Daewoo DTQ-14U1FSN Page 48 Service Manual Download

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TROUBLESHOOTING GUIDE

4. CH DON’T STOP

Check the input signal conditions

NG : Loss of signal or weak signal

OK : Go to the figure h

Appendix

Summary of Contents for DTQ-14U1FSN

Page 1: ...0U1FSN DTQ 14V1FSPN 20V1FSPN DTQ 14V5FSPN 20V4FSPN DTQ 14U1FSPN 20U1FSPN S M No CN001N 010R1 Jun 2002 U S A Canada Middle America AC 110V Mexico Chile Peru AC 220V DAEWOO ELECTRONICS CO LTD http svc dwe co kr DTQ 14U1FS N DTQ 14V5FCN DTQ 14V3FCN DTQ 20V4FCN DTQ 14V1FCN DTQ 14J4FCGN FCCN DTQ 20U1SSN 20V1SSN DTQ 14V1SCN 15U5SC DTQ 14V5SSPN 15U5SSPN DTQ 14V3SSN 20V3SSN ...

Page 2: ...NTROL PASSWORD SETTINGS 12 VOLTAGE CHART 13 WAVEFORMS 16 SCHEMATIC DIAGRAM 20 EXPLODED VIEW 21 ELECTRICAL PARTS LIST 29 IC DESCRIPTION 1 TROUBLE SHOOTING CHARTS 8 NO POWER 8 NO PICTURE 9 NO SOUND 10 CH DON T STOP 11 NO COLOR 12 NO VERTICAL DEFLECTION 12 NO ON SCREEN DISPLY 13 REMOTE CONTROL DOES NOT OPERATE 13 Caution In this Manual some parts can be changed for improving their performance without...

Page 3: ...E PICTURE TUBE HOWEVER THIS TUBE DOES NOT EMIT X RAYS WHEN THE HIGH VOLT AGE IS AT THE FACTORY SPECIFIED LEVEL THE PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC OPERATION AT HIGHER VOLT AGES MAY CAUSE A FAILURE OF THE PICTURE TUBE OR HIGH VOLTAGE SUPPLY AND UNDER CERTAIN CIRCUMSTANCES AMY PRODUCE RADIA TION IN EXCESS OF DESIRABLE LEVELS 2 ONLY FACTORY SPECIFIED C R T ANODE CONNECTORS MUST BE U...

Page 4: ...ock hazard and must be corrected imme diately GRAPHIC SYMBOLS The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the service personnel to the presence of uninsu lated dangerous voltage that may be of suffi cienty magnitude to constitute a risk of electric shock The exclamation point within an equilateral tri angle is intended to alert the service personne...

Page 5: ...n 4 Wall and shelf mounted installations using a commercial mounting kit must follow the factory approved mounting instructions A receiver mounted to a shelf or platform must retain its original feet or the equivalent thickness in spacers to provide adequate are flow across the bottom bolts or screws used for fasteners must not touch and parts or wiring Perform leakage test on cus tomized installa...

Page 6: ...ncy Synthesizer FS Tuning System TUNING RANGES VHF 2 13 12 UHF 14 69 56 CATV 1 125 125 SOUND OUTPUT 1 3 W 1 3 W 1 3 W 1 3 W SPEAKER 3 W 8 ohm ANTENNA INPUT IMPEDANCE 75 ohm Unbalanced AUXILIARY INPUT TERMINAL Front Video Audio Rear Video Audio INTERMEDIATE FREQUENCIES Picture IF Carrier Frequency 45 75 MHz Sound IF Carrier Frequency 41 25 MHz Color Sub Carrier Frequency 42 17 MHz REMOTE CONTROL R ...

Page 7: ...6 BLOCK DIAGRAM A MUTE H 5 ...

Page 8: ... into the red Press the volume up or down button to enter in the service mode you wish to adjust 2 How to memorize the adjusted values in the service mode Must press DISPLAY button the state which the screen is displaying each of service menus after all adjustments are completed each of all service menu Table A Adjust the values of service mode when a part is replaced PART REPLACED ADJUSTMENT NOTE...

