Sony ICF-M760L 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
(BTP3
(BTP3
×
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
(P2.6
(P2.6
×
8)
!¡
INLET board
3
speaker lead
1
screw
(P2.6
(P2.6
×
8)
7
three screws
(P2.6
(P2.6
×
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
87.5 MHz
CT101
108 MHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a reading on digital voltmeter.
L2
531 kHz
2.8 ± 0.1 V
Confirm
1602 kHz
8.8 ± 1 V
Note
:
Not use the AM RF signal generator in this adjustment.
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1–1
603 kHz
CT1
1404 kHz
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a reading on digital voltmeter.
CT2
153 kHz
2.3 ± 0.1 V
Confirm
279 kHz
8.1 ± 1 V
Note
:
Not use the AM RF signal generator in this adjustment.
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1–2
162 kHz
CT3
243 kHz
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T101
450 kHz
+
–
–
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.
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
BAND switch: MW/LW
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 –
– Component side –
L2
CT2
CT1
JW104
IC101
T101
MW
FREQUENCY
COVERAGE
digital voltmeter
FM
TRACKING
FM
FREQUENCY
COVERAGE
L104
MW
TRACKING
CT3
L1–1
L1–2
LW
FREQUENCY
COVERAGE
LW
TRACKING
L103 CT101
AM IF
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