哈囉~我是曾仔… 大家午安!大家好~
來看一下今天的主角:SAMSUNG(三星)型號:UA46D6400UM
![](https://1.bp.blogspot.com/-ABTbEAxkIkM/XQT19sKSSDI/AAAAAAABdxY/IRgNv8qSxu4qcUOw_Wg679KJkzh1PuopwCKgBGAs/s640/001.jpg)
這是它的內部電路:
![](https://1.bp.blogspot.com/-y_t0jLJuF3A/XQT19pvpOlI/AAAAAAABdxY/vve-Fw1xv-UFM1iuYXCQGYWdioRbRILnwCKgBGAs/s640/037.JPG)
![](https://1.bp.blogspot.com/-1gQ2Mup2rRI/XQT19i6i6JI/AAAAAAABdxY/g35y7lA02U8b9x_IL6UpbkLmmJaUG0E8gCKgBGAs/s640/038.JPG)
![](https://1.bp.blogspot.com/-nVs3zQki_BY/XQT19hh4fgI/AAAAAAABdxY/SYaWq73NzwUntNegbGugmXcUDcxHkUMGgCKgBGAs/s640/039.JPG)
一開始啟動…,其實是OK的…
有正常亮起…
![](https://1.bp.blogspot.com/-ij9I3j4DMkI/XQT19unbbQI/AAAAAAABdxY/8sUHLUs_0VAzRV9LLUJoCDZBWqxuEdPFgCKgBGAs/s640/040.JPG)
![](https://1.bp.blogspot.com/-HgufXsbLogA/XQT19g7x94I/AAAAAAABdxY/twC38Wub3bIqiD8c9lSUinzUfP8dDWg_gCKgBGAs/s640/041.JPG)
![](https://1.bp.blogspot.com/-Z1n4YPtIT04/XQT19monPxI/AAAAAAABdxY/mbD0RkqIAj8GB_qUPqEL48qYzwNQT7rGwCKgBGAs/s640/042.JPG)
![](https://1.bp.blogspot.com/-enSeEFu1x2s/XQT19gPGCRI/AAAAAAABdxY/el9MFb2PonU_wNSpFg6LprpLheKb9F3HQCKgBGAs/s640/043.JPG)
![](https://1.bp.blogspot.com/-kLRjMRdcjFw/XQT19t9ffJI/AAAAAAABdxY/awjT1FmuFRQozvosHfpkft6lGIRKyGm2gCKgBGAs/s640/044.JPG)
![](https://1.bp.blogspot.com/-WouvDFSFJYY/XQT19gXwjqI/AAAAAAABdxY/JtTzVvbYGI8PQ_8ADtHueaHshd19QRqXwCKgBGAs/s640/045.JPG)
![](https://1.bp.blogspot.com/-SyZAtJL8Zoo/XQT19vPNTrI/AAAAAAABdxY/tXmzWtqHQ14pvMkOkxR0QOI-u6PhLTgHQCKgBGAs/s640/046.JPG)
一回後…熄滅了…
![](https://1.bp.blogspot.com/-yYJ2-4yUpzw/XQT19vm_JsI/AAAAAAABdxY/nBTwx_TmQh8R61BFi0BfsYstZyl9RcIvwCKgBGAs/s640/047.JPG)
重新插拔電源後…,也還是有啟動…
只是這回就閃亮一下就熄滅,隨即有一個聲音一直在重複著…
這個聲音其實就是電源板啟動時,繼電器線圈通電,接點閉合、再跳開的聲音,簡單說:接點一直在開、關當下,記住喔…,它不是急促在啟、閉,而是間歇性越來越緩慢…,也就是說越來越不力啦…
![](https://1.bp.blogspot.com/--F7a3QLgxfU/XQT19rhPk9I/AAAAAAABdxY/Yeey-zSOJWgINg9nu3uB3ehAmTWx94RwwCKgBGAs/s640/048.JPG)
當然背光也是持續著亮、滅……,到最後也不亮了…
