Kev nkag siab zoo thiab cov txheej txheem ntawm kev tshuaj xyuas PCB: saib, mloog, hnov tsw, kov….
1. Nws yog nruj me ntsis txwv tsis pub siv cov cuab yeej siv hauv av los kov lub TV nyob, suab, video thiab lwm yam khoom siv hauv qab phaj los kuaj PCB pawg thawj coj saib yam tsis muaj qhov hloov pauv hloov pauv.
Nws yog nruj me ntsis txwv tsis pub ncaj qha mus kuaj TV, suab, video thiab lwm yam khoom siv yam tsis muaj lub hwj chim cais transformer nrog cov twj paj nruag thiab cov khoom siv nrog cov plhaub hauv av.Txawm hais tias cov xov tooj cua dav dav thiab cov ntawv kaw lus muaj lub zog hloov pauv, thaum koj tuaj yeem ntsib nrog ntau lub TV tshwj xeeb lossis cov khoom siv suab, tshwj xeeb tshaj yog cov khoom siv hluav taws xob lossis cov khoom siv hluav taws xob siv, koj yuav tsum xub paub seb lub chassis ntawm lub tshuab puas yog. raug them, txwv tsis pub nws yog qhov yooj yim heev Lub TV, suab thiab lwm yam khoom siv uas tau them nrog lub phaj hauv qab ua rau lub zog luv luv ntawm cov khoom siv hluav taws xob, uas cuam tshuam rau kev sib xyaw ua ke, ua rau muaj kev cuam tshuam ntxiv ntawm qhov txhaum.
2. Ua tib zoo saib xyuas qhov kev ua tau zoo ntawm kev rwb thaiv tsev ntawm cov hlau soldering thaum kuaj PCB board
Nws tsis raug tso cai siv cov hlau soldering rau soldering nrog lub hwj chim.Xyuas kom tseeb tias cov hlau soldering tsis raug them.Nws yog qhov zoo tshaj rau av lub plhaub ntawm cov hlau soldering.Ceev faj ntxiv nrog rau MOS Circuit Court.Nws muaj kev nyab xeeb dua los siv cov hlau tsis tshua muaj hluav taws xob ntawm 6 ~ 8V.
3. Paub txog lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm kev sib xyaw ua ke thiab cov khoom siv sib txuas ua ntej kuaj PCB boards
Ua ntej yuav tshuaj xyuas thiab kho qhov sib xyaw ua ke, koj yuav tsum xub paub txog kev ua haujlwm ntawm kev siv hluav taws xob sib xyaw ua ke, kev siv hluav taws xob sab hauv, lub ntsiab hluav taws xob tsis zoo, lub luag haujlwm ntawm txhua tus pin, thiab qhov qub voltage ntawm tus pin, waveform thiab kev ua haujlwm. lub hauv paus ntsiab lus ntawm Circuit Court tsim ntawm peripheral Cheebtsam.Yog tias cov xwm txheej saum toj no tau ua tiav, kev tshuaj xyuas thiab tshuaj xyuas yuav yooj yim dua.
4. Tsis txhob ua rau luv luv ntawm cov pins thaum kuaj PCB
Thaum ntsuas qhov ntsuas hluav taws xob lossis ntsuas qhov nthwv dej nrog kev sojntsuam oscilloscope, tsis txhob ua rau luv luv ntawm cov pins ntawm cov khoom sib txuas vim yog zawv zawg ntawm qhov kev xeem coj lossis kev sojntsuam.Nws yog qhov zoo tshaj plaws los ntsuas ntawm peripheral luam tawm Circuit Court ncaj qha rau cov pins.Txhua lub sijhawm luv luv tuaj yeem ua rau lub voj voog sib xyaw ua ke tau yooj yim, yog li yuav tsum tau ceev faj ntxiv thaum kuaj lub tiaj-pob CMOS integrated circuit.
5. Kev tiv thaiv sab hauv ntawm PCB board kuaj ntsuas yuav tsum loj
Thaum ntsuas qhov hluav taws xob DC ntawm IC pins, ib lub ntsuas hluav taws xob nrog lub ntsuas hluav taws xob sab hauv ntawm lub taub hau ntawm lub ntsuas siab siab tshaj 20KΩ / V yuav tsum tau siv, txwv tsis pub yuav muaj qhov yuam kev loj rau qhov voltage ntawm qee tus pins.
6. Ua tib zoo saib xyuas cov cua kub dissipation ntawm lub hwj chim sib xyaw circuits thaum kuaj PCB boards
Lub zog hluav taws xob sib xyaw ua ke yuav tsum dissipate cua sov zoo, thiab nws tsis raug tso cai ua haujlwm hauv lub zog siab yam tsis muaj lub dab dej kub.
7. Cov hlau lead ntawm PCB pawg thawj coj saib yuav tsum tsim nyog
Yog tias koj xav tau ntxiv cov khoom siv sab nraud los hloov qhov puas ntawm qhov sib xyaw ua ke, cov khoom siv me me yuav tsum tau siv, thiab cov xaim yuav tsum tsim nyog kom tsis txhob muaj cov kab mob sib txuas tsis tsim nyog, tshwj xeeb tshaj yog cov hauv av ntawm lub suab hluav taws xob amplifier integrated circuit thiab preamplifier circuit kawg. .
