[1000mp] 20 meters dead

[T. David Cohen]

Thanks again to everyone for the advice!  It was right on and now my 1000mp
is back up and running on 20 meters.

Dave, N7TC

-----Original Message-----
From: 1000mp-bounces at mailman.qth.net [mailto:1000mp-bounces at mailman.qth.net]
On Behalf Of smOkco
Sent: Saturday, September 24, 2011 5:57 PM
To: All about Yaesu 1000mp
Subject: Re: [1000mp] 20 meters dead

Hi David

Deric is right:  it is the known VCO problem.

Almost surely a cold solder. After several such problems with the different
VCOs of the FT 1000 MP my friend CX2CKcame to the conclusion that it is the
bad soldered coils of the circuit which create the stop of a VCO.
So heat under the corresponding coil of the VCO, I believe it is VCO nr 2, I
dont have the papers in front of me to check it.
Good luck

73 de cx7co  carlos





________________________________
From: Deric Affleck <deric.vy2da at bellaliant.net>
To: All about Yaesu 1000mp <1000mp at mailman.qth.net>
Sent: Saturday, 24 September 2011, 14:51
Subject: Re: [1000mp] 20 meters dead

Hi David,

Sounds like the Local Unit board located under the Antenna Tuner - hard to 
get at but it is do-able.
Probably one of the phase locked loops has quit oscillating - the one that 
is for 20 meters. If you are lucky it might come to life if you "tweak" that

stage with a tuning tool to get it going again. What happens sometimes the 
voltage drops off shutting down the oscillator. It is a known problem and 
sometimes it can be a cold solder joint then requiring removal of the local 
unit board to access the solder side and by examining the solder joints with

a magnifying glass you can see an "iffy" jointor two which you can re-heat. 
CAUTION: you have to be careful when handling this and other boards to use a

grounded anti-static wrist strap to ensure you don't harm the board 
components. I has similiar symptons with my 'MP except it was all bands - 
the sub-receiver worked OK but no receive or transmit on any bandand turned 
out it was a transistor supplying voltage to all the phase lock loop 
circuits.
If you don't have the service manual I suggest you borrow or buy one as it 
is an asset for servicing the "MP.

Hope you can solve the problem.

73,

Deric, VY2DA
----- Original Message ----- 
From: "T. David Cohen" <tdavid26 at cox.net>
To: <1000mp at mailman.qth.net>
Sent: Saturday, September 24, 2011 12:46 PM
Subject: [1000mp] 20 meters dead


> Hi folks,
>
>
>
> A problem with my MP - 20 meters is dead on the main receiver  and there 
> is
> no RF output (the display works fine and the VFO seems to be OK).   The 
> sub
> receiver seems to work OK on 20 but when using that VFO, still no output.
> The other bands seem to be OK when using the main receiver and there seems
> to be normal RF output.  I've tried a reset but the symptoms are 
> unchanged.
>
>
>
> Any suggestions would be appreciated including a suggestion on a shop that
> might be willing to repair it.
>
>
>
> Thanks!
>
>
>
> Dave Cohen, N7TC
>
>
>
> ______________________________________________________________
> 1000mp mailing list
> Home: http://mailman.qth.net/mailman/listinfo/1000mp
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:1000mp at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html 

______________________________________________________________
1000mp mailing list
Home: http://mailman.qth.net/mailman/listinfo/1000mp
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:1000mp at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
______________________________________________________________
1000mp mailing list
Home: http://mailman.qth.net/mailman/listinfo/1000mp
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:1000mp at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html


-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1410 / Virus Database: 1520/3916 - Release Date: 09/24/11