Question about Vizio L32 32 in. LCD HDTV

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No power the power board has a burnt diode or whatever it is. nedd to find a used or new power board reasonable

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If you have isolated the problem to the power board, then you can look on the 'net for a board. One place to look is eBay. You will need your TV model number and the part number of the power supply board. Look at;
http://stores.shop.ebay.com/interliquid__W0QQ_sasiZ1
http://www.shopjimmy.com/
There are other places you can look at too.

Posted on Mar 10, 2009

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Posted on Jan 02, 2017

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I need a power supply board # 080GL19X01LT


Have a look here. Hover your mouse over the area of the PCB to zoom in on the component you're trying to identify. I saw the C604 labeled as:
"B. 102K 1KV" I couldn't see the other part you're look for though.

Check out this replacement PCB for $88. It isn't available for shipping until March though.

Good luck!

Feb 05, 2013 | Vizio E420VT 42 Class Razor LED HDTV

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Shorted Rectifier Diode (fuse keeps blowing)


jdvillanueva_14.jpg
This CRT tv is dead set, no reaction when the power button is pressed(no standby led light). I've open the back panel and check the faulty parts.
jdvillanueva_15.jpg

As you can see the fuse was badly burnt-out indication of excessive current due to short circuit.
jdvillanueva_17.jpg

I've checked the parts feeding the AC line to the power supply board (Power cord, VDR, Ceramic capacitor, Coil, Posistor, Degaussing coil) one by one and I've found out that one of the four rectifier diode has a leak which caused the glass fuse burnt-out.
Here's how to test the rectifier diode.

Good Diode
Note : Forward and reverse bias depend on what type of ohmmeter are you using, here I'm using a Japan Standard(Sanwa Brand).
jdvillanueva_21.jpg

Using an ohmmeter set it to X10 to see much easier the leak from the diode in reverse bias.

Forward Bias : test the diode by connecting the red test prod of the tester to anode and then the black test prod to cathode of diode. You will see the pointer will reads a faily low resistance(above picture).
jdvillanueva_22.jpg

Reverse Bias : test the diode by connecting the red test prod of the tester to cathode and then the black test prod to anode of diode. You will see at the picture(above) that the pointer didn't react (remains in infinity). This is a good diode.


Bad(leaky) Diode
jdvillanueva_23.jpg

Forward Bias will reads fairly low resistance.
jdvillanueva_24.jpg

Reverse bias unlike the good diode the pointer will also reads a fairly low resistance.

After confirming that the diode caused the fuse from blowing I've decided to replaced all four diodes since I have a lots in my stocks.
jdvillanueva_25.jpg

Remember that when you installing the new diode on the board, make sure that you will make it in the right polarity.

jdvillanueva_26.jpg

This steps is also applicable in the DVD Player,Flat panel, Projection, LCD TV, you have to disregard only the posistor and degaussing coil.

Have a nice day!
Thanks for using Fixya.

Jdvillanueva

on Mar 02, 2011 | Televison & Video

1 Answer

Asus g51v dead


it is dead sorry to say theres more than you can see. use a mag glass to see all board look for water trales burnt marks all before you try to fix it ok jim

Dec 03, 2011 | ASUS Computers & Internet

1 Answer

MCS 95 SUBWOOFER WON'T POWER ON..REPLACED FUSE WHAT ELSE TO TRY


Concerning the Boston Suwoofer not powering up, I just had the same problem and this is what I did to fix it.

1. Uplug the unit
2. Remove the outer screws and remove the board unit
3. Unplug the board (Power Board) that is connected to the switch and unplug the two connectors that connect to the amp.
4. Remove the 4 screws(on the front panel side not the nuts on the board)
5. Look at the switching diode (labeled #1) directly beside the transistor cooling plate, if the board around this transistor is burnt there is a good chance that the diode is fried. If you do not trust your eye you can measure across the positive and negitave of the diode with your multi-meter (on the diode check setting) and you should read ~.565 and you should read infinity if you swap the leads. If the diode reads ~.667 and you can read this taken across any polarity the switching diode is fried.
6. If the diode is fried go to radio shack
7. Purchase a 1N914-1N4148 Switching Diode. Cost about $1.36.
8. Go home de-solder the fried diode.
9. Solder in the new Diode. ***Pay ATTENTION to put the new diode in the exact way the old one came out!!*** If you do not get the polarity correct the diode will not work properly and your unit will not power up. Also, it is a good idea to leave ~ 1/8" between the diode and the board, this will help disipate heat the cause of the problem to begin with.
10. Place power Board back on the backside of the front panel
11. Install 4 screws(on the front panel side not the nuts on the board)
12. Plug the board (Power Board) that is connected to the switch and plug the two connectors that connect to the amp.
13. Place the panel back onto the subwoofer and secure it with the screws. You can use a screw gun for this just make sure to turn you tourqe level back to ~3 otherwise you could strip out the screw and or the particle board.
14. Plug it in and your rolling.