Page 9: ...OSI 0 63 Align vertical DC bias using internal cross pattern S7 Vertical Size V SIZE 0 127 Align vertical amplitude using internal cross pattern S7 NO SD POWER OFF YES Automatically turn off in 15min for no received signal Vertical S Correction V SC 0 0 31 Must be set to 6 Vertical Linearity V LIN 20 0 31 Must be set to 16 S7 Internal Black Display internal BLACK pattern Internal 100 White Display...

Page 10: ...up or down button the screen is changing like this Using the volume up or down button select internal cross pattern Select service adjustment S6 You can see the OSD as shown in below 4 1 Horizontal Position Adjustment Select H PHASE item adjust H PHASE data value to obtain proper horizontal centering of the internal cross pattern at the left and right of the screen 4 2 Vertical Position Adjustment...

Page 11: ...own adjust service adjustment data of RD GD BD and RB GB BB until a good gray scale with normal whites is obtained ALIGNMENT INSTRUCTIONS Press the DISPLAY button to memorize the data 6 DIGITAL PRESET D P ADJUSTMENTS S9 SUBBRIGHTNESS ADJUSTMENT Receive a good local channel Enter the service mode and select service adjustment S9 You can see the OSD as shoown in below RD 58 GD 10 BD 65 RB 105 GB 160...

Page 12: ...alue to obtain normal brightness level Press the DISPLAY button to memorize the data CONTRAST Fixed value 27 TINT Fixed value 32 COLOR Fixed value 20 7 FACTORY OUTGOING MODE S12 FACT If you select the S12 then the set becomes factory outgoing status You can see the OSD outgoing OK ...

Page 13: ...e remote control to the reception window of your TV VCR Push buttons of remote control in sequence as follows 1 MUTE INFO MUTE Then the screen will appear as follows Using the channel up ã or down å buttons select S12 FACT Press the volume up º button the set becomes factory outgoing status Parental control password is reset Using the MENU buttons select the parental control menu set the new passw...

Page 14: ...2 2 79 0 31 33 0 0 34 0 0 35 0 36 0 36 3 41 0 37 0 55 0 38 2 81 0 35 39 3 27 0 40 0 0 41 0 0 42 2 52 0 43 4 95 0 5 MODE LOC PIN ON OFF 44 2 73 0 45 1 94 0 46 2 36 0 47 2 44 0 48 4 25 0 51 49 4 25 0 51 50 3 56 0 51 3 04 0 65 52 1 98 0 32 53 2 39 0 54 3 11 0 3 MODE LOC PIN ON OFF I301 1 0 0 2 13 35 0 3 26 34 3 63 4 2 22 0 5 2 22 0 6 25 85 0 7 2 33 0 MODE LOC PIN ON OFF I401 1 7 62 0 20 0 3 5 05 0 6 ...

Page 15: ... 17 4 65 4 99 18 4 14 4 99 19 0 0 20 0 0 21 0 0 22 0 0 23 NC NC 24 NC NC 25 0 0 MODE LOC PIN ON OFF I701 26 0 0 27 3 81 3 46 28 4 97 4 92 29 4 77 4 71 30 5 04 4 99 31 4 08 0 32 5 04 4 99 33 0 0 34 5 04 4 99 35 0 0 36 0 0 MODE LOC PIN ON OF I703 1 0 0 20 0 30 0 40 0 5 4 89 4 86 6 4 86 4 83 70 0 8 5 04 4 99 MODE LOC PIN ON OF I801 1 6 72 4 12 2 163 8 173 53 3 14 4 11 02 4 4 53 3 21 5 2 35 3 91 6 7 5...

