Sony XR-C543SP Service Manual page 19

FM Stereo Separation Adjustment
Setting:
SOURCE button: FM
FM RF signal
generator
antenna jack
set
Carrier frequency : 98.0 MHz
Output level : 70 dB (3.2 mV)
Mode : stereo
Modulation : main: 1 kHz, 33.75 kHz deviation (45%)
sub: 1 kHz, 33.75 kHz deviation (45%)
19 kHz pilot: 7.5 kHz deviation (10%)
Procedure:
FM Stereo
Level meter
signal generator
connection
output channel
L-CH L-CH
R-CH L-CH
R-CH R-CH
L-CH R-CH
L-CH Stereo separation: A-B
R-CH Stereo separation: C-D
The separations of both channels should be equal.
Specification: Separation more than 26 dB
Adjustment Location: See page 21.
level meter
10 k Ω
+
–
LINE OUT
Level meter
reading (dB)
A
B
Adjust RV4 on TU1
for minimum reading.
C
D
Adjust RV4 on TU1
for minimum reading.
– 19 –
MW Auto Scan/Stop Level Adjustment
Setting:
SOURCE and MODE button: MW
AM RF signal
generator
AM dummy antenna
(50 Ω )
Carrier frequency : 999 kHz
30% amplitude
modukation by
1 kHz signal
Output level : 33 dB (44.7 µV)
Procedure:
1. Set to the test mode. (See page 17.)
2. Push the MODE button and set to MW.
Display
MW
3. Push the preset 3 button.
Display
MW
3
4. Adjust with the volume RV1 on TU1 so that the "MW" indi-
cation turns to "MW0" indication on the display window.
But, in case of already indicated "MW0", turn the RV1 so that
put out light "0" indication and adjustment.
Display
MW
3
Adjustment Location: See page 21.
30 Ω 15 pF
65 pF
set
antenna jack
999
SHUF1
999
SHUF1
999
SHUF1