AC INLET
P1101
SURGE
SUPPRESSOR
AND
SURGE
ABSORBER
F1101
250V2A
VA1110,L1120,L1121
D1140,C1143
RECTIFIER
T1150
POWER
SWITCHING
TRANSFORMER
7
P1
2
1
3
4
9
5
(SWITCHING IC)
VCC
GND
Z/C
F/B
5
3
2
P2
V2
V1
7
VIN
S2D
S2C
S2B
S2A
S1A
S1B
S1C
S1D
18
17
16
15
14
13
12
11
1
3
2
D1270
X SW+12.4V
1
2
5
8
VIN
VOUT
ON/OFF GND
(DC/DC CONVERTER)
QR1301
(POWER ON :ON)
2
1
SWITCHING
QR1800,QR1801
1
2
7
6
Vin
PW
ON
FET
Gate
Drive
GND
(DC/DC CONVERTER)
FET
D
S
G
4
3
1
2
5
6
Q1600
(REG.X SW+5.8V)
QR1303
(POWER ON/OFF
CONTROL SW.)
QR1302
( :ON)
FET
D
S
G
Q1270
(DR+12V OUT)
1
2
3
5
6
7
8
X SW+12.4V
4
QR1304
( :ON)
FET
D
S
G
Q1700
(REG.X SW+3.8V)
4
3
1
2
5
6
1
2
7
(DC/DC CONVERTER)
6
Vin
GND
PW
ON
FET
Gate
Drive
4
3
2
1
Q1200
(FEED BACK)
1
2
3
(ERROR VOLTAGE DET.)
COLD
HOT
P1102
P1501
4,5
D+1.5V
P1102
P1102
P1501
P1501
11
12,13
P1102
P1501
2,3
P1102
P1501
15
P1102
P1102
P1501
P1501
20,21
16,17
TO
DVD-RAM/R DRIVE
P1102
P1501
14
X SW+12.4V
D+1.5V
X SW+5.8V
DR+5V
DR+12V
X SW+3.8V
DR P ON
IC7501- 49
FROM
TIMER
SECTION
POWER P.C.B.
MAIN P.C.B.
1
2
DMR-EH50EB/EG/EP,EH52EG
Power Supply Block Diagram
8
Current
Sense
8
Current
Sense
2
1
Current
Sense
8
1
2
7
(DC/DC CONVERTER)
6
Vin
GND
PW
ON
FET
Gate
Drive
FET
D
S
G
Q1400
(REG.DR+5V)
4
3
1
2
5
6
Vref
-
+
VCC
VOUT
5
4
3
2
P1103
1
P1103
4
(HDD PFAIL OUT)
DR+5V
DR+12V
22
P1501
P1102
TO
TIMER
SECTION
47
IC7501-
HDD PFAIL
TO
HDD
H
H
H
POWER ON H
DR P ON H
H
L
HDD PFAIL L
L
Summary of Contents for DMR-EH50EB
Page 2: ...2 ...
Page 3: ...3 ...
Page 39: ...12 3 Checking and Repairing of Main P C B 39 ...
Page 40: ...12 4 Checking and Repairing of DVD RAM Drive 40 ...
Page 41: ...12 5 Checking and Repairing of HDD 41 ...
Page 52: ...20 2 Packing Accessories Section 52 ...
Page 60: ...K7401 D0YBR0000002 CHIP RESISTOR 1 EB 60 ...
Page 66: ...R7304 D0GB101JA002 1 10W 100 1 66 ...
Page 74: ......
Page 75: ......
Page 76: ...1 A B C D 2 3 4 5 Nicam Decoder P C B DMR EH50EB EG EP EH52EG Nicam Decoder P C B VEP07A51A ...