JVC AV-T2122 Service Manual page 16

AV-T2122
MTS ADJUSTMENT
Measuring
Item
instrument
INPUT LEVEL
adjustment
STEREO VCO Signal
adjustment generator
Frequency
counter
SAP VCO Signal
adjustment generator
Frequency
counter
FILTER
check
22
Test point Adjustment part
No.2 IN LEVEL
MPX No.3 FH MON
Connector
2 pin TVR No.4 ST VCO
[MAIN PWB]
MPX No.9 5FH MON.
Connector
No.10 SAP VCO.
4 pin SDA
3 pin GND
2 pin TVR
[MAIN PWB]
No.6 FILTER
1. Select the "No.2 IN LEVEL" of the SOUND mode in SERVICE
MENU.
2. Verify that the " No.2 IN LEVEL " is set at its initial setting
value.
1. Receive a NTSC RF signal (non modulated sound signal) from
the antenna terminal.
2. Select the "No.3 FH MON" of SOUND mode in SERVICE
MENU, change the setting value from 0 to 1.
3. Connect the frequency connector to pin
connector.
4. Select the "No.4 ST VCO".
5. Confirm the initial setting value of the "No.4 ST VCO".
6. Adjust the "No.4 ST VCO" so that the frequency counter will
display 15.73kHz ± 0.1kHz.
7. Select the "No.3 FH MON" of the SOUND mode, and reset the
setting value from 1 to 0.
1. Receive a NTSC RF signal (non modulated sound signal) from
the antenna terminal.
2. Connect between pin 4 of
MPX connector) through 1M Ω resistor.
3 of
3. Select the "No.9 5FH MON." of the SOUND mode in SERVICE
MENU, and reset the setting value from 0 to 1.
4. Connect the frequency connector to pin
MPX connector.
5. Select the "No.10 SAP VCO".
6. Confirm the initial setting value of "No.10 SAP VCO".
7. Adjust the "No.10 SAP VCO" so that the frequency connector
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 in SERVICE
MENU.
2. Verify that the "No.6 FILTER" is set at its initial setting value.
No.51866
Description
of MPX !
2
MPX connector and GND (pin
2 (R.OUT) of