Daewoo DTH-14V1FS Service Manual Download Page 40

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Troubleshooting Guide

7. NO ON-SCREEN DISPLAY

8. REMOTE CONTROL DOES NOT OPERATE

I70 1

M IC O M

X 701

32.768K H z

#10

#11

#12

S T-B Y

C heck

the crystal

IL 701

R E M O C O N

P R E A M P

S T-BY

G ND

#34

O U T

C heck

the waveform

I701

M IC O M

X701

32.768KH z

#10

#11

#12

ST-BY

C heck

the crystal

#24

#25

SDA

SC L

I101

#16

#17

C heck

clock/data signal

#20

#21

V.SYN C IN

H .SYN C IN

Check

the signal (60Hz)

Check

the signal (15,734Hz)

#23

#22

OSD R

OSD G

OSD B

BLANK

#15

#14

C heck

O SD R/G/B/BLANK signal

If OSD does not operate,
then change the I701

Summary of Contents for DTH-14V1FS

Page 1: ...e Icon Type Trilingual Eug Span Fren Programmable channel skip memory 24 hour programmable TV on off function Convenient sleep timer Built in Closed Caption Full function infrared remote control Model Name Screen Size 14 20 21 VHF 2 13 UHF 14 69 113 Cable Ch VHF 2 13 UHF 14 69 113 Cable Ch VHF 2 13 UHF 14 69 113 Cable Ch AC 100 260 50 60Hz AC 100 260 50 60Hz AC 100 260 50 60Hz 63W 70W 73W 336 x 33...

Page 2: ...ruction 6 Block Diagram 19 Alignment Instructions 20 Service mode adjustments 20 Assembly adjustments 21 IC Description 25 Troubleshooting Guide 34 No power 34 No picture 35 No sound 36 CH don t stop 37 No color 38 No vertical deflection 38 No on screen display 39 Remote control does not operate 39 Service Parts List Recommendable Spare Parts List 40 Exploded View 47 Service Guide ...

Page 3: ...PICTURE TUBE HO W EVER THIS TUBE DO ES NOT EM IT X RAYS W HEN THE HIG H VO LT AGE IS AT THE FACTORY SPECIFIED LEVEL THE PROPER VALUE IS G IVEN IN THE APPLICABLE SCHEM ATIC O PERATION AT HIG HER VO LT AGES M AY CAUSE A FAILURE OF THE PICTURE TUBE O R HIG H VO LTAGE SUPP LY AND UNDER CERTAIN CIRCUMSTANCES AM Y PRODUCE RADIA TION IN EXCESS OF DESIRABLE LEVELS 2 ONLY FACTO RY SPECIFIED C R T ANO DE CO...

Page 4: ...ck 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 personnel...

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: ...er FS Tuning System TUNING RANGES VHF 2 13 12 UHF 2 13 56 CATV 1 125 125 SOUND OUTPUT 4W SPEAKER 3 W 8 ohm ANTENNA INPUT IMPEDANCE 75 ohm Unbalanced AUXILIARY INPUT TERMINAL Front Video Audio Ear phone 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 38T01 SPECIAL FUNCTIONS 3...

Page 7: ...ator lights up when the AC power cord is connected to a power source 6 Remote Control Receiver This receiver receives a signal from your remote control Do not block it 7 VIDEO IN jack Use this jack to receive a video signal from another A V component 8 AUDIO IN jack Use this jack to receive an aideo signal from another A V component 9 EARPHONE jack Use this jack to receive an audio signal from you...

Page 8: ...ons in the menu system or to change audio and video settings 5 MENU Use this button to turn the TV s menu system on and off 6 DISPLAY Use this button to select the TV s signal source 7 INPUT Use this button to select the tv s signal source 8 VIDEO Use this button to display video adjustment items 9 0 9 Use these buttons to change channels 10 SLEEP Use this button to program the TV to turn off afte...

