The Yamaha AN1x Synthesizer mailing list

Hi Bruce,
    My tech 2\ufffd here:  I think I've seen schematics that provide a trickle
charge to the lithium battery when AC is on.  I thought this was a pretty
common practice - just give the battery 3VDC from the power circuit while
the unit is on and the battery gets charged... but that may have been a
unique design.

Ed Edwards
Leader: Ezekiel's Wheel      \ufffd\ufffd\ufffd\ufffdRetro-Progressive Rock\ufffd\ufffd\ufffd\ufffd
http://www.untiedmusic.com/ezekiel
http://artists.mp3s.com/artists/227/ezekiels_wheel.html
\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd\ufffd.\ufffd\ufffd

----- Original Message -----
From: "Bruce Wahler" <bruce@...>
To: <AN1x-list@yahoogroups.com>
Sent: Saturday, March 01, 2003 7:03 PM
Subject: Re: [AN1x] New owner


Hi Ray,

I've never studied the circuit in the AN1x, but the most likely answer is
yes, it uses battery power when plugged in and powered off.  Usually, there
is a little circuit to keep the memory alive that basically says, "If I
don't see some voltage here, I'm going to take some from the battery."  A
smarter way would be to take some from the AC adapter and THEN the battery,
but it costs more money to do it that way, so most manufacturers do it the
simple way.

Regards,

-BW

--
Bruce Wahler
Ashby SolutionsT   http://music.ashbysolutions.com
978.386.7389  voice/fax
bruce@...

At 02:49 AM 3/2/2003 +0300, you wrote:
>What about the state when the synth is "Off" but connected to power... ?
>Does it usually use the battery at this moment ?
>
>Ray.
>
>
>> FWIW, backup batteries are typically good for about 5-8 years, depending
>on playing frequency (the less the synth is powered on, the more the
battery
>is drained), the storage temperature, and other factors.  If the AN1x is
>five or more years old -- and it probably is -- then replacing the battery
>is not unexpected.  I do think that the dealer should have let you know
that
>this was the case, but I don't think it's worth cancelling the sale or
>anything.  Almost any AN1x purchased today could be a candidate for battery
>replacement within a few months.
>>
>> Replacing the battery is a very simple task for a repair tech to perform.
>It shouldn't cost more than an hour of repair time, plus the cost of the
>battery ($3-5US).
>
>
>
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