Back with good news . I connect 3.3V from an external p.s.u and video work.
Had to replace the LA8013 defective with one from old board, did that and work . Thanks for feedback . Problem solved.
mars11
Member
Last Activity: 09-13-2022, 06:32 PM
Joined: 01-11-2017
Location: jacksonville florida
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Re: LC 65LE643U no video
Back with good news . I connect 3.3V from an external p.s.u and video work. Had to replace the LA8013 defective with one from old board, did that and work . Thanks for feedback . Problem solved.
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Re: LC 65LE643U no video
I think about that .I will try and post back. Found the actual part name LA8013ACD.I search for it with little success.Leave a comment:
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Re: LC 65LE643U no video
Not yet ,on replacement board i have 60 day warranty and if i do that probably i will void that. waiting for a service manual found on "paradise manual.Leave a comment:
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Re: LC 65LE643U no video
I mention that i am missing a 3.3v on the replacement board (main), i am not sure how that happen. it is the UP18, that circuit should drop 5v to 3.3v and feed UP4 3.3v to 1.8v .serial on circ. is RSAIH or RSAHU ( different board). Can't find this online any suggestion ? that circuit is defective for sure.Last edited by mars11; 01-23-2017, 06:49 PM.Leave a comment:
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Re: LC 65LE643U no video
Unplug left side bottom cable ( to screen) that side of screen remain dark and the other half get white . With the right side disconnected, right side screen remain dark the other side get white.
when i disconnect the top cable (from main b.) left side , the screen get white . when disc. right side- screen stay dark(that is the side that power the t-con). -Last edited by mars11; 01-23-2017, 06:51 PM.Leave a comment:
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Re: LC 65LE643U no video
With the old board i did not have sound or video and the screen is changing white slowly ,the same with the replacement main b. even i have sound. I change t-con board and nothing change. Yes i have 12v after fuse on both t-con . Not sure if the white screen is the the result of defective main or i need to look/check something else before i decide to return the board. hard to believe that both t-con are defective but possible. Trying to find service manual also .Tomorrow i check more on main board thanks .Leave a comment:
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Re: LC 65LE643U no video
With the old board i did not have sound or video and the screen is changing white slowly ,the same with the replacement main b. even i have sound. I change t-con board and nothing change. Yes i have 12v after fuse on both t-con . Not sure if the white screen is the the result of defective main or i need to look/check something else before i decide to return the board. hard to believe that both t-con are defective but possible. Trying to find service manual also .Tomorrow i check more on main board thanks .Leave a comment:
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LC 65LE643U no video
Got this tv. sharp lc 65le643u without video or sound . Power up and back-light work. Screen start to get white from center to edge 3-4 seconds after start.
My dilemma start after i replace main board (used) based on fact that was no sound, no video. Replace board and i think tv start when i plug in the power cord.I can see on screen (right upper side) text" no signal" and i turn back to plug a hdmi cord . When i look back i can see the screen get white again ,still
with this board i have sound .
i order a t-con board that does not change anything . anybody run in...Last edited by mars11; 01-22-2017, 11:09 AM. -
Re: Sharp 65le643u no video
I finely upload picture of the main and t-con boards . This is my first tread i see that without the pict . it is hard to get a feedback and i understood. Appreciate your feedback.Leave a comment:
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Re: Sharp 65le643u no video
[url]https://www.badcaps.net/forum/attachment.php?attachmentid=149082&stc=1&d=1484690609[/url]
[url]https://www.badcaps.net/forum/attachment.php?attachmentid=149083&stc=1&d=1484690623[/url]
[url]https://www.badcaps.net/forum/attachment.php?attachmentid=149084&stc=1&d=1484690623[/url]Re: Sharp 65le643u no video<br /> <...84690623[/url]...Leave a comment:
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Sharp 65le643u no video
I have a sharp LC 65LE643u that i am trying to repair.
I got the tv. with no video ,no audio and the screen slowly get bright white from center to edge.Voltage for m.b. (19v) is 19.46v and m.b provide the 12v for t-con also.
Based on no video/sound i order a (used) replacement board .
Replaced the main board, tv. start and i can see on screen no signal .I turn around to plug a hdmi cord and when i turn back to screen i see the screen getting white . With this board i have sound . Just to be sure i order a t-con board that make no difference.I am not sure if the main board... -
Re: New Members - please post your introductions here
Hi , i am from Jacksonville. I found this site and i read some very good and technical reference regarding tv. problems. I use to repair tv.and audio some time ago before lcd panel became the normal. I have a sharp set that i am trying to repair.Leave a comment:
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Re: New Members - please post your introductions here
Hello all. I am passionate about electronics and repairing is my hobby too.Leave a comment:
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