Page 16: ... 0 Q404 E 0 0 B0 0 C 9 71 0 Q602 E 1 69 0 B 2 31 0 C 5 02 4 99 Q701 E 0 0 B0 0 C 5 02 5 Q702 E 0 0 B0 0 MODE LOC PIN ON OFF C 5 02 5 Q703 E 0 0 B0 0 C 4 93 4 9 Q704 E 4 95 4 92 B 4 32 4 29 C 5 02 4 2 Q707 E 0 21 5 B 0 07 4 9 C 2 89 0 Q760 E 0 0 B 0 0 68 C 0 4 0 Q804 E 133 1 119 38 B 132 6 118 96 C 12 31 5 Q805 E 5 02 10 88 B 5 6 5 59 C 4 01 0 Q851 E 0 0 B 0 0 68 ...

Page 17: ...16 WAVEFORMS 1 I101 PIN 19 2 I101 PIN 20 3 I101 PIN 21 4 I101 PIN 23 5 I101 PIN 40 5 I101 PIN 44 7 I101 PIN 46 8 I301 PIN7 ...

Page 18: ...17 WAVEFORMS 9 I701 PIN 7 10 I701 PIN 17 1 I701 PIN 18 12 I801 PIN 2 13 T402 PIN 25 5V 14 T402 PIN 10 5V 15 T402 PIN HEATER 16 T402 PIN 200V ...

Page 19: ...18 WAVEFORMS 17 T401 PIN H V 18 T801 PIN 133V 19 Q403 COLLECT OR 20 CR T SOCKET PIN B 21 CR T SOCKET PIN R 22 CR T SOCKET PIN G ...

Page 20: ... 2 B Q403 2 C R441 2 C R732 1 A R821 2 C C406 3 B C663 1 A D503 1 C Q404 3 B R442 2 C R733 1 A R822 2 C C408 2 C C701 2 A D504 2 B Q501 2 C R443 2 C R734 1 A R835 3 B C410 2 C C702 2 A D505 1 C Q575 2 B R444 2 C R735 1 A R851 2 B C411 2 C C703 2 A D541 1 C Q653 1 B R451 1 C R736 2 A R854 3 B C412 2 C C704 2 A D571 2 B Q701 2 A R452 1 C R737 2 A R855 3 B C413 2 C C705 2 A D572 2 B Q702 2 A R453 2 C...

Page 21: ...20 SCHEMATIC DIAGRAM ...

Page 22: ...21 EXPLODED VIEW 1 DTQ 14V1FSN ...

Page 23: ...22 EXPLODED VIEW 2 DTQ 14V3FSN ...

Page 24: ...23 EXPLODED VIEW 3 DTQ 14V5FCN FSN ...

Page 25: ...24 EXPLODED VIEW 4 DTQ 14U1FSN ...

Page 26: ...25 EXPLODED VIEW 5 DTQ 20V1FSN ...

Page 27: ...26 EXPLODED VIEW 6 DTQ 20V3FSN ...

Page 28: ...27 EXPLODED VIEW 7 DTQ 20V4FSN ...

Page 29: ...28 EXPLODED VIEW 8 DTQ 20U1FSN ...

Page 30: ... 1 2 1 6A 30 2291050616 FLUX SOLDER JS 64T3 40 2291050301 FLUX SOLVENT IM 1000 80 2TP07545CL TAPE OPP 45X50 CLEAR C403 CCYB2H103K C CERA 500V B 0 01MF K C404 CMYH3C722H C MYLAR 1 6KV BUP 7200PF H C406 CMYE2D434J C MYLAR 200V PU 0 43MF J C801 CL1UC3104M C LINE ACROSS WORLD AC250V 0 1UF M R 47 C802 CMYH3C332J C MYLAR 1 6KV BUP 3300PF J C804 CEYN2D331P C ELECTRO 200V LHS 330MF C881 CH1BFE472M C CERA ...

