issues with 17pw26-3 tv boards

[planetsource]

hi all,17pw26-3,power to board and thats all,anybody who has dealt with this board and fixed all problems,please give details,many thanks

[tom66]

Re: issues with 17pw26-3 tv boards

It's a Vestel... In my opinion, those boards are replace on sight. So many problems!

[electrickal1]

Re: issues with 17pw26-3 tv boards

Guys, I have a Vestel 17PW26-3 which is giving a weak washed out picture, I was told to replace D821 (33v zener) but this board is missing this diode!!
Can anyone tell me where to start to repair this piece of garden fertilizer......

[tom66]

Re: issues with 17pw26-3 tv boards

The PSU should have very little to do with that fault. Can you supply a picture of the fault? It could be a panel problem or a t-con board problem.

[electrickal1]

Re: issues with 17pw26-3 tv boards

Hi Tom, yes I will post it tomo as I am currently not at home. This 26 inch Hitachi set had swollen caps on the PSU and one clearly vented, TV turned on ok but goes to a pale washed out picture and very blue almost like a negative photo effect.

[tom66]

Re: issues with 17pw26-3 tv boards

Hmm, good chance of a tab bond fault. I've had it on a 26" Sanyo/Vestel LCD before (using a Chimei V260B1 panel.)

[masaudio]

Re: issues with 17pw26-3 tv boards

On one at the moment, original fault was blown fuse and shorted Q803.
after this was replaced it was getting red hot, not coming out of standby..
Tried the control IC802, still nothing until the Q803 failed again.
Then discovered mains smoothing cap C819 was totally open circuit.
Replaced the cap, transistor and fuse all again and now the set sits in standby ok, no overheating.. but when you turn it on it tries to come on then shuts back to standby again. to be continued....

[masaudio]

Re: issues with 17pw26-3 tv boards

next step.. if i unplug the inverter connector the set comes on and stays on, with sound etc so seems to be the 24v output to the inverter is tripping the power supply off again.

[vinceroger69]

Re: issues with 17pw26-3 tv boards

what invertor board is the set using in a post the otherday someone else was having the same issue can you force on the psu and place a load on the 24v rail and see if it still shuts down.

[masaudio]

Re: issues with 17pw26-3 tv boards

its using an LG display, with an LG Innotek inverter board.

[dick_barton]

Re: issues with 17pw26-3 tv boards

Have you a photo of your power supply. A nice sharp image would be useful.