– 7 –
– 8 –
ICF-403S
5-1. PRINTED WIRING BOARDS
D1
B-7
D2
B-7
D3
A-2
IC1
C-4
Q1
C-5
Ref. No.
Location
r
Semiconductor
Location
SECTION 5
DIAGRAMS
GND
GND
FM DISCRI
NF
VOL
AM OSC
AFC
FM OSC
Reg OUT
FM RF
AM ANT
N. C
FM ANT
FE GND
MIX OUT
21
22
23
24
25
26
27
28
29
30
2
3
5
4
6
7
8
9
10
1
11
12
13
14
15
16
17
18
19
20
AF POWER AMP
AM IF DET AGC
AM FE
FM
DISCRIMINATOR
FM FE
TUNING
METER
FM IF
GND
GND
AF OUT
Vcc
RIPPLE
FILTER
AF IN
DET OUT
AFC AGC
AFC AGC
IF GND
LED
N. C
FM IF IN
AM IF IN
FM/AM
BAND
SELECT
r
IC Block Diagram.
02
2
1
3
4
5
6
7
8
9
A
B
C
D
D3
TUNE
S2
TONE
HIGH
LOW
RV1
POWER/VOL
R3
C30
C23
R6
C22
C28
C25
R13
C18
R9
R2
C6
C5
C2
C1
C3
C9
C11
C27
C42
C13
C15
C31
C24
R1
R5
R10
R11
DC IN 4.5V
[MAIN BOARD]
ANT1
FM/SW TELESCOPIC ANTENNA
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
3PCS, 4.5V
CT6
CT5
CV1-4
TUNING
L6
L2
L5
-1
-2
-4
-5
-6
-3
S1
SW
N
MW
N
FM
L3
L4
JW1
JW2
JW7
BPF1
1
5
10
15
16
20
26
30
IC1
JW5
JW4
JW8
JW3
JW6
JW15
JW14
C7
C8
CF3
C14
C21
C26
C29
C16
C20
C19
C32
JW10
JW11
JW12
JW13
CF2
CF1
T1
BCE Q1
D2 D1
L1
MW FERRITE-ROD ANTENNA
11
(11)
1-674-016-
J2
SP1
SPEAKER
–
+
J1
@
JW9
CV1 CV2
CV3
CV4
CT3
CT4
CT1
CT2
EXCEPT EA MODEL
Note:
•
X
: parts extracted from the component side.
•
¢
: internal component.
•
b
: Pattern from the side which enables seeing.
• Abbreviation
EA
: Saudi Arabia
IC1 CXA1019S
