Daewoo CHASSIS : SC-150 Model : DSC-3220E Service Manual
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Daewoo CHASSIS : SC-150 Model : DSC-3220E Service Manual

Chassis : sc-150
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S/M No. : DSC150BEF0
Service Manual
Color Television
CHASSIS : SC-150
Model : DSC-3220E/3220L
DAEWOO ELECTRONICS Corp.
http : //svc.dwe.co.kr
DEC . 2002

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Summary of Contents for Daewoo CHASSIS : SC-150 Model : DSC-3220E

  • Page 1 S/M No. : DSC150BEF0 Service Manual Color Television CHASSIS : SC-150 Model : DSC-3220E/3220L DAEWOO ELECTRONICS Corp. http : //svc.dwe.co.kr DEC . 2002...

  • Page 2: Table Of Contents

    Service manual SC-150 Contents 1 - Main features ................................ 4 1-1 Specifications ..............................4 1-2 Channel table ..............................8 1-3 ATSS sorting method ............................11 2 - Safety instruction ..............................13 3 - Alignment instructions ............................14 3-1 Microcontroller configuration : Service mode ....................14 3-2 Service mode navigation ..........................
  • Page 3 Service manual SC-150 4-5-2 TDA8358J .............................. 33 4-6 TDA6107Q ................................33 4-7 24C16 - 16 Kb EEPROM ............................ 35 4-8 STR - F6653 ............................... 36 4-8-1 General description ..........................36 4-8-2 Features ..............................36 4-8-3 Block diagram ............................36 4-8-4 Pin description ............................37 4-8-5 Control part - electrical characteristics ....................
  • Page 4 Service manual SC-150 5-3-17 Analogue RGB Insertion ........................50 5-3-18 Fast-Blank Monitor ..........................50 5-3-19 Vertical and East/West Deflection ....................... 50 5-3-20 EHT Compensation ..........................51 5-3-21 Reset Function ............................51 5-3-22 Standby and Power-On ........................51 5-4 Micro-controller .......................

  • Page 5: Main Features

    Service manual SC-150 1- Main Features 1-1 Specifications TV standard PAL - SECAM B/G D/K, PAL I/I, SECAM L/L' Sound system NICAM B/G, I, D/K, L, FM 2Carrier B/G, D/K Power consumption 32" 16:9 Real Flat : 110W approx. Sound Output P o w er 7W x2 (at 1KHz, 60% mod, 10% THD) 10W(Normal) 8 ohm X 2 Speaker...
  • Page 6 Service manual SC-150 Specification matrix Chassis Name SC-150 Model Name DSC-3220E DSC-3220L 3834 VCT Version Software Version Remote Control R46G22 PCB Serial Number 4859812224(MAIN)/ 4959812324(Union) Tube 16:9 Real Flat SVHS 3 "Picture Improvements, Comb Filter, Horizontal Scaler" Teletext Split Screen Auto / 4:3 / 14:9 / Zoom 14:9 /Zoom Formats Available in Video Mode 16:9 / Full Screen...

  • Page 7: Service Manual Sc

    Service manual SC-150 21 Pin EURO-SCART 1 : Signal Description Matching value Audio Output Right 0.5 Vrms, Impedance < 1 , ( RF 54% Mod ) Audio Input Right 0.5 Vrms, Impedance > 10 Audio Output Left 0.5 Vrms, Impedance < 1 , ( RF 54% Mod ) Audio Earth Blue Earth Audio Input Left...
  • Page 8 Service manual SC-150 Video Output 1 Vpp 3dB, Impedance 75 ( Monitor output ) - Not available for cp885 Video Input, Y In. 1 Vpp 3dB, Impedance 75 Common Earth...

