哈囉~我是曾仔… 大家午安!大家好~
嗨…,又好久不見了…,進度永遠趕不上啦…
來看看今天的主角:LG(樂金)型號:50LA6200
![](https://4.bp.blogspot.com/-1b6z7ES2n-k/WfZzwE7n4SI/AAAAAAABK6Y/_WlkWl0y4C47wht5NWtNyYWV7VakUrUPQCKgBGAs/s640/092.JPG)
![](https://4.bp.blogspot.com/-dOKWX8HEUrU/WfZzwA73pBI/AAAAAAABK6Y/p-qNqGbB1BI7wxjTZNpX80xX3SMUepe_wCKgBGAs/s640/093.JPG)
這是它的內部電路分佈:
![](https://2.bp.blogspot.com/-7ew_T6dDzR4/WfZzwJevG0I/AAAAAAABK6Y/jcWhb8lSzxgdCKG5J8vQTjUQNyZC54_LgCKgBGAs/s640/094.JPG)
![](https://1.bp.blogspot.com/-eW9jJF7r8rU/WfZzwA4QnxI/AAAAAAABK6Y/Et5ai4qcZVwy-xhM_NhQPu1KmynbO2oKACKgBGAs/s640/095.JPG)
![](https://1.bp.blogspot.com/-Oata0DFhrnA/WfZzwJvQMoI/AAAAAAABK6Y/5-vBhfGUBT8BNEyA0OQbXKaEECNOFyapACKgBGAs/s640/096.JPG)
![](https://1.bp.blogspot.com/-d0-TQiUafgc/WfZzwM8GLUI/AAAAAAABK6Y/TknzPU8CvrYyQqWkgfhIXxafb0o7DQ7-gCKgBGAs/s640/097.JPG)
現在來送電測試!
送電有待機燈號,啟動後會熄滅(轉變成無燈號)
![](https://1.bp.blogspot.com/-v0ww1zndoTA/WfZzwHnL9YI/AAAAAAABK6Y/i5VkxBhN_YY6ug9j0XgO_gWOoKy3ux7QwCKgBGAs/s640/099.JPG)
![](https://4.bp.blogspot.com/-MkRvjVB6ef8/WfZzwLvlLuI/AAAAAAABK6Y/3oqeSG_5Kmk0xSoaw4qZhtenfbQ181_OACKgBGAs/s640/101.JPG)
這時…是該亮起背光顯示影像的…
現在當然沒有,這就是本機要處理的故障現象,正所謂:『開機暗屏』是也…
![](https://1.bp.blogspot.com/-z3Cd0HXmfrA/WfZzwPLoUGI/AAAAAAABK6Y/b_BDd26zC48ec3qnfCQA-1joKJ3DB9LlACKgBGAs/s640/102.JPG)
這些機種百分之99,都是背光故障多…
不過…還是用測試儀查量看看…
你有看到的,一組電壓是跳動的,另一組則是正常、穩定的電壓…
![](https://3.bp.blogspot.com/-F211soGPBiI/WfZzwCv2J4I/AAAAAAABK6Y/gL5t1307SXI7g0JlY26MhAcIow9MaZJTQCKgBGAs/s640/103.JPG)
![](https://1.bp.blogspot.com/-t1OHrT9FQAA/WfZzwMZDNnI/AAAAAAABK6Y/5qipDETauW0hUBt6-Y2DiHm_310-kR3oACKgBGAs/s640/104.JPG)
![](https://4.bp.blogspot.com/-Jlej01EZ290/WfZzwL_dXRI/AAAAAAABK6Y/lQtYL8Kl4T8_Y7E-64O7Ob0Vq2DTj-XFQCKgBGAs/s640/105.JPG)
毋庸置疑……,拆面板查修燈珠就是了…
請記住…拆解面板更換燈珠、或燈管都有一定存在損傷玻璃基板的風險,我們維修人緣不負責任的,要負責就別拆了…,當然!我們也不想搞壞它,只是就是有風險的,要先聲明的…
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哈囉~我是曾仔… 大家午安!大家好~
