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
Summary of Contents for DMR-EH49ECA
Page 5: ...5 2 2 Precaution of Laser Diode ...
Page 8: ...8 3 3 Caution for DivX ...
Page 10: ...10 4 Specifications ...
Page 11: ...11 ...
Page 12: ...12 ...
Page 14: ...14 ...
Page 40: ...40 10 1 2 Checking and Repairing of RAM Digital P C B Module ...
Page 41: ...41 10 1 3 Checking and Repairing of Main P C B ...
Page 42: ...42 10 1 4 Checking and Repairing of HDD ...
Page 43: ...43 10 2 Caution for Replacing Parts 10 2 1 Items that should be done after replacing parts ...
Page 56: ...S 11 ...
Page 70: ...S 25 ...
Page 80: ...S 35 ...
Page 85: ...S 40 ...