How about replacing the IC11 TDA2002 audio amp? Thinking it works only until it warms up then cuts out.
Alternatively you could inject another sound source to see if it works past the 15 second mark.
(Topic ID: 286011)
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Quoted from SirTinlee:After initial power on, I can ground the sound pins (10J3, 2-5 and 7) and it will make the correct sounds, but only for about 30 seconds. It *feels* like there's something either not getting correct power, or failing. I'm at a loss which component to check next. I'm leaning towards the 6820 PIA, or the 1408 D/A converter.
Quoted from SirTinlee:G-P-E, schwaggs, thanks for the idea, but the amp is not failing. The test runs for hours. If the amp was failing, that would stop at some point.
Maybe you can clarify what you mean by it makes the correct sounds for 30 seconds. What specifically happens after 30 seconds? What sounds is it making after 30 seconds? I assumed you meant it goes silent after 30 seconds.
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