This TV would not come out of standby. I replaced shorted diode D607 on the power supply board and the set worked fine for a few days then quit again with the D607 shorted again. All the caps on were Sam Young and they looked fine to the eye. But I decided to replace them all since that brand is on the "Bad Caps" list. That did the trick and the set has been working fine for several weeks.
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Re: LG 47LM4600-UC 47 inch LCD TV With Sam Young Caps in Power Supply
Good repair job.
Electrolytic capacitors can fail without any external signs.My first choice in quality Japanese electrolytics is Nippon Chemi-Con, which has been in business since 1931... the quality of electronics is dependent on the quality of the electrolytics. -
Re: LG 47LM4600-UC 47 inch LCD TV With Sam Young Caps in Power Supply
I just fixed one of these. Had standby light and 164v across main cap. I tested diode D607 and it read short in circuit. Pulled a leg up and it was good. 1 inch away from it I saw the remains of a small blue cap. There was another one very close by, a 101k.
I pulled one off a junk board and transplanted it. A working tv!Comment
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Re: LG 47LM4600-UC 47 inch LCD TV With Sam Young Caps in Power Supply
First of all thanks to the guys that posted about this issue with this TV, it really simplified determining what the problem is. And just to add some failure background, I was watching this when a fairly loud pop occurred and the TV went black with no sound.
That said, I am hoping for some help identifying the value of the capacitor. It does not have any numbers on it and I have been unsuccessful in locating a parts list for the Lg 47LM4600. The part can be seen in first photo (C603) and has a black burnt mark in the middle of it. D607 read shorted as previously mentioned but OK when one lead lifted.
Thanks in advance for any inputAttached FilesLast edited by RDC55; 08-07-2019, 02:33 PM.Comment
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Re: LG 47LM4600-UC 47 inch LCD TV With Sam Young Caps in Power Supply
C603 is a 220pF 1KV you can upgrade it to a 2KV.Comment
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Re: LG 47LM4600-UC 47 inch LCD TV With Sam Young Caps in Power Supply
Thanks diif - parts ordered and received from Digi-Key. I took your advice and upgraded to the 2 KV capacitor. I also went ahead and replaced D607 (MUR460) since it displayed some blackening on the one lead - it was likely fine but too cheap to take the risk. I will run it for a while and no news is good news.
Just to add C610 main cap 160V standby and 395 operating.Last edited by RDC55; 08-10-2019, 12:46 PM.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.
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Hello,
First, I am a complete noob with high voltage stuff. I'm learning, but I need help by someone looking over my shoulder.
I recently came into posession of a Heathkit IO-4205 5MHz Dual Trace Oscilloscope. The documentation is copyright 1978. I'm told it works.
I opened it up to check the caps before I applied power, and found the following black caps and wanted to know what they were. They are on the power supply board. I was able to read the name and model and came up with, "Nytronics 162J-1, 0.1uF, 20% tolerance, 2000VDC."
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I'm trying to repair two old VCRs, they both have bad caps. One has leaky ones, the other would barely run until I subbed in some caps from another power supply I had laying around (though they are the wrong values). This vcr works for an hour or two, but then the power supply starts whining and the picture gets lines in it. I didn't replace all the secondary caps, so another voltage might still be problematic, or the values I used are too far off.
I've been on mouser and digikey but the options are a bit overwhelming. I just need some new ones that will work. They don't need to be top quality,... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time...
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