Page 31: ...EYE LET BSR T0 2 R1 6 LOC PART CODE PART NAME DESCRIPTION RE MARK E014 4856310300 EYE LET BSR T0 2 R1 6 E018 4856310300 EYE LET BSR T0 2 R1 6 E019 4856310300 EYE LET BSR T0 2 R1 6 E020 4856310300 EYE LET BSR T0 2 R1 6 E021 4856310600 EYE LET BSR T0 2 R2 3 E022 4856310300 EYE LET BSR T0 2 R1 6 E023 4856310300 EYE LET BSR T0 2 R1 6 E024 4856310600 EYE LET BSR T0 2 R2 3 E025 4856310300 EYE LET BSR T0...

Page 32: ...CEXF1C101V C ELECTRO 16V RSS 100MF 6 3X11 TP F801A 4857415001 CLIP FUSE PFC5000 0702 F801B 4857415001 CLIP FUSE PFC5000 0702 L601 58CX430599 COIL CHOKE AZ 9004Y 940K TP LOC PART CODE PART NAME DESCRIPTION RE MARK L805 58CX430599 COIL CHOKE AZ 9004Y 940K TP L901 5CPX221J COIL PEAKING 220UH J RADIAL Q201 TKSC945CY TR KSC 945C Y TAPPING Q401 TKSC2330Y TR KSC2330Y TP Q403 TKSC945CY TR KSC 945C Y TAPPI...

Page 33: ... 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J017 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J018 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J019 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J020 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J021 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J022 85801065GY WIRE COPPER AWG22 1 0 65 TIN COATING J023 85801065GY WIRE COPPER AWG22...

Page 34: ...153J R CARBON FILM 1 4 15K OHM J R452 RD 4Z113J R CARBON FILM 1 4 11K OHM J R453 RD AZ103J R CARBON FILM 1 6 10K OHM J LOC PART CODE PART NAME DESCRIPTION RE MARK R501 RD 2Z151J R CARBON FILM 1 2 150 OHM J R502 RD 2Z151J R CARBON FILM 1 2 150 OHM J R503 RD AZ752J R CARBON FILM 1 6 7 5K OHM J R504 RD AZ102J R CARBON FILM 1 6 1K OHM J R508 RD AZ102J R CARBON FILM 1 6 1K OHM J R509 RD AZ102J R CARBON...

Page 35: ... R797 RD AZ103J R CARBON FILM 1 6 10K OHM J LOC PART CODE PART NAME DESCRIPTION RE MARK R799 RD AZ103J R CARBON FILM 1 6 10K OHM J R802 RD 4Z205J R CARBON FILM 1 4 2M OHM J R804 RD 4Z201J R CARBON FILM 1 4 200 OHM J R805 RD 4Z152J R CARBON FILM 1 4 1 5K OHM J R806 RD 4Z752J R CARBON FILM 1 4 7 5K OHM J R808 RD 4Z102J R CARBON FILM 1 4 1K OHM J R809 RD 4Z102J R CARBON FILM 1 4 1K OHM J R810 RD 4Z10...

Page 36: ...1 6 1 3K OHM J 14 15 R734 RD AZ102J R CARBON FILM 1 6 1K OHM J 20 R814 RS02Z828JS R M OXIDE FILM 2W 0 82 OHM J SMALL 14 15 R814 RS01Z688J R M OXIDE FILM 1W 0 68 OHM J 20 R821 RD AZ363J R CARBON FILM 1 6 36K OHM J 14 R821 RD AZ273J R CARBON FILM 1 6 27K OHM J 15 20 R881 DEC7R0M140 POSISTOR ECPAC7R0M140 14 15 R882 DDB3R0M140 POSISTOR ECPBD3R0M140 20 R917 RD AZ241J R CARBON FILM 1 6 240 OHM J 14 R917...

Page 37: ...DAEWOO ELECTRONICS CO LTD 686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC ...

Page 38: ...1 IC DESCRIPTION U COM I701 X TAL 32 768 KHz Appendix ...

Page 39: ...s used 16K bytes Various characters attributes Character colors 16 colors Character background colors 16 colors Fringe shadow colors 16 colors Full screen colors 16 colors Rounding Underline Italic character slanting Attribute can be changed without spacing Vertical display start line number can be set for each row independently Row can be overlapped Horizontal display start position can be set fo...

