[ICOM] IC-756pro RX ANT switching

[Adam Farson]

Hi Jerry,

The Pro2 still has the fuse; on the Pro3, the fuse was eliminated, but the
varistor across the RX-ANT socket has been retained.

Cheers for now, 73,
Adam VA7OJ/AB4OJ


-----Original Message-----
From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net] On
Behalf Of Jerry K3BZ
Sent: 15 January 2006 10:00
To: ICOM Reflector
Subject: Re: [ICOM] IC-756pro RX ANT switching

Is this procedure also good for the Pro2 and Pro3 ?

73, Jerry K3BZ

----- Original Message -----
From: "Adam Farson" <farson at shaw.ca>
To: "'ICOM Reflector'" <icom at mailman.qth.net>
Sent: Sunday, January 15, 2006 12:30 PM
Subject: RE: [ICOM] IC-756pro RX ANT switching


> Hi Dave,
>
> The fuse (DS111) is soldered in place. You can check its continuity by
> placing one meter probe on the centre pin of the RX-ANT jack, and the
other
> on one of the pads of L112 (RF UNIT board). I assume you have the service
> manual.
>
> To change out DS111, you will need to lift out the RF UNIT board.
>
> Cheers for now, 73,
> Adam VA7OJ/AB4OJ
>
>
> -----Original Message-----
> From: icom-bounces at mailman.qth.net [mailto:icom-bounces at mailman.qth.net]
On
> Behalf Of Dave G4GED
> Sent: 15 January 2006 05:58
> To: ICOM Reflector
> Subject: Re: [ICOM] IC-756pro RX ANT switching
>
> Hi Adam
> mni tnx for your reply.
> Well, when I switch to 1/R or 2/R, with a known good RX antenna plugged
into
> the RX ANT port, I hear absolutely nothing !
> I've looked at the Manual and opened up the radio and found that RF fuse
> (lamp) but cant find any way of getting my test probs onto one of those
tiny
> components in order to test the fuse's continuity.
> I was hoping it was unpluggable but it appears to be soldered. I darent
give
> it a pull to try incase I cause further damage.
> Could you please just confirm whether it is soldered in or not or any way
of
> testing it's continuity in situ?
>
> Tnx agn 73 Dave G4GED
>
> ----- Original Message -----
> From: "Adam Farson" <farson at shaw.ca>
> To: "'ICOM Reflector'" <icom at mailman.qth.net>
> Sent: Sunday, January 15, 2006 8:30 AM
> Subject: RE: [ICOM] IC-756pro RX ANT switching
>
>
> > Hi Dave,
> >
> > 1/R and 2/R switch the receive RF signal path from ANT1 or ANT2 to the
> > RX-ANT input. If the input is still "a wee bit deef" (like auld Mrs.
> > McGregor), the RF fuse DS111 (Part No.HRS-4160A) on the RF UNIT board
may
> > have gone open. (IC-756Pro Service Manual, p. 10-8).
> >
> > You can download the IC-756Pro service manual from Marcucci, mods.dk or
> > http://www.qsl.net/icom/
> >
> > Cheers for now, 73,
> > Adam VA7OJ/AB4OJ
> >
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----
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/



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