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4-1. Block Diagram
S1
FM SENS
LOCAL
DX
Q1
BPF1
RF
B.P.F.
AMP
Q2
VCC
VCC
VCC
CT1
L1
D1
L1, CT1
FM
D2
TRACKING
L2
D3
L3
D4
FERRITE-ROD
ANTENNA
Q5
CT2
RF
L3, CT2
AMP
AM
TRACKING
L4
AM
L4
FREQUENCY
COVERAGE
VCC
VCC
T101
Q106, 107
DC-DC
CONV
Q104,105
L.P.F
40
COM1 COM4
1
4
LIQUID CRYSTAL
IC1
FRONT-END
IF AMP,DET,FM MPX
CF1
10.7MHz
FM MIX
FM RF IN
FM
2
4
MIX
CF2
FM RF OUT
29
AM MIX
450kHz
5
VCC
FM OSC
FM
24
OSC
AM RF IN
AM
27
OSC
MIX
OUT
23
AM OSC
AM
25
OSC
Q7, 8
Q6
BUFFER
VCC
29
38
IC101
DIGITAL TUNING
SYSTEM CONTROL
S1 S13
5
17
55
56
34
X101
75kHz
ON
LCD101
S101
DISPLAY
HOLD
VCC
CF3
10.7MHz
11
26
7
QUAD
RF VCC VCC
FM IF IN
FM
8
DET
MPX
DET
FM/AM
OUT
IN
12
13
BUFFER
AM IF IN
AM
10
DET
14
21
22
Q3
Q4
SWITCH
50
32
31
23
24
25 26
20
21
22
OFF
S102 - S112
KEY MATRIX
7
7
RV1
IC2
VOL
AUDIO
POWER AMP
4
OUT 2
7
IN 2
LOUT
2
IN 1
OUT 1
9
16
FM
MPX
15
ROUT
5
REF
10
MUTE SW
BATT
Q101, 102
VCC
49
28
POWER ON 1 52
VDD
IC103
RESET 54
RESET
POWER ON 2 46
IC102
VOLTAGE
VDET 35
1
2
DETECT
SRF-M37
J1
• Signal Path
: FM
: AM
D101
DRY BATTRY
SIZE "AAA"
(IEC DESIGNATION R03)
Q103
1PC 1.5V
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