[1000mp] MP with Flashing VFO-A, no Rcve, no Xmit... And no joy!

Fri, 23 Apr 2004 10:08:48 -0700 (PDT)

I had suspected this to be the case when I saw the symptom

It is most likely not be a hard fix.

I believe the Service Manual on CD from Yaesu is about $30.00.

A lot cheaper than the alternative.

--- Wendell Wyly - W5FL <[email protected]> wrote:
> I had same problem and got no response from list.  Below are the
> messages as
> well as the factory fix.  It was not a complex troubleshooting issue,
> though.  Two or three power supply measurements was all they did and
> replace
> the 8V regulator Ic.  See below.......
> 
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]On Behalf Of
> Wendell
> Wyly W5FL
> Sent: Sunday, October 29, 2000 10:40 PM
> To: [email protected]
> Subject: RE: [1000mp] 1000MP Just Quit
> 
> Mine did this a couple of years ago. The flashing display indicates
> that the
> phase locked loop is not locked which sent me off on several wild
> goose
> chases.  I sent it back and they listed:
> 
> Repair of VCO lock.  Replaced 8V regulator IC.  $1.36 for part and
> $82.50
> for
> repair plus $18.50 for shipping. It was not a Yaesu repair station,
> but they
> no longer do repairs.  Let me know how you make out with your repair.
> Obviously measure the input and output of the 8V regulator to see if
> it is
> working if you plan to do the work yourself.
> 
> -----Original Message-----
> From: [email protected] [mailto:[email protected]]On Behalf Of
> Dennis Dworak
> Sent: Wednesday, October 25, 2000 11:13 PM
> To: [email protected]
> Subject: [1000mp] 1000MP Just Quit
> 
> 
> Help,
> My wonderfull MP of a couple of years old just bit the
> dust.  Never had a problem with it before & it has no
> inrad mods or anything done.. Worked beautifully until
> today.. I normally leave it on all the time.. Came home
> from work & the digits on the main dial are all blinking
> similar to the microwave when the current goes off.. But
> nothing unusual had happened here today.. Also there is
> no receive audio at all.  Not from speakers or from any
> earphone jack.. Just nothing.. And no transmit either..
> Geez..  Digits on the sub dial don't flash but appear ok..
> VFO goes up & down freq ok & changes bands ok but
> the main dial just keeps flashing all the time.. I tried all the
> resets per the manual & even tried unplugging the radio for
> an hr & than retried the resets but just have the same thing..
> It almost seems like a PLL came unlocked or something..
> Has anyone else experienced this condition & what did it
> take to repair it..  Might save my radio a trip to Yaesu if
> anyone had this happen & was able to find the cause.. I
> will be checking my e-mail on Thursday before I give Yaesu
> a call..    Thanks for any help..
> 
> Denny
> K9AAV
> 
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On
> Behalf Of Larry Burke WI5A
> Sent: Friday, April 23, 2004 7:21 AM
> To: [email protected]
> Subject: [1000mp] MP with Flashing VFO-A, no Rcve, no Xmit... And no
> joy!
> 
> 
> I coulda swore I saw a similar problem posted recently, but a check
> (albeit
> quick) of the archives did not turn up what I was looking for.
> 
> I was in the shack this morning doing other things when the VFO-A
> display
> started blinking the frequency readout. At the time I had the AF gain
> all
> the way down, but when I turned it up there was nothing. Keypad
> tactile beep
> response was gone as well. No audio, no signal strength being
> indicated on
> S-meter. Also no transmit. The rig seems to change frequency/bands
> OK, but
> the display just keeps on blinking. VFO-B also produces no output on
> receive
> or transmit, but does not blink.
> 
> I ultimately tried the total CPU reset as a shot in the dark, but no
> joy.
> 
> This is a relatively early s/n original MP. Any ideas what the
> problem is?
> 
> 
> 
> Larry Burke WI5A
> Friendswood, TX
> 
> 
> 
> 
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=====
Harry - AB2PN

-

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