Rashin wutar lantarki ta TV: gano kai, gyarawa da gyara matsala

Wani fasali na musamman na gazawar wutar lantarki ta TV shine rashin cikakken aikin na’urar bayan haɗawa da hanyar sadarwa. A wannan yanayin, ba kawai sauti da hoton ba za su kasance ba, har ma da alamar aiki. Don gyara wutar lantarki na TV, dole ne ka fara yin ganewar asali na matsalar.

Bayyanar rashin aiki – yadda za a gano ɓarna na sashin TV

Duk abin da gazawar wutar lantarki, tabbas zai yi tasiri ga aikin TV. Alamu masu zuwa suna nuna lalacewa ga wannan sinadari:

• TV baya kunna
• hasken mai nuna alama yana kashe;
• ana jin sautin bugun bugun jini, yayin da TV din ba ya aiki, yayin da aka kunna na’urar kariya ta wutar lantarki (wannan kuma yana iya zama alamar gazawar hasken baya na LED).

Lokacin da aka kunna TV akai-akai tare da bayyanar daban-daban a cikin sauti ko hoto, waɗannan rikice-rikicen suna iya haifar da wani dalili na daban, ba ta hanyar lalacewar wutar lantarki ba. A lokaci guda, akwai wasu keɓancewa ga wannan ƙa’idar lokacin da matsalar da ta taso tana da alaƙa da wutar lantarki:

• mai nuna alama yana kunne, amma TV ɗin baya farawa;
• lokacin da ka danna maɓallin wuta akan na’urar kanta, TV ɗin baya farawa;
• da farko, kawai sauti ya bayyana, kuma kawai bayan wani lokaci – hoto;
• nuni na al’ada na hoto da sake kunna sauti suna bayyana ne kawai bayan kunnawa da kashe TV;
• akwai bayyanar ratsi , sautin baya, hoton da ya karye.

Manyan dalilan kasawa

Rashin wutar lantarki a gidajen Talabijin na LED na zamani na daya daga cikin matsalolin da suka fi yawa. Abubuwa da yawa na iya haifar da lalacewa, amma masana sun gano manyan dalilai guda 4:

1. Juyin wutar lantarki a cikin hanyar sadarwa (karɓar raguwar ƙarancin wutar lantarki ko ƙãra ƙarfin fitarwa). A sakamakon ci gaba da tsalle-tsalle irin ƙarfin lantarki, ba kawai aiki na TV tabarbare, amma bangaren sassa kuma zama mara amfani. Don kauce wa matsaloli saboda rashin ƙarfi irin ƙarfin lantarki, ana bada shawarar yin amfani da stabilizer.
2. Gajeren kewayawa . Yana iya haifar da ƙona abubuwa da yawa da sassan na’urar, gami da samar da wutar lantarki.
3. Mais fuse ya busa . Alamar jiran aiki za ta fara ba da rahoton wani abin da ya kone – ba zai yi haske ba.
4. Lalacewar Capacitor . Matsalar gama gari, musamman lokacin amfani da TV na dogon lokaci. Rigar capacitor yana da tasiri sosai ta wucin gadi fiye da abubuwan waje. Ana iya gane gazawar wannan kashi ta hanyar bincike na gani ta hanyar kumburin halayensa (ƙumburi).

Abubuwan da ke biyowa kuma suna taimakawa ga faruwar rashin aiki na wutar lantarki:

• rashin bin shawarwarin aiki;
• cin zarafin tsarin yanayi;
• kwance na’urar ba tare da gogewa da sanin na’urar ba.

Talabijan din baya jure wa canje-canje kwatsam a yanayin zafi da zafi. Bayan sayan shi a cikin hunturu kuma ya kawo shi cikin dakin mai zafi, kada ku kunna na’urar nan da nan don guje wa gurɓataccen ciki da lalacewa da wuri ga mahimman abubuwan.

Don gyaran kai na kayan aiki masu tsada, kana buƙatar samun ƙwarewar fasaha na asali da kayan aiki na musamman. Idan duk wannan babu, yana da kyau a tuntuɓi taron bitar nan da nan.

Bincike na wutar lantarki na TV kafin gyara

Don aiwatar da ingantaccen ganewar asali na gazawar samar da wutar lantarki, kuna buƙatar aiwatar da ayyuka da yawa.

Warkewar TV

Ƙayyade abin da ya haifar da matsala yana farawa tare da kwance na’urar. Don yin wannan, ana cire sukurori daga bayan TV don buɗe damar zuwa gefen wutar lantarki. A cikin nau’ikan TV daban-daban, kayan wutar lantarki suna samuwa ta hanyoyi daban-daban, don haka ba koyaushe zai yiwu a ga wannan kashi nan da nan bayan cire murfin ba. Idan kuna da irin wannan yanayin kawai, to ana iya samun damar yin amfani da wutar lantarki ta hanyar murfin kariya da aka yi da ƙarfe.