  • Page 9: Channel Table

    Service manual SC-150 1-2 Channel table FREQUENCY TABLE EUROPE CCIR FRANCE GB(IRELAND) EAST OIRT 46.25 47.75 49.75 48.25 55.75 (L’) 53.75 59.25 55.25 60.5 (L’) 61.75 77.25 62.25 63.75 (L’) 175.25 85.25 175.25 176.00 183.25 93.25 182.25 184.00 191.25 175.25 189.25 192.00 199.25...
  • Page 10 Service manual SC-150 EUROPE CCIR FRANCE GB(IRELAND) EAST OIRT 639.25 639.25 639.25 639.25 647.25 647.25 647.25 647.25 655.25 655.25 655.25 655.25 663.25 663.25 663.25 663.25 671.25 671.25 671.25 671.25 679.25 679.25 679.25 679.25 687.25 687.25 687.25 687.25 695.25 695.25 695.25 695.25 703.25 703.25...
  • Page 11 Service manual SC-150 EUROPE CCIR FRANCE GB(IRELAND) EAST OIRT 168.25 212.75 168.25 231.25 224.75 231.25 238.25 236.75 238.25 245.25 248.75 255.25 245.25 252.25 260.75 263.25 252.25 259.25 272.75 271.25 259.25 266.25 284.75 279.25 266.25 273.25 296.75 287.25 273.25 280.25 136.00 295.25 280.25 287.25...

  • Page 12: Atss Sorting Method

    Service manual SC-150 1-3 A TSS sorting method The TV set sweeps all the TV bands from beginning of VHF to end of UHF. The TV controlling softw are for each program checks if a VPS CNI code is transmitted ( this system e xists for German, Swiss and Austrian transmissions). If no VPS CNI code is found , then the system check if a CNI code is transmitted as part of the teletext transmission ( Packet 8/30 format 1 ).
  • Page 13 Service manual SC-150 The sor ting order within group II, III, and IV is based on the channel frequency. The Pro gram with the lo west frequency is allocated the first rank in its group, and so f orth until the last program of the group which has the highest fr equency.

  • Page 14: Safety Instruction

    Service manual SC-150 2 - Safety instruction WARNING: Only competent service personnel may carry out work involving the testing or repair of this equipment. X-RAY RADIATION PRECAUTION 1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid such hazards, the high voltage must not exceed the specified limit.

  • Page 15: Alignment Instructions

    Service manual SC-150 3 - Alignment instructions 3-1 Microcontroller con figuration : Service mode To switch the TV set into service mode please see instruction below. 1 - Select pr. number 91 2 - Adjust sharpness to minimum and exit all menu. 3 - Quickly press the key sequence : RED - GREEN - menu To software version is displayed beside the word Service, e.g.

  • Page 16: Microcontroller Configuration : Option

    PANORAMA 01=ALPS FASTEXT TOP text 10=Philips (AGC intern) TUBE 16:9 AUTO 4:3 SVHS3 (FLOF) on switch to 4:3 enable 11=DAEWOO OPTION 2 Normal I PICTURE brightness TILT on See table below. Normal I OPTION 2 bits B2 B1 B0 PICTURE...

  • Page 17: Horizontal Picture Centring

    Service manual SC-150 3-4-6- Horizontal picture centring Adjust HOR CEN(Horizontal center) to have the picture in the center of the screen. 3-4-7- Eau/West comection Adjust the PARABOLA, HOR WIDTH, CORNER, HOR PARAL, EW TRAPEZ , H BOW, to compensate for geometrical distorrin, HOR PARAL H BOW...

  • Page 18: Agc

    Service manual SC-150 CORNER EW TRAPEZ 3-4-8- AGC - Adjust the antenna signal level at 70 dB V 2 - Tune a colour bar pattern. - Find the “ A GC” item in service mode. - Adjust AGC volume ( RB10 ) to bring the cursor to central position : 32. -17-...

  • Page 19: Ic Description

    Service manual SC-150 4 - IC description 4-1 VCT383XA TV signal processor - Teletext decoder with embedded 8 bit - Controller. 4-1-1- Block diagram of the VCT VCT 38xx Display RGBOUT Processor Video Video Comb Color Panorama Front-end Filter Decoder Scaler Back-end Pict.

