Daewoo DTH-291F Service Manual
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Daewoo DTH-291F Service Manual

Daewoo DTH-291F Service Manual

Chassis cm-400f
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Service Manual
Color Television
CHSSIS MODEL
CM-400F
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.
S/M No : TCN400FEF1
DTH-291F
SEP. 2005

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  • Page 1 S/M No : TCN400FEF1 Service Manual Color Television CHSSIS MODEL DTH-291F CM-400F 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.

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SAFETY PRECAUTIONS SPECIFICATIONS CIRCUIT BLOCK DIAGRAM ALIGNMENT INSTRUCTIONS YOUR REMOTE CONTROL SERVICE MODE ADJUSTMENT ASSEMBLY ADJUSTMENT APPENDIX(Appendix is provide only by internet[http://svc.dwe.co.kr]) IC DESCRIPTION UOC III SERIES TDA8358J VERTICAL AMPLIFIER TDA6107AJF 24WC16-16 KB EEPROM LA42072N-E AUDIO AMPLIFIER STR-W6735/56 WAVEFORMS TROUBLE SHOOTING GUIDE...

  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY. SUBJECT : X-RADIATION NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFAC- TURER'S APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY VOID 1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PERSON- THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANT RESULT- NEL COVER THE SUBJECT OF X-RADIATION.
  • Page 4 SAFETY PRECAUTIONS CAUTION : Do not attempt to modify this product in any way. Unau- The lightning flash with arrowhead symbol, thorized modifications will not only void the warranty, but may lead to your within an equilateral triangle, is intended to alert being liable for any resulting property damage or user injury.
  • Page 5 SAFETY PRECAUTIONS SUBJECT : IMPLOSION 4. Wall and shelf mounted installations using a commercial mounting kit, must follow the factory approved mounting instructions. A 1. All direct viewed picture tubes are equipped with an integral implo- receiver mounted to a shelf or platform must retain its original sion protection system, but care should be taken to avoid damage feet(or the equivalent thickness in spacers) to provide adequate are during installation.

  • Page 6: Specifications

    SPECIFICTION Model DTH-291F Item CHASSIS CM-400 TV Standard NTSC-M, PAL-N, PAL-M Power Input AC 220V, 50/60Hz Power Consumption 107W Tuning System Frequency Synthesizer(FS) Tuning System Tuning Ranges VHF(L) : CH2 - CH6 UHF(H) : CH7 - CH13 UHF : CH14 - CH69...

  • Page 7: Circuit Block Diagram

    CIRCUIT BLOCK DIAGRAM...

  • Page 8: Alignment Instructions

    ALIGNMENT INSTRUCTION Your Remote Control(R-48C04) 1. POWER Use this button to turn your TV on or off. 2. MUTE Use to turn the TV’s sound on and off. 3. WCHV Use these buttons to change channels on your TV, or select items in the menu system. 4.

  • Page 9: Service Mode Adjustment

    ALIGNMENT INSTRUCTION 1. SERVICE MODE ADJUSTMENTS Follow the steps below whenever service adjustment is required. See Table- A and Table- B to determine if service adjustments are required. 1) How to enter the service mode using the user remote control. - Turn the set on.
  • Page 10 ALIGNMENT INSTRUCTION Table-B. CM-400F(DTH-291F) EEPROM DATA MODE NAME REMARKS MODE NAME REMARKS HEAT RUN RUN OFF SCREEN ADJUST OEC : 650V PWLDAC AGC AUTO AGC LEVEL IFOFF S7-2 CHSE BPBS CBPS Fine Tunning V.SLOPE V.CENTER V.SIZE R-GAIN H.CENTER G-GAIN H.SIZE B-GAIN V.LINEARITY...

