Nws yog lub sijhawm rau pcb board tshuaj ntsuam xyuas rau qee cov ntsiab lus hauv kev txiav txim siab kom paub meej cov khoom zoo. Thaum kuaj xyuas cov niam roj PCB, peb yuav tsum them sai sai rau 9 lub tswv yim hauv qab no.
1. Nws yog nruj me ntsis txwv tsis pub siv cov cuab yeej ua haujlwm hauv av kom kov lub TV nyob hauv qab, video thiab lwm yam khoom siv hauv PCB Board
Nws yog nruj me ntsis txwv tsis pub siv TV ncaj qha, visi, video thiab lwm yam khoom siv uas tsis muaj lub zog sib cais nrog cov twj paj nruag thiab cov khoom siv nrog cov plhaub av. Txawm hais tias lub tshuab luam ntawv xov tooj cua dav hlau muaj lub zog siv hluav taws xob ntau, qhov tshwj xeeb yog cov khoom siv hluav taws xob, uas cuam tshuam rau cov khoom siv hluav taws xob, uas cuam tshuam rau cov khoom siv hluav taws xob, uas cuam tshuam rau cov khoom siv fais fab, ua rau muaj kev nthuav dav ntxiv ntawm qhov txhaum.
2. Ua tib zoo saib cov rwb thaiv tsev kev ua haujlwm ntawm cov hlau solding thaum kuaj tus PCB board
Nws tsis raug tso cai siv cov hlau solding rau soldering nrog lub zog. Nco ntsoov tias cov hlau sib dhos tsis raug them. Nws yog qhov zoo tshaj plaws rau hauv av lub plhaub ntawm cov hlau cam. Yuav tsum ceev faj ntxiv rau ntawm Mos Circuit. Nws muaj kev nyab xeeb dua los siv lub voltage tsis tshua muaj hlau hlau ntawm 6 ~ 8V.
3. Paub txog tus neeg ua hauj lwm cov cai ntawm kev sib xyaw ua ke thiab muaj feem sib thooj ua ntej kuaj cov laug cam PCB
Ua ntej kuaj xyuas Circuit Court, koj yuav tsum xub paub txog kev ua haujlwm ntawm CAM PIN, thiab cov hluav taws xob uas tseem ceeb ntawm cov kab ke ntawm Circuitalation. Yog hais tias cov xwm txheej saum toj no tau ntsib, kev soj ntsuam thiab tshuaj xyuas yuav yooj yim dua.
4. Tsis txhob ua rau muaj kev sib tw luv luv ntawm pins thaum kuaj tus PCB
Thaum ntsuas cov voltage lossis sim cov WaveForm nrog ib qho kev sojntsuam Oscrascope ntawm cov pins luv ntawm cov pins ntawm cov kev sib xyaw ua ke los ntawm kev ntsuas ua lossis probes. Nws yog qhov zoo tshaj plaws los ntsuas ntawm lub peripheral luam hluav taws xob sib txuas ncaj qha rau cov pins. Txhua lub sijhawm luv luv lub Circuitary tuaj yeem yooj yim kev puas tsuaj rau Circuit Court. Koj yuav tsum tau ceev faj ntau thaum kuaj cov tiaj-pob cmos sib xyaw ua ke.
5. Sab hauv kev tawm tsam ntawm PCB board qhov kev ntsuas ntsuas yuav tsum loj
Thaum ntsuas qhov ntsuas DC voltage ntawm cov IC pins, ib qho kev sib xyaw nrog lub taub hau sab hauv ntau dua 20kω / v yuav tsum tau siv qhov ntsuas loj rau qee qhov pins.
6. Ua tib zoo mloog rau cov cua sov dissipation ntawm lub zog sib xyaw ua ke thaum sim PCB cov laug cam
Lub zog hluav taws xob sib xyaw Circuit Court yuav tsum tsis txaus ua kom sov zoo, thiab nws tsis raug tso cai ua haujlwm hauv qab lub zog muaj zog yam tsis muaj lub dab dej siab.
7. Cov hlau ua hlau ntawm PCB Board yuav tsum tsim nyog
Yog tias koj xav tau ntxiv cov khoom sib txuas sab nraud los hloov qhov kev sib xyaw ua ke, thiab cov hluav taws xob me me kom tsis txhob muaj kev sib xyaw rau lub suab sib xyaw ua ke thiab cov ntaub qhwv hluav taws xob me me ua haujlwm hauv lub suab thiab cov ntaub qhwv hluav taws xob tsis tsim nyog sib xyaw ua ke ntev.
