Sony CDX-3167 - Further Electrical Adjustments; FM Stereo Separation and SENS Adjustments; FM Auto Scan;Stop Level Adjustment

– 16 –
FM stereo
Level meter Level meter
signal generator
connection reading (dB)
output channel
L-CH L-CH A
B
R-CH L-CH Adjust RV2 on TU1 for
maximum reading.
R-CH R-CH C
D
L-CH R-CH Adjust RV2 on TU1 for
maximum reading.
dummy
antenna
antenna
terminal
50 Ω
50 Ω
set
FM RF signal
generator
Carrier frequency : 98.1 MHz
Output level : 22 dB (12.6 µV)
Mode : mono
Modulation : 1 kHz, 22.5 kHz deviation (30 %)
FM Auto Scan/Stop Level Adjustment
Setting :
SOURCE button : FM
digital
voltmeter
+
–
AM VT OUT
Procedure :
Adjust for following value reading on digital voltmeter.
Frequency Display 530 kHz 1,710 kHz
Reading on Digital voltmeter 1.43 ± 0.05 V 6.8 ± 0.5 V
Adjustment Part T9 (confirmation)
Adjustment Location : See page 18.
digital
voltmeter
+
–
FM SD OUT
Procedure :
1. Adjust RV3 on TU1 so that the reading on the digital voltmeter
changes point from minimum to maximum. (approx. 0.6 V)
2. Confirm that the set stops auto-scanning with FM RF signal
generator output level set at 22 ± 2 dB.
Adjustment Location : See page 18.
dummy
antenna
antenna
terminal
set
level
meter
60 pF
+
–
30 Ω
15 pF
LINE OUT REAR
10 k Ω
AM RF signal
generator
AM VT Voltage Adjustment
Setting :
SOURCEnMODE button : AM
FM Stereo Separation Adjustment
Setting :
SOURCE button : FM
antenna
terminal
dummy
antenna
FM RF signal
generator
50 Ω
50 Ω
+
set
–
LINE OUT REAR
10 k Ω
level
meter
Carrier frequency : 98.1 MHz
Output level : 70 dB (3.2mV)
Mode : stereo
modulation : main : 1 kHz, 20 kHz deviation (53%)
sub : 1 kHz, 20 kHz deviation (53%)
19 kHz pilot : 7.5 kHz deviation (10%)
Procedure :
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 18.
FM SENS/IF Adjustment
Setting :
SOURCE button : FM
antenna
terminal
dummy
antenna
FM RF signal
generator
50 Ω
50 Ω
+
set
–
LINE OUT REAR
Procedure :
Adjust for a maximum reading on level meter.
T1–T3
87.5 MHz
Adjustment Location : See page 18.
10 k Ω
level
meter