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Diagrams; Block Diagram - Amplifier Sction - Sony XM-7547 Service Manual

Stereo power amplifer
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XM-7547
5-1. BLOCK DIAGRAM – AMPLIFIER SECTION –
PRE AMP
IC801-1
CNJ807
(MONO)
A
5
7
B
B-CH
INPUT
PRE AMP
IC807-1
(MONO)
C
5
7
D
D-CH
TEST TONE AMP
CNP805
8
TO
POWER
2
BOARD
CNB805
3
9
4
1
10
6
7
5
09
SECTION 5

DIAGRAMS

H.P.F
H.P.F
LEVEL
IC802-1
IC803-1
FILTER
CNP808
VR801-1
VR805-1
2
2
6
7
5
7
6
CNJ808
S801-1
FILTER
FILTER BOARD
H.P.F
H.P.F
IC808-1
IC809-1
LEVEL
CNP809
FILTER
VR806-1
VR802-1
2
2
6
7
5
7
6
CNJ809
S802-1
FILTER
TEST TONE
S851
IC851-2
TEST TONE AMP
IC851-1
2
1
3
6
7
5
CNP806
CNJ806
B+
2
2
FN801
M
FAN CTL
FAN DRIVER
DC FAN MOTOR
1
1
Q852
Q851
D854
T851
D856
INVERTER
D855
Q855
D857
POWER
POWER
D858
CONTROL
DRIVE
Q853
Q854
D860
INVERTER
Q856
D859
D861
THERMAL
DET
TH851
AMPLIFIER BOARD
LINE SWITCH
LOWBOOST
LINE SWITCH
L.P.F
L.P.F
HPF
CNJ808
IC806-1
IC804-1
IC805-1
FILTER
3
3
FLAT
VR805-3
5
7
7
6
7
6
LPF
CNP808
FILTER
B+
S803-1
LEVEL SHIFT
S801-3
X10-X1
Q101
B-
LINE SWITCH
LOWBOOST
VR803-1
LOWBOOST
LINE SWITCH
CNJ809
L.P.F
L.P.F
HPF
IC812-1
IC810-1
IC811-1
FILTER
3
3
FLAT
VR806-3
5
7
7
6
7
6
LPF
CNP809
FILTER
B+
S804-1
X10-X1
S802-3
LEVEL SHIFT
Q301
FILTER
B-
LOWBOOST
VR804-1
+45V
+15V
-15V
-45V
8
8
DIRECT
Q102
S805-1
ON
OFF
DIFFERENTIAL
POWER AMP
AMP
(VOLTAGE STAGE)
Q104,106
Q108
Q103
POWER AMP
(FINAL STAGE)
BIAS
VR101,Q110
DIFFERENTIAL
POWER AMP
AMP
(VOLTAGE STAGE)
NFB ON
Q105,107
Q109
NFB OFF
RY801(1/2)
Q302
DIRECT
S806-1
ON
OFF
DIFFERENTIAL
POWER AMP
AMP
(VOLTAGE STAGE)
Q304,306
Q308
POWER AMP
(FINAL STAGE)
BIAS
Q303
VR301,Q310
DIFFERENTIAL
POWER AMP
AMP
(VOLTAGE STAGE)
NFB ON
Q305,307
Q309
NFB OFF
RY801(2/2)
OFFSET
SET
Q857-861
SPEAKER OUT
OVERLOAD
Q114,116
CN810
Q111-112
A
A+B
MONO
OVERLOAD
B-CH
Q113,115
B
OVERLOAD
Q314,316
CN811
Q311-312
C
C+D
MONO
D-CH
OVERLOAD
Q313,315
D
SPEAKER OUT
• Signal path
: Audio

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