Panasonic DMR-EH58EC, Service Manual

Page: 47 / 102

11 Block Diagram
11.1. Power Supply Block Diagram
H
H
H
H
TIMER +5V
UNREG +38V
8 IC7503-
D7506
TO
U/V
TUNER
A
B
C
D
F
E
X SW+3.3V
X SW+3.8V
IC7501- 16
(X SW+3.3V OUT)
Q1502
DI P ON
IC7501- 44
SECTION
TIMER
FROM
14,15
P1501 P1102 X SW+3.8V
1,2,3
P1501 P1102 X SW+5.8V
9,10,11,12
P1501 P1102 X SW+12V
TRANSFORMER
POWER SWITCHING
DISPLAY HEATER
T7501
7 1
IP1501
2 1
IP7501
2 1
PS+11.6V 8 8 46 IC3001- ,IC4009- ,IC4012-
PWR SAVE :ON
IC7501- 79
SECTION
TIMER
FROM
( :ON)
QR7401
(REG.PS+11.6V)
IC7401
VOUT VIN 3
5
:ON
2
1
GND
H
H
DR+12V
DR P ON
IC7501- 42
SECTION
TIMER
FROM
( :ON)
QR1501
FET
D S
G
Q1509
(DR+12V OUT)
1
2
3
5
6
7
8
4
AC INLET
P1101
SURGE
SUPPRESSOR
AND
SURGE
ABSORBER
F1101
VA1110,L1120,L1121 D1140,C1143
RECTIFIER
T1150
POWER
SWITCHING
TRANSFORMER
6
P1
2
1 3 4
9
5
IC1150
(SWITCHING IC)
VCC GND Z/C
F/B 4
2
1
P2
B1
B2
7 VIN
G
G
NS12
NS12
8
11
1
3
2
D1270
1
2
7
6
Vin
V5
FET
Gate
Drive
GND
IC1601
(DC/DC CONVERTER)
FET
D S
G
2
4
5
6
7
1
3
8
Q1600
(REG.X SW+5.8V)
4
3 2
1
Q1200
(FEED BACK)
1
2
3
IC1200
(ERROR VOLTAGE DET.)
COLD HOT
POWER P.C.B. MAIN P.C.B.
DMR-EH58EC/EP,EH585EG
Power Supply Block Diagram (1/2)
8
Current
Sense
12
7
DMR-EH58EC / DMR-EH58EP / DMR-EH585EG
47