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

[Mike Schatzberg]

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.
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >--
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> >
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