Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

[cadillacman]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

**fixed my typos**

im sure i found mine the wrong way lol, but disconnect all the lamp wires from the inverter. On the board side, ohm between the 2 pins of each inverter connector. You should read like 4 megaohms or something like that with your dmm. If any read open, you likely have an issue with that inverter.

Likewise another method would be to plug in one lamp connection at a time, then attempt to power on. If you get one set of lamps that does not "flash on then off" when the tv powers on and back off, this is likely the inverter you are having issues with.

Don't forget to check it over for bad caps, bad solder, test for proper voltages while it is apart. My inverter board had a bunch of krappy solder on it.

[testas86]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

Ok so i took the board out and i took some pictures (attached)

one is the pic of my voltmeter and my setting (to make sure im doing it right)

second is the pic of my transformer and where im putting the black and red needles

everything reads 1

so i assume im doing something wrong here. i also tried it from underneath the board and got the same thing

[testas86]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

so i think my voltmeter is messing up i replaced the fuse in it and the battery and all i get is flashes of numbers and when i hold the two probes together it flashes -1 to .800 over and over on 2k ohms

[testas86]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

following with email notifications

[testas86]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

so since i cant get a good reading with my multi meter i decided to do what someone posted before with unplugging each inverter cept one and seeing what happens. so all of them light something up for a second then power off cept for one. im assuming thats the bad one. is this a good guess. also im in the market for a new multimeter( i posted in the testing equipment forum for help finding a good multi meter) any thoughts on my inverter test or a multi meter to look in to please let me know! thanks!

[cadillacman]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

putting the leads where you marked wont do any good.

Put the leads directly at the connector pins or each lamp( unplug a lamp, put the meter leads where the connector used to go on the two metal pins)

Yes thst meter isnt so good for a newbie. You want a more modern auto ranging meter.

by process of elimination, looks like you found it that way. Now you know which one is most likely giving you problems.

I seill need to buy an inverter for mine, i have been waiting untill payday lol

[PlainBill]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

so since i cant get a good reading with my multi meter i decided to do what someone posted before with unplugging each inverter cept one and seeing what happens. so all of them light something up for a second then power off cept for one. im assuming thats the bad one. is this a good guess. also im in the market for a new multimeter( i posted in the testing equipment forum for help finding a good multi meter) any thoughts on my inverter test or a multi meter to look in to please let me know! thanks!

Your test is incomplete. You have learned that one transformer / wiring / CCFL combination does not work. As of yet, you don't know if it is the CCFL / wiring or the transformer. To determine that, let's say the transformer / CCFL in position 3 does not work. Connect the CCFL from position 3 to the transformer connector in position 4 and repeat the test. If it lights, the CCFL in position 3 is probably good. To confirm, connect the CCFL in position 4 to the transformer connector in position 3. If that also does not light, the problem is associated with the transformer (and associated circuitry) in position 3. By measuring the resistances of the secondaries of each transformer you can determine if the transformer is open or shorted.

PlainBill

[testas86]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

ok bill thanks for the help i will try that out. As far as the testing of resistance i think im doing it wrong or my multimeter is messed up. Im a noob when it comes to testing these things, i posted a pic of where i was sticking the probes im assuming thats the wrong place. would you mind circling it on a posted pic so i know im doing it right?

[PlainBill]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

ok bill thanks for the help i will try that out. As far as the testing of resistance i think im doing it wrong or my multimeter is messed up. Im a noob when it comes to testing these things, i posted a pic of where i was sticking the probes im assuming thats the wrong place. would you mind circling it on a posted pic so i know im doing it right?

Those are the correct points, although you may have better luck on the bottom side of the board. Caddilacman reported 4 megohms resistance on the good transformers, so make sure you start with the highest resistance range.

PlainBill

[testas86]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

ok ill give that a try also i donno if my multi meter can handle that it only goes up to 2m on resistance testing

[testas86]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

ok so i tried it again with my multi meter and just get the 1. i also swapped around the ccfl and the cable that didnt light up before lit up when plugged in to a different transformer and the one that lit up before didnt when plugged in to the suspected bad one. so at this point im going to order that one transformer and replace it.

[cadillacman]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

good point making sure the ccfls work on another inverter bill, you saved my rear on that one..

testas: per your pm i believe this is the transformer you need

http://cgi.ebay.com/Element-TV-Inver...271#vi-content

However PLEASE post all the numbers off of your old transformer so #1 we can verify what is a correct replacement part and #2 so in the future other people have a reference as to what was originally found in these sets.

[testas86]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

ok the numbers are 3pc0xb001 js hvt-1270749

[PlainBill]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

ok the numbers are 3pc0xb001 js hvt-1270749

eBay auction from one of our members.

PlainBill

[kc8adu]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

measure at the transformer.there often is a cap in series with the lamp.i would expect no more than a few k ohms.

[cadillacman]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

if you measure at the two secondary terminals on each side of the secondary side yes sir, but from pin to pin at the lamp connector it reads like 4 meg ohms, weired, i know.

I just bought one. severach, when you see a payment from jerianne, thats my wife(+me lol)

[cadillacman]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

Wanted to follow this up. THe suspect inverter transformer was replaced with a cross-referenced piece from our own member serverach(bought through ebay)

I should warn you guys the traces to these transformers are extremely easy to damage. I had to do a little trace work when it came time to install the new one due to two of them lifting on me during removal of the old piece. ( i used a solder sucker, looks like good desoldering braid is the only safe way to remove solder on these.)

The replacement
( http://cgi.ebay.com/Element-TV-Inver...item3cb9791e0f)

fits in perfectly and functions beautifully. THANK YOU for taking the time to cross reference those transformers, then offer them to the general public at a fair price. YOU ARE THE MAN. You might want to add this model to your known list of sets that use this inverter.

Heres some victory pics. Sorry for the krappy pic, im running it on composite at the moment, dont feel like going upstairs to rob the hdmi cord from my tv.

thanks again to everybody for your input on my posts. I really do appreciate it guys.

[testas86]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

i use a desoldering iron i bought from radio shack and it works perfectly. i removed the transformer in about 30 seconds and no damage to anything. installed the new one i got from Ebay and boom working tv. thanks guys for all the help.

[cadillacman]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

sweet!!!!! congrats on the fix. I have a feeling this is a pretty common failure with that particular board.

yeah im already back on the hunt for another set... mabye i will get lucky and pickup new victim this weekend.

[testas86]

Re: Emerson 32" lcd, LC320EM82 S power issues(sony bravia??)

thanks! yeah ive been picking up tvs from our electronic recycling guys (i do computer repair).