哈囉~我是曾仔… 大家午安!大家好~
今天來看一台較老舊的機種,底下這台:Westinghouse(懷特西屋)型號:LC-42S350A
![](https://3.bp.blogspot.com/-uGNiSUBNxvA/WwoUAy8zv6I/AAAAAAABRRE/x64jixw-hoMiT46o9xs1z3t9V30xgYgcACKgBGAs/s640/001.JPG)
![](https://3.bp.blogspot.com/-jdKNC1oELEY/WwoUAwGupJI/AAAAAAABRRE/iJ1Q9-JZrfIn7ZzsW7B_t-HOGWZATuwUACKgBGAs/s640/002.JPG)
這是它的內部電路分佈:
![](https://3.bp.blogspot.com/-sIDHTRRT94g/WwoUA3eqEaI/AAAAAAABRRE/34mzH1EyBW8-zloMTSVAlha5QsaOO3DhQCKgBGAs/s640/003.JPG)
![](https://3.bp.blogspot.com/-K8YmO9N7Y5w/WwoUA7RbZKI/AAAAAAABRRE/cbExagVubvwy3ZbiMmtr-JSV0t8PbYkIQCKgBGAs/s640/004.JPG)
![](https://3.bp.blogspot.com/-_0AUyekqmow/WwoUA5_rQtI/AAAAAAABRRE/-mm9sNmHYek-VBLNC-pgs4Ie1Yp-Rn5uQCKgBGAs/s640/005.JPG)
![](https://4.bp.blogspot.com/-kOLZODQ5Ay0/WwoUA29oQwI/AAAAAAABRRE/ButbYYxig1Aif3X-Ia7XGzBkXPtc7-xOgCKgBGAs/s640/006.JPG)
![](https://2.bp.blogspot.com/-9Nt9G3sn3Fw/WwoUA-qTBhI/AAAAAAABRRE/bDpbYuyuq1gN6nOMdgoCY7BtD0YdpDn_ACKgBGAs/s640/007.JPG)
這是它的故障現象:送電後有待機紅燈號…,可是用遙控器使用卻無法啟動…
按鍵啟動也不行…
![](https://2.bp.blogspot.com/-3BNpP5_YD6o/WwoUAydcWfI/AAAAAAABRRE/uMut85XXqCEnslX3lwuwXKdOQcq8PYqgwCKgBGAs/s640/008.JPG)
![](https://2.bp.blogspot.com/-MV80fyHEW_M/WwoUA-pflxI/AAAAAAABRRE/Iuh7ySsAo20sosaOM8HicaoT_405Mt36ACKgBGAs/s640/009.JPG)
![](https://2.bp.blogspot.com/-USvnqNdSNUU/WwoUA_I8bTI/AAAAAAABRRE/whROE4QpQAwg1RW5oocoWKBtoVwtVCvMgCKgBGAs/s640/010.JPG)
最後…
在短接Power按鍵後,終於啟動了綠燈號…(不過…你不要太高興!)
