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
Thanks in advance
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).
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.
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.
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.)
I almost screwed up. Que lastima :o
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.
Now I just have to find where I put all those old system floppy disks. Hope I haven't thrown them away. :?