Block Diagram; Power Block Diagram - Panasonic DMR-EX75EG Service Manual

12 BLOCK DIAGRAM

12.1. POWER BLOCK DIAGRAM

VA1110,L1120 D1140,C1143
AC INLET 250V T2AL
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
Q1502
(DR+12V OUT)
1
S D
2 FET
G
3
4
47
DMR-EX75EG / DMR-EX75EC / DMR-EX75EB / DMR-EX85EG / DMR-EX85EB
MAIN P.C.B.
P1102 P1501
X SW+3.8V
16,17,19
P1102 P1501
3,4,5,6
X SW+3.3V
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
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
DMR-EX75EG/EC/EB
QR1501
DMR-EX85EG/EB
( :ON)
H
POWER 1/2
BLOCK DIAGRAM
A
B
IC7501- 16
C
D
E
UNREG +38V F
G
H