Page 9: ... select Air or Cable If you connected an antenna to your TV select Air If you connected a cable system select Cable 3 Use the CH buttons to select Memorize Channels then use the VOL button to enter the Memorize Channels process Again press the VOL button to begin 4 Press the MENU button to return to Set Up menu 5 Press the MENU button three times to return to normal TV viewing Your TV s channel me...

Page 10: ...hannel Memory Your TV s memory determines the channels that are available using the CH buttons You can add channels to this memory or remove them from memory If a channel is removed from memory you can tune to it with the number buttons but you cannot tune to it with the CH buttons If there are just one channel memorized then the Add Delete Channels function will search the whole channels But if t...

Page 11: ... button to return to normal TV viewing Add Delete Channels Air 11 This channel is not in memory Press VOL to add Press CH for other channels Press MENU to return to Set up menu 4 Add Delete Channels Air 11 This channel is in memory Press VOL to delete Press CH for other channels Press MENU to return to Set up menu 5 Select Set Up Language English Reception Air Memorize Channels Add Delete Channels...

Page 12: ...another video setting to adjust 6 When you are finished press the MENU button until menu OSD will be disappeared Returning to the factory settings If you would like to return to the original video settings as they were calibrated at the factory follow these steps 1 With the TV on press the MENU button then Video menu will appear 2 Press the VOL buttons to set the Settings to Preset The TV will rem...

Page 13: ... tones If flesh tones seem too red or purple press the VOL button if flesh tones are too green press the VOL button Using Timer Functions Your TV has a built in clock and you can set the TV to turn on and off at times that you select You can also set your TV to turn off after counting down a certain amount of time Setting the Clock 1 With the TV turned on press the MENU button until Time menu will...

Page 14: ...he MENU button until Time menu will be displayed 2 Use the CH buttons to select Off time item 3 If you hold down either VOL or VOL button the corresponding numbers will change more quickly 4 When the setting is correct use the CH buttons to select another Time function or press the MENU button until menu OSD will be disappeared Canceling the Wake up Timer or Off Timer If you would like to cancel t...

Page 15: ... This section contains descriptions of the more advanced features of your TV Changing the Language of the On screen Menus You can choose to display the on screen menus in English Spanish French To change the on screen language 1 With the TV on press the MENU button twice then Set Up menu will appear 2 The Language item will be selected Press the VOL buttons to select the language you want to use E...

Page 16: ...nds or press the MENU button to return to normal TV viewing Your setting will remain intact until you change it CC on Mute When the sound is muted user can select the caption display It will display the caption content instead of sound mute 1 With the TV turned on press the MENU button until Special menu will be displayed 2 Use the CH buttons to select CC on Mute item 3 Use the VOL buttons to sele...

Page 17: ...al menu will be displayed 2 Use the CH buttons select system item 3 Use the VOL buttons to selcet AUTO PAL M PAL N or NSTC Select Special Closed Caption C 1 CC on Mute OFF Power Restore On System AUTO Adjust Exit 3 Select Special Closed Caption C1 CC on Mute C1 Power Restore OFF System AUTO Adjust Exit 2 Select Special Closed Caption C1 CC on Mute C1 Power Restore OFF System AUTO Adjust Exit 1 Sel...

Page 18: ...t may be a station problem Check that the antenna is connected and is in good working order has no broken wires and is adjusted correctly The picture is OK but the sound is poor Try another station If the other stations are OK it may be a station problem Check that the antenna is connected is in good working order has no broken wires and adjusted correctly There is poor reception on some channels ...

Page 19: ...orized modification or to use in violation of instructions furnished by us nor units which have been repaired or altered outside of our factory nor to cases where the serial number thereof has been removed defaced or changed This warranty is in lieu of all warranties expressed or implied and no representative or person is authorized to assume for us any other liability in connection with the sake ...

