Samsung PS42C96HD Working picture but intermittent sound.

[Cinek]

Hi all interested.

I have the Samsung PS42C96HD at home after repairing it from switching itself on and of after while.
I just bought the repair kit from eBay fixing the problem with it.

Unfortunately the sound i was hoping will be fine after repair stayed the same.
I cannot hear the sound from speakers itself. Its just making sound like "poping" in one of them louder against other.
But using headphones I`m able to hear the sound when using input from tuner or other source but its switching off at moment of "poping" and then starts again. Intervals of 3 sec. at most.
I`ve checked the main power supply for any loosing of voltage but on cn801 and cn807 i didn`t find any issues.

advice will be helpful.
Thanks for reading.

[Sparks88]

Re: Samsung PS42C96HD Working picture but intermittent sound.

check if speakers are open circuit using ohms range on multimeter, unplug speakers from board first, to be done with set unplugged from mains.

[Cinek]

Re: Samsung PS42C96HD Working picture but intermittent sound.

Sorry for delay, i will do it now as i have new multimeter. my old one did not show Ohms for whatever reason.

[tom66]

Re: Samsung PS42C96HD Working picture but intermittent sound.

If that test doesn't reveal anything, check the 17VAMP from PSU, see if it drops out.

[Cinek]

Re: Samsung PS42C96HD Working picture but intermittent sound.

values form speakers themselfs are ok 8 Ohms.

On the board connector showed me as fallows:

for left speaker - 4.38 kOhm
For right output speaker - 9.36 kOhm.

Do I have an issue with logic board then?

[Cinek]

Re: Samsung PS42C96HD Working picture but intermittent sound.

If that test doesn't reveal anything, check the 17VAMP from PSU, see if it drops out.

Let me find the schematics and will get back to You.
Cheers

[Cinek]

Re: Samsung PS42C96HD Working picture but intermittent sound.

Let me find the schematics and will get back to You.
Cheers

i haven`t found any line in 17 V in there so i have checked the 18 V line.
results when breaking the sound was still the accurate ones. 18.50 V constant.

[tom66]

Re: Samsung PS42C96HD Working picture but intermittent sound.

Might be 18V... long time since I fiddled with one of these.
Picture of main board would be handy.

[Cinek]

Re: Samsung PS42C96HD Working picture but intermittent sound.

Here there are.