JVC AV-56P776 Service Manual page 52

4.6.5 MTS ADJUSTMENT
Measuring
Item
instrument
MTS INPUT Remote
LEVEL control unit
MTS TV audio
SEPARATION multiplex
signal
generator
Oscilloscope
Remote
control unit
L-Channel
signal waveform
1 cycle
Test point Adjustment part
[1.PICTURE/SOUND]
A01: IN LEVEL
R OUT [1.PICTURE/SOUND]
L OUT A02: LOW SEP
[AUDIO OUT] A03: HI SEP
R-Channel
crosstalk portion
Minimum
Description
(1) Receive the any broadcast.
(2) Select the 1.PICTURE/SOUND from the SERVICE
MODE.
(3) Select the < A01 > (IN LEVEL).
(4) Set the intal setting value of the < A01 >.
(5) 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 AUDIO
OUT, and display one cycle portion of the 300Hz
signal.
(3) Change the connection of the oscilloscope to R OUT
pin of the AUDIO OUT, and enlarge the voltage axis.
(4) Select 1.PICTURE/SOUND from the SERVICE
MODE.
(5) Select the < A02 > (LOW SEP).
(6) Set the initial setting value of the < A02 > (LOW
SEP).
(7) Adjust the < A02 > so that the stroke element of the
300Hz signal will become minimum.
(8) Select the < A03 > (HI SEP).
(9) Change the signal to 3kHz, and similarly adjust the
< A03 > (HI SEP).
(10) Press the [MUTING] key to memorize the set value.
(No.YA318)1-51