Sony CDX-3170, Service Manual

Page: 15 / 44

– 15 –
Carrier frequency : 97.9 MHz
Output level
: 22 dB (12.6
µ
V)
Mode : mono
Modulation : 1 kHz, 22.5 kHz deviation (30 %)
FM Auto Scan/Stop Level Adjustment
Setting :
SOURCE button : FMI
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 17.
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 17.
AM VT Voltage Adjustment
Setting :
SOURCE
n
MODE button : AM
FM SENS/IF Adjustment
Setting :
SOURCE button : FMI
Procedure :
Adjust for a maximum reading on level meter.
T1–T3
87.5 MHz
Adjustment Location : See page 17.
FM RF signal
generator
dummy
antenna
antenna
terminal
set
LINE OUT REAR
50 Ω
50 Ω
10 k Ω
level
meter
+
–
FM RF signal
generator
dummy
antenna
antenna
terminal
set
50 Ω
50 Ω
digital
voltmeter
FM SD OUT
+
–
AM RF signal
generator
set
LINE OUT REAR
30 Ω
10 k Ω
dummy
antenna
antenna
terminal
level
meter
15 pF
60 pF
+
–
digital
voltmeter
AM VT OUT +
–
AM IF Adjustment
Setting :
SOURCE n MODE button : AM
Procedure :
Adjust for a maximum reading on level meter.
T8
450 kHz
Adjustment Location : See page 17.
AM RF signal
generator
set
LINE OUT REAR
30 Ω
10 k Ω
dummy
antenna
antenna
terminal
level
meter
15 pF
60 pF
+
–