C. Necessary Tool For Copy Density Adjustment; D. Features Of Copy Density Adjustment; E. Copy Density Adjustment Procedure - Sharp AR-168S Service Manual

C. Necessary tool for copy density adjustment

• One of the following test charts:
UKOG-0162FCZZ, UKOG-0089CSZZ, KODAK GRAY SCALE
• B4 (14" x 8 1/2") white paper
• The user program AE setting should be "3."
1 2 3 4 5
Test chart comparison table
UKOG-
0162FCZZ
1 2 3
DENSITY
No.
UKOG-
0089CSZZ
0.1 0.2
DENSITY
No.
KODAK
GRAY 1
SCALE

D. Features of copy density adjustment

For the copy density adjustment, the image data shift function provided
in the image process LSI is used.
List of the adjustment modes
Auto Mode Brightness 1 step only
Manual Mode Brightness 5 steps. Adjustment of only the center
brightness is made.
Photo Mode Brightness 5 steps. Adjustment of only the center
brightness is made.
Manual T/S Brightness 5 steps. Adjustment of only the center
mode brightness is made.
T/S Auto mode Brightness 1 step only

E. Copy density adjustment procedure

The copy density can be adjusted in 300dpi or in 600dpi.
Main code Sub code Resolution for copy density adjustment
01
46
02
For selection of modes, use the copy mode select key.
(1) Test chart (UKOG-0162FCZZ) setting
1) Place the test chart so that its edge is aligned with the A4 (Letter)
reference line on the document table. Then place a A4 (14" x
8 1/2") white paper on the test chart and close the document cover.
White paper
Test chart Test chart
6 7 8 9 10
4 5 6 7 8 9 10
0.3 0.5 1.9
2 3 4 19
300dpi
600dpi
AR-168S/168D ADJUSTMENTS 9 - 4
(2) Perform the adjustment in each mode.
1) Execute TC 46-01 (300dpi). To adjust in 600dpi, execute TC 46-
02.
2) Select the mode to be adjusted with the exposure mode select key.
Set the exposure level to 3 (center) for all adjustment. (Except for
the auto mode.)
W
TEXT
| | | | |
W
Adjustment
mode
Auto mode
0
Text mode
A
Photo mode
Text T/S mode
Auto T/S mode
3) Make a copy.
Check the adjustment level (shown in the above table) of the
exposure test chart (Sharp Gray Scale).
Non toner
save mode
Not copied.
Toner save
mode
Not copied.
(When too bright): Decrease the value displayed on the copy quantity
(When too dark):
* The value can be set in the range of 1 - 99.
(1) Exposure mode, level display
(2) Mode select key
Display
LED
item
AE COPY mode lamp
TEXT PRINT mode lamp
PHOTO SCAN mode lamp
TSTXT PRINT mode lamp
SCAN mode lamp
TSAE COPY mode lamp
SCAN mode lamp
Sharp Gray Scale adjustment level
1 2 3 4 5 6 7
Slightly copied.
1 2 3 4 5 6 7
Slightly copied.
display.
Increase the value displayed on the copy quantity
display.
Sharp gray chart
adjustment level
"3" is slightly
copied.
"3" is slightly
copied.
"3" is slightly
copied.
"3" is slightly
copied.
"3" is slightly
copied.
8 9 10 W
8 9 10 W