今天來看這一台液晶電視維修,是底下這一台『大白』,其廠牌、型號為:
CHIMEI(奇美)型號:TL-55LV700D
![](https://2.bp.blogspot.com/-0991imtmgeI/We6la-CSqjI/AAAAAAABK2A/nh5GFjY4ajkhoWi-YfJOdONIfcYkBZU1wCKgBGAs/s640/002.JPG)
![](https://1.bp.blogspot.com/-Eh_HRK6EuOI/We6laySufgI/AAAAAAABK2A/qGYnyMqYkK82MRAgWktOip4RRaKF8FM9QCKgBGAs/s640/003.JPG)
這是它的內部電路分佈:
![](https://1.bp.blogspot.com/-LTqxuUGKJw0/We6la_jTacI/AAAAAAABK2A/2FfX8lgz0SUXYqo5NXAt6H_S-VifkO34wCKgBGAs/s640/004.JPG)
![](https://1.bp.blogspot.com/-VDssBdb-bIg/We6la7yy7FI/AAAAAAABK2A/6SW0WOqqQrwQR4yFaqY-q2fwzUvyW8K0ACKgBGAs/s640/005.JPG)
![](https://2.bp.blogspot.com/-8dlevW6lxGk/We6lax8mgvI/AAAAAAABK2A/c4zhl_r_A3MDxgm0NV_BvcbRq3J4GAwxgCKgBGAs/s640/006.JPG)
![](https://3.bp.blogspot.com/-fTd_J0eutYg/We6la16BR8I/AAAAAAABK2A/XXn597H10rgHirn8iMkP__UpuRINVI6xQCKgBGAs/s640/007.JPG)
![](https://1.bp.blogspot.com/-u28MRCunSFY/We6la-MbMAI/AAAAAAABK2A/ha2iVys7FsEJ_kX9Ze-Zm25LAFdJzXk6wCKgBGAs/s640/008.JPG)
送電無反應…
先來查量一下它的待機電位輸出否?
![](https://1.bp.blogspot.com/-mZo6D1u8Up4/We6layBznhI/AAAAAAABK2A/YS6-iHODUXce2LzhnabYmVCY_C_SA-GEACKgBGAs/s640/009.JPG)
你有看到的…,現在電錶量測試是『0』電位輸出…
![](https://1.bp.blogspot.com/-ZXRM_7l8THk/We6laxCp8cI/AAAAAAABK2A/z_mA91JKIGgx6vdXMEJDfcyH9BrA_dv5ACKgBGAs/s640/010.JPG)
不用說…解下電供板查察囉…
![](https://2.bp.blogspot.com/-MWzT1__3mAo/We6la7oXcKI/AAAAAAABK2A/Ux3Efl5em4EhFjqzdK4zeTrkDZKhWRhswCKgBGAs/s640/011.JPG)
![](https://2.bp.blogspot.com/-_pxIX9v2ycg/We6lay3jqPI/AAAAAAABK2A/38lbmsc1LBAqHM8WDNuMHCrzshdqh4WpwCKgBGAs/s640/012.JPG)
經過一番查檢、汰換……
再次尬回機器送電測試…,你看看已經有了待機電壓…,當然也會亮起待機紅燈…
![](https://3.bp.blogspot.com/-jVMutqnH7RA/We6la-rh4iI/AAAAAAABK2A/vFH86oqmjrYlwFdV1-W6x84BXsgTW5D7wCKgBGAs/s640/015.JPG)
![](https://3.bp.blogspot.com/-kpkUFIb4fEA/We6la8Y_T-I/AAAAAAABK2A/SV8lYA0Hy9YR1eOBwxR6cRoOlwaBGzxdgCKgBGAs/s640/016.JPG)
啟動OK…背光有亮起,影像顯示也正常……
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哈囉~我是曾仔… 大家午安!大家好~
嗨…又好久不見了…,咱們不多說了,趕緊來看維修文…