Page 20: ... LL DEMO D AGC AFT IF VCC 5V Z501 TRAP 4 5M Hz L501 VCO VO IL 49 48 CHRO MA LUMINANCE PROCESS HO RIZONTAL VERTICAL PRO CESS 46 44 ABL 13 VIDEO VE R VCC 5V 43 EXT V IN 42 X RAY 34 19 20 21 RED GREEN BLUE 1 2 3 200V C R T 9 8 7 6 I901 TDA6103Q HEATER HOR BUS VCC 25 H V FO CUS SCREEN AB L Hcp 133V VIDEO 200V HEATE R 10V 25 5V FBP 28 Q 401 HOR DR 27 Q 403 HOR O N OFF U COM 37 Q 402 HOR OUT B B C C B C...

Page 21: ...nto 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 M ust 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 NOTES...

Page 22: ...rtical DC bias using internal cross pattern S7 Vertical Size V SIZE 0 127 Align vertical amplitude using internal cross pattern S7 Vertical Linearity NO 0 31 Must be set to 16 Vertical S Correction V SC 0 0 31 Must be set to 6 No Sd Off YES Automatically turn off in 15min for no received signal 60 50 Hz 4 0 31 60 50 Hz 22 0 63 60 50 Hz 0 0 127 60 50 Hz 3 0 31 S7 Internal Black Display internal BLA...

Page 23: ...en 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 Select V POSI item adjust...

Page 24: ...ume down 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 14 BD 65 RB 105 G...

Page 25: ...ue to obtain norm al brightness level Press the DISPLAY button to memorize the data CONTRAST Fixed value 27 TINT Fixed value 35 COLOR Fixed value 25 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 26: ...2 VDD P84 AN4 P85 AN5 P86 AN6 P87 AN7 RES FILT CVIN VS HS R G B BL I P60 SDA0 P61 SCLK0 P62 SDA1 P63 SCLK1 P70 INT0 P71 INT1 P72 INT2 TOIN P73 INT3 TOIN P00 P01 P02 P03 P04 P05 P06 P07 TV ONLY H CABLE H NC NC BLUE BACK NC AUTO TINT NC KEY IN AFT IN AGC IN SPARE A D M DATA M CLOCK T DATA T CLOCK NC NC NC REMOCON IN ST BY H RF H AV L H OUT ON L OFF H NC AKB WHITE AUDIO MUTE H NC POWER ON H X TAL 32 ...

Page 27: ...nds of 16 x 32 dot characters 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 ...

Page 28: ...PLL IC Interface 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 ...

Page 29: ... 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 CM 003 1 Input Video TV O Low DC_0V Video High DC_5V TV 2 Reception Air Cable O Low DC_0V Air High DC_5V Cable 3 Audio Mono Stereo O Low DC_0V Stereo Hig...

Page 30: ... IC Description 6 Pin Description ...

Page 31: ... IC Description ...

Page 32: ... IC Description ...

Page 33: ... 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 34: ...01 POWER CONTROL MODULE PIN NO DESCRIPTION PIN NO DESCRIPTION 1 GATE DRIVE1 10 12V INPUT 2 OCP 11 POWER CONTROL 3 SOURCE 12 NC 4 GND1 13 GND2 5 GATE 14 133V INPUT 6 GATE DRIVE2 DPM 001 TI KSE 1 2 3 4 5 6 10 11 12 13 14 ...

Page 35: ...101 34 OCP TUNER 33V R820 DR TRNS B 45V SOUND B 12V R817 R818 D812 5 6Vz Q805 C706 ST BY 5V 133V Q801 FET S R809 R802 G R803 D L802 C805 R804 Check F801 125V 4A Check D801 PBS208GU Check R801 7W 2 2 Check Voltage Check Voltage Check Voltage Check Voltage 133V 14 FROM U COM 42 PW ON 0FF 11 Check Voltage FROM MICOM 42 PW ON H PW OFF L Check waveform DRAIN OF Q801 ST BY PW ON ...

