No.52003
AV-36F703
AV-36F713
AV-36F803
30
ADJUSTMENT OF MTS CIRCUIT
Item
Measuring
instrument
Test point
Ad justment part
Description
MTS INPUT
LEVEL
Ad justment
Sophometer
Remote
control unit
AUDIO
OUT R pin
A01:IN LEVEL
1. Receive the cross-hatch signal (c ros s-hatch / 400Hz)
2. Enter the SERVICE MENU.
3. Select
the
A01:IN LEVEL
of the 3:SOUND(A) MODE.
4. Verify that
the
A01:IN LEVEL
is s et at its initial setting value.
5. Connect the sophometer to AUDIO OUT R pin.
6. Adjust the MTS input level to 500mV(rms) by
A01:IN LEVEL
with remote c ontrol unit.
7. Press the EXIT key to return to the SERVICE MENU screen.
MTS
SEPARATION
adjustment
TV audio
multiplex
signal
generator
Oscilloscope
Remote
control unit
R OUT
L OUT
[AUDIO OUT]
A02:LOW SEP.
A03:HI SEP.
1. Input the stereo L signal (300Hz) from the TV audio multiplex
signal generator to the antenna terminal.
2. Connect an oscilloscope to
R OUT
pin of the AUDIO OUT, and
display one c ycle portion of the 300Hz signal.
3. Enter the SERVICE MENU.
4. Select
the
A02:LOW SEP.
of the 3:SOUND(A) mode.
5. Set the initial s etting value of the
A02:LOW SEP.
with the
FUNCTION ( / ) key.
6. Adjust the
A02:LOW SEP.
so that the stroke element of the
300Hz signal will bec ome minimum.
7. Change the c onnection of the oscilloscope to
L OUT
pin of the
AUDIO OUT , and enlarge the voltage axis.
8. Change the signal to 3kHz, and similarly adjust the
A03:HI SEP.
9. Press the EXIT key to return to the SERVICE MENU screen.
L-Channel
signal waveform
R-Channel
crosstalk portion
Minimum
1 cycle
No .
Setting item
Variable
range
Initial setting
value
A02
LOW SEP.
0
～
63
032
A03
HI SEP.
0
～
63
032
No .
Setting item
Variable
range
Initial setting
value
A01
IN LEVEL
0
～
15
010
