Sony CDX-4480ESP Service Manual page 18

AM Auto Scan/Stop Level Adjustment
Setting:
SOURCE n MODE button
D-BASS switch
FREQUENCY SELECT switch : AM 10K
AM RF signal
dummy
generator
antenna
30 Ω 15 pF
30 pF
Carrier frequency: 1000 kHz
30% amplitude
modulation by
1 kHz signal
: 33 dB (44.7 µ V)
output level
Adjustment Location: tuner assy (TU1)
– tuner assy (TU1) (component side) –
AM AUTO
SCAN/STOP
LEVEL ADJ
IFT3
– tuner assy (TU1) (conductor side) –
: AM
: OFF
level
antenna
meter
terminal
4 Ω
+
set
–
SPEAKER OUT
AM SENS
ADJ
IFT3
IFT4
FM CENTER
ADJ
S-METER OUT
Procedure:
1. Adjust IFT3 on TU1 so that the reading on the digital
voltmeter is 1.5 ± 0.2 V.
Adjustment Location: tuner assy (TU1)
IFT1
FEB1
FM SENS/IF
ADJ
IC1
R24
S-METER
OUT
– 18 –
digital
voltmeter
+
–
'
FM CENTER
OUT
'