[ICOM] IC-761 High Pitched Whine

[Barry Williams]

Tom,

The problem is usually caused by failure of the electrolytic capacitors.
They are pretty easy to replace. I have done a couple.  That is still a
good transceiver.  I have 7800 and 781s as backup, but still keep a 765.
If you have a schematic, you should be able to pick out the DC - DC
converter caps, order a set and you should be good for another 25 years.

73
Barry
KD5VC
On Nov 6, 2014 9:32 PM, "Tom Greenwood" <thegreenwoods1 at verizon.net> wrote:

> Hello all
>
>
>
> I have an IC-761 that has developed an intermittent high pitched whine.
> The
> sound is coming from inside the rig and not through the speaker.  The
> problem is that it is becoming more frequent.
>
>
>
> According to QSL.net, one of the possible causes is a DC-DC converter on
> the
> display board identified as DP-6.  Unfortunately, this device is no longer
> manufactured.
>
>
>
> Has anybody found an alternative to the DP-6 or a means to repair it?
>
>
>
> Regards and 73
>
>
>
> Tom Greenwood
>
> N1JQB
>
>
>
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