Sanyo ICC-82D : usable without internal battery ?

[Mark]

Hello,
I'd like to seek advice from any Sanyo expert who may be around. I've put hands on a nice ICC-82D (2nd version) which is working. Its internal battery is dead, so I'd like to know if disconnecting it and running the machine on AC only would put the electronics at risk ?

Thanks to Katie Wasserman's site, I found the ICC-0081 schematics wiring. Both machines have many in common and even the first stage of the power supply is the same, but there's one exception : no AC/DC switch. (it totally isolates the battery from the electronics when in AC position)

I'll soon do some diagnostics on my machine because is seems that the transformer secondary (or the rectifier) dedicated to battery charging is dead. Anyway, any information is much welcome.

Thank you very much,
Marc

EDIT : argh, sorry ! I put it in the wrong category, should have been "Not remotely HP calculators". Is there a way to fix my mistake ?
EDIT 2 : many thanks to the administrators for having put my post at the right place :-)