Yuav Ua Li Cas Kho Computer Monitor Switching Power Supply
Txuas lub hwj chim ntsaws ntawm cov zaub mus rau AC voltage regulator, tom qab ntawd kho qhov tso zis hluav taws xob ntawm qhov ntsuas hluav taws xob mus txog 100V, tom qab ntawd lub hwj chim rau kev saib xyuas, thiab maj mam nce lub zog hluav taws xob rau kev saib xyuas.
Piv txwv 1: Lub fuse raug hlawv tawm thaum lub tshuab qhib, thiab cov zis hluav taws xob yog xoom. Qhov xwm txheej no feem ntau yog tshwm sim los ntawm kev tawg ntawm lub raj hloov pauv thiab luv luv ntawm cov emitter thiab cov khoom sib sau. Lub sijhawm no, lub raj hloov pauv tuaj yeem raug tshem tawm ua ntej, thiab qhov kev tiv thaiv ntawm cov emitter thiab cov khoom ntim rau hauv av tuaj yeem ntsuas. Yog tias nws yog xoom lossis me me, nws tuaj yeem hloov tau. Tab sis nws tseem yuav tsum tau xyuas seb puas muaj teeb meem nrog lwm cov khoom ua ntej pib lub tshuab.
Fault example 2: Lub grating yog distorted nyob rau hauv ib tug "S" zoo. Qhov teeb meem zoo li no yuav tsum tsom mus rau kev kuaj xyuas lub lim dej thiab qhov hluav taws xob tswj hluav taws xob. Feem ntau, nws yog vim lub diode tawg, thiab tag nrho-yoj rectification ua ib nrab-yoj rectification. Qhov no kuj tuaj yeem tshwm sim los ntawm kev txo qis ntawm lub peev xwm lim capacitor.
Fault piv txwv 3: Lub AC 220V rectifier thiab lim circuit muaj qhov ua txhaum luv luv, thiab lub fuse raug hlawv thaum nws qhib. Ua ntej xyuas seb lub rectifier diode yog luv luv thiab seb lub lim capacitor puas tau tawg. Koj tuaj yeem tshem tawm lub degaussing coil, xyuas seb lub degaussing thermistor puas muaj qhov cuam tshuam luv luv, thiab hloov nws nrog ib qho tshiab yog tias muaj.
Fault piv txwv 4: Tsis muaj grating, tsis muaj zaub, thiab lub hwj chim qhia lub teeb tawm, tab sis lub fuse tsis hlawv. Lub sijhawm no, xyuas seb AC kev sib nrig sib inductance transformer puas yog qhib Circuit Court, seb qhov tam sim no limiting resistor ntawm lub rectifier Circuit Court yog qhib Circuit Court (kub tawm) tsis, los yog seb lub rectifier diode yog qhib Circuit Court.
Fault piv txwv 5: Tsis muaj grating, tsis muaj zaub, thiab muaj lub suab txawv txav hauv lub tshuab. Yog hais tias muaj lub suab "squeak", nws txhais tau hais tias lub oscillation zaus yog tsawg, thiab cov khoom muaj feem xyuam rau lub oscillation yuav tsum tau kuaj xyuas. Yog tias muaj lub suab "nias", nws txhais tau hais tias cov khoom siv hluav taws xob tiv thaiv dhau tam sim no, thiab kev tiv thaiv dhau tam sim no yuav tsum tau kuaj xyuas.
Fault piv txwv rau: Cov zis voltage siab dua los yog qis dua tus nqi ib txwm. Cov zis hluav taws xob ntau tshaj kaum volts mus rau kaum tawm volts siab dua lossis qis dua tus nqi ib txwm muaj, tab sis nws tsis yog xoom, thiab kev tiv thaiv Circuit Court tsis tau ua. Lub sijhawm no, qhov tshwm sim txhaum yuav txawv nrog qhov hloov pauv voltage. Koj tuaj yeem kho qhov voltage regulator potentiometer. Yog tias cov zis tseem tsis hloov lossis hloov pauv me ntsis, nws txhais tau hais tias qhov ntsuas qhov sib txawv ntawm lub amplifier Circuit Court yog faulty, thiab voltage regulator diode uas muab cov ntaub ntawv siv tau tawg los yog muaj feem ntau ntawm qhov luv luv Circuit Court.
