Block Diagram; Power Supply Block Diagram - Panasonic DMR-EX77EG Service Manual

11 Block Diagram

11.1. Power Supply Block Diagram

VA1110,L1120,L1121 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
D1400
T1150
POWER
SWITCHING
TRANSFORMER
D1270
1
2
3
P1 S1A
12 1
S1B
2
S1C
3
P2
10
S2
4
S3B
5
V2
8
V1 S3A
7 6
Q1200
(FEED BACK)
4 1
3 2
2
1 3
IC1200
(ERROR VOLTAGE DET.)
HOT COLD
DMR-EX77EG / DMR-EX77EC / DMR-EX77EC1 / DMR-EX77EB / DMR-EX87EG / DMR-EX87EC / DMR-EX87EC1 / DMR-EX87EB
POWER P.C.B.
X SW+3V
X SW+3.8V
X SW+5.8V
Q1600
(REG.X SW+5.8V)
1 5
S D
2 FET 6
G
IC1601 3 7
(DC/DC CONVERTER)
8
Current
1 Vin 8 4
Sense
FET
Gate 7
Drive
QR1800,QR1801
PW
SWITCHING 2 GND 6
ON
IC7401
X SW+12V P1102 P1501
(REG.PS+11.6V)
9,10,11
1 VIN
H :ON
2
Q1509
(DR+12V OUT)
1
S D
2 FET
G
3
4
45
MAIN P.C.B.
P1102 P1501
X SW+3V
12,13
P1102 P1501
X SW+3.8V
15
P1102 P1501
1,2,3
TIMER +5V
X SW+3.3V
Q1502
(X SW+3.3V OUT)
IC1521
(REG.ANA+3.3V)
8 VIN VOUT 1 ANA+3.3V
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 UNREG +38V
D7506
PS11R6V P7413 PS90001
TO BACK END P.C.B.
9
VOUT 3 PS+11.6V IC3001- 46 ,IC4009- 8 ,IC4012-
GND
5
FROM
PWR SAVE H :ON
TIMER
IC7501- 79
SECTION
QR7401
( H :ON)
5
DR+12V
6
7
8
FROM
DR P ON H
TIMER
IC7501- 42
SECTION
QR1501
( H :ON)
DMR-EX77EG/EC/EC1/EB,
EX87EG/EC/EC1/EB
Power Supply Block Diagram (1/2)
A
B
C
IC7503- 8
IC7501- 16
D
E
F
TO
U/V
TUNER
8
G
H