ViewSonic PJ750 Service Manual - Page 9

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4-4 PSIG G adjustment (vertical stripe adjustment) Signals for internal adjustment Adjustment procedure 1. Make this adjustment after completing the adjustment in 4-3 Flicker adjustment. 2. Use DAC-P - PSIG - G: in the Adjust menu to adjust so that the vertical lines spaced every 6 dots are as inconspicuous as possible. 4-5 White balance adjustment 1. Perform these adjustments after the PSIG adjustment described in Section 4-4. 2. First, adjust the G color. 3. Place the cursor on Slide Show in the Adjust menu [A/D], press the [Pod key three times to display G monochrome and adjust the illuminance at the center of the screen. Make a note of the setting (here assumed to be A [Ix]). Press the MENU key to return. 4. Adjust Gamma 86% and G: in the Adjust menu so that illuminance (Y) at the center of the screen is adjusted as follows. Y= Ax 0.712 ± 40 [Ix] 5. Adjust Gamma, 43% and G: in the Adjust menu so that illuminance (Y) at the center of the screen is adjusted as follows. Y= Ax 0.155 ± 15 [Ix] 6. Adjust Gamma, 29% and G: in the Adjust menu so that illuminance (Y) at the center of the screen are adjusted as follows. Y = A x 0.064 ± 5 [Ix] 7. Adjust Gamma, 14% and G: in the Adjust menu so that illuminance (Y) at the center of the screen is adjusted as follows. Y = A x 0.014 ± 1 [Ix] 8. Set the adjust value to 0. 9. Now, adjust the R and B colors. 10.Place the cursor on [A/D] - [SLIDE SHOW] in the ADJUST menu and press the [OH key once to display a white screen. Then measure the color coordinates at the center of the screen and take a note of the setting (here assumed to be x1, y1). Press the [MENU] key to return. 11.Adjust Gamma, 86%, R: and B: so that the color coordinates (x, y) at the center of the screen take on the following values. x = (x1 - 0.005) ± 0.003 y = (y1 - 0.010) ± 0.005 12.Adjust Gamma, 43%, R: and B: so that the color coordinates (x, y) at the center of the screen take on the following values. x = (x1 - 0.005) ± 0.003 y = (y1 - 0.015) ± 0.005 13.Adjust Gamma, 29%, R: and B: so that the color coordinates (x, y) at the center of the screen take on the following values. x = (x1 - 0.010) ± 0.003 y = (y1 - 0.020) ± 0.005 14.Adjust Gamma, 14%, R: and B: so that the color coordinates (x, y) at the center of the screen take on the following values. x = (x1 - 0.010) ± 0.003 y = (y1 - 0.025) ± 0.005 ViewSonic Corporation 6 CONFIDENTIAL -- DO NOT COPY PJ750

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4-4
PSIG
G
adjustment
(vertical
stripe
adjustment)
Signals
for
internal
adjustment
4-5
White
balance
adjustment
1.
Perform
these
adjustments
after
the
PSIG
adjustment
described
in
Section
4-4.
2.
First,
adjust
the
G
color.
3.
Place
the
cursor
on
Slide
Show
in
the
Adjust
menu
[A/D],
press
the
[Pod
key
three
times
to
display
G
monochrome
and
adjust
the
illuminance
at
the
center
of
the
screen.
Make
a
note
of
the
setting
(here
assumed
to
be
A
[Ix]).
Press
the
MENU
key
to
return.
4.
Adjust
Gamma
86%
and
G:
in
the
Adjust
menu
so
that
illuminance
(Y)
at
the
center
of
the
screen
is
adjusted
as
follows.
Y=
Ax
0.712
±
40
[Ix]
5.
Adjust
Gamma,
43%
and
G:
in
the
Adjust
menu
so
that
illuminance
(Y)
at
the
center
of
the
screen
is
adjusted
as
follows.
Y=
Ax
0.155
±
15
[Ix]
6.
Adjust
Gamma,
29%
and
G:
in
the
Adjust
menu
so
that
illuminance
(Y)
at
the
center
of
the
screen
are
adjusted
as
follows.
Y
=
A
x
0.064
±
5
[Ix]
7.
Adjust
Gamma,
14%
and
G:
in
the
Adjust
menu
so
that
illuminance
(Y)
at
the
center
of
the
screen
is
adjusted
as
follows.
Y
=
A
x
0.014
±
1
[Ix]
8.
Set
the
adjust
value
to
0.
9.
Now,
adjust
the
R
and
B
colors.
Adjustment
procedure
1.
Make
this
adjustment
after
completing
the
adjustment
in
4-3
Flicker
adjustment.
2.
Use
DAC-P
-
PSIG
-
G:
in
the
Adjust
menu
to
adjust
so
that
the
vertical
lines
spaced
every
6
dots
are
as
inconspicuous
as
possible.
10.Place
the
cursor
on
[A/D]
-
[SLIDE
SHOW]
in
the
ADJUST
menu
and
press
the
[OH
key
once
to
display
a
white
screen.
Then
measure
the
color
coordinates
at
the
center
of
the
screen
and
take
a
note
of
the
setting
(here
assumed
to
be
x1,
y1).
Press
the
[MENU]
key
to
return.
11.Adjust
Gamma,
86%,
R:
and
B:
so
that
the
color
coordinates
(x,
y)
at
the
center
of
the
screen
take
on
the
following
values.
x
=
(x1
-
0.005)
±
0.003
y
=
(y1
-
0.010)
±
0.005
12.Adjust
Gamma,
43%,
R:
and
B:
so
that
the
color
coordinates
(x,
y)
at
the
center
of
the
screen
take
on
the
following
values.
x
=
(x1
-
0.005)
±
0.003
y
=
(y1
-
0.015)
±
0.005
13.Adjust
Gamma,
29%,
R:
and
B:
so
that
the
color
coordinates
(x,
y)
at
the
center
of
the
screen
take
on
the
following
values.
x
=
(x1
-
0.010)
±
0.003
y
=
(y1
-
0.020)
±
0.005
14.Adjust
Gamma,
14%,
R:
and
B:
so
that
the
color
coordinates
(x,
y)
at
the
center
of
the
screen
take
on
the
following
values.
x
=
(x1
-
0.010)
±
0.003
y
=
(y1
-
0.025)
±
0.005
ViewSonic
Corporation
6
CONFIDENTIAL
--
DO
NOT
COPY
PJ750