Page 40: ...e FS 181 Channel AIR 2 69CH CABLE 1 125CH AFT Operation Fine Tuning 2 5Fn 2 5MHz AIR CABLE STD HRC IRC Only Cable 5 6CH is that AFT range is cover over broad band 2 5MHzFn 3 5MHz Memorize Channels If a channel is broadcasting the channel is memorized Direct Tuning 09KEY Channel Up Down Memorized Channels The Ch Up Down buttons on the Remocon and on the front panel are same function Search Channel ...

Page 41: ...th America ENG SPA POR E2PROM Interface I2C Bus Control CH 6 TRAP Function IS 31 PLL IC Band Data Control Byte 2 P3 P0 VHF L 1 VHF H 2 CH6 TRAP 5 IS 31 AIR Cable CH 6 Only UHF 8 5 The Table of Option and Schedule Model Name Pin Option Application Reference CN 001N 30 Auto Tint O Low DC_0V ON Auto Tint High DC_5V OFF 32 Bule Back O Low DC_0V Blue Back High DC_5V No Blue Back 33 Prison O Low DC_0V N...

Page 42: ... that comes from the 10 pin of LA76810 14 Connect this port to AGC of Tuner Default Voltage 3 75V Variable Voltage 3 25V 3 5V 4 0V Use only japan Model This port uses when is Stand By status Condition Input AC Power On Power off High DC 5V Output Red Power on Low DC 0V Output Reset terminal Active Low Filter terminal for PLL Output terminal Video signal input terminal TV Mode High Line Video Mode ...

Page 43: ...Low RF AV mode Low DC 0V On Auto Tint High DC 5V Off Use only to control Sound of Stereo mode High DC 5V No Blue Back Low DC 0V Blue Back Low DC 0V Normal High DC 5V Prison Low DC 0V Mono High DC 5V Stereo No Use Low DC 0V TV Video High DC 5V TV Only B BL P31 P32 P70 INT0 P71 INT1 P72 INT2 P73 INT3 P14 PWM1 P15 PWM2 P16 PWM3 P17 P00 P01 P02 P03 Output form and existence of pull up resistor for eve...

Page 44: ...VCC RED OUTPUT GREEN OUTPUT BLUE OUTPUT B AKB INPUT VERTICAL OUTPUT RAMP ALC FILTER HOR BUS VCC HOR AFC FILTER HORIZONTAL OUTPUT AUDIO OUT FM OUTPUT PIF AGC RF AGC OUT PIF INPUT1 PIF INPUT2 IF GND IF VCC FM FILTER AFT OUTPUT BUS DATA CHROMA AFC1 FILTER VIDEO OUTPUT VIDEO VER BUS GND EX VIDEO INPUT Y IN VIDEO VER VCC INT VIDEO INPUT S C IN BLACK LEVEL DETECTOR VIDEO OUTPUT APC FILTER VCO COIL2 VCO ...

Page 45: ...8 TROUBLESHOOTING GUIDE 1 NO POWER Appendix ...

Page 46: ...9 TROUBLESHOOTING GUIDE 2 NO PICTURE Check the waveform of I101 46 NG GO to the figure c OK Go the figure d 1701 MICOM Appendix ...

Page 47: ...10 TROUBLESHOOTING GUIDE 3 NO SOUND Check audio output signal of I101 1 NG Go to the figure e OK Go to the figure f g 1701 MICOM Appendix ...

Page 48: ...11 TROUBLESHOOTING GUIDE 4 CH DON T STOP Check the input signal conditions NG Loss of signal or weak signal OK Go to the figure h Appendix ...

Page 49: ...12 TROUBLESHOOTING GUIDE 5 NO COLOR 6 NO VERTICAL DEFLECTION Appendix ...

Page 50: ...13 TROUBLESHOOTING GUIDE 7 NO ON SCREEN DISPLAY 8 REMOTE CONTROL DOES NOT OPERATE Appendix ...

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