[1000mp] Mark V Clarifier Stability Problem and Its Repair

[Mike Schatzberg]

Hello Ron:

I wouldn't know that the rotation is removing metal, without disassembling
the encoder.  Since the control is returned to its original working
condition, the procedure doesn't seem to do damage as you infer.

Of course, you can rotate the control shaft at a much slower speed, for a
longer period of time, and probably get the same result.

I only know what worked, and I did say to do it with finesse, not in a rough
way.

Some may prefer to replace or repair the encoder, which you can always do
later, or some may prefer to let the encoder jump.

73,

Mike
WB2AJI
----- Original Message ----- 
From: "Ron" <wa0kds at yahoo.com>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Tuesday, January 18, 2005 11:08 PM
Subject: Re: [1000mp] Mark V Clarifier Stability Problem and Its Repair


> That's  not cleaning the contacts that is removing metal and sounds
> awful like an awful rough way to do it.
>
> Ron  WA0KDS
>
>
>
> Mike Schatzberg wrote:
>
> >Hello Yaesu Fans:
> >
> >Perhaps some of you have experienced the well known clarifier problem,
where as you adjust the clarifier, the frequency suddenly jumps greatly,
rather than smoothly, sometimes even reversing in direction.
> >
> >The disassembly of the radio, the removal of the encoder, the cleaning or
replacement of the encoder, and final reassembly of the radio may be
possibly avoided.
> >
> >It is possible to cause the contacts within the encoder to clean
themselves, by rapidly spinning the encoder shaft.
> >
> >A reversing battery operated variable speed drill, with a keyless chuck,
maybe attached to the encoder shaft after removing the encoder knob.  Use
some finesse as you gently attach the chuck, then rotate the encoder in one
direction at medium speed for about 60 seconds, stop, reverse the drill's
direction, and rotate in the opposite direction for 60 seconds.  This cycle
may be repeated once or twice.
> >
> >This procedure cleared the problem totally, with a couple of cycles of
encoder shaft spinning.  I wasn't looking forward to replacing or repairing
that encoder, this seems like a good procedure to try before a major repair
effort.  It took only several minutes to accomplish.  Don't put up with a
jumping encoder control.
> >
> >If you have the problem, please  let me know if this procedure worked for
you.
> >
> >Good Luck and Happy Dxing,
> >
> >Mike Schatzberg
> >WB2AJI
> >http://home.earthlink.net/~cherokeehillfarm/index.html
> >
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> >
> >
> >
>
>
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