[1000mp] Strange behavior with my VRF/MEM CH Control

[Mike Schatzberg]

Gary, no one ever reported damaging the encoder on this reflector that I am
aware of. We are talking about rotating it at a relatively low speed.  But
of course, it is already damaged, does not work properly, and your only
other option is to replace it.  There is nothing to loose here trying to
save it.

Some encoders may be too far gone for this method to help, but others will
gain benefit.

Use some finesse if you choose to try it.  It does work for some encoders.
This is a more or less a standard option for many repair stations.

73,

Mike
W2AJI
----- Original Message ----- 
From: "Garry Shapiro" <garry at ni6t.com>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Wednesday, September 20, 2006 5:09 PM
Subject: RE: [1000mp] Strange behavior with my VRF/MEM CH Control


> Mike:
>
> I am aware of that treatment from an earlier round on the same subject. I
> believe I even tried it on the clarifier. But if I recall correctly,
reports
> indicated that results vary widely and that spinning the shafts, far from
> being a panacea, may risk damaging the unit.
>
> Garry, NI6T
>
> -----Original Message-----
> From: 1000mp-bounces at mailman.qth.net
> [mailto:1000mp-bounces at mailman.qth.net]On Behalf Of Mike Schatzberg
> Sent: Wednesday, September 20, 2006 1:48 PM
> To: All about Yaesu 1000mp
> Subject: Re: [1000mp] Strange behavior with my VRF/MEM CH Control
>
>
> Hello Garry:
>
> I have had problems with the Clarifier encoder on my Mark V.  I wanted to
> avoid the change out of the encoder, so I attempted to repair the encoder
> with a spinning method.  It restored the encoder to proper operation.
After
> several years, it again began to behave erratically, and I repeated the
> procedure.  The clarifier is still working fine several years later, and I
> have not had to repeat the process.
>
> You can see the method here:
> http://www.va3cr.net/markv/Troubleshooting/Clarifier.htm
>
> The method has been posted on the VA3CR website.  Perhaps you can try the
> same procedure and see if you can clear your problem as well.  I would be
> most interested to hear how you make out.
>
> 73 and Happy DXing,
>
> Mike
> W2AJI
> ----- Original Message -----
> From: "Garry Shapiro" <garry at ni6t.com>
> To: "Steve Fraasch" <sfraasch at earthlink.net>; "All about Yaesu 1000mp"
> <1000mp at mailman.qth.net>
> Sent: Wednesday, September 20, 2006 4:34 PM
> Subject: RE: [1000mp] Strange behavior with my VRF/MEM CH Control
>
>
> > Many MP and Mk.V owners have reported erratic operation of the optical
> > encoders on the radios. On my MP, both the Clarifier and the MEM/VFO CH
> > encoders exhibit this behavior; the Clarifier acted up first, the
MEM/VFO
> CH
> > control more recently. Both are HIGHLY ANNOYING.
> >
> > That both function erratically and that many report this problem
strongly
> > suggests that the encoders themselves are defective in the long run. If
> so,
> > the +5V supply and the solder connections are not likely to be the
> culprits.
> >
> > YMMV.
> >
> > Garry, NI6T
> >
> > -----Original Message-----
> > From: 1000mp-bounces at mailman.qth.net
> > [mailto:1000mp-bounces at mailman.qth.net]On Behalf Of Steve Fraasch
> > Sent: Wednesday, September 20, 2006 4:32 AM
> > To: All about Yaesu 1000mp
> > Subject: Re: [1000mp] Strange behavior with my VRF/MEM CH Control
> >
> >
> > Bob:
> >
> > You'll need to get inside to the front panel.  THe VRF/Mem Channel knob
is
> a
> > rotary encoder.  It is the ENC-A-Unit shown on the bottom right of the
> > schematic sheet that shows the overall block diagram.
> >
> > Check solder connections, check the +5V supply to the board and encoder,
> and
> > then with a scope, note the activity on the mem 1 and mem 2 lines.  It
may
> > be that the encoder itself is bad, not the switch.
> >
> > Good luck,
> >
> > Steve, K0SF
> >
> > -----Original Message-----
> > >From: Bob Martin <bob.martin at charter.net>
> > >Sent: Sep 20, 2006 6:04 AM
> > >To: 1000mp at mailman.qth.net
> > >Subject: [1000mp] Strange behavior with my VRF/MEM CH Control
> > >
> > >I have noticed some strange things going on with the VRF/MEM CH control
> on
> > >my Mark V.   When I use it for any of its functions it is very erratic
or
> > >unpredictable.
> > >
> > >When I turn the control left or right it sometimes will jump all over
the
> > >place and is
> > >
> > >almost unusable at times.  Most of the jumping around occurs when I am
> > >moving the control to the left.  As anyone else had this problem.  I
just
> > >love my Mark V.  It keeps me on my toes.
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >--
> > >No virus found in this outgoing message.
> > >Checked by AVG Free Edition.
> > >Version: 7.0.405 / Virus Database: 268.12.5/451 - Release Date:
9/19/2006
> > >
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