Adj 11] Copy Color Balance/Density Adjustment - Sharp AR-BC320 Service Manual

Adjustment
Adjustment item
IMAGE Lead edge image
LOSS loss
DEN-A Lead edge void
area
DEN-B Rear edge void
area
ADJ 11 Copy color balance/density adjustment
(1) Note for the copy color balance/density adjustment
(Necessary conditions for execution of the copy color balance/density adjustment)
Before execution of the copy color balance/density adjustment, check that all the adjustments related to the copy color balance and density
have been completed properly.
The importance level is as shown below.
(Adjustment items which directly affect the copy color balance and density and must be checked or adjusted
before execution of the image quality adjustment)
1) Adjustment items: ADJ 2, ADJ 3, ADJ 4
JOB No
ADJ 2 Image density sensor adjustment
ADJ 3 Image focus, image skew adjustment (LED (writing) unit)
ADJ 4 Image registration adjustment
The user color balance adjustment must be set to the center (default).
Item
User color balance setting: Default (Center) (Special function) Set the color balance to the standard state. Check that it is set to the center.
The set value of SIM 46-27 is set to the default.
SIM Setting
Display/Item
No (Default)
46-27 A BLACK TEXT
(SLOPE)
50
B BLACK TEXT
(INTERCEPT)
50
The set value of the following simulation must be set to the default.
Setting
SIMNo Item
(Default)
46-1
A – R 50
46-2
A – K 50
46-10 to 16
A – O 500
46-20
A – O 500
Note
value
4.0 ± The greater the set value is,
1.0mm the greater the image loss is.
4.0 ± The greater the set value is,
1.0mm the greater the void area is.
4.0 ± The greater the set value is,
1.0mm the greater the void area is.
ADJUSTMENT ITEM LIST
ADJ 4A Image registration adjustment (Auto adjustment)
ADJ 4B Image registration adjustment (Manual adjustment)
Content
Black image edge section
gamma (tilt) adjustment
(Black text and black line
reproduction adjustment)
Black image edge section
density (overall level)
adjustment (Black txt and
black line reproduction
adjustment)
Phenomenon when the set value is changed
The density and color balance in the low density
section of color copy are changed.
The density in the low density section of
monochrome copy is changed.
The color copy density and color balance are
changed. (each copy mode)
The color copy density and color balance of all
copy modes are changed.
AR-BC320 SETTING AND ADJUSTMENTS 8 - 22
Purpose
Phenomenon when the set value
is changed
When the set value is increased,
the contrast of black line and black
text outline sections is reduced.
On the contrary, when the set
value is decreased, the contrast is
increased. (Sharpness of black
text and black lines is changed.)
(Text/Printed photo, Text, Text/
Photograph copy mode)
The density of black lines and
black text outline is changed.
(Text/Printed photo, Text, Text/
Photograph copy mode)
Set to the default when adjusting the copy quality.
Do not adjust the density in the low density section by
using this simulation.
Set to the default when adjusting the copy quality.
Set to the default when adjusting the copy quality.
SIMULATION
44-2/44-13
64-1/61-4
50-22
50-20
Note
Phenomenon occurring
when the adjustment
Note
value is not within the
normal value range.
The contrast and density For image
of lines and text outline quality
section are changed. adjustment,
(Sharpness of text and set to 50.
lines is changed.) (Text/
Printed photo, Text, Text/
Photograph copy mode)
Note