  • Page 11: Assembly Adjustment

    ALIGNMENT INSTRUCTION 2. ASSEMBLY ADJUSTMENTS 1) SCREEN ADJUSTMENT (S2) Enter the service mode and select service adjustment S2. You can see the one horizontal line on the screen. Adjust the Screen Control Volume (located on FBT) so that the horizontal line onscreen may be disappeared.
  • Page 12 ALIGNMENT INSTRUCTION 4-2) Vertical Position Adjustment. - Select V.SLOPE item, adjust V.SLOPE data value till the horizontal line in the centre of the video signal is just at the position where the blanking stars. - Select V.CENTER item, adjust V.CENTER data value to center the raster properly on the screen. 4-3) Vertical Size Adjustment - Select V.SIZE item, adjust V.SIZE data value to proper vertical size as follows.
  • Page 13 ALIGNMENT INSTRUCTION 4-4). EAST / WEST Adjustment Adjust the H.PARALLEL, H.SIZE, H-BOW, PARABOLA, EW TRAPEZ, CORNER TOP, CORNER BOTTOM to compensate for geometrical distortion. H.PARALLEL H.SIZE PARABOLA CORNER TOP, CORNER BOTTOM EW TRAPEZ -12-...
  • Page 14 ALIGNMENT INSTRUCTION 5) WHITE BALANCE ADJUSTMENT(S8) Receive a good local channel. Enter the service mode and select service adjustment S8. You can see the OSD as shown in below. R-GAIN SRC R-BIAS G-GAIN SRC G-BIAS B-GAIN CVI R-BIAS R-BIAS CVI G-BIAS G-BIAS SELECT ADJUST...

  • Page 15: Ic Description

    IC DESCRIPTION 1. UOC III SERIES 1-1. UOC III BLOCK DIAGRAM -14-...
  • Page 16 IC DESCRIPTION 1-2. UOC III FEATURES -15-...
  • Page 17 IC DESCRIPTION -16-...
  • Page 18 IC DESCRIPTION -17-...
  • Page 19 IC DESCRIPTION -18-...
  • Page 20 IC DESCRIPTION HERCULES FULL-STEREO (SSDIP90) (standard version) -19-...
  • Page 21 IC DESCRIPTION STANDARD FACE DO WN VERSION VERSION SYMBOL DESCRIPTION VSSP2 ground VSSC4 ground VDDC4 digital supply to SDACs (1.8V) VDDA3(3.3V) supply (3.3 V) VREF_POS_LSL positive reference voltage SDAC (3.3 V) VREF_NEG_LSL+HPL negative reference voltage SDAC (0 V) VREF_POS_LSR+HPR positive reference voltage SDAC (3.3 V) VREF_NEG_HPL+HPR negative reference voltage SDAC (0 V) VREF_POS_HPR...
  • Page 22 IC DESCRIPTION STANDARD FACE DO WN VERSION VERSION SYMBOL DESCRIPTION VIFIN2 IF input 2 vertical sawtooth capacitor IREF reference current input GNDIF ground connection for IF ampli er SIFIN1/DVBIN1 SIF input 1 / DVB input 1 SIFIN2/DVBIN2 SIF input 2 / DVB input 2 AGCOUT tuner AGC output EHTO...
  • Page 23 IC DESCRIPTION STANDARD FACE DO WN VERSION VERSION SYMBOL DESCRIPTION AGC2SIF 44/- 47/- AGC capacitor second sound IF supply voltage TV processor (+5 V) IFVO/SVO/CVBSI IF video output / selected CVBS output / CVBS input AUDIOIN4 audio 4 input AUDIOIN4L audio-4 input (left signal) AUDIOIN4R audio-4 input (right signal)
  • Page 24 IC DESCRIPTION STANDARD FACE DO WN VERSION VERSION SYMBOL DESCRIPTION scan velocity modulation output FBISO/CSY ybac k input/sandcastle output or composite H/V timing output HOUT horizontal output VSScomb ground connection for comb lter VDDcomb supply voltage for comb lter (5 V) VIN (R/P IN2/C V-input for YUV interface (2...
  • Page 25 IC DESCRIPTION STANDARD FACE DO WN VERSION VERSION SYMBOL DESCRIPTION VDDA1 analog supply for TCG m -Controller and digital supply for TV-processor (+3.3 V) VREFAD_NEG negative reference voltage (0 V) VREFAD_POS positive reference voltage (3.3 V) VREFAD reference voltage for audio ADCs (3.3/2 V) GNDA ground VDDA(1.8V)
  • Page 26 IC DESCRIPTION STANDARD FACE DO WN VERSION VERSION SYMBOL DESCRIPTION P1.6/SCL port 1.6 or I C-bus clock line P1.7/SDA port 1.7 or I C-bus data line VDDP(3.3V) supply to periphery and on-chip voltage regulator (3.3 V) P2.0/TPWM port 2.0 or Tuning PWM output P2.1/PWM0 port 2.1 or PWM0 output P2.2/PWM1...

