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POWER P.C.B.
MAIN P.C.B.
D1400 T1150 POWER SWITCHING TRANSFORMER
X SW+3V
P1102 P1501 12,13
X SW+3V
A
VA1110,L1120,L1121 AC INLET P1101
D1140,C1143
D1270 1 2
X SW+3.8V P1102 15 P1501 X SW+3.8V B
F1101
SURGE SUPPRESSOR AND SURGE ABSORBER
RECTIFIER 12 P1 S1A 1
3
X SW+5.8V
P1102 P1501 1,2,3
C
S1B
2
TIMER +5V IC7503- 8
IC1150
(SWITCHING IC) S1C VIN 7 2 F/B 9 5 Z/C 1 GND VCC 3 4 2 S3B 5 10 P2 S2 4 1 S FET G D 5 6 7 8 1 Vin Current 8 Sense FET Gate 7 Drive 2 PW ON GND 6 3 Q1600 (REG.X SW+5.8V)
X SW+3.3V
IC7501- 16
Q1502
(X SW+3.3V OUT)
IC1601
(DC/DC CONVERTER)
3
8
V2 4
IC1521
(REG.ANA+3.3V)
7
V1
S3A
6
QR1800,QR1801 SWITCHING
8 VIN VOUT 1 GND CONT 4 5
ANA+3.3V
D
FROM TIMER SECTION
DI P ON H IC7501- 44
E
F T7501 DISPLAY HEATER POWER SWITCHING TRANSFORMER 2 1 7 D7506 UNREG +38V TO U/V TUNER
IP1501 1 2
IP7501 1
X SW+12V
Q1200 (FEED BACK) 4 1
P1102 P1501 9,10,11
IC7401
(REG.PS+11.6V)
1 VIN VOUT 3 H :ON GND 2 5
PS+11.6V
IC3001- 46 ,IC4009- 8 ,IC4012- 8 PWR SAVE H :ON IC7501- 79 FROM TIMER SECTION
3
2 Q1509 (DR+12V OUT) 1 3 2 3 S FET G D 5 6 7 8
DR P ON H IC7501- 42 DR+12V QR7401 ( H :ON)
2 1
G H
IC1200
(ERROR VOLTAGE DET.)
HOT
COLD
4
FROM TIMER SECTION
QR1501 ( H :ON)
DMR-EH57EC/EP/EE,EH575EG Power Supply Block Diagram (1/2)