  • Page 20: Controller

    Service manual SC-150 Horizontal scaling ( 0.25 to 4 ) Panoramavision Black-level expander Dynamic peaking Soft limiter (gamma cor r ection) Colour transient improvement Programmable RGB matrix Analogu e RGB/Fastblank input Half-contrast switch Picture frame generator Scan velocity modulation output High-performance H/V deflection Angle and bow correction Separate ADC for tube measurements...

  • Page 21: Displaty Osd Features

    Service manual SC-150 High-level command language FLOF (Fastext), and TOP support 10 pages memory on chip (10kB) 4-1-5- Display OSD Features 3kB OSD RAM on chip WST level 1.5 compliant WST level 2 parallel attributes 32 foreground/background colours programmable colour look-up table 1024 mask programmable characters 17 national languages (Latin, Cyrillic and Greek caracter sets)

  • Page 22: Tv Processor Version And -Controller Capacity

    Service manual SC-150 • Inventory of transmitted Teletext pages stored in the Page Table Signal quality detector for WST data Comprehensive Teletext language coverage Full Field Vertical Blanking Interval (VBI) data capture of WST data 4-1-10- TV processor version and -Controller capacity IC version VCT 3832A VCT 3834A...
  • Page 23 Service manual SC-150 PSDIP Pin Name Type Short Description 64-pin GNDAF SUPPLY Ground, Analog Front-end VSUPAF SUPPLY Supply Voltage, Analog Front-end CBIN Analog Component Cb Input CIN1 Analog Chroma 1 Input CIN2/CRIN Analog Chroma 2 Input / Analog Component Cr Input VIN1 Analog Video 1 Input VIN2...
  • Page 24 Service manual SC-150 Power S/B 5V MUTE MOD SW SECAM L AFC/RES RESET XTAL in SC1 SW OSC GND SC2 SW Vout S/B 3.3V SGND Cb in C in XREF Cr in IF-IN SC1-IN SC2-IN B out RCA VIN G out TEST R out H out...

  • Page 25: Msp341X Multistandard Sound Processor

    Service manual SC-150 4-2 MSP341x Multistandard Sound Processor The MSP 341x is designed as a single-chip Multistandard Sound Processor for applications in analogue and digital TV sets, video recorders, and PC cards. The MSP3411 has all functions of MSP3410 with the addition of a virtual surround sound feature. A Surround sound affect can be r produced with two loudspeakers.
  • Page 26 Service manual SC-150 - high deviation FM-mono mode (max. deviation: approx. 360 kHz) 4-2-1-2 DSP-Section (Audio Baseband Processing) - flexible selection of audio sources to be processed - performance of terrestrial de-emphasise systems (FM, NICAM) - digitally performed FM-identification decoding and de-matrixing - digital baseband processing: volume, bass, treble - simple controlling of volume, bass, treble 4-2-1-3 Analogue Section...
  • Page 27 Service manual SC-150 TV standards Position of sound Sound modulation Color system Country system carrier (MHz) 5.5 / 5.7421875 FM Stereo Germany 5.5 / 5.85 FM-Mono / NICAM Scandinavia, Spain 6.5 / 5.85 AM-Mono / NICAM SECAM-L France 6.0 / 6.552 FM-Mono / NICAM 6.5 / 6.2578125 D/K1 FM Stereo...
  • Page 28 Service manual SC-150 Pin No. Pin Name Type Short description In / Out Test pin Test pin Not Connected Test pin Test pin Test pin DVSUP Digital power supply +5V DVSS Digital Ground Not Connected Not Connected Not Connected Not Connected RESETQ Power-On-reset Not Connected...

  • Page 29: Tda 4470-Multistandard Video-If And Quasi Parallel Sound Processor

    Service manual SC-150 Pin No. Pin Name Type Short description ANA_IN1- IF common Not Connected TESTEN Test pin XTAL_IN Crystal oscillator XTAL_OUT Crystal oscillator Test pin 4-3 TDA 4470-Multistandard Video-IF and Quasi Parallel Sound Processor 4-3-1- Description The TDA 4470 is an integrated bipolar circuit for multi-standard video/sound IF (VIF/SIF) signal processing in TV/VCR and multimedia applications.

