Read Sony XM-7557 Service Manual online
XM-7557
9
9
5-2. BLOCK DIAGRAM – POWER SECTION –
7
8
9
2
5
6
10
4
3
CNB805
CN802
CNJ801
TO
AMPLIFIER
BOAD
CNP805
SUB-WOOFER
BATTERY
GND
REMOTE
4-CHANNEL
BATTERY
4
5
6
7
3
1
3
1
CNP804
POWER BOARD
OFFSET CONTROL
Q809-810
OFFSET LED
SET
Q804
THERMAL DETECTOR
(For H,S)
TH903
THERMAL DETECTOR
(For TRANS)
TH904
NFB
S802
SWITCH
Q901-902
SWITCH
Q904
SWITCH CTL
Q903
THERMAL
CONTROL
CONTROL
Q918
THERMAL
SWITCH
Q917
THERMAL
LED SWITCH
Q806
11
10
1
1
4
1
2
3
2
2
15
16
3
3
8
9
12
14
REF-REG
THERMAL SWITCH
TH905,Q919
DRIVER
Q921
INVERTER
Q924,926,928
DRIVER
Q920
INVERTER
Q925,927,929
T902
SWITCHING
CONTROL
Q922-923
Q922-923
11
10
1
2
15
3
8
9
12
14
REF-REG
DRIVER
Q908
INVERTER
Q911,913,915
DRIVER
Q907
INVERTER
Q912,914,916
T901
SWITCHING
CONTROL
Q909-910
Q909-910
THERMAL SWITCH
TH902,Q906
SWITCH
Q905
D901
F903 (25A)
(25A)
(25A)
(25A)
F904
F901
F902
S801
HI-V
HI-C
+28V
-28V
TO
AMPLIFIER
BOARD
AMPLIFIER
BOARD
+28V
-28V
TO
AMPLIFIER
BOARD
AMPLIFIER
BOARD
D905
D912
D913
D906
IC903
DC DET
IC901
DC DET
DC-DC
CONVERTER
IC904
DC-DC
CONVERTER
IC902
THERMAL
DET
TH901
D904
D903
OVER CURRENT
CONTROL
Q807-808
Q807-808
OVER CURRENT
LED SWITCH
Q805
D908
D909
OR
D806
OR
OR
D907
16
MUTE CONTROL
D808,Q811
MUTE SWITCH
Q812
OFF
ON
S801
MODE
HI-C
HI-V
S801
D911
D910
HI-V
HI-C
MUTE ENABLER
IC813
D801
HI-VOLTAGE
D802
HI-CURRENT
D803
OVER CURRENT
G
G
G
R
D804
OFFSET
G
R
D805
THERMAL
G
R
B+
B+
B-
B+
B-
Q801
SWITCH
Q802
SWITCH
Q803
SWITCH
CNB804
LED BOARD
09
MODE
MODE
+12V
+12V
4
1
2
3
4
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