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智能电视机白屏毛病是甚么缘由

  电视机是咱们平常文娱领受的一大窗口,固然此刻挪动装备呈现,终端愈来愈多,电视机依然未被裁减,且愈来愈变智能,可是是电器一直会呈现毛病,长时辰利用以后,电视机呈现了白屏,碰到这类环境该若何处置,来得快维修此刻为您解答:智能电视机白屏毛病是甚么缘由

  液晶屏毛(mao)病:屏幕(mu)毛(mao)病(屏裂,屏暗(an),屏污,屏恍(huang)惚,闪(shan)屏,花屏,黑屏,红屏,白屏,黄屏等(deng));屏幕(mu)显现毛(mao)病(屏幕(mu)呈现亮(liang)点,亮(liang)块,亮(liang)线(xian),暗(an)线(xian)等(deng));屏幕(mu)内(nei)容毛(mao)病(图(tu)像偏色(se), 字(zi)体恍(huang)惚,字(zi)体巨(ju)细不一(yi)等(deng))

  液晶电视(shi)机(ji)维修(xiu) 液晶驱动(dong)板毛(mao)病:开机(ji)三无(wu)(wu)(既无(wu)(wu)图像,无(wu)(wu)光栅(zha),无(wu)(wu)伴(ban)音,电源唆(suo)使灯不(bu)亮(liang));开机(ji)非常(开机(ji)主动(dong)换台,音量主动(dong)增添等);声(sheng)(sheng)响(xiang)不(bu)普通(声(sheng)(sheng)响(xiang)音量小,嘶哑,失 真等);

智能电视机白屏是甚么缘由

  液晶电视白屏 主板普通环境下

  A.呈现白(bai)屏景(jing)象表(biao)现背光板(ban)能普通任务(wu),起(qi)首判定主板(ban)可否普通任务(wu),可按电(dian)源开(kai)关查抄唆使灯(deng)有不(bu)反(fan)映,

  若是唆使灯可以或许变更色彩,标明主板任务普通:

  1.查抄(chao)主板(ban)旌(jing)旗(qi)灯号输入到屏的毗(pi)连线是否是是有打仗不良(可以或(huo)许替代毗(pi)连线或(huo)屏)

  2.查(cha)抄主(zhu)板各个(ge)任务点的电压是否是是普通,出(chu)格是屏的供电电压

  3.用示波(bo)器查抄行场旌(jing)(jing)旗灯号(hao)和时(shi)钟旌(jing)(jing)旗灯号(hao)(由输入(ru)到输入(ru))

  液晶电视白屏 主板不普通环境

  B.如唆使灯无反映(ying)或不亮(liang),标(biao)明主板任(ren)务不普通:

  1.查(cha)抄主板各任务点的(de)(de)电(dian)(dian)压(ya),要(yao)注重EEPROM的(de)(de)电(dian)(dian)压(ya)(4.8V摆布),复位电(dian)(dian)压(ya)(高(gao)电(dian)(dian)平或低电(dian)(dian)平,按(an)照机型差别),MCU电(dian)(dian)压(ya).如呈(cheng)(cheng)现电(dian)(dian)源短(duan)(duan)(duan)路,要(yao)仔细查(cha)找短(duan)(duan)(duan)路地位,会有PCB板铜箔呈(cheng)(cheng)现短(duan)(duan)(duan)路的(de)(de)可(ke)以或许.

