[Yaesu] FT1000mp scanning VFO @ startup (heating up problem)

[Cecil Acuff]

Without looking at the schematic I don't know where to expect the problem 
would be except in the frequency selecting elements of the circuitry. 
Personally I would let the radio stabilize with the covers off then hit 
various areas with a can of freeze spray.  That should allow you to locate 
the offending component quickly.  I've done this in the past with freeze 
spray and a small component heater (looks like a small blow dryer) many 
problems have been identified and solved.

Cecil...
----- Original Message ----- 
From: "ON4AOI" <on4aoi at skynet.be>
To: <yaesu at contesting.com>
Sent: Friday, September 01, 2006 10:08 AM
Subject: [Yaesu] FT1000mp scanning VFO @ startup (heating up problem)


> Hello All,
>
> Maybe someone has a clue or suggestion where to look
> For this very strange problem, I'm trying to repair
> a FT1000mp from a friend.
>
> When you switch the radio on @ 10/50 deg C/F environment temp
> VFO A starts to scan down (every time) for +/- 10 min and is realy
> Changing the frequency not only the display.
> VFO B remains on the last setting , so this one is ok
>
> When going in XMIT the display doesn't change anymore
> And is on the displayed frequency transmitting.
> When stopping XMIT he scans down again until that certain time.
>
> When environment temp is 20/68 deg C/F the problem stops after 2 min
> When environment temp is 25/77 deg C/F the problem stops after 10 to 15 
> sec
>
> It is a temp related problem for sure but very strange that it's only for
> VFO A and also not when in TX.
>
> BTW leaving the radio on day/night solves this problem but
> that's not what my friend want.
>
>
>
>
>
> 73 Guy ON4AOI
>
> BAND DECODER and related stuff at
>
> http://www.on4aoi.be/banddecoder.htm
>
> DX4WIN soft and related stuff at
>
> http://www.on4aoi.be/dx4win.htm
>
> DX4WIN, WRITELOG, WF1B & RITTY CW & RTTY interfaces at
>
> http://www.on4aoi.be/keyer.htm
>
> ARSWIN link and related stuff at
>
> http://www.on4aoi.be/web7.htm
>
> DXTELNET soft and related stuff at
>
> http://www.on4aoi.be/dxt.htm
>
>
>
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