8. Txheeb xyuas PCB pawg thawj coj saib kom ntseeg tau tias qhov vuam zoo
Thaum soldering, lub solder yog ruaj, thiab tsub zuj zuj ntawm solder thiab pores tau yooj yim ua rau cuav soldering.Lub sij hawm soldering feem ntau tsis pub tshaj 3 vib nas this, thiab lub zog ntawm cov hlau soldering yuav tsum yog li 25W nrog cov cua sov sab hauv.Cov kev sib xyaw ua ke uas tau raug soldered yuav tsum tau kuaj xyuas kom zoo.Nws yog qhov zoo tshaj plaws los siv lub ohmmeter los ntsuas seb puas muaj qhov luv luv ntawm cov pins, paub meej tias tsis muaj cov nplaum nplaum, thiab tom qab ntawd tig lub zog.
9. Tsis txhob yooj yim txiav txim siab qhov kev puas tsuaj ntawm kev sib koom ua ke thaum kuaj lub rooj tsav xwm PCB
Tsis txhob txiav txim siab tias qhov kev sib xyaw ua ke yog puas yooj yim.Vim tias feem ntau cov kab hluav taws xob sib xyaw ua ke ncaj qha, ib zaug ib lub voj voog txawv txav, nws yuav ua rau muaj ntau yam kev hloov pauv, thiab cov kev hloov no tsis tas yuav tshwm sim los ntawm kev puas tsuaj ntawm cov kev sib txuas.Tsis tas li ntawd, qee zaum, qhov ntsuas qhov ntsuas hluav taws xob ntawm txhua tus pin yog qhov sib txawv ntawm qhov qub Thaum qhov tseem ceeb sib tw lossis nyob ze, nws yuav tsis yog ib txwm txhais tau tias qhov sib xyaw ua ke zoo.Vim tias qee qhov ua txhaum cai yuav tsis ua rau muaj kev hloov pauv hauv DC voltage.
02
PCB board debugging txoj kev
Rau lub rooj tsavxwm PCB tshiab uas nyuam qhuav tau muab rov qab los, peb yuav tsum xub ua tib zoo saib seb puas muaj teeb meem ntawm lub rooj tsavxwm, xws li seb puas muaj cov kab nrib pleb, luv circuits, qhib circuits, thiab lwm yam. Yog tias tsim nyog, xyuas seb qhov kev tiv thaiv ntawm cov khoom puas. lub hwj chim mov thiab av yog loj txaus.
Rau lub rooj tsavxwm tsim tshiab, kev debugging feem ntau ntsib qee qhov teeb meem, tshwj xeeb tshaj yog thaum lub rooj tsavxwm loj thiab muaj ntau yam, nws feem ntau tsis tuaj yeem pib.Tab sis yog tias koj paub cov txheej txheem debugging tsim nyog, debugging yuav tau txais ob zaug qhov tshwm sim nrog ib nrab ntawm kev siv zog.
PCB board debugging cov kauj ruam:
1. Rau lub rooj tsavxwm PCB tshiab uas nyuam qhuav muab rov qab los, peb yuav tsum ua tib zoo saib seb puas muaj teeb meem ntawm lub rooj tsavxwm, xws li seb puas muaj cov kab nrib pleb, luv Circuit Court, qhib circuits, thiab lwm yam. Yog tias tsim nyog, koj tuaj yeem tshawb xyuas. seb qhov kev tiv thaiv ntawm lub hwj huam mov thiab hauv av loj txaus.
2. Tom qab ntawd cov khoom siv tau nruab.Independent modules, yog tias koj tsis paub meej tias lawv ua haujlwm zoo, nws yog qhov zoo tshaj kom tsis txhob nruab tag nrho cov ntawm lawv, tab sis nruab ib feem ntawm ib feem (rau cov circuits me me, koj tuaj yeem nruab lawv tag nrho ib zaug), kom nws yooj yim los txiav txim. qhov txhaum ntau.Thaum koj ntsib teeb meem, koj pib tsis tau.
Feem ntau hais lus, koj tuaj yeem nruab lub tshuab hluav taws xob ua ntej, thiab tom qab ntawd siv hluav taws xob los xyuas seb qhov tso zis hluav taws xob ntawm lub zog hluav taws xob puas zoo li qub.Yog tias koj tsis muaj kev ntseeg siab ntau thaum lub zog (txawm tias koj paub tseeb, nws raug nquahu kom koj ntxiv lub fuse, tsuas yog nyob rau hauv rooj plaub), xav txog kev siv cov khoom siv hluav taws xob kho tau nrog kev txwv tam sim no.
Preset lub overcurrent tiv thaiv tam sim no ua ntej, ces maj mam nce tus nqi voltage ntawm cov tswj fais fab mov, thiab saib xyuas cov input tam sim no, input voltage thiab output voltage.Yog tias tsis muaj kev tiv thaiv overcurrent thiab lwm yam teeb meem thaum lub sij hawm hloov kho, thiab cov zis hluav taws xob tau mus txog qhov qub, lub hwj huam mov yog OK.Txwv tsis pub, tshem tawm cov khoom siv hluav taws xob, nrhiav qhov yuam kev, thiab rov ua cov kauj ruam saum toj no kom txog thaum lub hwj huam mov zoo li qub.
3. Tom ntej no, nruab lwm cov modules maj mam.Txhua zaus ib qho module raug teeb tsa, lub hwj chim rau thiab sim nws.Thaum lub hwj chim rau, ua raws li cov kauj ruam saum toj no kom tsis txhob dhau tam sim no los ntawm kev tsim teeb meem thiab / lossis kev teeb tsa tsis raug thiab hlawv tawm cov khoom.