Kutadza kwemagetsi eTV: kuzvizivisa, kugadzirisa uye kugadzirisa matambudziko

Chinhu chakasiyana chekukundikana kwemagetsi eTV ndiko kusakwana kwekushanda kwechigadzirwa mushure mekubatanidza kune network. Muchiitiko ichi, kwete chete inzwi uye mufananidzo zvichange zvisipo, asiwo chiratidzo chebasa. Kuti ugadzirise magetsi eTV, unofanira kutanga waita chirwere chakakodzera chechinetso.

Kuratidzira kwekusashanda – nzira yekuziva kuparara kweiyo TV unit

Pasinei nekukundikana kwemagetsi, zvichakanganisa kushanda kweTV. Zviratidzo zvinotevera zvinoratidza kukanganisa kwechinhu ichi:

• TV haibatike
• chiratidzo chemwenje chakadzimwa;
• muridzo wepulse transformer inonzwika, nepo TV isingashande, sezvo chidziviriro chemagetsi chemagetsi chinoshandiswa (izvi zvinogonawo kuva chiratidzo chekukundikana kwe LED backlight).

Kana TV ikabatidzwa zvakajairika nekuratidzwa kwekutsauka kwakasiyana-siyana mukunzwika kana mufananidzo, kukanganisa uku kunonyanya kukonzerwa nechimwe chikonzero, uye kwete nekuparara kwemagetsi. Panguva imwecheteyo, pane zvimwe zvinosiya mutemo uyu kana dambudziko rakamuka rakabatana neimwe simba rekupa:

• chiratidzo chiripo, asi TV haina kutanga;
• paunodzvanya bhatani remagetsi pane mudziyo pachayo, TV haitangi;
• pakutanga, inzwi chete rinoonekwa, uye pashure penguva pfupi – mufananidzo;
• kuratidzwa kwakajairwa kwemufananidzo uye kuridza ruzha kunoonekwa chete mushure mekubatidza nekudzima TV kakawanda;
• pane chitarisiko chemitsetse , ruzha rwekumashure, mufananidzo wakaputsika.

Zvikonzero zvikuru zvekukundikana

Kukundikana kwemagetsi emagetsi emazuva ano LED TVs ndeimwe yezvinetso zvinowanzoitika. Zvinhu zvakawanda zvinogona kukuvadza, asi nyanzvi dzinoona zvikonzero zvina zvikuru:

1. Voltage fluctuations mune network (kugamuchira yakaderedzwa zvakanyanya kana yakawedzera goho voltage). Nekuda kwekugara uchisvetuka voltage, kwete chete kushanda kweTV kunowedzera, asi zvikamu zvechikamu zvinova zvisingagoneki. Kuti udzivise matambudziko nekuda kwemagetsi asina kugadzikana, zvinokurudzirwa kushandisa stabilizer.
2. Short circuit . Inogona kutungamirira mukupisa kwezvikamu zvakawanda uye zvikamu zvechigadzirwa, kusanganisira magetsi.
3. Fuse huru inofuridzwa . Chiratidzo chekumira chinotanga chekutaura chinhu chakatsva – hachizopenye.
4. Capacitor kukuvara . Dambudziko rinowanzoitika, kunyanya kana uchishandisa TV kwenguva yakareba. Kupfeka kwe capacitor kunokonzerwa zvakanyanya kwenguva pfupi kupfuura nekunze kwezvinhu. Kukundikana kwechinhu ichi kunogona kuzivikanwa nekuona kuongororwa nemaitiro ekuzvimba (bulge).

Izvi zvinotevera zvinopawo kuitika kwekutadza kushanda kwesimba remagetsi:

• kusatevedzera kurudziro yekushanda;
• kutyorwa kwemamiriro ekunze;
• disassembly yemudziyo usina ruzivo uye ruzivo rwechigadzirwa.

Iyo TV haibvumiri kuchinja kwakamwe kamwe mukupisa uye hunyoro. Kuzvitenga munguva yechando uye kuzviisa muimba inopisa, usabatidza chigadziro pakarepo kuti udzivise condensation mukati uye kukuvara kusati kwasvika kune zvakakosha zvikamu.

Kuti uzvigadzirise wega midziyo inodhura, unofanirwa kuve nehunyanzvi hunyanzvi hwekuita uye maturusi akakosha. Kana zvese izvi zvisipo, zviri nani kuti utaure nekukurumidza musangano.

Diagnostics yeTV magetsi asati agadziriswa

Kuti uite kuongororwa kwakakodzera kwekutadza kwemagetsi kutadza, unofanirwa kuita akati wandei nhanho zviito.

TV disassembly

Kuona chikonzero chedambudziko kunotanga nekubvisa mudziyo. Kuti uite izvi, screws haina kuvharwa kubva kumashure kweTV kuti ivhure kupinda kune simba divi. Mumhando dzakasiyana dzeTV, magetsi anowanikwa nenzira dzakasiyana, saka hazvigoneke nguva dzose kuona ichi chinhu mushure mekubvisa chivharo. Kana iwe uine nyaya yakadaro, saka kupinda kune magetsi kunowanzovharwa nevhavha yekudzivirira yakagadzirwa nesimbi.

