Hitachi 9305 Manuel Technique page 88

6-3 Audio Block Diagram
N-A-PB
TO Hi-Fi
N-A-REC
AUDIO BLOCK
(DECK ASSEMBLY)
ACE HEAD ASSEMBLY
CL287
AUDIO A-PB/REC 4
HEAD
A-COM 3
AUDIO AE-H 1
ERASE
AE-H/FE-H 2
HEAD
FE HEAD
FULL
ERASE
HEAD
+5V
Q404
CL504
4 A-PB/REC
Q403
3 A-COM
BIAS
1 AE-H
OSC
2 AE-H/FE-H
Q406
SWITCHING
D-REC-OFF
Q405
CL501
2 FE-H
1 FE-H-GND Q401
(PB=ON)
MAIN CBA
IC301
(AUDIO SIGNAL PROCESS)
PB-ON
5 EQ
8 9
AMP
6
SP/LP-ON
7
1 AUTO
3 100
BIAS
2
+5V
PB-AUDIO SIGNAL REC-AUDIO SIGNAL
13 15 17
IN1
TUNER IN2
ALC
DET
INV
R LINE
ALC MUTE
AMP
ATT
P
REC-ON
REC
AMP
SERIAL
DECODER
AUDIO HD-SW
CONTROL
16 68 69 71
Mode : SP/REC
12
11
A-MUTE-H
IIC-BUS SDA TO SERVO/SYSTEM
CONTROL BLOCK
IIC-BUS SCL
31