Sharp AR-BC320, Service Manual, Page: 138 / 344

AR-BC320 SETTING AND ADJUSTMENTS 8 - 31
Factory target in the copy color balance adjustment (SIM 46-24)
Use SIM 63-11 to select one of the following color balances as the factory target.
These three color balances cannot be changed. (Fixed)
Service target in the copy color balance adjustment (SIM 46-24)
In the case of the service target, an optional color balance can be adjusted with SIM 46-21 and registered with SIM 63-7.
When, however, SIM 63-8 is executed, the color balance is set to the color balance of the factory target set by SIM 63-11.
Color balance target for user color balance adjustment
This is the same color balance as the service target in the copy color balance adjustment (SIM 46-24). When, therefore, the service target
is changed, this target is also changed accordingly.
(Meaning of the service color balance target gamma data and purpose of registration)
This work must be executed only when the color balance is cus-
tomized by SIM 46-21.
If the color balance is not customized, there is no need to perform
this work.
Execute SIM 46-21 to adjust the color balance (Manual) according
to the user request (customized color balance). Then use the
adjustment pattern printed in this mode to register the service
color balance target gamma data with SIM 63-7.
This will revise the service target gamma data.
It is recommendable to record the adjustment pattern printed in
the above procedure. By using the adjustment pattern, the same
color balance target can be registered in another machine. It is
also useful to register the service color balance target gamma
data again.
Be careful, however, not to fold the pattern or avoid discoloration
and dirt.
Basically the service target gamma data must be registered imme-
diately after completion of the color balance adjustment (Manual)
with SIM 46-21.
If a considerable time has passed after completion of the color bal-
ance adjustment (Manual) with SIM 46-21, the color balance of the
adjustment pattern after a considerable time differs from that
before a considerable time. Do not use such an adjustment pat-
tern.
Whether the service color balance target gamma data are correct
or not can be determined by the following.
When the adjustment result of SIM 46-24 color balance adjust-
ment (Auto) by selecting the service color balance target is abnor-
mal or unsatisfactory:
In this case, the service color balance target gamma data may be
incorrect.
The possible cause is incorrectness or abnormality of the color
balance adjustment pattern used when registering the service
color balance target gamma data of the color balance adjustment
(Auto) with SIM 63-7.
The color balance adjustment pattern is printed after the color bal-
ance adjustment (Manual) with SIM 46-21. The possible cause lies
in this procedure.
Fig. 6 L*a*b* table color system
chromaticity diagram
(hue and chrome)
+b* Direction of Yellow
+a*
Direction
of Red
Direction
of Green
Direction of Blue
Factory color balance target (DEF2) =
Service color balance target/Color balance
target for the user color balance adjustment
Factory color balance
target (DEF1)
SIM63-8
SIM63-8
Factory color balance target
(DEF1) = Service color balance
target/Color balance target for the
user color balance adjustment
DEF1
DEF2
Color balance with emphasis on color
reproduction (factory setting)
Color balance with slightly strong Cyan
DEF3 Color balance with emphasis on Cyan
Default
Hue
Factory color balance target (DEF3)
SIM63-8
Factory color balance target (DE3) =
Service color balance target/Color balance
target for the user color balance adjustment
Factory color balance target (DEF2)