Mune dzimwe mhando dzeTV, imwe dziviriro inogona kuiswa yakanangana nemagetsi. Panyaya iyi, iwe uchafanirwa kupfuura nematanho akati wandei ekusunungura screws inogadzirisa chikamu chaunoda.

Kujairira nemagetsi ekupa mudziyo

Kuti uite zvimwe zviito, zvinodikanwa kuti unzwisise zvakajeka kuti zvikamu zvemagetsi eTV zvinotaridzika sei. Zvose zvemazuva ano hazvina simba rimwe chete, asi akawanda. Ivo vari, sekutonga, munzvimbo imwe – bhodhi. Iri bhodhi riri nyore kusiyanisa kubva kune vamwe: kuwedzera kune capacitors uye zvimwe zvikamu, ine 3 dema uye yero transformers. Iyo TV magetsi inopihwa ine zvinotevera zvikamu:

1. Standby power supply . Basa rayo guru nderekuchengetedza TV iri mumodhi yekumira uye kumirira mirairo inotevera. Iyi modhi inoratidzwa neine lit LED chiratidzo. Pakushanda kwemazuva ose, panofanira kuva nemagetsi e5V, iyo iyo kuTV inopiwa nechinhu chebasa.
2. Inverter block . Basa guru nderekupa simba kune processor. Kana basa iri rikatyorwa, paunoyedza kubatidza TV, iwe uchaona shanduko yekukurumidza kuenda kumodhi yekurara. Izvi zvinokonzerwa nekuti iyo processor, isina kugashira kusimbiswa kwekushanda kubva kune inverter, inomisa activation yezvimwe zviito uye inodzokera kune yekumira mode.
3. PFC block . Basa guru rechikamu ichi ndechekugadzirisa simba rekuita, iro rinoshanda uye rinoshanda. Yokutanga inofanirwa kuti TV ishande, panguva imwechete inogona kuwedzera zvakanyanya kushandiswa kwesimba uye inokanganisa kukurumidza kupfeka kwema capacitors, izvo zvinokanganisa hupenyu hwemagetsi emagetsi ose. Simba rinoshanda rinoita chiito chinobatsira, uye reactive simba rinongoendesa kumutoro kubva kune jenareta uye kudzokera kune jenareta.

Zvakakosha nezvemagetsi emagetsi: https://youtu.be/vH8Nv1pZu8k Chishandiso cheTV magetsi uye zvikamu zvayo zvikuru zvinotsanangurwa muvhidhiyo iyi: https://www.youtube.com/watch?v=p3YTt9Cb3Kk

Kugadzirisa matambudziko

Mushure mekujairana nezvinoumba zvikamu zvemudziyo, enda kune kuongororwa kwayo. Uchishandisa tester, mhete kubuda kweiyo yekumira magetsi – mhedzisiro inofanira kunge iri 5V. Kana magetsi ari pasi pechiratidzo ichi kana kuti asipo zvachose, dambudziko rinonyanya kukundikana capacitors. Kuti uone izvi, kuongorora kuri nyore kwezvikamu izvi zvakakwana – ivo vachave convex. Zvikamu zvinonyanya kutambudzika zvemagetsi eTV zvinosanganisira mafirita capacitor, ayo anorasikirwa nemazita ezvivakwa nekukurumidza kupfuura mamwe. Muchiitiko ichi, chinhu chakakanganisika hachigari chine kukuvara kunooneka. Kusefa kwakashata kunotungamirira kusashanda kwesimba rekupa, kukundikana kwe inverter, kukundikana kwesoftware mu microcircuits pabhodhi. Kana ma capacitors ari OK, tarisa fuse. Nokuda kwechikonzero ichi, kurira kunoshandiswa, iyo ichaona kuvapo kana kusavapo kwechidimbu chechidimbu. Iwe unofanirwawo kuyedza bhodhi kubva kudivi rekuseri, iro raunofanirwa kutanga wabvisa chinhu kubva pafuremu. Tarisa kune zvinotevera kutsauka pane resistors:

• kusviba;
• mitswe;
• kushongedzwa kwakashata kwemhedziso;
• mikaha pakati pemakwara.

Zvose izvi zvinogona kuongororwa nemaziso, uye wozosarudza nzira yekugadzirisa dambudziko racho. Kana iyo yekuongorora isingaratidzi chinhu, tarisa maresitorendi ane multimeter. Kukanganisa kucharatidzwa ne zero kuramba.

Nhanho-ne-nhanho mirairo yekugadzirisa TV magetsi

Izvo magetsi emagetsi emazuva ano eTV ane, sekutonga, dunhu rinowanzoitika. Misiyano iripo inodzika chete kuhukuru hwezvikamu zvemagetsi uye simba rekubuda. Panyaya iyi, kuongororwa uye kugadzirisa kunoitika maererano nenzira imwechete. Magadzirirwo emagetsi emagetsi ekunze kweTV:

Zvishandiso zvinodiwa uye zvinhu

Kuti ugadzirise, unofanirwa kuunganidza maturusi uye zvigadzirwa, pasina izvo hazvizogoneke kubvisa kusashanda zvakanaka:

• soldering iron ine simba rinogadziriswa;
• solder, doro (yakanatswa peturu), flux;
• solder remover;
• screwdrivers mune imwe seti;
• wire cutters (side cutters);
• tweezers;
• tester (multimeter);
• rambi 100 watts.

