Sony ICF-M760S / ICF-M760SL Service Manual ▷ View online
– 5 –
CABINET (REAR) ASS’Y
Note:
Follow the disassembly procedure in the numerical order given.
SECTION 2
DISASSEMBLY
CHASSIS ASS’Y
1
battery case lid
2
handle
3
six screws
(BTP 3
(BTP 3
×
14)
4
cabinet (rear) ass’y
1
lead wire
2
lead wire
4
chassis ass’y
3
lead wire
– 6 –
MAIN, KEY BOARD
1
three claws
3
ring spring (jog)
2
knob (jog)
4
adaptor (jog)
5
two knobs (control)
6
Break the soldering
of flat wire.
of flat wire.
8
three claws
9
MAIN board
0
two claws
!¡
two claws
!™
KEY board
4
battery lead
5
lead wire
6
lead wire
POWER, INLET BOARD
8
POWER board
9
shield plate (transformer)
0
two screws
(P 2.6
(P 2.6
×
8)
!¡
INLET board
3
speaker lead
1
screw
(P 2.6
(P 2.6
×
8)
7
three screws
(P 2.6
(P 2.6
×
8)
2
lug
7
Break the soldering
of lead wire.
of lead wire.
– 7 –
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.
– 8 –
+
–
–
• Adjustment Location
[MAIN BOARD]
– Component side –
L1
L4
L3
L2
CT2
CT1
JW104
L103 CT101
IC101
T101
MW/LW
FREQUENCY
COVERAGE
SW
FREQUENCY
COVERAGE
digital voltmeter
FM
TRACKING
FM
FREQUENCY
COVERAGE
L104
MW/LW
TRACKING
SW
TRACKING
AM IF
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