I want to use an old but working Astec AA20910 / IBM 37L0059 power supply as a DC power source for my RC battery charger that needs 12-18 VDC @ 20 - 25 Amps.

You can jumper on an ATX power supply by using a wire to connect pin 4 (green wire) to any of the grounds on the 20 pin ATX connector. The grounds are normally a black wire. You will need to put some sort of load on the power supply such as a hard drive to keep it running.

Sounds like your power supply unit (PSU) is broken, do you get any lights come on when you plug in the DC cable and try to switch on?

Pin Name Color Description
1 3.3V Orange +3.3 VDC
2 3.3V Orange +3.3 VDC
3 COM Black Ground
4 5V Red +5 VDC
5 COM Black Ground
6 5V Red +5 VDC
7 COM Black Ground
8 PWR_OK Gray Power Ok (is a status signal generated by the power supply to notify the computer that the DC operating voltages are within the ranges required for proper computer operation)
9 5VSB Purple +5 VDC Standby Voltage (max 10mA)
10 12V Yellow +12 VDC
11 3.3V Orange +3.3 VDC
12 -12V Blue -12 VDC
13 COM Black Ground
14 /PS_ON Green Power Supply On (active low). Short this pin to GND to switch power supply ON, disconnect from GND to switch OFF.
15 COM Black Ground
16 COM Black Ground
17 COM Black Ground
18 -5V White -5 VDC
19 5V Red +5 VDC
20 5V Red +5 VDC

/PSON activated by pressing and releasing the power button while the power supply is in standby mode. Activating /PSON connects the power supply's /PSON input to ground, thereby switching the power supply to full-on condition.
18 AWG is recommended for all wires except pin 11, which should be 22 AWG. For 300W configurations 16 AWG is recommended.
There are several ATX variants.
Hope this helps.
If this helps you resolve your problem, please
consider giving me a rating of 4.It will help me as well. Thank you.

possible that you need a lot more wattage try a heavy duty one

Hi! l have have the same problem whit the Asctec model AA23160 power supply.But l need to know how many time your power supply worked: How many time do you use it?
Thank's!

This is usually caused by an old or defective battery or possibly the power supply is a few volts too low to activate the charge indicator. It might be charging but not letting you know.
Try to run it off battery for a while (look at the battery life) and then plug it back to for a while then unplug it again to see if the battery life if higher than before.
To check the power supply you will need a volt meter that can read at least 20 vdc (most power supplies are 19 vdc). Put one lead of the meter on the inside of the plug that goes into the computer and the other pin on the outer silver part while the power supply is plugged into the wall outlet. You should read close to what the Output Voltage on the power supply says which should be on the sticker on the back or side of the black box part of the power supply.

145 Watt power supply with the old style AT motherboard power cable connectors. (2 Each)

http://www.playtool.com/pages/psuconnectors/connectors.html#oldpc

I just put Astec SA147-3506 in my browser search bar, and came up with a number of search hits. Prices ranged from $50 to $170!

And it's a 145 Watt power supply! Astec is a cheap quality power supply manufacturer, to boot!

You know, there is a way to use a newer reliable power supply, and the AT power supply motherboard connectors, off of the power supply you have.

It's not for the squeamish, but can be done.

The power wires are removed from the ATX power supply motherboard cable connector, of the new power supply, and inserted into the AT power supply connectors.
(ATX 12V power supply is the newer one. AT power wires removed from the P8, and P9 connectors of your old power supply)

Interested?

Hi JR,

You didn't specify AC or DC. That's ok, I'm having a two-fer-one special.

Doorbell transformers give back 24VAC

Two 12VDC batteries in series gives you 24VDC. Overkill?

Transformers from many HP printers ar between 20 to 30 VDC.

The source I use is GoodWill. In the electronics or computers section, they usually have a big box of them.

Hope this helps you out
Mike

Sorry about your SONY problems.
You may want to try another charger,
Your charger changes your input voltage from A/C 120V / 220V to a constant regulated 19.77 ? Volts DC. or direct currant.
If your charger is allowing to much A/C to pass to the Unit, the unit may charge OK but with sense the incoming and as a protection, will shut down the power source.
I would take the charger to a Radio Shack or maybe someone qualified to check it !
If the charger is fairly old and you live in a lightning area, this may be the case.
If your unit will run without the charger attached, Boot it up regularly ( not in safe mode ) and make sure the battery if not at fault.
If you have a battery check utility !
Hope this information has helped you with your problem.

John Ray
[email protected]

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The device runs on 5 VDC. There was an optional adapter available that used the keyboard output, that simply tapped the GND & +5 VDC. On the jack, the interior is +5, the outer contact is GND. The easiest way to power the device is to tap into a free line from your computer power supply. Alternatively, a transformer with 5 VDC 100 mA output should do the trick.