This doesn't happen too often. I have these amps for repair (one is defective, the other is working but was sent in just in case I needed a comparison to a functioning unit). One amp is more expensive than my car.
Yea, that's an Alps Blue Velvet pot for the gain control.
So the trouble was that one channel wasn't working.
Found this little thing wedged between the legs of one output transistor.
Pulled the board out of the chassis and realized all screws and washers are stainless steel.
Checked the drivers and they're all good. The only casualties are two 4A fuses and one blown output transistor. Time to get replacements.
Even though the other output transistor is still working, I think I'll replace it as cheap insurance against failure down the road. Not sure if I'll have to do the same for the drivers as the output transistors, I can get the same Onsemi parts. The drivers are ISCsemi parts which I can't get locally. If I'm going to replace them, I intend to use exactly what was used and it will probably need bias readjustment once replaced.
Yea, that's an Alps Blue Velvet pot for the gain control.
So the trouble was that one channel wasn't working.
Found this little thing wedged between the legs of one output transistor.
Pulled the board out of the chassis and realized all screws and washers are stainless steel.
Checked the drivers and they're all good. The only casualties are two 4A fuses and one blown output transistor. Time to get replacements.
Even though the other output transistor is still working, I think I'll replace it as cheap insurance against failure down the road. Not sure if I'll have to do the same for the drivers as the output transistors, I can get the same Onsemi parts. The drivers are ISCsemi parts which I can't get locally. If I'm going to replace them, I intend to use exactly what was used and it will probably need bias readjustment once replaced.
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