JVC LT-32X575/T Service Manual page 24

Measuring
Item
instrument
WHITE Remote
BALANCE control unit
(HIGHLIGHT)
Signal
generator
4.7.2 MTS CIRCUIT
Measuring
Item
instrument
MTS INPUT Remote
LEVEL control unit
Signal
generator
MTS TV audio
SEPARATION multiplex
signal
generator
Oscilloscope
Remote
control unit
L-Channel
signal waveform
1 cycle
1-24 (No.YA214)
Test point Adjustment part
[1.ADJUST]
S030: R DRIVE (Red drive)
S031: G DRIVE (Green drive)
S032: B DRIVE (Blue drive)
Test point Adjustment part
[1.ADJUST]
T001: IN LEVEL
L OUT [1.ADJUST]
R OUT T002: LOW SEP
T003: HI SEP
R-Channel
crosstalk portion
Minimum
Description
(1) Receive a NTSC 75% all white signal.
(2) Set "VIDEO STATUS" to STANDARD.
(3) Set "ASPECT" to FULL.
(4) Select "COLOR TEMPERATURE" to LOW.
(5) Select "1.ADJUST" from the SERVICE MODE.
(6) Keep one of < S030 > (Red drive), < S031 >
(Green drive) or < S032 > (Blue drive)
unchanged, then lower the other two so that the
all-white screen is equally white throughout.
NOTE:
Set one or more of < S030 >, < S031 >, and
< S032 > to "255".
(7) Check that white balance is properly tracked
from low light to high light. If the white balance
tracking is deviated, adjust to correct it.
(8) Press the [MUTING] key to memoirze the set
value.
Description
(1) Receive the any broadcast.
(2) Select "1.ADJUST" from the SERVICE MODE.
(3) Verify that the < T001 > (IN LEVEL) is set at its
initial setting value.
(4) Press the [MUTING] key to memorize the set
value.
(1) Input the stereo L signal (300Hz) from the TV
audio multiplex signal generator to the antenna
terminal.
(2) Connect an oscilloscope to L OUT pin of the
MONITOR OUT, and display one cycle portion
of the 300Hz signal.
(3) Change the connection of the oscilloscope to R
OUT pin of the MONITOR OUT, and enlarge the
voltage axis.
(4) Select "1.ADJUST" from the SERVICE MODE.
(5) Set the initial setting value of the < T002 > (LOW
SEP).
(6) Adjust the < T002 > so that the stroke element
of the 300Hz signal will become minimum.
(7) Change the signal to 3kHz, and similarly adjust
the < T003> (HI SEP).
(8) Press the [MUTING] key to memorize the set
value.