Centipede AR sound issue

7146aaron

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Jan 17, 2008
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Speedway, Indiana
I have a Centipede that works but the sound is just a horrible hum. The board is fine. I recapped the sound section on the AR and checked the diods and resistors on the AR. All fine. I am suspecting one or both of the transistors at Q5 and Q7. Am I thinking right?
 
Hum

Same hum. It just gets louder when the volumn is turned up. Oh, I have the 12 volts also. Same hum when using the test points on the AR.
 
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