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Block Diagram - Power Section - Sony XM-7547 Service Manual

Stereo power amplifer
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5-2. BLOCK DIAGRAM – POWER SECTION –
POWER BOARD
CNB805
OFFSET LED
OFFSET CONTROL
7
SET
TO
Q809-810
Q804
AMPLIFIER
D806
BOARD
OR
CNP805
8
MUTE ENABLER
MUTE CONTROL
MUTE SWITCH
9
IC813
D808,Q811
Q812
4
1
2
3
2
OVER CURRENT
5
CONTROL
Q807-808
MODE
S801-3
OVER CURRENT
LED SWITCH
Q805
6
NFB
HI-C
HI-V
S802
ON
OFF
10
3
THERMAL DETECTOR
(For H,S)
D908
TH903
THERMAL
OR
CONTROL
THERMAL DETECTOR
Q918
(For TRANS)
TH904
D909
4
OR
CN802
F903 (25A)
+12V
SWITCH
BATTERY
Q901-902
F904 (25A)
GND
F901 (25A)
SWITCH CTL
BATTERY
Q903
+12V
F902 (25A)
D901
CNJ801
SWITCH
REMOTE
Q904
SWITCH
Q905
09
D911
MODE
S801-4
THERMAL SWITCH
HI-V
TH905,Q919
HI-C
IC903
12
DC DET
REF-REG
D910
2
3
14
1
1
4
2
15
16
D907
THERMAL
THERMAL
3
SWITCH
LED SWITCH
Q917
Q806
DC-DC
CONVERTER
IC904
THERMAL SWITCH
TH902,Q906
MODE
THERMAL
S801-2
DET
TH901
HI-V
D904
12
REF-REG
HI-C
14
2
3
D903
1
2
1
4
D911
IC901
15
DC DET
16
3
DC-DC
CONVERTER
IC902
CNP804
MODE
S801-1
HI-C
HI-V
D912
T902
DRIVER
11
INVERTER
Q921
Q924,926,928
10
SWITCHING
CONTROL
Q922-923
INVERTER
DRIVER
Q925,927,929
8
Q920
D913
9
D905
T901
DRIVER
11
INVERTER
Q908
Q911,913,915
10
SWITCHING
CONTROL
Q909-910
INVERTER
DRIVER
Q912,914,916
8
Q907
D906
9
9
9
LED BOARD
D803
OVER CURRENT
5
4
D801
D802
7
HI-VOLTAGE
HI-CURRENT
6
3
1
G
G
R
G
B +
Q801
Q802
CNB804
SWITCH
SWITCH
+28V
TO
AMPLIFIER
BOARD
-28V
B –
B +
+28V
TO
AMPLIFIER
BOARD
-28V
B –
XM-7547
D804
D805
OFFSET
THERMAL
R
G
R
G
Q803
SWITCH
B+

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