  2.查找MCU各脚与主板的打仗是(shi)(shi)否是(shi)(shi)是(shi)(shi)杰出

  3.查抄主板芯片和MCU是(shi)(shi)否(fou)是(shi)(shi)是(shi)(shi)任务,可(ke)用(yong)示(shi)波器(qi)丈量晶振是(shi)(shi)否(fou)是(shi)(shi)是(shi)(shi)起振

  4.须要(yao)时替(ti)代MCU或对MCU停止从头烧录

  引发白屏的缘由

  电(dian)(dian)(dian)(dian)视机白(bai)屏(ping)有(you)可以或(huo)(huo)许因此下缘由:屏(ping)线零落,显(xian)现器(qi)会白(bai)屏(ping),这是(shi)比拟简略的(de)毛病(bing),只需查抄(chao)线路(lu)(lu),看(kan)看(kan)哪松了(le),插紧;屏(ping)电(dian)(dian)(dian)(dian)路(lu)(lu)板保险熔断;旌旗灯号非常(chang);屏(ping)电(dian)(dian)(dian)(dian)源(yuan)变更(geng)电(dian)(dian)(dian)(dian)路(lu)(lu)毛病(bing)即(ji)DC-DC电(dian)(dian)(dian)(dian)路(lu)(lu),如稳压(ya)器(qi)破坏(huai),发生毛病(bing)时偶然候有(you)长久显(xian)现或(huo)(huo)无显(xian)现而(er)后白(bai)屏(ping);液晶屏(ping)自身,正负压(ya)供电(dian)(dian)(dian)(dian)缺乏(fa)形(xing)成,坚持电(dian)(dian)(dian)(dian)压(ya)的(de)不(bu)变;元件器(qi)寿命老化,这类景象普通是(shi)电(dian)(dian)(dian)(dian)容题(ti)目。显(xian)现器(qi)主(zhu)板节制主(zhu)芯片特征不(bu)良(liang)或(huo)(huo)破坏(huai)。显(xian)现器(qi)显(xian)象管的(de)题(ti)目。

  若(ruo)是(shi)(shi)(shi)(shi)是(shi)(shi)(shi)(shi)显(xian)(xian)现(xian)器(qi)(qi)的(de)题目,把显(xian)(xian)现(xian)器(qi)(qi)毗连到另外一台主机上利用,若(ruo)是(shi)(shi)(shi)(shi)毛病消(xiao)逝,则可以(yi)或许是(shi)(shi)(shi)(shi)显(xian)(xian)卡的(de)毛病。若(ruo)是(shi)(shi)(shi)(shi)毛病照(zhao)旧,则可以(yi)或许是(shi)(shi)(shi)(shi)显(xian)(xian)现(xian)器(qi)(qi)自身的(de)毛病或显(xian)(xian)现(xian)器(qi)(qi)电缆线接口(kou)的(de)毛病。查抄显(xian)(xian)现(xian)器(qi)(qi)电缆线接口(kou)金属针是(shi)(shi)(shi)(shi)否是(shi)(shi)(shi)(shi)是(shi)(shi)(shi)(shi)折(zhe)断或曲折(zhe),若(ruo)是(shi)(shi)(shi)(shi)不行(xing),爽性(xing)给显(xian)(xian)现(xian)器(qi)(qi)改换一条(tiao)新的(de)电缆线看(kan)(kan)看(kan)(kan)。

