Read Sony ICF-M760S / ICF-M760SL Service Manual online
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SECTION 3
ELECTRICAL ADJUSTMENTS
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a reading on digital voltmeter.
L104
87.5 MHz
2.7 ± 0.1 V
Confirm
108 MHz
10.2 ± 1 V
Note
:
Not use the FM RF signal generator in this adjustment.
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L103
108 MHz
CT101
87.5 MHz
(M760S)
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a reading on digital voltmeter.
L2
531 kHz
1.6 ± 0.1 V
Confirm
1602 kHz
8.5 ± 1 V
Note
:
Not use the AM RF signal generator in this adjustment.
(M760S)
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
603 kHz
CT2
1404 kHz
(M760SL)
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a reading on digital voltmeter.
L2
153 kHz
1.4 ± 0.1 V
Confirm
279 kHz
7.9 ± 1 V
Note
:
Not use the AM RF signal generator in this adjustment.
(M760SL)
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
162 kHz
CT2
243 kHz
SW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a reading on digital voltmeter.
L4
5,800 kHz
1.75 ± 0.1 V
Confirm
15,600 kHz
8.5 ± 1 V
Note
:
Not use the AM RF signal generator in this adjustment.
SW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
5,800 kHz
CT1
15,600 kHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T101
450 kHz
Note: Receive
531 kHz (M760S)
153 kHz (M760SL)
153 kHz (M760SL)
+
–
–
level meter
set
EARPHONE jack
32
Ω
JW104
+
–
–
digital voltmeter
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
• Abbreviation
M760S: ICF-M760S
M760SL: ICF-M760SL
M760SL: ICF-M760SL
FM SECTION
Setting:
BAND switch: FM
BAND switch: FM
FM RF signal
generator
generator
400 Hz, 30% FM modulation
frequency deviation ± 22.5 kHz
Output level: as low as possible
frequency deviation ± 22.5 kHz
Output level: as low as possible
telescopic antenna
input
input
AM SECTION
Setting:
BAND switch: MW/LW/SW
BAND switch: MW/LW/SW
AM RF signal
generator
generator
400 Hz, 30%
AM modulation
Output level: as low as possible
AM modulation
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
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