Need help with analog delay

[plasticanimal]

Hello everyone. My friend recently got rid of his old 4 channel Dj mixer. Before he threw it out he pulled the delay/echo board and gave it to me. He was thinking I might be able to make a pedal out of it somehow. It looks like a basic MN3008,MN3101 type analog. My problem is that I'm a bit of a noob when it comes to electronics. I can follow directions but tend to get lost easy otherwise. The delay has five wires attached but I don't know which is for what. I've tried it a couple different ways and got sound to pass though but can't seem to get it to delay.
Any ideas?
The wires are not original btw. I connected them as red +V, black GND, brown IN, and the others I don't know. Not sure if any of that is right though.

[jkokura]

Have you looked for a schematic for the unit you pulled it from yet? Perhaps contacting the company that built it in the first place might yield some good results.

In the least I'm sure someone here can talk you/guide you through tracing the circuit.

I've found that often using the data sheets of the IC's in question you can learn which is their output, input, power and ground pins. From there, you can often trace the output of the IC's to each other and eventually to a wire. it would be good to start at a wire, just pick a likely one, and then follow the signal to an IC. Look up the data sheet for that IC and figure out what pin it is. If it's a power pin you'll know you've found the power wire; if it's the ground pin, input pin, you get what I'm saying.

Jacob

[plasticanimal]

Yeah, looked for schematics but it's a very old Gemini 6200 probably from the mid 80's. All analog with VU meters. I felt pretty confident about the power, ground and input after following the traces and checking the pinouts. I just can't get it to delay the sound. I've been using 9V to power it. Should I increase power to something like 12-15V to match what you might find in a mixer. Also there are two more wires. So one would have to be output and the other would be power out maybe? I need to get a voltmeter I guess.
Man,I'm having fun and learning alot with this but I'd really like to see it work.   Maybe it's fried.