Element ELGFT401

[budm]

Re: Element ELGFT401

You may want to consider new board ($40), I am not sure if you have all the tools needed to do component level troubleshooting and replacing.

[newtothis2]

Re: Element ELGFT401

I have soldered board's before. What part's am I looking to replace.

[budm]

Re: Element ELGFT401

We need to check the DC voltages right at the two legs of those two start up caps in red circle in that 5VSB section, you must be real careful because you are working in the primary deadly side of the circuits so do not touch any thing with your hands or body.
After that we may have to check the capacitance and the ESR of those two caps or just replaced them since they will need to be replaced sooner or later any away, actually the set of caps should be replaced.
You should get the digital meter before going further, but I will wait and see what you can read with your meter.

[newtothis2]

Re: Element ELGFT401

OK, Im assuming I pull he board and place on none metallic surface and ground the screw hole closest to the ac. leaving the low voltage wires disconnected. And test ec3, c21 from the back side?.

[budm]

Re: Element ELGFT401

The power supply board can be tested by itself without having another boards connected to it, so yes once you locate the two legs of those two caps, you will be measuring the dc Voltage DIRECTLY AT THE TWO LEGS OF EACH CAPS I mention with bottom side of the board facing you (yes, do put the board on card board or insulator sheet). Notes: You WILL not be using the the chassis as the ground ref. point for DC voltage testing in the primary side of the circuit.

[newtothis2]

Re: Element ELGFT401

nothing, nada, no juice. what next?.

[selldoor]

Re: Element ELGFT401

Is the board plugged into the mains?


RULE - for voltage test board/set must be powered up
for resistance and most other tests the board/set should be unplugged

[budm]

Re: Element ELGFT401

OK we need to find out if are gettin B+ feeding the 5STBY circuit. Check the DC Voltage between point 1 (red probe) and point 2 (black probe), it should show around 160~170VDC.
I also need the P/N of that IC in red circle.

[newtothis2]

Re: Element ELGFT401

Yes there was 160-170 and the part number was ( I think) 62939.

[budm]

Re: Element ELGFT401

OK, so the stby is getting the B+ feeding it OK all the way to the SMPS transformer but the MOSFET that drives the transformer is not switching.
Please check the resistance of the Source SMD resistor R92, it should show very low Ohms.
So far I cannot find any info of that IC.

[newtothis2]

Re: Element ELGFT401

OK I'm using a cheap analog meter and I zeroed it first. Damn near 0

[selldoor]

Re: Element ELGFT401

You are really not helping us to help you fix this.
I believe in the US you can still buy a cheap multimeter for around $5.

"Yes there was 160-170 and the part number was ( I think) 62939."

When we ask for a voltage we need to know what it is - not a range and please put what it is volts ohms amps or whatever.


You THINK that was the part number - There are millions of parts out there
have we to guess. 6 0 G....... 2 S Z 5.......... 9 0 8......... 3 B 8 9 S

How long do you thing it would take to work through all the permutations?

If you cant read it try for a close up picture and we will have a go.

[newtothis2]

Re: Element ELGFT401

Ill get a digital meter. I was hoping for some help, wasn't expecting sarcasm. I will get A digital meter and a super duper magnifying glass. Thanks for all the ones that have helped, this is a learning experience.

[selldoor]

Re: Element ELGFT401

It is not sarcasm - it is constructive criticism, I dont think you appreciate how difficult it is to troubleshoot from a distance when we cant see the boards, have no idea what your
doing and getting answers that are not precise.

[newtothis2]

Re: Element ELGFT401

OK, I was hoping to gain some experience here. But were would I buy $40.00 board as stated. I'm all ready in the dog house for the dismantled TV.
Thank you for your time.

[newtothis2]

Re: Element ELGFT401

Is this the correct one.
http://www.shopjimmy.com/megmeet-mlt...wer-supply.htm

[selldoor]

Re: Element ELGFT401

I could say "well it looks about right"" but I wont . Your best plan is to do what it says in their ad:

Need help? Give us a shout!

Our friendly and knowledgeable customer service team is happy to help you with any questions.
Toll Free: (877) 881-6492
Español: (877) 881-6492 x. 303
Email: sales at shopjimmy dotcom
I believe they are very helpful - they like to supply the corrct boards if they have them. I think I would email and send pictures of the board and closeups of any barcode labels or board numbers you can see.

[newtothis2]

Re: Element ELGFT401

Ok, so I ordered the part. The world is good, all went fine.
Thank you guys for all your help.
I'm going to crack open another one now.

[budm]

Re: Element ELGFT401

OK, thanks for the follow-up, took you a long time to get the board?

[shelby5041]

Re: Element ELGFT401

how do u know the caps are good?"

did you test them or just do a visual?

just a visual is not always accurate and they need to be tested out of circuit using a esr meter....thats what i do but im novice but it does work and caps dont have to be bulged to be bad..........been there done that lol