Sony WX-C570, Руководство по обслуживанию

Страница: 26 / 60

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Carrier frequency : 1000 kHz
30% amplitude
modulation by
1 kHz signal
output level
: 33 dB (44.7 µV)
Procedure :
1. Set to the test mode. (See page 25.)
2. Push twice the TUNER button and set to AM.
Display
3. Push the preset 3 button.
Display
4. Adjust with the volume RV1 on TU1 so that the “AM” indica-
tion turns to “AM2” indication on the display window. But, in
case of already indicated “AM2”, turn the RV1 so that put out
light “2” indication and adjustment.
Display
antenna
terminal
Adjustment Location : See page 27.
AM Auto Scan/Stop Level Adjustment
Note : This adjustment should be performed after the FM Auto
Scan / Stop Level Adjustment is done.
Setting :
D-BASS switch : OFF
TUNER button (twice) : AM
FREQUENCY SELECT switch (UK, E model) : AM 10K
AM RF signal
generator
AM dummy
antenna (50
Ω
)
set
15 pF 30
Ω
65 pF
FM RF signal
generator
set
0.01 µF
10 k
Ω
level meter
FM Stereo Separation Adjustment
Setting :
D-BASS switch : OFF
TUNER button : FM
FREQUENCY SELECT switch (UK, E model) : FM 200K
Carrier frequency : 97.9 MHz
Output level
: 70 dB (3.2 mV)
Mode : stereo
Modulation : main : 1 kHz, 33.75 kHz deviation (45%) (US, E)
1 kHz, 20 kHz deviation (26.5%) (UK)
sub :1 kHz, 33.75 kHz deviation (45%) (US, E)
1 kHz, 20 kHz deviation (26.5%) (UK)
19 kHz pilot : 7.5 kHz deviation (10%)
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 27.
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.
Procedure :
antenna
terminal
LINE OUT REAR
SHUF1
L R
SHUF1
L R
PRESET
SHUF1
L R
PRESET