Read Sony CDX-S2020 Service Manual online
14
14
CDX-S2020
CDX-S2020
3-2. BLOCK DIAGRAM — TUNER SECTION —
(Page 13)
J1
(ANTENNA)
1 ANT
CDL
CDR
R-CH
3
R-CH
AUDIO 8.3V
TUNER UNIT
TU1
6
S-METER
14
TU-SDA
SYSTEM CONTROL
IC501 (2/3)
24
ACCIN 21
TELATT 23
AMPSTB 70
BEEP 85
CD
SECTION
A
3
11
CN601
1
9
FL+
FL-
2
10
RL+
RL-
4
12
13
7
FR+
FR-
15
RR+
RR-
TEST
ACC
ATT
16 +B (BATT)
8 GND
R-CH
F901
10A
TU_ATTIN
NC
BATT
17
19
18
BATT
EEP_CKO
67
VSM
3.3V
13
TU-SCL
ATT
BATT
59
TESTIN
DIAG
22
93
5
QUALITY
QUALITY
92
NS-MASK
66
VOLATT
60
DAVN
82
SOUND CONTROL
ELECTRONIC VOLUME
IC401
NC
BUS-LCH
5
CD-LCH
9
TV-LCH
7
SDA
SCL
MUTE
CONT.
EVR
29
I2C_SIO
I2C_CKO
79
81
17
E2P-SDA
16
E2P-SCL
8
MUTE-CONDITION
7
TU-MUTE
11
TU-VDD (TU5V)
10
VCC (8.3V)
68 EEP_SIO
28
TU_ATT
64
R-CH
9
RDS
16 MPX
9 XTI
10
1
7
XTO
12
SDA
25
5 ANP-R
27
35
37
34
33
31
30
6 ANT-R
BEEP
STB
4
SCL
2
SDA
CONT.
9
7
6
20
POWER AMP
IC750 (1/2)
MULTIPLE VOLTAGE
REGULATOR
IC750 (2/2)
VP2
VP1
VP1
• Signal path
: FM
: CD
• R-ch is omitted due to same as L-ch.
12
SYSRST
3.3V
37
BUSON 36
UNISI 5
UNICKO 6
UNISO 4
BUIN 31
4
L-CH
OUT
-FL
23
OUT
-RL
22
+5V REG
Q1
BACK-UP CHECK/
LOW VOLTAGE
CHECK
Q581,582
OVER VOLTAGE
DET.
Q580,D580,581
LINE MUTE
CONTROL
Q478,479
TEL
ATT
ATT
Q651
I2C
BUS
ACC
CHECK
Q631
MUTE
Q441
NS MASK
SWITCH
Q22
MUTE
Q461
11
MUTE
TONE
INPUT SELECTOR
EFFECT
15
INTN
11
SCL
5
3
DIAG
ANT-REM
B.UP+B
PANEL+B
MECH 6V
SERVO 3.3V
AUDIO 8.3V
3.3V
PANEL+B
MECH 6V
SERVO 3.3V
AUDIO 8.3V
SERVO 3.3V
AUDIO 8.3V
VP
D760
MUTE
16
22
I2C
BUS
31
30
TU 5V REG
Q51,52
RDS DEMODULATOR
IC51
X51
8.664MHz
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