Question about JVC AV-48WP30 48" Rear Projection Television

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Getting more help

Hi tim,

Thanks for getting back to me
I'm not real familiar with a soldering iron, is there a chance i could damage the tv for good if i attempt this? If not i'm willing to give it a go.

Thanks,

hoag34@htomail.com

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You can easily cause major damage, if you are not expereienced with electronics or soldering at all i dont think i would try it. It is pretty simple but things can go wrong. A good repairman will run you $300-$500 which isnt really that bad when you compare it to $2000-$3000 for a good new set!
Let me know what you want to do!

Tim

Posted on Sep 24, 2008

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My flat screen tv turns off after 5 seconds of being on.


Good day!

Please try this simple and very easy solution on your problem.


You have a better chances if you have failing capacitors on the power supply.

Please try to open the back cover of your TV then look at the actual image of capacitors specially on the power supply board.
Please replaced it with the same type,ratings and value.Use soldering iron,soldering lead and soldering pump to replaced the bad capacitors..

I hope this solution will be helpful.Thanks for using fixya.

Jun 13, 2011 | Televison & Video

1 Answer

Elllo iv got a lg 50pc3d tv the tv blink 16 time wont open ive test my voltage and thats what it give to me original value 3.3v ---> 3.2V in real time original value 5v ----->...


Not sure if it is a power supply issue for sure, but I've had a similar issue on an older model LG LCD TV. My symptoms were: in the middle of watching TV the screen blinked a magenta color for a moment and then the screen went blank, the TV would seem to turn off and on but could not get the screen to show anything, my power light would also blink 13-16 times and was delayed when turning off. after researching this forum I found a fix. Mine was a problem with a damaged capacitor on the power board it was a Samxon 2200UF 20V capacitor that had a slight bulge on the top. If you remove the back panel of your TV and locate the Power Board (the circuit board that the power cord plugs into) check and see if any of the capacitors on this board have any bulges at all they may appear very slight but will be on the top. If you you find any with bulges they are most likely defective. Remove the circuit board and de-solder the damaged capacitors with a soldering iron from the bottom of the board, and replace with a 2200UF capacitor (or whatever UF value is associated with the damaged capacitor) with a higher voltage rating of 25V or higher that way they will run cooler. Be sure to note how the original capacitors were put in (which side the negative connects to) to avoid damaging the new capacitors. I was able to find the capactitors at a local electronic store, but you could also find them online. The capacitors are $2-4 dollars each and a soldering Iron is approximately $10 at a local radio shack. This fixed my TV, cost me $12 with a soldering Iron and took approximately 1 hour to repair. If you do not see any damaged capacitors then it may be another issue, but it is a simple process to check, Again I did not perform this on the same model TV, but it was a similar symptom and an LG. Good luck!

Mar 26, 2011 | Televison & Video

1 Answer

My samsung 50 inch plasma has thick black straight lines on the screen as well as red and green .please help


At least one solder connection on one of the matrix controllers has come unsoldered.
You can see here on a laptop LCD unit what I am referring to.
supertech_11_5.jpg

You need a really steady hand, a soldering iron, liquid solder flux, de-soldering braid (in case you make a solder bridge) and an illuminated magnifier or magnifying glass or microscope (to check for bridging) to re-solder these contacts down.
If you aren't familiar with doing surface mount soldering, I suggest you let a pro fix the TV.
Small problem here is that the matrix controller may be damaged, and once you get it re-soldered, the red and green strips may continue (unless they are also wide, in which case everything should be fixed up once it's all re-soldered.)

Feb 27, 2011 | Samsung PS50A410C1D 50 in. Plasma TV

1 Answer

Screen is getting smaller horizontally sometimes I only see a horizontal line


okay you will need a solder iron and solder the vertical chip needs to be solder again its what you call cold solder joints you just have to apply a few solder to the pins that control the horizointal output if you need help you can email me at fraser.christopher@yahoo.com any way you will have to take the tv apart expose the circuit board to where you can flip it over to see the solder under the vertical chip is always screwed to a heat sink it's a 12 to 14 pin that stand alone if you look real close you will see where the solder has crack if you never do this on your own i would be careful and also please unplug the tv from the wall if you never worked with electronics i hate to see you on the tv show 1000 way to die

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2 Answers

WHEN I TRY TO TURN MY TV ON,THE POWER LIGHT COMES ON BUT NO PICTURE & A LOUD BUZZING SOUND.


