[ICOM] Icom R-8500 PLL Problem

[GGLL]

	Ken, if the reference oscillator trimmer is faulty, the basic 
oscillator would not work, and so the whole radio. Icom has many 
problems with PLL and associated (which become dirty with time) trimmers.

	Check the ref osc trimmer noting its position and turning it back and 
forth a couple ot turns, although this may bring it to working condition 
again, it is wise to replace the component as soon as you can.

Regards
Guillermo - LU8EYW/W.

El 02/07/2011 11:00, Ken Simpson, W8EK escribió:
>
> Thanks, Adam.
>
> The problem I have is different that his (at least I think so), in
> that it is simply the blinking display, that I think indicates a PLL
> problem.
>
> I hate to send it out for repair, especially if it is something simple.
>
> However, if a PLL is unlocked, I would think it would only be one PLL,
> and would work on some frequencies and not others.  That is why I am
> wondering if I am missing a jumper, or something simple like that.
>
> Thanks.
>
> 73,
>
> Ken, W8EK
>
>
> Adam Butler wrote, On 7/2/2011 12:32 AM:
>> Not sure if this will help but I came across a post at radioreference
>> today from a guy with a similar sounding problem. He did not go into
>> detail as his post was to rant about shipping costs back to Icom but
>> maybe you could ask him what he knows of the issue.
>>
>> The post is here:
>> http://forums.radioreference.com/icom-receivers/215381-r8500-canadian-service-depot-finally.html
>>
>> At 05:33 PM 7/1/2011, you wrote:
>>
>>> I have an Icom R-8500 receiver that came from a silent key.
>>>
>>> It would appear that it has a phase locked loop problem.  The
>>> frequency on the display is flashing all the time, regardless of what
>>> frequency I put in.  That also means no audio, basically like the
>>> squelch is fully on.
>>>
>>> However most every other function appears to work.  I did do a reset,
>>> and that makes no difference.
>>>
>>> It is almost as if there is a jumper some place that is needed, but I
>>> can not find any information like that.  Of course it is a bit hard to
>>> ask the silent key about it!
>>>
>>> Any one have any suggestions?
>>>
>>> Thanks.
>>>
>>> 73,
>>>
>>> Ken, W8EK
>>>
>>> Ken Simpson
>>> E-mail to W8EK at FLHam.net or W8EK at arrl.net
>>> Voice Phone  (352) 732-8400
>>>
>>>
>>>
>>>
> ----
> 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/
> To support QSL/QTH.net: http://www.qsl.net/donate.html
>
>