ViewSonic PJ750 Service Manual - Page 11

ViewSonic PJ750 Manual

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Adjust menu VIDEO CAJNIF. DAC-P GAMMA LEVEL MIN MID MAX Adjust Tone menu ON I No. 1 R ±0 G±0 [ B ±0 OFF Major adjustment lattice point No. Ma.or adjustment lattice point position 14) l A CI.?) V/6 : 16, 10 __(7 H/6 >I.ittt< H/3 V/3 >I,ttt< X - -(7 H/3 IIt >tr: H/6 _(:)_ _ _ 11 V/3 A V/6 v CI$ : R Adjustment procedure 1 (when a color differential meter is used) 1. First adjust [MIN] tone [G:]. Unless there is conspicuous black uniformity, there is no need to adjust. (Go to step 7 if no adjustment is required.) 2. Select adjustment point [No. 2] [G:]. When the background is [G] monochrome, press the [MENU SELECT] key on the Remote control transmitter to change to solid white. 3. Adjust the color coordinates of adjustment point [No. 1] and make a note of them. Assume that they are x = x1, y = y1. Note :When the CL-100 color and color difference meter is used, the [A](delta) mode is convenient. When adjustment point [No. 1] color coordinate has been selected, set the slide switch on the side to [A](delta) while holding down the [F] button on the front panel. The measurement shown after this displays the deviation from measurement point 1. 4. Now measure the color coordinates of measurement point [No. 2] and adjust [No. 2] and [G:] so that the color coordinates are as follows. y = y1 ± 0.030 (adjustY only) Similarly, measure adjustment points [No. 3] to [No. 9] and adjust their color coordinates starting in order from the small number points. 5. Then measure the color coordinates for adjustment point [No. 10] and adjust [No. 10] and [G:] so that the color coordinates are as follows. y = y1 ± 0.050 (adjust Y only) Similarly measure adjustment points [No. 11] to [No. 17] and adjust their color coordinates starting in order from the small number points. ViewSonic Corporation 8 6. This completes the adjustments required for [MIN]. Note :Since excessive correction may lead to a correction data overflow during internal calculations, use the following values for reference. [No. 2] to [No. 9] ± 40 or less [No. 10] to [No. 17] ± 70 or less 7. Then adjust [MAX] tone [G]. Select [No. 2] [G:]. If the background is white solid, press the [MENU SELECT] key on the Remote control transmitter to change to [G] monochrome. 8. Measure the illuminance of measurement point [No. 2] and [No. 3]. Temporarily set [No. 2] to illuminance Y2 and [No. 3] to illuminance Y3 [Ix]. 9. Adjust the illuminance of measurement point [No. 2] and [No. 3] to their average values. Thus illuminance Y2' and Y3' of measurement points [No. 2] and [No. 3] should be the following after adjustment. Y2' = Y3' = (Y2 + Y3)÷2 ± 20 [Ix] 10.Next, measure the illuminance of measurement point [No. 10] and [No. 11]. Adjust the illuminance of measurement point [No. 10] and [No. 11] to their average values. Thus illuminance Y10' and Y11' of measurement points [No. 10] and [No. 11] should be the following after adjustment. Y10' =Y11' = (Y10 +Y11)--2 ± 20 [Ix] This completes [G] color adjustments. CONFIDENTIAL -- DO NOT COPY PJ750

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Adjust
menu
VIDEO
CAJNIF.
DAC-P
GAMMA
LEVEL
Adjust
Tone
menu
MIN
MID
MAX
ON
I
No.
1
OFF
R
±0
G±0
[
B
±0
Major
adjustment
lattice
point
No.
Adjustment
procedure
1
(when
a
color
differential
meter
is
used)
1.
First
adjust
[MIN]
tone
[G:].
Unless
there
is
conspicuous
black
uniformity,
there
is
no
need
to
adjust.
(Go to
step
7
if
no
adjustment
is
required.)
2.
Select
adjustment
point
[No.
2]
[G:].
When
the
background
is
[G]
monochrome,
press
the
[MENU
SELECT]
key
on
the
Remote
control
transmitter
to
change
to
solid
white.
3.
Adjust
the
color
coordinates
of
adjustment
point
[No.
1]
and
make
a
note
of
them.
Assume
that
they
are
x
=
x1,
y
=
y1.
Note
:When
the
CL
-100
color
and
color
difference
meter
is
used,
the
[A](delta)
mode
is
convenient.
When
adjustment
point
[No.
1]
color
coordinate
has
been
selected,
set
the
slide
switch
on
the
side
to
[A](delta)
while
holding
down
the
[F]
button
on
the
front
panel.
The
measurement
shown
after
this
displays
the
deviation
from
measurement
point
1.
4.
Now
measure
the
color
coordinates
of
measure-
ment
point
[No.
2]
and
adjust
[No.
2]
and
[G:]
so
that
the
color
coordinates
are
as
follows.
y
=
y1
±
0.030
(adjustY
only)
Similarly,
measure
adjustment
points
[No.
3]
to
[No.
9]
and
adjust
their
color
coordinates
starting
in
order
from
the
small
number
points.
5.
Then
measure
the
color
coordinates
for
adjustment
point
[No.
10]
and
adjust
[No.
10]
and
[G:]
so
that
the
color
coordinates
are
as
follows.
y
=
y1
±
0.050
(adjust
Y
only)
Similarly
measure
adjustment
points
[No.
11]
to
[No.
17]
and
adjust
their
color
coordinates
starting
in
order
from
the
small
number
points.
Ma
.
or
adjustment
lattice
point
position
14)
l
t
t
I
H/6
.
H/3
<
>
V/6
A
V/3
C
.
I
.
?)
t
t
I
>
,
<
H/3
:
16,
t
I
I
H/6
>r:
t
i
t
t
10 _
_
(7
X
-
-(7
_(:)_
_ _
11
V/3
A
V/6
v
CI$
:
R
6.
This
completes
the
adjustments
required
for
[MIN].
Note
:Since
excessive
correction
may
lead
to
a
correction
data
overflow
during
internal
calculations,
use
the
following
values
for
reference.
[No.
2]
to
[No.
9]
±
40
or
less
[No.
10]
to
[No.
17]
±
70
or
less
7.
Then
adjust
[MAX]
tone
[G].
Select
[No.
2]
[G:].
If
the
background
is
white
solid,
press
the
[MENU
SELECT]
key
on
the
Remote
control
transmitter
to
change
to
[G]
monochrome.
8.
Measure
the
illuminance
of
measurement
point
[No.
2]
and
[No.
3].
Temporarily
set
[No.
2]
to
illuminance
Y2
and
[No.
3]
to
illuminance
Y3
[Ix].
9.
Adjust
the
illuminance
of
measurement
point
[No.
2]
and
[No.
3]
to
their
average
values.
Thus
illuminance
Y2'
and
Y3'
of
measurement
points
[No.
2]
and
[No.
3]
should
be
the
following
after
adjustment.
Y2'
=
Y3'
=
(Y2
+
Y3)÷2
±
20
[Ix]
10.Next,
measure
the
illuminance
of
measurement
point
[No.
10]
and
[No.
11].
Adjust
the
illuminance
of
measurement
point
[No.
10]
and
[No.
11]
to
their
average
values.
Thus
illuminance
Y10'
and
Y11'
of
measurement
points
[No.
10]
and
[No.
11]
should
be
the
following
after
adjustment.
Y10'
=Y11'
=
(Y10
+Y11)--2
±
20
[Ix]
This
completes
[G]
color
adjustments.
ViewSonic
Corporation
8
CONFIDENTIAL
--
DO
NOT
COPY
PJ750