Date   : Thu, 02 Jun 2005 20:34:48 +0100
From   : Ian K <BBCmail@...>
Subject: Re: Slightly off-topic ... How do I replace an A3000 CMOS battery?

In article <2EC6B2F4B81B41A19CE7B7F5DEA195B.MAI@...>,
   BeebMaster <beebmaster@...> wrote:
> As I remember, the A3000 was the last ever "BBC Micro" so it is very
> fitting to mention it on here!

This would be best posted on comp.sys.acorn.hardware

> Best wishes,


> Ian

> ----- Original Message ----- 
> From: Richard Hobbis To: 
> bbc-micro@... 
> Sent: Mon, 30 May 2005 19:25:21 +1200 Subject:
> [BBC-Micro] Slightly off-topic ... How do I replace an A3000 CMOS
> battery?

> I've just acquired an old Arc A3000 and need to replace the CMOS backup 
> battery.

> http://www.minormania.com/stuff/a3000_cmos.jpg


The PCB looks very corroded. Does this still work at all?

> I think the battery is soldered in place, but which bit?
> Is it the two dimples on top or does the whole 'button' plus the two 
> contacts come off?
> Is it just a matter of melting the solder in the dimples for instance?
> Do I need to solder in the new one?

The connections on the battery are welded on you will have to unsolder it
from the board.

You can email me if you need some more help.

Regards
Ian K