  • Page 30: Block Diagram

    Service manual SC-150 Symbol Function AFC switch 20, 21 VCO circuit AFC output Supply voltage Intercarrier output O, FM AF output-AM sound O, AM Offset compensation COMP 27, 28 SIF2 input (symmetrical) i,SIF2 4-3-4 Block diagram l' switch Loop Offset filter comp.

  • Page 31: Tda894Xj Stereo Audio Amplifier

    Service manual SC-150 4-4 TDA8946J Stereo Audio Amplif i er The TDA8946J is a dual-channel audio p o wer amplifier with an output power of 2 X 15W at an 8 load and a 18V supply. The circuit contains two Bridges Tied Load(BTL) amplif i ers with an all-NPN output stage and standby/mute logic.
  • Page 32 Service manual SC-150 Vcc1 Vcc2 OUT1- Vcc1 OUT1- IN1- OUT1+ IN1+ n.c. OUT1+ IN1+ n.c. TDA8946J IN1- OUT2- IN2- TDA8946J IN2- MODE IN2+ OUT2+ IN2+ STANDBY/ MODE n.c. MUTE LOGIC SHORT CIRCUIT OUT2- TEMPERATURE GND2 PROTECTION Vcc2 OUT2+ MBK933 GND1 GND2 4-5 TDA8358J Vertical Amplifier The TDA8358J are power circuit for use in 90...

  • Page 33: Tda835Xj Vertical Amplifier

    Service manual SC-150 4-5-1 TDA8358J An East-West output stage is provided that is able to sink current from the diode modulator circuit. Features : - Few external components - Highly efficient fully DC-coupled vertical output bridge circuit - Short rise and fall time of the vertical flyback switch - Guard circuit - Temperature (thermal) protection - High EMC because of common mode inputs...

  • Page 34: Features

    Service manual SC-150 4-6 TDA6107Q The TDA6107Q includes three video output amplifiers in one plastic DIL-Bent-SIL 9-pin medium power package, using high voltage DMOS technology, and is intended to drive the three cathodes of a colour CRT directly. To obtain maximum performance, the amplifier should be used with black-current control.
  • Page 35 Service manual SC-150 -34-...

  • Page 36: 24C16 - 16 Kb Eeprom

    Service manual SC-150 4-7 24C16 - 16 Kb EEPROM features : - 16 Kbit serial I2C bus EEPROM - Single supply voltage : 4.5 V to 5.5 V - 1 Million Erase/Write cycles (minimum) - 40 year data retention (minimum) Pin description Pin No.

  • Page 37: Str - F6653

    Service manual SC-150 4-8 STR - F6653 4-8-1 General description The STR-F6653 is an hybrid IC with a build-in MOSFET and control IC, designed for flyback converter type switch mode power supply applications. 4-8-2 Features - Small SIP fully isolated molded 5 pins package - Many protection functions : * Pulse-by-pulse overcurrent protection (OCP) * Overvoltage protection with latch mode (OVP)

  • Page 38: Pin Description

    Service manual SC-150 4-8-4 Pins description name symbol description Overcurrent / feedback O.C.P./ F.B. Input of over current detection signal and feedback signal Source MOSFET source Drain MOSFET drain Supply Input of power supply for control circuit Ground Ground 4-8-5 Control part electrical characteristics IC PIN RATING SYMBOL...

  • Page 39: Mosfet Electrical Characteristics

    Service manual SC-150 4-8-6 MOSFET electrical characteristics IC PINS RATING DESCRIPTION SYMBOL UNIT NUMBER MIN. TYPE Drain-to-source break voltage Drain leakage current On-resistance (on) 1.95 Switching time noec Thermal resistance 0.95 -38-...

