JVC AV-T2122 Service Manual page 17

Measuring
Item
instrument
SEPARATION TV audio
adjustment multiplex
signal
generator
Oscilloscope
L-Channel
signal waveform
1 cycle
Test point Adjustment part
MPX No.7 LOW SEP.
Connector
No.8 HI SEP.
1 pin TVL
2 pin TVR
[MAIN PWB]
R-Channel
crosstalk portion
Minimum
1. Input a stereo L signal (300Hz) from the TV Audio multiplex
signal generator to the antenna terminal. ! (NTSC)
2. Connect an oscilloscope to pin
connector, and display one cycle portion of the 300Hz signal.
3. Select the "No.7 LOW SEP." of the SOUND mode in SERVICE
MENU.
4. Confirm the initial setting value of the "No.7 LOW SEP.".
5. Adjust the "No.7 LOW SEP." so that the stroke element of the
300Hz signal will become minimum.
6. Change the connection of the oscilloscope to pin 1 (L.OUT)
of MPX connector, and enlarge the voltage axis.
7. Change the signal to 3kHz, and similarly adjust the "No.8 HI
SEP.".
No.51866
AV-T2122
Description
(R.OUT) of MPX !
2
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