Sharp AR-BC320 Service Manual page 137

(Auto color balance adjustment service color balance target gamma setup)
a. Outline
Auto color balance adjustment is performed with a certain color
balance (gamma) as a target.
There are following three kinds of targets:
Factory color balance (Gamma) target
Service color balance (Gamma) target
User color balance (Gamma) target)
Only the service target among them allows optional setup of a
color balance (gamma) target.
Color balance target for copy color balance adjustment
Kind
A Factory color There are three kinds of color balance targets and each one has its color balance specified by the design. Use
balance (Gamma) SIM 63-11 to select one of them as the factory target. The default (factory setting) is the color balance with
target emphasis on color reproduction (DEF1).
B Service color This target is used when the user requests to use a unique color balance. However, the unique color balance
balance (Gamma) requested by the user must be registered (set) in advance.
target The serviceman adjusts the color balance requested by the user with SIM 46-21, and registers (sets) it with SIM
63-7. This color balance target is used when the user performs the color balance adjustment.
When, therefore, the service color balance target is changed, the color balance target of the color balance
adjustment by the user is also changed. When, however, SIM 63-8 is executed, the color balance is set to the
same as the factory color balance target set with SIM 63-11.
The default (factory setting) is set to the color balance same as the factory color balance target with emphasis on
color reproduction (DEF1).
When the user does not request to set an optional color balance, be sure to use SIM 63-8 to set the color
balance same as the factory color balance target.
C User color Color balance same as the service color balance (gamma) target.When the service color balance target is
balance (Gamma) changed, this color balance target is also changed.
target
Relationship of the factory target and the service target in the copy color balance adjustment (SIM 46-24) and the color balance
target for the user color balance adjustment
Use SIM 63-11 to select
one of the three kinds of
color balance targets.
Factory color balance
target (DEF1)
Factory color balance
target (DEF2)
Factory color balance
target (DEF3)
Color balance target in the copy color balance
automatic adjustment (SIM 46-24)
Factory color balance
target (DEF1)
Factory color balance
target (one of DEF1 – 3)
Factory color balance
target (one of DEF1 – 3)
Color balance target in the user color balance adjustment
Color balance target for
the user color balance
adjustment
AR-BC320 SETTING AND ADJUSTMENTS 8 - 30
This setup must be performed in the following cases.
• When the copy color balance and the density adjustment is
manually performed. (SIM 46-21)
• When a U2 trouble occurs.
• When the MFP PWB is replaced.
• When the EEPROM on the MFP PWB is replaced.
• When the user requests to customize the color balance.
• When the service color balance target gamma is found to be
incorrect.
Description
Service color balance
target
Service color balance
target (Unique)
Service color balance
target
Service color balance
target
Factory setting
Use SIM 46-21 to adjust the
optional color balance, and
use SIM 63-7 to register it.
Execute SIM 63-8.
(The service color balance
target is the same as the
factory color balance target.)