1-9-9
Hi-Fi Audio Block Diagram
HG490BLH
ENV
DET
LOGIC
R
L
HOLD PULSE
LIM
OUTPUT
SELECT
REC-AUDIO SIGNAL
PB-AUDIO SIGNAL
Mode : SP/REC
IIC-BUS SDA
IIC-BUS SCL
A-MODE
LINE-MUTE
MUTE
MUTE-ON
MUTE-ON
Hi-Fi-H-SW
" " = SMD
NO
TE FOR
WIRE CONNECT
ORS:
1.
PREFIX SYMBOL "CN" MEANS CONNECT
OR.
(CAN DISCONNECT AND RECONNECT
.)
2.
PREFIX SYMBOL "CL" MEANS
WIRE-SOLDER
HOLES OF
THE PCB
.
(WIRE IS SOLDERED DIRECTL
Y
.)
TEST POINT INFORMA
TION
:INDICA
TES A
TEST POINT
WITH A JUMPER
WIRE A
CR
OSS A HOLE IN
THE PCB
.
:USED
T
O INDICA
TE A
TEST POINT
WITH A COMPONENT LEAD ON FOIL SIDE.
:USED
T
O INDICA
TE A
TEST POINT
WITH NO
TEST PIN.
:USED
T
O INDICA
TE A
TEST POINT
WITH A
TEST PIN.
IF SIGNAL
PROCESS
N-A-REC
TO AUDIO BLOCK
N-A-PB
AFV CBA
TU-A
UDIO(R)
4
TU-A
UDIO(L)
5
4
5
CN701
C
N
1
SIF
2
2
CN701
CN1
TU701
AUDIO IN
SIF OUT
2
22
JACK CBA
MAIN CBA
JK101
A-IN1(R)
A-IN1(L)
2
6
2
6
1
3
1
3
JK102
CL151
CL152
CL101
CL102
A-IN2(R)
A-IN2(L)
A-OUT1(R)
A-OUT1(L)
A-OUT2(R)
A-OUT2(L)
A-IN2(R)
(Hi-Fi A
UDIO SIGNAL PR
OCESS)
9
A-IN2(L)
8
9
8
A-OUT2(R)
6
A-OUT2(L)
11
6
11
A-IN1(R)
9
A-IN1(L)
7
9
7
A-OUT1(R)
5
A-OUT1(L)
11
5
11
IC451
Hi-Fi
AUDIO
(R) HEAD
Hi-Fi
AUDIO
(L) HEAD
CYLINDER
ASSEMBLY
Hi-Fi-
A(R)
7
Hi-Fi
-COM
8
Hi-Fi-
A(L)
9
CL253
48
47
14
15
R-CH
INSEL
L-CH
INSEL
ALC
SW
SW
ALC
62
61
71
70
24
26
27
34
33
L-CH
BPF
COMP
SW
NOISE
COMP
SW
NOISE
R-CH
BPF
VCO
LPF
LIM
DEV
VCO
LPF
LIM
DEV
MIX
V/I
NOISE
DET
DO
DET
P
P
R
R
VCO
MUTE
73
74
72
76
77
75
37
38
21
53
39
L-CH
PNR
ALC
R-CH
PNR
ALC
67
65
52
56
54
50
60
2
6
10
8
4
78
80
+
Q451
FR
OM/T
O
SER
V
O/SYSTEM
CONTR
OL BLOCK
(DECK ASSEMBLY)
JK751
A-OUT
(L)
A-OUT
(R)
SUB JACK CBA
CL509
A-OUT1(L)
2
A-OUT1(R)
1
JK758
A-IN(R)
JK757
A-IN(L)
FR
ONT
(TUNER UNIT)