Kutanga kugadziridzwa kwemagetsi eTV, iwe unofanirwa kuve uine dhizaini yemuenzaniso paruoko (pasipo imwe, unogona kuitora paInternet pane webhusaiti yepamutemo yemugadziri).

Nhanho-ne-nhanho mirairo yekugadzirisa dambudziko remagetsi

Nekutevera kutevedzana kwechirongwa chekugadzirisa matambudziko, unogona kuona nekugadzirisa kukuvara kukuru kune magetsi eTV:

1. Isu tinotarisa tambo yemagetsi, socket uye / kana tambo yekuwedzera yekukuvara.
2. Isu tinoparadzanisa TV uye tinosunungura bhodhi remagetsi.
3. Isu tinoongorora mabhodhi emagetsi emagetsi, tichiratidza kana kune macapacitor akazvimba, makesi anoputika, macharred resistors.
4. Isu tinotarisa kusungirirwa, kunyanya kusungirirwa kwevanoshamwaridzana nepulse transformer.
5. Kana zvaisaita kuona nekuona chinhu chakakanganisika, isu tinoedza sequentially fuse, diode, electrolytic transistors uye capacitors. Nekudaro, zvinokwanisika kumisikidza kuparara kwekudzora microcircuits chete zvisina kunanga – kana pasina simba, uye zvese discrete zvinhu zviri muhurongwa hwakanaka. Mukuita, zvinoitika kuti kana module yemagetsi isiri kushanda, fuse inoramba yakasimba. Mamiriro ezvinhu akadaro anogona kuratidza dambudziko ne transistor ye-high-frequency pulse generator.
6. Isu tinotarisa, pasina soldering kubva pabhodhi, kana pane kuputsa mu ballast kushorwa, pfupi pfupi ye-high-voltage filter capacitor, kupisa (kuparara) kwe rectifier diodes.
7. Taona chinhu chakakanganisika, tinochitsiva.
8. Kana kusashanda kuchionekwa kana TV ichipisa, inogona kubviswa nekutonhodza chinhu chakaremara nekotoni swab yakanyikwa mudoro kana acetone. Kana zvisingazivikanwe kuti ndeipi chikamu chakakonzera, kusashanda kunogona kutsamwiswa nekupisa chimwe kana chimwe chinhu nesimbi yekusimbisa.
9. Tiri kuongorora magadzirirwo acho. Isu tinoisa mwenje panzvimbo yefuse, vhura TV mune network. Kana mwenje uchivhenekera uye ukabuda, chiratidzo chiripo, raster inoonekwa pachiratidziri, chinhu chekutanga chatinoita kuyera yakachinjika scanning voltage. Kana yakanyanya kukwirira, tarisa uye tsiva iyo electrolytic capacitors. Maitiro akafanana anoonekwa pachiitiko chekukundikana kwe optocoupler pairs.
10. Kana iyo chiratidzo ichinyarara apo chiedza chinopenya uye chichibuda, hapana raster, izvi zvinoratidza dambudziko nekutanga pulse generator. Isu tinotarisa chiyero chemagetsi pane electrolytic capacitor yefirita yepamusoro-voltage chikamu. Kana ikaratidza kusadarika 279 volts, isu tiri kutsvaga chikonzero mune yakaputsika diode yebhiriji rectifier kana capacitor leakage. Kana pasina voltage zvachose, tinotarisa zvakare magetsi emagetsi. Iwe zvakare unofanirwa kuyedza ese diode eyakakwira voltage rectifier.
11. Nekupenya kwakasimba kwemwenje, pakarepo bvisa TV kubva kune network. Isu tinoedza zvese zvemagetsi zvinhu zvakare.

Samsung UA32EH4003 TV magetsi ekugadzirisa magetsi: https://youtu.be/uGYd3hE8Zfw Maitiro ekuongorora kutadza kwemagetsi eTV nhanho nhanho uye kugadzirisa mudziyo uyu zvinotsanangurwa muvhidhiyo iyi yekudzidzisa: https://www.youtube.com/ tarisa?v =daXMYuZ1CXg Kugadziriswa kwekushandura magetsi emagetsi eTV: https://youtu.be/yru9PNAKAkE Kukundikana kwemagetsi ndechimwe chezvikonzero zvinowanzokonzera kukanganisa kweTV. Kutungamirirwa nemirairo-nhanho-nhanho, iwe unogona kuita kugadzirisa iwe pachako. Mukusavapo kwekudzidzira kwakakwana uye ruzivo rwezvinyorwa, zviri nani kuti utaure pakarepo nechitoro chekugadzirisa kuti udzivise mamwe matambudziko akakomba.