Color television daewoo dtx-21g2/ dtx-21b4/ dtx-21u7 (59 pages)
Summary of Contents for Daewoo DTK-28
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S/M No.TCP850FEF0 Service Manual CHASSIS : CP-850/F MODEL : DTK-28 DTK-29 Caution : In this Manual, some parts can be changed for improving. their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List)in Service Information Center.
CP-850/F Service Manual 1 MAIN FEATURES 1.1 SPECIFICATIONS 1.1.1 GENERAL TV standard PAL - SECAM B/G D/K, PAL I/I, SECAM L/L Colour system Tuner PAL, SECAM PAL, SECAM, PAL 60, NTSC M, NTSC 4.43 Sound system NICAM B/G, I, D/K, L, FM 2Carrier B/G, D/K Power 29"(4:3) Real Flat :110W approx.
CP-850/F Service Manual 1.3 ATSS SORTING METHOD The TV set sweeps all the TV bands from beginning of VHF to end of UHF. The TV controlling software for each program checks if a VPS CNI code is transmitted (this system exists for German, Swiss and Austrian transmissions). If no VPS CNI code is found, then the system checks if a CNI code is transmitted as part of the teletext transmission ( Packet 8/30 format 1 and format 2).
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CP-850/F Service Manual Note : If two programs with the same name but a different code are found these two programs are listed in group I, II or III . The sorting order within group II, III, and IV is based on the channel frequency. The program with the lowest frequency is allocated the first rank in its group, and so forth until the last program of the group which has the highest frequency.
CP-850/F Service Manual 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. The nominal value of the high voltage of this receiver is 25-26 KV (20”-21”) or 26 KV (25”...
CP-850/F Service Manual 3 ALIGNMENT INSTRUCTIONS 3.1MICROCONTROLLER CONFIGURATION : 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 menus. 3 - Within 2 seconds press the key sequence : RED - GREEN - menu The software version is displayed beside the word Service, e.g.
CP-850/F Service Manual 3.3.1 OPTION 1 3.3.2 OPTION 2 3.3.3 OPTION 3 Beam Current(mA) Tube Nominal 4/3 - Real Flat, 16/9 – Real Flat 1.30 1.45 1.35 1.50 All values modified are immediately memorised in eeprom. 3.4 TV SET ALIGNMENT 3.4.1 LOCAL OSCILLATOR ALIGNMENT Tune a colour bar pattern.
CP-850/F Service Manual 3.4.3 WHITE BALANCE - Select a dark picture and adjust RED BIAS and GRN BIAS to the desired colour temperature. - Select a bright picture and adjust RED, GRN and BLUE GAIN to the desired colour temperature. 3.4.4 FOCUS Adjust the Focus volume ( on FBT ) to have the best resolution on screen.
CP-850/F Service Manual PARABOLA CORNER B & CORNER T EW TRAPEZ 3.4.8 AGC - Make sure option bits are correct for the tuner fitted on the chassis (See above how to change option bits). - Adjust the antenna signal level at 62 dB V± 2 - Tune a colour bar pattern.
CP-850/F Service Manual 4 IC DESCRIPTION 4.1 TELETEXT DECODER WITH EMBEDDED 8-BIT CONTROLLER TVText Pro is a 8-bit controller based on a enhanced 8051 core with embedded teletext, On screen Display and TV controller functions. 4.1.1 BLOCK DIAGRAM OF THE SDA55XX 4 .
CP-850/F Service Manual PSDIP 52-pin Pin Name Type Short Description PROJECT50 n.c. n.c. n.c. Ground (0V) VDD3.3 Input/Output 3.3V n.c. n.c. RESET A low level on this pin resets the device. XTAL2 Output of the inverting oscillator amplifier XTAL1 Input of the inverting oscillator amplifier VSSA Ground for analog components VDDA2.5...
CP-850/F Service Manual 4.2.1 BLOCK DIAGRAM OF THE VSP9405C 4.2.2 DESCRIPTION Integrated Video Matrix switch - Up to seven CVBS inputs, up to two Y/C inputs, - Up to three CVBS outputs (even when Y/C input) - 9 bit amplitude resolution for CVBS, Y/C A/D converter - AGC (Automatic Gain Control) -19-...
