BiAmp 24 series mixer - trying to put together a connector cable from PS24/28 power supply to 24 channel mixer. I have pinout info on power supply end but not mixer end. Anyone have schematic info?

https://www.manualslib.com/manual/940051/Biamp-24-Series.html

How PC Fans Work - PCB Heaven

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Mar 29, 2010 - The connector of a 2-wire fan has a red and a black cable. ... The firsttwo wires are the power supply of the fan. ... This fan is designed to be controlled with a PWM signal and .... I have a four-wire (red black yellow blue) 12v fan out of an old .... My case has a number of 2 pin outputs for multiple case fans, ...

Motherboard Power Connectors ' PC Repair and ... - InformIT

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InformITFeb 28, 2003 - Table 3.3 ATX Main Power Supply Connector Pinout (Wire Side View) .... The auxiliary connector has no +12v leads at all, so that is no help. Pulling up to ...Pin. Signal. Color. Yellow. +12V. 3. 1. Gnd. Black. Yellow. +12V. 4. 2.

ATX 24 pin power supply connector pinout diagram ...

pinouts.ru/Power/atx_v2_pinout.shtml

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Jan 28, 2014 - Pinout of ATX (ATX12V) 24 pin power supply connector and layout of ... and later (ATX12V 2) is common ATX standard, 24 pin connector. ... Power Ok is a status signal generated by the power supply to notify ... 10, 12V, Yellow, +12 VDC ... 18 AWG is recommended for all wires except pin 11, which should ...

ATX power supply connector pinout diagram @ pino

First thing is to check your grounds and cables. The next thing is to put a different component on it and see if you still get the hiss. If both of these check out then you can start checking into the mixer itself. The channels do go bad.

check the probes,

follow this instructions and fix it. God bless you
Instructions

1. • 1
     Plug one end of a shielded input cable into the mixer's main output, and the other end into the crossover's input. The cable connectors will be dictated by your particular mixer and crossover, and will be either standard 1/4" or 3-pin XLR connectors. Consult the owner's manual of all components for specific details and recommendations.
     
     
   • 2
     Plug another shielded input cable into the crossover "high" frequency output, and the other into the crossover's "low" frequency output.
     
     
   • 3
     Plug the cable coming from the crossover "high" output into the channel one input on the stereo power amp, and the cable from the crossover "low" output into the channel two input of the power amplifier.
     
     
   • 4
     Plug one end of the unshielded speaker cable into the power amp channel one speaker output, and the other end into the horn tweeter.
     
     
   • 5
     Plug one end of the second unshielded speaker cable into the power amp channel two speaker output, and the other end into the woofer. The connections are now complete.
     
     

The two input jacks are parallel connected, to allow you to chain extra speakers together. There is no facility on this model to bypass the crossover and bi-amplify horn and driver separately. Nor should you need to. Just make sure you use a power amp rated for at least 400 watts per channel at 8 ohms.

MAKE SURE the cables you plug into 1/4 inch mains are TRS plugs, and not mono cables (TS). The main output 1/4 inch jacks are TRS balanced outputs and if you plug mono (TS) cables that shorts out the ring connector reducing the power by 6 Db. USE ONLY TRS balanced cables for interconnects !!!! Also read my tip on Fixya regarding PMP mixers. If you use 1/4 inch SPEAKER cables or adapters, if you short the SLEEVE of channel A output to ground you can pop the channel A amp. The TIP of channel B is the hot BUT the SLEEVE of channel A is the HOT. The ttip I posted explains why this is and it isn't mention in the Behringer documentation.

Check the label on the power supply for the current rating on 12 volts.
The +12 volt is the yellow colored wire and the black is the ground.
To turn on the switch mode power supply connect pin 14 (for a 20pin connector) or pin 18 (for a 24pin connector) to ground.
You can use a switch so you can turn the power supply ON and OFF.

Please click on this link for diagrams of the 20 and 24 connector pinouts :-
http://pinouts.ru/Power/atxpower_pinout.shtml
http://pinouts.ru/Power/atx_v2_pinout.shtml

It was the 1996 to 2000 time frame, that Dell was proprietary with the 20-pin ATX main power cable, and the matching connector on the mobo. (MOtherBOard).

Standard 20-pin ATX main power cable, and it's corresponding connector should work, then add the 4 power wires that are missing, in a separate connector.

To expound:

View this standard 20-pin ATX main power cable, and it's respective connector,

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain20

The power wires should be in the same place as your P3 units.

(Match the color codes.
Use the lock tab on the 20-pin ATX main power cable connector, to base where the pins are.

Pins 1 though 20. Match the color code of the wires to the pins, and use the chart to compare)

Here is a view of a standard 24-pin ATX main power cable, and it's respective connector, so you can see what power wires are missing, from the 20-pin ATX main power cable connector, that are present in the 24-pin ATX main power cable connector.

http://www.playtool.com/pages/psuconnectors/connectors.html#atxmain24

Note the missing power wires, and what pins they line up with.

The P4, or also stated as the 4-pin ATX +12 Volt power cable, uses two Yellow (12 Volt) wires, and two Black wires, (Ground)

http://www.playtool.com/pages/psuconnectors/connectors.html#atx12v4

Since you don't have the male connector, be sure to orient in your mind where the Yellow (12 Volt) wires go, and the Black (Ground) wires go, by looking at the lock tab on the side of the female connector, on the motherboard, and comparing it to the photo.

Transfer this info, to the P4 connector you are going to make.

Where to get the power wires you need? Connect to any extra 4-pin Peripheral power cable wires, or splice off of ones that are in use, is one suggestion.

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

The links given are near the middle of the page. Scroll back to the top. Left-click on any power cable connector, that you wish more information on.

More info,

http://en.wikipedia.org/wiki/Computer_power_supply

Scroll to the bottom of the page, and look at the chart under the heading -

24-pin ATX12V 2.x power supply connector
(20-pin omits the last four: 11, 12, 23, and 24)

One more link,

http://www.smpspowersupply.com/connectors-pinouts.html

Lastly Dell Support > Optiplex GX260 > Service Manual,

http://support.dell.com/support/edocs/systems/opgx260/en/sm/index.htm

Just in case it's of any use.

Have questions regarding what I have stated, or need more clarification of anything I have stated, simply post in a Comment.

The 20 pin connector is a reduced 24-pin connector, omitting pins 11, 12, 23 and 24. (as though they were just sliced off the end of the connector)

There's a good diagram of a 24-pin connector on wikipedia:

http://en.wikipedia.org/wiki/Atx#Power_supply