[Yaesu] FT-51 ill - looking for advice, PLEASE

[Avi - Modi'im Orchards]

Unfortunately, it is in standard uhf frequencies stored in tHE UHF memory 
side. VFO behaves the same. Other symptoms: one can hear a very low volume 
hiss from the speaker when the UHF side is turned on, regardless of volume 
or squelch settings. Turn off UHF, the hiss disappears.

The idea that the PLL is "out-of-lock" sounds reasonable, but I wouldn't 
know where to begin trying to diagnose such a thing. And I don't really 
suspect the memory back-up battery, even though I've never replaced it, 
because the memories never disappeared when turning the rig off.

I did a full reset (inadvertantly - and before I had written down all the 
memory contents - total bummer) and it still behaves the same way. I also 
tried playing with the squelch threshold in the hidden menus, and found an 
interesting thing: on VHF, one can change the values and see them change and 
be stored during the process. On UHF, it does not store changes, nor show 
them while they are being made.

Anybody know of a really good repair service for this HT?

-avi 4X6UA


----- Original Message ----- 
From: "KD7JYK" <kd7jyk at earthlink.net>
To: "Avi - Modi'im Orchards" <tiavi at netvision.net.il>
Sent: Tuesday, April 10, 2007 08:08
Subject: Re: [Yaesu] FT-51 ill - looking for advice, PLEASE


> Is it in WFM mode or out of VFO lock range, around 50 MHz or something odd
> in the 300 or 800 MHz range?  It has been a while since I have had 
> problems
> with my HT, but they have always been fixed with a full reset, then I have
> to reprogram the 600 KHz offset and 5 MHz offset, then all is well.
>
> Kurt
>
> ----- Original Message -----
> From: "Avi - Modi'im Orchards" <tiavi at netvision.net.il>
> To: <Yaesu at mailman.qth.net>
> Sent: Monday, April 09, 2007 9:18 PM
> Subject: [Yaesu] FT-51 ill - looking for advice, PLEASE
>
>
>> Howdy all,
>>
>> My favorite dualbander handi seems to be "stuck" on the UHF side. It has
>> gone totally deaf and refuses to TX, although pressing the PTT causes the
>> display to appear to transmit ( that is, the red LED lights up and the
>> S-meter moves upscale in proportion to the preset output power) . I can
> move
>> throught the memories normally, and if a vhf frequency is stored in a UHF
>> memory, it transmits FB (because it uses the VHF transmitter), but is 
>> deaf
>> on RX.
>>
>> The most telling symptom is that it shows a constant squelch open of one
> LCD
>> and the green LED remains lit. Changing the squelch setting does not
> change
>> this. Symptoms do not change regardless of whether the VHF side is turned
>> off or on.
>>
>> My instincts tell me it is not a hardware problem, so it seems some sort
> of
>> parameter needs to be reset.
>>
>> Has this happened to you? How'd you fix it?
>>
>> TIA,
>>
>> -avi 4X6UA
>>
>>
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>
>