Sony ICF-703 / ICF-703L Service Manual ▷ View online
– 5 –
2-3. MAIN BOARD, LED BOARD
2-4. SETTING THE POINTER
1
knob (control)
8
BTP 3x10
9
BTP 3x10
7
claws
qa
MAIN board
5
BTP 2.6x5
6
LED board
2
knob (band)
3
chassis
0
4
Removal the solder.
1
rack (pointer)
rack (pointer)
2
pointer
• Setting the Pointer
A
1. Turn the Knob (Tuning) in the direction of
A
until it is stopped.
2.Place the rack as shown in the figure.
3.Mount the pointer.
3.Mount the pointer.
– 6 –
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
AM RF signal
generator
generator
400Hz, 30%
AM modulation
Output level: as low as possible
AM modulation
Output level: as low as possible
• 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.
ICF-703:
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L4
86.5 (87.35) MHz
CT1-3
109.5 (108.25) MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L6, L7
86.5 (87.35) MHz
CT1-4
109.5 (108.25) MHz
NOTE :
( ) : Italian model
ICF-703L:
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L4
86.5 MHz
CT1-3
109.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L6, L7
86.5 MHz
CT1-4
109.5 MHz
SECTION 3
ELECTRICAL ADJUSTMENTS
FM SECTION
BAND switch : FM
telescopic
antenna terminal
antenna terminal
0.01
µ
F
FM RF signal
generator
generator
400Hz, 30% FM modulation
frequency deviation
frequency deviation
±
22.5kHz
Output level: as low as possible
set
16
Ω
set
earphone jack (EPJ1)
level meter
• 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.
AM/MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L5
520 (516.5) kHz
CT1-2
1,650 (1,631.5) kHz
AM/MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1-1
600 (620) kHz
CT1-1
1,400 kHz
NOTE :
( ) : Italian model
AM/MW IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
455 kHz
AM (703)/MW (703L) SECTION
BAND switch : AM
16
Ω
set
earphone jack (EPJ1)
level meter
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
AM RF signal
generator
generator
400Hz, 30%
AM modulation
Output level: as low as possible
AM modulation
Output level: as low as possible
16
Ω
set
earphone jack (EPJ1)
level meter
– 7 –
– 8 –
• 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.
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
CT6
145 kHz
<confirmation>
265 kHz
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1-2
160 kHz
CT5
240 kHz
Adjustment Location: MAIN BOARD
ICF-703L:
LW SECTION
BAND switch : LW
CT5
LW TRACKING(703L)
ADJUSTMENT
CT1-2
AM(703)/MW(703L)
FREQUENCY
COVERAGE
ADJUSTMENT
L4
FM FREQUENCY
COVERAGE
ADJUSTMENT
CT1-1
AM(703)/MW(703L)
TRACKING
ADJUSTMENT
L6,7
FM TRACKING
ADJUSTMENT
T1
AM(703)/MW(703L)
IF
ADJUSTMENT
CT1-4
FM
TRACKING
ADJUSTMENT
CT1-3
FM
FREQUENCY
COVERAGE
ADJUSTMENT
L5
AM(703)/MW(703L)
FREQUENCY
COVERAGE
ADJUSTMENT
– MAIN BOARD (COMPONENT SIDE) –
CT6
LW
FREQUENCY
COVERAGE (703L)
ADJUSTMENT
L1-1
AM(703)/MW(703L)
TRACKING
ADJUSTMENT
L1-2
LW (703L)
TRACKING
ADJUSTMENT
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
10
11
12
13
14
15
IC1
D401
D402
R14
Q5
C403
C404
C401
R401
R402
R302
D301
R301
C19
C18
JC3
C12
C20
C9
C3
C4
R12
C16
C17
C25
C24
R13
C23
C8
R10
C6
C1
C2
R1
R7
R3
C37
L8
JC4
JC8
JC402
JC7
JC1
JC2
JC12
JC11
JC6
JC10
JC9
JC5
B
C
E
Q4
B
C
E
Q1
B
C
E
Q3
B
C
E
Q2
B
C
E
D1
TP10
TP9
TP9
TP3
CF3
CF2
TP1
BPF1
CF4
C10
TP2
C7
TP11
TP8
TP7
TP6
TP12
C14
C21
C22
C15
C13
CF1
TP404
TP406 TP405
TP402
TP403
CN301
TP311
TP310
04
MAIN BOARD
POWER BOARD
KEY BOARD
CN1
L5
MW OSC
L1
L4
L6
FM RF
T1
RV2
TONE
RV1
VOL
VOL
S2
(BAND)
AM/M FM/U
S1
(BAND)
LW/K MW/M FM/U
T401
POWER
TRANSFOMER
C406
TP401
L401
JW401
S401
CN401
1-677-379-
1-677-381-
11
1-677-380-
11
11
1
5
1
3
CT5
CT6
CV1
TUNING
ANT1
FM
TELESCOPIC
ANTENNA
C31
1
15
1
3
16
30
PNK
BLU
L7
CT1-4
CT1-3
CT1-2
CT1-1
-3
-4
-1
-2
ACJ1
~ AC IN
EPJ1
v
S401
OPERATION
ON
STANDBY
DRY BATTERY
SIZE " D "
(IEC DESIGNATION R20)
3PCS, 4.5V
C402
SP1
SPEAKER
BLU
PNK
D301
TUNE
BLU
PNK
GRN
CLEAR
BLU
BLK/RED
RED
GRN
BLU
BLK
RED
CLEAR
BLU
L1
FERRITE-ROD
ANTENNA
L1-2
LW(703L)
(703L)
L1-1
AM(703)
MW(703L)
BLU
(703L)
(703)
(703L)
(703L)
(703)
(703)
-1
-2
-4
-3
(703)
(703)
(703)
(703L)
ICF-703/703L
– 9 –
– 10 –
4-1. PRINTED WIRING BOARDS
Note:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
f
: internal component.
• b
: Pattern from the side which enables seeing.
SECTION 4
DIAGRAMS
D1
C-9
D401
D-4
D402
D-4
IC1
C-11
Q1
B-11
Q2
B-10
Q3
B-10
Q4
B-10
Q5
B-9
• Semiconductor
Location
Ref. No.
Location
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