S-4
S3.1. Main P.C.B. Power Supply Block Diagram
S3.1.1. Main P.C.B. Power Supply Block Diagram (1)
UNREG +38V
D7506
C
X SW +3.8V
DR P ON
P SAVE L
E
B
A
D
X SW+5.8V
T7501
7
1
IP7501
2
1
H
DR+12V
(
:ON)
QR1501
FET
D
S
G
Q1509
(DR+12V OUT)
4
1
2
5
6
3
P1102
P1501
5, 6, 7, 8
P59001
P7402
30, 32
P7402
P59001
36
FROM DIGITAL P.C.B.
ANALOG TIMER
BCLOCK SECTION
TO DIGITAL P.C.B.
DISPLAY HEATER
POWER SWICHING
TRANSFORMER
POWER
SUPPLY
CONTROL
Q7502, QR7501
QR1220
AC INLET
P1101
SURGE
SUPPRESSOR
AND
SURGE
ABSORBER
F1101
VA1110,L1120,L1121
D1140,C1143
RECTIFIER
T1150
POWER
SWITCHING
TRANSFORMAR
6
P1
4
2
1
P2
B1
B2
G
G
NS12
NS12
8
11
1
3
2
D1270
1
2
7
6
V5
VIN
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
4
3
2
1
Q1220
(FEED BACK)
1
2
3
IC1200
(ERROR VOLTAGE DET.)
3
4
2
IC1201
COLD
HOT
POWER P.C.B.
8
12
7
1
2
7
6
Vin
V5
FET
Gate
Drive
GND
IC1730
(DC/DC CONVERTER)
8
Current
Sense
FET
D
S
G
1
2
5
6
Q1730
(REG.X SW+5.8V)
4
3
GND
CURRENT
SENSE
FET
GATE
DRIVE
MAIN P.C.B.
P1102
P1501
1
P7402
P59001
25
FROM DIGITAL P.C.B.
TIMER BLOCK SECTION
(ERROR VOLTAGE DET.)
(FEED BACK)
DMR-EH49A, EH59A, EX79A
Main P.C.B. Power Supply Block Diagram (1/2)
Q1160
(POWER CONT.)
D1151
D1160
D1161
2
1
3
4
9
5
IC1150
(SWITCHING)
VCC
GND
Z/C
F/B
7
VIN
D1152
D1156
S3. Block Diagram
Содержание DMR-EH49ECA
Страница 5: ...5 2 2 Precaution of Laser Diode ...
Страница 8: ...8 3 3 Caution for DivX ...
Страница 10: ...10 4 Specifications ...
Страница 11: ...11 ...
Страница 12: ...12 ...
Страница 14: ...14 ...
Страница 40: ...40 10 1 2 Checking and Repairing of RAM Digital P C B Module ...
Страница 41: ...41 10 1 3 Checking and Repairing of Main P C B ...
Страница 42: ...42 10 1 4 Checking and Repairing of HDD ...
Страница 43: ...43 10 2 Caution for Replacing Parts 10 2 1 Items that should be done after replacing parts ...
Страница 56: ...S 11 ...
Страница 70: ...S 25 ...
Страница 80: ...S 35 ...
Страница 85: ...S 40 ...