HCD-C770/C990
59
59
7-28. SCHEMATIC DIAGRAM – AUDIO Section –
•
See page 71 for Waveform.
•
See page 76 for IC Block Diagrams.
R238
R244
R291
R242
C242
R253
R246
C240
R224
R219
R221
R220
C226
C228
C223
C225
R223
R218
Q207
R245
R239
R228
R227
Q206
Q205
R233
R250
R236
C234
R229
C233
R230
R237
R243
R251
R231
J205
R232
R249
R241
C238
R235
C236
J206
CN201
R208
R209
R211
R210
CN205
CNP205
CN202
CN208
C213
C214
R295
R294
R252
R247
C245
Q208
C235
C237
C241
C239
C243
R203
C207
C204
IC201
C205
C210
D201
C209
C221
R204
R202
R205
C203
R206
R207
R201
C201
Q201
Q220
Q221
C224
C220
C222
C227
C232
C230
S201
R212
R254
C206
C208
X201
IC202
R292
C215
R290
C216
R293
C609
C608
R225
R217
R222
R226
R214
L205
D202
D203
R213
C211
R215
R216
Q222
Q223
L206
CN204
10k
10k
470k
10k
220p
47k
47k
220p
100
100
100k
100k
0.1
0.1
0.1
0.1
10k
10k
DTC343TK-T
-146
1k
1k
1k
1k
DTC124EK
DTC124EK
10k
10k
10k
1000p
100k
1000p
100k
6.8k
6.8k
75
75
6P
6.8k
6.8k
47k
220p
47k
220p
6P
11P
220
220
220
220
2P
2P
29P
11P
0.01
0.01
330
330
10k
10k
10
50V
DTC343TK-T
-146
22
6.3V
22
6.3V
22
35V
22
35V
10 6.3V
68k
4.7
50V
560p
BU1924F-E2
0.01
22
35V
UDZ-TE17-4.3B
47
16V
22
35V
47k
1k
100k
0.1
470k
270
4.7k
330p
2C2412
2SC2412
2SC2412
22
35V
22
35V
22
35V
22
35V
10
50V
10 50V
220
75
51
56
4.332MHz
MC14052 BDR2
1k
1
470k
1
1k
6800p
6800p
33k
33k
33k
33k
6.8k
MA111-TX
MA111-TX
47k
22
35V
6.8k
4.7k
2SA1037AK
DTC124EKA
2P
CE
TD
CL
DO
DI
DI
CE
DO
TD
CL
FM-DET
TUNED
R-CH
L-CH
DO
CK
CE
DI
Y
0
Y2
Y
Y
3
Y
1
IN
H
VE
E
V
S
S
V
D
D
X2
X
1
X
X
0
X
3
A
B
A.GND
RDATA
RCLK
TUNDO
TUNDIN
TUNSTE
TUNCE
TUNCLK
D.GND
D.IN
D.DND
D.OUT
D.GND
AUMUTE
DGND
L
A.GND
R
A.GND
R.IN
A.GND
L.IN
10V
10V
AV0
AV1
AV2
NC
I/P-SEL
10V
CB
CR
Y
V2-IN
V-OUT
V1-IN
D-IN
AV2
AVO
AV1
GND
A.GND
AUDIO OUT R
AUDIO IN R
AUDIO OUT L
AUDIO IN L
VIDEO OUT
VIDEO IN
AUDIO IN R
AUDIO IN L
COMPONENT
VIDEO OUT
Y
COMPONENT
VIDEO OUT
PB/CB
VIDEO IN
COMPONENT
VIDEO OUT
PR/CR
VIDEO 1
BUFFER
RDS DECODER
AMP
AMP
INVERTER
INVERTER
AUDIO INPUT
SELECTOR
Q207,208
MUTING
SELECTABLE
INTERLACE
SCAN SELECT
FM/AM TUNER
PACK
THE ASSEMBLED
BLOCK
SUPPLIED WITH
FM
COAXIAL
AM
(AEP)
VIDEO 2
TU-ON
Q222,223
B+ SWITCH
10
µ
H
10
µ
H
75
Ω
AMP BOARD
(1/2)
PIN301
R
(Page 52)
(Page 61)
(Page 56)