PTC: Indlela ukukhangela serviceability?

Kuninzi CRT TV kusetyenziswa inkqubo degaussing, nto leyo ihlanganiswe PTC. Indlela hlola kwisiphaluka kwimeko ngokusilela wedwa, kufuneka ukwazi, abanqwenela ukuqhuba ekulungiseni abo banabo. Isiqalelo uye iimpawu zomzimba Ungakhangela ohmmeter njengesiqhelo.

iipropati element

Kufuneka sihlolisise oko PTC kukuthi, ukuvavanya indlela kwikhonkco - iya kucaca kamva. Le element iyakwazi ukutshintsha iipropati kuxhomekeke lobushushu. ubuninzi emzimbeni kulinganiswa uxhathiso. Xa igumbi amaxabiso obushushu ohmmeter show units okanye amashumi ohms.

Xa itshiswe, umlo uqalisa ukutshintsha ngendlela enkulu. Iinqobo ohmmeter sele ukubonisa amakhulu iiponti, kwaye uthi urhulumente eqhelekileyo i element - a PTC sinesiphene. Indlela ukukhangela ukuba kukho urhano esekethe olungachananga? Iindlela zokusombulula le ngxaki siboniswa apha ngezantsi.

Ngenxa yayo PTC thermistors ezisetyenziswa kakhulu microelectronics ukulungiselela iinjongo ezahlukeneyo:

• circuit protection Power. Xa zisetyenziswa ngoku kumo element kunye nokumelana ukunyuka ukuya kuma, kukho nini na umda yangoku.
• KwiSekethe ukufudumeza. Ngenxa PTC thermistor iphunyezwa inkqubo yolawulo ukufudumeza oluzenzekelayo.
• Kwiisekethe cone obushushu.

Icebo ilungu engaphakathi

Resistor utshintsha ukuqina kwayo bubushushu, ngokunjalo PTC. Indlela ukukhangela into yokuqala? Ngala mazwi alula. amaxabiso Resistor ukutshintshatshintsha phakathi uluhlu encinane. PTC thermistor uyakwazi zivale ngokupheleleyo nokudluliswa yangoku ngalo njengoba temistor. wamva kuphela une lobudlelwano kwiqondo lobushushu.

Ukuze ukwazi ukuba batshekishe indlela serviceability ka PTC thermistor, kufuneka ichaze yokusebenza yayo engundoqo. Ezi ziquka:

• ukumelana emisiweyo lobushushu kokugquma (idla ngokuba yi kwiqondo 20-25);
• wayicima uxhathiso umiselwa kwindawo iimpawu yokuxhathisa ukuxhomekeka lobushushu, xa eyokuqala i parameter linyuke amaxesha 2 kuthelekiswa ixabiso eliyimali;
• voltage siphezulu ukwazi ukumelana element ngaphandle ukungaphumeleli;
• Amaxabiso ukulayisha yangoku: utshintshe nje ngegama, ukuba kunokwenzeka ubuninzi kwaye zinamandla; ukujonga ukuba ezi iparameters ebalulekileyo kuphela ukuba thermistor PTC isetyenziswa kwiisekethe eziphakamileyo-ngqo.

Element kwisekethe demagnetization

Indlela ukukhangela PTC on TV? Impendulo yalo mbuzo lulandelayo umgaqo osebenza ngayo. Nandzu isiqalelo umfanekiso ubugqwetha kuboniswa magnetization. Ukuphelisa le siphene screens uyilo igridi ezisetyenziswa series kunye PTC thermistor. Oku kuyilwa kuthiwa yomtya engaphandle, nesigubungelo yonke umphezulu lomkhusane evela ngaphakathi.

PTC isoloko itywiniwe screen yesekethe imaski leyo nzima yayo on-site lokuhlolwa. Phambi imilinganiselo kufuneka etywiniweyo-off ubuncinane ekupheleni grid. Eyona ndlela ilungileyo ibiya kuba utsalo ngokupheleleyo evela kumphathi wesekethe.