  主板可以或许普通停止任务的环境

  液晶(jing)电(dian)(dian)视白屏(ping)申明它的(de)背光板可以(yi)或(huo)许(xu)普通的(de)停(ting)止(zhi)(zhi)任务(wu)(wu),这(zhei)时(shi)候(hou)辰(chen)我么起首须(xu)要判定的(de)便是(shi)(shi)(shi)电(dian)(dian)视主(zhu)板能不能普通停(ting)止(zhi)(zhi)任务(wu)(wu),若是(shi)(shi)(shi)电(dian)(dian)视机唆使灯可以(yi)或(huo)许(xu)变更色彩,那(nei)末就(jiu)表现主(zhu)板可以(yi)或(huo)许(xu)普通停(ting)止(zhi)(zhi)任务(wu)(wu)。在查(cha)抄的(de)时(shi)辰(chen)就(jiu)应当侧重查(cha)抄一下几(ji)个(ge)处(chu)所(suo):1、主(zhu)板的(de)旌(jing)旗灯号输入(ru)和屏(ping)的(de)毗连线是(shi)(shi)(shi)否是(shi)(shi)(shi)是(shi)(shi)(shi)呈(cheng)现了(le)打仗不良的(de)环境。2、主(zhu)板的(de)各个(ge)任务(wu)(wu)点(dian)上的(de)电(dian)(dian)压是(shi)(shi)(shi)否是(shi)(shi)(shi)是(shi)(shi)(shi)普通,出(chu)格是(shi)(shi)(shi)显现屏(ping)的(de)供电(dian)(dian)电(dian)(dian)压是(shi)(shi)(shi)否是(shi)(shi)(shi)是(shi)(shi)(shi)普通的(de)。利用示波器来查(cha)抄电(dian)(dian)视机的(de)行场旌(jing)旗灯号和时(shi)钟旌(jing)旗灯号是(shi)(shi)(shi)否是(shi)(shi)(shi)是(shi)(shi)(shi)普通。

  主板不能普通停止任务的环境

  若是(shi)(shi)(shi)(shi)电视机它(ta)(ta)的(de)(de)(de)(de)唆使灯不(bu)反映,那末就表(biao)现主(zhu)(zhu)(zhu)板的(de)(de)(de)(de)不(bu)能普通停(ting)止任(ren)(ren)务,这时候辰就应当查(cha)抄这些处所了(le):1、主(zhu)(zhu)(zhu)板的(de)(de)(de)(de)各个任(ren)(ren)务点的(de)(de)(de)(de)电压(ya)(ya)是(shi)(shi)(shi)(shi)否(fou)(fou)是(shi)(shi)(shi)(shi)是(shi)(shi)(shi)(shi)普通,出格(ge)是(shi)(shi)(shi)(shi)EEPROM的(de)(de)(de)(de)电压(ya)(ya),它(ta)(ta)的(de)(de)(de)(de)电压(ya)(ya)凡是(shi)(shi)(shi)(shi)都是(shi)(shi)(shi)(shi)在4.8V摆(bai)布,另(ling)有复位(wei)电压(ya)(ya)、MCU电压(ya)(ya)等,若是(shi)(shi)(shi)(shi)呈现了(le)电源短(duan)路(lu)的(de)(de)(de)(de)环(huan)境,那末就须要仔细的(de)(de)(de)(de)查(cha)找出短(duan)路(lu)的(de)(de)(de)(de)地位(wei),同(tong)时是(shi)(shi)(shi)(shi)否(fou)(fou)是(shi)(shi)(shi)(shi)是(shi)(shi)(shi)(shi)有PCB板铜箔呈现短(duan)路(lu)的(de)(de)(de)(de)可以(yi)或许。2、查(cha)抄MCU各脚(jiao)和主(zhu)(zhu)(zhu)板之间的(de)(de)(de)(de)毗连线是(shi)(shi)(shi)(shi)否(fou)(fou)是(shi)(shi)(shi)(shi)是(shi)(shi)(shi)(shi)普通的(de)(de)(de)(de)。3、主(zhu)(zhu)(zhu)板芯片和MCU能不(bu)能普通任(ren)(ren)务,同(tong)时利用示波器检(jian)测(ce)晶振(zhen)能不(bu)能起振(zhen)。

  智能电视机(ji)白(bai)屏是(shi)甚么缘(yuan)由(you)?上(shang)述便是(shi)抵家客为大师供(gong)给的电视机(ji)白(bai)屏处置(zhi)(zhi)计划,固然碰到这(zhei)类毛病请实时接洽(qia)咱(zan)(zan)们,咱(zan)(zan)们为您供(gong)给专业维修职员为您上(shang)门供(gong)给详细(xi)检测,找到缘(yuan)由(you)并实时处置(zhi)(zhi),不迟误你享(xiang)用糊(hu)口(kou)的兴趣!