Sharp AR-BC260 Service Manual page 121

2) Select PAPER SEL with the scroll key and select A3 (11 x 17)
paper.
Enter the set value corresponding to the paper feed section
with A3 (11 x 17) paper in it, and press the OK key.
3) Press the [EXECUTE] key.
The color balance adjustment pattern is printed.
4) Check that the printed pattern is in the following specification
or in the desired color balance.
If not, perform the following procedures.
High density
C
M
Y
Bk
CMY
mixed
color
Max O N M L K J
1) The max. density section is not blurred.
4) Patch for each of C, M, Y, BK
• The patch density is identical between patches or not reversed.
• The patch density is changed gradually.
The print density should vary gradually from the lower density to
the higher density without reversion of changing direction.
The density level of each color should be almost the same.
It is acceptable for patch B not to be copied.
Patch A is not copied.
When, however, the color balance is adjusted according to the
users request, there is no need to adjust to the standard color bal-
ance as stated above.
5) Select the color to be adjusted and select the adjustment point
with the scroll key.
6) Enter the adjustment value with the 10-key and press the [OK]
key.
The adjustment value can be selected in the range of 245 to
755 (1 to 999). When SIM 46-24 is used to perform the auto-
matic color balance and the density adjustment, all the set val-
ues of this simulation are set to 500.
To increase the density, increase the adjustment value. To
decrease the density, decease the adjustment value.
Repeat procedures 3) to 6) until the condition of procedure 4)
is satisfied.
When the overall density is low or patch A is copied with a high
density, use the arrow keys to change all the adjustment values of
A to O simultaneously and uniformly.
Then perform the patch density adjustment. This allows to make
an efficient adjustment.
By using the black patch as the reference, adjust so that the color
balance of the black patch of each process (CMY) in A to O
becomes virtually same as the black patch.
In this simulation mode, press CLEAR key to return to the normal
copy mode and make actual copies of the service chart and user
documents. Check the adjustment result.
7) Execute SIM 44-21.
The initial setup of half tone image correction is performed.
This procedure is to store the copy color balance adjustment data
as the reference data for half-tone correction.
This procedure should be always executed immediately after com-
pletion of ADJ 11C (Color balance adjustment (Manual)) with SIM
46-21.
When ADJ 11B (Color balance adjustment (Auto)) is performed
with SIM 46-24, this procedure is automatically performed.
Low density
I H G F E D C B A
3) Patch C or D of each of Y, C, M,
and BK is very slightly copied.
2) Patch A of each of Y, M,
C, and BK are not copied.
AR-BC260 SETTING AND ADJUSTMENTS 8 - 28
Normal completion
When [EXECUTE] key is pressed, it is highlighted and the opera-
tion is started.
It takes several minutes to complete the operation. When the
operation is completed, the screen returns to the original state.
After completion of the operation, cancel the simulation.
8) Execute the half tone image correction. (Forcible execution)
(SIM 44-26)
Normal completion
When [EXECUTE] key is pressed, it is highlighted and the opera-
tion is started. It takes several minutes to complete the operation.
When the operation is completed, the screen returns to the origi-
nal state.
After completion of the operation, cancel the simulation.
9) Use the test chart UKOG-0283FCZZ and check the copy color
balance and the density in the Text/Printed photo mode.
(Refer to the section of the copy color balance and the density
check.)
If the copy color balance and the density are not in the speci-
fied level, repeat procedures 7) through 9) until they are in the
specified level.
However, repetition is limited to three times. If repetition of the
above procedures does not set the copy color balance and the
density to the specified level, there may be some other reason.
Investigate the reason and repair or fix the problem, then perform
all the procedures of print quality adjustment from the beginning.
10) When the color balance is customized, register the color bal-
ance as the service target by SIM 63-7.
When the color balance is not customized, there is no need to
perform this work.
If the customized color balance is registered as the service tar-
get, when the color balance is adjusted in the next time, the
automatic color balance adjustment mode can be used.
In the next color balance adjustment, select the service target
color balance in the automatic color balance adjustment
mode, and the color balance will be adjusted to the same color
balance as registered this time.
Abnormal completion
(Error color is displayed.)
Abnormal completion
(Error color is displayed.)