SAT Bat Transplant

[John Ross]

Hi,
The button cell is used when the capacitor, that charges every time you turn
the
unit on, uses it's charge up. That charge acts like a battery, and holds the
memory,
in RAM, till it is used the next time. That is why you should turn the unit
on, at least
once a week, when not in use.
If the unit is sent back, and it has been a while since a change,
Inventronics, will
change the battery pack, the button cell and the capacitor.
I found this out, when I didn't even turn my spare unit on for a while, and
it went to
lo battery indication, and even after a charge, I couldn't tune with it. It
had lost it's
housekeeping memory.
So after two or three battery pack changes, send it back for the major
change, since
doing all three yourself, could result in memory loss. No danger of loss in
the SAT lll,
it has a flash memory in the RAM. (I think)
Regards,
John M. Ross
Windsor, Nova Scotia, Canada
----- Original Message -----
From: "dale r fox" <foxpiano@juno.com>
To: <pianotech@ptg.org>
Sent: Tuesday, June 13, 2000 1:03 AM
Subject: Re: SAT Bat Transplant


> Hey Jim,
> be aware that there is another battery in the SAT II.  It is a Lithium
> Ion button cell (quarter sized)  mounted on the internal circuit board.
ryhgb > You have to remove a few small phillips head screws on the outer PC
board
> to reveal the little feller.  I'm not sure but I do believe that it is
> the one which holds memory when the unit is turned off and the power cord
> is pulled.   That one being old may lead to the eventual  loss of your
> operating system.  IOW's,   it won't work no how.   But you won't get a
> low bat signal for that battery.  Some of this is just a guess but I was
> once a genuine electronic wiz guy for the US Air Farce.   (Used to be Air
> Force but Billy Jeff has pretty much taken the steam out of any military
> we had.  Some think that is a good thing but I'd likely disagree with
> em.)  The new SAT III uses a different type of chip to hold the OS
> software so likely doesn't need this other battery..     Your PC has a
> similar battery to hold internal clock and stored BIOS info when the
> confuser is unplugged.   On the good side,  with 1200 mah nicads you'll
> be able to power not only your SAT but a small city in Ecuador as well.
>
>
> Dale F
>
> On Mon, 12 Jun 2000 15:24:55 EDT JIMRPT@AOL.COM writes:
> > re: Battery replacement on SATII
> >
> > Well it took longer to worry about than to do it! :-)
> > I used 4 AA, 1200mah, ni-cad industrial batteries, some tape solder
> > and PVC-E
> > glue and the deed is done....my "lo-bat" notice is gone, my memory
> > is intact,
> > and the new batteries are charging just fine.
> >  I believe that my main problem was a severely corroded solder
> > connection on
> > the negative wire lead and that if I had just cleaned it up and
> > resoldered
> > the connection everything would have been fine.  But since I had the
> >
> > batteries and other stuff, and the unit is 4 years old, I decided to
> > just go
> > ahead and do the transplant.
> >  Thanks for the help and encouragement.
> > Jim Bryant (FL)
>
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