  • Page 27: Tda8358J Vertical Amplifier

    IC DESCRIPTION -26-...
  • Page 28 IC DESCRIPTION -27-...

  • Page 29: Tda6107Ajf

    IC DESCRIPTION -28-...

  • Page 30: 24Wc16-16 Kb Eeprom

    IC DESCRIPTION -29-...

  • Page 31: La42072N-E Audio Amplifier

    IC DESCRIPTION -30-...

  • Page 32: Str-W6735/56

    IC DESCRIPTION 6. STR-W6735 FUNCTIONS OF EACH TERMINAL TERMINAL SYMBOLS DESCRIPTIONS FUNCTIONS DRAIN TERMINAL MOSFET DRAIN S/GND SOURCE/GND MOSFET SOURCE / GND INPUT OF POWER SUPPLY SET UP TERMINAL FOR CONTROL CIRCUIT DELAY AT OVERLOAD / OVERLOAD PROTECTION SS/OLP SOFT START SET UP AND SOFT START TERMINAL OPERATION TIME SET UP...
  • Page 33 IC DESCRIPTION ELECTRICAL CHARACTERISTICS IN CONTROL PART (Ta=25¡ , Vcc=20V, UNLESS OTHERWISE SPECIFIED) RATINGS PARAMETER TERMINAL SYMBOL UNITES POWER SUPPLY START-UP OPERATION OPERATION START VOLTAGE Vcc(on) 16.3 18.2 19.9 OPERATION STOP VOLTAGE Vcc(off) 10.6 CIRCUIT CURRENT IN OPERATION Icc(on) CIRCUIT CURRENT IN NON-OPERATION Icc(off) OSCILLATION FREQUENCY fosc...

  • Page 34: Waveforms

    WAVEFORMS Appendix WAVEFORMS 1).I801 PIN1 2).T402(FBT) HOR.OUT 3).T402(FBT) 190V(D406) 4).I701 PIN73 HOUT 5).I701 PIN76 V+.OUT 6).I701 PIN76 V-.OUT -33-...
  • Page 35 WAVEFORMS Appendix 7).I701 PIN75 EW OUT 8).I701 PIN46 MONITOR OUT 9).I701 (X-TAL) 10).I301 PIN4 V.OUT 11).I901 PIN R.IN 12).I901 PIN R.OUT -34-...

  • Page 36: Troubleshooting Guide

    TROUBLESHOOTING GUIDE Appendix 1. NO POWER -35-...

  • Page 37: Picture

    TROUBLESHOOTING GUIDE Appendix 2. NO PICTURE NG : Go To The Figure (A) Check The Waveform of TU101 IF PIN OK : Go To The Figure (B) TU101 TUNER CHECK VOLTAGE CHECK CLOCK,DATA Z101 Z101 CHECK THE SAW FILTER SAW FILTER VOLTAGE SCL/SD #22,43,45,63,80...

  • Page 38: Sound

    TROUBLESHOOTING GUIDE Appendix 3. NO SOUND NG : Go To The Figure (C) Check The Output Signal of I701 #57,58 OK : Go To The Figure (D) TU101 TUNER CHECK VOLTAGE CHECK CLOCK,DATA Z101 Z101 SAW FILTER SAW FILTER SCL/SD #7,8 I701 #22,43,45,63,80...

  • Page 39: Don't Memory Or Skip

    TROUBLESHOOTING GUIDE Appendix 4. CH DON’T MEMORY or SKIP NG : Loss of Signal or Weak Signal Check The Iutput Signal Conditions OK : Go To The Figure (E) TU101 TUNER CHECK CHECK CLOCK,DATA VOLTAGE Z101 Z101 SAW FILTER SAW FILTER I702 EEPROM #5,6...

  • Page 40: Color

    TROUBLESHOOTING GUIDE Appendix 5. NO COLOR CHECK THE VOLTAGE CHECK THE #83,84,85 #22,43,45,63,80 RGB OUT I701 3.3V #9,16,86,88 #18,19 CHECK THE CHECK THE X701 CRYSTAL CRYSTAL 24.576MHz 6. NO VERTICAL DEFLECTION I701 CHECK THE VERTICAL SIGNAL VERTICAL #76,77 CHECK THE CRYSTAL #18,19 X701...

