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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-EH67EC/EP/EE,EH675EG Power Supply Block Diagram (1/2)