Dear Leo, I think this might help you, I had the same problem
With my ft1000.
*Look at your AF unit, then locate J3052 (POO9O622) it´s a little molex
connector with three wires,
All three are white, then close to that connector are two voltage
Q3028 (2SC2712GR) and Q3027 (2SD667C) , those regulators take 9V to 5V.
In my FT1000 Q3028 was damaged, but check those two, if one of them
are damaged replace them, those are easy to find in radio shack or
dealer near you, Well then those two regulators go to the Audio amp.
(TDA2003V) and then audio out.
Hopefully I can be usefull to you, my English is not good, please feel
to ask any question if I didn´t explain myself.
"It is no use saying, 'We are doing our best.' You have got to succeed in doing
what is necessary."
-Sir Winston Churchill
Lic. Andres Kim Leon
Tecnologias de Informacion
De: on4kj [mailto:email@example.com]
Enviado el: domingo, 08 de diciembre de 2002 9:31
Para: leo; firstname.lastname@example.org
Asunto: Re: [Yaesu] FT 1000D Audio Receive Problem
Seems to me that your AF ( Speaker ) Amp is in trouble, might be the Loud
Speaker on top, sometimes strange objects get in the LS.
From: "leo" <email@example.com>
Sent: Sunday, December 08, 2002 12:45 PM
Subject: [Yaesu] FT 1000D Audio Receive Problem
> What is wrong with my rig?
> I cannot describe how this happened.while I was listening to some QSO,
> something inside burnt and suddenly the audio started to sound awkward
> (non-readable) accompanied by a long and continuous "pprrrrrtt" sound.
> Fortunately with the headphones my receive is normal.
> What parts should be replaced? Anyone who can give me a part number and
> a supplier in the USA?
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