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