Yog tias lub TV poob, nws yog qhov zoo tshaj rau qhov kev tso cai kho kho rau cov kws tshaj lij. Tab sis yog tias koj paub yuav ua li cas rub lub tester (multimeter) thiab tuav cov hlau soldering hauv koj txhais tes, koj tuaj yeem sim kho lub cuab yeej TV hauv koj tus kheej.
Nws yog qhov tsim nyog
- - tester (multimeter);
- - ob 60-100 W incandescent teeb;
- - soldering hlau thiab cam;
- - hla cov ntsia hlau ntsia hlau;
Cov Lus Qhia
Kauj ruam 1
TV malfunctions tuaj yeem muaj qhov sib txawv heev. Yog tias nws tsis pom muaj cov cim ntawm lub neej thaum qhib, ua ntej saib xyuas qhov ntsuas hluav taws xob hauv lub qhov hluav taws xob. Yog tias muaj, rub tawm lub TV, tshem lub qab nraub qaum. Tom qab ntawd xyuas lub qaum fais fab thiab hloov. Thaum qhov hluav taws xob tau muab rau lub zog hluav taws xob, nws tuaj yeem suav tau tias nws ua haujlwm tsis zoo.
Kauj ruam 2
Saib ze ze ntawm lub fais fab mov ua ntej. Saib rau sab tsaus nti cov resistors thiab o lub zog loj. Tus ua hauj lwm capacitor muaj lub tiaj tiaj - yog tias nws o, nws tuaj yeem xav tias nws tau tawg. Tsis txhob hnov qab saib ntawm lub rooj tsavxwm tom qab. Tshawb xyuas qhov kev cuam tshuam ntawm cov ciav hlau, seb puas muaj cov seem puas ruaj khov. Yog tias lub hwj huam hluav taws xob tau ua haujlwm sab nraud, kuaj lub tshuab kab - nws yog qhov feem ntau thauj khoom, malfunctions hauv nws tshwm sim ntau zaus.
Kauj ruam 3
Thaum muaj kev soj ntsuam sab nraud ntawm lub TV ntsuas tsis tau tshaj tawm kev ua haujlwm tsis zoo, koj yuav tsum pib tshawb nrhiav nws los ntawm kev txheeb xyuas qhov ntsuas ntawm qhov ntsuas hluav taws xob. Txoj kev lom zem koj tsis muaj TV schematic, yog li nrhiav online. Raws li daim duab, txiav txim siab seb lub txuas twg ntawm lub zog txuas mus rau theem tav toj tsim tawm, thiab txiav nws (saib rau qhov ntsuas hluav taws xob ntawm 110-160 V). Hloov chaw, txuas lub teeb pom kev zoo incandescent nrog lub zog ntawm txog 100 watts.
Kauj ruam 4
Yog tias tsis muaj qhov txuas cais, nws yog qhov yuav tsum tsis txhob ua txhaum ib qho ntawm cov khoom ntawm kab hluav taws xob tawm ntawm qhov hluav taws xob no ntawm cov fais fab sib txuas thiab txuas lub teeb. Thaum koj tig lub hwj huam hluav taws xob rau thawj zaug, kuj txuas nws dhau lub teeb thib ob. Hauv qhov xwm txheej nws taws teeb ci ntsa iab, muaj kev ua haujlwm tsis zoo ntawm lub hwj huam hluav taws xob. Saib ntawm daim duab uas cov ntsiab lus ntawm chav ntsuas hluav taws xob tsis tuaj yeem ua txhaum (qhov cuam tshuam) thiab ncaj qha dhau tam sim no los ntawm lawv tus kheej mus rau lub teeb.
Kauj ruam 5
Qhov xwm txheej thaum lub teeb tsa thiab tam sim ntawd tawm mus los yog lub ntsej muag tsis muaj zog, qhia qhov kev pabcuam ntawm cov hluav taws xob nkag ntawm cov hluav taws xob. Lub teeb ntawm lub qhov rooj tuaj yeem muab tua thiab cov tshev txuas ntxiv tuaj yeem nqa tawm yam tsis muaj nws.
Kauj ruam 6
Pib ntsuas lub zog mov los ntawm kev ntsuas qhov ntsuas hluav taws xob hla lub nra (teeb txuas). Saib hauv daim duab qhia pom dab tsi voltage yuav tsum muaj. Nws tuaj yeem qhia tau ob qho tib si rau ntawm lub tshuab xa hluav taws xob thiab ntawm cov khoom sib tw. Qhov muab cov mov hluav taws xob tuaj yeem qhia nyob rau ntawm qhov tawm ntawm qhov pib thawj ntawm lub kab hluav taws xob. Nws yuav tsum nyob nruab nrab 110-150V, nyob ntawm seb qhov loj ntawm lub TV npo.
Kauj Ruam 7
Yog hais tias qhov hluav taws xob muaj qhov siab dua, nyob hauv thaj av ntawm 200 V, kuaj xyuas cov khoom ntawm thawj ntu ntawm pawg hluav taws xob fais fab lub luag haujlwm rau nws tsim. Them nyiaj tshwj xeeb rau cov electrolytic capacitors. Ib qho kev pabcuam sab nraud, tab sis tus qub capacitor yuav muaj qhov tsis muaj peev xwm, uas ua rau muaj qhov nce ntawm qhov tso tawm voltage. Thaum qis qis, koj yuav tsum kuaj xyuas cov hluav taws xob theem ob ntawm lub zog txuas. Ua tib zoo saib xyuas lub capacitors thiab diodes hauv kev ua haujlwm ntawm kab rov tav thiab ntsug fais fab.
Kauj ruam 8
Yog tias txhua qhov hluav taws xob muaj tseeb, qhov ua haujlwm tsis zoo yuav tsum raug ntsia rau lwm qhov ntawm lub TV. Ua ntej tshaj plaws, hauv kab scan.
