I think that's a tough sound board to work on or find as it was the only game that had that board. Might be a replacement now though as it's been a while.

I had missing music on a Mousin’ Around a few years ago and had 1 bad trace from 6821 chip to resistor network and one bad trace from resistor network to ribbon cable header.

Andrew

I had the exact same sound problem and the problem was on the CPU. Changing out the CPU restored the drawbridge sound and speech. Never went further than that.

Check resistor network (I think its SR8) I have had some sounds/speech not work due to a bad network.

Any update on this? I also have a Jokerz I bought about 2 years ago and it never has played any speech or special sounds. Just the music and normal beeps and boops. TheWiz if you want to compare notes and troubleshoot, let me know.

No updates? Anyone? I have a Jokerz with no music; speech only. I have borrowed a board from a friend's working Jokerz, and it works fine in my machine. * I swapped all of my socketed chips to the working board and they are all good.
* I installed a socket and a new 6264 memory chip; no change.
* New TD2003 amps installed; no change.
* I did the diode test on all of the ICs with the working board next to it as a reference. All checked out the same as the reference board.

Thoughts anyone??

Is there another board that can be used in place of this one? I have a spare, working D-11581. I'm assuming it can't be used or they would have installed it in the first place.

I can’t speak about speech - but I owned one of these things. No matter what I did - the music was glitchy, the alphanumeric was glitchy. No amount of replacing chips seemed to fix it. Sourcing 6809s are a PITA.

I have borrowed a working D-12338 sound board from a friend's Jokerz. It works fine when installed in my machine, both speech and sound. I have swapped all of the socketed ICs from my board into the working board and all performed as they should. I have now replaced all of the IC sockets and both oscillators (I know, shotgun approach) on my non-working board with no improvement. Short of replacing every IC on the board, I am out of bullets.

I should also mention that all of the caps are new and I have visually checked polarity several times. All header pins have been reflowed. There are no shorts between pins, except those per design.

How about the 55556 cvsd chip?

Pardon my ignorance, but where is that one located on the board?

I realized that it is on the MPU. I am assuming that it is OK since I have a working sound board, borrowed from a friend, that I installed and it worked fine in my machine. The problem appears to be with the sound board.