咱…親愛的眾網友~大家好!
各位午安~首先來祝賀一下眾家網路上的好朋友~
『2015』新年快樂!新年如意~事事順利~
今天來看一台小型液晶電視的維修~前些時候才剛PO過一台這型的維修文,沒想到這麼短的時間又『再見』了~如:
液晶電視維修~TECO(東元)型號:TL-2498TV,啟動後~無顯示畫面維修~
底下是這一台的背後照~
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來看一下它的故障現象~
一開始的送電測試時,畫面是正常的~
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不一會後~畫面還是存在~
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只是…你該有看到,畫面中會有許多水平移動的粗狀一點的『虛線條』~
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到了最後~什麼畫面通通不見了~就顯示了底下這樣的畫面~
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故障的畫面就一直~一直的再持續演化中…
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最後!甚至於當機!所有的畫面定住不動,不會再有色彩的變化!
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來拆機查檢囉~
atunPCLCD 發表在 痞客邦 留言(0) 人氣()
咱…親愛的眾網友~大家好!
各位早安~今天來看一台外地寄件的液晶螢幕維修~
別誤會!那個只是用了AOC的紙箱而已~
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內容物是這一台~
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DELL(戴爾)型號:2408WFPb
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剛剛上頭有看到~前框架有點脫落~
這回拆到這~似乎看得出它已經被動過手腳了~
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再解下洞洞保護鐵蓋~
整個電路控制就擺在眼前~這些電路板看過幾百遍了說~
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在繼上回這個維修實例!
液晶螢幕維修~DELL(戴爾)型號:2408WFPb,啟動後顯示『黑亮屏』既主板改裝維修~
本日這台又與上個實例一樣,是相同的故障現象,也還是僅有亮著『黑亮屏』而已~這是通病吧?
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比較那上回那個連結實例,這回本機器還有點反應!
底下這兩個數據是晶片做工後,送往Tcon的低壓差分訊號的電壓~看來是有在工作,只是覺得這電壓有點奇怪說~似乎高了一些…對1.51V的這一組來說~雖說它電壓怪怪的,但是也不能很確定主板的主晶片是否真的不適?
atunPCLCD 發表在 痞客邦 留言(0) 人氣()
咱…親愛的眾網友~大家好!
各位午安~關於這一台的故障現象,還真的是少見!
通常都是熱機一陣子才會有的這種現象,而它卻是只開機一會而了已,根本就還沒熱!,就這個樣子~
也就是說無論你是熱機多久,或者是只開機了一下子,只要你關機再重開,就會出現這樣的狀況!
底下是它的外觀照:
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控制電路保護蓋上,寫了一堆文字,不曉得代表了什麼意思?
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