![](https://1.bp.blogspot.com/-We0Lbig3N5s/XQT19uEPxTI/AAAAAAABdxY/0F0fEiNJyuUoWklEFBNBfG35e4ziA9gxwCKgBGAs/s640/049.JPG)
![](https://1.bp.blogspot.com/-reM4Zz5n7MI/XQT19vv0CFI/AAAAAAABdxY/kjLej5nAGDQlWw4xrKBymCjoScSzd7S-QCKgBGAs/s640/050.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~
來看今天的主角:Westinghouse(懷特西屋)型號:LC-40S200B
![](https://1.bp.blogspot.com/-8eHHP8Dak4w/XQDMnXsAq0I/AAAAAAABdrQ/GPTmyy3GSBgeIKgQHk3OZM91J8rV1iw7QCKgBGAs/s640/099.JPG)
![](https://1.bp.blogspot.com/-YlWNzDnfqmE/XQDMnbU6X4I/AAAAAAABdrQ/QUb5cE9NTog_IFIkEHt2NHc_YXhC6-7zQCKgBGAs/s640/100.JPG)
這是它的內部電路分佈:
![](https://1.bp.blogspot.com/-NQunZiiqo4E/XQDMnbdX_XI/AAAAAAABdrQ/y7qM5YfirVAsrT3Awy_8VeZU2NPPEFbDACKgBGAs/s640/101.JPG)
![](https://1.bp.blogspot.com/-FJ3qBINFPIE/XQDMnVUHW3I/AAAAAAABdrQ/leY2rHaFRssrCXyrTWnVQVA-uaVDOdvNwCKgBGAs/s640/102.JPG)
![](https://1.bp.blogspot.com/-_88u583pnuo/XQDMnWwFdYI/AAAAAAABdrQ/nju57CLB0tsGZO9k_GdG1_mm8eGU_AiyACKgBGAs/s640/103.JPG)
![](https://1.bp.blogspot.com/-l0ccT1Z-mYo/XQDMnYUEpzI/AAAAAAABdrQ/ervxFyyx9Rol06BOwVR4kgBuNLhX4CqUQCKgBGAs/s640/104.JPG)
現在有看到主板上,許多DC TO DC線路上的濾波都已經大肚子…
不要想得太簡單,會不會市電容換一換就好…,要繼續看下去…
![](https://1.bp.blogspot.com/-cmRRCgVNX2o/XQDMnb6nhpI/AAAAAAABdrQ/rlRT9jJ0lHEQejTBNo-voV18Cj2XLPjCACKgBGAs/s640/105.JPG)
這是它的故障現象:
送電有紅燈號,啟動後轉換成綠燈…,看來一切都OK,似乎濾波大肚並無多大影響………???
![](https://1.bp.blogspot.com/-hQxMlGFy0hc/XQDMnd09IZI/AAAAAAABdrQ/1Bf00kPxv708q6HnP9gvokG2Mj01rIjJgCKgBGAs/s640/106.JPG)
![](https://1.bp.blogspot.com/-6vyZ5rPqzDE/XQDMnYZDCxI/AAAAAAABdrQ/1Km2J1tsCIY6vG4fa2R9C6XGUFK8rgHjwCKgBGAs/s640/107.JPG)
非也…
現在雖是啟動綠燈號,應該亮起屏幕…,可惜囉…沒有亮屏,背光並沒有被驅動點亮…
![](https://1.bp.blogspot.com/-bwt7dqBpBkA/XQDMnXu0WVI/AAAAAAABdrQ/vq5aL9BZ-pQ1qVyCHXvk2wyo7_0IGUuMgCKgBGAs/s640/108.JPG)
![](https://1.bp.blogspot.com/-FsYZaoHGCGY/XQDMnbKftII/AAAAAAABdrQ/Oy1NAiNvFW8uGcHPlHLoJ7ACrxGh4y_CACKgBGAs/s640/109.JPG)
這兩塊是首要處理的重點…
![](https://1.bp.blogspot.com/-uvrMW6TqjqQ/XQDMnc_vI4I/AAAAAAABdrQ/LR-WpZwteEIlVGYkXYLbzNXi81MzlxAmQCKgBGAs/s640/110.JPG)
