S3. Block Diagram; S3.1. Main P.c.b. Power Supply Block Diagram; S3.1.1. Main P.c.b. Power Supply Block Diagram (1 - Panasonic DMR-EH49ECA Service Manual

S3. Block Diagram

S3.1. Main P.C.B. Power Supply Block Diagram

S3.1.1. Main P.C.B. Power Supply Block Diagram (1)

VA1110,L1120,L1121 D1140,C1143
AC INL ET
P1101 SURGE
F1101
SUPPRESSOR
RECTIFIER
AND
SURGE
ABSORBER
IC1150
(SWITCHING)
VIN 7
2 F/B 9
5
Z/C GND VCC
1 3 4
D1151
D1160
D1161
D1152
D1156
Q1160
(POWER CONT.)
POWER P.C.B.
T1150
POWER
SWITCHING
TRANSFORMAR D1270
1
2
3
P1 G
6 7
G
8
P2
4
NS12
11
B1
2
B2 NS12
1
12
Q1200
(FEED BACK)
4 1
3 2
4
3 2
IC1201
(ERROR VOLTAGE DET.)
2
1 3
IC1200
(ERROR VOLTAGE DET.)
Q1220
(FEED BACK)
4 1
QR1220
P SAVE L
3 2
P1102 P1501 P7402
1
HOT COLD
MAIN P.C.B.
IC1601
(DC/DC CONVERTER)
VIN
1
2 V5
P1102 P1501
5, 6, 7, 8
Q1509
(DR+12V OUT)
S D
4 FET
G
3
IC1730
(DC/DC CONVERTER)
Current
1 Vin
Sense
2 V5
P59001 FROM DIGITAL P.C.B.
TIMER BLOCK SECTION
25
S-4
Q1600
(REG.X SW+5.8V)
1 5
S D
2 FET 6
G
3 7
8
CURRENT
8 4
SENSE
FET
GATE 7
DRIVE
GND 6
T7501
DISPLAY HEATER
POWER SWICHING
Q7502, QR7501
IP7501 TRANSFORMER
POWER
1 2 SUPPLY 1 7
CONTROL
D7506
1 DR+12V
2
5
6
QR1501
( :ON)
H
Q1730
(REG.X SW+5.8V)
X SW +3.8V
1
S D
8 4 FET 2
G
5
FET
Gate
7
Drive 6
3
GND 6
DMR-EH49A, EH59A, EX79A
Main P.C.B. Power Supply Block Diagram (1/2)
A
X SW+5.8V
P7402 P59001
TO DIGITAL P.C.B.
30, 32
B
UNREG +38V C
D
FROM DIGITAL P.C.B.
DR P ON
P7402 P59001
ANALOG TIMER
36
BCLOCK SECTION
E