Block Diagram - Power Section - Sony STR-DB2000 Service Manual

Q Q
3 7 6 3 1 5 1 5 0
6-10. BLOCK DIAGRAM – POWER Section –
V+B
VOL-DC AMP
IC903
VOL-DC 5 7
W
(Page 20)
VOL-SW
+3.3V
V+3.3V REGULATOR
IC1853
V+5V
V+9V
V+12V
V–9V
+2.6V DSP
+5V DSP
+3.3V DSP
T E
L 1 3 9 4 2 2 9 6 5 1 3
B+ SWITCH
+5V
Q913
+7V
POWER CONTROL
(Page 18) O V POWER SWITCH
Q912
B– SWITCH
Q911
–5V
–12V
–10V
–10V REGULATOR
IC662
+12V
+10V
–10V REGULATOR
IC661
+5V
A+5V REGULATOR
IC691
(AEP, UK)
+3.3V
TUN+3.3V REGULATOR
IC2016
+5VB
+3.3VB
w w w
POW RY
.
(Page19) R
POW CHG
STOP
+B SWITCH
Q904
+
Q908
DISCHARGE
Q909
BUFFER
3 1
Q01, 905, 906
ERROR AMP DRIVER
IC103 Q101, 102
+6V REGULATOR
Q202
+5V
REGULATOR
IC1852
+9V
REGULATOR
IC1851
+2.6V
REGULATOR
IC2206
+5V
REGULATOR
IC910
+3.3V
REGULATOR
IC909
+5V +7V
REGULATOR REGULATOR
IC904 IC905
D405
4 3
SHUNT
2
REGULATOR
IC301
B+/B– SWITCH
IC913
5
–5V –12V
1 6 REGULATOR REGULATOR
IC906 IC302
D404
+5V
REGULATOR
IC912
+3.3V
REGULATOR
IC911
x a o
y
i
SWITCHING
Q914
http://www.xiaoyu163.com
8
T001
POWER
TRANSFORMER
SWITCHING REGULATOR
D101 IC001
RECT
SWITCHING
5 OUT CS
Q001, 002
6 VCC IS
D102
FB
D009
2
RECT
ISOLATOR
SHUNT
PC002
REGULATOR
D008 Q003
IC101
ISOLATOR ISOLATOR
PC004 PC004
ISOLATOR
PC001
T002
POWER
D201
TRANSFORMER
RECT
+12V
REGULATOR
IC201
D202
RECT
–9V
REGULATOR
IC202
SWITCHING REGULATOR
D301 Q Q
3 7 IC002 6 3
RECT
SWITCHING
5 OUT CS 8
Q004
6 VCC IS 3
FB
D013
2
D302, 303 RECT
RECT
ISOLATOR
PC005
T003
POWER
TRANSFORMER
D401
RECT
D402
D021
RECT SWITCHING
REGULATOR
ISOLATOR
IC003
PC006
SHUNT
u 1 6 3 REGULATOR
IC401
ISOLATOR
.
PC008
ISOLATOR
PC007
25 25
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2 4
9 9 8
D001
RECT
8
3
TH001
L002 L001
D010
RECT
TH002
1 5 1 5 0 8 9 2 4
D022
Q005
RL001
POWER ON/OFF
RELAY DRIVE
Q401
L010
D015 – 018
(AC IN)
RECT
D014, 019
m
RECT
c o
STR-DA2000ES/DB2000
2
9 9
9 8 2 9 9