![](https://1.bp.blogspot.com/-iq4FoWOovw0/XQDMnbc5pjI/AAAAAAABdrQ/f0oOZbMtclMc5uIYiAHkXzuAuI67BknegCKgBGAs/s640/111.JPG)
先把主板上DC線路的濾波都更新…
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~
來看今天的主角:TECO(東元)型號:TL3233TR
![](https://1.bp.blogspot.com/-vdWWGA-MTtg/XPeXuPwW0LI/AAAAAAABdc0/9Sjrii_mqtMcpnNEarCID0eOYvO8duvMwCKgBGAs/s640/001.JPG)
![](https://1.bp.blogspot.com/-LjCg7yeWeWs/XPeXuGiB98I/AAAAAAABdc0/3_4Llma8Y-ArybNkVYj0GD9KbqzOBT7_ACKgBGAs/s640/006.JPG)
這是它的故障現象:
送電啟動了(綠燈號亮起)…,可惜…,屏幕並沒有亮起背光…
![](https://1.bp.blogspot.com/-0hXrykKYga0/XPeXuOkvfkI/AAAAAAABdc0/kc4Lr6kocKEpuaF1CvGL6NvsUXHkiKz9ACKgBGAs/s640/007.JPG)
![](https://1.bp.blogspot.com/-3SLa_WXFIOA/XPeXuFWU8_I/AAAAAAABdc0/vrOSAVv4E_YGAJsF6fn5ZSB7Zkl3GOpsACKgBGAs/s640/008.JPG)
我拆解背蓋後…
映入眼裡的是,這等畫面…送往背光驅動的導線是被拔除的、其中PIN座裡的一條藍線,更是被剝離開了PIN座…
這下…腦海中產生了許許多多的???…
![](https://1.bp.blogspot.com/-lpeM8mEAWjQ/XPeXuEnh7LI/AAAAAAABdc0/pg4LzIk8T8QB31yJS_SjigpXA5LPw25FACKgBGAs/s640/010.JPG)
![](https://1.bp.blogspot.com/-TkVagTPT83I/XPeXuHRJCBI/AAAAAAABdc0/KstvmCWTg8kCWmneIeaYusLaEhNYNloIwCKgBGAs/s640/011.JPG)
我將導線回復成原貌…,並送入背光驅動板的母PIN座中…
![](https://1.bp.blogspot.com/-imp7gSZaaa8/XPeXuHmthKI/AAAAAAABdc0/MxAx7X1V_vgtW23Ki-SoxNfFGyqXSqA4ACKgBGAs/s640/013.JPG)
我有重新送電再測試…
不用說…,當然是依舊不亮屏…,並且獲得了背光工作的兩個工作電壓數據…
好像是工作電壓有問題…?
![](https://1.bp.blogspot.com/-fxMYpCuw4cQ/XPeXuJOuL_I/AAAAAAABdc0/EYdjp-FPxVcGWXKhm5-RKnFOU2MiXv_JQCKgBGAs/s640/014.JPG)
![](https://1.bp.blogspot.com/-uymBuc_09RQ/XPeXuLRG9EI/AAAAAAABdc0/iY1RgKVD7Jsf_embMI4PoJa1A7PFrEaWwCKgBGAs/s640/018.JPG)
沒關係…
我取來另一塊類似的電供板,再次試點…
![](https://1.bp.blogspot.com/-gbsJTW2698I/XPeXuDZ56fI/AAAAAAABdc0/su4NpR4A4V4EHnEbxTBjqzafMM_tRSxBwCKgBGAs/s640/019.JPG)
![](https://1.bp.blogspot.com/-oqTkWJ6jYyo/XPeXuMzgB0I/AAAAAAABdc0/C9xES5sg4sIuVICO0p3-wBydLb7gTvOWgCKgBGAs/s640/020.JPG)
atunPCLCD 發表在 痞客邦 留言(0) 人氣()