[SPARCbook] Power problems

[Borgen_Gary]

I recently had a Series 2 battery re-celled.

The outside two terminals are +12V, the middle one is ground, and the other
two go to a circuit card.  The circuit card contains a portion of the
charging circuit and a temperature sensing circuit.

As a side note:  The pack can easily be re-celled. Just make sure when they
split the pack open that they do it on the side and not the middle, since
the circuit card is in the middle between the batteries.

There are two other things that can go wrong in the power system of the SB3
series.
1.  There is an IC that is used to measure all the DC-DC converter outputs.
2.  The LCD status display board also contains a small processor that looks
at the power supply measurement IC (1) and takes care of power cycling and
watch reset functions.

Are you getting any indications on the LCD status display when operating off
the external DC or battery?

----- Original Message ----- 
From: "sunder" <sunder at sunder.net>
To: "For owners of Tadpole/RDI's SPARCbook series of portable Sun-compatible
computer systems." <sparcbook at sunhelp.org>
Sent: Saturday, April 24, 2004 6:52 PM
Subject: Re: [SPARCbook] Power problems


> Liam wrote:
> >    Could it need 5v somewhere? There are 5 terminals on the battery, any
idea
> > what they are all for? Could I have my 12v in the wrong place?
>
> I remember that the extra leads were for a thermoresistor - to prevent
> overcharging the NiMH cells.
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