Sony CDX-2250 - Electrical Adjustments: AM Tuning; AM Auto Scan;Stop Level Calibration

– 17 –
Carrier frequency : 1000 kHz
30% amplitude
modulation by
1 kHz signal
output level : 33 dB (44.7 µV)
Procedure:
1. Adjust IFT3 on TU01 so that the reading on the digital
voltmeter is 1.5 ± 0.2 V.
Adjustment Location: tuner unit (TU01)
AM Auto Scan/Stop Level Adjustment
Setting:
SOURCE n MODE button : AM
D-BASS switch : OFF
Frequency Select switch (E model): AM 10K
AM RF signal
generator
dummy
antenna
antenna
terminal
set
SPEAKER OUT
level
meter
+
–
30 Ω
4 Ω
15 pF
30 pF
+
–
digital
voltmeter
S-METER OUT
Adjustment Location: tuner unit (TU01)
– tuner unit (TU01) (component side) –
AM AUTO
SCAN/STOP
LEVEL ADJ
IFT3
AM SENS
ADJ
IFT3 IFT1
FEB1
FM SENS/IF
ADJ
IFT4
FM CENTER
ADJ
– tuner unit (TU01) (conductor side) –
IC1
R24
S-METER
OUT
FM CENTER
OUT
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