1. Lokacin gyara wutar lantarki nunin nunin LED, da farko muna buƙatar amfani da multimeter don gano ko akwai raguwar gajeriyar da'ira a cikin kowace na'ura mai ƙarfi, kamar gada mai gyara wutar lantarki, bututu mai canzawa, babban bututu mai gyara wutar lantarki mai ƙarfi. , da kuma ko mai ƙarfi mai ƙarfi wanda ke hana hawan hawan wuta ya ƙone.Sa'an nan, muna bukatar mu gane ko juriyar kowane fitarwa ƙarfin lantarki tashar jiragen ruwa ba al'ada.Idan na'urorin da ke sama sun lalace, muna buƙatar musanya su da sababbi.

2. Bayan kammala gwaje-gwajen da ke sama, idan wutar lantarki ta kunna kuma har yanzu ba ta iya yin aiki yadda ya kamata, muna buƙatar gwada ikon factor module (PFC) da pulse width modulation component (PWM), duba bayanan da suka dace, kuma mu san kanmu da su. Ayyukan kowane fil na PFC da PWM modules da kuma yanayin da ake bukata don aikin su na yau da kullum.

3. Don samar da wutar lantarki tare da kewayen PFC, wajibi ne don auna ko ƙarfin lantarki a duka ƙarshen madaidaicin fil ɗin yana kusan 380VDC.Idan akwai ƙarfin lantarki na kusan 380VDC, yana nuna cewa tsarin PFC yana aiki akai-akai.Sa'an nan, ya zama dole don gano yanayin aiki na PWM module, auna ƙarfin shigar da wutar lantarki ta VC, tashar fitarwar wutar lantarki ta VR, farawa da sarrafa wutar lantarki ta Vstart/Vcontrol, da amfani da keɓancewar 220VAC/220VAC don samar da wutar lantarki ga jagoran. allon nuni, Yi amfani da oscilloscope don lura ko sifar PWM module CT ƙarshen ƙasa shine igiyar igiyar igiyar ruwa ta Sawtooth ko igiyar alwatika tare da kyakkyawan layi.Misali, ƙarshen TL494 CT shine Sawtooth wave wave, kuma ƙarshen FA5310 CT shine igiyar triangle.Siginar kalaman na fitarwa V0 shine siginar kunkuntar bugun bugun da aka yi oda.

4. A cikin aikin kiyayewa na samar da wutar lantarki na nuni na LED, yawancin LED nunin wutar lantarki suna amfani da UC38 × & Times;Yawancin abubuwan 8-pin PWM a cikin jerin ba sa aiki saboda lalacewa ga juriyar farawa na wutar lantarki ko raguwar aikin guntu.Lokacin da babu VC bayan da'irar R ya karye, ɓangaren PWM ba zai iya aiki ba kuma yana buƙatar maye gurbin shi da resistor tare da ƙimar juriya iri ɗaya kamar na asali.Lokacin da farkon halin yanzu na ɓangaren PWM ya ƙaru, ƙimar R na iya raguwa har sai ɓangaren PWM zai iya aiki akai-akai.Lokacin gyaran wutar lantarki na GE DR, tsarin PWM shine UC3843, kuma ba a gano wasu abubuwan da ba su dace ba.Bayan haɗa resistor 220K zuwa R (220K), ɓangaren PWM yayi aiki kuma ƙarfin fitarwa ya kasance na al'ada.Wani lokaci, saboda kuskuren kewayawa, ƙarfin lantarki na 5V a ƙarshen VR shine 0V, kuma ɓangaren PWM baya aiki.Lokacin gyara wutar lantarki na kyamarar Kodak 8900, ana fuskantar wannan yanayin.An katse kewayen waje da aka haɗa da ƙarshen VR, kuma VR yana canzawa daga 0V zuwa 5V.Bangaren PWM yana aiki akai-akai kuma ƙarfin fitarwa na al'ada ne.

5. Lokacin da babu wutar lantarki a kusa da 380VDC akan capacitor tacewa, yana nuna cewa kewayen PFC baya aiki yadda yakamata.Maɓallin gano maɓalli na ƙirar PFC sune fil ɗin shigar da wutar lantarki VC, fil ɗin farawa Vstart/control, CT da fil ɗin RT, da fil V0.Lokacin gyaran kyamarar Fuji 3000, gwada cewa babu wutar lantarki 380VDC akan capacitor mai tacewa akan allo ɗaya.VC, Vstart/control, CT da RT da kuma tsarin raƙuman ruwa na V0 na al'ada ne.Babu nau'in igiyar igiyar V0 a sandar G na bututun sauya tasirin tasirin filin aunawa.Tunda FA5331 (PFC) wani nau'in faci ne, bayan an daɗe ana amfani da na'urar, akwai kuskuren saidakar tsakanin ƙarshen V0 da allon, kuma ba a aika siginar V0 zuwa ga sandar G na transistor-infected transistor. .Weld ƙarshen V0 zuwa haɗin gwiwa na solder a kan allo, kuma yi amfani da multimeter don auna ƙarfin lantarki na 380VDC na capacitor mai tacewa.Lokacin da tashar Vstart/control ta kasance a ƙananan matakin wuta kuma PFC ba za ta iya aiki ba, ya zama dole a gano da'irori masu dacewa da ke da alaƙa da kewaye a ƙarshen sa.