Light - Canon imageFORMULA P-208 Service Manual With Parts Catalog

4) The value to adjust is changed by directly
entering in the data box or by using the
scroll arrows. This amount of additional
change is added to the value previously
set by the
For example, if the value is already [0.4],
then enter [-0.6] if you want to add 1mm to
make the reading start 1mm earlier, or
enter [1.4] if you want to subtract 1mm.
Note: The input values range from -5.0 to
5.0.
5) If the [Apply] button is selected, the value
is saved, and if the [Cancel] button is se-
lected, it is not saved.
Figure 5-228
6) Execute a scan test and check the posi-
tion.
COPYRIGHT © CANON ELECTRONICS INC. 2012
automatic adjustment.
CANON P-208 FIRST EDITION
CHAPTER 5 TROUBLESHOOTING

3. Light

This mode performs fine adjustments on
the shading correction values since the
reading point differs between the white ref-
erence sheet inside of the reading unit and
the actual document.
If the scanned image quality is degraded,
perform this adjustment. Also perform this
adjustment after replacing the reading unit
or after replacing the control PCB recording
the adjustment data.
This mode can be used together with
other adjustment items. For details, refer to
"All".
Adjustment sheet
The shading sheet is required to execute
this mode. Use TKM-0326 or TKM-0332,
which is the same shading sheet as the
one used for the P-215 or others. Do not
use a sheet with any dirt or creases.
Note: Shading sheet with a black line for
"Registration adjustment" can also be
used.
Operation Procedure
1) Clean feed path, roller, and reading glass.
2) Open the document guides fully extended,
then load a shading sheet you prepared to
fit the width between the document guides.
Note: Do not set extra sheets.
Figure 5-229
5-17