Sony CFD-S22L Service Manual page 32

Q Q
3 7 6 3 1 5 1 5 0
• IC Block Diagrams
IC1 TA2149N
GND1
1 FM RF
FM RF-IN 2
AM
MIX
AM LOW CUT 3
FM FM
MIX OUT 4
MIX OSC
AM
OSC
BUFF
BUFF
1/1 OR
VCC2 5
LEVEL 1/16
DET
AM IF
AF IF-IN 6
ST
IF BUFF
FM IF
1/8
FM IF-IN 7
SW
GND2 8
AM
DET
IF REQ
AF BUFF
AGC
AGC
9
FM AF
QUAD 10 DET
ST/MO
R-OUT 11
FM/AM
MUTE
VCO
L-OUT 12
DIVIDE
DECODE
T E
L 1 3 9 4 2 2 9 6 5 1 3
IC2 LC72137M-TLM
CE 1
DI
CCB
CL 3 I/F
DO
4
REFERENCE
DIVIDER
MUTE 5
PHASE
12BITS
DETECTOR
PROGRAMMABLE
MW/LW 6
CHARGE
DIVIDER
PUMP
BAND 7
UNLOCK
ST-IND 8
DETECTOR
POWER ON
BAND 9
RESET
SWALLOW
COUNTER
1/2
1/16,1/17
4BITS
UNIVERSAL
COUNTER
w w w
IF IN 10
IC701 CXA2550M
24
FM RF-OUT
1
AGCVTH
23
VCC1
1k
22 AM RF-IN
LD 2
APC PD
APC LD
56k
AMP
AMP
VCC
PD 3
21 FM OSC
10k
20 AM OSC VEE
10k 55k
10k 56k
VEE
19
OSC-OUT
VREF 1.25V
10k
18 ST-IND
VC
13.4k
50µA
670mV
17 IF-OUT
VC
16 2k
DET-OUT
10k
15 MPX- IN
PD1
4
VC 8k 6p
VC
14 LPF2/MO-ST
2k
VC
10k
13 LPF1/BAND
2k
PD2
5
VC
8k 6p 2k
24p
32k
32k 87k
VEE
6 VEE
24p
25k
VC
154k
VC
260k
13k
95k
F
7
VC
12p 30k
12p 30k
VC
E
8
13k 96k
260k
TRACKING
VCC
ERROR
VC
20 XOUT VC
AMP
26k
EI 9 30k
XIN
19 49
VC 10
30k
VC
15k VEE
18 LP-OUT
17 LP-IN
PD
16
VSS
15
14 VDD
13 MO/ST
FM IN
12
11 AM IN
x a o
. i
– 47 –
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IC301 TA2068N
AGC 1
2
L.PO
VCC 20 VCC
L.NF 3
LD ON
19
REC
AMP1
L.RO 4
L.IN 5
REF 6
REF
AMP
7
GND
18 AGCCONT
2.1
VCC
R.IN 8
R.RO 9
RFTC
17
16 RF I
R.NF 10
15k
NAB
VC
AMP2
11
R.PO
6k
54k
VEE
MIC.NF 12
RF O
15
RFM
14
174k
FE
13
FOCUS
ERROR
Q Q
AMP 3 7 6
IC302 M62429P
12 FE BIAS
VIN2
8
11 TE
VR 2
VOL AMP 2
VOL AMP 1
VR 1
1
VIN1
IC504 BR2401A-W
1
A0
A1
2
u 1 6 3
A2 3
y
GND 4
OCCURENCE CIRCUIT
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2 4
8 9 9
LINE
L.LIN
24
NAB
23 MIC I/EX
AMP1
BUF AMP TAPE
A1 RADIO
22
L.RAD
21 REC
26dB MONITOR
BUF AMP
MUTE
AMP
B1
20 L.LO
ON 7dB
LOGIC 19 VCC
ON 7dB
BUF AMP 18 R.LO
B2
MONITOR
REC MUTE
AMP
AMP2
17 LINE
26dB
RADIO
16 R.RAD
TAPE
15 TAPE
14
R.LIN
BUF AMP LINE
MIC
A2
AMP1
13 MIC
3 1 5 1 5 0 8 9
VOUT2 VCC CLOCK
7 6 5
VREF
LOGIC
CONTROL
REF AMP
2 3 4
VOUT1 GND DATA
1K BIT EEPROM ARRAY
8
VCC
8BIT
7BIT
SLAVE • WORD
ADDRESS DATA
ADDRESS
7BIT 7 WP
DECODER REGISTER
REGISTER
m
START STOP
6 SCL
c o
CONTROL CIRCUIT
ACK
.
HIGH VOLTAGE POWER SUPPLY
SDA
5
VOLTAGE DETECTION
– 48 –
2
8 9 9
2 4 9 8 2 9 9