Sharp MX-4100N Service Manual page 132

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 is basically registered imme-
diately after the color balance adjustment (Manual) with SIM 67-25.
If a considerable time has passed after completion of the color bal-
ance adjustment (Manual) with SIM 67-25, the color balance of the
adjustment pattern at the time of adjustment differs from the color
balance of the adjustment pattern printed after a considerable time.
Never use such a pattern for the adjustment.
The correctness of the service color balance target data can be
judged as follows.
When result of the color valance adjustment (Auto) with selecting
the service color balance target in SIM 67-24 is unsatisfactory or
abnormal.
In that case, the registered service target data for the color balance
adjustment (Auto) may be improper.
This may be caused when an improper or abnormal color balance
adjustment pattern was used to register the service color balance
target data for the color balance adjustment with SIM 67-27.
The color balance adjustment pattern used in registration was
made and printed by the color balance adjustment (Manual) with
SIM 67-25. This procedure may have been executed erroneously.
b. Setting procedure
(Setting procedure of an optional color balance (gamma) as the
service color balance target)
1) Use SIM 67-25 (Printer color balance adjustment (manual
adjustment) mode) to print two sheets of the color patch image
(adjustment pattern).
If the color balance is shifted from the standard, an adjustment
is required. If not, an adjustment is not required. When an
optional color balance is requested by the user, make an
adjustment.
2) Enter the SIM 67-27 mode.
3) Press [SETUP] key.
4) Set the color patch image (adjustment pattern) correctly
adjusted and printed in the printer color balance adjustment
(Manual adjustment) (SIM 67-25) (ADJ 21C) on the document
table.
A color patch image (adjustment pattern) printed by another
machine can be used.
Set the pattern so that the light density side is on the left side.
Place 5 sheets of white paper on the color patch image
(adjustment pattern).
This procedure must not be executed when the copy color bal-
ance (manual) was adjusted with SIM 67-25 to a unique color
balance requested by the user and it was registered as the
service color balance target with SIM 67-27.
5) Press [EXECUTE] key.
The color patch image (adjustment pattern) is read.
6) Press [REPEAT] key, set the second color patch image
(adjustment pattern), and execute the procedure 5) again.
The color balance (gamma) target set level of each color (K, C,
M and Y) can be checked with K/C/M/Y keys.
Check that the set level is increased in the sequence of B - Q
(MAX). If there is no variation or variation is reversed, it is
judged as abnormal.
In case of an abnormality, repair the problem and try again.
7) Press [OK] key.
The color balance (gamma) of the color patch image (adjust-
ment pattern) used in the procedure 5) is set as the service tar-
get.
(Procedures to set the service color balance target and the color
balance target for the user color balance adjustment to the same
color balance as the factory color balance target)
This procedure must not be executed when the copy color balance
was adjusted with SIM 67-25 to a unique color balance requested
by the user and it was registered as the service color balance tar-
get with SIM 67-27.
* When the factory color balance target is changed with SIM 67-
26, be sure to execute this procedure.
1) Enter the SIM 67-28 mode.
2) Press [EXECUTE] key.
3) Press [YES] key.
The service color balance target and the color balance target for
the user color balance adjustment are set to the same color bal-
ance as the factory color balance target.
MX-5001N ADJUSTMENTS 5 – 90