[Kenwood] TS820S Repair Questions

[Brian Carling]

Thank you Don - this seems to be the unversal answer in fixing this.
I will try it in a day or two when I get a chance here!

On 18 Jan 2004 at 7:51, D & P Graham wrote:

> Hi All,
> 
> Bry, I have just repaired my 520S and serviced it for what sounds to
> be the same common problem. It is a bad contact on the grounding wiper
> on the VFO tuning capacitor. It is necessary to pull out the VFO
> completely in accord with the procedure detailed in the maintenance
> manual (available on the web for download). Remove the can and clean
> the wiping contact. Add some contact cleaner and exercise the
> capacitor. Maybe make sure the tension on the grounding contact is
> still OK. Then reassemble making sure to preserve the position of the
> capacitor relative to the dial.
> 
> A messy job but once started is not all that bad with care.
> 
> At least you can see the components unlike the modern surface mount
> stuff!
> 
> I'm not sure what you mean by "tumblers" but the dial scale on the
> main tuning knob can be moved by hand independently of the main knob
> to correct minor calibration shifts - maybe that's all that's needed?
> 
> 73...Don VK6HK
> 
> > Hi guys,
> > 
> > I have a newly acquired TS820S and the VFO is jumping
> > around pretty badly most of the time.
> > 
> > I also noticed that the "tumblers" for the 100 kHz positions
> > on the analog dial are not correct either.
> > They start coming out at 140 kHz instead of at 100 kHz.
> > 
> > The VFO jumping is a separate issue. At first I thought it was dirt
> > switches - either the function switch or band switch. But then I
> > noticed as I get higher up the dial, even the tuning dial itself
> > will cause it to suddenly jump from say 7160 kHz to 7885 kHz.
> > 
> > Does anyone have any ideas about where I might start looking for the
> > problem so I can fix it?
> > 
> > The rig was in storage for several years and prior to that had
> > supposedly worked just fine.
> > 
> > Any tips or pointers would be appreciated.
> > 
> > Thanks - Bry, AF4K
> > 
> > - - -
> > 
> > Your moderator for this list is:
> > Larry Wilson KE1HZ kenwood-owner@mailman.qth.net
> > 
> > _______________________________________________
> > Kenwood mailing list
> > Kenwood@mailman.qth.net
> > http://mailman.qth.net/mailman/listinfo/kenwood
> 
>