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| | |-+  sigma sg 150b double jackpot sound
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Author Topic: sigma sg 150b double jackpot sound  (Read 2435 times)
jash123
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« on: February 10, 2012, 03:59:56 PM »

When I run the test i stop on sound and it plays music how do I get it to play when its not in test mod if it can thanks jim


* IMG_20120210_125210.jpg (1172.31 KB, 2592x1944 - viewed 240 times.)
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stayouttadabunker
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« Reply #1 on: February 10, 2012, 07:07:26 PM »

The only settings on an Sigma150b are the volume settings for the game Volume, and door alarm.
So something is wrong beginning where the sound ROM chips are on the MPU board.
I photo a couple of pictures I hope will help but I'd like you to remove
the two sound ROMs to check for a folded-under eprom leg.
While you are able to perform the sound tests, for some reason it's not outputting the sounds during game mode.

For each sound that is generated, it needs an input from the microprocessor to command a read sound byte from the two ROMs to produce sound for an event.
If one of the eprom legs on that line are folded underneath the chip body, then it's being allowed to complete the command for the sound event.

Be very, very careful when re-inserting the eproms so you don't fold a leg underneath.
Use a magnifying glass if possible to make sure you see that each leg in firmly inserted into the chip sockets.

Here's some pictures you can look at and they can be opened in another webpage to be enlarge if needed...>>>


* Sigma150B Sound ROMs.jpg (1208.22 KB, 2576x1932 - viewed 251 times.)

* Speaker checking.png (32.38 KB, 306x437 - viewed 226 times.)
« Last Edit: February 10, 2012, 10:21:30 PM by stayouttadabunker » Logged
stayouttadabunker
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« Reply #2 on: February 10, 2012, 07:08:25 PM »

More sound stuff for your machine...>>>



* Sigma 150B Game Volume.png (263.28 KB, 2221x1161 - viewed 258 times.)

* Sigma 150B Volume Control on MPU.png (14.92 KB, 420x234 - viewed 218 times.)
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Mr. Dinoman
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« Reply #3 on: February 10, 2012, 09:12:44 PM »

Are you sure it is a 150b and not a 150plus?...Post photo's of your MPU board if not sure... Please Post Pictures
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jash123
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« Reply #4 on: February 10, 2012, 09:49:42 PM »

It dose have sound but it dose not play the music it


* IMG_20120210_183819.jpg (1301.84 KB, 2592x1944 - viewed 260 times.)
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