Sharp AR-6020V Service Manual page 39

ADJ 3
Image density adjustment
3-A Copy mode image density adjustment
NOTE: This adjustment sets the copy density for each mode.
<How to operate>
When this adjustment is executed, the warm-up and the shading is
performed. Then, the current setting value is displayed in 2-digits.
When the adjustment value is entered by the [Numeric] keys and
press the [START] key, the setting value is saved and the machine
makes one copy.
When the setting value is increased, the printing copy becomes
darker. When the setting value is decreased, the printing copy
becomes lighter.
With this adjustment, only the Exp3 copy can be printed. If the set-
ting value is increased, the Exp.1 and the Exp.5 copy also become
darker. If the setting value is decreased, the Exp.1 and the Exp.5
copy also become lighter.
When the [INTERRUPT] key is pressed, the process is interrupted
and the machine goes into the sub code input standby mode. When
the [CA] key is pressed, the simulation is terminated.
The switching of each setting and display can be made with press-
ing the [AUTO/TEXT/PHOTO] key. The adjustment range is from 1
to 99.
LED
AUTO indicator
TEXT indicator
PHOTO indicator
AUTO, PHOTO indicator
TEXT, PHOTO indicator
AUTO, TEXT, PHOTO indicator
1) Set a test chart (UKOG-0162FCZZ) on the OC table as shown
below.
UKOG-0162FCZZ
2) Put several sheets of A3 or 11" x 17" white paper on the test
chart.
3) Enter the SIM 46-2.
4) After warm-up, shading is performed and the current set value
of the density level is displayed on the display section in 2 dig-
its. For mode selection, use the AUTO/TEXT/PHOTO key.
5) Change the set value with the Numeric keys to adjust the copy
image density.
6) Make a copy and check that the specification below is satis-
fied.
Adjustment mode
AE mode (600dpi)
TEXT mode (600dpi)
PHOTO mode (Error diffusion)
TS mode (AE) (600dpi)
TS mode (TEXT) (600dpi)
PHOTO mode (Dither)
AR-6020V ADJUSTMENTS 5 – 10
<Adjustment specification>
Density LED Expo-
mode sure
level
Auto Auto -
Text Text 3
Photo
(Error
Photo 3
diffu-
sion)
Toner Auto/
-
save Photo
Toner Text/
3
save Photo
Photo Auto/Text/
3
(Dither) Photo
Sharp Set value Density
Gray mode
Chart
output
"2" is
slightly
Auto
copied.
"3" is
slightly Text
The greater
copied.
the set
"2" is Photo
value is the
slightly (Error
greater the
copied. diffusion)
density is
The smaller
"2" is
the set
Toner
slightly
value is the
save
copied
smaller the
"3" is
density is.
Toner
slightly
save
copied
"2" is
Photo
slightly
(Dither)
copied