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Amplifier
XM-SD46X - Stereo Power Amplifier
Service manual
Block Diagram - Sony XM-SD46X Service Manual
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Operating instructions
(2 pages)
,
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(2 pages)
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4-1. BLOCK DIAGRAM
PRE AMP
IC801 (1/2)
CNJ100-1
L
3
1
2
CNJ802 (1/2)
-1
L
HIGH
-5
INPUT
LEVEL
L
INPUT
(FRONT)
-6
(FRONT)
R
-2
PRE AMP
R
IC801 (2/2)
CNJ100-2
6
R
7
5
PRE AMP
IC808 (1/2)
CNJ100-3
L
6
(L+R)
7
5
CNJ802 (2/2)
-3
L
-7
HIGH
L
INPUT
LEVEL
INPUT
-8
(REAR)
R
(REAR)
-4
R
PRE AMP
IC808 (2/2)
CNJ100-4
R
3
(L+R)
1
2
F901
CN800
25A
POWER
+12V
2
SWITCH
Q901
F902
25A
OVER
VOLTAGE
DETECT
Q902
GND
3
D829
POWER
ON/OFF
REM
1
Q903
PL802
(PILOT LAMP)
XM-SD46X
LINE AMP
IC802 (1/2)
3
1
2
RV801-2
FILTER
RV803-1
RV801-1
LEVEL
FILTER
LINE AMP
IC802 (2/2)
5
7
6
RV801-3
FILTER
RV803-2
RV801-4
LEVEL
FILTER
LINE AMP
HPF
BPF
IC809 (1/2)
IC811 (1/2)
IC811 (2/2)
5
7
3
1
6
6
RV804-1
FILTER
RV806-1
LEVEL
LINE AMP
HPF
BPF
IC809 (2/2)
IC812 (1/2)
IC812 (2/2)
3
1
3
1
6
2
RV804-3
FILTER
RV806-2
LEVEL
PROTECTION
Q812-814
DC-DC CONVERTER
VCC
12
DC DET
IC902
BUFFER
14
Q810
REF
D828
1
2
15
TEMP.DET
16
THN801,804-807
D854
D850-853
3
(POWER)
PROTECTOR
(FRONT)
S801-1
HPF
FILTER
IC806 (1/2)
HPF
LOW BOOST
IC806 (2/2)
OFF
3
1
2
5
7
6
RV802-1
LOW
HPF
BOOST
IC807 (1/2)
(40Hz)
LOW BOOST
IC807 (2/2)
3
1
2
5
7
6
S801-2
FILTER
HPF
OFF
RV802-2
LOW
BOOST
(40Hz)
(REAR)
LPF
IC813 (1/2)
LOW BOOST
IC813 (2/2)
7
6
7
3
RV804-2
1
FILTER
2
S802-1
FILTER
LPF
OFF
RV805-1
LOW
HPF
BOOST
(40Hz)
LPF
IC814 (1/2)
LOW BOOST
IC814 (2/2)
7
6
7
3
RV804-4
1
FILTER
2
S802-2
FILTER
LPF
OFF
RV805-2
HPF
LOW
BOOST
(40Hz)
DC-DC
CONVERTER
IC901
TRANSFORMER
T801
11
SWITCHING
BUFFER
10
DRIVER
REF.
Q913
Q904,905
REG
DRIVER
Q908,909
8
SWITCHING
BUFFER
9
DRIVER
Q912
Q906,907
11
11
LINE
SWITCH
Q102
DIFFERENTIAL
DRIVE
AMP
AMP
B+
Q103
Q107
RV104
(+14.2V)
BIAS
BOOST
BIAS
GAIN
Q111
Q101
DIFFERENTIAL
DRIVE
AMP
AMP
Q104
Q108
B–
(–14.2V)
LINE
SWITCH
Q202
DIFFERENTIAL
DRIVE
AMP
AMP
B+
Q203
Q207
RV204
(+14.2V)
BIAS
BOOST
BIAS
GAIN
Q211
Q201
DIFFERENTIAL
DRIVE
AMP
AMP
Q204
Q208
B–
(–14.2V)
LINE
SWITCH
Q302
DIFFERENTIAL
DRIVE
AMP
AMP
B+
Q303
Q307
RV304
(+14.2V)
BIAS
BOOST
BIAS
GAIN
Q311
Q301
DIFFERENTIAL
DRIVE
AMP
AMP
B–
Q304
Q308
(–14.2V)
LINE
SWITCH
Q402
DIFFERENTIAL
DRIVE
AMP
AMP
B+
Q403
Q407
RV404
(+14.2V)
BIAS
BIAS
BOOST
Q411
GAIN
Q401
DIFFERENTIAL
DRIVE
AMP
AMP
Q404
Q408
B–
(–14.2V)
SWITCH
B+
CONTROL
(+23.5V)
Q801,802
B+
D903,904
(+23.5V)
D903
RECT
+14.2V
B+
REG
(+14.2V)
Q910
D904
D906
B+
(+37V)
D905
B+
D905,906
(+30.5V)
RECT
D907
D907,908
RECT
B –
(–30.5V)
D911,912
D908
RECT
D912
B –
(–37V)
D917
D911
–14.2V
B –
REG
(–14.2V)
D918
D917,918
Q911
RECT
XM-SD46X
CN810
OVER LOAD
FRONT
DET
SPEAKER
Q112
OUT
POWER
AMP
Q109
L
POWER
AMP
Q110
OVER LOAD
DET
Q212
POWER
AMP
Q209
R
POWER
AMP
Q210
CN811
OVER LOAD
REAR
DET
SPEAKER
Q312
OUT
POWER
AMP
Q309
L
POWER
(L+R)
AMP
Q310
OVER LOAD
DET
Q412
POWER
AMP
Q409
R
POWER
AMP
Q410
OFFSET
DET
Q803-805
PROTECT
DRIVER
Q850
• Signal path
: AUDIO
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