[ICOM] Bad TX audio on 775

[Igor Sokolov]

Thanks Art, same results here. No dayta sheet.
 I have also found that the chip is used in IC-703.

73, Igor UA9CDC



> OK, no spec sheet found. But I did learn quite a bit about the chip.
>
> Mitsubishi limits its distribution to Asian vendors, which is why I
> can't find it listed for sale in other market areas.
>
> There are many many many of these available in China and Japan, quite
> literally by the thousands.
>
> The spec sheet is probably available on the Japanese Mitsubishi
> website, in the Japanese language of course.
>
> A Japanese native who speaks and reads the language can probably
> locate a sheet in short order, but I don't think I can locate one as
> I am not fluent in Japanese.
>
> Many interent references lead to the MFC5282 by Freescale
> Semiconductor. This is NOT the same chip, don't waste your time
> tracking down this chip as you will be wasting your time.
>
> GL.
>
> Art
>
>
>
>
> At 10:51 AM 10/14/2006, you wrote:
> >No spec sheet found, but they are widely available in buk..........
> >
> >American Microsemiconductor has them in stock, less than 3 dollars each.
> >
> >See
> >
> >http://store.americanmicrosemiconductor.com/m5282fp.html
> >
> >Since this is an electronic attenuator, I would strongly suggest
> >confirming the audio input to the device is good before changing it.
> >
> >Still looking for data sheet::>
> >
> >
> >Art
> >
> >At 10:38 AM 10/14/2006, you wrote:
> >>It's a Mitsubishi electronic volume control, zero to 82 BD attenuation.
> >>
> >>Working on a spec sheet, stay tuned.
> >>
> >>Art
> >>
> >>At 06:01 AM 10/14/2006, you wrote:
> >>
> >>>Posting this for a friend:
> >>>His 775 got some distorted audio on TX. Careful tracing led  him to
suspect
> >>>IC8 M5282FP audio amp.
> >>>Service manual says pin 2 of the IC should be at 3.8V while in practice
it
> >>>is only 2.6V.
> >>>Does anybody know where  I can get data sheet on the IC?  Where one can
get
> >>>this IC from? Do you thing it is the IC or  rather some parts
(resistors,
> >>>capacitors) associated with this IC?
> >>>Any help would be appreciated.
> >>>
> >>>73, Igor UA9CDC
> >>>
> >>>----
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10/13/2006
> >>>
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> >>----
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10/13/2006
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> >----
> >Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> >Icom Users Net: Sundays, 1700Z, 14.316 MHz
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> >
> >--
> >No virus found in this incoming message.
> >Checked by AVG Free Edition.
> >Version: 7.1.408 / Virus Database: 268.13.3/474 - Release Date:
10/13/2006
>
>
> --
> No virus found in this outgoing message.
> Checked by AVG Free Edition.
> Version: 7.1.408 / Virus Database: 268.13.3/474 - Release Date: 10/13/2006
>
>
> ----
> Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
> Icom Users Net: Sundays, 1700Z, 14.316 MHz
> Icom FAQ: http://www.qsl.net/icom/