[Kenwood] TS820 Frequency Display Problem

[Jordan]

The digital boards have a long history of poor soldering, and bad 
contacts...You may get away with a good cleaning of the connectors, or you 
may need to re-do some of the soldering....There are aso Kenwood service 
notes about this if I recall....73...Jordan...VE6ZT

----- Original Message ----- 
From: <cosmophone at yahoo.com>
To: <efeustel at hughes.net>; <kenwood at mailman.qth.net>
Sent: Tuesday, May 18, 2010 8:39 AM
Subject: Re: [Kenwood] TS820 Frequency Display Problem


> It is common for this rig to have a problem with bad contact of the 
> bearing surfaces of the variable cap in the VFO if the unit has been 
> sitting idle for a long period of time. Usually this can be resolved by 
> running the VFO from stop to stop several hundred times or least through 
> range where the display misbehaves.  What is happening is that actual VFO 
> frequency is way off and the microcontroller is merely showing the 
> frequency it calculates.  You will usually see the frequency jump a large 
> amount when you hit the bad spot on the bearing. If lots of exercise of 
> the dial does not cure it then you may have to remove the side cover of 
> the VFO box and lube the cap with some silver bearing grease which is 
> available from Mouser.
>
> Brian WA5UEK
>
> Sent from my iPhone
>
> On May 18, 2010, at 5:56 AM, "Edward A. Feustel" <efeustel at hughes.net> 
> wrote:
>
> A ham I am trying to help has an 820 that has been sitting
> for a number of years after coming back from Kenwood repair.
>
> Frequencies listed may not correspond to bands selected!
> Sometimes they do, other times they do not.
> Looks like the number 8 does not display.
> One can hear hams on the set.  I have not tried to transmit.
>
> Anyone remember a simple cause for this kind of behavior?
> Thanks,
> Ed, N5EI
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