开关电源IC3842和6N60击爆原因，哪位大侠帮帮忙，非常感谢。换新后不工作。 开关电源是什么原因引起3842八脚无5V电压呢？842已更换...
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6N60上接的那个零点几欧的电阻换了没，就是那个限流保护取样的电阻，一般为0.33-0.5欧。6N60的S极接地的那个。 换了还不好的话检查IC3842第七脚与地之间会有一个20伏的稳压管，量量看击穿了没有，击穿了更换新的上去，如果实在找不到20伏的稳压管，就空着也可以工作。绛旓細6鑴氬埌mos绠鏋佷箣闂存湁涓數闃伙紝涓鑸嚑娆у埌20娆у乏鍙 濡傛灉浠ヤ笂鍑犳潯閮界鍚堬紝6鑴氭病鏈夋柟娉㈣緭鍑猴紝鍙互鍒ゆ柇3842鍧忎簡 濡傛灉杈撳嚭鐢靛帇鏄烦鍔ㄧ殑锛屾鏌ュ彉鍘嬪櫒鍙嶉缁曞鍒7鑴氱殑浜屾瀬绠★紝杩樻湁灏辨槸7鑴氫笂鐨勭數瀹癸紝涓鑸负47uF鍒100uF锛屽鏋滄槸4747uF鎹㈡垚100uF璇曡瘯
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绛旓細寮鏈烘棤鍏夋爡,鐢垫簮鎸囩ず鐏笉浜,寮鏈烘鏌300V姝ｅ父;寮鍏崇數婧愭病鐢靛帇杈撳嚭,璇寮鍏崇數婧愬拰鍏朵粬澶у鏁版樉绀哄櫒鐢垫簮鐩稿悓,鐢║C3842浣滀负鎸崱绋冲帇;妫鏌3842鐨7鑴氱數鍘嬪嚑涔庝负闆朵紡(姝ｅ父搴斾负15V宸﹀彸)璇ヨ剼涓3842鐨勪緵鐢靛強鍚姩鐢靛帇杈撳叆绔;鎬鐤戞帴涔嬭鑴氱殑鍚姩鐢甸樆寮璺,妫鏌300V涓3842鐨7鑴氫箣闂寸殑鐢甸樆,鍙戠幇涓鐢甸樆宸插紑璺,鍙栦笅鐪嬭壊鐜簲涓470k,...