A wasu samfuran TV, ana iya shigar da ƙarin kariya musamman don wutar lantarki. Dangane da wannan, dole ne ku bi matakai da yawa na cire kullun da ke gyara sashin da ake so.

Sanin na’urar samar da wutar lantarki

Don yin ƙarin ayyuka, wajibi ne a fahimci a fili yadda sassan wutar lantarki na TV suke kama. Duk samfuran zamani ba su da wutar lantarki ɗaya, amma da yawa. Suna samuwa, a matsayin mai mulkin, a wuri guda – allon. Wannan allon yana da sauƙin bambanta da sauran: ban da capacitors da sauran abubuwan haɗin gwiwa, yana ɗauke da 3 black and yellow transformers. Wutar wutar lantarki ta TV ta ƙunshi abubuwa masu zuwa:

1. Wutar lantarki na jiran aiki . Babban aikinsa shine kiyaye TV a yanayin jiran aiki da jira umarni na gaba. Ana nuna wannan yanayin ta hanyar alamar LED mai haske. Don aiki na yau da kullun, dole ne a sami ƙarfin lantarki na 5V, wanda aka samar da wadatar da shi zuwa TV ta hanyar aikin aiki.
2. Toshe inverter . Babban aikin shine samar da wutar lantarki ga mai sarrafawa. Idan an keta wannan aikin, lokacin da kake ƙoƙarin kunna TV, za ku fuskanci sauyawa nan take zuwa yanayin barci. Wannan shi ne saboda gaskiyar cewa mai sarrafawa, ba tare da samun tabbacin aiki daga inverter ba, yana dakatar da kunna ƙarin ayyuka kuma ya koma yanayin jiran aiki.
3. PFC block . Babban aikin wannan bangaren shine don gyara yanayin wutar lantarki, wanda yake amsawa da aiki. Na farko wajibi ne don yin aiki na TV, a lokaci guda yana iya ƙara yawan amfani da wutar lantarki kuma yana rinjayar saurin lalacewa na capacitors, wanda ya shafi rayuwar wutar lantarki gaba ɗaya. Ƙarfin aiki yana yin aiki mai amfani, kuma ƙarfin amsawa yana canjawa zuwa kaya daga janareta da komawa zuwa janareta.

Muhimmi game da samar da wutar lantarki: https://youtu.be/vH8Nv1pZu8k An kwatanta na’urar samar da wutar lantarki ta TV da manyan abubuwan da ke tattare da shi a cikin wannan bidiyon: https://www.youtube.com/watch?v=p3YTt9Cb3Kk

Shirya matsala

Bayan sanin kanku da abubuwan da ke cikin na’urar, ci gaba da gano cutar. Yin amfani da mai gwadawa, kunna fitar da wutar lantarki ta jiran aiki – sakamakon ya zama 5V. Idan wutar lantarki bai kai wannan alamar ba ko kuma ba ya nan gaba ɗaya, matsalar ta fi yuwuwar gazawar capacitors. Don ƙayyade wannan, dubawa mai sauƙi na waɗannan sassa ya isa – za su zama convex. Abubuwan da suka fi rauni na kayan wutar lantarki na TV sun haɗa da capacitors na tacewa, waɗanda ke rasa kaddarorin su da sauri fiye da sauran. A wannan yanayin, abin da ya lalace ba koyaushe yana da lahani na bayyane ba. Rashin ƙarancin tacewa yana haifar da rashin aiki na samar da wutar lantarki, gazawar inverter, gazawar software a cikin microcircuits akan allo. Idan capacitors suna da kyau, duba fuse. Don wannan dalili, ana amfani da ƙararrawa, wanda zai gano kasancewar ko rashi na ɗan gajeren lokaci. Hakanan yakamata ku gwada allon daga gefen baya, wanda dole ne ku fara cire kashi daga firam ɗin. Bincika waɗannan sabani a kan resistors:

• duhu;
• fasa;
• matalauta sayar da ƙarshe;
• gibi tsakanin waƙoƙi.

Ana iya gwada wannan duka a gani, sannan a yanke shawarar yadda za a magance matsalar. Idan binciken bai nuna komai ba, duba masu tsayayya da multimeter. Za a nuna gazawar ta juriya.

umarnin mataki-mataki don gyara wutar lantarki ta TV

Kayan wutar lantarki na TV na zamani suna da, a matsayin mai mulkin, da’ira na yau da kullun. Bambance-bambancen da ke akwai sun sauko ne kawai ga girman kayan lantarki da ikon fitarwa. Dangane da wannan, bincike da gyare-gyare suna faruwa bisa ga wannan hanya. Yawan da’irar samar da wutar lantarki na talabijin na waje:

Abubuwan da ake buƙata da kayan aiki

Don gyare-gyare, ya kamata ku tara kayan aiki da kayan aiki, ba tare da wanda ba zai yiwu a kawar da rashin aiki da kyau ba:

• soldering baƙin ƙarfe tare da daidaitacce ikon;
• solder, barasa (mai ladabi man fetur), juyi;
• mai cire solder;
• screwdrivers a cikin wani saiti;
• masu yankan waya (masu yankan gefe);
• tweezers;
• mai gwadawa (multimeter);
• fitila 100 watts.

