Power Supply - Panasonic SA-PT480PH Service Manual

14.8. Power Supply

IC5799
MIP2F20MSSCF
SWITCHING POWER
SUPPLY CONTROL
TR 3
VCC 4
S 7
SD 8
D 5
FB 2
VDD 1
AC INLET P.C.B.
P5701
AC INLET
L5702 L5703
TH5702
F1
3 4 3
2 1 2
DZ5701
S5701
VOLT ADJ
VOLTAGE
SELECTOR P.C.B.
IC5701
C5HACYY00003
SWITCHING
REGULATOR
D 1
D5710
VCC 4
D5709 D5706
OCP/BD 7
FB 6
GND 3
T5751
SUB
TRANSFORMER
D5896
7
D5716
6
10
5
2
3
PC5799
FEED BACK
3 2
4 1
PC5702
SYNC SWITCH
1 4
2 3
D5719
4
1
RY701
2 4
1 3
T5701
MAIN
D5701
TRANSFORMER
16
4
5 17
6
14
13
7 11
12
8
9
15
Q5720
D5712
CURRENT
LIMITING 2
SWITCH
1
PC5720
FEED BACK
4 1
3 2
HOT COLD
SMPS P.C.B.
JW2*
SYS5V
2
IC5899
C0DBZMC00006
SHUNT
REGULATOR
3 K VREF 4
Q5898
SYNC JW2*
INVERTER
1
DC18V CN5802
1
Q5899
JW2*
PCONT
SWITCH
9
D5802
QR5862
DCDET JW2*
DC DETECT
3
D5714
JW1*
FAN 18V
1
JW1*
+51V
5,6
FEED BACK POWER CONT JW2*
CIRCUIT 10
IC5801
C0DABFC00002
SHUNT
REGULATOR
Q5863
108
MAIN P.C.B.
CN2004
SYS6V
2
SMPS P.C.B.
TO
CN2004
MAIN(SYSTEM CONTROL)
1
IC2901
POWER P.C.B.
C0DBAYY00729
SWITCHING
REGULATOR
CONTROLLER
Q2903
CN2916 DC 18V OUT2 10 DC5V CN2917 CN5803
12 VCC REGULATOR
1 3 3
OUT1 11
DC12V CN2916 CN5802
REGULATOR
3 3
Q2902
CN2004 FROM
9 MAIN(SYSTEM CONTROL)
TO
CN2004
MAIN(SYSTEM CONTROL)
3
TO
IC5400 DIGITAL AUDIO
C0DBEKG00004
VOLTAGE
REGULATOR
3.3V
CN5400 +18V FAN
VDD
2 IN VOUT 4
1
D5405
CN5400
+55V
PVDD
5,6
D5407
TO
DCDET
DIGITAL AUDIO
D-AMP P.C.B.
FROM
CN2004
10 MAIN(SYSTEM CONTROL)
SA-PT480PH POWER SUPPLY(1/2) BLOCK DIAGRAM
1
2
JW2* CN2004 DC5V
3
4 4
JW2* CN2004 DC9V
4
7 7
CN5402 CN2006
17 2
5
CN5402 CN2006
10 9
CN5402 CN2006
18 1
TO POWER SUPPLY
SECTION (2/2)