The Yamaha AN1x Synthesizer mailing list

Hi Ed,

>    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.

There are circuits that provide a trickle of current to the memory, not the battery  Lithium batteries like the one that is in the AN1x -- as opposed to the Lithium-ion batteries in laptops -- will EXPLODE if charged.  (I've seen one go off in a lab:  It tore the top of a PC off like a giant can opener!)  However, there are additional complexities (design and safety) to providing current to the memory using an external power supply, so many manufacturers don't bother.  I have no idea how the AN1x is set up, so the safer assumption is that it doesn't provide this feature.

Regards,

-BW

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