Sony XR-C7220, Руководство по обслуживанию

Страница: 15 / 40

– 15 –
FM Stereo Separation Adjustment
Setting:
[SOURCE]
button : FM
FREQUENCY SELECT switch : FM 200 k
Procedure:
FM Stereo
Level meter Level meter
signal generator
connection reading (dB)
output channel
L-CH L-CH
A
B
R-CH L-CH Adjust RV4 on TU1
for minimum reading.
R-CH R-CH
C
D
L-CH R-CH Adjust RV4 on TU1
for minimum reading.
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 16.
FM RF signal
generator
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%)
0.01
µ
F
set
antenna jack (J1)
+
–
AUDIO OUT REAR jack
(CNJ151)
level meter
10 k
Ω
MW Auto Scan/Stop Level Adjustment
Setting:
[SOURCE]
and
[MODE]
buttons : MW
FREQUENCY SELECT switch : MW 10 k
AM RF signal
generator
Carrier frequency : 1000 kHz
30% amplitude
modulation by
1 kHz signal
Output level
: 33 dB (44.7
µ
V)
(50
Ω
)
set
AM dummy antenna
30
Ω
15 pF
65 pF
antenna jack (J1)
Procedure:
1. Set to the test mode. (See page 13)
2. Push the
[SOURCE]
button and set to FM.
3. Push the
[MODE]
button and set to MW.
Display
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
Adjustment Location: See page 16.
TP SHUF
TP SHUF