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5-1. BLOCK DIAGRAM – AMPLIFIER SECTION –
PRE AMP
IC801(1/2)
LEVEL
IC802(1/2)
CNJ805
VR801(1/2)
INPUT
(M0N0)
5
7
6
L
OUTPUT
(THROUGH)
L-CH
TEST TONE
S805
INPUT
R-CH
R
TEST TONE AMP
IC804(1/2)
OUTPUT
(THROUGH)
R-CH
2
1
3
CNP804
6
TO
POWER
BOARD
POWER
POWER
CNB804
CONTROL
3
DRIVE
Q941
Q942
THERMAL
4
DET
TH803
1
5
9
7
8
09
SECTION 5
DIAGRAMS
H.P.F
L.P.F
IC101(2/2)
IC101(1/2)
H.P.F
L.P.F
IC201(2/2)
IC201(1/2)
IC803
FILTER
FILTER
CNP806
VR804
VR804
1
1
7
5
7
6
7
6
CNJ806
S804
ON
FILTER BOARD
TEST TONE AMP
IC804(2/2)
6
7
5
D942
T902
B+
D944
INVERTER
Q943
D946
D948
D947
D949
INVERTER
Q944
D945
B-
D943
AMPLIFIER BOARD
LINE SWITCH
Q102
BOOST/LOWCUT
LOWBOOST
LINE SWITCH
HPF
CNJ806 CNP806
FREQ
IC102(1/2)
Q101
8
VR802
8
FLAT
5
7
LPF
7
6
FILTER
SW803
5
VR802
7
NFB
(2/4)
6
VR802
(1/4)
LOWBOOST
OFF
IC102(2/2)
12
12
11
11
B+
9
9
DIRECT
SW802(1/2)
ON
OFF
DIFFERENTIAL
POWER AMP
AMP
(VOLTAGE STAGE)
Q104,106
Q108
POWER AMP
(FINAL STAGE)
BIAS
Q110-111
VR101
DIFFERENTIAL
POWER AMP
AMP
(VOLTAGE STAGE)
NFB ON
OVERLOAD
Q103,105
Q107
Q112,113
NFB OFF
RY801(1/2)
OFFSET
DET
Q812-814
XM-7527
SPEAKER OUT
CN807
L
OVERLOAD
Q114-115
L+R
MONO
R-CH
R-CH
R
B+
+28V
TO
POWER
BOARD
-28V
B-
• Signal path
: Audio
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