1-9-3
Audio Block Diagram
HM240BLA
REC
AMP
100
3
AU
T
O
BIAS
2
1
+5V
J982
TU701(TUNER UNIT)
J972
+5V
Q401
Q406
BIAS
OSC
Q402
Q405
(PB=ON)
Q403 (SWITCHING)
5
EQ
AMP
9
8
7
LINE
AMP
REC-ON
A
U
DIO HD-SW
CONTR
O
L
MUTE
11
6
PB-ON
SP/LP-ON
P
TUNER
IN2
IN1
R
ALC
DET
SW
CTL
ALC
IC301
(A
UDIO SIGNAL PR
OCESS)
IC151
(SWITCHING)
PB/EE
PB/EE
PB/EE
PB/EE
TUNER
TU-A
UDIO
AU
D
IO
IN2
IN1
IN1
15
13
17
3
A
UDIO-PB/REC
CN504
4
A-COM
6
AE-H
5
AE-H/FE-H
AU
D
IO
HEAD
AU
D
IO
ERASE
HEAD
A
C
E HEAD ASSEMBL
Y
FE HEAD
2
FE-H
1
FE-H-GND
CN501
MAIN CB
A
PB-AUDIO SIGNAL
REC-AUDIO SIGNAL
Mode : SP/REC
71
A-MUTE-H
A
U
DIO-SW
-1
A
U
DIO-SW
-2
IIC-B
US SCL
IIC-B
US SD
A
T
O
SER
V
O/SYSTEM
CONTR
OL BLOCK
T
O
SER
V
O/SYSTEM
CONTR
OL BLOCK
FULL
ERASE
HEAD
68
69
SERIAL
DECODER
(DECK ASSEMBLY)
12
16
INV
AT
T
A
U
DIO-IN1
A
U
DIO-OUT1
7
5
JACK CBA
JK101
CN101
A
U
DIO-IN2
A
U
DIO-OUT2
8
6
7
5
8
6
JK102
CN102
CN151
CN152
2
21
1
5
2
4
12
14
15
11
10
9
3
13
BUFFER
Q151
BUFFER
Q152
AUDIO-IN1
AUDIO-IN1
2
6
1
3
AUDIO-OUT1
AUDIO-OUT1
AUDIO-IN2
AUDIO-IN2
AUDIO-OUT2
AUDIO-OUT2
2
6
1
3
