AV-48WP74
AV-56WP74
1-62 (No.52105)
MTS INPUT
LEVEL
check
Remote
control unit
[1.PICTURE/SOUND]
A01 : IN LEVEL
(1) Select 1.PICTURE / SOUND from SERVICE MENU.
(2) Select <A01> (IN LEVEL).
(3) Verify that<A01> is set at its initial setting value.
MTS
SEPARATION
adjustment
TV audio
multiplex
signal
generator
Oscilloscope
Remote
control unit
AUDIO OUT
L output
R output
[1.PICTURE/SOUND]
A02: LOW SEP.
A03 : HI 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 <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.).
Item
Measuring
instrument
Test point
Adjustment part
Description
L-Channel
signal waveform
R-Channel
crosstalk portion
Minimum
1 cycle