1. Mhaka unhu uye dzigadziridzwe capacitance kuti maindasitiri kudzora redunhu bhodhi
Kukundikana kukuvara capacitance ndiyo-soro mune zvemagetsi, kunyanya panyaya electrolytic capacitance.
The capacitance kukundikana anoratidzwa sezvinotevera: 1.The kugona iri diki; 2. Total kurasikirwa vanokwanisa; 3. The leakage; 4. A pfupi redunhu.
Capacitors kutamba wakasiyana basa redunhu, uye kukundikana tiri characterized.In kuti maindasitiri kuzvidzora akadhindwa redunhu bhodhi, Ivo-digital wedunhu bhodhi iri vakawanda, capacitor inoshandiswa kuita simba Sefa, chiratidzo coupling uye capacitance pamusoro oscillator redunhu vari less.If ari electrolytic capacitor rinoshandiswa nokuchinja simba nerubatsiro wakaremara, kuti nokuchinja simba zvitengeswa gona irege vibrating, uye hakuna voltage output.Or goho voltage mupise hakuna kunaka, dunhu nokuda voltage kusagadzikana uye musoro nenyonganyonga, chokupika muchina kushanda maawa kana havagoni kuzarura muchina, kana capacitor uye digitaalinen vematunhu bhodhi simba nerubatsiro pakati zvakanaka uye kunaka, chokupika pakati above.This riri simba kunyanya pedyo kombiyuta motherboard, vakawanda kushandisa kombiyuta rinowanika dzimwe nguva hazvigoni kuzarura muchina kwemakore akawanda chiitiko kuti dzimwe nguva Anovhura, svinudzai nyaya, vanowanzova electrolytic capacitor urove Fani kunogona kuonekwa, kana capacitor pasi kuyera vanokwanisa kuwana dererei zvikuru pane chaiko ukoshi.
Upenyu capacitor wakabatana ambient tembiricha zvakananga. The kumusoro tembiricha kwezvakatipoteredza, mupfupi iri capacitor life.This kutonga kwete bedzi inoshanda electrolytic capacitors asiwo vamwe capacitors.Therefore, ari kutsvaka kukundikana capacitance, zvinokosha kuona capacitance riri yakati pedyo kupisa bhuku, dzakadai capacitance kubudikidza kurutivi redhiyeta uye yakakwirira nesimba vakaungana zvinoriumba. The pedyo nayo, kwakondiko inofanira damaged.Have kunge pakugadzira mumwe X-ray chinanga detector simba nemushonga, vanoshandisa dzinoratidza utsi akabuda kubva pasimba romugove, svinudzai nyaya Vasvika ane 1000 uF / 350 vs. capacitor guru ane jikichira zvinhu panze, kubvarura akazaruka kuburuka chokukura wezviuru chete mashomanana uF, vakaonawo kuti chete capacitance pamusoro rectifier zambuko uye kupisa kunyura pedyo, mumwe kubva kure ndiyo yakasimba, vanokwanisa riri normal.In Uyezve, pane dunhu pfupi iri capacitance of China Chip, uye zvakare anowana kuti capacitor riri pedyo kudziyisa parts.Therefore, zvinofanira pfungwa kana kutsvaka yokuzvigadzirisa.
Vamwe capacitive leakage zvakakomba zvikuru, nomunwe kubatwa anogona kunyange kupisa pamusoro capacitor mhando iyi anofanira kuchinja.
Kana zvakanaka uye zvakaipa breakdowns, vakawanda mhosva ndiye kukundikana capacitance damage.So panguva kukundikana kwakadaro, capacitance zvinogona kiyi kuongorora, pashure shanduko capacitance kazhinji haashamisi (Chokwadi uyewo vanofanira kuteerera unhu of capacitance, sarudza pezvitsiga nani, akadai aiti rubhi, dema nedhaimani nezvimwewo).
