1. Mugihe cyo gusana LED yerekana amashanyarazi yatanzwe, dukeneye mbere na mbere gukoresha multimeter kugirango tumenye niba muri buri gikoresho cyamashanyarazi habaho gusenyuka, nkikiraro cyogukosora amashanyarazi, umuyoboro woguhindura, umuyoboro mwinshi-mwinshi wogukosora , kandi niba imbaraga-zirwanya imbaraga zirwanya umuvuduko mwinshi zirashya.Noneho, dukeneye kumenya niba kurwanya buri cyambu gisohoka voltage idasanzwe.Niba ibikoresho byavuzwe haruguru byangiritse, dukeneye kubisimbuza nibindi bishya.

2. Nyuma yo kurangiza ibizamini byavuzwe haruguru, niba amashanyarazi yarafunguwe kandi ntagishobora gukora neza, dukeneye kugerageza module module (PFC) hamwe nubugari bwa pulse ubugari (PWM), gusuzuma amakuru ajyanye, no kumenyera hamwe imikorere ya buri pin ya moderi ya PFC na PWM nibisabwa bikenewe mubikorwa byabo bisanzwe.

3. Kumashanyarazi hamwe numuzunguruko wa PFC, birakenewe gupima niba voltage kumpande zombi za capacitor ya filteri igera kuri 380VDC.Niba hari voltage ya 380VDC, byerekana ko module ya PFC ikora bisanzwe.Noneho, birakenewe kumenya imiterere yimikorere ya module ya PWM, gupima ingufu zayo zinjira mumashanyarazi VC, kwerekana voltage isohoka ya terefone VR, gutangira no kugenzura amashanyarazi ya Vstart / Vcontrol, hanyuma ugakoresha transformateur ya 220VAC / 220VAC kugirango utange ingufu kubayoboye kwerekana ecran, Koresha oscilloscope kugirango urebe niba imiterere yumurongo wa PWM module CT iherezo kubutaka ni Sawtooth wave wave cyangwa triangle wave hamwe numurongo mwiza.Kurugero, TL494 CT iherezo ni Sawtooth wave wave, naho FA5310 CT impera ni mpandeshatu.Numuhengeri wibisohoka V0 byateganijwe byoroheje byerekana ibimenyetso.

4. Mubikorwa byo kubungabunga LED yerekana amashanyarazi, amashanyarazi menshi ya LED yerekana amashanyarazi akoresha UC38 × & Times;Ibyinshi mubice 8-pin ya PWM murukurikirane ntibikora kubera kwangirika kwintangiriro yo gutanga amashanyarazi cyangwa kugabanuka kwimikorere ya chip.Iyo nta VC nyuma yumuzunguruko wa R ucitse, ibice bya PWM ntibishobora gukora kandi bigomba gusimburwa na rezistor ifite agaciro kangana nimbaraga nkiyambere.Iyo intangiriro yo gutangiza ibice bya PWM yiyongereye, agaciro R gashobora kugabanuka kugeza igice cya PWM gishobora gukora mubisanzwe.Mugihe cyo gusana amashanyarazi ya GE DR, module ya PWM yari UC3843, kandi ntakindi kintu kidasanzwe cyagaragaye.Nyuma yo guhuza 220K irwanya R (220K), igice cya PWM cyarakoze kandi voltage yasohotse yari isanzwe.Rimwe na rimwe, kubera amakosa yumuzunguruko wa peripheri, voltage ya 5V kumpera ya VR ni 0V, kandi ibice bya PWM ntibikora.Iyo usana amashanyarazi ya kamera ya Kodak 8900, iki kibazo kirahura.Inzira yo hanze ihujwe na VR iherezo irahagaritswe, kandi VR ihinduka kuva 0V ikagera kuri 5V.Ibice bya PWM bikora mubisanzwe kandi ibisohoka voltage nibisanzwe.

5. Iyo nta voltage igera kuri 380VDC kuri capacitori yo kuyungurura, byerekana ko umuzunguruko wa PFC udakora neza.Urufunguzo rwo gutahura pin ya module ya PFC nimbaraga zinjiza pin VC, itangira pin Vstart / igenzura, pin na CT na RT, na V0 pin.Mugihe cyo gusana kamera ya Fuji 3000, gerageza urebe ko nta voltage ya 380VDC iri kuri capacitor ya filteri kurubaho rumwe.VC, Vstart / igenzura, CT na RT ibyerekezo kimwe na V0 imiterere isanzwe.Hano nta V0 yumurongo uri kuri G pole yo gupima umurima imbaraga zingirakamaro.Kubera ko FA5331 (PFC) ari patch yamashanyarazi, nyuma yigihe kinini cyo gukoresha imashini, habaho kugurisha nabi hagati ya V0 nimbaho, kandi ikimenyetso cya V0 ntabwo cyoherejwe kuri G pole ya tristoriste ya Field-effect .Kuzuza impera ya V0 kugeza kumugurisha ku kibaho, hanyuma ukoreshe multimeter kugirango upime 380VDC voltage ya capacitori.Iyo Vstart / igenzura rya terefone iri kurwego rwo hasi kandi PFC ntishobora gukora, birakenewe kumenya imiyoboro ijyanye na peripheri kumpera yayo.