Need help on Outbound Notebook

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Joined: Sep 7 2004
Posts: 5

Hi all,

A friend of mine just gave me an outbound notebook with 3 dead batteries. Unfortunately, the AC adapter was missing. I was wondering if you would help me get this puppy going. I've performed a search on the web, but have not come up with very few answers. I also want to know if the thing works before joining the outbound support group for $25. Any answers to the below questions would be appreciated:

1) Do you know if I can use a radioshack multivolt adapter or should I get a charger for the batteries and use them? These batteries are 12 V, old, and may be discharged beyond reconditioning.

From this site, http://www.applefritter.com/node/view/2686 , G4from128k states that it is a 22 V adapter 1.27 amp with a (+) center pin. If I can't use radioshack, were can I find a -cheap- replacement?

2)Will the computer recharge the battery when hooked up to AC power or will the batteries need a separate outside charger?

3) Is 7.0 the latest system that can be installed? Are these machines 32 bit clean?

Once I get the computer up an going, I'm going to try to find out what kind of processor/RAM/HD it has and try to install the latest system that the computer will accept. Hopefully it has an 68030 inside Wink

Thanks in advance

Sunny
Laughing out loud

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eeun's picture
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Joined: Dec 19 2003
Posts: 1891
PC Power

If you want to just test the unit, then weigh your options for proper AC supplies, batteries, etc., you can cheat and pull the power off of a PC power supply.

AT-style supplies can provide 24V - close enough to 22 - using the +12V and -12V lines (as your send and return lines...no ground wire here!). Double check with a meter to make sure you've got positive on the tip.

I've used this method a number of times, most recently to check a Fujitsu laptop, which was using IIRC 22V (which is another option...you may be able to use a Fujitsu E-Series supply).

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Tom Owad's picture
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Joined: Dec 16 2003
Posts: 2460
Charging the batteries in an

Charging the batteries in an external charger will work fine.

The computer wil charge the batteries when hooked up.

Whether or not it's 32-bit clean would depend on which Mac's ROMs are in it. The ROMs are on a small removable card, so you could take it out and check.

It can run System 7.

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Joined: Sep 7 2004
Posts: 5
I've got a dead Pmac 7300 sit

I've got a dead Pmac 7300 sitting around. I'll check the output from the power supply with a voltmeter.

Let me get this straight, all I have to do is splice one of the 4 prong power cables (to an internal drive for instance) from an AT power supply into a coaxial nub that will fit into the AC adapter port? Sounds like fun.

Eudimorphodon's picture
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Joined: Dec 21 2003
Posts: 1204
Re: I've got a dead Pmac 7300 sit

drsunnyk wrote:

Let me get this straight, all I have to do is splice one of the 4 prong power cables (to an internal drive for instance) from an AT power supply into a coaxial nub that will fit into the AC adapter port? Sounds like fun.

No.

There's a -12 volt line on the motherboard connector of PC-AT power supplies. If you use that as the "ground" line, and one of the +12 volt lines as to "positive", the total "potential" running through the circuit is 24 volts.

I don't know off the top of my head if Mac power supplies have that -12 volt line available on the motherboard connector, but it will *not* be present on a drive plug. (Which only has +12, +5v, and ground.)

--Peace

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Joined: Sep 7 2004
Posts: 5
Thanks again

I almost screwed up. Que lastima Shock

I'll look around on the Pmac to see if I can find what you are talking about. I wonder in the power supply on my Gateway 2500 solo notebook will work. I'll check on that too.

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Joined: Sep 7 2004
Posts: 5
thanks for the info

Now I just have to find where I put all those old system floppy disks. Hope I haven't thrown them away. :?