一、 Iyo capacitance ye LED yekuratidzira yedunhu bhodhi yakakuvadzwa
Iko kutadza kunokonzerwa nekukuvadzwa kwecapacitor ndiko kwakanyanya mumidziyo yemagetsi, kunyanya kukuvadzwa kwe electrolytic capacitor.Capacitor kukanganisa kunoratidzwa se: 1. kuderedza simba;2. Kurasikirwa kwakakwana kwesimba;3. Leakage;4. Short circuit.
二、 Resistance kukuvara
Zvakajairika kuona vazhinji vanotanga vachikwenya nevanopikisa pavanenge vachigadzira mabhodhi edunhu, kungave kuputsa kana kubatanidza.Muchokwadi, nekumwe kugadzirisa, chero iwe uchinzwisisa maitiro ekukuvadza evanopikisa, haufanirwe kunetseka zvakanyanya.Resistance ndiyo yakanyanya kuwanda mumidziyo yemagetsi, asi haisi iyo chikamu chine yakanyanya kukuvadza mwero.Resistance kukuvara kunowanzoitika mumaseketi akavhurika, nekuwedzera kwekupokana kuri kushoma uye kuderera kwemaitiro kushoma.Mhando dzakajairika dzinosanganisira kabhoni firimu resistors, simbi firimu resistors, waya ronda resistors, uye fuse resistors.Tinogona kutanga tacherechedza kana paine zviratidzo zvekupisa dema pane yakaderera kushorwa pabhodhi redunhu.Zvichienderana nehunhu hwemaseketi mazhinji akavhurika kana kuwedzera kushorwa kana kushorwa kwakuvadzwa, pamwe nekatsika kekupikiswa kwepamusoro kukuvara nyore, tinogona kushandisa multimeter kuyera zvakananga kukosha kwekupokana pamigumo yese yekupikisa kwepamusoro. bhodhi redunhu.Kana iyo yakayerwa yekudzivirira kukosha yakakura kupfuura yezita rekupokana kukosha, Kana kushorwa kwakanyatso kukuvara (inofanirwa kucherechedzwa kumirira kusvika kukosha kwekupokana kwaratidza kugadzikana kusati kwaita mhedziso, sezvo panogona kunge paine yekuchaja uye yekuburitsa nzira yakafanana necapacitor. zvikamu mudunhu), kana iyo yakayerwa kukosha kukosha idiki pane yezita rekupokana kukosha, inowanzo furatirwa.Nenzira iyi, dhizaini yega yega pabhodhi redunhu inoyerwa kamwe chete, uye kunyangwe ukauraya chiuru netsaona, hauzopotsa imwe resistor.
三、 Nzira yeKutonga Hunhu hweKushanda Amplifiers
Amplifiers ane maitiro e "virtual short" uye "virtual break", ayo anobatsira zvakanyanya pakuongorora mutsara wekuita basa remasekete.Kuve nechokwadi chekushandisa mutsara, iyo inoshanda amplifier inofanirwa kushanda yakavharika loop (negative mhinduro).Kana pasina mhinduro isina kunaka, iyo amplifier inoshanda pasi pekuvhura-loop amplification inova muenzanisi.Kana iwe uchida kutonga kunaka kwechigadzirwa, iwe unofanirwa kutanga wasiyanisa kana mudziyo unoshandiswa seamplifier kana muenzanisi mudunhu.Zvinoenderana nemusimboti weamplifier virtual ipfupi, kureva kuti, kana iyo yekushanda amplifier ichishanda nemazvo, voltage pane imwechete yekupinza uye reverse yekupinza materminal inofanirwa kuenzana, kunyangwe paine musiyano, ichiri padanho remv. .Ehe, mune mamwe epamusoro ekuisa impedance maseketi, kuramba kwemukati kweiyo multimeter kunogona kuve nekukanganisa kushoma pakuyedzwa kwevoltage, asi kazhinji haipfuure 0.2V.Kana paine musiyano we0.5V kana kupfuura, iyo amplifier pasina mubvunzo ichakundikana!Kana mudziyo ukashandiswa semuenzanisi, unotenderwa kuve neasina kuenzana ekuisa zviteshi munzira imwechete uye kudzoka kumashure.Kana iyo vhezheni yakafanana yakakura kupfuura reverse voltage, iyo inobuda voltage iri padyo neiyo yakanyanya kunaka kukosha;Kana zvakafanana voltage
四、 Zano rekuyedza SMT zvikamu zvine multimeter
Zvimwe zvikamu zveSMD zvidiki kwazvo, zvichiita kuti zvisave nyore kushandisa zvakajairwa multimeter probes yekuyedza nekugadzirisa.Chekutanga, vanogona kukonzeresa mapfupi maseketi, uye chechipiri, hazvina kunaka kuti mapuranga edunhu akaputirwa nekudzivirira apinde muchikamu chesimbi chechikamu chepini.Heino nzira iri nyore iyo ichaunza yakawanda nyore pakuyedzwa.Tora mbiri dzetsono diki dzekusonesa, (Deep Industrial Control Maintenance Technology Column) wodziisa zvakasimba pakatarisana nemultimeter pen.Zvadaro, tora tambo yemhangura yakaonda kubva kune yakawanda-strand tambo, sunga peni uye tsono yekusonesa pamwe chete newaya yakanaka yemhangura, woitengesa zvakasimba.Nenzira iyi, pakuyera zvikamu zveSMT nechinyoreso chine katsono kadiki, hapasisina njodzi yemaseketi mapfupi, uye tsono yetsono inogona kubaya iyo yekuvharisa coating uye kurova zvakananga zvikamu zvakakosha, kubvisa kudiwa kwekunetswa nekukwenya firimu.