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CP-850/F Service Manual Multi-standard colour decoder - PAL/NTSC/SECAM including all substandards - Automatic recognition of chroma standard - Only one crystal necessary for all standards RGB-FBL or YUV-H-V input - 8 bit amplitude resolution for RGB or YUV - 8 bit amplitude resolution for FBL or H ITU656 support - ITU656 output - DS656 output (double-scan ‘656like’...
CP-850/F Service Manual 4.2.3 PINNING Pin Connections and Short Descriptions for VSPB For VSP 941x/4x, the pin connections differ for pins: 1, 2, 3, 75, 76, 77, 78, 79, 80 (see Section 4.2.2. on page 210). Common Pin Connections and Short Descriptions Pin No.
CP-850/F Service Manual 4.3 DDP 3315C - DISPLAY AND DEFLECTION PROCESSOR The DDP 3315C is a mixed-signal single-chip digital display and deflection processor, designed for high-quality backend applications in double scan and HDTV TV sets with 4:3 or 16:9 picture tubes.
CP-850/F Service Manual 4.3.2 DESCRIPTION Video Processing - linear horizontal scaling (0.25 ... 4), as well as nonlinear horizontal scaling “panorama vision” - dynamic black level expander - luma sharpness enhancement by dynamic peaking and luma transient improvement (LTI) - color transient improvement (CTI) - programmable RGB matrix - black stretch, blue stretch, gamma correction via programmable Non-linear Colorspace Enhancer (NCE) on RGB - two analog double scan inputs with fast blank (one RGB and one RGB/YC r C b /YP r P b selectable)
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CP-850/F Service Manual IC architecture A clock generator converts different external line locked clock rates to a common internal sample rate of ~40 MHz, in order to provide a higher horizontal resolution. The input interface accepts ITU-R 601 at 27 or 32 MHz and ITU-R 656 with encoded or external sync at 54 MHz.
CP-850/F Service Manual 4.3.3 PINNING Pin No. Pin Name Description Remarks Picture bus Luma Picture bus Luma (MSB) 656EN Enable 656 input mode LLC2 System clock input Horizontal Sync Input Vertical Sync Input FREQSEL Selection of H-Drive Frequency Range Clock select 1 Clock select 0 Additionnal VSYNC input XTAL2...
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CP-850/F Service Manual Pin No. Pin Name Description Remarks Scan Velocity Modulator ROUT Analog Output Red GOUT Analog Output Green Analog Output Blue GNDO Ground, analog Back End XREF Reference Input for RGB DAC’s VSUPO Supply voltage, Analog Back End VRD/BCS DAC Reference, Beam current safety AGND...
CP-850/F Service Manual 4.4 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 features. Surround sound can be reproduced to a certain extent with two loudspeakers.
CP-850/F Service Manual 4.4.1.2 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 4.4.1.3 Analogue Section two selectable analogue pairs of audio baseband input (= two SCART inputs) input level: <2 V RMS, input impedance: >25...
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CP-850/F Service Manual Loud- Sound IF 1 Loudspeaker Pre- speaker Sound processing modulator Sound IF 2 Processing Subwoofer Headphone Sound Headphone Prescale Processing SCART 1 SCART 2 SCART1 SCART SCART 3 Prescale SCART Input Output Select SCART 4 Select MONO SCART2 Architecture of MSP341x Pin connections and short description...
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CP-850/F Service Manual Pin No. Pin Name Type Short description Not Connected Not Connected RESETQ Power-On-reset DACA_R Headphone out right DACA_L Headphone out left VREF2 Reference ground 2 high voltage part DACM_R Loudspeaker out Right DACM_L Loudspeaker out Left Not Connected Not Connected Not Connected SC2_OUT_R...
CP-850/F Service Manual 4.5 TDA4470 - MULTISTANDARD VIDEO-IF AND QUASI PARALLEL SOUND PROCESSOR 4.5.1 DESCRIPTION The TDA4470 is an integrated bipolar circuit for multi-standard video/sound IF (VIF/SIF) signal processing in TV/VCR and multimedia applications. The circuit processes all TV video IF signals with negative modulation (e.g., B/G standard), positive modulation (e.g., L standard) and the AM, FM/NICAM sound IF signals.
