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Tandon 386sx-16 TM7443, manual for jumpers

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First post, by nuno14272

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Hello everyone,

I've encountered this Tandon 386sx-16 model TM 7443, in a scrap yard.

It was complete, it starts, but as no battery..

Its a HUGE board.. the cpu comes in a separeted board.. fells like an upgrade board.

The board as several empty sockets and many jumpers.

In order to install a new battery i need to know, how much volts is it? Where is the conector, and what are the vcc and ground pins..

Does anyone have a manual for This computer?

This is the computer
https://computer-retro.de/Bilder/iMac/Tandon- … park-CA-USA.jpg

Thank you

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1| 386DX40
2| P200mmx, Voodoo 1
3| PIII-450, Voodoo 3 3000

Reply 1 of 2, by Horun

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There is a Youtube video break down of same computer, it had a 3 cell (4.5-4.8v) battery pack. The negative pin would be grounded so a DVM will find it (no Ohms to any good ground point),
the other pin would be positive. You can use 3 AA or AAA standard batteries. Did you comment about J12 ?

Hate posting a reply and then have to edit it because it made no sense 😁 First computer was an IBM 3270 workstation with CGA monitor. Stuff: https://archive.org/details/@horun

Reply 2 of 2, by nuno14272

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J12.. yes.. looks like it should.be the conector. Because This computer doesn't have onboard battery.. just external.. ehatching that vídeo..

J12 as 4 pin.. just.like.a "normal" external header for battery...

Theres another 2 pins just very, very close to J12..

So.. just to BE shure.. 3 pins are negative.. and One should not have conectivity to ground with the multímeter. Right?

1| 386DX40
2| P200mmx, Voodoo 1
3| PIII-450, Voodoo 3 3000

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