It is quite easy.  I've done a couple.  It plugs down on a little edge 
connector thing as I recall.  Severe c r s, but as I recall, it comews 
with some little pads with sticky stuff when you peal off the backing. 
One, the thin one as I recall,, goes under and the thick one on top so 
the thing is held in place when you put the radio back together.  You 
take out 4 screws on top cover, where speaker is, and 2 screws on each 
side.  I think you then have to move the speaker out of the way, as I 
said, been a few months since I did mine.  It is very obvious when you 
get the rig appart, and the board isn't nearly as small as the v s 3. 
BTW, if you want to open the radio up for mars or for more coverage, you 
want to do that before you plug in the little board as it covers these 
jumpers.  The mars mod is easy, a fairly noticable loop of wire you cut 
to open it up for that.  If you want it opened above 150, you have to 
clip a little tiny jumper, and I had to get sighted help for that one as 
it is very small.  Mars mod is easy though.

It is really easy, you'll see right where it goes when you take the top 
off.
73s
Butch Bussen
wa0vjr

On Tue, 20 May 2008, T Behler 
wrote:

> Hi, all.
>
> Well, I bought another Kenwood TMV71A at Dayton this past week-end, along
> with the VGS1 voice chip.
>
> The stuff was ordered through AES, and should be arriving at the home QTH
> within the next few days.
>
> I don't know if I'm getting braver or more cavalier in my old age, but I was
> wondering if anyone on the list has managed to install the VGS1 voice chip
> independently, and how you did it.
>
> I can get sighted assistance if needed, but I'm kind of interested in trying
> it myself, as long as that wouldn't be too risky or foolish.
>
> I would appreciate any thoughts or suggestions.
>
> 73 from Tom Behler:  KB8TYJ
>