Spectroniq PLTV-3250

[l clark]

I have replaced the power board after it would not turn on no leds
Now it comes on , has sound ,the screen lights up for a few seconds then goes black .
with a flashlight i can see the image
whats the problem now.
Thanks for your help

[budm]

Re: Spectroniq PLTV-3250

Does it look like this chassis? This TV uses DARFON which is known for having bad inverter transformers, but check the fuses on the inverter board first, then give us the P/N as printed on your transformers so you can check out the winding resistance.
http://s807.photobucket.com/albums/y...20PLTV%203250/

[l clark]

Re: Spectroniq PLTV-3250

yes i will check the fuses tonight
what makes the screen come on for 3 seconds?

[tom66]

Re: Spectroniq PLTV-3250

Common fault is the transformer fails so one bulb doesn't light, there are about 6~12 in a 32" LCD.

When one doesn't light the inverter detects this and shuts off after 5 seconds.

If you look carefully on a white background it's sometimes possible to see the unlit bulb.

[l clark]

Re: Spectroniq PLTV-3250

did the power supply cause the inverter to fail
or vise versa

is the Panasonic VIERA TC-L32C5 32-Inch 720p LCD TV
a decent model

[selldoor]

Re: Spectroniq PLTV-3250

did the power supply cause the inverter to fail
or vise versa

You have not yet established that it IS an inverter transformer fault - it could be faulty wiring or a faulty bulb.

[l clark]

Re: Spectroniq PLTV-3250

Does the power supply give power to the inverter system
there are two identical harnesses from the power board that are routed to the inverter boards area

[tom66]

Re: Spectroniq PLTV-3250

Yes. Majority of power supply power goes to the inverters.

[selldoor]

Re: Spectroniq PLTV-3250

can you do as it says in post 2 and also post pictures of your boards

EDit

Sorry guess its not night yet over there!


Welcome to the forum-
We can help a lot more if you please post good clear pictures of the whole chassis, and then pictures of each board, front and back (in the same orientation) and close up of connectors, (max resolution 2000x2000 and 2MB) using the manage attachments button, which is found by clicking "go advanced" under quick reply.

Please do not post inline and offsite as they slow down the loading of pages.

Examples of what is needed
https://www.badcaps.net/forum/attachm...1&d=1290283049

https://www.badcaps.net/forum/attachm...7&d=1280167246

It will be useful if you can say a bit about yourself - skills tools etc.

[l clark]

Re: Spectroniq PLTV-3250

im home now
where are the inverter fuses located so far ive looked under both inverter covers could not find any fuses there
thanks

[budm]

Re: Spectroniq PLTV-3250

The inverter boards, one is close to the bottom left corner under the metal shield, the right one looks like is under the shield close to the bottom right corner (not 100% sure). I do not see the pictures of your inverter boards.
It looks like your chassis has Master/Slave inverter boards setup. Do they look like these?
http://www.shopjimmy.com/protron-hiu...ter-master.htm
http://www.shopjimmy.com/protron-hiu...ve-rebuild.htm

[l clark]

Re: Spectroniq PLTV-3250

yes i can see no fuses in any of them

[l clark]

Re: Spectroniq PLTV-3250

ive got it down to the metal plate covering the screen
still no fuses power board its the only fuse i see and its good
whats the volts the inverters should receive

[budm]

Re: Spectroniq PLTV-3250

It has fuses on them, F1, F201. Please post the pictures of the inverter boards.

[l clark]

Re: Spectroniq PLTV-3250

would it still light up for a few secs if the fuses were blown

[l clark]

Re: Spectroniq PLTV-3250

getting pics now

[l clark]

Re: Spectroniq PLTV-3250

just checked fuses they show continuity

[budm]

Re: Spectroniq PLTV-3250

OK, check and see if you have 24vdc (black probe on the chassis, red probe on the fuse) on those two fuses of the inverter board when it blacks out, the inverters run on 24vdc

[l clark]

Re: Spectroniq PLTV-3250

ill ck now
be right back

[l clark]

Re: Spectroniq PLTV-3250

25 volts steady at either side of fuse i could not locate the other position