AR-C170 (serv.man31). Printer controller section - Sharp Copying Equipment Service Manual (repair manual). Page 15

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AR-C170M  PRINTER CONTROLLER SECTION  14 - 15
Find out the density point in the test pattern array 1 which lies
between the Lower Limit and the Upper Limit of the test chart
(1).
Put a check mark on the density point found in the procedure
above.
If there is no density point which satisfies the above condition
in test pattern array 1, perform the following procedures.
• When the test chart (1) density is higher than the maximum
density (+4) in the array 1:
 Put a check mark on "+4" in the array 1.
• When the test chart (1) density is lower than the minimum
density (–4) in the array 1:
 Put a check mark on "-4" in the array 1. 
For densities of Test chart (2) to (12), perform the same proce-
dure as procedure 6).
7) Set the adjustment points (+4 to –4 on the right side) corre-
sponding to the density points (12 positions) marked with
check mark on the test pattern on the adjustment menu.
8) Press the OK key. (The adjustment values are set.)
Adjustment menu
Operating procedures
• Use the 
 and 
 keys to select the color (Y, M, C, or Bk)
in “LOW AREA”, “MIDDLE AREA” or “HIGH AREA” that you
wish to adjust.
• Use the 
 and 
 keys to select the density level (+4 to –
4) that matches the density level in the standard color chart.
• Use the 
 key to return all values to the default settings.
• To adjust all values simultaneously, select “ALL” with the
 key and then adjust the values with the 
 and 
keys.
When there is no density point that corresponds to the center
between the Lower Limit and the Upper Limit in the test pattern in
procedures 6) and 7), or when "+4" or "–4" adjustment point is set:
Repeat procedures 4) to 8) until a density pattern that corresponds
to the center of the Lower Limit and the Upper Limit of the test
chart appears in the test pattern.
(2) Easy calibration (Gray balance adjustment)
1) Enter the key operator program mode. 
2) Select "Printer setting."
3) Select "Color adjustments."
4) Select "Easy calibration adjustments."
5) The display below is shown. Select A4 or 8.5" x 11" size
paper, and press the EXECUTE key. 
The test pattern for adjustment is printed, and the adjustment
menu is displayed. 
The test patterns A and B show the process gray with the cur-
rent adjustment value as the reference value (±0).
In the X-axis, the Magenta density is varied in 7 steps of –3 to
+3. (Test pattern 2 in –3 to ±0, Test pattern 3 in ±0 to +3)
In the Y-axis, the Yellow density is varied in 7 steps of –3 to
+3.
The Cyan density is fixed. 
C
M
Y
Bk
Low Density
Mid Density
High Density
C
M
Y
Bk
C
M
Y
Bk
AR-C260 Color Chart
Lower
Limit
Upper
Limit
(12)
(1) (2)
O K
KEY OPERATOR PROGRAMS
COLOR BALANCE
C   M   Y   Bk
C   M   Y   Bk
C   M   Y   Bk
ALL
LOW AREA
MIDDLE AREA
HIGH AREA
EASY CALIBRATION
COLOR BALANCE
TEST PRINT
KEY OPERATOR PROGRAMS
COLOR ADJUSTMENTS
Test Pattern A
Test Pattern B
Magenta
(-3~
±
0)
Magenta
(
±
0~+3)
Example: if this is
the desired color, 
select “+1” for X 
and “-2” for Y. 
Yellow 
(-3~+3)
Yellow
(-3~+3)
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