Fatality83
Noob
I bought a working mk pcb and soundboard and planned on installing it in my dedicated mk2 cabinet. It didn't come with any of the wiring harnesses so I used the wiring diagram in the mk users guide and a wiring diagram that I found online and wired up my own harness. This is the wiring diagram I found online and wired everything up according to this. http://forums.arcade-museum.com/showthread.php?t=134859 I wired the speaker positive to the speaker positive on the sound board, wired the speaker negative on the pcb to the speaker negative on the soundboard and so on. I did every connection like this except I obviously left the spot that didn't have a pin blank and also there was a plug labeled n/c but it had a pin there. I also left the n/c blank. Everything else I wired up to match. There was two 12 volts wires so I guess it doesn't matter which 12 volts went to the other 12 volts. I got everything wired up and soldered on the back of the boards. I used the 20 pin ribbon cable from my mk2 cab and hooked that up to test it. I found a potentiometer that says B50K on the back. Now I assume the 50k means 50,000 ohms but I cannot be sure if that is what it means or not. It was my brothers and he passed away earlier this year so I have no way of knowing. I wired the b50k sound pot up in the correct location using pins 2 and four.
I hooked everything up. The game boots up great but I get no sound. I tried messing with the wiring, pushing on the roms to try and reseat them, turing the sound pot adjuster and changing the wiring around on the sound pot. Nothing seems to work. I don't even get a pop from the speakers. Also in order to enter the test menu, I have to hold down the test menu button. As soon as I release it, it goes back into the game. I am almost positive I wired everything up correctly. Only things I was not sure with is, should I connect a wire to the spot labled n/a on the pcb and sound board and does it matter which 12 volt wire goes where as there is two of them? Everything else should be ok. How would you go about testing this to find out what is wrong? Any ideas why you have to hold the test menu button in for it to stay at that menu? Thanks for any help you can give me. Also if by friday I don't have it figured out, I am going to try and just buy a wiring harness and ribbon cable and maybe sound pot and see if that works.
I hooked everything up. The game boots up great but I get no sound. I tried messing with the wiring, pushing on the roms to try and reseat them, turing the sound pot adjuster and changing the wiring around on the sound pot. Nothing seems to work. I don't even get a pop from the speakers. Also in order to enter the test menu, I have to hold down the test menu button. As soon as I release it, it goes back into the game. I am almost positive I wired everything up correctly. Only things I was not sure with is, should I connect a wire to the spot labled n/a on the pcb and sound board and does it matter which 12 volt wire goes where as there is two of them? Everything else should be ok. How would you go about testing this to find out what is wrong? Any ideas why you have to hold the test menu button in for it to stay at that menu? Thanks for any help you can give me. Also if by friday I don't have it figured out, I am going to try and just buy a wiring harness and ribbon cable and maybe sound pot and see if that works.
