Sony ICF-304 Service Manual ▷ View online
9
9
ICF-304
ICF-304
SECTION 4
DIAGRAMS
4-1. PRINTED WIRING BOARDS
: Uses unleaded solder.
Note:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
1
A
B
C
D
E
F
G
H
2
3
4
5
6
7
8
9
10
11
12
13
CT1-3
CT1-2
CT1-4
CT1-1
RV1
BATT–
BATT–
VOLUME
R5
R8
DRY BATTERY
SIZE" AA"
(IEC DESIGNATION R6)
2PCS,3V
C13
L9
1-865-180-
11
(11)
1-865-179-
11
(11)
C30
AF OUT
+B
LED +B
C20
DET
VOL
C12
C14
L6
AM OSC
CF3
C21
LED
S1
(BAND)
GRY
RED
C25
W2
GRY
J1
i
GRY
RED
RED
GR
Y
GRY
RED
W1
ANT1
FM TELESCOPE
ANTENNA
ANT
BATT+
SP+
SP–
CV1
TUNING
-1
-4
-2
-3
D3
TUNE
S3
ON
OFF
POWER
C1
R7
C18
IC1
C22
C32
C16
R10
BAND
SP–
W3
W4
SP+
SP+
T1
AM IF
GND
AM
FM
D1
RED
BP1
BPF1
ANT IN
RED
BLK
NA
T
NAT
BLK
L1
AM FERRITE ROD ANTENNA
R6
JW8
JW4
JW2
C26
JW5
JW3
C15
C4
C6
C5
C8
C27
C29
C24
C23
C3
C2
L8
1
L2
L5
CF2
CF1
L3
15
16
1
30
2
3
MAIN BOARD
JACK BOARD
SP1
SPEAKER
RF GND
REG
10
10
ICF-304
ICF-304
4-2. SCHEMATIC DIAGRAM
Note:
• All capacitors are in µF unless otherwise noted. (p: pF)
• All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
C
: panel designation.
•
A
: B+ Line.
•
H
: adjustment for repair.
• Total current is measured with power on.
• Power voltage is dc 3 V and fed with regulated dc power
• Power voltage is dc 3 V and fed with regulated dc power
supply from battery terminal.
• Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
(
) : AM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Signal path.
F
: FM
f
: AM
CF2
RV1
T1
CF1
SP1
BPF1
CV1-3
CT1-3
CT1-1
CV1-1
ANT1
D1
BP1
CV1-4
CT1-4
C5
CV1-2
R7
J1
CF3
C12
C13
TP4
R5
CT2
CT1-2
L6
L5
L2
L3
C15
C14
TP3
TP1
TP2
R6
C16
TP5
S1
C18
TP6
TP18
D3
R8
C20
C21
TP9
C23
C32
C22
C25
C26
C29
C30
C24
C27
TP7
S2
TP13
TP14
TP15
TP17
TP16
R10
TP11
TP12
C3
C1
C2
C4
C6
C8
TP8
L9
IC1
L8
L1
11
ICF-304
SECTION 5
EXPLODED VIEWS
Ref. No.
Part No.
Description
Remark
5-1. CABINET SECTION
Ref. No.
Part No.
Description
Remark
NOTE:
• The mechanical parts with no reference
number in the exploded views are not supplied.
• Items marked “*” are not stocked since
they are seldom required for routine service.
Some delay should be anticipated
when ordering these items.
Some delay should be anticipated
when ordering these items.
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
original one.
• Color Indication of Appearance Parts
Example :
KNOB, BALANCE (WHITE) ... (RED)
Parts Color Cabinet’s Color
• Accessories are given in the last of this
parts list.
• Abbreviation
AUS : Australian model
R
R
1
3-254-140-01 SCREW (B2.6), (+) BV TAPPING (for SILVER)
1
3-254-140-11 SCREW (B2.6), (+) BV TAPPING (for BLACK)
2
2-514-219-01 PLATE, ORNAMENT
3
3-254-081-01 SCREW
4
2-514-221-02 KNOB (POWER) (LIGHT GRAY)...(SILVER)
4
2-514-221-11 KNOB (POWER) (DARK GRAY)...(BLACK)
5
X-2048-433-1 CABINET (FRONT) SUB ASSY
(SILVER)...(SILVER)
5
X-2059-597-1 CABINET (FRONT) SUB ASSY
(BLACK)...(BLACK)
6
2-514-218-11 WINDOW
7
2-514-224-01 KNOB (BAND)
8
2-514-255-01 PLATE (ANT), CONTACT
9
X-2048-502-1 CABINET (REAR) ASSY (SILVER)...(SILVER) (E)
9
X-2050-144-1 CABINET (REAR) ASSY (SILVER)...(SILVER)
(AUS)
9
X-2059-593-1 CABINET (REAR) ASSY (BLACK)...(BLACK)
(AUS)
10
3-918-696-11 SCREW (M3X6 LOCK ACE) (for SILVER)
10
3-918-693-31 SCREW (M3X6 LOCK ACE) (for BLACK)
12
2-593-609-01 CUSHION (BATTERY LID)
ANT1
1-754-369-11 ANTENNA, TELESCOPIC (FM)
SP1
1-529-456-13 SPEAKER (6.6cm)
1
1
1
2
3
3
4
5
6
SP1
ANT1
7
8
9
10
12
not supplied
Ver. 1.2
12
ICF-304
5-2. MAIN BOARD SECTION
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
51
3-254-149-01 SCREW (M1.7)
52
2-514-228-01 DRUM
53
3-254-081-01 SCREW
54
A-1098-287-A MAIN BOARD, COMPLETE
55
2-514-306-01 HOLDER (LED)
56
2-514-230-01 TERMINAL (–), BATTERY
57
2-514-222-01 KNOB (VOL) (LIGHT GRAY)...(SILVER)
57
2-514-222-11 KNOB (VOL) (DARK GRAY)...(BLACK)
58
2-514-226-01 PLATE (RACK), RETAINER
59
2-514-227-01 RACK
60
3-248-610-01 TERMINAL (+), BATTERY
61
2-514-225-01 SLIDER (BAND)
62
2-514-220-01 CHASSIS
* 63
1-865-180-11 JACK BOARD
64
2-514-223-01 KNOB (TUNE)
65
3-246-344-11 FOOT, RUBBER
L1
1-456-959-11 COIL, FERRITE-ROD ANTENNA (AM)
L1
51
52
53
54
55
53
56
57
58
59
60
61
62
63
64
65
Ver. 1.2
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