CP-850/F Service Manual 4.5.4 BLOCK DIAGRAM l' switch Loop Offset filter comp. (optional) Control FPLL phase shift switch VIF amp Video C AGC Video det. Standard switch Standard (VIF) C BL Tuner Tuner Supply C ref Take over FM det. point SIF 2 Intercarrier...
CP-850/F Service Manual 4.6 TDA894XJ STEREO AUDIO AMPLIFIER The TDA 8944J ( TDA 8946J ) is a dual-channel audio power amplifier with an output power of 2 x 7 W ( 2 x 15 W ) at an 8 load and a 12 V supply. The circuit contains two Bridges Tied Load (BTL) amplifiers with an all-NPN output stage and standby/mute logic.
CP-850/F Service Manual V CC1 V CC2 OUT1- IN1- IN1+ OUT1+ TDA8946J OUT2- IN2- IN2+ OUT2+ V CC STANDBY/ MODE MUTE LOGIC SHORT CIRCUIT TEMPERATURE PROTECTION MBK933 GND1 GND2 Block Diagram TDA8946J 4.7 TDA835XJ VERTICAL AMPLIFIER The TDA835xJ are power circuit for use in 90 and 110 colour deflection systems for field frequencies of 25 to 200Hz and 16/9 picture tubes.
CP-850/F Service Manual 4.8 The TDA6108JF includes three video output amplifiers in one plastic DIL-bent-SIL 9-pin medium power(DBS9MPF) package(SOT111-1), using high-voltage DMOS technology, and is intended to drive the three cathodes of a colours CRT directly. To obtain maximum performance, the amplifier should be used with black-current control. Features Typical bandwidth of 9.0 MHz for an output signal of 60 V(p-p) High slew rate of 1850V/...
CP-850/F Service Manual Block diagram TDA6108JF 4.9 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.
CP-850/F Service Manual 4.10 STR - W6754 4.10.1 GENERAL DESCRIPTION The STR-W6754 is an hybrid IC with a build-in MOSFET and control IC, designed for flyback converter type switch mode power supply applications. 4.10.2 FEATURES - Rugged 650 V Avalanche-Rated MOSFET, Simplified Surge Absorption, No VDSS Derating Required - 0.96 Ω...
CP-850/F Service Manual 4.10.4 ELECTRICAL CHARACTERISTICS at TA = +25°C, VCC = 20 V, voltage measurements are referenced to S/GND terminal(unless otherwise specified). -43-...
CP-850/F Service Manual 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 (VIF-AGC). The output signal of the VIF amplifier is applied to the FPLL carrier generation and the video demodulator.
CP-850/F Service Manual 5.2.5 VIDEO DEMODULATION AND AMPLIFIER The video IF signal, which is applied from the gain controlled IF amplifier, is multiplied with the inphase 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.
CP-850/F Service Manual 5.3.1.2 Input Selector The analog CVBS or SVHS luma signal are fed to the inputs CVBS1...7 of VSP94x2A (amplitude 0.5...1.5 V pp ). One signal is selected and fed to the first ADC. A second signal (SVHS Chroma) can be selected and fed to the other ADC. After clamping to the back porch both signals are AD-converted with an amplitude resolution of 9 bit.
CP-850/F Service Manual 5.3.1.8.2 Noise Reduction The structure of the temporal motion adaptive noise reduction is the same for VSP 94x5C as for chrominance signal. The output of the motion detector is weighted. The look-up table input value range is separated into 8 segments. It is possible to freely program different behaviour of the noise reduction by using predefined curve characteristic for each segment.
CP-850/F Service Manual 5.3.2.5 Luma Sharpness Enhancer (LSE) Sharpness is one of the most critical features for optimum picture quality. This important processing is performed in the LSE circuitry of DDP 3315C. It consists of the dynamic peaking, the luma transient improvement (LTI) and an adaptive mixer.
CP-850/F Service Manual a) Cr Cb input of CTI b) Cr Cb input + correction signal c) sharpened and limited Cr Cb 5.3.2.10 Analog Back End The digital RGB signals are converted to analogue RGB by three 10-bit digital to analogue converters (DAC). Each RGB signal has two additional DACs with 9-bit resolution to adjust analogue brightness (40% of the full RGB range) and cutoff / black level (60% of the full RGB range).
