FUNAI 31A-250 - Page 20

1-9-3
Audio Block Diagram
HM240BLA
REC AMP
100
3
AUTO BIAS
2 1
+5V
J982
TU701(TUNER UNIT)
J972
+5V
Q401
Q406
BIAS OSC
Q402
Q405 (PB=ON)
Q403 (SWITCHING)
5
EQ AMP
98
7
LINE AMP
REC-ON
AUDIO HD-SW CONTROL
MUTE
11
6
PB-ON
SP/LP-ON
P
TUNER IN2 IN1
R
ALC
DET
SW
CTL
ALC
IC301 (AUDIO SIGNAL PROCESS)
IC151 (SWITCHING)
PB/EE PB/EE PB/EE PB/EE TUNER
TU-AUDIO
AUDIO
IN2 IN1 IN1
15 13 17
3
AUDIO-PB/REC
CN504
4 A-COM 6 AE-H 5 AE-H/FE-H
AUDIO HEAD AUDIO ERASE HEAD
ACE HEAD ASSEMBLY
FE HEAD
2 FE-H 1 FE-H-GND
CN501
MAIN CBA
PB-AUDIO SIGNAL REC-AUDIO SIGNAL
Mode : SP/REC
71
A-MUTE-H
AUDIO-SW-1 AUDIO-SW-2
IIC-BUS SCL
IIC-BUS SDA
TO SERVO/SYSTEM CONTROL BLOCK
TO SERVO/SYSTEM CONTROL BLOCK
FULL ERASE HEAD
68 69
SERIAL
DECODER
(DECK ASSEMBLY)
12
16
INV
AT T
AUDIO-IN1
AUDIO-OUT1
7
5
JACK CBA
JK101
CN101
AUDIO-IN2
AUDIO-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