  • Page 40: Cxa1315P

    Service manual SC-150 4-9 CXA1315P 4-9-1 General description The CXA1315M/P is developed as a 5-channel 8- bit D/A converter supporting with I 2 C bus. 4-9-2 Features -Serial control through I C bus -5-channel 8-bit D/A converter -Built-in 4general-purpose I/O ports (Digital I/O) -I/O can be specified to respective ports independently -Selection of 8 slave addresses possible through address select pins (3 pins) 4-9-3 Block diagram...

  • Page 41: Pin Description

    Service manual SC-150 4-9-4 Pin Description Symbol Description I/O pin for general purpose I/O port VILmax: 1.5V VIHmin: 3V VOLmax: 0.4V DAC4 DSC3 D/A converter output pin DAC2 DAC1 DAC0 GND pin Slave address input pin SDA0 Input at positive logic SDA1 VILmax: 1.5V SDA2...

  • Page 42: General Description

    Service manual SC-150 4-10 MM1118 4-10-1 General description This is a 3-input, 1-output video switch IC with a clamp function and built-in 6dB amp, for video signal switching. One of the inputs also has a mute function. 4-10-2 Features -Built-in 6dB amp -Clamp function -Mute function -Current consumption: 5.1mA typ.

  • Page 43: La6515

    Service manual SC-150 4-11 LA6515 4-11-1 General description The LA6515 features an on-chip current limiter and provides high voltage gain and a high common-mode rejection ratio. The LA6515 is an ideal choice for power applications such as DC servos, capstan drivers, actuator drivers, programmable power supplies and high-quality audio amplifiers.

  • Page 44: Circuit Description

    Service manual SC-150 5 - Circuit description 5-1 Block diagram -43-...

  • Page 45: If Section

    Service manual SC-150 5-2 IF section 5-2-1 Block diagram 5-2-2 Vision IF Amplifier The video IF signal (VIF) is fed through a SAW filter to the differential input (Pin 6-7) of the VIF amplifier. This amplifier consists of three AC-coupled amplifier stages. Each differential amplifier is gain controlled by the automatic gain control circuit (VIF-AGC).

  • Page 46: Tuner-And Vif-Acg

    Service manual SC-150 SAW filters Ref. Standard Features K3953M B/G - D/K - I - L/L’ - IF filter for video application - TV IF filter with Nyquist slopes at 33.9 MHz and 38.9 MHz - Constant group delay K9650M B/G - D/K - I - L/L’...

  • Page 47: Video Demodulation And Amplifier

    Service manual SC-150 5-2-5 Video Demodulation and Amplifier The video IF signal, which is applied from the gain controlled IF amplifier, is multiplied with the in-phase component of the VCO signal. The video demodulator is designed for low distortion and large bandwidth. The demodulator output signal passes an integrated low pass filter for attenuation of the residual vision carrier and is fed to the video amplifier.

  • Page 48: Video - Vct Description

    Service manual SC-150 5-3 Video - VCT description 5-3-1 Introduction The VCT 38xxA includes complete video, display, and deflection processing. All processing is done digitally, the video front-end and video back-end are interfacing to the analogue world. Most functions can be controlled by software via I 2 C bus slave interface. 5-3-2 Video Front-end This block provides the analogue interfaces to all video inputs and mainly carries out analogue-to-digital conversion for the following digital video processing.

  • Page 49: Adaptive Comb Filter (Vct3834A Only)

    Service manual SC-150 5-3-8 Adaptive Comb Filter (VCT3834A only) The adaptive comb filter is used for high-quality luminance/chrominance separation for PAL or NTSC signals. The comb filter improves the luminance resolution (bandwidth) and reduces interferences like cross-luminance and cross-color artefacts. The adaptive algorithm can eliminate most of the mentioned errors without introducing new artefacts or noise.

  • Page 50: Video Sync Processing

    Service manual SC-150 5-3-11 Video Sync Processing To extract the sync information from the video signal, a linear phase low-pass filter eliminates all noise and video contents above 1 MHz. The sync is separated by a slicer; the sync phase is measured. A variable window can be selected to improve the noise immunity of the slicer.

