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(No.YA092B)1-33
4.7.3 MTS CIRUT
Item
Measuring
instrument
Test point Adjustment part Description
WHITE
BALANCE
(High light)
adjustment
Signal
generator
Remote
control unit
[1. ADJUST]
S030:R DRIVE
(Red drive)
S031:G DRIVE
(Green drive)
S032:B DRIVE
(Blue drive)
(1) Receive a NTSC all-white (75% white) pattern
signal.
(2) Set VIDEO STATUS to [STANDARD].
(3) Set ASPECT to [FULL].
(4) Set COLOR TEMPERATURE to [LOW].
(5) Select [1.ADJUST] from the SERVICE MENU.
(6) Fix one of < S030 > (Red drive), < S031 > (Green
drive) or < S032 > (Blue drive). Then, lower the other
two that are not fixed so that the all-white screen is
equally white throughout.
(7) Adjust one or more of < S030 > (R.DRIVE), < 031 >
(G DRIVE) and < 032 > (B DRIVE) to set values [128].
(8) Check that white balance is properly tracked from
low light to high light. If the white balance tracking is
deviated, adjust to correct it.
(9) Press the [MUTING] key to memorized the set
value.
Item
Measuring
instrument
Test point Adjustment part Description
MTS INPUT
LEVEL
adjustment
Remote
control unit
[1. ADJUST]
T001:IN LEVEL
(1) Select the [1.ADJUST] from the SERVICE MENU.
(2) Select the <T001> (IN LEVEL).
(3) Set the <T001> (IN LEVEL) to initial setting value.
(4) Press the [MUTING] key to memorized the set
value.
MTS
SEPARATION
adjustment
TV audio
multiplex
Oscilloscope
Remote
control unit
[1. ADJUST]
T002: LOW SEP
T003: HIGH SEP
(1) Input stereo L signal (300Hz) from the TV audio
multiplex signal generator to the antenna terminal.
(2) Connect an oscilloscope to L OUTPUT pin of the
AUDIO OUT, and display one cycle portion of the
300Hz signal.
(3) Change the connection of the oscilloscope to R
OUTPUT pin of the AUDIO OUT, and enlarge the
voltage axis.
(4) Select <T002> (LOW SEP.).
(5) Set the initial setting value of <T002> (LOW SEP.).
(6) Adjust <T002> (LOW SEP.) so that the stroke
element of the 300Hz signal will become minimum.
(7) Change the signal to 3kHz, and similarly adjust
<T003> (HIGH SEP.).
(8) Press the [MUTING] key to memorized the set
value.
L-Channel
signal waveform
R-Channel
crosstalk portion
Minimum
1 cycle
33


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