一、相機閃光燈不閃了怎么回事
1、電池電量(liang)不(bu)足。
2、調節的(de)拍(pai)攝模式(shi),未開啟閃光燈項。
3、閃(shan)光(guang)燈(deng)(deng)開啟手動(dong)模(mo)式:閃(shan)光(guang)燈(deng)(deng)雖然是(shi)打(da)開的,但是(shi)閃(shan)光(guang)燈(deng)(deng)有兩種模(mo)式:自動(dong)和手動(dong)。如果設置為(wei)自動(dong)模(mo)式,當光(guang)線暗(an)的情(qing)況下閃(shan)光(guang)燈(deng)(deng)會自己工作。設置為(wei)手動(dong)模(mo)式,也就是(shi)在光(guang)線較暗(an)的情(qing)況下,必須用手動(dong)才(cai)能打(da)開閃(shan)光(guang)燈(deng)(deng)。
4、閃(shan)光燈(deng)(deng)自身問(wen)題:調節閃(shan)光燈(deng)(deng)為強制閃(shan)光燈(deng)(deng)模式,檢查時如果不閃(shan),說明閃(shan)光燈(deng)(deng)有問(wen)題,應送去修理。
二、相機閃光燈維修教程
1、閃(shan)光燈出現(xian)故障后,如果試閃(shan)開關能(neng)夠繼續(xu)使(shi)用(yong)(yong),建議取出電(dian)(dian)(dian)(dian)池(chi)試閃(shan)一下(xia)(xia),進行(xing)(xing)放(fang)電(dian)(dian)(dian)(dian)。也(ye)可以用(yong)(yong)一只1K/2W的電(dian)(dian)(dian)(dian)阻在儲能(neng)電(dian)(dian)(dian)(dian)容C2兩(liang)(liang)端(duan)進行(xing)(xing)放(fang)電(dian)(dian)(dian)(dian)。由(you)于閃(shan)光后,電(dian)(dian)(dian)(dian)容兩(liang)(liang)端(duan)仍有一百伏到三百伏之間(jian)的直(zhi)流(liu)(liu)高壓,建議用(yong)(yong)兩(liang)(liang)只尖(jian)嘴(zui)鉗持電(dian)(dian)(dian)(dian)阻進行(xing)(xing)放(fang)電(dian)(dian)(dian)(dian)。另(ling)外,閃(shan)光燈充電(dian)(dian)(dian)(dian)時,開始電(dian)(dian)(dian)(dian)流(liu)(liu)較大,約3A左右,然后隨著充電(dian)(dian)(dian)(dian)時間(jian)的延長(chang)逐漸下(xia)(xia)降至100mA左右。因此(ci),在進行(xing)(xing)檢測時,電(dian)(dian)(dian)(dian)流(liu)(liu)表的量程應大于三個安(an)培,否則會損毀電(dian)(dian)(dian)(dian)流(liu)(liu)表。
2、閃光燈(deng)在使用(yong)過程中一旦出(chu)現故障,應當首(shou)先檢查電(dian)(dian)池電(dian)(dian)壓是(shi)否(fou)給力,電(dian)(dian)池座的彈簧與觸(chu)片是(shi)否(fou)有斷路(lu)或接(jie)觸(chu)不良。
(1)如(ru)果發現電(dian)源部分沒(mei)有(you)電(dian)流(liu)輸出,可斷(duan)開電(dian)源,用萬用表R×1Ω檔檢查閃光燈(deng)觸(chu)發開關K2接觸(chu)是否(fou)良好,線路(lu)有(you)無(wu)脫落或虛焊。
(2)如果在檢(jian)測中(zhong)發現輸出(chu)電(dian)流(liu)(liu)小于(yu)100mA,可聽(ting)到高(gao)頻嘯叫,應檢(jian)查直流(liu)(liu)變換器(qi)是否正(zheng)常。因為閃(shan)光燈充電(dian)時,工作電(dian)流(liu)(liu)正(zheng)常,由于(yu)3A電(dian)流(liu)(liu)逐漸下降,同(tong)時有高(gao)頻嘯叫,說明BG震蕩管工作正(zheng)常。
(3)如果工作電(dian)流為(wei)某一固(gu)定值,沒(mei)有下降,觸摸BG感覺(jue)燙手,應斷(duan)開電(dian)源,檢查電(dian)路(lu)(lu)中是否(fou)存在短路(lu)(lu),C2是否(fou)嚴重漏電(dian),極(ji)性是否(fou)接(jie)反,變壓器是否(fou)有局部(bu)擊(ji)穿。
(4)如果(guo)是(shi)(shi)氖泡(pao)ZD不亮,一般是(shi)(shi)R2短路,ZD虛(xu)焊或損(sun)壞。如果(guo)常(chang)亮不滅,一般是(shi)(shi)儲(chu)能電(dian)容(rong)C2斷路或虛(xu)焊。
(5)如果按下(xia)快門,閃(shan)(shan)(shan)光燈的閃(shan)(shan)(shan)光觸(chu)片(pian)(pian)不能復位(wei),則是簧片(pian)(pian)疲勞所致。氖泡已(yi)經起(qi)輝,按下(xia)閃(shan)(shan)(shan)光觸(chu)片(pian)(pian)開關(guan)K2,閃(shan)(shan)(shan)光燈SD不閃(shan)(shan)(shan),應檢查K2是否(fou)接(jie)觸(chu)良好。
(6)如果沒(mei)有問題接著(zhu)檢查(cha)R3、C3是否存在虛焊,不妨(fang)用表測量一(yi)下C3的(de)對地電壓,正(zheng)常是應該在一(yi)百二十至(zhi)一(yi)百八十伏左右。
值得一提的(de)是,脈(mo)沖(chong)高壓因為(wei)閃光燈管虛焊而(er)燒(shao)斷引線的(de)故(gu)障也(ye)不少見,建議(yi)認真排查(cha)。