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/diy/ - Do It Yourself

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>> No.2405192 [View]
File: 782 KB, 2470x1520, IMAG1706_1.jpg [View same] [iqdb] [saucenao] [google]
2405192

My amp doesn't work. I poked many points along the audio signal path, and at least the passive components seem fine. I measured the op amp rails and found that nothing was going there. I measured the rails of the power amp though and a nice +/-15 V was present, and poked the inputs and it was indeed working, although maybe a little too soft? It's "only" 8 Watts or so but I remember it being really loud (last time using it was maybe two or three years ago). Pic related is my crude trace of the power section and other stuff. Any ideas?
As a side note, I applied some of the modifications you suggested and took come polar caps out. I bridged the traces, of course.

>> No.2401536 [View]
File: 782 KB, 2470x1520, IMAG1706_1.jpg [View same] [iqdb] [saucenao] [google]
2401536

>>2400805
Traced the power section today... maybe more than that.
The internet says that that particular speaker amp IC has been discontinued.

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