  • Page 51: Crt Measurement And Control

    Service manual SC-150 5-3-15 CRT Measurement and Control The display processor is equipped with an 8-bit ADC for all measuring purposes. The ADC is connected to the SENSE input pin. Cutoff and white-drive current measurement are carried out during the vertical blanking interval. 5-3-16 Average Beam Current Limiter The average beam current limiter (BCL) uses the SENSE input for the beam current measurement.

  • Page 52: Eht Compensation

    Service manual SC-150 5-3-20 EHT Compensation The vertical waveform can be scaled according to the average beam current. This is used to compensate the effects of electric high-tension changes due to beam current variations. EHT compensation for East/West deflection is done with an offset corresponding to the average beam current.

  • Page 53: Controller I/O Pin Configuration And Function

    Service manual SC-150 5-4-3 - Controller I/O pin configuration and function There exist different kinds of ports. The universal ports serve as digital I/O and have additional special input and output functions. A subset of the universal ports serves as input for the analogue-to-digital converter. - Controller I/O pin configuration and function table configuration name...
  • Page 54 Service manual SC-150 23, in each frame. This is bi-phase encoded using a clock frequency of 5 MHz. In total, 14 data bits are available, in 4 groups. Group 1 contains the codes for the received format. The mode chosen is defined by the following table. In effect the default mode is full screen. The table below gives a summary of the FORMAT modes available (for WP895 and WP895F), and their given properties.

  • Page 55: External Source Control Logic

    Service manual SC-150 5-4-6 EXTERNAL source control logic The following schematic, illustrates the logic of control for the two SCART connectors. FORCED FORCED AV 1 AUTO FORCED S-VHS3 S/SW 1 HIGH DISABLE F/SW 1 OPTION AUTO WP895 AV 1 FORCED AUTO AV 2 S/SW 1...

  • Page 56: Over Current Protection

    Service manual SC-150 can always be overridden by the user after the event. Each line on the diagram, with its associated text, represents the exact conditions under which the change of state will occur. Sometimes this will be accompanied by another action which will be automatically performed by the television, being to either ENABLE or DISABLE F/SW 1.

  • Page 57: Sound Processing

    Service manual SC-150 OSD Language C Teletext Language Mapping Teletext Language English English Latin English, French, German German Latin German, Italian, Swedish/Finnish Swedish/Finnish Latin Spanish, Dutch, Italian Italian Latin Danish, Finnish, French French Latin Norwegian, Spanish Spanish Latin Swedish, Greek Turkish Turkish Latin...

  • Page 58: Nicam Decoder

    Service manual SC-150 5-6-4 NICAM decoder In case of NICAM - mode, the phase samples are decoded according the DQPSK - coding scheme. The output of this block contains the original NICAM bitstream. 5-6-5 DSP section All audio baseband functions are performed by digital signal processing (DSP). The DSP section controls the source and output selection, and the signals processing.

  • Page 59: Mode Selection

    Service manual SC-150 5-7-2 Mode selection The TDA894xJ has several functional modes, which can be selected by applying the proper DC voltage to pin MODE. Mute : In this mode the amplifier is DC biased but not operational (no audio output). This allows the input coupling capacitors to be charged to avoid pop-noise.

  • Page 60: P Ower Supply (Str F6653)

    Service manual SC-150 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.
  • Page 61 Service manual SC-150 When the power switch is pushed on, V increases slowly. During this time, C806 is charged through R802. As soon as V reaches 16V, the STR-F6654 control circuit starts operating. Then, V is obtained by smoothing the winding voltage which appears between pin6 and pin7 of the SMPS transformer.
  • Page 62 Service manual SC-150 5-9-2-2 STR-F6654 oscillating operation -61-...
  • Page 63 Service manual SC-150 When the MOSFET is ON, the STR-F6654 internal capacitor C1 is charged at the constant voltage 6.5V. At the same time, the voltage at pin 1 (OCP / FB) increases with the same waveform as the MOSFET drain current. When the pin 1 voltage reaches the threshold voltage V = 0.73V, the STR-F6654 internal comparator 1 starts operating.

