11 Block Diagram
11.1. Power Supply Block Diagram
VA1110,L1120,L1121
D1140,C1143
AC INLET
P1101
F1101
SURGE
RECTIFIER
SUPPRESSOR
AND
SURGE
ABSORBER
IC1150
(SWITCHING IC)
VIN
7
2
F/B
9
5
Z/C
GND
VCC
1
3
4
D1400
T1150
POWER
SWITCHING
TRANSFORMER
D1270
1
2
3
P1
S1A
12
1
S1B
2
S1C
3
P2
10
S2
4
S3B
5
V2
8
V1
S3A
7
6
Q1200
(FEED BACK)
4
1
3
2
2
1
3
IC1200
(ERROR VOLTAGE DET.)
HOT
COLD
POWER P.C.B.
X SW+3V
X SW+3.8V
X SW+5.8V
Q1600
(REG.X SW+5.8V)
1
5
S
D
2
FET
6
G
IC1601
3
7
(DC/DC CONVERTER)
8
Current
1
Vin
8
4
Sense
FET
Gate
7
Drive
QR1800,QR1801
PW
SWITCHING
2
GND
6
ON
IC7401
X SW+12V
P1102
P1501
(REG.PS+11.6V)
9,10,11
1
VIN
H
:ON
2
Q1509
(DR+12V OUT)
1
S
D
2
FET
G
3
4
45
DMR-EH67GN / DMR-EH67GC / DMR-EH67GCS
MAIN P.C.B.
P1102
P1501
X SW+3V
12,13
P1102
P1501
X SW+3.8V
15
P1102
P1501
1,2,3
TIMER +5V
X SW+3.3V
Q1502
(X SW+3.3V OUT)
IC1521
(REG.ANA+3.3V)
8
VIN
VOUT
1
ANA+3.3V
GND CONT
4
5
FROM
DI P ON
H
TIMER
IC7501- 44
SECTION
T7501
DISPLAY HEATER
POWER SWITCHING
IP1501
IP7501
TRANSFORMER
1
2
1
2
1
7
UNREG +38V
D7506
VOUT
3
PS+11.6V
IC3001-
46
,IC4009-
8
,IC4012-
GND
5
FROM
PWR SAVE
H
:ON
TIMER
IC7501- 79
SECTION
QR7401
(
H
:ON)
5
DR+12V
6
7
8
FROM
DR P ON
H
TIMER
IC7501- 42
SECTION
QR1501
(
:ON)
H
DMR-EH67GN/GC/GCS
Power Supply Block Diagram (1/2)
A
B
C
IC7503-
8
IC7501- 16
D
E
F
TO
U/V
TUNER
8
G
H