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The Philippine Electronics and Technology Forum > Electrical and Electronics Repair > Analog and Mixed Signal Device Repair (Electronics Technician Forum) (Moderator: dickgs) > DaewooCTV model:DTQ-20V1N. No power
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Author Topic: DaewooCTV model:DTQ-20V1N. No power  (Read 3125 times)
emj_e2
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« on: July 24, 2008, 10:17:49 AM »
Marhay n aldaw sir. From bikol dn po ako nd im new here. Amateur tech w/ no formal training or edu in electronics. My bangungot ako n tv d2. Hope you can help or others out there. DaewooCTV model:DTQ-20V1N. No power kc shorted MA8920. pnalitan ko pti fuse- ayaw mg start nd no stand by. Ng short pa avalanche diode n 130v s my secondary filter cap n 100uf160v. Pinalitan ko R2KY ngk stand-by. Pg on ko- nkg hi-vo pro ng shutdown pro my B+ lge n 135v. Ala nko mkitang sira. Pg nk hang ang yoke- dretso andar. My sond nd ng li2pat ang ch. Pinalitan k ibang yoke n ok- ng shut down prin. Pg nk float ang anode cap- same result. Shutdown prin. Sna mbuo ko to with your help sir. Thanks.
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emj_e2
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« on: July 24, 2008, 10:17:49 AM »
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jhamir
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« Reply #1 on: July 25, 2008, 11:52:29 PM »
check mo sa schematics ang normal na voltage ng b+ mo...  check vert. section... posible hold down yan... ..kya di tumuloy ang oscillation...remember... ung b+ ha...?   gudluck
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dampulay na.......
emj_e2
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« Reply #2 on: July 31, 2008, 10:44:34 AM »
Thank you very much sir Jhamir. 135V nman B+. Na try ko na ring e float ang vert IC. Hold down pa rin. Testingan ko kya ng new vert IC. Na bubuang na tlaga ako d2. Hanap mna ako diagram. Mraming salamat uli sir Jhamir.
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emj_e2
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« Reply #3 on: October 19, 2008, 06:07:00 PM »
oo ntry mo palitan yung v out ic.sabay mo na rin yung boster cap ng vert para mas sure. gud luck..
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dickgs
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« Reply #4 on: February 28, 2009, 06:06:03 PM »
emj_e2, try this link... Good Luck. ^_^

http://www.mediafire.com/file/dmznjnnthzy/DT Q13V5FC.pdf
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emj_e2
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« Reply #5 on: April 01, 2009, 10:43:02 AM »
Quote from: tdh7700 on October 19, 2008, 06:07:00 PM
oo ntry mo palitan yung v out ic.sabay mo na rin yung boster cap ng vert para mas sure. gud luck..
thanks sir tdh7700. actually matagal ko ng na release yang daewoo na yan. nag pa back-up ako ky chief mel pg dating galing manila kasi madalas siya import mag repair. at the time na tanggap ko ung daewoo wala siya dito sa bikol. shutdown circuit pala trouble- me inalis na diode. hindi tinuro sakin kasi ayaw nyang mg spoon feeding ako. ok lang. he's a very good friend of mine.:-)
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emj_e2
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« Reply #6 on: September 26, 2009, 12:21:31 AM »
mga sir... please help me nman sa daewoo tv e2 din kc prob ng tv ko. naopen ung resistor sa my 160v na caps papunta sa 133v ng flyback at ung zener nya ay shorted. tnry ko alisin ung zener ngkastandby na kaso nung pinalitan ko ng bago ganun pa rin ayaw pa rin mag-on.
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emj_e2
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« Reply #7 on: September 26, 2009, 09:51:31 PM »
same model ba ito ng tv mo sir? wag ka basta-basta mag-alis ng zener diode. baka mas lumala sira ng tv mo. controller din ng boltahe ang mga zener- pg inalis mo yan merong sisibakin ang sobrang boltahe. hindi pko ng try nyan. pna bagage ko nlang kasi asar na me ari. suyurin mo maigi mula power supply. Smiley
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emj_e2
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« Reply #8 on: September 26, 2009, 10:12:50 PM »
pki dagdagan mo na din info. model#, parts ng power supply K2671/, MA8920/DPM133/PC817. tagal ko na ring nag aantay mka tanggap uli ng ganitong modelo. Smiley
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emj_e2
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« Reply #9 on: September 27, 2009, 07:22:10 PM »
ganun ba sir... DaewooCTV model:DTQ-20V1N ung regulator nya ay MA8920. Akala ko nga ung ic ang prob pero nung tinanggal ko ung zener ngkastandby na. hindi ko pa nasubukan i-float ung vert ic at ung yoke. shorted kc ung zener at naopen ung resistor nya ung papuntang flyback ung line ng 133v.
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emj_e2
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« Reply #10 on: September 28, 2009, 02:00:33 PM »
tumaas siguro supply kya bumigay yung resistor. ano pala value ng zener diode na ng short? ilan ba nasusukat mong B+? check mo din mga resistor sa paligid ng MA8920- yung nasa mega ohms, minsan ng over-value din yan kaya dapat palitan. Smiley
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emj_e2
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« Reply #11 on: October 16, 2009, 10:16:24 PM »
share ko lng po sa mga bagohan kagaya ko
TCL... vertical lines sa taas.. replace 0.22, 16 volts mylar..
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« Reply #12 on: October 10, 2010, 12:34:09 AM »
merong shorted parts sa hor section napaka simpleng trouble lang yan!paki post naaman ng regulator part no. tsaka FBT part no.!
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enriz622
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« Reply #13 on: October 11, 2010, 06:52:43 AM »
bangkay na to ah
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tahah14
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« Reply #14 on: October 11, 2010, 07:11:36 AM »
ahehe oo nga now master kung dmu cnabi dkuman lang napancn     

DaewooCTV model:DTQ-20V1N. No power
« on: July 24, 2008, 10:17:49 AM »
ahaha have a nice day ahead! Smiley
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Smiley
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« Reply #15 on: October 11, 2010, 12:54:58 PM »
kumusta ang set mo kabayan ok na ba?
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