![](https://1.bp.blogspot.com/-_qh3yWfskCY/WwoUAwCNoLI/AAAAAAABRRE/ZEzTMNChNMAa_l4gwFzV8wwhMRXU5hLaQCKgBGAs/s640/011.JPG)
為什麼不要太高興…?其實是啟動後除了綠燈號亮起外,其餘都是沒有作動的…,也就是說沒有亮起背光,也沒有聲效輸出…
當下趕緊查量這一個電位訊息…,底下這一個是電源板啟動後PFC控制器升壓的電位…,正常電壓要在380~400V
現在你有看到的…,他是不夠的,也是不穩定的浮動電位,這樣當然無法讓主要電壓DC12、DC24V正常輸出…
![](https://3.bp.blogspot.com/-2WEoUpwnnQg/WwoUA9L7xwI/AAAAAAABRRE/3c1ziwdOTqw3ZIuRBaIZXG1wZaVk0ziqACKgBGAs/s640/012.JPG)
![](https://3.bp.blogspot.com/--HG-ntwULzY/WwoUA43nj2I/AAAAAAABRRE/qJUbm8D4xKIdrpFXk_A4UzMO1yYjrPxjgCKgBGAs/s640/013.JPG)
![](https://1.bp.blogspot.com/-PbxBel353FM/WwoUA7exBlI/AAAAAAABRRE/MroGvpCHDt0pDL9aGApTXEurA8bJ7q1GQCKgBGAs/s640/014.JPG)
那要先來排除這個問題點…
atunPCLCD 發表在 痞客邦 留言(0) 人氣()
哈囉~我是曾仔… 大家午安!大家好~
今天來看這一台電視維修…,機種、型號是:BenQ(明基)型號:43IW6500
![](https://1.bp.blogspot.com/-w3f5ki2oogI/WwjgmA5igrI/AAAAAAABROE/-Ien9NzQD5IvmxooqhqSPJWbBecmgXxCACKgBGAs/s640/003.JPG)
![](https://2.bp.blogspot.com/-EwTvpVBNf3I/WwjgmC6N_bI/AAAAAAABROE/5uIhCrQ-P3AjK8D501P7qfg_F8pSmIz4gCKgBGAs/s640/004.JPG)
這是它的故障現象:送電後…待機紅燈號沒有亮起…
![](https://3.bp.blogspot.com/-sYR7DyrCuJk/WwjgmBILofI/AAAAAAABROE/PEBTfBtpE2EHhkoiydEomruKrtnYoIzvQCKgBGAs/s640/005.JPG)
這是它的內部電路分佈:
![](https://3.bp.blogspot.com/-tApjP9B5icU/WwjgmFfcgNI/AAAAAAABROE/2mXoG9OOg-o04HsS_BFyEWSSE6Q64l6jgCKgBGAs/s640/006.JPG)
![](https://3.bp.blogspot.com/-3JgmPySbL4g/WwjgmNtFyhI/AAAAAAABROE/JsndbPKjkUIvZv-5Cdq2C1PFvhtLlKnigCKgBGAs/s640/007.JPG)
![](https://2.bp.blogspot.com/-p6RjB76H2mQ/WwjgmIm5vhI/AAAAAAABROE/yXrWSylv7DkRk20EsW8NdsFALVzdU1okQCKgBGAs/s640/008.JPG)
![](https://2.bp.blogspot.com/-AerU3WfIDAs/WwjgmC29RbI/AAAAAAABROE/ufc6-c0sHoY3WZQpoFOP-JK1r08B7yCQACKgBGAs/s640/009.JPG)
現在查量了…
確定待機電位沒有輸出…
![](https://1.bp.blogspot.com/-aLRbZPvBYx0/WwjgmBcpX9I/AAAAAAABROE/OJaH0W-_1uM_XtaKRRSKRxHz7NKAhwLGQCKgBGAs/s640/010.JPG)
![](https://1.bp.blogspot.com/-HvjwSQ0fHUI/WwjgmNJ4fqI/AAAAAAABROE/FJv5fNwbU88H_4v_2qmcDi6MuvPVyotLgCKgBGAs/s640/011.JPG)
那…當然只能解下電供板做查量…
![](https://2.bp.blogspot.com/-vBL3AA3abys/WwjgmM6uMoI/AAAAAAABROE/Ypb5O61O5DIRG2JfRsQ5ARGKYFsyyCqzACKgBGAs/s640/012.JPG)
![](https://1.bp.blogspot.com/-iMCORgpd9UU/WwjgmI0FYJI/AAAAAAABROE/cfueDO--7csigdkzyX8sQHx9YoZoevv9wCKgBGAs/s640/013.JPG)