2. Zvinoitwa nekusarurwa kukuvara nemishonga
Resistors ndivo kupfuura dzakawanda zvinoriumba mune magetsi, asi kwete kupfuura zvakakuvadza kukuvara components.Resistance ndiyo inonyanya nzira kuvhura mugwagwa, uye kurwisa hariwanikwi uye kurwisa iri rare.Common chaizvo kabhoni firimu nemishonga, simbi firimu nemishonga, waya ronda nemishonga uye resistance.The inishuwarenzi rinonyanya pamberi zviviri kurwisa, kuti hunhu waro kukuvadzwa chinhu yakaderera nemishonga (pazasi 100 Ω) uye hwaikosha (anopfuura 100 K Ω) kukuvara zvazvingava kwakakwirira, zvenguva nemishonga (akadai mashomanana zana kune makumi ezviuru European) shoma kukuvara; wechipiri ndechokuti nemishonga yakaderera nemishonga iri kazhinji rakaitwa marasha uye dema, uye zviri nyore kuwana kuti pane mavanga shoma kana nemishonga mukuru nemishonga iri damaged.Wire ronda nemishonga iri aiwanzoshandiswa sezvo hombe muganhu aibuda kuitika, uye kurwisa haisi large.Some ari cylindrical waya inogona ndichisvibiswa kana pamusoro rikavapo makatsemuka kana kwete marks.Cement nemishonga rudzi waya wou rhodesia nemishonga, izvo zvinogona kutyora kana kupiswa, zvimwe hapana kuonekwa trace.When inishuwarenzi nemishonga anopisa, vamwe hukawanika acharidza wakasimudza chimedu ganda, zvimwe iyo isina zvisaririra, asi handingatongogumburwi blackened.According kusvika pamusoro unhu, kana kuongorora nemishonga, inogona pfungwa, akakurumidza kuona ukama nemishonga.
Maererano zvechadenga pamusoro apa, tinogona kutanga kutarisa yakaderera nemishonga tsika chero zviratidzo ndichisvibiswa pamusoro akadhindwa redunhu pamapuranga , uye ipapo maererano kukuvara oruzhinji rakazaruka kana kukosha kukura uye nyore kuparadza unhu dzakakwirira nemishonga tsika, tinogona kushandisa multimeter zvakananga vhoriyamu mukuru chaizvo resistances ari pcb redunhu mapuranga ari mativi ose kurwisa zviri kuramba, kana uwandu kurwisa mukuru chezita kukosha, ndiye kurwisa anofanira kukuvaradzwa (teererai kuti, zvakadai akatsiga nemishonga akaratidza chete pashure kumhedziso, nekuti anogona shunt capacitance mu redunhu zvinoriumba, pane mutariri zvinoyerera muitiro), kana uwandu kurwisa idukusa chezita kukosha, iwe kazhinji hazvidi kuifuratira. Ndizvo here kuyera ose resistor pamusoro rakadhindwa redunhu bhodhi pcb, kunyange kana "chakaipa" chiuru, hazvizovi mumwe kurega.
3.the Kukoshesa nzira yacho operative gudzazwi
Operational gudzazwi kuti discriminant kuti wandei yemagetsi Nokuraramisa ane zvimwe dambudziko, kwete chete ukuru nemagariro ukama, tariro izvozvo kuchakubatsira kukurukura ichi newe.
The akanaka operative gudzazwi ane hunhu "rakapotsa pfupi" uye "rakapotsa zororo". unhu maviri izvi zvinobatsira chaizvo kuti ongorora chokufambisa kutenderera Linear application.In kuti nechokwadi Linear chikumbiro, chokufambisa anofanira kushanda pasi namahwindo loop (kunaka inofambiswa) .If hapana akaipa inofambiswa, noruvazhe loop amplification ari comparator.If ari mudziyo ichizotongwa, zvinofanira kujeka kana mudziyo unoshandiswa sechinhu gudzazwi kana kuva comparator mudunhu.
Hazvinei hworudzii gudzazwi, pane inofambiswa resistor RF, zvino kana isu vagadzire dzinokwanisa kumisa inofambiswa kuramba mumugwagwa kubva magetsi, achishandisa multimeter kuongorora goho uye kuderedza mazano, kuti kurwisa pakati kana guru, akadai zvakawanda pane mashoma M Ω, ipapo tinogona kuva nechokwadi kuti mudziyo rinofanira kunge kuita zvakawanda nokuti, kana mutengo 0 Ω kuti dzakawanda zviduku, k Ω, ndiko kuti aone kana nemishonga pakati goho uye kuderedza mazano, gudzazwi kushandisa mashoko achaita.
