Yuam kev thiab kev tivthaiv tsis ua haujlwm yog qhov tseeb ntawm lub neej. Circuit boards yuav ua nrog rau kev ua yuam kev hauv lawv, cov khoom yuav tsum tau muab tso rau sab nraub qaum los yog nyob rau qhov chaw tsis raug cai, thiab tej yam khoom tsis zoo rau txhua yam uas yuav ua haujlwm tsis zoo los sis tsis ua txhua yam. PCB troubleshooting yuav yog ib qho hauj lwm hauv kev ua haujlwm uas se ob lub siab thiab lub siab. Luckily muaj ob peb lub tswv yim thiab cov tswv yim uas tuaj yeem ua kom qhov kev tshawb fawb rau qhov teeb meem 'feature.'
PCB Txhaws
Cov ntawv cog lus Circuit Court Circuits, los yog PCBs, yog cov kab ntau ntawm cov tshuab insulators thiab tooj liab uas txuas nrog cov khoom ntim sib txuas ua ke los tsim ib lub voj voog niaj hnub. Kev daws cov teeb meem PCB ntau zaus yog qhov kev sib tw, nrog rau qhov tseem ceeb xws li qhov loj me, cov txheej, cov teeb cauj teeb meem, thiab hom kev ua si ua lub luag haujlwm loj hauv qhov yooj yim ntawm kev txhim kho. Qee cov teeb meem loj dua yuav tau siv cov cuab yeej tshwj xeeb kom txhim kho qhov teeb meem, tab sis feem ntau cov teeb meem yuav ua tau nrog cov khoom siv hluav taws xob kom ua raws cov cim, cov dej, thiab kev teeb tsa los ntawm qhov Circuit Court.
Cov Cuab Yeej Rau PCB Txhaum Cai
Feem ntau cov teeb meem PCB teeb meem yuav ua tau nrog ob peb yam khoom. Cov twj siv ntau yam muaj txiaj ntsig yog ib lub thaij (multimeter), tab sis nyob ntawm qhov tsis yooj yim ntawm PCBs thiab qhov teeb meem, lub LCR meter, oscilloscope, lub hwjchim thiab cov ntsiab lus logic kuj yuav tsum tau khawb qhov tob rau hauv qhov kev coj ua haujlwm ntawm Circuit Court.
Pom Kev Pom Kev Pom Zoo
Kev soj ntsuam ntawm PCBs tuaj yeem nrhiav tau ntau yam teeb meem. Overlapped traces, burnt tawm Cheebtsam, cov cim qhia ntawm overheating, thiab sab nrauv yam tsis muaj peev xwm nrhiav tau yooj yim los ntawm kev soj ntsuam txhua yam. Qee cov hlawv cov hlawv, puas ntsoog los ntawm ntau qhov tam sim no, tsis tuaj yeem pom yooj yim, tab sis ib qho kev tshuaj ntsuam xyuas qhov tob lossis qhov tsis hnov tsw tuaj yeem qhia tias muaj cov khoom puas. Cheeb cajdej yog lwm qhov qhia tau zoo ntawm qhov teeb meem, tshwj xeeb tshaj yog rau cov neeg tawm lub cev tawm .
Kev Tshawb Xyuas Lub Cev
Ib kauj ruam tshaj li qhov kev kuaj xyuas pom kev yog qhov kuaj xyuas lub cev nrog lub hwj chim siv rau hauv Circuit Court. Los ntawm kev sib txuas ntawm lub PCB thiab cov khoom nyob rau ntawm lub rooj tsavxwm, yuav pom cov pob kub kub tsis tas siv lub koob yees duab kim thermographic. Thaum twg cov tshuaj tiv thaiv kub lawm, nws tuaj yeem ua kom txias nrog cov cua hauv koos poom los kuaj cov haujlwm hauv lub voj voog uas muaj kev tivthaiv ntawm qis dua. Cov txheej txheem no yog qhov txaus ntshai thiab yuav tsum tsuas yog siv rau qhov tsis tshua muaj hluav taws xob nrog cov kev nyab xeeb kom zoo.
Thaum lub cev sib txuas ib qho hluav taws xob, yuav tsum tau ceev faj ntau. Nco ntsoov tias tsuas yog ib qho kev sib txuas ua ke nrog lub Circuit Court txhua lub sijhawm. Qhov no tiv thaiv ib qho hluav taws xob poob siab los ntawm kev mus ncig thoob lub plawv, qhov ua rau neeg tuag taus. Khaws ib txhais tes hauv koj lub hnab ris yog ib qho txheej txheem zoo thaum ua haujlwm ntawm circuits nyob hauv los tiv thaiv tau cov kev phem no. Xyuas kom tag nrho cov kev muaj zog tam sim no mus rau hauv av, xws li koj txhais ko taw los yog cov plhaub av tsis zoo, tsis raug kaw yog qhov tseem ceeb los txo qhov kev nyab xeeb ntawm kev poob ntsej muag.
Txuas ntau qhov ntawm Circuit Court kuj yuav hloov qhov impedance ntawm Circuit Court uas hloov tau tus cwj pwm ntawm qhov system thiab siv tau los txheeb xyuas qhov chaw nyob hauv Circuit Court uas xav tau kev pabcuam ntxiv rau kev ua haujlwm.
Kev Tshawb Fawb Sib Tshooj
Feem ntau cov tswv yim zoo tshaj plaws rau PCB troubleshooting yog los kuaj txhua tus neeg. Kev kuaj txhua tus resistor, capacitor, diode, transistor, inductor, MOSFET, LED, thiab cov khoom ua tsis zoo sib txawv yuav ua tau nrog ib lub thev xaib lossis LCR meter. Cheebtsam uas muaj tsawg dua los yog sib npaug ntawm cov nqi kev tivthaiv, tus tivthaiv feem ntau zoo, tabsis yog tias qhov kev tivthaiv nqi siab dua nws yog qhov qhia tau tias qhov kev tivthaiv tsis zoo lossis qhov sib dhos sib dhos tsis zoo. Diodes thiab transistors tuaj yeem tshawb xyuas qhov ntsuas ntawm qhov ntsuas ntawm ib lub thij duab. Lub hauv paus-emitter (BE) thiab cov chaw sau khoom (base-collector) (BC) ntawm cov khoom siv transistor yuav tsum coj zoo li cov diodes thiab kev coj ua ib txoj kev tsuas yog nrog tib lub qhov poob siab. Nodal tsom xam yog lwm txoj kev uas tso cai rau kev xeem tsis sib haum ntawm cov cheebtsam los ntawm kev siv lub hwjchim rau ib qho kev tivthaiv thiab ntsuas nws cov lus teb tam sim no (V / I).
ICs kev xeem
Cov khoom nyuaj tshaj plaws yog xyuas ICs. Feem ntau ICs tuaj yeem yooj yim txheeb tau los ntawm lawv cov cim thiab ntau tau kev sim siv cov oscilloscopes thiab logic analyzers, tiam sis tus naj npawb ntawm specials ICs nyob rau hauv ntau yam configurations thiab PCB designs yuav ua rau ICs nyuaj heev. Feem ntau cov txheej txheem tseem ceeb yog sib piv tus cwj pwm ntawm Circuit Court mus rau ib qho zoo hauv Circuit Court, uas yuav tsum pab tus cwj pwm kev coj cwj pwm kom sawv tawm.