Timber with no sound, already read past threads

MtZRcade

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Ok, first let me say that i have already searched the past post and read through every one of them.

I have a timber that i am working on. I hook it all up, and i get the typical "sound board interface error" I have had this on about every tapper/timber and root beer tapper that i have owned. But the game always plays the sound fine once the game boots up.

So this timber is just pissing me off, no matter what i try, i cant get the sound to work. Things that i have done

Games has a new arcadeshop power supply conversion kit, so all voltages are perfect

replaced the ribbon cables with known good ones

replaced the z80a's

game had a mcr3 dual amp boards with a conversion harness, replaced it with another mcr3 dual amp board.

removed the conversion harness and hooked up two different mcr2 power amps

replaced both speakers


So in other words, i have tried about everything. The board was tested in another cabinet and the board does have sound.

thanks
troy
 
Does the arcade shop switcher have the 12V Analog LED lit?? That is the voltage that the amplifier runs off of. The switching power supply makes +5V and 12V, but the adaptor makes the 12V analog (unregulated) voltage that the amplifier runs off of.Check the three pin connector on the power supply adaptor and make sure you have voltage at the amplifier. If that all looks good check the connector that runs the audio to the volume pot
-Mark
 
Did you check all the pins on the connectors? I had a similar deal and one of the pins backed out just enough to cause the problem. Volume pot?

If it works in a another cab, it has to be something dumb in this one.....
 
You said it works in another cab.....in the working cabinet, does it still give the sound interface error?

Edward
 
most timbers on a cold boot will say sound board board timeout, and then function normally. However, if it gives a sound board interface error, generally you won't get any sound.

Since his pcb has sound in another cabinet, its most likely something in the cabinet. The first place i'd check would be the wiring between the volume pot and the pcb and then the volume pot itself. If any of those wires are broken, you will get no sound at all.
 
Ok, first let me say that i have already searched the past post and read through every one of them.

I have a timber that i am working on. I hook it all up, and i get the typical "sound board interface error" I have had this on about every tapper/timber and root beer tapper that i have owned. But the game always plays the sound fine once the game boots up.

You get sound board interface error if the sound board Z80 doesn't boot up by the time the cpu board Z80 is looking for it... sometimes that means the reset circuit is slow, and the game will work find once it fully boots, and sometimes it means there's an actual problem on the sound board.
 
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