JVC AV-27D201 Service Manual page 27

ADJUSTMENT OF MTS CIRCUIT
Measuring
Item
instrument
Remote
MTS INPUT
LEVEL
control unit
check
MTS STEREO Signal
VCO generator
adjustment
Frequency
counter
Remote
control unit
MTS SAP Signal
VCO generator
adjustment
Remote
control unit
MTS FILTER Remote
check control unit
Test point Adjustment part
No.2 IN LEVEL
R OUT
No.3 FH MONITOR
No.4 STEREO VCO
[AUDIO OUT]
" MPX# " #
" " # #
No.9 5FH MON.
No.10 SAP VCO
Connector
" " " 4# " # pin SDA # #
" 3# " # pin GND
" " # #
[AV
SELECTOR
PWB]
R OUT
[AUDIO OUT]
No.6 FILTER
No. 51686
Description
1. Select the No.2 IN LEVEL of the SOUND MODE.
2. Verify that the No.2 IN LEVEL is set at its initial setting value.
1. Input the RF signal (non-modulated sound signal) from the
antenna terminal.
2. Select the No.3 FH MONITOR of SOUND MODE, and change
the setting value from 0 to 1.
3. Connect the frequency counter to R out RCA pin of the AUDIO
OUT.
4. Select the No.4 STEREO VCO.
5. Set the initial setting value of the No.4 STEREO VCO with the
LEFT/RIGHT key of the menu.
6. Adjust the No.4 STEREO VCO so that the frequency counter
will display 15.73kHz  0.1kHz.
7. Select the No.3 FH MONITOR of the SOUND MODE, and
reset the setting value from 1 to 0.
1. Receive the RF signal (non-modulated sound signal) from the
antenna terminal.
2. Connect between pin " 4 # of " MPX # connector and GND (Pin
" 3 # of " MPX # connector) through 1M  resistor.
3. Select the No.9 5FH MON. of the SOUND MODE, and reset
the setting value from 0 to 1.
4. Connect the frequency counter to R out RCA pin of the AUDIO
OUT.
5. Select the No.10 SAP VCO.
6. Set the initial setting value of No.10 SAP VCO with the
LEFT/RIGHT key of the menu.
7. Adjust the No.10 SAP VCO so that the frequency counter will
display 78.67kHz  0.5kHz.
8. Select the No.9 5FH MON. of the SOUND MODE, and reset
the setting value from 1 to 0.
1. Select the No.6 FILTER of the SOUND MODE.
2. Verify that the No.6 FILTER is set at its initial setting value.
AV-27D201
AV-32D201
27