Re: Samsung LN40A630M1FXZA no power
Thanks - I buttoned it up a while ago and am taking it to the recycler. I wished I had more time but I do not plus boards are a little more than I want to spend online. Appreciate the help and the offer though!!
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Re: Samsung LN40A630M1FXZA no power
I metered each side of the traces to ground and then (thought I) placed the cap accordingly. I used a simply electrolytic cap.
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Re: Samsung LN40A630M1FXZA no power
Placed a 47uF 25v cap at C102. Same symptom. Thanks for the help.
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Re: Samsung LN40A630M1FXZA no power
Thanks Budm. It's a BN44-00198A. Hard to use the power button since it's one of those touch sensor dudes. I have discovered a couple of things. I have the 13V and 5.3V that the TV calls for. However - something odd is happening every ~20 seconds (like stopwatch predictable). The voltages change on components. This board has a cooling fan. If I meter the fan line I get 9V constantly except for the complete loss of voltage every 20 seconds there. Really seems like a PSU problem at the moment. I'll grab ALL the pins and voltages in the morning.
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Samsung LN40A630M1FXZA no power
Just grabbed a Samsung LN40A630M1FXZA. It looks to be in good shape. Got it all apart and don't see too much going on other than two disc capacitors that look a little warm. The front power LED just flashed about once a second. The previous owner claimed that the set would work after about 30 minutes or so for quite a while until it basically gave up the ghost. I've already tried heating the capacitors on the cold section of the PSU board and it didn't work. I did probe the power connectors and voltages appear to be there on some pins. ShopJimmy has a capacitor kit for this set. Is this a slam...
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Re: Vizio E601i-A3 horizontal line and funk
So when I turn the TV on and the logo displays the left hand side is washed out right at the beginning of the panel. It still needs the t-con as the rest of the video looks horrible. For $20.00 a t-con is a cheap deal. As of now I'll do the t-con while I research tab bonding repair/workarounds....
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Vizio E601i-A3 horizontal line and funk
So I picked up a Vizio E601i-A3 for a REALLY low price today on Craig's. The advertisement for it showed what looks a LOT like T-Con board funk as the colors are off and there is some very odd funk going on. This is a very large screen and I'd love to use it at home. The images on Craig's did not show a horizontal line. Now that I have it home and on my work bench it has a line in it as pictured in the attachment.
Is the panel on this TV wasted? Is there any kind of remedy for this? The T-Con boards are cheap on eBay and I'm hearing of a recall on this TV anyway.
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Re: Synology Server motherboard repair
I can't recall how the CPU was mounted on mine last time I had it open. Is it BGA or can you see the solder legs on the outside of the chip? If it's BGA you might be able to do a cheap toaster over session and then put a heat sink on the CPU?
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Re: Sharp LC-C3242U Repair Thread
Project update. D7907 was indeed bad. Got my new diodes today. Got the TV back up and running to discover that I had purchased a TV with a cracked LCD panel. At least I only paid $10.00 for this one. PSU and Inverter board going up on eBay to see if I can make a little of my money back.
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Re: LG 60lb5200 LCD TV - No Power - No Standby Light
I don't have any experience with this particular TV but some of my Navy Avionics course training is coming back to me (it's been 26 years since A school). I'd be looking closely at the diodes that feed into the transformer. They might be part of a rectifier circuit that drives the transformer that feeds into the DC/cold portion of the board. Maybe one or more of them died and they just "look" okay?
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Sharp LC-C3242U Repair Thread
So I picked up a Sharp LC-C3242U that is DOA. Pulled the cover off. Found a Delta DPS-178AP A power board running the show. No standby voltages on the DC side of the board. TV does not power on.
Did some searching here on the forums to find that D7907 is the diode that typically fails. Sure enough - pulled my D7907 out and it flows both ways. Will likely find the diode here at my local electronic supplier on Monday. Posting PSU pic of location and diode information for further reference.\
Bad diode - [url]https://www.mouser.com/Search/Refine.aspx?Keyword=1N5383[/url]So...
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Re: Sharp LC-32D42U repair
Found this thread searching for my TV. Found 1n5383b on Bing/Google to be in the D7907 position. If anyone does respond to this thread where is D7908 on the Delta DPS-178AP A power supply board?
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Re: Another Vizio VW42LHDTV10A Inverter thread
Still reading and learning. Measured my MOSFETs with a VOM tonight to see how they reacted. All of them reacted the same when measuring resistance from drain to source. However, one MOSFET on the slave board measured 0 Ohms from gate to source while none of them rest of them did this. Is that sign of failure?
[url]https://cdn.badcaps-static.com/pdfs/5b94d29364acddafb9f8bec50f07a0bb.pdf[/url]Re: Another Vizio VW42LHDTV10A Inver...VOM tonight to
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Re: Another Vizio VW42LHDTV10A Inverter thread
I replaced those caps with some used ones that I had laying around. 470uF@35 VDC came out and I put in 470uF@25 VDC. Am planning on ordering the right caps. The IC does not look burnt to me - no weird smells either. The first turn on line I measure is 3.3 VDC solid. The other voltage is 2.93VDC with all the cables connected but 5VDC with the cable disconnected. Fuses are good.
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Another Vizio VW42LHDTV10A Inverter thread
Okay so I've been doing some reading on this set (VW42LHDTV10A).
I believe I have a bad master inverter. With the power plug pulled out of the inverter I have 3.3VDC, 5VDC and 24VDC/grounds to run the modules. With the power connector plugged into the inverter I have 3.3VDC and a dismal 2.9VDC (24VDC and ground are still good). Blue inverter LED comes on for a second or two and then goes out. TV never really turns on (no backlights). There's a repair kit on ShopJimmy.
[url]http://www.shopjimmy.com/lg-philips-6632l-0448a-6632l-0449a-master-slave-backlight-inverter-component-repair-kit.htm[/url]...Last edited by PotShotScott; 12-14-2017, 11:49 PM.
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