LCDV2257DVR no audio

[Amraks]

So this tv has tda1517 audio ic

I have measured voltage on pin 8(stby mute) and there was a tiny amount of voltage say 0.800v
I traced this circuit to a smd resistor (101)100ohm then following that it goes to another resistor 103(10kohm)
I then checked the voltage before this resistor which was 16v
I changed the 10kohm resistor still no sound.
I then by passed this resistor and had sound.

the question is how did this even function before the fault?
is there something I am missing?

[Andrew F. Ali]

Re: LCDV2257DVR no audio

j

[dick_barton]

Re: LCDV2257DVR no audio

Can the TV sound be turned On/Off in the menu or Service Menu? I turn mine off and use a surround sound unit.

[Andrew F. Ali]

Re: LCDV2257DVR no audio

Please ignore the post#2. I don't know what happened and I got 'J' alone in. What I had before I edited that post was that instead of using a wire jumper to bypass the 103 resistor that reads OK out of circuit. Try placing another 103 across it in parallel so you have 5kohms now and check if the sound is restored.

[Amraks]

Re: LCDV2257DVR no audio

Can the TV sound be turned On/Off in the menu or Service Menu? I turn mine off and use a surround sound unit.

if you have the service menu codes for this model teac I would love to see it.

[Amraks]

Re: LCDV2257DVR no audio

Please ignore the post#2. I don't know what happened and I got 'J' alone in. What I had before I edited that post was that instead of using a wire jumper to bypass the 103 resistor that reads OK out of circuit. Try placing another 103 across it in parallel so you have 5kohms now and check if the sound is restored.

i get the impression there is voltage missing some where. it might be on the psu I recaped all the secondary caps bar 1 which was a 25v 33uf which I didn't have.

[budm]

Re: LCDV2257DVR no audio

Can we see good clear pictures of the board and especially around the TDA IC?

[petehall347]

Re: LCDV2257DVR no audio

have you checked the headphone socket ? try headphones plugged in ..sound is turned off on tv with headphones in .

[dick_barton]

Re: LCDV2257DVR no audio

if you have the service menu codes for this model teac I would love to see it.

Sorry but my reply was a general reply. I don't have the same model tv but these functions are available on my Panasonic set.