今天來看這一台,今天來看這一台:HANNS.G(翰視奇)型號:HG281
![](https://2.bp.blogspot.com/-qS9C50Vtayo/Wehd36980BI/AAAAAAABKxk/iomzkI4KvmMWrZMUZavzYsG3A5cOh_WBQCKgBGAs/s640/008.JPG)
![](https://4.bp.blogspot.com/-vVv8uO0Dr8A/Wehd38EW_qI/AAAAAAABKxk/MDCmqwvm9JYql2kLDst5Gq-4C9QGZVp8gCKgBGAs/s640/009.JPG)
這是它的內部電路分佈:
![](https://1.bp.blogspot.com/-fJpSxmPPvUM/Wehd35f7QcI/AAAAAAABKxk/4ujKpC8q_eorsi3TzrMvTPMFp-QvqEEtwCKgBGAs/s640/010.JPG)
這是它的故障現象:送電啟動後先顯示了一陣子白屏現象,爾後…,又出現了一些微亮的色彩線條…,沒出現色彩線條,個人會認為比較好醫治,有出獻了,這…恐怕又是難以治療的面板故障問題…
![](https://3.bp.blogspot.com/-XZJHlwgf42g/Wehd32ocpeI/AAAAAAABKxk/rAlj6S-RWB8gc0mT48ajNQD9pT6UlmnpwCKgBGAs/s640/011.JPG)
![](https://3.bp.blogspot.com/-NV3On7z7OEc/Wehd3-xLg3I/AAAAAAABKxk/OJtcqx1IV2cYFWeiH4bBo2cIQfePPfK3ACKgBGAs/s640/012.JPG)
那就來治療看看……
![](https://3.bp.blogspot.com/-jghT070nXuw/Wehd384UkrI/AAAAAAABKxk/s6JfPAlIrJUDahm6ft9FDb0h0N28G0W3wCKgBGAs/s640/013.JPG)
都可以啟動,也能亮屏…,通通不必查檢,直接殺到終端顯示電路部位做查檢啦…
![](https://1.bp.blogspot.com/-NNWQchCq4_8/Wehd37UP4bI/AAAAAAABKxk/px2G-x7vAogW_4JbCwVxJPJDvSpoTowpACKgBGAs/s640/015.JPG)
『終端顯示電路』我也查不出所以然…
於是乎繼續挺進…,前往到面板部位做交差查檢……
![](https://1.bp.blogspot.com/-xaJIz3L3Xfg/Wehd355O5GI/AAAAAAABKxk/gnmHW1at7j4U9KvKrLmt451ZmnYGycXYACKgBGAs/s640/016.JPG)
![](https://3.bp.blogspot.com/-IXbt7SD4YJQ/Wehd32E0KMI/AAAAAAABKxk/GT3nR7YnJsYjxgbx8giP51mX-19OvzTRgCKgBGAs/s640/017.JPG)
![](https://1.bp.blogspot.com/-ey3ECJ8VXSU/Wehd36ZqpCI/AAAAAAABKxk/MhcaHLLtCyYMCMYCNCjcgnDK7y6ZoaI0wCKgBGAs/s640/018.JPG)
![](https://1.bp.blogspot.com/-lYRjRAV6s0M/Wehd3wDAyDI/AAAAAAABKxk/bAuuDTsmMdUjkWZfPFYWyj6PNqt9F1ygACKgBGAs/s640/019.JPG)
於是乎…
大膽的給它開刀下去啦…
![](https://3.bp.blogspot.com/-CYXFNPkwC_I/Wehd32TPmII/AAAAAAABKxk/yFBleIuBdqwusMtTLYUHRNZN5hYZPsFQwCKgBGAs/s640/031.JPG)
![](https://1.bp.blogspot.com/-MKU5jbII71s/Wehd38UFBKI/AAAAAAABKxk/ZasVSf3MxH8hM9ocI6o6NTPFMbo-8HHRgCKgBGAs/s640/032.JPG)
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