Daewoo DTQ-14T2FS Manuel de service

Service ManualColor TelevisionDAEWOO ELECTRONICS CO., LT D .CHASSIS:CN-201A/BNTSC-M SYSTEM MODEL:DTQ-14Q1FS, DTQ-14Q2TSDTQ-14Q3FS, DTQ-14T1ASDTQ-14T2F

8IMPORTANT SERVICE NOTES 1. X-RAY RADIATION PRECAUTION1) Excessive high voltage can produce potentiallyhazardous X-RAY RADIATION. To avoid such hazar

9

10GENERAL ADJUSTMENTS 1. GENERALIn the majority of cases, all color televisions will need onlyslight touch-up adjustment upon installation. Check the

1110. CONVERGENCE MAGNET ASSEMBLYPOSITIONINGIf Convergence magnet assembly and rubber wedgesneed mechanical positioning follow figure 2.10-1. COLOR PU

1210-2. CONVERGENCE ADJUSTMENTSNOTE: Before attempting any purity adjustments, thereceiver should be operated for at least 15minutes.A. CENTER CONVERG

1311. APC DET & PLL Tunning ADJUSTMENT1) Receive the signal of RF 100% Full Color bar 85dBuV.2) Press the S5(58H) key of Service Remocon, then exe

Symbol FunctionPIN NO SYMBOL NAME FUNCTION1 C COLLECTOR POWER TRANSISTOR COLLECTOR2 GND GROUND GROUND(POWER TRANSISTOR EMITTER)3 B BASE POWER TRANSIST

15A Start-up circuit is to start and stop a operation of a control IC by detecting a voltage appearing at a VINterminal(pin-9).At start up of a power

16As the circuit in Fig. 3 shows, the ON-time is controlled by changing a current charged by C1, which is as the result ofthat the detection winding (

174) Quasi-resonant operationBy inputting a voltage signal which is synchronized with the energy discharge time of a secondary winding of atransformer

FS (Frequency Synthesizer) Tuning SystemCATV ReadyHigh Focus Minineck CRT2CONTENTSSafety Precautions 3Control View 6Important Service Notes 8Block Dia

185) Drive circuitThe STR-S5707 applies the proportional drive system in order to minimize turn-on and saturation loss, and storagetime. In the conven

196) OCP (overcurrent protection)functionOvercurrent protection is performed pulse by directly detecting collector current of the power transistor.Con

20when the latch circuit is on. VINterminal voltage increases and decreases with-in the range from 4.9V typical to 8Vtypical and is prevented from abn

215. OCP (OVER CURRENT PROTECTION) CIRCUITThis circuit is designed to protect the circuit from over current due to overload occurred at the rear of 12

22TROUBLE SHOOTING CHART S NO POWER (NO OUTPUT SECOND POWER)DON'T OPERATE POWER ONCHECKF801250V AL801LINEFIL TERD801 +PBS208GUCHECKR801R CEM

23NO PICTURECHECK THE WAVE FORM OFU101 #IFOKNOGOTOGOTOABACHECKVIDEO SIGNAL4.6V2.6V2Vp-pZ502RC539L505BRIGHTCONTRASTI50145 VIDEO OUTPUT47 INTERNAL

24NO SOUNDCDMONO MODELSTEREO MODELGOTOGOTOCDCHECKAUDIOOUTPUTSIGNALCHECKAUDIOINPUTSIGNALCHECKSOUND B+DC 12VI6028 -A-OUT6 +A-OUT3 A-IN 2Z503 Z502R

25CH DON'T STOPCHECK INPUT SIGNALCONDITIONSGOTOEENO COLORGOODBADLOSS OF SIGNL ORWEEK SIGNALSF 501SAW FILTERI50111106 RF AGC OUTPUT23L501CHECK

26NO VERTICAL DEFLECTION I301INV 5OUTPUT 2VCC 6V.D.YCHECKOUTPUTCHECKDC 25VCHECKV.OUTSUGBAKCHECKSYNKSIGNAL17 V.OUT37 SYNC

27REMOTE CONTROL DOES NOT OPERATElL701REMOCONSENSORON SCREEN DISPLAY DOES NOT OPERATEIC701CHECKFOR,60HzOSC CHECKR, G, B, BLCHANGERGBBLIF OSD DOES NOTO

3PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO VIDEO PRODUCTS950ART941009CAUTION: DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY. NEVERPERFORM

28DESCRIPTION OF SEMICONDUCTORS LA76070 (BUS CONTROL, VIF/SIF/Y/C/DEF)I501 LA76070ABUS CONTROL, VIF/SIF/Y/C/DEF

29PIN ASSIGN OF IC LC864728V(I701) NOTE) XT is used 32.768 KHZ X-TALOUTPUT

30PIN ASSIGN OF IC TDA 7057Q (I603) 2 X 3 W sterei BTL audio output amplifierPIN ASSIGN OF IC LA7841 (I301) SYMBOL PIN DESCRIPTIONSGND1 1 signal gr

DESCRIPTIONSYMBOL31PIN ASSIGN OF IC TDA 9852 (I601) I2C-bus Controlled BTSC stereo/SAP decoder and audio processorPINSSDIP42 QFP44OUTL 1 40 output, l

51PARTS LIST(DTQ-21T1FS)Loc Item Code Item Name DescriptionZZ100 48B3225C04 TRANSMITTER REMOCON R-25C04ZZ110 PTACPWJ591 ACCESSORY AS DTQ-20T1FS30 486

