[ICOM] IC-745 & IC-EX242 FM board

[Michael P. Olbrisch]

Although the problem seems to stem from the FM module, dig a bit deeper.
Other than the installing and removing of the FM board, your symptoms
describe exactly what is the number 1 problem of the 740 series.  That is a
bad speech compressor switch.  When I sold my 740 I installed a new switch
and sent along a spare - just in case.

If it is your switch, make every effort to just replace it.  Cleaning it at
best is an iffy proposition - it just doesn't work.

GL.


Mike.  KD9KC

My E-mail address: mike2004 at elp dot rr dot com
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> -----Original Message-----
> From: icom-bounces at mailman.qth.net
> [mailto:icom-bounces at mailman.qth.net]On Behalf Of Reid Bishop
> Sent: Wednesday, January 12, 2005 1:19 AM
> To: 'ICOM Reflector'
> Subject: [ICOM] IC-745 & IC-EX242 FM board
>
>
>
> Hi,
>
> I recently plugged a never-used IC-EX242 FM board into my
> IC-745.  Seems to
> work great, but I did end up with one issue.  When this board
> is plugged in,
> the 745 refused to output any power whatsoever in SSB, RTTY,
> or CW mode.
> All the relays click, the TX lamp lights up, but absolutely
> zero output.  TX
> on FM works fine.
>
> Once I pulled the IC-EX242 board out, then SSB, CW, and RTTY
> modes worked
> fine again.  I plugged the EX242 back in, carefully following the
> instructions just to be sure, and it still had the same problem.
>
> Any thoughts?