Re: Panasonic TC-P55ST30 SNAFU'ed, SC board blown, I think...
Thanks .....a good report is coming soon !
Thanks .....a good report is coming soon !
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Re: Panasonic TC-P55ST30 SNAFU'ed, SC board blown, I think...
Got everything re-installed last night after testing the SC41, SC42 & SC46 connectors as well as the flexi-cables that attach to the SU/SD boards. Also did the isolation test with SC50 jumpered. Nothing seemed amiss, so I plugged it all in proper and gave it a go... SUCCESS!! TV came on and displayed properly, thanks to Terryfictv, tw2005 and flocko for your assistance. I remounted the heatsinks with thermal tape and silicone, as well as adding sinks to the other three transistors that did not have them. Time will tell if the repair holds, but seems to have been the fix for now. Testing the transistors on the bench showed three of them to be trashed. The diodes were good and the other three trans did not show shorted tab to pins 1 or 3. I'll keep them as spares for possible future use. Thanks again all!Comment
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Re: Panasonic TC-P55ST30 SNAFU'ed, SC board blown, I think...
Awesome! Well done, MTWallet. See you next time!Comment
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Re: Panasonic TC-P55ST30 SNAFU'ed, SC board blown, I think...
Well, unfortunately the repair didn't hold. After a few more hours on the TV, there was a nice sharp pop last night, and back to solid red LED, or 14 blinks if you hold down the power button. I will tear it down again and see what's up. If its the SC board again or something else.
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Re: Panasonic TC-P55ST30 SNAFU'ed, SC board blown, I think...
The diodes in the circuit that is blown should be replaced in case they were stress damaged. Also, did you change the mounting hardware and clean ground connects of black hi resistance junk ? ( use tool or scrape with razor blade ? ) Did you snug the mounting screws tight ? Did you confirm SS board has no shorted parts by test not by guess ?
TerryLast edited by Terryfictv; 07-27-2015, 05:47 PM.Comment
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Re: Panasonic TC-P55ST30 SNAFU'ed, SC board blown, I think...
Two diodes and 6 transistors were replaced, that is what was in the kit. Used new mounting hardware which had the lock-washers on them. I used a fiberglass pen brush to clean the ground contacts where the screws attached the board to the main chassis of the TV. The only thing done with SS board was to confirm that after SS11 was disconnected, that there was no direct short on that connector at the SS board.Comment
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Re: Panasonic TC-P55ST30 SNAFU'ed, SC board blown, I think...
Check Q600. If it's bad your IGBT's will blow again. Also check R608. If it reads much lower than 15K ohms, Q600 is bad.Comment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hi folks,
I'm new to this forum. So my trusty 17-year-old LG 47" LCD recently died. As I was booting it up, I heard a hum followed by a loud bang, sounds of pieces flying around, and loss of power to the unit. Inspecting the PSU, I saw two obvious problems: a blown thermistor (bang + flung pieces) and a visibly bulging main cap. Inspecting as many components as I could with my Fluke MM, I diagnosed that the following components on the "hot side" of the board were also bad: one of the 2 main MOSFETs, main 8A fuse, small cap (25V 47uF) connected to main caps, and a blown... -
I did not have any 27uf @ 50 volt capacitors but one nice thing is that it has enough room for two capacitors in parallel a 22uf and a 4.7uf @ 50 volts 22 plus 4.7 equals 26.7uf which so very close to 27uf I will show some pictures of it sometime tomorrow
This is one of the shit est boards I seen in a very long time and it was the daughter board the traces just lifting off the board I had to use the capacitor leads to repair the the traces and the main board is not any better because I had to repair several traces for the daughter board to the main board
After all of... -
I have a Panasonic TC-P54VT25 that will power on and prime the display but there is no image at all.
The panel is primed as there is a slight glow from the entire panel. This means the problem should be logic related. The service manual also confirms this and recommends replacing the A or the D board.
I have tried to get the TV to display the test sequence but I have been unable to and I don't even know if this TV has a test sequence or not. I tried following tom66's instructions in post #3 on this thread https://www.badcaps.net/forum/showthread.php?t=26790. There was... -
Hi everyone!
I happened several times, in the search for help from the web, to consult this very interesting forum.
So I decided to sign up and I intend to participate actively by making available my knowledge and experience on the subject, I'm a new user but at the same time I'm old in the sense that I have 4 decades of experience in repairing and designing electronics but above all I'm a great passionate about the subject.
Having said that I come to the gist of my post on the forum as the title suggests.
For my passion for technology I'm now collecting several...
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