52PARTS LIST(DTQ-21T1FS)Loc Item Code Item Name DescriptionC304 CEXF1V471V C ELECTRO 35V RSS 470MF (10X20) TPC305 CEXF1H101V C ELECTRO 50V RSS 100MF

53PARTS LIST(DTQ-21T1FS)Loc Item Code Item Name DescriptionC601 CEXF1H470V C ELECTRO 50V RSS 47MF (6.3X11) TPC602 CEXF1H470V C ELECTRO 50V RSS 47MF (

54PARTS LIST(DTQ-21T1FS)Loc Item Code Item Name DescriptionC810 CCXB3A471K C CERA 1KV B 470PF K (T)C811 CCXB3A471K C CERA 1KV B 470PF K (T)C812 CEXF1

55PARTS LIST(DTQ-21T1FS)Loc Item Code Item Name DescriptionCC715 HCQK101JCA C CHIP CERA 50V CH 100PF J 2012CC716 HCBK104KCA C CHIP CERA 50V X7R 0.1MF

56PARTS LIST(DTQ-21T1FS)Loc Item Code Item Name DescriptionI301B 7174301011 SCREW TAPPTITE TT2 RND 3X10 MFZNI501 1LA76070A- IC VIDEO PROCESSOR LA7607

4Product safety servicing guidelines for colortelevision receiversCAUTION :Do not attempt to modify this product in anyway. Unauthorized modifications

57PARTS LIST(DTQ-21T1FS)Loc Item Code Item Name DescriptionJ037 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATINGJ038 85801065GY WIRE COPPER AWG22 1/0.

58PARTS LIST(DTQ-21T1FS)Loc Item Code Item Name DescriptionJ607 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATINGJ608 85801065GY WIRE COPPER AWG22 1/0.

59PARTS LIST(DTQ-21T1FS)Loc Item Code Item Name DescriptionL501 58N0000037 COIL VCO TRF-V004L502 5CPZ150K02 COIL PEAKING 15UH K (AXIAL 3.5MM)L503 58C

60PARTS LIST(DTQ-21T1FS)Loc Item Code Item Name DescriptionQC703 T2SC2412KB TR CHIP 2SC2412K-T146-BRQC704 T2SC2412KB TR CHIP 2SC2412K-T146-BRQC901 T2

61PARTS LIST(DTQ-21T1FS)Loc Item Code Item Name DescriptionR905 RS02Z123JS R M-OXIDE FILM 2W 12K 0HM J SMALLR906 RS02Z123JS R M-OXIDE FILM 2W 12K 0HM

62PARTS LIST(DTQ-21T1FS)Loc Item Code Item Name DescriptionRC519 HRFT274JCA R CHIP 1/10 270K OHM J 2012RC520 HRFT561JCA R CHIP 1/10 560 OHM J 2012RC5

63PARTS LIST(DTQ-21T1FS)Loc Item Code Item Name DescriptionRC705 HRFT102JCA R CHIP 1/10 1K OHM J 2012RC706 HRFT102JCA R CHIP 1/10 1K OHM J 2012RC707

64PARTS LIST(DTQ-21T1FS)Loc Item Code Item Name DescriptionRC913 HRFT201JCA R CHIP 1/10 200 OHM J 2012RC917 HRFT000-CA R CHIP 1/10 0 OHM 2012RC918 HR

65Loc Item Code Item Name DescriptionPCW1 4859903610 POWER CORD AS DJ-10W + BSP3-1/2H = 2100F801 5F1GB4021L FUSE GLASS TUBE 4L/CSA TL 4A125V MF51RS801

66 OPTION LIST CN-201A/B MODEL(Inch, Mono, Stereo)CN-201A/B 14”/20”/21” OPTION(MAIN PCB)14 Inch DTQ-14Q1 SERIES, DTQ-14Q2 SERIES, DTQ-14Q3 SERIES, DT

5with a meter to be certain that the high voltage does notexceed the specified value and that it is regulatingcorrectly. We suggest that you and your

67CN-201A/B 14”/20”/21” AUDIO OPTIONLoc. 14 Inch(Mono) 20 Inch(Mono) 20 Inch(Stereo) 21 Inch(Stereo)C603 * * 63V MEU 0.15MF 63V MEU 0.15MF C605 * * 5

68Loc. 14 Inch(Mono) 20 Inch(Mono) 20 Inch(Stereo) 21 Inch(Stereo)J605 * * INSERT INSERTJ606 * * INSERT INSERTJ607 * * INSERT INSERTJ608 * * INSERT IN

6CONTROL VIEW MONO MODELSTEREO MODELYour TV comes with a remote control. The section below summarizes the buttons, controls, and terminals that youwi

ENGINEER NOTE

71 POWERUse this button to turn your TV on or off.2 CHUse these buttons to change channels on your TV, or select items inthe menu system.3 VOLUse thes

DAEWOO ELECTRONICS CO., LTD.686, AHYEON-DONG, MAPO-GU,SEOUL, KOREA.C.P.O. BOX 8003 SEOUL KOREATELEX : DWELEC K28177-8F A X : (02) 364-5588,5305T E L :

6CONTROL VIEW MONO MODELSTEREO MODELYour TV comes with a remote control. The section below summarizes the buttons, controls, and terminals that youwi

71 POWERUse this button to turn your TV on or off.2 CHUse these buttons to change channels on your TV, or select items inthe menu system.3 VOLUse thes