[TechAssist] Re: Fw: Re: Toshiba CF3566A (Tac9190)Blows Audio Output I.C.?

  • From: "Bruce Tiedeman" <btied@xxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Fri, 21 Jan 2005 21:49:54 -0500

Yes I could try but only have this one Audio I.C left. If it doesn't work
will have to order another. May have to try this in the end.
thanks Larry,
Bruce.

----- Original Message -----
From: "Larry E" <videotech@xxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, January 21, 2005 9:15 PM
Subject: [TechAssist] Re: Fw: Re: Toshiba CF3566A (Tac9190)Blows Audio
Output I.C.?


> Bruce, why not tie a 8-10 Ohm 10-20 watt resistor to the speaker wires?
This
> will act as a speaker load
> and should give you your answer, just a thought,
> Larry Eastman
> American TV & Electronics
> Crystal River, Fl. 34428
> ----- Original Message -----
> From: "Bruce Tiedeman" <btied@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, January 21, 2005 8:03 PM
> Subject: [TechAssist] Fw: Re: Toshiba CF3566A (Tac9190)Blows Audio Output
> I.C.?
>
>
> > Audio Output I.C shorting on internal audio setting only!
> > I spoke to soon on this set. This chassis is difficult to work on having
3
> > separate boards that tie together. I removed the chassis and left the
> > cabinet in customers home. The set has High Voltage and Audio now ,after
> the
> > audio and power supply repair.. If I put the audio switch on back of
> chassis
> > to internal setting it blows the Audio Output I.C immediately. "On
> external
> > Audio it works good audio and all". Is it possible the "speakers have to
> be
> > hooked up" on this chassis to prevent this problem. I have gone over the
> > circuit many times and all voltages check good. ( with external audio on
> > only). I am stuck with this problem? Have not seen any thing like this
> > before, but don't work on many Toshiba sets with this type chassis. I
have
> a
> > print and followed the audio from main chassis to AV board and back to
> main
> > chassis again, I can not find any part tied to this circuit that would
> cause
> > this.. I have blown a few of these audio I.C's ,it is getting costly.
> > any help on this appreciated,
> > Bruce.
> >
> > B&T Electronics
> > 139 Margaret St
> > Sarnia Ontario
> > Canada
> > N7T 2Y3
> > 519 344 1850
> >
> >
> >
> >
> >
> > Subject: Re: [TechAssist] Re: Toshiba CF3566A (Tac9190) No Start Relay
> click
> > only!
> >
> >
> > > Fixed! Thanks for the help , found a bad cap (C651) at the audio
> > > output I.C, it was leaking causing the output and diodes to short in
> that
> > > section. .
> > > I also repaired the power supply.
> > > Bruce.
> >
> >
> >
> >
>
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