8. Txheeb xyuas tus PCB pawg thawj coj kom ntseeg tau tias lub vuam zoo
Thaum soldering, cov solder yog ruaj, thiab kev tsub zuj zuj ntawm cam thiab pores tuaj yeem yooj yim ua rau muaj kev sib tw yooj yim. Lub sijhawm soldering feem ntau tsis muaj ntau tshaj li 3 vib nas this, thiab lub zog ntawm cov hlau solding yuav tsum muaj txog 25w nrog rau cua sov sab hauv. Circuitity Circuit Court uas tau tsim cov khoom siv yuav tsum tau kuaj xyuas kom zoo. Nws yog qhov zoo tshaj plaws los siv Ohmmeter ntsuas seb puas muaj ib qho luv luv ntawm cov pins, lees tias tsis muaj cov khoom siv addhesion, thiab tom qab ntawd tig lub zog.
9. Tsis txhob yooj yim txiav txim siab qhov kev puas tsuaj ntawm COGCUCATED Circuitated thaum sim tus PCB Board
Tsis txhob txiav txim tias lub voj voog ua ke yog puas yooj yim. Vim tias cov kev sib xyaw ua ke tau ncaj qha rau kev hloov pauv ncaj qha, nws yuav ua rau muaj kev puas tsuaj ntau yam los ntawm kev ua kom sib xyaw Circuit Court. Ib qho ntxiv, hauv qee kis, ntsuas hluav taws xob ntawm txhua tus PIN yog txawv ntawm qhov sib txawv thaum cov nqi sib txawv lossis nws yuav tsis txhais tau tias kev sib xyaw Circuit Court yog qhov zoo. Vim tias qee qhov kev ua txhaum mos yuav tsis ua rau hloov pauv ntawm DC voltage.
PCB Pawg Thawj Coj Debugging Txoj Kev
Rau PCB pawg PCB tshiab uas nyuam qhuav rov qab los, peb yuav tsum xub pom cov teeb meem, thiab lwm yam yog tias tsim nyog los ntawm lub zog hluav taws xob thiab hauv av yog qhov loj txaus.
Rau cov board tshiab tsim qauv, debugging feem ntau ntsib qee qhov teeb meem, tshwj xeeb tshaj yog thaum lub rooj tsavxwm muaj ntau thiab muaj ntau cov khoom sib xyaw, nws feem ntau tsis tuaj yeem pib. Tab sis yog tias koj tsim tsa cov txheej txheem debugging tsim nyog, debugging yuav tau txais ob zaug tshwm sim nrog ib nrab ntawm kev siv zog.
PCB pab pawg debugging kauj ruam
1. Rau tus thib pcb board uas nyuam qhuav tau rov qab, peb yuav tsum xub pom cov teeb meem, thiab lwm yam yog tias tsim nyog los ntawm lub zog hluav taws xob thiab hauv av yog qhov loj txaus.
2. Tom qab ntawd cov khoom siv tau nruab. Independent modules, yog tias koj tsis paub tseeb tias lawv ua haujlwm zoo, tab sis rau nruab lawv txhua tus), yog li nws yooj yim los txiav txim siab qhov kev txhaum. Zam kev pib ua teeb meem thaum koj ntsib teeb meem.
Feem ntau hais lus, koj tuaj yeem nruab cov khoom siv hluav taws xob ua ntej, thiab tom qab ntawd lub zog rau kev xyuas seb cov zis hluav taws xob ntawm lub zog yog li qub. Yog tias koj tsis muaj kev ntseeg siab ntau thaum muaj kev cia siab thaum muaj kev cia siab (txawm hais tias koj paub meej tias koj ntxiv ib qho kev tswj hwm tau zoo nrog kev txwv tsis pub muaj nuj nqi.
Preset qhov kev tiv thaiv dhau los ua ntej, tom qab maj mam nce cov tswv yim tswj hwm lub zog, thiab saib xyuas cov tswv yim tam sim no, cov tswv yim voltage, thiab cov zis hluav taws xob. Yog tias tsis muaj kev tiv thaiv ntau dhau thiab lwm yam teeb meem thaum nce ntxiv, thiab cov zis hluav taws xob tau mus txog qhov qub, lub zog hluav taws xob yog ok. Txwv tsis pub, txiav lub hwj chim fais fab, nrhiav qhov txhaum plaub, thiab rov ua cov kauj ruam saum toj no kom txog thaum lub zog hluav taws xob ib txwm muaj.
