[ICOM] The IC-471A Service Mystery

[Gary P. Fiber]

Rich,

Yes Icom never published a service manual for that radio. There was some 
in house information but for some reason a service manual was never 
published.
Your best bet is to contact Scott Malcom, he did most of those when they 
came ti Icom America or Kuni Okuma, he has done his share of IC-471's too.
Both are very capable techs.
The RF-YGR circuit board is most troublesome. Scott has some parameters 
of required test gear he found he needed to properly set up the PLL and 
RF-YGR. I can tall you off hand the Spectrum Analyzer with in most 
service monitors would not do the job.

Contact Scott at mts at toledotel.com and his web page with some IC-471A 
information is http://www.angelfire.com/biz2/mts/
Kuni Okuma is at www.w7jv.com
Both prefer email as they can respond when they have some time. They are 
reasonably quick to respond I suspect within a day or two.

Gary Fiber K8IZ

On 1/29/2010 9:44 AM, Rich Dailey (Gmail) wrote:
> Well, it's a mystery to me, at least.
>
> I've done repair on various models of Icom rigs on and
> off for the last 20 years - mostly 735's, 751(a), 761, and 765's.
> Not a business, mind you, although I did have an electronic repair
> business up until 2005. I repair my own rigs when I can, and help out others
> when asked.
>
> So I buy a 471A for a good price, my first Icom 70cm multimode.
> Knowing it has issues, I purchase intending to investigate the problems
> on my own.  Little did I realize that it would be so difficult, if not impossible,
> to find service data for this rig.  I've been told that a service manual was never
> published for this radio. I do have a schematic, a block diagram, and the owners
> manual, but no technical description, no alignment procedures, none of the
> information that I need to carry out a decent diagnosis and repair.
>
> So I ask:
>
> * Does Icom repair this radio?
> * Any outside repair shop? How do they do this without the service data?
>
> If there is a shop that can do the repairs (I suspect vco trimmer problems, not
> unlike the 765 issue), please contact me off-list if you can help.
>
> Thanks,
> Rich, N8UX
> http://home.windstream.net/ferncity/icom.htm
>
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