[Icom] Re: Icom 765 without AM

[Ray V.]

Does the 765 have a combination RF/Squelch control like on the 756 Pro? 
The control operates as RF gain on SSB/CW etc and Squelch on AM and FM. 
It may be the squelch is too tight on AM but allows FM to get thru. Set 
your rig to AM and try rotating the RF/SQL (if you have one on the 765) 
and see if that helps.

73, Ray  W2EC

Rich Dailey, KA8OKH wrote:

>>My 765 no longer receives on AM, all other modes seem O.K.,
>>any ideas on where to start to look ?
>>Don  w0dg
>>
> 
> 
> Hi Don.  The areas you might look at in the receive path that are unique to the
> AM mode include the Am detector diode D151,  transistor Q83.  The .1 uf
> C288 coming off the emitter of Q83 may be bad also.  If you have access to a
> scope,  check for detected audio at pin 8 of U15.  If not there, backtrack to the
> emitter of Q83. 
> 
> All of this is on the MAIN unit circuit board.
> 
> Hope this helps,
> Rich, KA8OKH
> 
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> Rich Dailey, KA8OKH - Phyllis Dailey, KB4NPI
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