3. Ntxiv mus, nruab lwm cov kev hloov maj mam. Txhua zaus ib lub sij hawm module yog nruab, lub zog rau thiab sim nws. Thaum muaj hwj chim rau, ua raws li cov txheej txheem saum toj saud kom zam dhau los ntawm cov qauv tsim thiab / lossis kev teeb tsa cov teeb meem thiab hlawv tawm cov khoom siv.
Txoj kev mus nrhiav qhov faulty pcb board
1. Nrhiav Faulty PCB Board los ntawm Kev Ntsuas Cov Qauv Hluav Taws Xob
Thawj qhov kom paub meej tias yog qhov voltage ntawm txhua lub zog lub zog pin yog ib txwm muaj, tom qab ntawd cov hauj lwm voltage ntawm txhua qhov taw tes yog qhov qub. Piv txwv li, thaum ib qho kev sib tshuam silicor yog muab rau, qhov kev sib tw hluav taws xob yog hais txog 0.7v, thaum lub CE kab hluav taws xob yog kwv yees li 0.3V lossis tsawg dua. Yog tias qhov kev sib tshuam hluav taws xob ntawm tus transistor yog ntau dua 0.7v (tshwj tsis yog rau dartringors tshwj xeeb, xws li darlington, thiab lwm yam) yuav qhib.
2. Daim teeb liab kev txhaj tshuaj mus nrhiav faulty pcb board
Ntxiv cov teeb liab rau cov tswv yim davhlau ya nyob twg, thiab tom qab ntawd ntsuas cov nthwv dej ntawm txhua qhov taw tes hauv lem kom pom yog tias nws yog ib txwm los nrhiav qhov txhaum cai. Qee zaum peb yuav siv cov qauv yooj yim dua, xws li tuav lub voj voog uas muaj hluav taws xob, tab sis ceevfe, txwv tsis pub nws yuav ua rau hluav taws xob hluav taws xob, txwv tsis pub nws yuav ua rau hluav taws xob ultrasonic). Yog tias tsis muaj lus teb rau qib dhau los, tab sis muaj lus teb rau qib tom ntej, nws txhais tau hais tias qhov teeb meem nyob hauv qib dhau los thiab yuav tsum tau tshuaj xyuas.
3. Lwm txoj hauv kev los nrhiav kev ua txhaum PCB cov laug cam
Muaj ntau lwm txoj hauv kev los nrhiav ua txhaum cov ntsiab lus, xws li saib, mloog, hnov ntxhiab, kov, thiab lwm yam.
"Pom" yog kom pom yog tias muaj cov tshuab ntsuas kev puas tsuaj rau cov khoom siv, xws li kev tawg, hlawv, cuam tshuam, thiab lwm yam;
"Mloog" yog mloog seb puas yog lub suab ua haujlwm yog ib txwm muaj, ib yam dab tsi uas yuav tsum tsis txhob nrov nrov, yog lub suab tsis txawv txav, thiab lwm yam.;
"Hnov tsw" yog tshuaj seb puas muaj ntxhiab tsw ntawm kev hlawv, thiab lwm yam.
"Kov" yog xeem seb qhov ntsuas kub ntawm lub cuab yeej yog ib txwm muaj, piv txwv li, txias heev.
Qee cov khoom siv hluav taws xob yuav ua kom sov thaum lawv ua haujlwm. Yog tias lawv txias rau kov, nws muaj peev xwm raug txiav txim tias lawv tsis ua haujlwm. Tab sis yog tias qhov chaw uas tsis yuav kub yog kub lossis qhov chaw uas yuav tsum yog kub kub heev, uas yuav tsis ua haujlwm. General zog transistors, voltage regulator chips, thiab lwm yam, ua haujlwm qis dua 70 degrees yog qhov zoo kiag li. Dab tsi yog lub tswvyim ntawm 70 degrees? Yog tias koj nias koj txhais tes, koj tuaj yeem tuav nws ntau dua peb vib nas this, nws txhais tau tias qhov kub qis dua 70 degrees (Nco ntsoov ua ntej, thiab tsis txhob hlawv koj txhais tes).