ICF-DVD57TV - Sony Audio Service Manual (repair manual). Page 16

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16
ICF-DVD57TV
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
450 kHz
AM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display Reading on Digital Voltmeter
Confirmation
530 kHz
1.0 
±
 0.1 V
L4
1,710 kHz
5.3 
±
 0.7 V
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3
620 kHz
CT3
1,400 kHz
FM IF ADJUSTMENT
Adjust for a minimum reading on level meter
T2
10.7 MHz
FM VCO VOLTAGE ADJUSTMENT
Adjustment Part
Frequency Display Reading on Digital Voltmeter
Confirmation
87.5 MHz
1.3 
±
 0.2 V
L2
108 MHz
3.0 
±
 0.2 V
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
87.5 MHz
CT1
108 MHz
Adjustment and Connecting Location:
TU board (See page 17)
TUNER  SECTION
0 dB=1 
µ
V
[AM]
Setting:
Function: RADIO
Band: AM
[FM]
Setting:
Function: RADIO
Band : FM
Repeat the procedures in each adjustment several times, and
the  tracking adjustments should be finally done by the trimmer
capacitors.
AM RF signal 
generator
30% amplitude
modulation by
400 Hz signal
Output level: 
as low as possible
Put the lead-wire
antenna close to 
the set.
+
level meter
set
MAIN board
CN302 pin 
2
MAIN board
CN302 pin 
1
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: 
as low as possible
+
level meter
MAIN board
CN302 pin 
2
MAIN board
CN302 pin 
1
set
0.01 
µ
F
TU board
TP (GND)
TU board
TP (ANT)
digital voltmeter
TP (VT)
TP (GND)
100 k
TU board
SECTION  5
ELECTRICAL  ADJUSTMENTS
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