  • Page 64: 5-10Tv Start-Up, Tv Normal Run And Stand By Mode Operations

    Service manual SC-150 5-10 TV start-up, TV normal run and stand by mode operations 5-10-1 TV start-up operations * Schematic diagram for start-up operations * TV start-up and microcontroller initialisation - When SW801 power switch is pushed, main AC voltage is applied to T801 transformer (after rectification by D801... D804 diodes).

  • Page 65: Tv Normal Run And Stand-By Mode Operations

    Service manual SC-150 . If the TV set was on normal run mode before switching off, the microcontroller delivers horizontal drive voltage at pin 24 and picture appears on screen. . If the TV set was on stand-by mode before switching off, the microcontroller switches TV set to stand-by mode, decreasing power pin voltage (pin 1).
  • Page 66 Service manual SC-150 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...
  • Page 67 Service manual SC-150 * power supply functioning during TV set normal run mode - I801 transmits controlled pulses to T801 which generates DC voltages after rectifications by secondary part diodes and electro capacitors (by example by D820 and C813 on 143V supply voltage line). - 8V, 5V, 3.3V supply voltage lines have stabilized voltages obtained by I820, I822, I823 voltage regulators.
  • Page 68 Service manual SC-150 -67-...
  • Page 69 Service manual SC-150 * TV set stand-by mode operations - On stand-by mode, I501 microcontroller pin 1 (power) is set to low. - So, Q809 collector is set to high. - Then, I810 controlled rectifier gate pin is set to high and I810 is conducting. - So, current flows from pin 16 SMPS transformer to the ground via I804 optocoupler and Q810 and Q811 transistors (which are conducting).

