Read Sony CDX-C4840R / CDX-C4850R Service Manual online
– 19 –
SHUF
SHUF
FM RF signal
generator
0.01
µ
F
antenna
terminal
terminal
set
+
–
FM RF signal
generator
0.01
µ
F
antenna
terminal
terminal
set
LINE OUT REAR
10 k
Ω
level meter
FM Stereo Separation Adjustment
Setting :
D-BASS switch : OFF
SOURCE button : FM
SOURCE button : FM
Carrier frequency : 98.00 MHz
Output level
Output level
: 70 dB (3.2 mV)
Mode
: stereo
Modulation
: main : 1 kHz, 20 kHz deviation (26.5%)
sub : 1 kHz, 20 kHz deviation (26.5%)
19 kHz pilot : 7.5 kHz deviation (10%)
19 kHz pilot : 7.5 kHz deviation (10%)
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 TU601
for nimum reading.
for nimum reading.
R-CH
R-CH
C
D
L-CH
R-CH
Adjust RV4 on TU601
for minimum reading.
for minimum reading.
L-CH stereo separation : A – B
R-CH stereo separation : C – D
The separations of both channels should be equal.
R-CH stereo separation : C – D
The separations of both channels should be equal.
Specification : Separation more than 28 dB
Adjustment Location : See page 20.
Procedure :
Carrier frequency : 98.00 MHz
Output level
Output level
: 35 dB (56.2
µ
V)
Mode
: mono
Modulation
: no modulation
Procedure :
1. Set to the test mode. (See page 18.)
2. Push the SOURCE button and set to FM.
1. Set to the test mode. (See page 18.)
2. Push the SOURCE button and set to FM.
Display
FM RDS S-Meter Adjustment
Setting :
D-BASS switch : OFF
SOURCE button : FM
SOURCE button : FM
3. Push the preset 10 button.
4. Adjust RV801 so that the display indication is “16.0”.
4. Adjust RV801 so that the display indication is “16.0”.
Display
Specification : Display indication : 15.8 to 16.2
Adjustment Location : See page 20.
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