White Balance Adjustment (15K); Sub Sub Contrast; Adjustment - Sony PVM-9L2 Service Manual

2-14.
White Balance Adjustment
(15k)
1.
Connect
the
15k windows
signal to
the
LINE
A
connector.
2.
Enter the service
mode.
3.
Select
LINE
A.
4.
From
the operation panel, set as
follows
:
CONTRAST
:
80 (Center chcking)
BRIGHT
:
0 (mechanical center)
5.
Set the
CHROMA
knob on
the front panel to
MIN.
6.
Select the following sub
menus from
the Service
Menu
in the order of
:
[SIGNAL]
—
>
[WHITE
BALANCE]
and
set
[COLOR TEMP]
to
D65.
7.
Select
[ADJUST
GAIN].
8.
While
fixing
G
GAIN/BIAS
to 700, adjust
B
and
R
for
optimum
white balance.
Standard value
:
D65 (X
=
313,
Y
=
329
±
1
JND)
9.
Upon
completion of
adjustment, press the
[MENU]
key
to return to the
previous
menu.
10.
Change
the signal level to
3 cd/m^.
11.
Select
[ADJUST
BIAS]
of the
menu.
12.
While
fixing
G
to
700
in the
same
way
as in step 10,
adjust
B
and
R
for the
unity cut-off
level.
13.
Upon
completion of adjustment, press the
[MENU]
key
to
return
to
the
previous
menu.
14.
Repeat adjustments
from
step
9
to
step
14
until
all
specifications are
satisfied all at
the
same
time.
(Tracking)
15.
Set
[COLOR TEMP]
to
D93.
16.
Repeat
adjustments
from
step
7
to step
14 in the
same
way.
However,
fix
the following controls to the
fixed values
as
shown below and
make
the adjustment.
G
GAIN:
700
G
BIAS: 400
Standard value
:
D93
(X =
284,
Y
=
298
±
1
JND)
5.
6
.
7.
8
.
Set
as
follows
from the front panel:
CONTRAST
:
0
(MIN)
BRIGHT
:
0 (mechanical c
enter)
In the service
mode,
adjust
SUB-BRIGHT
Iso
that
the
following setup
is
obtained
at
the 20-step
gray
scale
with setup
0:
0
and
5
IRE
CUT OFF
10
IRE
=>
Slightly
illuminates
Select the
USER
MENU
and
select
USER.CONFIG
NTSC
SETUP
from
the
USER MENU.
Set the
NTSC
SETUP
to 7.5.
In the service
mode,
adjust
SUB-BRIGHT
so that
the following setup
is
obtained
at
the 20-step
gray
scale
with
setup 7.5:
0 and
5
IRE
=>
CUT
OFF
10
IRE
=>
Slightly
illuminates
9.
Set
CONTRAST
on
the operation
panel
to
the
me-
chanical center click position.
10.
Turn
off the
CONTRAST
display.
11.
Select
SUB CONTRAST.
12.
Input the
window
signal
whose
size
is
less
than
what
is
shown
below.
13.
Adjust luminance
to the
under
standard value with
SUB-CONTRAST.
Standard value
:
9 inch
MODEL
SUB
CONT
170cd/m2
2-15.
SUB
BRIGHT,
SUB CONTRAST
Adjustment
1.
Connect
the
monoscope
signal to the
LINE
A
connec-
tor.
2.
Enter the service
mode.
3.
Select
WHUE
BALANCE.
4.
Select
SUB
BRIGHT.
14.
Select
UNDER
SCAN.
(4
:
3
UNDER
SCAN)
15.
Select
SUB
CONTRAST
and
adjust
luminance to the
standard value
that is
specified in step
13,
with
SUB-
CONTRAST.
16.
Select
16
:
9.
(16
:
9
UNDER
SCAN)
17.
Select
SUB
CONTRAST
and
adjust
luminance to the
standard value that
is
specified in step
13,
with
SUB-
CONTRAST.
18.
Select
UNDER
SCAN.
(16
:
9
NORMAL)
19.
Select
SUB
CONTRAST
and
adjust
luminance
to the
standard value
that
is
specified in step
13,
with
SUB-
CONTRAST.
20.
Return
to
the
4
:
3
NORMAL
screen.
21
.
Turn
the
POWER
OFF.
2-1
9
PVM-9L2