Daewoo WP-895F, CP-885F service manual

Page 64

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

On normal run mode, I501 microcontroller pin 1 (power) is set to high

•So, I810 controlled rectifier is not conducting

-Q809 is conducting. So, Q808 is not conducting and Q807 is conducting

-So, Q807 collector is connected to the ground and I810 controlled rectifier gate pin is set to low (no conducting)

•So, current from 14V DC voltage (from T801 SMPS transformer pin 13) does not flow through Q811 and Q810 transistors but flows through I806 IC error amplifier

-Q809 is conducting. So, Q810 is not conducting and no current flows from Q810 collector to the ground Therefore, the power circuit diagram is the following one :

*power supply circuit diagram during TV set normal run

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Contents

Colour Television Contents Circuit description PCB Layout Circuit Diagram Main Features Power consumptionSound Output Power Tuning systemSpecification matrix Pin Signal Description Matching value Page C01 C02C03 C04C42 S10 S11S12 S13Program Group Skip Special case Country selection = OthersITV Safety instruction RAY Radiation PrecautionOrder Default settingh for wp Alignment instructionsParabola 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 DSP-Section Audio Baseband Processing Analogue SectionNicam plus FM/AM-Mono German 2-Carrier System Dual FM SystemPAL SECAM-LUssr AdrselDvsup Features ANAIN1Testen XtalinPin Symbol Function OUT1 GND1OUT1+ 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 Overcurrent protection function OCP Latch circuitThermal shutdown circuit TSD 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