Block Diagram; Power Supply Block Diagram - Panasonic DMR-EH55EC Service Manual

12 Block Diagram

12.1. Power Supply Block Diagram

VA1110,L1120 D1140,C1143
AC INLET
P1101
F1101
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
2
3
P1
12
S2B
2
S2A
3
P2
10
S1A
4
S1B
5
V2
8
V1
7
Q1200
(FEED BACK)
4 1
3 2
2
1 3
IC1200
(ERROR VOLTAGE DET.)
HOT COLD
POWER P.C.B.
Q1700
(REG.X SW+3.8V)
X SW+3.8V
1
S D
4 FET 2
G
IC1701 5
(DC/DC CONVERTER)
6
Current X SW+5.8V
1 Vin 8 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
2 1 1 Vin 8 4
Sense
FET
Gate 7
Drive
QR1800,QR1801
PW
SWITCHING 2 GND 6
ON
IC7401
(REG.PS+11.6V)
X SW+12V P1102 P1501
1 VIN E
12,13,14,15
H :ON
2
Q1509
(DR+12V OUT)
1
S D
2 FET 5
G
3 6
7
8
4
43
DMR-EH55EC / DMR-EH55EP / DMR-EH56EG
MAIN P.C.B.
P1102 P1501
X SW+3.8V
16,17,19
P1102 P1501
3,4,5,6
RESET +5.2V
IC1505
(REG.X SW+3.3V)
3 CONT
VOUT 5 X SW+3.3V
1 VIN GND
2
IC1521
(REG.ANA+3.3V)
ANA+3.3V
8 VIN VOUT 1
GND CONT
4 5
FROM
DI P ON H
TIMER
IC7501- 44
SECTION
T7501
DISPLAY HEATER
POWER SWITCHING
IP1501 IP7501 TRANSFORMER
1 2 1 2 1 7
D7506
IC7507- 8
VOUT 3 PS+11.6V IC3001- 46 ,IC4009- 8 ,IC4012- 8
GND
5
FROM
PWR SAVE H :ON
TIMER
IC7501- 79
SECTION
QR7401
( H :ON)
DR+12V
FROM
DR P ON H
TIMER
IC7501- 42
SECTION
QR1501
( H :ON)
DMR-EH55EC/EP,EH56EG
Power Supply Block Diagram
A
B
IC7505- 1
IC7501- 16
C
D
E
UNREG +38V
F
G
H