Sony CFD-S20CP Service Manual page 39

IC802 CAT24WC02JI-1.8-TE13 (MAIN Board)
1
A0
7BIT
ADDRESS
DECODER
A1
2
A2
3
CONTROL CIRCUIT
HIGH VOLTAGE
GND
4
OCCURENCE CIRCUIT
IC303 BD3870FS-E2 (MAIN Board)
24 23
TREBLE1
f =8kHz
0
VCC/2 VCC/2
1 2 3
IC301 TA2068N (TC Board)
AGC 1
L.PO 2
NAB
AMP1
BUF AMP
3
L.NF
A1
REC
AMP1
L.RO
4
26dB
L.IN 5
REF 6
REF
AMP
7
GND
2.1
REC
R.IN 8
AMP2
R.RO 9
26dB
R.NF
10
NAB
AMP2
R.PO 11
BUF AMP
MIC
A2
AMP1
12
MIC.NF
1K BIT EEPROM ARRAY
8BIT
SLAVE • WORD
DATA
ADDRESS
7BIT
REGISTER
REGISTER
START STOP
ACK
POWER SUPPLY
VOLTAGE DETECTION
22 21 20 19
TREBLE2 BASS2 BASS1
f =8kHz f =80Hz f =80Hz
0 0 0
4 5 6 7
LINE
TAPE
RADIO
MONITOR
BUF AMP
MUTE
AMP
B1
7dB
ON
LOGIC
ON
7dB
BUF AMP
B2
MONITOR
MUTE
AMP
RADIO
TAPE
LINE
8 VCC
7 WP
6
SCL
SDA
5
18 17 16 15 14
LOGIC
VCC/2
VCC/2
8 9 10
24 L.RAD
MIC I/EX
23
22 L.LINE
21 REC
20 L.LO
19 VCC
18
R.LO
17
LINE
R.LINE
16
15 TAPE
14
R.RAD
13
MIC
CFD-S20CP
13
VCC/2
11 12
39