MX-1800N (serv.man14). Section 6 - Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 56

MX-1800N  ADJUSTMENTS  6 – 56

• Relationship between the factory target and the service target and the color balance target for the user color balance adjustment in the

printer color balance adjustment (SIM 67-24)

• Factory target in the printer color balance adjustment (SIM 67-24)

By use of SIM 67-26, one of the following color balances can be set as the factory color balance target.
Each of the three color balances cannot be changed. (Fixed)

• Service color balance target in the copy color balance adjust-

ment (SIM 67-28).
For the service color balance target, an optional color balance
can be adjusted with SIM 67-25 and registered with SIM 67-27.
When, however, SIM 67-28 is executed, the color balance is set
to the same balance as the factory color balance target set with
SIM 67-26.

• Color balance target in the user color balance adjustment

This color balance is same as the service color balance target in
the copy color balance adjustment (SIM 67-24). When, therefore,
the service color balance target is changed, this target is also
changed accordingly.

(Meaning of the service color balance target gamma data and
the purpose of registration)
This procedure must be executed only when the color balance is
customized with SIM 67-25.

If the color balance is not customized, this procedure is not
required.
After completion of the customized color balance adjustment (Man-
ual) with SIM 67-25 according to the user's request, use SIM 67-27
to register the service color balance target data by use of the
printed adjustment pattern.
By this procedure, the service color balance target is revised.
It is recommendable to keep the printed adjustment pattern with
SIM 67-25. This adjustment pattern can be used to register the
same color balance target to another machine.
It is also useful to register the service color balance target data.
Do not fold it and keep it under the circumstances which protect it
from discoloration and dirt.
The service color balance target data are basically registered
immediately after the color balance adjustment (Manual) with SIM
67-25.

Factory color balance
target (DEF2)

Factory color balance
target (DEF1)

Factory color balance
target (DEF3)

Factory color balance
target (DEF1)

Service color balance
target

=

Factory color balance
target (one of DEF1 – 3)

Service color balance
target

=

Factory color balance
target (one of DEF1 – 3)

Service color balance
target (Unique)

≠

Use SIM 67-25 to adjust the
optional color balance, and
use SIM 67-27 to register it.

Execute SIM 67-28.
(The service color balance
target is the same as the
factory color balance target.)

Factory setting

Color balance target for
the user color balance
adjustment

Service color balance
target

=

Use SIM 67-26 to select
one of the three kinds of
color balance targets.

Color balance target in the copy color balance
automatic adjustment (SIM 67-24)

Color balance target in the user color balance adjustment

(A)

Factory color balance target (DEF2)

SIM67-28

+b* Direction of Yellow

Hue

+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)

SIM67-28

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

Factory color balance target (DEF3)

SIM67-28

Factory color balance target (DEF3) =
Service color balance target/Color balance
target for the user color balance adjustment