Read Sony SRF-M37 Service Manual online
7
7
SRF-M37
4-1.
Block Diagram
: FM
• Signal Path
: AM
23
L1
L3
FERRITE-ROD
ANTENNA
D1
D2
2
29
24
27
25
FM
MIX
FM RF IN
FM RF OUT
FM OSC
AM RF IN
AM OSC
FM
OSC
AM
MIX
AM
OSC
OSC
OUT
OUT
4
5
FM MIX
AM MIX
12
CF1
10.7MHz
CF2
450kHz
8
10
FM IF IN
AM IF IN
FM
MPX
FM/AM
BUFFER
FM
DET
AM
DET
13
DET
OUT
OUT
16
15
11
FRONT-END
IF AMP,DET,FM MPX
26
7
VCC
QUAD
RF VCC VCC
14
22
LPF1
MODE2
VCC
VCC
VCC
VCC
VCC
CT1
L2
D3
CT2
D4
L4
IC1
MPX
IN
IN
L1, CT1
FM
TRACKING
L3, CT2
AM
TRACKING
L4
AM
FREQUENCY
COVERAGE
Q5
Q3
RF
AMP
Q6
BUFFER
Q4
SWITCH
10.7MHz
CF3
AUDIO
POWER AMP
IC2
40
DO
Q1
RF
AMP
Q2
BPF1
B.P.F.
FM SENS
DX
LOCAL
OFF
ON
L.P.F
Q104,105
S1
IN 2
4
IN 1
2
VOL
RV1
REF
5
MUTE SW
10
OUT 2
LOUT
ROUT
7
OUT 1
9
J1
DC-DC
CONV
T101
Q106, 107
VCC
38
OSC IN
31
BAND2
21
MODE1
32
BAND1
50
ST/MONO
29
AM BAND
49
MUTE
28
BEEP
X OUT
55
LCD101
LIQUID CRYSTAL
DISPLAY
S102 - S112
KEY MATRIX
X IN
56
X101
75kHz
1
4
COM1
COM4
5
17
S1
S13
VOLTAGE
DETECT
2
1
VDET 35
IC102
HOLD
34
HOLD
S101
KR1
24
DIGITAL TUNING
SYSTEM CONTROL
IC101
KR2
25
KR3
26
KS1
21
KS0
20
KR0
23
KS2
22
DRY BATTRY
SIZE "AAA"
(IEC DESIGNATION R03)
1PC 1.5V
Q101, 102
Q103
VDD
D101
IC103
VCC
BATT
RESET
RESET 54
POWER ON 2 46
VCC
Q7, 8
POWER ON 1 52
Click on the first or last page to see other SRF-M37 service manuals if exist.