Maererano nheyo chaivo gudzazwi pfupi, kureva, kana operative gudzazwi kushanda zvakanaka, zvakafanana kwezvavakaisa harungashandurwi voltage pakati mazano vachava vakaenzana, kunyange zvazvo pane misiyano uyewo mv pamwero Chokwadi, mune zvimwe yakakwirira chiyamuro impedance redunhu multimeters nemishonga richava shoma simba pamusoro voltage bvunzo, asi kazhinji haana kupfuura 0.2 V, kana musiyano anopfuura 0.5 V, kuti gudzazwi hapana mubvunzo zvakaipa!
Kana mudziyo unoshandiswa sechinhu comparer zvinoita chete kuva akasiyana mazano chinouraya uye neizvi chiyamuro inouraya. The voltage zvakafanana voltage pakatarisana>, uye goho voltage riri pedyo kunonyanyisa kukosha positive.The chete voltage ndiye neizvi voltage, uye goho voltage riri pedyo 0V kana akaipa kunonyanyisa (zvichienderana Dual simba kana simba chete) .If ari kuonekwa voltage asingadi kusangana mutemo uyu, ipapo mudziyo richakanganisika! Saka hauna kushandisa kuzvitsinhanisa nzira, haufaniri kuputsa chip fari pamusoro akadhindwa redunhu bhodhikuti mutongi chokupika yacho gudzazwi.
4. A duku Wandinyengedzerei yokuedza SMT zvinoumba ari multimeter
Vamwe chigamba chaikosha zvikuru duku, kushandisa vanhuwo multimeter matanga uye bvunzo Nokuraramisa haisi chaizvo nyore, zvingangoita kuti dunhu pfupi, wechipiri nokuda Coated pamwe kuputira unhani pamusoro Pin bhodhi kuzvuzvungudza achipinda neVadzidzi chezvinonhuwira zvikamu zvesimbi. heino imwe nzira nyore kukupa zvakawanda zvimunakire.
Tora zvidimbu zviviri shoma nhamba tsono, maindasitiri Nokuraramisa technology (udzamu) pamwe multimeter zvakasimba uye ozokwira zvakawanda wakanaka mhangura waya iri waya, ane yakaisvonaka mhangura waya matanga uye tsono uye akasungwa pamwe chete, reoccupy solder weld.With akadaro duku muromo matanga uye kuyera SMT vaungana hurongwa apo pasina pfupi redunhu puranga, uye anogona kuona anobaya kuputira unhani, kutora kiyi chinzvimbo, havafaniri angazvinetserei vadzime mashoko Kamudzira membrane.
5. Repair nzira redunhu bhodhi paruzhinji simba pfupi
Akadhindwa redunhu bhodhi nazvo, kana ukasangana pfupi-redunhu mhosva pachena simba romugove kazhinji wokutanga guru, nekuti mano mazhinji vari kuitawo zvakafanana simba nerubatsiro, mumwe mudziyo ari nokuchinja simba nerubatsiro, pane fungidziro mudunhu pfupi, kana ndiro chinhu hachisi zvikuru, vanotevedzera nzira "badza nyika" zvichaita pfupi-redunhu pfungwa dzinogona kuwanikwa, kana akawandisa smt zvinoriumba, aigona "badza nyika" nebadza kuti mamiriro ezvinhu achavaponesa luck.In kurumbidzwaka uku hubudirire nzira, kushandisa nzira iyi, kaviri basa, kazhinji vanogona kukurumidza kuwana pfungwa kukundikana.
Kuti tive voltage kuitika zvose chinjika simba nemushonga, voltage 0-30v, ano 0-3a, simba iri wedzerai hakusi zvinodhura, 300RMB kana so.Will rakazaruka wedunhu voltage kuti mudziyo simba romugove voltage pamwero, ano kutanga shoma, achiwedzera voltage mudunhu simba romugove voltage 5 vs. pfungwa dzakadai 74 akatevedzana machipisi, uye 0 vs. divi, zvichienderana mwero remudunhu pfupi, magazini kuwedzera zvishoma nezvishoma, noruoko kubatwa mudziyo, kana kubatwa kune mumwe mudziyo kudziyisa Zviripachena, izvi kazhinji zvakakuvadza smd zvinoriumba, anogona kubviswa zvimwe kusimbisa measurement.Of Chokwadi voltage haafaniri kupfuudza nokushanda voltage ari mudziyo, uye haigoni chokuita pakaunda, zvikasadaro uchapisa zvimwe zvakanaka mano.
