Re: Unable to upload to photos section

I was FINALLY able to put it in the Files section but not in the Photos 
section.. Go figure.
I finally found my copy of the 2001 schematic and compared it with a 
more recent schematic I found on the web.
In 2001 there was a battery, in the newer schematic there is no battery.

I'm still tracing the circuits to determine what it is trying to supply 
power to. It is trying to keep the CPU running
to keep the clock up to date plus a bunch of parasitic loads on the 
control board then it wanders off to the IF board
but I have not traced that board yet. In short it it doomed to failure 
after a few minutes or hours.

So Vertex-Yaesu gave up on the battery and others should also. If your 
radio has a battery get it out before it damages the radio.

Electronics has been my hobby for about 55 years, and my vocation for 
about 45 years as a design nit-picker for some of the worlds biggest 
aerospace and defense companies. I may not have seen it all, but I know 
a bad idea when I see one. This is a bad one. By the time I am done, I 
will probably know more about the battery backup in a VR-5000 than the 
designer did.

Dave - AC2GL

On 2017-02-13 09:31, 'Bill Jones' [YaesuVR-5000] wrote:
>
> The picture is there. Just looked at it.
> Caption says that newer models don't have battery. I have an old
> original model, and it definitely doesn't have a battery at that
> location. I've had it apart several times, and have never seen a
> battery. Maybe they had the battery there for a while, but abandoned
> the idea??
>


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