How to replace bad puffy caps on Samsung power supply review Samsung TV
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This video is designed to be a guide for testing and troubleshooting your TV repair. Please note that other complications may exist that aren't addressed in this guide. While we always strive to provide accurate and detailed information, we can't guarantee that it will fix your TV's issues.
Step 1: Identify Bad/bulging caps.
Step 2: Discharge Power Supply
Step 3: Desolder bad caps.
Step 4: Search www.shopjimmy.com for replacement caps.
Step 5: Solder in new caps.
Step 6: Clean the surface by the new caps.
Step 7: Test board in TV to be sure it is working.
So in this video today we are going to identify some bad caps and replace them on this Samsung Power Supply. So when we are going to replace components on a power supply you need to make sure the power supply is discharged first. Some power supplys will just do it naturally and they will just discharge pretty quickly, others will not. But this cap right here holds about 450 volts, its anywhere between 350 and 400 Um if you happen to touch both sides, both terminals inside the board at the same
time you will get a shock, its usually not going to cause any permanent damage, but it can burn and it will certainly hurt and you will prob drop the board. In order to make sure it is discharged, there is a few different ways we can do it. First we can unplug the TV and leave it for 24, but when you want to work on a TV you are using that is sometimes not quite so easy. The next option depending on the board you can use your multimeter and check the voltage on it and it may have resistors in peril to discharge, if it does that and it reads below 50 volts you are good to go work on the board. The other way to do it is using a resistor, one of the higher wattage resistors and touching it to both terminals on the other side and that will help to discharge it slowly. Don't take a screwdriver and put it across both terminals as you will get a direct short and you can solder your screwdriver into both terminals and possibly cause damage to other components on the board. So on this power supply we have identified some bad caps, so here is a here are some good caps here, they have nice flat tops, no leaking nothing is wrong with them and right next to them we have these caps right here and you can see that there tops are bulged up and they are also leaking out this kind of brown ooze which means they are defective. Every once in awhile you will get caps that are defective but do not show signs like that but almost every time you are going to see this puffiness and you are going to see if it is really bad, fluid leaking out of them. So bad caps can manifest in a number of ways, you might find the TV will not power up or more commonly it is going to take multiple attempts for the TV to power up. Once it is on, it is going to work fine, but again when you turn it off, you will have to try multiple Times to turn it back on. Over time this tends to get worse as the cap start to degrade even more. And it will take more and more attempts to get the TV to turn on. Once in awhile if the cap tends to be in a different place you can get noise in the picture but usually it is the issue with the TV starting up that is the problem. So we have gone ahead and flipped the board over if you are having trouble trying to find the cap you are trying to replace sometimes if you just put your finger on the other side and just pinch it kind of shows you the location otherwise it can be kind of hard to locate them on the back. Now we know where our caps are, we are going to go ahead and use our Hakko 808 desolder gun and just heat up the joints let it melt suck it up and the same on the other side and as you can see the cap actually dropped right out of the board so you know it is removed. And we can go ahead and do the second one, same thing heat it up, vacuum it out and the other side. And there you go they both dropped out, now the joints are clean and now we can go ahead put in our replacement caps. So here we have the original cap that we removed from the board, and this is a 10 volt 2200 microfer and 105 degree cap and it is really important that when we get a replacement cap that we choose the same values.
TV Repair Made Easy™
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18 июн 2013