Ngokuba ukusetyenziswa eqhelekileyo i element okanye ibandla amagumbi ukufudumeza. Ukukhangela ngaphandle ukufudumeza lwangaphandle kufuneka ukuba bahlanganise idayagram yesekethe uze ukhethe uhlobo yokumakisha PTC. Uvela isixhobo abagcine uhambo data iseti element ekhoyo kunye lobushushu ahambelanayo.

Serviceability thermistor kungenziwa akhulule xa ukufudumeza igalelo. Ukuba uxhathiso kwandisa, ngoko yaxaka element. Noko ke, kule ngobuwena iya kuhlala amathuba neziphumo zovavanyo ngempazamo. Ngenxa yokuba izinto zeesekethe uxhathiso yahluka kunye ubudala, ekhokelela kozinzo umsebenzi ibandla.

Kutheni sifuna inkqubo in CRT?

Kumabonakude ngaphandle umfanekiso inkqubo degaussing uza igqwethekile kunye nempembelelo kancinane yasendle electromagnetic. It angakanani zonke izixhobo zombane, phezu komhlaba eqonda maza angabonakali.

Ekubeni yokukhulisa, izithethi ezinkulu, izinto zokufudumeza zidla zibekwe ecaleni TV. Ngaphandle screen umfanekiso isigqumathelo yayiza igqwethekile ngokusisigxina. Xa umsebenzi lokuqala aqukuqela PTC thermistor encinane ngoku hayi ebangela amalahle. Xa oku imaski luhlangabezana emzimbeni ntshikilelo evela entsimini.

Lo mhlaba otsalayo isicelo kwaye demagnetize imaski ngexesha wokuvulela i TV. Amaxesha amaninzi oku sikhatshwa isandi awunakufaniswa ngesibetho phezu gong. Ubukhulu kubungakanani bekhusi, kungona ingxolo yesandi. PTC thermistor kule ngongoma udlula eliphezulu-awo ngoku, ebangela ukuba shushu. Ukunyuka uxhathiso kwenzeka nezitshixo elementi wesekethe.

Iinketho tyala kwiityhubhu picture

Xa kuqala ivuliwe okanye umfanekiso egqwethekileyo kunye phamb waphawula bands, ngoko amathuba eliphezulu posistor unetyala. Indlela ukukhangela isiqalelo multimeter kwi chain? Kwi sekethe abandayo kulula ukwenza, kuba ukuxhathisa thermistor ukuya ubuncinane.

Amaxesha amaninzi nabo ngelotha nje ziwe yomsebenzi ixesha elide. PTC ibhekisa iziqalelo scheme, abo njalo sisebenzela ukwimeko eshushu. An ohmmeter check uqhagamshelo screen imaski kunye terminal wesibini imilenze thermistor. Ukuba ubuncinane, libonisa uqhagamshelo olukhuselekileyo. Mhlawumbi element ayisebenzi kwi cut-off.

Ukuba thermistor PTC ebese elifutshane circuited, okokuqala uvula fuse iphelelwe umbane. Kuxhomekeke ekubeni livela ngaphandle beesekethe kwacaca elifutshane umxokelelwane, khangela isiphoso unako ukukwenza ngokupheleleyo imaski screen kunye PTC.

Sakhi Iicooler chain

Ukuba akukho ngumsindo ngasemva kupholile - radiator, ngoko self-ukulungiswa kufuneka ukuba uqhelene ukuqinisekisa indlela PTC. Iifriji inokusetyenziswa iindidi 2 actuators: a PTC thermistors kunye baphinde kagesi. Inxalenye yokuqala amandla wachitha ukufudumeza ilahleko kwi element ukuxhathisa, wesibini ngaphantsi oluthembekileyo, kodwa hayi shushu.

Uninzi PTC e iifriji kufuneka abe ukungawi malunga 20-30 ohms. Xa urhulumente eshushu inokuba kilohms eziliqela. Ukuba amaxabiso kakhulu ngaphezulu kwe kubonisiwe, ngoko ke element kufuneka itshintshwe. Kubalulekile ukuba anike thermistor ukuze kuphole lobushushu igumbi phambi ngokomlinganiselo.