![](https://4.bp.blogspot.com/-FQ0KDOMXQrQ/WwjgmOD3pZI/AAAAAAABROE/HD4jCNaR36YeRDHTT89teAS7aA4-A3v0gCKgBGAs/s640/014.JPG)
![](https://3.bp.blogspot.com/-Q1c4iNuroFk/WwjgmJbY9OI/AAAAAAABROE/JJrsE7COAqcaypj_-FvyPrtCfLpKVAm_ACKgBGAs/s640/016.JPG)
現在重新再尬入機器中…
![](https://3.bp.blogspot.com/-B6oOnL6V3VI/WwjgmHsl6dI/AAAAAAABROE/3r0DRHmTY9IHlj4z_BhQdx_7TNlFSxXpACKgBGAs/s640/019.JPG)
你可以看到,經過對電源板查檢…、汰換…,現在已經可以量測到電供板的輸出電位:DC12V
![](https://2.bp.blogspot.com/-jPx6QH4HsIs/WwjgmMGlnyI/AAAAAAABROE/ZDs5NQQxzMUy9LSF0bDjKfy0f5_g9JeUQCKgBGAs/s640/020.JPG)
atunPCLCD 發表在 痞客邦 留言(0) 人氣()
哈囉~我是曾仔… 大家午安!大家好~
維修件PO文的進度上,已經追趕得差不多,若是有比較精彩螢幕維修案例,也加減來給它PO文撰寫…
底下圖照全程都是用手機拍攝,所以圖像、尺寸就有點奇怪,大家就多多包涵,將就看啦…
今天主角:AOC(冠捷)型號:e2351Fh
![](https://4.bp.blogspot.com/-o6HflFO5DJU/WwfJ4IPetDI/AAAAAAABRMQ/xM7L4foY4p4yRdZwigx_zjjdh3FD61LjQCKgBGAs/s640/IMAG1437.jpg)
![](https://4.bp.blogspot.com/-6N73LzjksMY/WwfJ4I_DDXI/AAAAAAABRMQ/eMxFqEP_iwI3-26LkmFbW-8JLKu-OoS1QCKgBGAs/s640/IMAG1439.jpg)
腳架座,是這樣取出的…
![](https://3.bp.blogspot.com/-IhOpl_7EX1U/WwfJ4FoeS0I/AAAAAAABRMQ/d_ssx8g2j9I8XzFegJsJggzAwl6rq1xygCKgBGAs/s640/IMAG1440.jpg)
![](https://1.bp.blogspot.com/-BJRJHCF2AIY/WwfJ4HfXXrI/AAAAAAABRMQ/ygFAKKe-Hj8gCHUzPbMCshjJjk32xcf5wCKgBGAs/s640/IMAG1441.jpg)
看到內部線路不平整…,不用多說…當然已經被動過手腳…
![](https://4.bp.blogspot.com/-mnT3pCErVHY/WwfJ4Gigo1I/AAAAAAABRMQ/8ax4xH-2stwu6TdfVKI6rls2CBIPNSwEACKgBGAs/s640/IMAG1442.jpg)
這條是通往LED背光的軟排導線…
你看看,它的金屬導腳已經慘不忍睹了…,當然不能使用…,要更新…
![](https://1.bp.blogspot.com/-IbQF8cHl1j4/WwfJ4Jkr9jI/AAAAAAABRMQ/hFIFNj4rUBICUODgGWKiKdo-7XsyzJR8gCKgBGAs/s640/IMAG1443.jpg)
![](https://2.bp.blogspot.com/-M7XDtldid7U/WwfJ4JyVSQI/AAAAAAABRMQ/sWMwCFgpplQVvdG8h0gh8VtrOdF0njHYACKgBGAs/s640/IMAG1444.jpg)
上頭軟排金屬導腳算是小case…
現在這個就有點……,其實是非常無言了……
這邊是主板送往面板的訊號PIN座,你不覺得它很奇怪嘛?它好像少了什麼嘛?
![](https://4.bp.blogspot.com/-soYfkta84d0/WwfJ4LT4BYI/AAAAAAABRMQ/nkQ2iWkiz9MmhULs17g8kdXmRLBqCeINgCKgBGAs/s640/IMAG1445.jpg)
先救它看看…
![](https://3.bp.blogspot.com/-KlB4KUKqZyM/WwfJ4GuTCFI/AAAAAAABRMQ/6WTSCS653rURv5GV8fQU1Fc1QGZ8YxIHACKgBGAs/s640/IMAG1446.jpg)
找個合適腳座的來給它焊接入替…
![](https://4.bp.blogspot.com/-5dbumFubw80/WwfJ4PvqtzI/AAAAAAABRMQ/FvBLApobxIUpuGjt0Dwggwz68zXaLmbFQCKgBGAs/s640/IMAG1447.jpg)
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