Lub 9 common sense ntawmPCB HoobkasKev tshuaj xyuas Circuit Court board yog qhia raws li hauv qab no:
1. Nws yog txwv tsis pub siv cov cuab yeej siv hauv av kom 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, yees duab thiab lwm yam khoom siv yam tsis muaj lub hwj chim rho tawm transformer nrog cov twj paj nruag thiab cov khoom siv nrog cov ntaub ntawv hauv av.Txawm hais tias cov xov tooj cua dav dav hauv xov tooj cua muaj lub zog hloov hluav taws xob, 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 raug them. , txwv tsis pub nws yuav yooj yim heev Lub TV, suab thiab lwm yam khoom siv uas raug them nrog lub phaj hauv qab ua rau luv luv Circuit Court 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.Ground lub plhaub ntawm cov hlau soldering.Ceev faj nrog MOS Circuit Court.Nws muaj kev nyab xeeb dua los siv cov hluav taws xob qis hluav taws xob ntawm 6 ~ 8V.
3. Ua ntej kuaj lub rooj tsavxwm PCB, nkag siab txog cov ntsiab lus ua haujlwm ntawm kev sib xyaw ua ke thiab cov khoom sib txuas
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 lub rooj tsavxwm PCB
Thaum ntsuas qhov ntsuas hluav taws xob lossis ntsuas qhov ntsuas hluav taws xob nrog kev sojntsuam oscilloscope, tsis txhob ua rau luv luv ntawm cov pins ntawm lub voj voog sib txuas vim yog zawv zawg ntawm qhov kev xeem coj lossis kev sojntsuam, thiab ntsuas ntawm cov khoom siv hluav taws xob txuas ncaj qha rau cov pins.Txhua lub sijhawm luv luv tuaj yeem ua rau kev puas tsuaj rau kev sib txuas ua ke.Koj yuav tsum tau ceev faj ntau dua thaum kuaj lub tiaj-pob CMOS integrated circuits.
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 integrated circuit thaum kuaj PCB board
Lub hwj chim sib xyaw ua ke yuav tsum muaj cov cua kub zoo, thiab nws tsis raug tso cai ua haujlwm hauv lub xeev siab zog yam tsis muaj lub dab dej kub.
7. Cov hlau lead ntawm PCB pawg thawj coj saib yuav tsum tau kuaj kom tsim nyog
Yog tias koj xav tau ntxiv cov khoom siv sab nraud los hloov qhov puas ntawm cov khoom sib xyaw ua ke, cov khoom me me yuav tsum raug xaiv, thiab cov xaim yuav tsum tsim nyog kom tsis txhob muaj cov kab mob parasitic coupling, tshwj xeeb tshaj yog cov hauv av ntawm lub suab hluav taws xob amplifier integrated circuit thiab preamplifier circuit kawg. .
8. Txhawm rau tshuaj 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 yuav 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 ua tib zoo xyuas.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 qhib lub zog.
9. Tsis txhob txiav txim qhov kev puas tsuaj ntawm kev sib xyaw ua ke yooj yim thaum kuaj covPCB pawg thawj coj saib
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 hluav taws xob ntawm txhua tus pin txawv ntawm qhov qub voltage.Thaum cov nqi sib tw los yog nyob ze, nws yuav tsis yog ib txwm qhia tias kev sib xyaw ua ke zoo.Vim tias qee qhov ua txhaum cai yuav tsis ua rau muaj kev hloov pauv hauv DC voltage.
Tsev -Hais txog Hengxinyi -Circuit board zaub -Cov txheej txheem tsis ua haujlwm -Cov khoom ntws