Daewoo DSC-3220E/3220L service manual SC-150

Page 68

I810

controlled rectifier

CONDUCTING

Service manual

16

T801 SM PS TRANS

D821

HIGH

D825

R810

C840

C841AROUND 6Vdc

1 I823 3.3V	3
REGULATOR

AROUND 3.3Vdc

R713

SC-150

2

4			8
4

I810

CONTROLLED

RECTIFIER

-67-

D801...D804

D806

L801

3

C808

4

		SWITCHING		IR IN	64
		SWITCHING		IR IN	64
		CIRCUIT	I501
			I501

				com	61
			MAIN	com
1				supply	56
1				supply	56

voltage

I703 IR

2 RECEIVER 1

GRAETZ BRIDGE

SW801

POWER SWITCH

MAIN AC VOLTAGE

D R A I N

I801

MOFSET AND OCPFB 1

CONTROL IC

C850

R806

3

R870

I804D811

OPTO 2

COUPLER

CONDUCTING

Q811

CONDUCTING

Q810

IC 54

FRONT

K E Y I N 7 M A SK

BUTTONS

POWER

63

LOW

HIGH

R888

Q809 LOW					C888

Fig : Power supply operation in stand - by mode

Image 68

Contents

Chassis SC-150 Contents General description Main PCB Union PCB Main Features Power consumptionSound Output Power Tuning systemSvhs Pin Signal Description Matching value Page C01 C02C03 C04639.25 S10 S11S12 S13Program Group Skip Special case Country selection = OthersITV Safety instruction RAY Radiation PrecautionOrder Default settingh for SC-150 Alignment instructionsParabola HOR WidthOption HOR Paral BOW HOR Width Corner EW Trapez IC description VCTPage Page Pin Name Type Short Description IC version VCT 3832A VCT 3834AChassis IC marking OSD languages Atss countries Text Gndaf Supply AGC Page DSP-Section Audio Baseband Processing Analogue SectionNicam plus FM/AM-Mono German 2-Carrier System Dual FM SystemPAL SECAM-LUssr AdrselResetq DvsupDvss VREF2Features ANAIN1Testen XtalinPin Symbol Function OUT1 GND1OUT1+ ModeTDA8946J Page GND Block diagram TDA6107Q SDA SCLPage Pin Name Symbol Description VIN OVPIIN H TJ TSDDescription IC Pins Symbol Rating Unit I2C Decoder SW1 SW0SW2 SW3IN3 OUTIN1 IN2VEE Circuit description If section Block diagram Vision if Amplifier Standard Features FPLL, VCO and AFCPage Page Adaptive Comb Filter VCT3834A only Video Sync Processing CRT Measurement and Control Page Configuration Stand byDescription Application Forced KEY Page ESC Quadrature MixersPage Page Power supply primary part operations STR-F6654 general descriptionPage STR-F6654 oscillating operation Overcurrent protection function OCP Latch circuitThermal shutdown circuit TSD Overvoltage protection circuit OVP TV start-up operations TV normal run and stand-by mode operations Page FBT SC-150 Controlled Rectifier 6V DC High Service Parts List Cord Power Oxide Film 2W 1.2 OHM J Small Semi Fixed CCZB1H561K Cera Carbon Film Metal Film Carbon Comp PA01A RF27 RD-4Z221J Different Part List by PCB & Micom Version Main PCB Union PCBJumper DEL JumperExplode View PCB Main PCB Union Schematic DiagramMAIN Schematic DiagramUNION