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Toshiba 2857DD - Video-Chroma System Adjustments; [COLP] Adjustment; Cutoff and Screen VR Adjustment; Cutoff and Drive Balance Adjustment

Toshiba 2857DD
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ADJUSTMENT
OF
VIDEO-CHROMA
SYSTEM
(Factory
adjustment)
Model
Name:
C5SS
Setting
:
Measure-
:
Adjustment
i
Select
slave
address
OCH
|1.35V(p-p)
{[COLP]
SUB
Contrast:
MAX
Sub-bright
COLOR
Bright
:
CENTER
|
signal
[COLP].
.
When
[COLP]
is
selected,
Y-
PAL
Color
:
CENTER
|
(PAL)
signal
is
muted
and
only
color
signals
are
outputted.
.
Adjust
amplitude
of
the
upper
half
of
the
color
bar
output.
.
Set
the
controls
as
shown
in
the
left
column.
2.
Gradually
increase
the
screen
VR
(T7461)
until
one
of
R,
G
or
B
line
begins
to
brighten
slightly.
3.
Determine
the
position
of
the
screen
VR
here.
4.
Adjust
RCUT,
GCUT
and
BCUT,
brighten
other
lines
until
they
begin
to
light
slightly.
(Adjust
DATA
so
that
the
line
becomes
almost
white.)
5.
Press
-/--
button
on
the
remote
control
to
escape
from
the
horizontal
line
mode.
.
This
adjustment
must
be
done
after
adjustment
of
the
above-
mentioned
cut-off
and
screen
VR’s
have
been
completed.
2.
Adjust
cut-off
and
drive
DATA
alternately.
3.
Use
a
checker
to
adjust
brightness
by
changing
modulation
factor.
{BELL}
BELL
SECAM
QQ01
#21
|Vary
[BELL]
so
that
waveform
|100+10%
filter
color
bar
(TPM01)
|
becomes
flat
on
scope.
[SRY]
SECAM
Dynamic
mode
|SECAM
Q501
#55
|Vary
[SRY]
so
that
level
of
B/W
]0+40mV
R-Y
color
bar
(TP501)
signal
part
matches
to
that
of
black
label
H.BLK
on
scope.
[SBY]
SECAM
Dynamic
mode
|SECAM
Q501
#55
|Vary
[SBY]
so
that
level
of
BAW
|0+40mV
R-Y
color
bar
(TP501)
signal
part
matches
to
that
of
black
label
H.BLK
on
scope.
[COLS]
Sub-color
|Dynamic
mode
|SECAM
Q501
#55
|
Adjust
amplitude
of
color
bar.
3.5
+
0.2V(p-p)
center
color
bar
(TP501)
(Set
the
video
mute
during
SECAM
adjustment.)
RCUT
GCUT
|
40
Hexa-decimai
BCUT
GDRV
)
40
Hexa-decimal
BDRV
Select
horizontal
line
mode
by
pressing
-/-
-
button
on
the
remote
control
in
service
mode.
adjustment
Screen
VR
HIGH
LIGHT;
(103cd/m3)
7195K
-0.005uv
DARK;
(17cd/m3)
7695K
+
0uv
Screen
adjustment
Contrast:
MAX
White,
etc.
Bright
:
CENTER
Color
:
CENTER
-12-

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