TAPE OUT L
DIS
C L
DIS
C R
CD R
VI
D
E
O R
AU
X R
TAPE1
I
N
R
TA
P
E
1 IN L
AU
X L
VI
D
E
O L
CD L
PREAPM
AMP CIRCUIT
BASS
RT31
RT32
RT34
TR
EBL
E
BAL
AN
C
E
SW3
1
TONE
DE
FE
A
T
RT33
VOL
U
M
E
PR
E-OU
T L
PR
E-OU
T R
MA
IN IN R
MA
IN IN L
POWER
AM
P
CIRCUIT L
CIRCUIT R
POWER
AM
P
PR
OTEC
TI
ON
CIRCUIT
RL301
MCU(
W
78E
52C)
JK31
R330
POSI
STOR
(80 DE
GRE
E
C)
BLOCK DIAGRAM
H
EAD
PH
O
N
E
TUNE
R R
TUNER L
CONTROL
MP R
MP L
TAPE OUT R
Sp
e
a
ke
r R
S
peak
er
L
J
Q
X
-115F
/24
VOL
-
VOL
+
V
O
LUME
CONTROL
CIRCUIT (
R
E
M
OTE
)
MUT
E
Q
120
MUT
E
Q
220
MUTE
CIRCUIT
FOR RE
CORD OUT
TEM
P
C
O
M
PEN
SATI
O
N
CIRCUIT(
Q
122,Q
222 O
N
TH
E M
A
IN
H
EATSI
N
K
)
IN
PU
T AN
D
STAN
D
B
Y
INDICA
TION LE
DS
INPUT SELECTION IC(TC9164CNG)
+
/-
1
7V
S
UP
P
L
Y
CIRCUIT
+
/-
45V
S
UP
P
L
Y
CIRCUIT
MUT
E
Q
105
MUT
E
Q
205
MA
IN MUT
E
CIRCUIT