Hi folks,

Getting closer to really finish my Elektra, but now I have an issue with the sounds.

During a game most of the switches does the same sound effect, and many of them try to play a voice call, so during a game all you can hear is "you are.. you...you are entering...youyouyou"

Replaced the mpu with my fireball II, and sound works perfect... so sound board its ok imo.

Any clue about where should I start to look?

Thanks

Ive found 3 dark, nearly crispy resistors at R101,102,103, replaced them but all 3 tested ok.

Any ideas?

IMG_20171220_225151 (resized).jpg

Done! The PIA at U11 was bad.

The MPU does the 7 flashes so you may think PIAS are OK... Wrong!

Replacing the PIA SOLVED the problem, testing the bad PIA on another board reproduces the problem.

1513889036400-88324461 (resized).jpg

I've reading your post about your sound problems, sadly I cant help you much since I dont have a logic probe, Im Lucky to have other pins with same boards so I can test easily.

My MPU said with 7 flashes that PIAs were OK but I know the problem was at the MPU, cos replacing the board solved the problem.

Your situation is another, you dont have boards to swap and test, so you need to relay on individual components test.

Since your problem is not about playing the wrong sound, but playin the sound incorrectly, I believe the problem is at your Sound Board, since I don't think the MPU is related in any way in the process of reading and playing the sounds from the SB eproms.

Dude I know your pain hahahaha I would let you use my MPU and SB but we are too far, I hope you fix it soon, you are really working hard on that SB.