Page 36: ...FT 27 28 SDA SCL I101 SF101 SAW FILTER 5 6 10 8 11 12 Check IF Vcc 5V Check clock data signal Check clock data signal 3 4 Check IF AGC voltage Check RF AGC voltage 46 44 Z501 4 5M Trap Check the waveform c I101 44 Z501 C525 Check composite video 18 Check RBG Vcc 9V 19 20 21 Check RBG signal output T402 FBT 13 Check ABL current 25 Check HOR BUS Vcc 5V 43 Check CHROMA VER Vcc 5V D405 Check 200V LINE...

Page 37: ...SDA SCL I101 SF101 SAW FILTER 5 6 10 8 11 12 Check IF Vcc 5V Check clock data signal 3 Check IF AGC voltage e I601 TDA7267A 1 4 f 52 54 Check SIF output signal If no signal then change I101 Check SIF input signal 9 5V Check FM filter circuit Check Vcc of the sound AMP R601 C602 SOUND 12V C603 Audio in Check audio signal in 2 C605 speaker Check audio signal out 3 Q601 Micom 40 Audio MUTE H Mute L N...

Page 38: ...I701 MICOM 11 12 29 30 T DATA T CLOCK 5V 33V IF OUT 14 AFT 27 28 SDA SCL g AGC IN X701 32 768KHz 10 ST BY 5V Check the crystal I703 EEPROM 8 ST BY 5V 5 6 SDA SCL Check SDA SCL Check 5V 33V LINE 15 C103 Check RF AGC Voltage Check AFT window Voltage SF101 SAW FILTER I101 11 12 10 4 RF AGC OUTPUT 49 48 L501 VCO COIL Check VCO coil 2 1V 2 5V ...

Page 39: ...19 20 21 RGB Vcc 9V Check the voltage R OUT G OUT B OUT Check R G B signal 43 Video Chroma Deflection Vcc Check the voltage X502 24 C507 C508 V RAMP ALC filter 5V Check the voltage 2 5V I301 LA7841 23 Vertical output 6 Vertical IC Vcc 25V Check the voltage 25V 5 Invert RAMP in 3 C307 Output Check vertical output signal Vertical D Y Check the waveform If no output then change I301 I101 ...

Page 40: ... REMOCON PREAMP ST BY 5V GND 34 OUT Check the waveform I701 MICOM X701 32 768KHz 10 11 12 ST BY 5V Check the crystal 24 25 SDA SCL I101 16 17 Check clock data signal 20 21 V SYNC IN H SYNC IN Check the signal 60Hz Check the signal 15 734Hz 23 22 OSD R OSD G OSD B BLANK 15 14 Check OSD R G B BLANK signal If OSD does not operate then change the I701 ...

Page 41: ...854939103 BUTTON ABS BK M561 48556136SS MARK BRAND SILVER ETCHING DIA CUTTIN M601 4856013301 SCREW CRT FIXING 30X140 YL M681 4856812001 TIE CABLE NYLON66 DA100 SP01A 7128301011 SCREW TAPPING T2S WAS 3X10 MFZN PTFMSJH427 MASK FRONT AS DTH 14V1FS M201 4852067201 MASK FRONT HIPS BK PTSPPWH407 SPEAKER AS DTQ 14J4FC PA601 4850703S50 CONNECTOR YH025 03 35098 ULW 200 SP01 4858314010 SPEAKER SP 5070F01 3W...

Page 42: ...3X11 TP C524 CEXF1H100V C ELECTRO 50V RSS 10MF 5X11 TP C525 CEXF1H109V C ELECTRO 50V RSS 1MF 5X11 TP LOC PART CODE PART NAME DESCRIPTION C526 CCZB1H681K C CERA 50V B 680PF K AXIAL C527 CCZB1H102K C CERA 50V B 1000PF K AXIAL C528 CCZB1H101K C CERA 50V B 100PF K AXIAL C529 CCZB1H101K C CERA 50V B 100PF K AXIAL C530 CXCH1H809D C CERA 50V CH 8PF D TAPPING C532 CCZF1H103Z C CERA 50V F 0 01MF Z C533 CZC...

