Read Sony SRF-M37 Service Manual online
10
10
SRF-M37
4-4.
IC Block Diagrams
IC1 TA2154AFN-EL
IC2 LA4535M-TE-L
BIAS
POWER
SWITCH
AMP 1
AMP 2
MUTE
CIRCUIT
MUTE SWITCH
POWER SWITCH
OUT 1
OUT 2
POWER GND
V
CC
REF
IN 2
IN 1
PRE GND
6
7
8
9
10
5
4
3
2
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
20
21
19
18
17
16
22
23
25
26
27
28
24
30
29
15
TV RF OUT
FM RF OUT
AM BYP
ASS
AM RF IN
RFVCC
AM OSC
TV FM OSC
OSC OUT
MODE2
MODE1
IF REQ
IF COUNT
LPF2B
LPF2A
L OUT
R OUT
LPF1
MPX IN
DET OUT
QUAD
AM IF IN
GND
FM IF IN
VCC
AGC
AM MIX
FM MIX
RF GND
FM RF IN
TV RF IN
AM
OSC
AM
MIX
FM/AM/TV
PW SW
SW
1/2
BUFF
LEVEL
DET
AM
DET
1/8 or
1/16
TV
OSC
FM
OSC
IF
BUFF
BUFF
BUFF
FM/TV
MIX
FM
RM
RM
TV
RF
RF
FM
DET
FM MPX
FM
IF
AF
AGC
AM
IF
4-5.
IC Pin Function Description
• IC101
TC9329FA-123 (DIGITAL TUNING, SYSTEM CONTROL)
Pin No.
1 to 4
5 to 17
18
19
20 to 22
23 to 26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42 to 45
46
47, 48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
I/O
O
O
I
I
O
I
—
O
O
O
O
O
I
I
I
I
—
I
—
O
—
—
O
I
O
O
O
O
—
I
O
I
—
—
—
—
—
—
—
—
Pin Name
COM1 to COM4
S1 to S13
TEST
MB SW
KS0 to KS2
KR0 to KR3
VDD
BEEP
AM BAND
LW/MW1
BAND2
BAND1
TEST
HOLD
VDET
IF IN2
GND
OSC IN
VDD
DO
V REG
P3-0 to P3-3
POWER ON 2
INT1, INT2
MUTE
ST/MONO
LW/MW2
POWER ON 1
P2-3
RESET
XOUT
XIN
GND
VDB
C1
C2
VEE
C3
C4
VLCD
Description
LCD common output
LCD segment output
Test mode control signal input (“H” : test mode)
Not used
Key source
Key return
Power supply terminal
Beep signal output
Band selection signal output (“H” : AM)
Not used
Band selection signal output (“L” : FM)
Band selection signal output (“L” : AM)
Not used (connected to the ground)
HOLD switch signal input(“L” : hold on)
1.0V battery voltage detection signal input (“L” : lower than 1.0V)
Not used
Ground terminal
Programmable counter input terminal
Power supply terminal
Phase comparator output
Phase comparator constant voltage supply
Not used
Power supply control signal output (“L” : radio on)
Destination setting terminal
Muting control signal output (“L” : muting on)
Stereo/mono selection signal output
Not used
Power supply control signal output (“H” : radio on)
Not used
Reset signal input (“L” : microcomputer reset)
External crystal resonator terminal (75kHz)
External crystal resonator terminal (75kHz)
Ground terminal
Power voltage step-up terminal
Voltage doubler boosting capacitor terminal
Voltage doubler boosting capacitor terminal
1.5V constant voltage power supply output for LCD drive
Voltage doubler boosting capacitor terminal
Voltage doubler boosting capacitor terminal
3.0V constant voltage power supply output for LCD drive
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