6.a chipfudziso duku, kugadzirisa dambudziko guru
More uye zvikuru wakashandiswa maindasitiri kuzvidzora akadhindwa redunhu mapuranga PCB , nzira dzakawanda bhodhi munwe goridhe iri akaiswa mukati slots. Nokuda zvakaipa maindasitiri kwezvakatipoteredza, guruva, mwando, kungatikanganisa gasi zvakatipoteredza unobereka murombo kuonana kukundikana nyore kuti kadhi, yakawanda neshamwari kungava nzira yokugadzirisa dambudziko nokuchinja inowanikwa kadhi, asi mari titenge kadhi riri wandei chaizvo, kunyanya vamwe kupinza kwemashoko card.In chokwadi, imi aigonawo kushandisa chokudzimisa kutsakatisa kakati ndarama munwe, kuchenesa tsvina iri ndarama munwe, wozoedza zvakare, pamwe kugadzirisa dambudziko! nzira iri nyore uye inoshanda.
7.The kuongorora zvakaipa nemagetsi zvikanganiso munguva dzakanaka
Ose nguva yakanaka uye yakaipa nemagetsi kukundikana zvingasanganisira zvinotevera ezvinhu:
1. Poor nevateereri
Bad kuonana slots, womukati pakakuvara waya, zvakaipa kuonana kuti waya chivhariso uye chinouraya, uye rakapotsa nomoto yenhengo, etc.
2. chiratidzo akashatiriswa
For digitaalinen mumatunhu, panyaya zvimwe zvinhu, zviri mhosva aripo, dai ari kunyanya kukanganiswa kukanganisa kudzora mamiriro kuti zvakaipa, vanewo redunhu bhodhi chinoumba parameters kana munhu uchitikurudzira kuita parameters zvakachinja, ari Anti-chipingaidzo mano kune tipping pfungwa, saka kukundikana;
3. chafariz kugadzikana yenhengo hakuna kunaka
Kubva vazhinji nazvo tsika, kuti chafariz kutsiga rokutanga electrolytic capacitor hakuna kunaka, vakatevera vamwe capacitors, triode, diodes, IC, nemishonga, etc.
4. Pane unyoro uye guruva redunhu bhodhi
unyoro uye guruva kuchaita kuitisa magetsi, pamwe nemishonga Chaizvoizvo, asiwo nedanho kupisa bilges inotonhora vanodzokera kurwisa kuchaita Dzinochinjawo, mugumisiro kurwisa pamwe nemamwe masangano ari zvakafanana, maratidzirwo hwakasimba apo anogona kushandura redunhu parameters, kuti kukundikana;
5.Software ruchibatanidzwawo
Vakawanda parameters anoshandiswa aitenderera kuchinja software, kwomugove zvimwe parameters pamusoro zvakare pasi, ari dzinonetsa siyana, kana muchina oparesheni kuteerera-software mhosva chikonzero, ipapo aramu ngapaonekwe.
8. Sei nokukurumidza kuwana zvakamisa hurongwa ruzivo?
Modern zvemagetsi kuri multifarious, zvichioma akasiyana-siyana zvinoriumba, zviuru, mu redunhu pcb nazvo, kunyanya maindasitiri akadhindwa redunhu bhodhi Nokuraramisa nzvimbo, vazhinji zvakamisa hurongwa harioneki, kana kunyange kumbozvinzwa, kunyange kana vamwe zvinoumba mashoko ari wakakwana, bhodhi muruoko asi kuverenga mashoko ari kombiyuta kuongorora, kana kwete kukurumidza kutsvaka nzira, kwerunyararo kushanda ari kuenda kutengesa panzvimbo dhisikaundi kwazvo, maindasitiri yemagetsi kugadzira munda, kushanda zvakanaka imari, saka kusarudza pcb zvakanaka kana pcb Assembly nokutengesa kunokosha zvikuru, ndinoda kuti varumbidze King-PCB.com kwamuri.