Gorges/no sound or speech?

br549autosales

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I just got a Gorgar that has a new rottendog CPU in it and everything works perfect except there is no sound. All connectors are hooked up, ribbon cable is fine and when I press the test switch on the sound board, I get nothing. Are the dip switcheson the rottendog board supposed to be set a certain way for sound?
 
The sound board is it's own stand-alone computer, and should provide sound regardless when the test button is pressed. If you get no sounds/speech, the issues are going to be on that sound board, and unrelated to the Rottendog board.

A few quick things to check - verify all voltages are present on the sound board at the test points, since it creates it's own voltages on the board. Try jumpering the W1 jumper, and disconnecting the cable to the speech board - if you then get normal sounds, suspect the issue as likely with the speech board or cable. Remember to remove the W1 jumper when reconnecting the speech board. Verify whether you at least get a hum from the speaker with the volume cranked; that tells you the audio amp is functional at least.

See also: http://www.pinwiki.com/wiki/index.php?title=Williams_System_3_-_7#Sound_.2F_Speech_Board_Issues
 
When you say the W1 jumper, is that one of those that have the small plastic jumper on the main board?
 
Can you tell me how to measure for the proper voltage on the sound board with my multimeter? If for some reason the voltage is not there or not correct, can i get a power supply for the sound board and if so, who has them?
 
Set your meter for measuring DC voltage. See attached image (or previous link) for locations of the test points.

Black lead on GND, red lead on the +5, +12, or -12 test points.

Make sure both fuses are good, make sure the fuse holders aren't fatigued and are making a firm connection.

There is no stand-alone power supply used - the circuitry providing the above voltages is built into the sound board. Once you know what voltages you do/don't have, you'll know whether it's involved in your issues, or if there is something else (IE a bad audio amplifier).

The pinwiki link goes over this; if you're not comfortable proceeding once you check the voltages, at least you can send the board off for repair with some knowledge of the likely issues.
 

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Ok, I'm getting 10.75v on test point 1 and -13.74v on test point 2 and 5v on test point 4. Is my issue with the actual sound board itself?

Thanks
 
the +12 and -12 are unregulated, and are in the ballpark so sound ok. If your 5v is spot-on otherwise, it sounds like the issues are not power-related, and if pressing the test switch on the sound board doesn't provide any sound effects or speech, the issues are most likely isolated to the sound board itself assuming you have the cables coming into the board properly connected.
 
I just repaired a few boards with similar issues just installing new caps... great plains has kits for them I believe and both worked after a cap kit, FWIW>. If you have speaker hum your amplifier is likely ok,
 
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