Schematic Diagram - Audio Section - Sony HCD-C770 Service Manual

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3 7 6 3 1 5 1 5 0
6-28. SCHEMATIC DIAGRAM – AUDIO Section – •
J205
6P
T E
AUDIO OUT R L 1 3 9 4 2 2 9 6 5 1 3
AUDIO IN R
AUDIO OUT L
R237
VIDEO 1
6.8k
AUDIO IN L
R232
VIDEO OUT
6.8k
VIDEO IN
R251 R231
75 75
R243
6.8k
AUDIO IN R
COMPONENT
VIDEO OUT
Y
R249
6.8k
VIDEO 2 AUDIO IN L
COMPONENT
VIDEO OUT
PB/CB
VIDEO IN
COMPONENT
VIDEO OUT
PR/CR
J206
6P
R254
75
w w w
.
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•
See page 69 for Waveform. See page 74 for IC Block Diagrams.
(AEP)
C201
330p
Q201
2C2412
BUFFER
R204 R202 R205
47k 1k 100k
RDS DECODER
R203
68k
C204
560p
C207
4.7
50V
IC201
BU1924F-E2
C221
C223
0.1
C225
R230 C233 R229 C234
100k 1000p 100k 1000p
R233
10k
C236 R235 R241 C238
C237
220p 47k 47k 220p
22 R238
6.3V 10k
C235
22
6.3V
R250
10k
C239
22 R244
35V 10k
C228
C226
0.1
C241 R242 R247
22 10k 10k
35V
R253 C242 R236 R252
47k 220p 10k 10k
R246 C240
47k 220p
Q208
DTC343TK-T
-146
C243 10 6.3V
C245
10
50V
x a o u 1 6 3
y
i
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8
C214
0.01
C213
0.01
R201
4.7k
R206 R292 C215 C216 R293
470k 1k 1 1 1k
R207
270 R290
R291
C203 470k
470k
0.1
C209 Q220 Q221
47 2SC2412 2SC2412
16V
AMP AMP
C210 C211
R294 R295
22 22
C205 330 330
35V 35V
0.01
C206 51
C208 56
X201
4.332MHz
22
35V
R223 R218 R217 R225 R214 R215
0.1 10k 10k 33k 33k 6.8k 6.8k
C220
Q Q
22
3 7 6 35V 3 1
R219 C224
100 22
R224 R226 35V R220
100 33k 100k
R222 R221
33k 100k
AUDIO INPUT
SELECTOR
Q206
DTC124EK
IC202 INVERTER C222
MC14052 BDR2 22
35V
Q205
DTC124EK
INVERTER
0.1
R227 1k C230 10 50V
R228 C232
1k 10
50V
Q207,208
MUTING Q207
DTC343TK-T
-146
R239
1k
R245
1k
.
57 57
2 4
9 9 8
CN201
11P
L-CH
TD R212 220
TUNED
R-CH
10V
A.GND
FM-DET
A.GND
CL R208 220
CK
DO R209 220
L205
DO
10µH
CE R211 220
CE
Q222,223 DI R210 220
DI
B+ SWITCH Q222
2SA1037AK
R216
4.7k
Q223
DTC124EKA
R213
47k
DO
DI
TD
CE
CL
L206
10µH
5 1 5 0 8 9 2 4 9
C227
22
35V
m
c o
HCD-C770/C990
2
9 9
COAXIAL
FM/AM TUNER FM
PACK
75Ω
SUPPLIED WITH
THE ASSEMBLED
AM
BLOCK
CNP205
CN205
2P
2P S201
SCAN SELECT
SELECTABLE
INTERLACE
CN202
29P
RDATA
RCLK
TUNDO
TUNDIN
TUNSTE
TUNCE
TUNCLK
D.GND
D.IN
D.DND
D.OUT
D.GND
I/P-SEL
NC
AV0
AV1 8 2 9 9
(Page 50)
AV2
AUMUTE
TU-ON
DGND
L
A.GND
R
A.GND
R.IN
A.GND
L.IN
10V
10V
CN204
2P
R
AMP BOARD
(1/2)
PIN301
(Page 54)
CN208
11P
Y
CB
V-OUT
CR
V1-IN
AV2
V2-IN
AV1
(Page 59)
AVO
GND
D-IN