CP-850/F Service Manual The picture tube measurement returns results on every field for: - cutoff R - cutoff G - cutoff B - white drive R or G or B (sequentially) The average beam current limiter (BCL) works on both the digital YC r C b input from VSP and the inserted analog RGB signals (OSD and Teletext) by using the sense input for the beam current measurement.
CP-850/F Service Manual 5.4.2 ACQUISITION FEATURES Multistandard Digital Data Slicer Parallel Multi-norm Slicing (TTX, VPS, WSS) Four Different Framing Codes Available Data Caption only Limited by available Memory Programmable VBI-buffer Full Channel Data Slicing Supported Fully Digital Signal Processing Noise Measurement and Controlled Noise Compensation Attenuation Measurement and Compensation Group Delay Measurement and Compensation Exact Decoding of Echo Disturbed Signals...
CP-850/F Service Manual 5.4.5 OVER CURRENT PROTECTION In case of overload, the SMPS secondary voltages will drop. The voltage on pin 18 of microcontroller drops below a reference voltage (x.xxV). The controlling software which continuously monitors this voltage will switch the set to stand by mode.
CP-850/F Service Manual or Swedish OSD languages are selected, the teletext will be correctly displayed. However, if Polish, Hungarian, Czech, Slovakian, Rumanian or Russian OSD are selected, the consequence will be incorrect teletext display for the national option characters. Romanian national font options will be selected. PRIMARY OSD Language C12 C13 C14...
CP-850/F Service Manual AM signals are derived from the amplitude information, whereas the phase information serves for FM and NICAM demodulation. 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.
CP-850/F Service Manual 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. The devices is in mute mode when 2.5 V < VMODE < (Vcc-1.5 V). Operating : In this mode the amplifier is operating normally.
IC MEMORY 24LC16B1B M501 485506190001 DECO CTRL 29G2 PVC T0.25 I703 1451VF6A— IC PREAMP 451VF6A M561 48556293SD02 MARK BRAND “DAEWOO 25””29””32”” NEW” I801 1STRW6754- IC POWER STR-W6754 M681 4856812001 TIE CABLE NYLON66 DA100 I801A 4857027920 HEAT SINK AL EX NO ANODIZING...
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CP-850/F Service Manual PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK R419 RS01Y569J- R M-OXIDE FILM 1W L 5.6 OHM CC528 HCBK102KBA C CHIP CERA 50V X7R 1000PF K 1608 R444 RS02Y100JS R M-OXIDE FILM 2W 10 OHM J SMALL CC549 HCBK104KBA C CHIP CERA...
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CP-850/F Service Manual PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK RC610 HRFT103JBA R CHIP 1/10 10K OHM J 1608 4856310300 EYE LET BSR T0.2 (R1.6) SMALL RC661 HRFT822JBA R CHIP 1/10 8.2K OHM J 1608 4856310300 EYE LET BSR T0.2 (R1.6) SMALL...
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CP-850/F Service Manual PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK D801 DLT2A05G— DIODE LT2A05G J331 85801060GY WIRE COPPER 1/0.6 TIN COATING D802 DLT2A05G— DIODE LT2A05G J332 85801060GY WIRE COPPER 1/0.6 TIN COATING D803 DLT2A05G— DIODE LT2A05G J336 85801060GY...
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CP-850/F Service Manual PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK J423 85801060GY WIRE COPPER 1/0.6 TIN COATING LA04 5CPZ100K04 COIL PEAKING 10UH 10.5MM K (LAL04TB) J426 85801060GY WIRE COPPER 1/0.6 TIN COATING LA06 5CPZ100K04 COIL PEAKING 10UH 10.5MM K (LAL04TB) J427 85801060GY...
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CP-850/F Service Manual PART CODE PART NAME DESCRIPTION REMARK PART CODE PART NAME DESCRIPTION REMARK R578 RD-AZ330J- R CARBON FILM 1/6 33 OHM J R868 RD-AZ222J- R CARBON FILM 1/6 2.2K OHM J R579 RD-AZ330J- R CARBON FILM 1/6 33 OHM J R869 RD-AZ151J- R CARBON FILM...
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