Toshiba 32BV701B loss of audio

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Re: Toshiba 32BV701B loss of audio

Hi
Pin2 when sound is working is 3.35v.

Do you think its the audio ic..I have another board with the same one on and my god they are a bit of a pain to remove.

[tom66]

Re: Toshiba 32BV701B loss of audio

Ah... That's important. So when the audio is bad, the pin is definitely nearly 0V? Because that indicates a fault detected. Please double check that.

Causes:
* Short circuit or over-current on either speaker (possibly chafed wire, bad speaker coil: check resistance of speakers and try with only one speaker at a time)
* DC detect fault: most likely TPA3113

DC detect would be rare, as it would typically not be intermittent.

Also, see if audio cuts out if the volume is low, and if it cuts out quicker on high volume.

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Re: Toshiba 32BV701B loss of audio

[QUOTE=tom66;355334]Ah... That's important. So when the audio is bad, the pin is definitely nearly 0V? Because that indicates a fault detected. Please double check that.

Yep defo 0.3v when sound goes

Causes:
* Short circuit or over-current on either speaker (possibly chafed wire, bad speaker coil: check resistance of speakers and try with only one speaker at a time)
* DC detect fault: most likely TPA3113

DC detect would be rare, as it would typically not be intermittent.

I have used a set of speakers from an identical set and still the same

Also, see if audio cuts out if the volume is low, and if it cuts out quicker on high volume.

No tried this as best I can it doesnt matter if the volume is on 1 or full chat it seems to fail around the same sort of time from cold

[tom66]

Re: Toshiba 32BV701B loss of audio

You're probably looking at swapping the TPA3113 or a new 17MB60.

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Re: Toshiba 32BV701B loss of audio

I will have to try changing it because this by the looks of things has got an odd ball screen, I cannot see one with the same lvds connector.

[tom66]

Re: Toshiba 32BV701B loss of audio

What screen does it use? Samsung? If the connector is the same, you should only need to access service menu to change LVDS mode.

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Re: Toshiba 32BV701B loss of audio

Yes Tom its a Samsung screen but this one has got a t-con,where 90% of the others use the flat cable straight to the screen

And dont runaway I have just made a massive schoolboy error I need help with

[gnrlee]

Re: Toshiba 32BV701B loss of audio

hey guys!

sorry to but in I also have a problem very similar to the one stated on the same make,...
but mine is just loss of audio through the HDMI port all the scarts and phono jacks work fine,..

is this just a fault with the HDMI it's self and can it be rectified just by replacing that Control Board?

Thank you and sorry for butting in!

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Re: Toshiba 32BV701B loss of audio

This is getting to be a common problem on this main board, I phoned my TV repair mate yesterday and he has 2 of these with audio faults, an Alba and a Toshiba.

If you do go for a main then be careful matching the things up

[tom66]

Re: Toshiba 32BV701B loss of audio

gnrlee I would try a reset from service menu.

Press 4 7 2 5 Menu, or Menu 4 7 2 5 on remote to get to service menu then select reset ("factory reset")

[gnrlee]

Re: Toshiba 32BV701B loss of audio

Cheers Tom!

Yeah tried that but didn't change anything!
and both HDMI's are the same with no audio.
New board then?

[tom66]

Re: Toshiba 32BV701B loss of audio

I'd try that then.

Crappy Toshiba Vestel... When will Tosh learn! They are running their laptop brand into the ground with re-badged "Compal" rubbish, then they run their TV and AV line into the ground... soon there will be no more Toshiba! All at the expense of a quick buck & payout for some CEO.

[ReeceyBurger123]

Re: Toshiba 32BV701B loss of audio

Common issue on these is 4 little 470nf 6.3v ceramic capacitors that provide the feed back for this Ic failing, you can buy repair kits on ebay however they are very hard to install. I will link one for you.

[ReeceyBurger123]

Re: Toshiba 32BV701B loss of audio

Edit: Doh just seen how old this thread is !

[satinser]

Re: Toshiba 32BV701B loss of audio

Sorry to resurrect this post. ReeceyBurger123 you appear to infer that its just the smd caps that fail and need replacing? Have you found that the chip also needs replacing? Or is it included in the kit on the basis that it might fail. I havnt actually used this kit in the past as been able to get a replacement board but am unable to get hold of a board for the Sharp LC-32D12EA which has inter audio on 17MB60 so looks like the kit with ultra small smd caps is only option.

[comptek]

Re: Toshiba 32BV701B loss of audio

Sorry to resurrect this post. ReeceyBurger123 you appear to infer that its just the smd caps that fail and need replacing? Have you found that the chip also needs replacing? Or is it included in the kit on the basis that it might fail. I havnt actually used this kit in the past as been able to get a replacement board but am unable to get hold of a board for the Sharp LC-32D12EA which has inter audio on 17MB60 so looks like the kit with ultra small smd caps is only option.

can you supply a photo of the white label on the card slot i will see if i have one

[satinser]

Re: Toshiba 32BV701B loss of audio

Many thanks for your reply. I gave the possible customer a price based on the fitting the kit and he hasn't got back to me. Thanks though for your kind offer of looking into it for me.

[ReeceyBurger123]

Re: Toshiba 32BV701B loss of audio

Also try resetting the Tv first before replacing the caps.