五、Maintenance Method for Short Circuit Fault of Circuit Board Common Power Supply
Mudunhu rekuchengetedza bhodhi rekuchengetedza, kana paine pfupi dunhu kune yakajairikamagetsi, inowanzova kukanganisa kwakawanda, nokuti michina yakawanda inogovera magetsi akafanana, uye chigadziro chega chega chinoshandisa magetsi aya chinofungidzirwa kuti chipfupi.Kana pasina zvikamu zvakawanda pabhodhi, kushandisa "hoe the earth" nzira inogona kupedzisira yawana pfupi yedunhu poindi.Kana paine zvakawanda zvinoriumba, kana "badza pasi" rinogona kurima mamiriro acho zvinoenderana nerombo.Heino nzira inokurudzirwa inoshanda zvakanaka.Nekushandisa nzira iyi, unogona kuwana zvakapetwa kaviri mhedzisiro nehafu yekuedza uye kazhinji nekukurumidza kuwana mhosho.Panofanira kuva nemagetsi ane magetsi anogadziriswa uye azvino, ane voltage ye0-30V uye ikozvino ye0-3A.Magetsi aya haadhure uye anodhura anenge 300 yuan.Gadzirisa iyo yakavhurika yedunhu voltage kusvika padanho remudziyomagetsivoltage.Kutanga, gadzirisa ikozvino kune zvishoma.Isa iyi voltage kune magetsi emagetsi mapoinzi edunhu, senge 5V uye 0V zviteshi zve74 series chip.Zvichienderana nehuwandu hwechikamu chepfupi, zvishoma nezvishoma kuwedzera ikozvino.Bata mudziyo neruoko rwako.Kana imwe mudziyo ichipisa zvakanyanya, inowanzova chikamu chakakuvadzwa.Unogona kuibvisa kuti uwedzere kuyerwa nekusimbiswa.Zvechokwadi, magetsi panguva yekushanda haafaniri kudarika simba rekushanda kwechigadzirwa, uye harifaniri kuchinjwa, kana zvisina kudaro rinopisa mamwe maturusi akanaka.
六、Rabha diki kugadzirisa matambudziko makuru
Nhamba yemapuranga anoshandiswa mukutonga kwemaindasitiri ari kuwedzera, uye mapuranga akawanda anoshandisa nzira yekuisa zvigunwe zvegoridhe mumaslots.Nekuda kwekuoma kwemaindasitiri nharaunda, iyo ine huruva, hunyoro, uye inoora, zviri nyore kuti mabhodhi asave nezvikanganiso zvisina kunaka.Shamwari dzakawanda dzinogona kunge dzakagadzirisa dambudziko nekutsiva mabhodhi, asi mutengo wekutenga mapuranga wakakura kwazvo, kunyanya kune mamwe mabhodhi emidziyo inotengwa kunze kwenyika.Muchokwadi, munhu wese anogona kushandisa eraser kudzokorodza kupukuta tsvina pamunwe wegoridhe kakati wandei, kuichenesa, uyezve edza muchina.Zvichida dambudziko richagadziriswa!Nzira yacho iri nyore uye inoshanda.
七, Ongororo yekukanganisa kwemagetsi neakanaka neakaipa nguva
Panyaya yemukana, kukanganiswa kwemagetsi kwakasiyana-siyana nenguva yakanaka uye yakaipa kunogona kusanganisira zvinotevera:
1. Kusabatana kwakashata pakati pebhodhi uye slot, kutadza kubatanidza kana tambo yaputsika mukati, kusabatana kwakashata pakati pewaya plug uye terminal, uye kutadza kusungirirwa kwezvikamu zvese ndezvechikamu ichi;
2. Kumaseketi edhijitari, kukanganisa kunongoitika pasi pemamiriro chaiwo nekuda kwekukanganisa kwechiratidzo.Zvinogoneka kuti kupindira kwakanyanya kwakanganisa hurongwa hwekutonga uye hwakonzera kukanganisa, uye kunewo shanduko mune zvega zvega parameters kana mativi ese ekuita maparamita ebhodhi redunhu, zvichitungamira kune yakakosha pfungwa mukupokana-kupindira uye zvichikonzera. malfunctions;
3. Kusagadzikana kwekushisa kwezvikamu Kubva kune nhamba yakawanda yekugadzirisa maitiro, kugadzikana kwekushisa kwekutanga kwe electrolytic capacitor kwakashata, kuteverwa nemamwe ma capacitors, triodes, diodes, ICs, resistors, nezvimwewo;
4. Pane unyoro, kuunganidza guruva, nezvimwewo pabhodhi redunhu.Hunyoro uye guruva zvinoitisa magetsi nekupikisa mhedzisiro, uye kukosha kwekupokana kuchachinja panguva yekuwedzera kwekupisa.Uhu hwekupikisa hunokosha hune parallel effect nezvimwe zvikamu.Kana ichi chiitiko chakasimba, maparamita edunhu achachinjwa, zvichikonzera kukanganisa;
5. Software zvakare chimwe chezvinhu kufunga.Mazhinji ma paramita mudunhu anogadziriswa uchishandisa software, uye muganho wemamwe ma paramita akaiswa akanyanya kuderera, ari mukati meiyo yakakosha renji.Kana mamiriro ekushanda emuchina asangana nechikonzero chekuti software ione kukanganisa, alarm inobuda.
Nguva yekutumira: Jun-21-2023
