In this video we repair the power supply in a philips 23PF5320 LCD TV. Visit www.preher-tech.com for more repair information. Email john@preher-tech.com anytime with electronics related questions.
Fixing a 50 inch Samsung Plasma TV. TV went dead after last weekend NFL playoff games. With power disconnected, a continuity check revealed the main ceramic cartridge fuse had failed. Local supply dictated adaptation of alternative part. This is not the switching power supply problem. I had that too, about a year ago. That is the problem where the TV just cycles on and off. The fix for that problem is replacing electrolytic capacitors on the power supply board, or replacing the whole board itself.
6:51 pm on March 23rd, 2011
Cool site. I won’t be fixing tv’s but i did understood what you were saying and enjoyed following your instructions. This will be helpful for many!!! I couldn’t wait to see part 2!!! Great job!!!
7:45 pm on March 23rd, 2011
Nice video John, well prepared, well organized, thanks for helping me feel more confident in doing one of these repairs myself.
7:47 pm on March 23rd, 2011
John, awesome video of instruction. Followed exactly. Plugged in the tv and boom! now watching tv. Two 99 cent capacitors from a local tv repair shop. Monkey see monkey do…I did. Fantastic. Keep up the great videos.
8:28 pm on March 23rd, 2011
Hello,
Is that a 100 K ohm 2W resistor you used to discharge the condenser ?
Thank you .
8:52 pm on March 23rd, 2011
@hoopfan71 you will like the ESR Micro v4.0, I love mine. I have not used one of the bulb type solder suckers, but thanks for the info. Have a good one. If you ever any electronics repair help email me john@preher-tech(put dot here)com
9:28 pm on March 23rd, 2011
@hoopfan71 you will like the ESR Micro v4.0, I love mine. I have not used one of the bulb type solder suckers, but thanks for the info. Have a good one. If you ever any electronics repair help email me john@preher-tech(put dot here)com
10:12 pm on March 23rd, 2011
@hoopfan71 GLad to help and congrats on the new TV : ) …
10:29 pm on March 23rd, 2011
@hoopfan71 I bought your e-book on LCD tv repair and used my multimeter to test the capacitors on the power supply board using the resistance setting. Three of the caps did not go to infinity, so I removed them from the board and retested them. When I did the retest, they all went to infinity. I just replaced all three caps, powered the tv on, and I was shocked (not literally) that it actually worked! Thanks for your great info. I now have a working 42″ LCD w/ 1080p for which I only paid $150.
11:17 pm on March 23rd, 2011
Hi John. I have a JVC LCD tv (lt-42×688) that I got very cheaply, and it has no picture or sound, but the “power” light is on. I just ordered the ESR Micro v4.0 meter, since there were no capacitors with obvious issues when I visually inspected the boards. Your thoughts…
BTW, I’m not sure if you’ve used one of these, but the desoldering iron with the bulb attached that Rad Shack sells works surprisingly well for removing solder.
Go Seahawks
11:46 pm on March 23rd, 2011
LCD TV doc
12:29 am on March 24th, 2011
Thanks John, …really enjoyed the video very much. You show what a competent and confident electronics tech is all about! Very good quality filming and audio as well! Thanks again, -Robert
12:37 am on March 24th, 2011
The “what r u doin” dog is scary!! Lol
12:38 am on March 24th, 2011
NG9D, sorry for your losses but at least there was something you could do about one of them. Excellent video. I have one of these televisions that I bought in 2008 so this video may prove beneficial if the situation arises. As far as football, better luck next year. =D
12:49 am on March 24th, 2011
FelixTHF, the first time my Samsung PLASMA failed it was the on-off-on power problem. TV was 13 months old but Samsung agreed to fix it because it was a generic defect. They replaced the PS board. PLASMA TVs are energy hogs (mine draws over half kilowatt of power), they run hot and are prone to failure. Also PLASMA TV sets produce broad spectrum RFI (Radio Frequency Interference) to communications. I am saddened that the FCC ignorantly allowed PLASMA TV sets to be sold in the USA. 73 de NG9D
12:50 am on March 24th, 2011
Interesting. Inside this set looks nearly identical to a broken LG plasma that I just got. Probably says something about what brands mean, or rather DON’T mean today! The only difference I can tell right now is that the y sustain board is slightly different.
Mine suddenly shuts off. Don’t see any bulged caps but do see some suspected cheap brand caps. Can you tell me which caps fixed yours last time? Where they noticeably bulged?
1:34 am on March 24th, 2011
“…what really blew the fuse?” Localmode, I am not sure. Narrowed it down to three broad causes: 1) external power surge (unlikely for a time lag fuse), 2) malfunction of the power supply, or possibly 3) the ceramic fuse had some kind of age related failure. If you have any ideas, let me know. PS- I reloaded video so I could make the warning more clear that all tests are done with no power applied. And there should never be a power connection with the cover off. 73 de Lynn, NG9D