Скачать или смотреть bose wave problem - sometimes sound - no sound - loud speaker popping and crackle - AWRCC1

Replacing the TDA7376B did not resolve the issue.

The faulty unit produces loud intermittent pops and crackles. Sometimes there is speaker audio output (FM/AM, CD etc.), sometimes there isn't. Gently messing and wiggling wires, connectors or heatsink has no effect in forcing the problem. Have not checked 3.5mm OUT yet. Visual checks indicate no blown caps, there appear to be no speaker wire faults and no faulty power chord.

I have managed to find the large troubleshooting guide including lots of information and diagrams. Unfortunately it discusses the mk1, mk2 and mk3 in one document and not much can be found one the mk1 in terms of troubleshooting this particular issue.

Highlights
00:13 - crackle
00:18 - pop
00:20 - pop
00:26 - crackle
00:28 - small pop
00:40 - sound finally slowly fading in
00:58 - sound gone again
01:02 - last loud pops and crackles