Smps Circuit - Panasonic SA-PT875GA Service Manual

17.6. SMPS Circuit

1 2 3
SCHEMATIC DIAGRAM - 14
A
G SMPS CIRCUIT
CN2016
F+ 1
F- 2
-VP 3
GND
4
B GND
5
TO
B
5.3V 6
MAIN CIRCUIT
5.3V
7
(H2901*)
MOTOR_+9V 8
IN SCHEMATIC
TUNER_+9V 9
DIAGRAM - 9
MGND 10
+18V 11
SYS5VGND
12
SYS5V 13
SYNC
14
Q2901
2SB0621AHA
-7V REGULATOR
C
Q2902
B1ADCF000001
POWER CONTROL
D
E
Q2903
2SC3940ARA
+7V REGULATOR
CN2017
F
+7V 1
B AGND
2
TO
AGND
3
MAIN CIRCUIT
-7V
4
(H2900*)
DC_DET2 5
IN SCHEMATIC
R2010 1K
PCONT 6
DIAGRAM - 9
ECO_CTL
7
NC 8
G
K8 0
H
1 2 3
4 5 6
: +B SIGNAL LINE : -B SIGNAL LINE
R2910
1.5
R2935
4.7K
IC2903
R2911 C0DAAMH00012
1K
SWITCHING REGULATOR
5 4 3 2 1
L2902
G0A101ZA0028
+5.3V
R2921 R2920
3.9K
390
G0A200D00002
AGND
IC2900
3 2 1
C0DAAYY00042
SWITCHING REGULATOR
E2900
5 4 3 2 1
MOT_+9V
L2903
G0A101ZA0028
+9V
C2932 0.1
R2923
R2906
1.2K 6.8K
D2913
B0JCPD000025
R5864
15K
4 5 6
7 8 9
+9V
F+
F-
-VP
+5.3V D2909
MAZ82400HL B0EAMM000057
+9V
MGND
DC_18V
L2914
SYS_GND
J0JBC0000041
-VP
SYS5V
SYNC
D2903
B0EAMM000057
MGND
L2915
-13V
J0JBC0000041
+5.3V
F-
L2916 D2906
J0JBC0000041 B0JAME000029
F+
+18V.-12V_GND
FB
VCC
FAN GND
VDD
L2911
R2913
0
+18V DC_18V
SYNC
Q5898
B1ABCF000176
INVERTER
R5886
100
R2930
4.7K
ECO_CTL
R5865
4.7K
VSS
Q5863
B1ABCF000176
ECO CONTROL
+18V.-12V_GND
SYS5V
C
DCDET
1
PCONT
ECO_CTL
3
A
2
R
IC5899
C0DAEMZ00001
SHUNT REGULATOR
SYS_GND
7 8 9
134
10 11 12
G0C390JA0055
D2908
T2900
G4D1A0000117
SWITCHING TRANSFORMER
4 Q2900
5 3 B1BABK000001
PSAVE CONTROL
6 2
7 1
8 9
R2902 C2902
47 5600P
PC5720
B3PBA0000402
R5809 R5807 FEED BACK R5730
1K
330 330
1 4
PC5702
2 3
B3PBA0000402
SYNC SWITCH
D5725
MAZ80620ML
4 1
3 2
C
1
IC5801
R5806
15K
C0DABFC00002
3
C5818 A SHUNT REGULATOR
0.1
2
R
PC5799
B3PBA0000402
R5894 FEED BACK
330
1 4
R5817
R5829
2.2K
22
2 3
R5818
100
T5751
C5820 ETS19AB2A6AG
6.3V2200
BACKUP TRANSFORMER
R5798 D5798
22 B0EAMM000057
6
D5896
C5798
B0EAMM000057
50V22
7 5
8 4
9 3
R5786
200K
10 2
C5790
2200P
1
D5793
B0HAMP000094
C5705
F1BAF1020020
1000P
1/2 2/2
SA-PT875GA/GC/GS
10 11 12
13 14
P1
FP2901
L2910
1A
1 2
TO SMPS
SECTION (2/2)
1
2
D5730
MA2YF8000L
IC5799
MIP2F20MSSCF
SWITCHING REGULATOR
5 D VCC 4
TR 3
C5795
1000P
7 S FB 2
8 S VDD 1
R5797
15K
4
5
SMPS CIRCUIT
13 14