Read Panasonic SA-VKX20GA / SA-VKX20GC / SA-VKX20GS Service Manual online
122
18.8. SMPS Circuit
A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
12
13
14
C
D
B
E
G
H
F
J
SMPS CIRCUIT
SCHEMATIC DIAGRAM - 18
SA-VKX20GA/GC/GS SMPS CIRCUIT
2/2
1/2
TO SMPS
SECTION (2/2)
SECTION (2/2)
P1
1
2
3
4
I
TO
D-AMP CIRCUIT
(ZJ5901*)
IN SCHEMATIC
DIAGRAM - 17
D-AMP CIRCUIT
(ZJ5901*)
IN SCHEMATIC
DIAGRAM - 17
B
TO
MAIN CIRCUIT
(ZJ2701*)
IN SCHEMATIC
DIAGRAM - 5
MAIN CIRCUIT
(ZJ2701*)
IN SCHEMATIC
DIAGRAM - 5
: +B SIGNAL LINE
: -B SIGNAL LINE
2
3
1
IC5701
C5HACYY00005
SWITCHING REGULATOR
3
1
2
B0ABSM000008
D5801
R5835
2.2K
2.2K
R5833
2.2K
R5832
18K
R5863
18K
R5862
3.3K...GA/GS 4.7K...GC
R5861
B1GBCFJN0038
QR5801
R5801
22K
D5804
R5800
15K
R5860
10K
R5864
10K
0.1
C5831
0.1
C5832
3
4
1
2
6
5
CN5801
B1ADCF000001
Q5860
C5800
0.01
C5826
0.01
100K
R5702
100K
R5703
50V1000
C5805
50V1000
C5808
B0HFRJ000012
D5803
22
R5720
D5731
B0EAMM000057
3
2
1
D5702
B0ZAZ0000052
C5713
0.01
ETS39AG4M6AD
MAIN TRANSFORMER
C5821
0.01
C5819
0.01
C5822
0.01
C5820
0.01
SYNC
SYS3.3
2.2K
R5805
15K
R5806
A
R
3
2
C
1
C0DABFC00002
SHUNT REGULATOR
SWITCH
CURRENT
LIMITING SWITCH
CURRENT
LIMITING SWITCH
FEED BACK
IC5801
0.1
C5818
0.1
C5812
1K
R5803
100V0.1
C5817
47K
R5804
8.2K
R5814
0.1
C5810
12K
R5802
C5896
0.1
5
7
8
6
2
1
4
3
9
11
CN5802
PCONT
B1GBCFLL0037
QR5810
330
R5809
330
R5807
1K
R5730
B0BC6R100010
D5725
2.2K
R5808
4
3
1
2
B3PBA0000402
PC5720
FEED BACK
B3PBA0000402
PC5701
R5810
330
R5817
330
4
3
1
2
120
R5724
3
1
2
B0ABSM000008
D5802
11
13
14
12
10
8
6
5
7
9
18
15
16
17
1
4
3
2
T5701
C5813
35V330
R5722
1.2K
C5722
1000P
1000P
C5721
220P
R5729
10K
R5728
100K
C5728
1000P
D5724
D5727
B0ACCK000012
B0ACCK000012
R5732
100
R5726
0.27...GC
0.1...GA/GS
B1ABCF000176
Q5722
10K
R5721
D5722
B0BC019A0007
B0ACCK000012
D5723
C5720
0.1
B0BC010A0007...GA/GS
B0BC018A0267...GC
D5721
J0JBC0000019
L5704
D5726
B0EAKM000117
D5729
B0EAMM000057
SWITCH
1K
R5723
B1ADCF000001
Q5721
B0ACCK000012
D5728
B1BABG000007
Q5720
D
C5737
820P
C5726
0.1
C5730
1
C5724
D5732
B0BC035A0007
50V56
R5733
47K
C5725
0.1
C5723
470P
S
GND
FB
VCC
OLP/SS
OCP/BD
+30V_SENSE
PCONT
DC18V
AM_BP
10
NC
DCDET
DC18V
+18V.-12V_GND
+18V.-12V_GND
GND
GND
-30V_SENSE
-30V_SENSE
SYS3.3
SYNC
NC
+30V_SENSE
4
5
7
6
TEMPERATURE DETECT
B1GBCFJJ0051
Q5862
TEMPERATURE DETECT
B1ABCF000176
Q5861
TEMPERATURE DETECT
POWER CONTROL
C5869
0.1
C5870
0.1
C5844
10
C5843
10
TH5860
D4CC11040013
PCONT
VCC
VIN
DRAIN
+30V
+FAN 18V
GND
+18V
-30V
AMPGND
AM_BP
Q5803
B1BABG000007
SWITCH
AM_BP
R5820
10K
B0ACCK000012
B1GDCFGA0018
QR5802
R5841
120K
R5840
82K
DC DETECT
2.2K
R5834
R5727
0.27
470
R5828
470
R5824
470
R5827
470
R5823
470
R5826
470
R5822
470
R5825
470
R5821
R5837
2.2K
2.2K
R5836
GND
HEATSINK*
G2
G1
HEATSINK*
G2
G1
FOR GC
1
TP
K19...GA/GS
0
K10...GC
0
NOTE: “ * ” REF IS FOR INDICATION ONLY
GC GA/GS
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