[Icom] IC-751 FM Unit Schematic wanted

Thu, 24 Jan 2002 22:39:26 -0600

I don't think there is a separate board for FM for the IC-751. 
The radio comes equipped to receive FM (at least mine did 
when I bought it new).  I don't have a service manual for the IC-751, 
but I did get a manual for the IC-751A.  It shows the FM detector as 
an integral part of the radio, not like the IC-720 and some others 
where FM required an outboard plug-in board.

If you look at Illustration 2-5 which is the Main Unit, you se the FM 
modulator circuit right in center left section right about the CW, RTTY 
oscillator section.  I don't think this is a separate board.  

On the right side, you see the FM IF, FM Detector circuit.  Again, 
it is an integrated part of the Main Unit and not a separate outboard 
item.  

Or perhaps I misunderstood your question. 

I hope this is helpful. 

Micheal Salem N5MS

On Fri, 25 Jan 2002 00:23:58 -0000 "Michael P. Olbrisch"
<[email protected]> writes:
> 
> 
> > -----Original Message-----
> > From: [email protected] 
> [mailto:[email protected]]On
> > Behalf Of Stuart Rumley
> > Sent: Thursday, January 24, 2002 3:11 PM
> > To: [email protected]
> > Subject: Re: [Icom] IC-751 FM Unit Schematic wanted
> > 
> > 
> > Michael-
> > 
> > Thanks for the offer to help.  I don't know what the model of 
> > the FM Unit is, its just a small internal board on the main deck.  
> 
> > I've looked through the service manual I have an cannot find 
> > any reference to the board part number or model number.  
> > What do you have?
> > 
> > Stuart
> 
> What I have is two units.  I have an IC-740 with the FM unit, and
> I also have an IC-551D with an FM unit.  Both are back-up radios,
> and they are stored away in a place difficult to get to.  If you can
> tell me the unit number, like EX-306 of whatever, I can look it up
> and see if that is what I have.  Dunno, you may also have the one
> that goes in the IC-725.  I don't believe the 751 used the unit 
> for the IC-551, but it might be the one for the IC-740.  Let me
> know.
> 
> Mike.
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