Page 43: ...03 DIODE 1N4003 TAPPING D401 D1N4937G DIODE 1N4937G D405 D1N4937G DIODE 1N4937G D406 D1N4937G DIODE 1N4937G D407 D1N4937G DIODE 1N4937G LOC PART CODE PART NAME DESCRIPTION D408 D1N4937G DIODE 1N4937G D409 D1N4148 DIODE 1N4148 TAPPING D501 D1N4148 DIODE 1N4148 TAPPING D502 D1N4148 DIODE 1N4148 TAPPING D503 DUZ9R1BM DIODE ZENER UZ 9 1BM 9 1V D504 D1N4148 DIODE 1N4148 TAPPING D505 DUZ9R1BM DIODE ZENE...

Page 44: ...5C Y TAPPING LOC PART CODE PART NAME DESCRIPTION Q703 TKSC945CY TR KSC 945C Y TAPPING Q704 TKSA733CY TR KSA733CY TP Q801 PTR2SW4500 HEAT SINK ASS Y T2SK2671 7174300811 Q801 T2SK2671 FET 2SK2671 Q801A 4857024500 HEAT SINK AL EX B K Q801B 7174300811 SCREW TAPPTITE TT2 RND 3X8 MFZN Q804 TKSA1013Y TR KSA1013Y TP Q805 TKTC3205Y TR KTC3205Y TP Q807 TKSC945CY TR KSC 945C Y TAPPING QV01 TKSC945CY TR KSC 9...

Page 45: ...W 0 68 OHM J R602 RD 2Z621J R CARBON FILM 1 2 620 OHM J LOC PART CODE PART NAME DESCRIPTION R604 RD AZ752J R CARBON FILM 1 6 7 5K OHM J R605 RD 4Z392J R CARBON FILM 1 4 3 9K OHM J R606 RD AZ302J R CARBON FILM 1 6 3K OHM J R610 RD AZ472J R CARBON FILM 1 6 4 7K OHM J R611 RD AZ472J R CARBON FILM 1 6 4 7K OHM J R612 RD AZ472J R CARBON FILM 1 6 4 7K OHM J R613 RD AZ302J R CARBON FILM 1 6 3K OHM J R701...

Page 46: ...7K OHM J R902 RD AZ302J R CARBON FILM 1 6 3K OHM J R903 RD AZ272J R CARBON FILM 1 6 2 7K OHM J LOC PART CODE PART NAME DESCRIPTION R904 RD AZ222J R CARBON FILM 1 6 2 2K OHM J R905 RD AZ222J R CARBON FILM 1 6 2 2K OHM J R906 RD AZ222J R CARBON FILM 1 6 2 2K OHM J R910 RD 2Z152J R CARBON FILM 1 2 1 5K OHM J R911 RD 2Z152J R CARBON FILM 1 2 1 5K OHM J R912 RD 2Z152J R CARBON FILM 1 2 1 5K OHM J R913 ...

Page 47: ...ALL R452 R CARBON FILM RD 4Z103J 1 4 10K OHM J RD 4Z912J 1 4 9 1K OHM J RD 4Z912J 1 4 9 1K OHM J R503 R CARBON FILM RD AZ822J 1 6W 8 2K RD AZ752J 1 6W 7 5K RD AZ682J 1 6W 6 8K OHM J R807 R CARBON FILM RD AZ363J 1 6W 27K RD AZ273J 1 6W 27K RD AZ273J 1 6W 27K OHM J V01 COIL DY 58D0000082 ODY M1489 48A96420N1 ODY M2050 58D0000086 ODY L2144 V901 CRT BARE 48A96414NA A34JLL41X K 48A96420NB A48JLL41X 48A...

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