JVC AV-65WP74/HA Service Manual page 65

Measuring
Item
instrument
MTS INPUT Remote
control unit
LEVEL
check
MTS TV audio
multiplex
SEPARATION
signal
adjustment
generator
Oscilloscope
Remote
control unit
L-Channel
signal waveform
1 cycle
Test point Adjustment part
[1.PICTURE/SOUND]
A01 : IN LEVEL
AUDIO OUT [1.PICTURE/SOUND]
L output A02: LOW SEP.
R output A03 : HI SEP.
R-Channel
crosstalk portion
Minimum
Description
(1) Select 1.PICTURE / SOUND from SERVICE MENU.
(2) Select <A01> (IN LEVEL).
(3) Verify that<A01> is set at its initial setting value.
(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 <A02> (LOW SEP.).
(5) Set the initial setting value of <A02>.
(6) Adjust <A02> so that the stroke element of the
300Hz signal will become minimum.
(7) Change the signal to 3kHz, and similarly adjust
<A03> (HI SEP.).
AV-65WP74
(No.52096)1-65