Daewoo CP-885, WP-895F STR-F6654 general description, Power supply primary part operations

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Service manual WP 895/895F, CP885/885F

5-9 Power supply (STR F6654)

5-9-1 STR-F6654 general description

The STR-F6654 is an hybrid IC with a build-in MOSFET and control IC, designed for flyback converter type switch mode power supply applications.

5-9-2 Power supply primary part operations

An oscillator generates pulses signals which turn on and off a MOSFET transistor.

5-9-2-1 Start-up circuit : VIN

The start-up circuit is used to start and stop the operation of the control IC, by detecting a voltage appearing at VIN pin (pin 4).

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Contents

Colour Television Contents Circuit description PCB Layout Circuit Diagram Sound Output Power Main FeaturesPower consumption Tuning systemSpecification matrix Pin Signal Description Matching value Page C03 C01C02 C04C42 S12 S10S11 S13Program Group Skip Special case Country selection = OthersITV Safety instruction RAY Radiation PrecautionParabola Order Default settingh for wpAlignment instructions HOR WidthDisable HOR Paral BOW Corner EW Trapez IC description Page Page Chassis IC marking OSD languages Atss countries Text IC version VCT 3832APin Name Type Short Description Gndaf Supply VCT Page Nicam plus FM/AM-Mono DSP-Section Audio Baseband ProcessingAnalogue Section German 2-Carrier System Dual FM SystemUssr PALSECAM-L AdrselDvsup Testen FeaturesANAIN1 XtalinPin Symbol Function OUT1+ OUT1GND1 ModeBlock diagram TDA8944J GND Page Page Inverting input Block diagram TDA6107Q SDA SCLPage Description IC PIN Symbol Rating Unit MIN OCH -FCircuit description If section Block diagram Vision if Amplifier Standard Features Page Page Adaptive Comb Filter VCT3834A only Video Sync Processing CRT Measurement and Control Page Configuration Stand byDescription Application Page Page ESC Quadrature MixersPage Page Power supply primary part operations STR-F6654 general descriptionPage STR-F6654 oscillating operation Thermal shutdown circuit TSD Overcurrent protection function OCPLatch circuit Overvoltage protection circuit OVPTV start-up operations TV normal run and stand-by mode operations Page FBT CP885/885F N T R O L L E D Rectifier 6V DC High Service Parts List Spark GAP CBXF1H104Z Cera Semi 50V F 0.1MF Z Tapping CZSL1H220J Cera 50V SL 22PF J Axial CCZB1H222K Cera Coil Peaking Wire Copper Carbon Comp Exploded View Exploded View DTF-29U8 DTP-28A7 Service Man ual WP-895/895F, CP885/885F DTP-28G7 DTP-28G8 Printed Circuit Board Page Page 686, AHYEON-DONG MAPO-GU SEOUL, Korea