for first unplug the main power cord of the tv for couple of minutes and then reconnect it.also before reconnecting the power cord of the tv again remove all the external device wires connected at its back such as dvd player/vcr etc etc.just connect only tv wire and check out.if still the same problem then its quite possible that the capacitors and ic on the circuit board are getting short in between so the circuit is not getting completed and cutting in between so the tv power led comes but no picture comes up..in this case the circuit board needs to be checked with a multimeter.the faulty and burned out component part should be detected and then should be replaced with the help of soldering iron.to make it proper.to avoid further damage i suggest you that do not on the tv again and again as it will short some more tiny components and the reparing cost will increase as per that.at present its the normal circuit short problem in the tv get it repaired before using the tv again.
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also you can get new replaCEment power supply board.this clears the problem completely.
---------
you can get the required board and components at ----- www.partstore.com -------- or from ------ www.radioshack.com ----
---------
if you are not familiar with doing this you can get it done by local tv repair technician familiar with this model tv.
-----------
This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya.

Nov 20, 2009 | RCA Televison & Video

1 Answer

Wont turn on


if there is no power at all them main board is faulty.if no front led light is coming ON there is no power .so the main board is faulty.on the main board there is a fuse located you have to replace that and check first
tv turned off automatically
for first unplug the main power cord of the tv for couple of minutes and then reconnect it.also before reconnecting the power cord of the tv again remove all the external device wires connected at its back such as dvd player/vcr etc etc.just connect only tv wire and check out.if still the same problem then its quite possible that the capacitors and ic on the circuit board are getting short in between so the circuit is not getting completed and cutting in between so the tv power led comes but no picture comes up..in this case the circuit board needs to be checked with a multimeter.the faulty and burned out component part should be detected and then should be replaced with the help of soldering iron.to make it proper.to avoid further damage i suggest you that do not on the tv again and again as it will short some more tiny components and the reparing cost will increase as per that.at present its the normal circuit short problem in the tv get it repaired before using the tv again.
you can get the required board and components at ----- www.partstore.com -------- or from ------ www.radioshack.com ----
---------
if you are not familiar with doing this you can get it done by local tv repair technician familiar with this model tv.
-----------
This will help. Thanks please keep updated.please do rate the solution positively .thank you for using fixya.

Nov 11, 2009 | Televison & Video

1 Answer

My keyboard nc10 samsung is not typing anything at all. I am using a wireless keyboard at the moment. Help!!


if the key board is not typing at all then its internal key board circuit short.the circuit will have to be checked and re soldered.its bit costly and not easy job if not familiar with using multimeter and soldering iron.other wise it can be done manually if familiar with this tools. its common with many users about this keyboard circuit getting short internally

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1 Answer

When pushing the power button the tv turns right back off


Hi barbara70,

Based on your post/description, it would appear that your TV is developing a fault in the vertical section. Chances are that it is just a capacitor normally located pretty near the Vertical IC. Physically, it would be bigger than the other capacitors within the same area. It is relatively a simple and low cost repair job.

Should you venture a DIY, pls be reminded of safety precautions when working with electrical devices. Of course this would also require a bit of familiarity with electronic components and circuitry, possible use of a DVM and definitely a soldering iron. Access to a service manual or at least a schematic diagram with voltage measurements would make the diagnosis a lot easier but not a necessity. Should you be uncomfortable going this route, perhaps your best bet would then be to seek the services of a qualified TV professional or at least somebody familiar with soldering works.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Mar 25, 2008 | Televison & Video

1 Answer

Red & BLue Overlay And Wavy Picture


. they are located on a huge heat sink inside your set. Just look for the largest aluminum heat sink inside your set. You will notice them they are large black ICs with about 16 pins on them. Just unsolder the old ones and solder in the replacements. just be sure to put some heat sink compound on the back of the new ICs where they contact the heat sink. You can get a de-soldering iron at radio shack with a rubber bulb to make the de-soldering alot easier and you will also need a low wattage soldering Iron to solder in the new ones. Just mark any wires you remove to get the convergence module out. That way you will know where the wires plug in when your finished. It will need a convergence adjustment when your finihed. Be careful not to bridge any of the pins with excess solder. Inspect the pins with a magnifying glass when your finished to make sure the solder from any adjacent pins arent touching each other. If you need to know where to buy replacement ICs let me know.

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1 Answer

TV turnes its self off


Sounds like you have a bad solder connection. Since you had the back off can you slide the chassis out not forcing anything and may have to unplug a couple of plugs to get it out and turn the chassis upside down carefully and with a magnifying glass look for bad connections in the solder If you see obvious bad connections they can be soldered with rosin core solder and soldering iron used in electronics. Put the hot iron on the bad connection first to heat it up and then apply solder letting it flow over the connection. let cool and solidify. Hope this helps

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