  • Page 70: Service Parts List

    Service manual SC-150 6-1. Service Parts List z_loc z_parts_code parts_name parts_descr z_loc z_parts_code parts_name parts_descr ZZ100 48B4846G22 TRANSMITTER REMOCON R-46G22 (AAA) C890 CCYE3D103P C CERA 2KV E 0.01MF P ZZ110 PEPKCPD037 PACKING AS DSC-3220E D403 DDGP30L—- DIODE DGP30L M641 6520010100 STAPLE PIN AUTO W65 D404...
  • Page 71 Service manual SC-150 z_loc z_parts_code parts_name parts_descr z_loc z_parts_code parts_name parts_descr M222 4859906111 CORD POWER M5206+H03VVH2-F=2250 E018 4856310300 EYE LET BSR T0.2 (R1.6) M222T 4857417700 TERM CLAMP PT-01-T3 E019 4856310300 EYE LET BSR T0.2 (R1.6) Q401 T2SD1880— 2SD1880 E020 4856310300 EYE LET BSR T0.2 (R1.6) Q401A...
  • Page 72 Service manual SC-150 z_loc z_parts_code parts_name parts_descr z_loc z_parts_code parts_name parts_descr R850 RS02Z129JS R M-OXIDE FILM 2W 1.2 OHM J SMALL C623 CEXF1H109V C ELECTRO 50V RSS 1MF (5X11) TP R890 RS02Z683J- R M-OXIDE FILM 2W 68K OHM J (TAPPING) C624 CEXF1H109V C ELECTRO...
  • Page 73 Service manual SC-150 z_loc z_parts_code parts_name parts_descr z_loc z_parts_code parts_name parts_descr Q334 TKTC3198Y- KTC3198Y C526 CBZF1H104Z C CERA SEMI 50V F 0.1MF Z Q402 T2SD1207T- 2SD1207-T (TAPPING) C528 CCZF1H223Z C CERA 50V F 0.022MF Z Q510 TKTC3198Y- KTC3198Y C529 CCZF1H223Z C CERA 50V F 0.022MF Z Q511...
  • Page 74 Service manual SC-150 z_loc z_parts_code parts_name parts_descr z_loc z_parts_code parts_name parts_descr CA18 CCZB1H102K C CERA 50V B 1000PF K (AXIAL) D840 D1N4148—- DIODE 1N4148 (TAPPING) CA30 CCZF1H103Z C CERA 50V F 0.01MF Z D841 D1N4148—- DIODE 1N4148 (TAPPING) CA31 CCZF1H103Z C CERA 50V F 0.01MF Z D850...
  • Page 75 Service manual SC-150 z_loc z_parts_code parts_name parts_descr z_loc z_parts_code parts_name parts_descr J137 RD-AZ471J- R CARBON FILM 1/6 470 OHM J J191 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J138 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J192 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING J139 85801065GY...
  • Page 76 Service manual SC-150 z_loc z_parts_code parts_name parts_descr z_loc z_parts_code parts_name parts_descr R160 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R543 RD-AZ241J- R CARBON FILM 1/6 240 OHM J R161 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R544 RD-AZ202J- R CARBON FILM 1/6 2K OHM J R162...
  • Page 77 Service manual SC-150 z_loc z_parts_code parts_name parts_descr z_loc z_parts_code parts_name parts_descr R621 RD-AZ102J- R CARBON FILM 1/6 1K OHM J RA12 RD-AZ750J- R CARBON FILM 1/6 75 OHM J R622 RD-AZ102J- R CARBON FILM 1/6 1K OHM J RA13 RD-AZ113J- R CARBON FILM 1/6 11K OHM J R624...
  • Page 78 Service manual SC-150 z_loc z_parts_code parts_name parts_descr z_loc z_parts_code parts_name parts_descr PA01A 4850709N04 CONNECTOR YH025-09+YBNH250+USW=400 CZ02 CCZB1H561K C CERA 50V B 560PF K PF01 4850707S02 CONNECTOR YH025-07+YST025+ULW=400 D911 D1N4004S— DIODE 1N4004S PF02 4859238620 CONN WAFER YPW500-02 D912 D1N4004S— DIODE 1N4004S PF02A 4850702N06 CONNECTOR...
  • Page 79 Service manual SC-150 z_loc z_parts_code parts_name parts_descr z_loc z_parts_code parts_name parts_descr RF27 RD-4Z221J- R CARBON FILM 1/4 220 OHM J RT06 RD-AZ683J- R CARBON FILM 1/6 68K OHM J RT01 RD-2Z100J- R CARBON FILM 1/2 10 OHM J RT07 RD-AZ563J- R CARBON FILM 1/6 56K OHM J RT02...

  • Page 80: Service Part List Option

    Service manual SC-150 6-2. Service Parts List option * THE DIFFERENT PART LIST BY PCB & MICOM VERSION MAIN PCB MICOM/PCB Ver. 4959812224-00 4959812224-01 DW3834-C4-AE2 DW3834-C4-AE2 New Micom(V0.24) RB02 P502 P503 UNION PCB MICOM/PCB Ver. 4959812324-00 4959812324-01 DW3834-C4-AE2 DW3834-C4-AE2 New Micom(V0.25) IT01 JUMPER JT02...

  • Page 81: Exploded View

    Designed by Checked by Inspected by Approved by UNITS PART NAME CHO S.J EXPLODED VIEW SCALE ( 1 / ) 2002. 9. 19 MODEL DSC-3220E Daewoo Electronics CO.,LTD. 49500038 Mechanical Design Team, TV Research Center REFERENCE A0(1189mm X 841mm) -80-...

  • Page 82: Pcb Layout

    Service manual SC-150 8-1. PCB MAIN -81-...

  • Page 83: Union Pcb

    Service manual SC-150 8-2. PCB UNION -82-...
  • Page 84 Service manual SC-150 9-1. Schematic Diagram(MAIN -83-...
  • Page 85 Service manual SC-150 9-2. Schematic Diagram(UNION) -84-...

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