68kMLA Classic Interface

This is a version of the 68kMLA forums for viewing on your favorite old mac. Visitors on modern platforms may prefer the main site.

Click here to select a new forum.

Need help on quadra 950 psu pinout

Posted by: soviet on 2015-09-28 14:36:32 This is my first post so i like to say hello to all 😀 . Also i got a quadra 950 motherboard (just the motherboard nothing else). The proble is i like to get it running so i tried to do a ATX to Quadra conversion using the pinout i find posted on this forum. http://www.xlr8yourmac.com/systems/MacinPC_ATX_case/pages/PC-MAC_PS_pinouts.htm Like that this pinout refers to quadra 950 but is wrong. The quadra psu connector is 24 pin and on the description the link show 22 pins. If someone is so nice to get me a good picture of the connector so i can figure out the voltage from the colors?. Or take a voltage meter and do a correct measurement i love to get my quadra mother to post. Thanks 🙂

Posted by: Macdrone on 2015-09-28 15:17:44 I just received a 950 gutted with only power supply and motherboard.  After I make last run to portland I can try and test it if you like?

Posted by: CC_333 on 2015-09-29 07:17:09 Does that gutted 950 have any bezels? c

Posted by: soviet on 2015-09-29 08:12:00 Thanks MacDrone that could be great so whe can get correct pinout for the quadra 950 psu 😀

Posted by: Macdrone on 2015-10-02 08:59:20 I will take a photo of the power supply is all you want is a pin out as the power supply is like half the weight of the machine.

Posted by: soviet on 2015-10-02 09:03:59 Yes Macdrone that could be great 😀

Posted by: Macdrone on 2015-10-02 09:08:42 Here it is, btw power cords for drives seem pretty standard.

Posted by: Macdrone on 2015-10-02 09:09:26 Is there any other pictures you need?

Posted by: soviet on 2015-10-03 09:55:05 Thanks mac drone that was what i need i try to figure the voltage from the quadra 840 pinout it have a cable coloring to voltage relation. If i get the quadra board working i will post the voltage pinout 😀

Posted by: soviet on 2015-10-03 18:47:02 Following this guide i used the color sheme http://www.xlr8yourmac.com/systems/MacinPC_ATX_case/pages/PC-MAC_PS_pinouts.htm so i connected all red wires to +5 all black to gnd blue -12 orange to +12 yellow to +5 TRKL (says must be to +5 to the mac to power on) On the atx side (green + gnd) to get the psu powering on Ok checked everything like 10 times .... Power on First the lm317 burned up so i replaced it Then i disconnected yellow +12, power on ....... C7 (is close to the vram memory slots) burned up smoke and all. Then i disconnected -12 ok now led power up and but have the wires (yellow and blue) disconnected habe to replace C7 The color coding indicated on the guide seem to be wrong, i don't know if you can use the voltage meter to test the wires voltages macdrone? after this i don't have much hope to get the quadra board powering on. 🙁

Posted by: GeekDot on 2018-08-16 09:01:19 Some years later... Just in case you're looking for help with your Quadras PSU... go over there - it has the correct pinouts, the ones from xlr8yourmac are wrong!:

1