  • Page 41: Remote Control Doesnot Operate

    TROUBLESHOOTING GUIDE Appendix 7. REMOTE CONTROL DOES NOT OPERATE CHECK THE VOLTAGE #22,43,45,63,80 I701 3.3V #9,16,86,88 #18,19 CHECK THE CHECK THE X701 CRYSTAL CRYSTAL 24.576MHz CHECK THE WAVEFORM CHECK THE IF01 VOLTAGE IC PREAMP 3.3V -40-...

  • Page 42: Electrical Parts List

    ELECTRICAL PARTS LIST 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(http://svc.dwe.co.kr) **This BOM is based on DTQ-291F PARTS CODE PARTS NAME...
  • Page 43 ELECTRICAL PARTS LIST PARTS CODE PARTS NAME PARTS DESCRIPTION REMARK M781 4857818703 CLOTH BLACK FELT 300X15XT1.0 M791 4857923300 DOOR LOCK LA701(KIFCO) ZZ201 PTSPPWJ904 SPEAKER AS DTQ-29U8 PA601 4850704S32 CONNECTOR YH025-04+YRT205+ULW=900 SP01 4858315210 SPEAKER SP-78128F02 SP01A 7172401212 SCREW TAPPTITE TT2 TRS 4X12 MFZNBK SP02 4858315210 SPEAKER...
  • Page 44 ELECTRICAL PARTS LIST PARTS CODE PARTS NAME PARTS DESCRIPTION REMARK 00001 1LD1117V33 IC REGULATOR LD1117AV33 3.3V 2% TO-220 0000A 4857026900 HEAT SINK AL EX 0000B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN I805 1K78R05—- IC REGULATOR KIA78R05API IF01 1346VF6—- IC PREAMP 346VF6 JP501 4859111550...
  • Page 45 ELECTRICAL PARTS LIST PARTS CODE PARTS NAME PARTS DESCRIPTION REMARK C417 CEXF1E102V C ELECTRO 25V RSS 1000MF (13X20) TP C419 CEXF2A470V C ELECTRO 100V RSS 47MF (10X16) TP C613 CEXF1E102V C ELECTRO 25V RSS 1000MF (13X20) TP C804 CH1BEE472M C CERA AC U/C/V 2.5KV 4700PF TP C805 CH1BEE472M...
  • Page 46 ELECTRICAL PARTS LIST PARTS CODE PARTS NAME PARTS DESCRIPTION REMARK C119 CCXF1H103Z C CERA 50V F 0.01MF Z (TAPPING) C122 CEXF1H229V C ELECTRO 50V RSS 2.2MF (5X11) TP C123 CEXF1H229V C ELECTRO 50V RSS 2.2MF (5X11) TP C124 CMXM2A473J C MYLAR 100V 0.047MF J (TP) C125 CEXF1H229V...
  • Page 47 ELECTRICAL PARTS LIST PARTS CODE PARTS NAME PARTS DESCRIPTION REMARK C627 CMXL1J104J C MYLAR 63V MEU 0.1MF J C628 CEXF1H478V C ELECTRO 50V RSS 0.47MF (5X11) TP C629 CEXF1H478V C ELECTRO 50V RSS 0.47MF (5X11) TP C701 CEXF1C101V C ELECTRO 16V RSS 100MF (6.3X11) TP C704 CEXF1E470V...
  • Page 48 ELECTRICAL PARTS LIST PARTS CODE PARTS NAME PARTS DESCRIPTION REMARK Q101 TKTC3198Y- KTC3198Y Q201 TKTA1266Y- KTA1266Y (TP) Q602 TKTA1266Y- KTA1266Y (TP) Q704 TKTC3198Y- KTC3198Y Q705 TKTA1270Y- KTA1270Y (TP) Q706 TKTC3198Y- KTC3198Y Q707 TKTA1270Y- KTA1270Y (TP) Q708 TKTC3198Y- KTC3198Y Q801 TKTC3203Y- KTC3203-Y Q804 TKTC3198Y-...
  • Page 49 ELECTRICAL PARTS LIST PARTS CODE PARTS NAME PARTS DESCRIPTION REMARK C720 CBZF1H104Z C CERA SEMI 50V F 0.1MF Z C728 CCZF1H103Z C CERA 50V F 0.01MF Z C733 CBZF1H104Z C CERA SEMI 50V F 0.1MF Z C736 CCZB1H102K C CERA 50V B 1000PF K (AXIAL) C738 CCZB1H102K...
  • Page 50 ELECTRICAL PARTS LIST PARTS CODE PARTS NAME PARTS DESCRIPTION REMARK L403 5MC0000100 COIL BEAD HC-3550 L701 5CPZ479K04 COIL PEAKING 4.7UH K (AXIAL 10.5MM) L702 5CPZ479K02 COIL PEAKING 4.7UH K (AXIAL 3.5MM) L703 5CPZ479K02 COIL PEAKING 4.7UH K (AXIAL 3.5MM) L704 5CPZ479K02 COIL PEAKING 4.7UH K (AXIAL 3.5MM)
  • Page 51 ELECTRICAL PARTS LIST PARTS CODE PARTS NAME PARTS DESCRIPTION REMARK R410 RN-AZ9101F R METAL FILM 1/6 9.1K OHM F R412 RN-AZ1202F R METAL FILM 1/6 12K OHM F R413 RD-4Z470J- R CARBON FILM 1/4 47 OHM J R418 RD-4Z102J- R CARBON FILM 1/4 1K OHM J R601 RD-AZ622J-...
  • Page 52 ELECTRICAL PARTS LIST PARTS CODE PARTS NAME PARTS DESCRIPTION REMARK R720 RD-AZ362J- R CARBON FILM 1/6 3.6K OHM J R722 RD-AZ100J- R CARBON FILM 1/6 10 OHM J R723 RD-AZ122J- R CARBON FILM 1/6 1.2K OHM J R725 RD-AZ513J- R CARBON FILM 1/6 51K OHM J R726 RD-AZ101J-...
  • Page 53 ELECTRICAL PARTS LIST PARTS CODE PARTS NAME PARTS DESCRIPTION REMARK R832 RD-AZ752J- R CARBON FILM 1/6 7.5K OHM J R833 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R834 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R835 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R840 RC-2Z565KP...
  • Page 54 ELECTRICAL PARTS LIST PARTS CODE PARTS NAME PARTS DESCRIPTION REMARK P903 4859238620 CONN WAFER YPW500-02 PA902 4850704S04 CONNECTOR YH025-04+YST025+ULW=400 SCT1 4859303530 SOCKET CRT PCS629-03C ZZ200 PTCPJ0E155 PCB CRT ODD SHAPE AS DTH-29U1SSPV C904 CEXF2E479V C ELECTRO 250V RSS 4.7MF (10X16)TP C905 CEXF2E479V C ELECTRO...

