Block Diagram; Power Supply Block Diagram - Panasonic DMR-ES20EG Service Manual

17 Block Diagram

17.1. Power Supply Block Diagram

VA1110,L1120,L1121 D1140,C1143
AC INLET
F1101
P1101
250V2A
SURGE RECTIFIER
SUPPRESSOR
AND
SURGE
ABSORBER
IC1150
(SWITCHING IC)
VIN 7
2 F/B 9
5
Z/C GND VCC
1 3 4
T1150
POWER
SWITCHING
TRANSFORMER
D1270
1
P1 S2D
7 18 2 X SW+12.4V
3
S2C
17
S2B
16
S2A
15
P2
5
S1A
14
S1B
13
V2
3
S1C
12
V1 S1D
2 11
Q1200
(FEED BACK)
4 1
3 2
2
1 3
IC1200
(ERROR VOLTAGE DET.)
HOT COLD
IC1400
(DC/DC CONVERTER)
1 VIN VOUT 8 D+1.5V
ON/OFF GND
2 5
QR1301
(POWER ON H :ON)
Q1700
(REG.X SW+3.8V)
1
S D
4 FET 2
G
IC1701
5
(DC/DC CONVERTER)
6
Current 8
1 Vin 3
Sense
FET
Gate 7
Drive
PW
2 GND 6
ON
Q1600
(REG.X SW+5.8V)
1 5
S D
2 FET 6
G
IC1601 3 7
(DC/DC CONVERTER)
IP1601 8
Current 8
2 1 1 Vin 4
Sense
D1401
FET
Gate 7
Drive
QR1800,QR1801
PW
SWITCHING 2 GND 6
ON
QR1303
(POWER ON/OFF
CONTROL SW.)
Q1270
(DR+12V OUT)
1
S D
2 FET 5
G
3 6
7
8
4
37
DMR-ES20EG / DMR-ES20EP / DMR-ES20EE
POWER P.C.B. MAIN P.C.B.
D+1.5V P1102 P1501
12,13
POWER ON H P1102 P1501
11
X SW+3.8V P1102 P1501
14
X SW+5.8V P1102 P1501
2,3
IC1401
(REG.DR+5V)
1 VIN VOUT 3
H :ON GND
2 5
DR P ON H P1102 P1501 DR P ON
15 IC7501- 49
QR1302
( :ON)
H
DR+5V P1102 P1501
20,21
TO
DR+12V P1102 P1501 DVD-RAM/R DRIVE
16,17
QR1304
( H :ON)
IP1501
X SW+12.4V P1102 P1501
1
4,5
DMR-ES20EG/EP/EE
Power Supply Block Diagram
A
B
C
D
FROM
H
TIMER
SECTION
2 E