Re: Another Samsung Plasma(PN59D530A), audio but NO picture post
Case closed....
Wife got up on middle of the night and bumped into some stuff.... Down goes the plasma.
Should have worked on it quicker. Guess I have to many tv projects! From 5 projects to 4 lol....
Sorry for no conclusion....
Thank you to the guys at HEGE supporting Badcaps [ HEGE ] [ HEGE DEX Chart ]
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Re: Sharp 70" First Failure Post Side-Tab Removal ?
Yeah, its awesome they can do it, and I can imagine its very precision (I hate dealing with the huge lcd panels lol)... But yes, prohibitive for most. Maybe if they were newer or custom LCDs... doesn't seem worth it otherwise!
Neat to know its available however....
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Re: Sharp LC-70LE650U Dark Spot In Screen
Disassemble screen and remove frame around edge of panel, remove the tabs from the offending side, like peeling off a bandaid or tape. It is irreversible so do your own research, seems like your right side is bad. Lots of threads in here on it. Vizio/Sharp screens....
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Re: Another Samsung Plasma(PN59D530A), audio but NO picture post
Haven't yet done the lightbulb test to rule out the PSU... Any videos or pages with examples of this? Should I just solder a wire from one bulb to another more or less? lol.
Anyone have any thoughts given the issues thus far though?
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Re: Sharp LC-70LE660U - Sound, No picture, Picture for split second
Is this one with the circuit board along either side of the TV? if so, disconnect the left side at the bottom where it connects to the lower buffer boards (or whatever they are called).
See what happens then..? First glance, this seems like maybe the sharp/vizio bad panel... which would require removal of the tab bonds on problem side of the tv.... do your research before this step! Non-reversable. Fixed a 70" sharp this way however.
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Re: Another Samsung Plasma(PN59D530A), audio but NO picture post
Ok took some measurements to try and get another baseline.
Vs jumps to over 400v on startup before dropping
Va jumps to 101v before dropping
Vsc on y main 0 always
Be(VB) on x main jumps to 216 then drops
Disconnected the buffer board to see if vsc would come up again. It did not. This also created another issue. Tv started to boot as soon as I plugged it in, looping and crashing after 5 times or something.
Disconnecting the cable to the x main speed the...
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Re: Another Samsung Plasma(PN59D530A), audio but NO picture post
Confirmed with a co-worker that those RF1501's should show continuity on 1/3.
So I'm going to start everything over from scratch this weekend. Take full and proper measurements, etc. I may grab two incandescant lightbulbs to do that trick, my VS rockets over 400v and then shuts down with no load.
The only way I can get the heartbeat to function properly is to disconnect the Y-Main at that end from the control board. The light then beats normally. Otherwise, its' slow long blinks.
...
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Re: Sharp lc-70c6500u
Is pic 4 supposed to be black? Leaving towards left side failure and tab removal... I'm a newbie to this though.
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Re: Sharp Aquos LC-60LE600U
Disconnect the two tabs on bottom of tcon one at a time, turn on set with just one connected and see, then repeat with the other side only connected.
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Re: Samsung PN42C450 B1DXZA Doesn't Power On
I used up some cpu thermal paste... I need to get more universal stuff for these repairs though. I would think its ideal to apply more thermal paste.
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Re: Another Samsung Plasma(PN59D530A), audio but NO picture post
Looks like the RF1501 are operating properly...? pins 1 & 3 are connected right? Then they get switched to pin 2? So as long as pin 2 (the large part) is not shorted to the others, they are presumably operating correctly?
Sorry blind you-tube tech with no electrical experience doing a learning curve....
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Re: Another Samsung Plasma(PN59D530A), audio but NO picture post
These... Mofsets? On the board all appear to share continuity, does that sound correct?
Basically I'm back to audio and no visual. Replaced three little ceramic caps on y sustain due to issues with other board in past but nothing.
Need to get some rest and think on a fresher mind lol...
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Re: Another Samsung Plasma(PN59D530A), audio but NO picture post
More updates...
Tried to bypass the mainboard and do the jumper screen test... It did force the TV on, relays were clicking, heartbeat going slowly then shutdown. Screen had a soft backlight Flash....
Measurements from PSU to main:
Ps on 3.25v
Stby 5.26v... nothing else at the terminal all 0v. Should 15v be active or is that only once started? If stby is going to mainboard, wouldn't the red light be on front?..... Ugh. I'm an idiot. Forgot too hook the sensor light...
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Re: Another Samsung Plasma(PN59D530A), audio but NO picture post
Well, dunno what I did now lol... Not starting at all now. No standby light. Have power at PSU, ps-on had voltage to main but stby is 0...
So maybe my PSU is incompatible/fubar.
Is there a typical component that may fail affecting the standby voltage through PSU? Will search for more threads now that my issue had evolved/de-evolved.
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