Some More Plasma TV Repairs

[dlove9998]

I got a lg plasma. Its making the clicking sound, and the power light comes on and goes off. I open it up checked ALL the capicitors, and they all look good.... can you please tell me what else could it be?????

[bfriesen75]

What's the status of that Vizio you show briefly at the end, did you ever get a chance to work on it? I recently got a broken Vizio plasma that looks just like the one in your video, so I'd be curious to hear what you found wrong.

[Maxxarcade]

@bfriesen75 You can see the Vizio working in my Atari 2600 video. It just needed some power supply repairs.

[agentmattk]

Hey mate, first of all, thank you for your helpful videos. May i ask your expertise on a problem i have;

I have a Panasonic Viera 42" TH-42PV8AZ that i am working on. It has an intermittent black line problem affecting 2 of the driver boards both are in sync when faulting... I have followed black line fix guides except the ribbon cables in this one have no component underneath to resolder, aluminium heatsink is glued on.

Could you shed any light where they might be in this TV? Thank you

[linagee]

Time to get a hot air gun. Ack. I just cringe at you saying you did all the soldering and desoldering without one.

[deathdime]

@linagee Ya, it was a pain. Got them working though.

[Maxxarcade]

@deathdime Darn it, I hate when people forget to log out of my shop PC. I just replied to a bunch of comments with my Sister's Fiance's account.

[GrantsPassTVRepairs]

Sometimes I find it easier to cut capacitor in half from the top of the PC board and to solder my new capacitor on to the remaining leads than to unsolder the old ones from a double sided circuit board. After I cut the cap in half the remaining portion can be slid right off the board and all you still have plenty of wire to solder the new on on to.

[Maxxarcade]

@GrantsPassTVRepairs I've debated doing that a couple times, but I ended up using those cheap SMD desoldering tweezers to remove the caps. I must have been crazy to replace so many caps just to fix these, but at least I got some SMD practice in!

I think these were the worst sets I've worked on as far as bad caps go. They have hundreds of caps, and cheap ones at that. Most people would just toss them and buy a new TV, but I hate wasting stuff :-)

[GrantsPassTVRepairs]

@Maxxarcade John Preher said he has noticed many of the surface mounted caps he replaced didn't

seem to last so he now tries to use standard radial caps when possible. I have often noticed by adding my own solder to the circuit board connections I'm attempting to desolder it wicks up much better. It mixes with the high temperature solder to lower it's melting point. I suspect you figured this out already...

[Maxxarcade]

@GrantsPassTVRepairs Ya, I hate lead free solder. Sure, there's less lead in landfills now, but tons more plastic and other substances from discarded electronics. I've seen so may things fail because of bad solder, especially on BGA chips. There's a reason medical equipment is exempt :-)

I also use a flux pen when working with small parts. Helps the new solder to flow when used in tiny amounts that aren't enough for the built-in flux to work.

[GrantsPassTVRepairs]

@Maxxarcade Here is a video on BGA you might like. watch?v=JB1InDsWCjQ&feature=fv­w

I have a small hot air gun which is probably designed for warming heat shrink tubing but it gets hot enough to solder with.

[thresenuff]

@maxarcade I have an LG 50pc3d plasma tv and when i tried turning it on, it clicked and went completely dead. I don't have any on or off lights at all and it wont even make any clicking sound when i try turning it on. Should i try changing the power supply capacitors or could it be something else?

[4rmaan]

how difficult is it to replace a smashed plasma screen, is it similar to replacing an lcd screen or is their a stark difference?

[Maxxarcade]

@4rmaan Whenever a plasma screen gets broken, I consider it a parts set. The screens are just too big and heavy to ship, if you can even find them. LCD's are sometimes worth fixing if they are smaller.

If you can find an identical set locally that has a good screen and bad boards, you could put your boards in that one.

[4rmaan]

@Maxxarcade is that a tricky process or is it pretty straight forward

[4rmaan]

@Maxxarcade is it tricky or is it a straight forward process

[Maxxarcade]

@4rmaan You mean swapping boards between sets? Depends on the TV. Some are hard to get apart, such as the last Vizio I worked on.

Another thing that might be needed is power supply adjustments. Each screen requires slightly different voltages, however if both sets were made around the same time, the screens might be rated equally.

[xsplittx740]

@Maxxarcade i just got a philips plasma 42pfl5432d/37 and it was through a power surge during a storm... i check the fuse and it was good, all the capasitors look fine. it just stays on standby... the lights dont blink or anything, it just stays red and when you hit the power button there is no change.. no clicking sound or anything.. ive repaired a lot of these tv's and have not had the same reaction.. and i dont want to charge someone for replacing the power supply board when im not sure

[4rmaan]

@Maxxarcade is it a tricky process or pretty straight forward?

