Fm Thd Adjustment; Fm Search Level Adjustment; Am(Mw) I.f Adjustment; Fm Auto Search Level Adjustment - JVC MX-GA8 Service Manual

FM THD Adjustment

SSG FREQ.
Adjustment
point
FM DETECTOR COIL
(FM DET)
60 dB
Output
Minumum Distortion (0.4% below)
(Figure 1-1)

FM Search Level Adjustment

SSG FREQ.
Adjustment
BEACON
point
SENSITIVITY
(SVR1)
SEMI-VR(10K )
Output
28 dB( 2dB)
Adjust SVR1 (Figure 1-2)
*Adjust FM S.S.G level to 28dB

AM(MW) I.F Adjustment

SSG FREQ.
Frequency
Adjustment
point
Maximum output (Figure 1-3)
98 MHz
98 MHz
450 kHz
522 kHz
AM IF
FM
Output
Antenna
GND
Terminal
FM S.S.G
Speaker
Terminal
Figure1-1 IF CENTER and THD Adjustment
28 dB
GND
FM S.S.G
Figure1-2 FM Auto Search Level Adjustment
60cm
OUTPUT
AM SSG
450KHZ
INPUT
Figure1-3 AM I.F Adjustment
SET
Oscilloscope
Input
Input
output
Distortion Meter
FM Antenna
SET
FM IN
20 k
AM IF
AM ANT
IN
Speaker Terminal
OUTPUT
VTVM Oscilloscope
(No.MB080)1-21