Fara gyaran wutar lantarki na TV, dole ne ku sami zane-zane na ƙirar a hannu (idan babu ɗaya, zaku iya saukar da shi akan Intanet akan gidan yanar gizon hukuma na masana’anta).

umarnin mataki-mataki don magance matsalar wutar lantarki

Ta hanyar bin tsarin makircin matsala, zaku iya ganowa da gyara babban lalacewar wutar lantarki ta TV:

1. Muna duba igiyar wuta, soket da / ko igiyar tsawo don lalacewa.
2. Muna kwance talabijin kuma muna sakin allon lantarki.
3. Muna duba allunan samar da wutar lantarki, muna nuna ko akwai masu kumbura, masu fashewa, da masu wuta.
4. Mun duba soldering, musamman soldering na lambobin sadarwa na bugun jini transformer.
5. Idan ba zai yiwu a iya gano ɓarnar ɓarna a gani ba, muna gwada fuses, diodes, transistor electrolytic da capacitors a jere. Duk da haka, yana yiwuwa a kafa rushewar kula da microcircuits kawai a kaikaice – lokacin da babu iko, kuma duk abubuwa masu hankali suna cikin tsari mai kyau. A aikace, yana faruwa cewa lokacin da tsarin wutar lantarki ba ya aiki, fuse ya kasance cikakke. Irin wannan yanayin na iya nuna matsala tare da transistor na babban injin bugun bugun jini.
6. Muna bincika, ba tare da siyarwa daga allon ba, ko akwai hutu a cikin juriya na ballast, ɗan gajeren kewaye na babban ƙarfin matattarar wutar lantarki, ƙonawa (rushewa) na diodes masu gyara.
7. Bayan gano abin da ya lalace, mun maye gurbinsa.
8. Idan an gano matsala lokacin da TV ɗin ya zafi, ana iya kawar da shi ta hanyar sanyaya gurɓataccen abu tare da auduga da aka tsoma cikin barasa ko acetone. Idan ba a san ko wane bangare ne sanadin ba, za a iya haifar da rashin aiki ta hanyar dumama ɗaya ko wani abu tare da baƙin ƙarfe.
9. Muna sake duba gyaran. Muna shigar da fitilar a wurin fuse, kunna TV a cikin hanyar sadarwa. Idan fitilar ta haskaka kuma ta fita, mai nuna alama yana kunne, ana iya ganin raster akan allon, abu na farko da muke yi shine auna wutar lantarki a kwance. Idan ya yi tsayi da yawa, bincika kuma maye gurbin masu ƙarfin lantarki. Ana lura da irin wannan hali a yayin da gazawar nau’i-nau’i na optocoupler.
10. Idan alamar ta yi shiru lokacin da hasken ya haskaka kuma ya fita, babu raster, wannan yana nuna matsala tare da fara janareta na bugun jini. Muna duba matakin ƙarfin lantarki a kan capacitor electrolytic na tace na ɓangaren ƙarfin lantarki. Idan ya nuna bai wuce 279 volts ba, muna neman dalilin a cikin fashe diodes na gadar gyara ko yayyowar capacitor. Idan babu wutar lantarki kwata-kwata, muna sake duba ma’aunin wutar lantarki. Hakanan kuna buƙatar gwada duk diodes na babban ƙarfin lantarki mai daidaitawa.
11. Tare da haske mai ƙarfi na fitilar, nan da nan cire haɗin TV daga cibiyar sadarwa. Muna sake gwada duk abubuwan lantarki.

Gyaran wutar lantarki ta Samsung UA32EH4003 TV: https://youtu.be/uGYd3hE8Zfw Yadda ake gane gazawar wutar lantarki ta TV mataki-mataki da yadda ake gyara wannan na’urar an bayyana shi a cikin wannan bidiyon horarwa: https://www.youtube.com/ watch?v =daXMYuZ1CXg Gyaran wutar lantarki ga Talabijan: https://youtu.be/yru9PNAKAkE Rashin wutar lantarki na daya daga cikin abubuwan da suka fi jawo gazawar TV. Jagoran ta hanyar umarnin mataki-mataki, zaku iya aiwatar da gyare-gyare da kanku. Idan babu isasshen aiki da ilimin ka’idar, yana da kyau a tuntuɓi kantin gyara nan da nan don guje wa matsaloli masu tsanani.