I hope I am not to late and this works out for you. I just fixed mine tonight.

Nov 01, 2011 | Audio Players & Recorders

1 Answer

I have a cobra CB. I went to hook it up today, and the fuse popped. I went to unhook it and noticed that the radio was smoking. I took the cover off to take a look and see if everything was OK. There is...


Most CB radio have a diode near the B+ leads going in the circuit board, by your description when you hooked it up you probably got the + and - mixed up and put them in reverse by mistake, when this happens it will short out the diode and sometimes destroy the audio output ic and open a trace on the circuit board before it blows the fuse as it smokes. The diode must be replaced and burnt spot repaired on the circuit board, if you are very lucky the audio ic will come out unharmed.

Mar 02, 2011 | Cobra 19 DX IV CB Radio

2 Answers

I have a trc447cb radio, it kept blowing fuses, please help thanks...


This radio has been hooked up backwards. CB radios cannot be hooked up backwards or it will destroy it. However this is hope.

Because they can be damaged this way, there are polarity protection diodes in the radio that will blow if the radio is hooked up backwards, before it can hurt anything in the radio.

They are usually N1004 diodes. Is a big black diode that has a white stripe. And if it is blown, it will most likely be Black and burnt.

Open the radio, and look near the power section of the radio. It will be in the back near where the power cord plugs into it.

Look for a burnt black diode. That is the protection diode.

Get an N1004 or better from radio shack, and remove the burnt one, and put the new one in, making sure to put it in with the white strip on the same side as the original.

Once you have finished. Make sure the polarity is correct. Then hook up the radio, and turn it on. Should work fine.

If you want to validate that it is the correct diode, if you pull on leg out of the board, and turn on the radio, it will turn on. When the diode blows, it prevent the power from getting to the board, if you take it out, it will let it through. CAUTION. The radio will work again if you just remove the burn diode without replacing it. But if you hook it backwards again, it will be toast, and as good a door stop.

Sep 05, 2010 | Radio Shack TRC-447 CB Radio

1 Answer

Wii system will not turn on ,do have to system


hello,
A very common failure, which seems to crop up on some of the earlier Nintendo Wii models, is where the power supply fails for whatever reason. When switched on there is no life and often, the internal fuses (or sometimes the fuse in the power lead) blow.
Very often, the fault lies with a very simple component on the power board. The usual component is a diode, of which there are four similar ones. Often though, the same diode fails each time.
Be very careful when working on the power board as it contains dangerously high voltages even when not connected to the mains. This is because capacitors can remain charged for some number of hours or days. Take all normal precautions before working in this area. In addition, handle the board as little as possible
Check the diodes with a continuity meter. If it shorts then it has blown and should be replaced with a 1 Amp diode. You should also test the two board fuses for continuity as one (or both) of these can be blown by the over current. You may also have to replace the main fuse in the power lead as this can go at the same time.
Hope this help....

May 26, 2010 | Nintendo Wii Console

1 Answer

No power


hi there,
A very common failure, which seems to crop up on some of the earlier Nintendo Wii models, is where the power supply fails for whatever reason. When switched on there is no life and often, the internal fuses (or sometimes the fuse in the power lead) blow.
Very often, the fault lies with a very simple component on the power board. The usual component is a diode, of which there are four similar ones. Often though, the same diode fails each time. This is the third of the largish diodes.
Be very careful when working on the power board as it contains dangerously high voltages even when not connected to the mains. This is because capacitors can remain charged for some number of hours or days. Take all normal precautions before working in this area. In addition, handle the board as little as possible
Check the diodes with a continuity meter. If it shorts then it has blown and should be replaced with a 1 Amp diode. You should also test the two board fuses for continuity as one (or both) of these can be blown by the over current. You may also have to replace the main fuse in the power lead as this can go at the same time.
Hope this will help....

May 24, 2010 | Nintendo Wii Console

2 Answers

Does it have a fuse we got hit by lighting and now the Pc wont power up


To fix the problem, you need to disassemble the power supply, replace the burnt out fuse, & also check the bridge rectifier section for burnt out rectifying diodes (these usually get burnt out if the high current gets the chance to leak past the fuse, which could sometimes happen). If you find burnt out rectifying diodes, you will need to replace them as well, as they could burn out the fuse again when you try to use the power supply while they are still there.

Dec 20, 2009 | Codegen : 350W ATX Power Supply With 12cm...

1 Answer

Radioshack TRC-503 CB radio


First, use an ohm meter and test the power wires for continuity. If they test good then there is a protection diode on the board that is probably blown. If I remember right it is a 1N4001 diode. Generally you can see if its blown as it will either be burnt or look like its cracked. If it is you will need to replace that diode to restore power.

Aug 06, 2009 | Radio Shack TRC-503 CB Radio

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