value and actual value may occur even if the equipment has not
been moved. However, you do not have to perform "05-408" every time a difference is found, if it has
already been performed after installation of the equipment or replacement of parts.
Code Adjustment item
4732-0 Displaying corrected values of
leading edge adjustment
Absolute humidity reference
value
4732-1 Displaying corrected values of
leading edge adjustment
Absolute humidity actual
value
408 Image location adjustment of
secondary scanning direction
Note:
When checking "Displaying corrected values of leading edge adjustment (05-4732-0), (05-4732-
1)" and "Image location adjustment of secondary scanning direction (05-408)", be sure to do this
in a few hours after the equipment has been installed or any part has been replaced.
The length of the transfer belt changes slowly according to the environment, so the larger the
environmental change is, the longer it takes the belt length to become stable. And if you perform
this adjustment immediately after installation or replacement work, the adjustment value may not
be proper, and therefore, deviation in the leading edge position is likely to occur when the
equipment becomes stable.
e-STUDIO2020C/2330C/2820C/2830C/3520C/3530C/4520C
ADJUSTMENT
Remarks
Displays the absolute value of the corrected value of the
leading edge adjustment
Displays the actual value of the corrected value of the leading
edge adjustment
Performs the image location adjustment of the secondary
scanning direction (laser writing start position adjustment)
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