Audio Section - Sony HCD-EA20 Service Manual

Q Q
– AUDIO SECTION –
3 7 6 3 1 5 1 5 0
VIDEO
F
SECTION
VIDEO
H
SECTION
• R-ch is omitted due
to same as L-ch.
• SIGNAL PATH
: AUDIO
: AUX IN
: TUNER
T E
L 1 3 9 4 2 2 9 6 5 1 3
J102 (2/2)
L
VIDEO
AUDIO IN
R-CH
R
J171
L
AUDIO IN
R R-CH
FM/AM TUNER PACK
COAXIAL
FM ANT
L-CH
FM
75Ω
GND
R-CH R-CH
AM ANT
AM
TUDI
GND
DI
TUDO
DO
TUCLK
CK
TCE
CE
TUNED
TUNED
Q291
FM-DET
DET AMP
w w w
AV SEL0 – AV SEL2
VIDEO
J
SECTION
.
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IC302
D/A CONVERTER
DATA0 FL
31 DATA4 VOUT1 14
DATA1
45 DATA1
DATA2
46 DATA2
FR
DATA3
47 DATA3 13
VOUT2
LRCK-ZIVA
41 LRCK
BCK-ZIVA
40 BCK
XCK
38 SCKI
MDI
34 MDI
MC
35 MC
C
ML
VOUT5 10
36 ML
SL
12
VOUT3
SR
11
VOUT4
SW
VOUT6 9
DM-L
16
VOUT7
DM-R
VOUT8 20
Q121
ATT
IC121
AUDIO INPUT
SELECTOR
IC352
A/D CONVERTER
2 Y2
IC101
4 Y3 Y 3 1 VINL DOUT 15
AMP
Q103
5 Y1
AMP
BCK 14
A B
LRCK 13
10 9 R-CH 5 VINR
SYSCK 16
Q123 Q122
RDSD
RDATA 2
4 MUX RDSC
RCLK 16
XI XO
IC291
13 14
RDS DECODER
X291
4.332MHz
x a o u 1 6 3
y
i
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8
IC522
ELECTRONIC
IC521
VOLUME
LPF
5 7
FL
1 VIN1
3 1 FR
8
VIN2
4 5
DATA3
CLK
IC552
ELECTRONIC
IC551 VOLUME
LPF
C
5 7
1 VIN1
SL
3 1
8 VIN2
4 5
DATA2
CLK
IC502
ELECTRONIC
IC501 VOLUME
LPF
SR
5 7
1 VIN1
SW
3 1
8
VIN2
4 5
DATA1
CLK
Q Q
3 7 6 3 1
IC111
LOW-PASS
FILTER
ADC_DATA
BCK
LRCK
XCK
31 39 40 41 42
TUDI
82 PLL_DO
TUDO
84 PLL_DI
TUCLK
81 PLL_CLK
TCE
83 PLL_CE
TUNED
80 TUNED
RDSD
61 RDS_DATA
RDSC
60 RDS_CLK
SYSTEM CONTROLLER
AV SEL0
76 AV SEL0 c o
AV SEL1
77 AV SEL1
AV SEL2
78 AV SEL2
AV SEL3 .
79 AV SEL3
31 31
2 4
9 9 8
VO1 2
7
VO2
Q521, 522
MUTING
2
VO1
VO2 7
Q551, 552
MUTING
VO1 2
7
VO2
Q511, 512
MUTING
5 1 5 0 8 9 2 4 9
Q112, 212
MUTING
ADC_DATA, BCK, LRCK, XCK
Q507 Q972
MUTING MUTING
CONTROL CONTROL
69 34
m
IC501 (1/3)
HCD-EA20
2
9 9
FL
FR
C
AMP
K
SECTION
SL
SR
SW
8 2 9 9
L J101 (2/2)
VIDEO
AUDIO OUT
R
VIDEO
E
SECTION