FUNAI 27C-250, Service Manual

Page: 16 / 71

Audio Block Diagram
REC
AMP
100 3
AUTO
BIAS
2
1
+5V
TU701(TUNER UNIT)
+5V
Q401
Q406
(SWITCHING)
BIAS
OSC
Q402
Q405
(PB=ON)
Q403
5 EQ
AMP
9 8
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
4 A-PB/REC
CL504
3 A-COM
1 AE-H
2 AE-H/FE-H
A-PB/REC 4
A-COM 3
AE-H 1
AE-H/FE-H 2
CL287
AUDIO
HEAD
AUDIO
ERASE
HEAD
ACE HEAD ASSEMBLY
FE HEAD
2 FE-H
1 FE-H-GND
CL501
1-7-5 1-7-6 HE244BLA
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
ATT
A-IN1
A-OUT1 8
6
JACK CBA
JK101
CL101
A-IN2
A-OUT2 8
6
8
6
8
6
JK102
CL102
CL151
CL152
2
21
1
5
2
4
12
14
15
11
10
9
3
13
BUFFER
Q151
BUFFER
Q152
A-IN1
A-IN1 2
6
1
3
A-OUT1
A-OUT1
A-IN2
A-IN2 2
6
1
3
A-OUT2
A-OUT2