1. Marka la hagaajinayo sahayda shaashadda LED-ka, waxaan marka hore u baahannahay inaan isticmaalno multimeter-ka si aan u ogaanno haddii ay jirto cillad gaaban oo ku jirta qalab kasta oo koronto ah, sida buundada korontadu, tuubada beddelka, tuubada toosiyaha sare ee soo noqnoqda. iyo haddii iska caabiyaha awoodda sare ee xakameynaya qulqulka qulqulka uu gubtay.Kadibna, waxaan u baahanahay inaan ogaano in iska caabinta deked kasta oo wax soo saarku ay tahay mid aan caadi ahayn.Haddii aaladaha kor ku xusan ay waxyeelo soo gaarto, waxaan u baahanahay inaan ku bedelno kuwa cusub.

2. Ka dib marka la dhamaystiro imtixaanada kor ku xusan, haddii korontada la shido oo ay weli u shaqayn kari la'dahay si sax ah, waxaan u baahan nahay in la tijaabiyo power factor module (PFC) iyo pulse width modulation component (PWM), dib u eegis macluumaadka la xiriira, oo aan is barano nafteena. Shaqooyinka biin kasta oo ka mid ah qaybaha PFC iyo PWM iyo shuruudaha lagama maarmaanka u ah hawlgalkooda caadiga ah.

3. Korontada leh wareegga PFC, waxaa lagama maarmaan ah in la cabbiro haddii danabka labada daraf ee capacitor filter uu ku saabsan yahay 380VDC.Haddii uu jiro koronto qiyaastii ah 380VDC, waxay muujineysaa in moduleka PFC uu si caadi ah u shaqeynayo.Kadibna, waxaa lagama maarmaan ah in la ogaado xaaladda shaqada ee moduleka PWM, cabbiro galka korantada VC, tixraaca wax soo saarka korantada VR, bilawga iyo xakamaynta korantada terminaalka Vstart / VAC, oo isticmaal koronto-bixiye go'doon 220VAC / 220VAC si aad u siiso awoodda hogaanka. Shaashadda, Isticmaal oscilloscope si aad u aragto in qaabka mawjada PWM module CT dhamaadka ilaa dhulka uu yahay Sawtooth wave hir ama saddex xagal oo leh toosan wanaagsan.Tusaale ahaan, TL494 CT dhamaadka waa Sawtooth wave wave, iyo FA5310 CT dhamaadka waa hir saddex xagal.Qaabka mawjada ee wax soo saarka V0 ma yahay signal garaac cidhiidhi ah oo la amray.

4. In dhaqanka dayactirka sahayda shaashadda LED, sahayda korantada shaashadda LED badan isticmaalaan UC38 × & Times;Inta badan qaybaha 8-pin PWM ee taxanaha ah ma shaqeeyaan sababtoo ah dhaawac soo gaadhay caabbinta bilawga ah ee korontada ama hoos u dhaca waxqabadka chip.Marka aysan jirin VC ka dib marka wareegga R la jabiyo, qaybta PWM ma shaqeyn karto oo waxay u baahan tahay in lagu beddelo caabiyeyaasha leh qiimaha caabbinta awoodda tan asalka ah.Marka bilawga hadda ee qaybta PWM kordho, qiimaha R waa la dhimi karaa ilaa qaybta PWM ay si caadi ah u shaqayn karto.Marka la hagaajinayo sahayda korantada ee GE DR, moduleka PWM wuxuu ahaa UC3843, mana jirin cillado kale oo la ogaaday.Ka dib markii lagu xidhay iska caabiyaha 220K R (220K), qaybta PWM ayaa shaqeysay, korantada wax soo saarkuna waxay ahayd mid caadi ah.Mararka qaarkood, cilladaha wareegga wareegga, korantada 5V ee dhammaadka VR waa 0V, qaybta PWMna ma shaqeyso.Marka la hagaajinayo korontada Kodak 8900 camera, xaaladdan ayaa la kulmay.Wareegga dibadda ee ku xiran dhammaadka VR waa go'an yahay, VR-guna wuxuu ka beddelayaa 0V ilaa 5V.Qaybta PWM waxay u shaqaysaa si caadi ah, danab soo-saarkuna waa caadi.

5. Marka aysan jirin wax danab ah oo ku dhow 380VDC oo ku saabsan capacitor shaandhaynta, waxay muujinaysaa in wareegga PFC uusan si sax ah u shaqeynin.Biinanka muhiimka ah ee moduleka PFC waa pin-ka-gelinta awoodda VC, biinanka bilowga Vstart/control, biinanka CT iyo RT, iyo biinanka V0.Markaad hagaajinayso kamarada Fuji 3000, tijaabi in aanay jirin danab 380VDC ah oo ku saabsan capacitor filter ee hal sabuur.VC, Vstart/control, CT iyo RT iyo sidoo kale qaabka mowjadaha V0 waa caadi.Ma jiro qaab mowjad V0 ah oo ku yaal tiirka G ee cabbiraadda saamaynta goobta tuubada korontadaMaadaama FA5331 (PFC) ay tahay unug balastar ah, ka dib markii muddo dheer la isticmaalayey mashiinka, waxaa jira alxan khaldan oo u dhexeeya dhamaadka V0 iyo guddiga, iyo calaamada V0 looma diro G cirifka transistor- saamaynta Field .Ku allamee dhamaadka V0 ee isku-dhafka alxanka ee looxa, oo isticmaal multimeter si aad u cabbirto korantada 380VDC ee capacitor-ka.Marka terminalka Vstart/control uu ku jiro heer awood hoose PFC-gu aanu shaqayn karin, waxaa lagama maarmaan ah in la ogaado wareegyada ku haboon ee ku xiran hareeraha meesha ugu dambeysa.