Sony CDX-C460 - Fm/am Compact Disc Player, Руководство по обслуживанию

Страница: 23 / 50

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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 23 dB
Adjustment Location : See page 24.
Procedure :
FM Stereo Separation Adjustment
Setting :
D-BASS switch (CDX-C460) : OFF
SOURCE button : FM
FREQUENCY SELECT switch (E model) : FM 200k
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%)
antenna
terminal
set
0.01 µF
10 k Ω
level meter
LINE OUT REAR
AM Auto Scan/Stop Level Adjustment
Setting :
D-BASS switch (CDX-C460) : OFF
SOURCE n MODE button : AM
FREQUENCY SELECT switch (E model) : AM 10k
AM RF signal
generator
Carrier frequency : 1000 kHz
30% amplitude
modulation by
1 kHz signal
output level
: 33 dB (44.7 µV)
AM dummy
antenna (50
Ω )
antenna
terminal
set
15 pF 30
Ω
65 pF
Procedure :
1. Set to the test mode. (See page 22.)
2. Push the SOURCE button.
3. Push the MODE button and set to AM.
Display
4. Push the preset 3 button.
Display
5. Adjust with the volume RV1 on TU1 so that the “AM”
indication turns to “AM0” indication on the display window.
But, in case of already indicated “AM0”, turn the RV1 so that
put out light “0” indication and adjustment.
Display
Adjustment Location : See page 24.
SHUF1
SHUF1
SHUF1
TP
TP
TP