17pw26-4

[charlierfc]

hi guys, i fixed this tv a while ago by replacing the bad capacitors.
now tv wont fire backlight. though tv does turn on the back light is off

i tested the backlight volts....its measuring 53 volts from psu?!

after taking cover off inverter i saw one of the fuses was blown

what would be causing the high volts to the inverter?

ic? sorry, im very much a novice!

any pointers would be appreciated.

[ReeceyBurger123]

Re: 17pw26-4

Unhook the inverter and mainboard, plug the Tv in the Psu starts all voltage rails check the 24v output see if its persistent first I had one where the inverter done some damage to the Psu due to shorting the 24v rail. Also make sure you have a good chassis ground and measuring in DCV !

Also can you upload images of the Tv please ?

[charlierfc]

Re: 17pw26-4

still the same volts with boards unplugged
ill up load some pics now

[ReeceyBurger123]

Re: 17pw26-4

Hmm thats odd, are you using chassis ground and DCV ? If still out of whack your meter is dud because if the Psu did go that high and out of spec it would not work at all.

[charlierfc]

Re: 17pw26-4

was seriously starting to doubt my meter, i put another battery in but still the same. for some reason my pictures are not uploading

[charlierfc]

Re: 17pw26-4

pic? if it uploads

[charlierfc]

Re: 17pw26-4

more pics

[ReeceyBurger123]

Re: 17pw26-4

Your measuring it on ACV lol set it to DC and let us know what you read.

[charlierfc]

Re: 17pw26-4

ahhhh wrong setting on multimeter! what a t*t.... ok so getting 24v to inverter, but one of the 125v fuse is out, how can this be blown with the 24v going in? must indicate another problem on the inverter... any ideas?

[ReeceyBurger123]

Re: 17pw26-4

And bad news too I know the fault with your inverter not an easy fix Will link my thread about the same one.

[diif]

Re: 17pw26-4

Plug your black lead into the port marked COM and measure again.

[ReeceyBurger123]

Re: 17pw26-4

Repair of this inverter, also your Psu will need some caps changing before it fails next too.

https://www.badcaps.net/forum/showth...=Ssi_400_14a01

[charlierfc]

Re: 17pw26-4

any point in replace F102 on the inverter? chances are it will instantly POP?

[ReeceyBurger123]

Re: 17pw26-4

Heres a Pw26 I repcapped, I really urge you to replace the caps on it as they wont be long off failing, replace them with brand new high quality capacitors.

[ReeceyBurger123]

Re: 17pw26-4

any point in replace F102 on the inverter? chances are it will instantly POP?

Yes read my thread I linked, if the fets blow the fuse will blow as well in most cases.

[charlierfc]

Re: 17pw26-4

so.....ebay for a new inverter..... i can replace caps ect...fets naaaa

thank you for all your help it is much appreciated.

[charlierfc]

Re: 17pw26-4

http://www.ebay.co.uk/itm/4614-Inver...IAAOSwHaBWiobD

would this pack fix the inverter? at only 3 quid.. worth a shot...they inverters are hard to get

[michael dranfield]

Re: 17pw26-4

Most common fault on the inverter is the FET s going short part is A04614 .

[vinceroger69]

Re: 17pw26-4

I have used this company before never had a issue with them some good prices too so for that price certainly worth a try.

[charlierfc]

Re: 17pw26-4

how do you figure out the faulty ones? the top fuse is blown, so i assume its the top of the board, how do you test these?