Los ntawm PCB ntiaj teb.

Seb nws yog pawg thawj coj los ntawm lwm tus lossis tus pcb board tsim thiab ua los ntawm koj tus kheej, thawj qhov kom tau txais nws yog los tshawb xyuas cov kev sib tw, kev voj voog luv luv, thiab kev sib nraus luv, thiab drilling. Yog tias lub rooj tsavxwm muaj txiaj ntsig zoo dua li nruj, tom qab ntawd koj tuaj yeem tshawb xyuas tus nqi tiv taus ntawm lub zog hluav taws xob thiab cov av xaim los ntawm txoj kev.

Nyob rau hauv ib txwm muaj xwm txheej, tus kheej tsim board yuav nruab cov txheej txheem tom qab kev ua tiav, thiab yog tias tib neeg ua, nws tsuas yog khoob phaj pcb board nrog lub qhov. Koj yuav tsum nruab cov khoom siv koj tus kheej thaum koj tau txais nws. Cov.

Qee tus neeg muaj cov ntaub ntawv ntau ntxiv ntsig txog PCB cov laug cam uas lawv tsim, yog li lawv nyiam sim tag nrho cov khoom ib zaug. Qhov tseeb, nws yog qhov zoo tshaj plaws los ua nws me ntsis.

PCB Circuit Coffic Board nyob rau hauv Debugging
Tus PCB PCB tshiab debugging tuaj yeem pib ntawm lub zog hluav taws xob. Txoj kev nyab xeeb tshaj plaws yog muab tso rau lub fuse thiab tom qab ntawd txuas lub zog hluav taws xob (tsuas yog nyob rau hauv rooj plaub, nws yog qhov zoo tshaj plaws los siv cov khoom siv ruaj khov).

Siv cov khoom siv hluav taws xob ruaj khov los teeb kev tiv thaiv overcurrent tam sim no, thiab tom qab ntawd maj mam nce cov voltage ntawm lub zog ruaj khov. Cov txheej txheem no yuav tsum soj ntsuam cov tswv yim tam sim no, cov lus qhia voltage thiab cov zis hluav taws xob ntawm pawg thawj coj saib.

Thaum lub voltage yog kho mus rau upwards, tsis muaj kev tiv thaiv dhau tam sim no thiab cov zis hluav taws xob yog ib txwm muaj, ces nws txhais tau tias lub zog hluav taws xob tsis muaj teeb meem. Yog tias cov zis siv hluav taws xob ib txwm muaj hluav taws xob lossis dhau-tam sim no tau dhau lawm, tom qab ntawd qhov ua txhaum yuav tsum raug tshuaj xyuas.

Cov Khoom Siv Hluav Taws Xob Hluav Taws Xob Hluav Taws Xob
Maj mam nruab cov modules thaum lub sijhawm debugging txheej txheem. Thaum txhua tus module lossis ntau tus modules tau muab ntsia, ua raws li cov txheej txheem saum toj saud, uas pab kom tsis txhob muaj qee qhov kev tsim tawm, lossis kev teeb tsa tsis raug, uas yuav ua rau muaj kev kub ntxhov dhau. Cheebtsam tsis zoo.

Yog tias tsis ua haujlwm thaum lub sijhawm ua tiav cov txheej txheem, cov hau kev hauv qab no feem ntau siv los daws teeb meem:

Kev daws teeb meem ib: voltage ntsuas txuj ci.

Thaum kev tiv thaiv dhau los tam sim no tshwm sim, tsis txhob maj disassble lub Cheebtsam, ua ntej lub zog hluav taws xob pin volt los saib seb nws puas nyob hauv ib txwm muaj. Tom qab ntawv xyuas qhov ntsuas hluav taws xob, kev ua haujlwm voltage, thiab lwm yam nyob rau hauv lem.

Piv txwv li, thaum cov silicon trentor tau qhib, tus voltage ntawm kev sib tshuam yuav nyob ib ncig 0.7v, thiab lub ce hlws feem ntau yuav yog 0.3v lossis tsawg dua.

Thaum kuaj, nws pom tias yuav tsum tau volfage yog siab dua 0.7v (tshwj xeeb trantors xws li darlington yog ua tau tias yuav tsum tau qhib. Ua ntu zus, tshawb xyuas qhov hluav taws xob ntawm txhua lub sijhawm kom tshem tawm qhov txhaum.

Kev daws teeb meem ob: Daim phiajcawv kev txhaj tshuaj

Lub teeb liab kev txhaj tshuaj yog qhov teeb meem ntau dua li ntsuas qhov ntsuas hluav taws xob. Thaum lub teeb liab pib xa mus rau qhov kev nkag rau lub davhlau ya nyob twg, peb yuav tsum ntsuas cov nthwv dej ntawm txhua qhov taw tes hauv lem kom pom qhov kev ua txhaum hauv cov kev txhaum.

Ntawm chav kawm, koj kuj tseem tuaj yeem siv tweezers los kuaj txog cov tswv yim davhlau ya nyob twg. Cov txheej txheem yog kom kov cov tswv yim lub davhlau ya nyob nrog tweezers, thiab tom qab ntawd saib cov lus teb ntawm lub tswv yim lub davhlau ya nyob twg. Feem ntau, cov qauv no yog siv nyob rau hauv cov ntaub ntawv ntawm audio thiab video circuitor thiab cov hluav taws xob kub tsis siv cov qauv no, nws yog ib qho kev sib tw hluav taws xob).

This method detects that the previous stage is normal and the next stage responds, so the fault is not on the next stage, but on the previous stage.

Kev daws teeb meem peb: lwm yam

Qhov saum toj no ob yog qhov yooj yim thiab ncaj qha txoj hauv kev. Ib qho ntxiv, piv txwv li, pom, hnov ​​tsw, mloog, thiab lwm yam, uas feem ntau hais tias, yog cov engineers uas xav tau qee qhov kev paub los kuaj teeb meem.

Feem ntau, "saib" tsis yog saib lub xeev ntawm cov cuab yeej sim, tab sis kom pom seb cov tsos puas yog ua tiav; "Ntsig" tsuas yog hais txog seb tsis muaj ntxhiab tsw zoo, xws li qhov tsis hnov ​​tsw, hluav taws xob, thiab lwm yam, nws yuav muab ib qho tsis hnov ​​tsw!

Thiab "mloog" yog qhov tseem ceeb los mloog seb puas muaj lub suab ntawm pawg thawj coj ua haujlwm li cas; Hais txog "kov", nws tsis yog kom kov seb cov khoom siv yog xoob, tab sis kom hnov ​​qhov kub ntawm cov tib leeg, nws yuav tsum txias rau hauv kev ua haujlwm. Cov Cheebtsam yog kub, tab sis cov khoom siv kub yog qhov tsis zoo. Tsis txhob pinch nws nrog koj txhais tes ncaj qha thaum kov cov txheej txheem los tiv thaiv kev txhais tes los ntawm kev kub hnyiab los ntawm qhov kub kub.