  • Page 55: Different Parts List

    DIFFERENT PARTS LIST **This BOM is based on DTQ-29U1SCV, it is different parts list in comparison with DTQ-29U1SSFV. PARTS CODE PARTS NAME PARTS DESCRIPTION 1 00001 1STRW6756- IC POWER STR-W6756 2 0000A 4857027602 HEAT SINK AL EX BK 3 0000B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN...
  • Page 56 DIFFERENT PARTS LIST **This BOM is based on DTQ-29U1SCV, it is different parts list in comparison with DTQ-29U5SSFV. PARTS CODE PARTS NAME PARTS DESCRIPTION 1 00001 1STRW6756- IC POWER STR-W6756 2 0000A 4857027602 HEAT SINK AL EX BK 3 AD001 4859000240 ADAPTER 2P15A 300V(D=4.0)
  • Page 57 DIFFERENT PARTS LIST **This BOM is based on DTQ-29U1SCV, it is different parts list in comparison with DTQ-29U4SCV. PARTS CODE PARTS CODE PARTS NAME PARTS NAME PARTS DESCRIPTION PARTS DESCRIPTION 1 A001 4859819191 PCB MAIN 330X246 D1B 2 C118 CMXL1J154J C MYLAR 63V MEU 0.15MF J 3 C415...

  • Page 58: Printed Circuit Board

    -57-...
  • Page 59 -58-...

  • Page 60: Schematic Diagram

    -59-...
  • Page 61 -60-...

  • Page 62: Explode View

    -61-...
  • Page 63 DAEWOO ELECTRONICS CORP. 686, AHYEON-DONG, MAPO-GU, SEOUL, KOREA. C.P.O. BOX 8003 SEOUL KOREA PRINTED DATE : SEP. 2005...

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