[ICOM] 761 Problem

[Mort Arditti]

Robert,

You can find the manual at www.mods.dk
It is a free download.  You need to register and are allowed one download a 
day
so set up some priority.
I hope this helps,

Mort,  NA6MA


----- Original Message ----- 
From: "Robert Brucker" <rbrucker3 at cox.net>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Thursday, August 12, 2010 8:23 AM
Subject: Re: [ICOM] 761 Problem


> Hi Allan, Do you have the repair manual? Robert W6LFO
>
> On Aug 11, 2010, at 10:26 PM, Wayne Johnson wrote:
>
>> Gday Allan, Sounds like the PLL VCO's are either unlocked or on the
>> verge of unlocking. Most of that generation of Icoms had bad plastic
>> trimmer caps used to set up the lock voltage in the individual vco's,
>> over time they become faulty (some say because of resin contamination
>> from when they were first soldered into place.You may find some bands
>> are OK, there's 4 of them in the radio and it's a common failing
>> Replace them with good quality ceramic types, they were available at
>> Altronics (Check the service manual for values required)
>> Easy the replace and setup the correct loop voltage, the service manual
>> shows the procedure for adjustment, you should only need a good digital
>> Multi meter.
>> Best to check the loop voltage first for the band and frequency as
>> detailed in SM, if it is not at spec. replace the trimmers.
>>
>> Cheers and all the best
>>
>> Wayne
>> VK6EH
>> ----
>> 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
>
> ----
> 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