Sony SRF-M37 Service Manual page 10

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