Sony CDX-C880 Service Manual page 28

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FM Stereo Separation Adjustment (WIDE)
Setting :
SOURCE button
FREQUENCY SELECT switch (E model) : FM 200K
FM RF signal
generator
antenna
terminal
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 L-CH
R-CH L-CH
R-CH R-CH
TE
L-CH L 13942296513 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 24 dB
Adjustment Location : See page 29.
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.
http://www.xiaoyu163.com
: FM
level meter
10 k Ω
set
LINE OUT REAR
Level meter
reading (dB)
A
B
Adjust RV3 on TU10 for
minimum reading.
C
D
Adjust RV3 on TU10 for
minimum reading.
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8
FM Stereo Separation Adjustment (NARROW)
Setting :
SOURCE button
FREQUENCY SELECT switch (E model) : FM 200K
FM RF signal
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 :
1. Push the SHIFT button.
2. Push the 4 button three times.
3. Push the 5 button twice and set to NARROW mode.
FM stereo
Level meter
signal generator
connection
output channel
L-CH L-CH
R-CH L-CH
Q Q
3 6 7 1 3 1 5
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 18 dB
Adjustment Location : See page 29.
co
.
9 4 2 8
: FM
level meter
antenna
10 k Ω
terminal
set
LINE OUT REAR
Level meter
reading (dB)
A
B
Adjust RV4 on TU10 for
minimum reading.
0 5 8 2 9 9 4 2 8
C
D
Adjust RV4 on TU10 for
minimum reading.
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