[Aussie50]

Good to see your getting your skills up!, I wish i had your tools :D

I took my JVC SMPSU out this arvo since sombody suggested it is the source of my overheat error. I'll try and work out what caps are bad on it, seems like its a common thing on these old ones.

[Maxxarcade]

@Aussie50 Could very well be the caps, but it's hard to say. Did you check any voltages before you removed it?

Use caution when working on plasma TV's, as they have high voltages at very high current. Not a good combination if you touch the wrong stuff :-)

[stingraycollector16]

i see you have a couple kirbys what type of kirby does that box go with thats sitting next to that plasma with the espn logo burnt into it

[Maxxarcade]

That's the accessories to my Kirby Classic III.

[stingraycollector16]

@Maxxarcade oh i was just wondering because the box for my classic 3 is brown with dark brown writing is your a 76

[PhattyMo]

What model is that Vizio? I have a working one here with a broken screen,if you need parts/boards.(and if it's the same model)

[Maxxarcade]

I think it's a VP-422, I'll have to check this weekend and see.

[PhattyMo]

@Maxxarcade

Ahh,okay. The one I have is a 32",not a 42" like I thought..

[AllAmericanFiveRadio]

Nice work, those TV are very interesting, thanks for the Digital TV tour.

[aleeeeaaa]

Nice vidio. What kind of ESR tester do you use?

[Maxxarcade]

Capanalyzer 88A by Electronic Design Specialists.

[wildbilltexas]

Wow I didn't think plasma or LCD screens could get burned in.

[Maxxarcade]

Plasma can, as it uses phosphor just like a CRT. LCD cannot get screen burn.

[HDXFH]

bad caps, that pisses me off

[JeffN727]

Where did you get all these? Even though these TV's are well used, they still seem too new to be blowing caps.

I'll stick with my 10 year old Zenith 27" CRT model, that still works just as good as it did when new. Not interested in HDTV, but I have found that an HD signal looks incredible on a regular set.

[Trance88]

Wow. They really need to improve those capacitors. These TV's are less than 10 years old and are having capacitor problems? This is just one reason I'm not going to be buying a flat pannel TV any time soon. Thats pretty neat you can fix these TV's though.

[umajunkcollector]

I'm stickin with CRT TVs!

I may consider getting a projection set too.

[Maxxarcade]

CRT's are fine as long as you are not looking for HDTV.  Vintage TV's with new caps can last decades.

[spatsbear2]

lol at the burn-in.......

SPORTS! :-p

[Maxxarcade]

Hehe ya, I'll have to burn some video games or cartoons into it to cover it up :-)

From what I've seen, all of these TV's have ESPN burn to varying degrees. The screens still outlasted the caps though...

[linuxlove4004]

So when something breaks, do people rush to you to give their broken stuff to you, where you fix it and get lots of good stuff for (almost) free?

[Maxxarcade]

I work in the amusement/arcade field, and there is lots of broken stuff that would normally get tossed that people give me to fix.  It's just a hobby for me, so I'm mainly fixing stuff for friends and family. Once in a while I sell stuff on Ebay.

[cristoretornebiblia]

What do you do specifically in the amusement/arcade field?

[Maxxarcade]

I fix the equipment (video games, jukeboxes, pinball machines etc).

[AnalogueJosh]

I always thought that those surface mount caps were supposed to last longer - or is that just solid state caps?

LOL @ the logo burned in, I guess the customer won't notice as long as you demo it on the ESPN channel! ;).

[Maxxarcade]

You are thinking of Solid Caps. They look similar to SMT electrolytics.

These SMT electrolytics fail quite often, probably partly due to their small size.

[CoolDudeClem]

What is it with capacitors wearing out so quickly in electronics these days? I could expect that from older things from the 70's and earlier, but then that's todays chinese build quality for you.

[Orcinus24x5]

@CoolDudeClem It's a direct result of industrial espionage. Chinese spies stole an incomplete electrolyte formula from Japan, which was missing the stabilizer. Billions of capacitors were made with the incomplete electrolyte, and have incredibly high failure rates, especially in hot environments, or when the caps are used in a high frequency switching power supply which puts a lot of strain on the caps. Remember all those motherboard with blown caps? yeah... cheap chinese garbage indeed. >:|

[poopooGarret]

nice

[desertman123]

That's a nice pile of caps you have on your bench.

[Maxxarcade]

Haha ya, I was getting kinda tired of changing caps after a while. Gets pretty tiring when there are that many bad ones at one time.