Sony XR-C6200 Service Manual page 16

FM Stereo Separation Adjustment
Setting:
[SOURCE]
button
FREQUENCY SELECT switch : FM 200 k
FM RF signal
antenna jack (J1)
generator
0.01 µ F
Carrier frequency : 97.9 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
R-CH
R-CH
L-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 30 dB
Adjustment Location: See page 17.
: FM
level meter
10 k Ω
+
set
–
AUDIO OUT REAR jack (J331)
Level meter
reading (dB)
A
L-CH
B
L-CH Adjust RV4 on TU1
for minimum reading.
C
R-CH
D
R-CH Adjust RV4 on TU1
for minimum reading.
MW Auto Scan/Stop Level Adjustment
Make this adjustment after "FM Auto Scan/Stop Level Adjust-
ment".
Setting:
[SOURCE]
button
FREQUENCY SELECT switch : MW 10 k
AM RF signal
generator
AM dummy antenna
(50 Ω )
Carrier frequency : 1,000 kHz
30% amplitude
modulation by
1 kHz signal
: 33 dB (44.7 µ V)
Output level
Procedure:
1. Set to the test mode. (See page 14)
[SOURCE]
2. Push the
[MODE]
3. Push the
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.
Adjustment Location: See page 17.
– 16 –
: MW
30 Ω 15 pF
65 pF
set
antenna jack (J1)
button and set to FM.
button and set to MW.
Display
Display
SHUF
SHUF