Aiwa HV-MC90 Service Manual page 20

BLOCK DIAGRAM -3/4 (AUDIO SECTION)
JK3M1
AUDIO
IN
AUDIO
OUT
MD3M1
(MODULATOR)
A.IN
1
:AUDIO(REC) SIGNAL
:AUDIO(PB) SIGNAL
IC301
HA118717F
VIDEO/AUDIO
PROCESSOR
9
VCA
8
7
DET
5V
TO
SYSTEM
REC "H"
CONTROL
SECTION
REC
4
AMP
AMP
11
PB EQ
2
AMP
Q302,Q303 FL301,Q301
BIAS
SW
OSC
-20-
Q304-Q306 Q307
SW SW 5V
REC "H"
TO
SYSTEM
CONTROL
SECTION
AUDIO
REC/PB
HEAD
AUDIO
ERASE
HEAD
FULL
ERASE
HEAD