SWR Mo' Bass Amplifier Repair

Digging in to this SWR Mo' Bass. It is an old bass guitar amplifier that I have owned for a long time. I hope to get it working again. Follow along, looking at schematics, probing the circuit, replacing an IC.
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/ thaddeusbartholemeu
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[@Discretesignals]

Great job on that repair! I wonder what would happen if you laid a known good op amp on top of the suspected bad one for troubleshooting?

[@paggre]

Hmm. Do you mean physically on top and try to solder it down? Interesting. Some of the amps might still be working and then you would be doubling the load on the input.

[@Discretesignals]

@@paggre wonder if you lay the ic on top of the suspect one so the pins are touching without soldering? If the bad chip is holding the output low, it might not work though. If you see a signal on the output, that would tell you the ic has power and ground and you're looking at a bad chip.

[@paggre]

@@Discretesignals Definitely interesting. That's worth a try.

[@Discretesignals]

@@paggre you could some how breadboard a circuit with that bad op amp to test that theory. That way if magic smoke does come out it's not a major loss.

[@paggre]

@@Discretesignals right. Can't let out the magic smoke.

[@LuckyDucky-Darling]

Someone really cool must have filmed that bass content

[@paggre]

One of the coolest!!!