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Diagrams; Block Diagram - Sony XM-SD22X Service Manual

Stereo power amplifier
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4-1. BLOCK DIAGRAM

CNJ801-1,-3
L
-1
INPUT
(BTL)
OUTPUT
L
(THROUGH)
-3
CNJ803
L
HIGH LEVEL
INPUT
R
CNJ801-2,-4
-4
OUTPUT
(THROUGH)
R
-2
INPUT
CN801
REM
F902
+12V
F901
GND
D854
PROTECTOR
XM-SD22X
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SECTION 4

DIAGRAMS

PRE AMP
PRE AMP
IC101 (1/2)
IC102 (1/2)
6
7
3
5
1
2
L.P.F
IC301
3
RV101-1
1
LEVEL
2
PRE AMP
PRE AMP
IC101 (2/2)
IC202 (1/2)
3
1
3
2
1
2
RV101-2
LEVEL
POWER
ON/OFF
Q903
DC DET
IC902
B+
SWITCH
Q901,Q902
D850,852
(POWER)
D851,853
(POWER)
PROTECT LATCH
Q801,Q805,Q806
TEMP.DET
Q809
TH801,803,808
PTH801
D820,822,827,832
D803
+45V
(B+)
HI-VOLTAGE
DET
-45V
IC903,Q920
(B-)
S801-1
FILTER
OFF
LOW BOOST
IC102 (2/2)
LPF
5
6
L.P.F
IC302 (1/2)
5
7
RV301-1
RV301-2
FILTER
FILTER
EQUALIZER
RV102-1
INV. AMP
LOW
IC302 (2/2)
BOOST
(40Hz)
2
1
3
LOW BOOST
IC202 (2/2)
5
6
S801-2
FILTER
OFF
LPF
EQUALIZER
RV102-2
LOW
BOOST
(40Hz)
DC-DC CONVERTER
IC901
11
DRIVER
10
12
Q910
SWITCHING
Q912
REF.
REG
SWITCHING
14
Q913
8
DRIVER
9
Q911
1
2
15
16
11
11
LINE
SWITCH
Q102
DIFFERENTIAL
DRIVE
7
AMP
AMP
Q103
Q105
+16.7V
RV103
(B+)
BIAS
BOOST
BIAS
Q107
Q101
DIFFERENTIAL
DRIVE
AMP
AMP
–16.7V
Q104
Q106
(B-)
LINE
SWITCH
Q202
DIFFERENTIAL
DRIVE
7
AMP
AMP
Q203
Q205
+16.7V
RV203
(B+)
BIAS
BOOST
BIAS
Q207
Q201
DIFFERENTIAL
DRIVE
AMP
AMP
–16.7V
Q204
Q206
(B-)
LINE SWITCH
CONTROL
Q701,702
DC OFFSET
DET
Q802,Q803,Q804
DC-DC
CONVERTER
TRANSFORMER
T901
RECT
D911,917
SWITCHING
DRIVER
RECT
Q904,Q905,Q906
D909
RECT
D910
SWITCHING
DRIVER
Q907,Q908,Q909
RECT
D912,918
• Signal path
: AUDIO
XM-SD22X
CN804
BTL
POWER
1
AMP
Q108,Q110,Q112
L
2
OVER CURRENT
DET
Q114
POWER
AMP
SPEAKER OUT
Q109,Q111,Q113
CN805
BTL
POWER
1
AMP
Q208,Q210,Q212
2
R
OVER CURRENT
DET
Q214
POWER
AMP
Q209,Q211,Q213
B+REG
+16.7V
Q914
(B+)
+54V
(B+)
D919
+45V
RECT
(B+)
D905
-45V
RECT
(B-)
D906
D920
–54V
(B–)
B-REG
–16.7V
Q915
(B–)

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