Advertisement
NTSC Color Output Adjustment
Y, V-P.C. Board
1.
Equipment
to be used
NTSC Signal Generator: NTSC Color Bar Pattern
VIDEO input
Oscilloscope:
TPKB, TPKG • TPY6 (GND}
2.
Initial
conditions
TV SYSTEM:
AUTO or
NTSC
PICTURE:
STANDARD
Adjustment
Mode:
Adjustment Mode 1
3.
Adjustment Procedures
(1) Receive a
NTSC
Color Bar Pattern signal.
(2) Connect an oscilloscope between TPKB
-
TPY6 (Y-P.C.
Board).
(3) Adjust NTSC B-Y ADJ VR (R608 on V-P.C. Board} to
equalize amplitude "A" of the TPKB waveform and
amplitude "D" of it.
(4) Adjust SUB TINT VR {R621 on V-P.C. Board) to
equalize amplitude "8" of the TPKB waveform and
amplitude "C" of it
(5) Check amplitude "A" and "D" and amplitude "8" and "C".
If necessary, repeat step (3) and (4).
A
B
C
TPKB Waveform
(6) Change
the
connection of the oscilloscope "+" side to
TPKG
(7} Adjust NTSC R-Y ADJ VR (R603 on V-P.C. Board) to
equalize the yellow level of
the
TPKG waveform and the
cyan level of it.
Yellow
Cyan
Equalize these levels.
TPKG Waveform
j
'- • • . . •
. . . --
-
--
--
SECAM Color Output
Adjustment
DT-M3050W
Bell Filter Adjustment
(V-P.C.
Board)
1. Equipment to be used
SECAM Signal Generator: SECAM Color Bar Pattern
VIDEO input
Oscilloscope: TPV31
(through
10k0) - TPV1 (GND)
NOTE:
Use a 1 O: 1 Probe.
2.
Initial
conditions
TV SYSTEM:
AUTO or SECAM
Adjustment
Mode:
Adjustment
Mode
1
3. Adjustment Procedures
(1) Receive a SECAM Color Bar Pattern signal.
(2) Connect an oscilloscope
between TPV31
-
TPV1
through 1 0k!l.
{3) Adjust BELL FILTER (L605) to flat
the
SECAM chroma
signal of TPV31 as best as it can.
SECAM
IDENT, 8-Y,
and
R-Y Adjustment
(V-P.C.
Board)
1.
Equipment to be used
SECAM Signal Generator: SECAM Color Bar Pattern
VIDEO input
Oscilloscope:
TPV52, TPV53 - TPV1 (GND)
2. Initial
conditions
TV SYSTEM:
AUTO or SECAM
Adjustment Mode: Adjustment
Mode
1
3.
SECAM IDENT Adjustment
(1) Receive a SECAM Color Bar
Pattern
signal.
(2) Adjust SECAM
IDENT
(l606) for the maximum on the
digital voltmeter and check
that
its reading is 7V or
more.
3. SECAM B-Y Adjustment
(1) Connect an oscilloscope between TVP52 and TPV1
(GND).
(2) Adjust SECAM B OUT 1 (L601) to equalize the level
during the
H
blanking period of the TVP52 waveform
and
the
color-center-line level of it.
Color Center
Line
' '
I ■•• I
H Blanking Period
TPV52
Waveform
4. SECAM R-Y Adjustment
(1) Change the connection of the oscilloscope
"+"
side to
TVP53.
{2) Adjust SECAM R OUT 1 (L602) to equalize the level
during the H blanking period of the TVP53 waveform
and the color-center-line level of it.
-
35
-
Advertisement
