So the rails are +-30 vdc. Is that what you get on + & - terminals of C1, C2?
Warning to newbies, work only with one hand when checking with the power on. Use alligator clip to connect DVM negative to speaker return. >24 VDC across your heart can stop it. Wear no jewelry on hands or neck. 1 vdc @ 30 amps can burn your flesh to charcoal. Touch no metal with flesh until checked <1vdc and unit unplugged from AC.
Volume pots often wear out on old amps.
You can download service manual from eserviceinfo.com
Warning to newbies, work only with one hand when checking with the power on. Use alligator clip to connect DVM negative to speaker return. >24 VDC across your heart can stop it. Wear no jewelry on hands or neck. 1 vdc @ 30 amps can burn your flesh to charcoal. Touch no metal with flesh until checked <1vdc and unit unplugged from AC.
Volume pots often wear out on old amps.
You can download service manual from eserviceinfo.com
I just downloaded the service manual, C101 and C201 seem like a good place to start looking.
Use bipolar types only. They're overdue for replacement anyway.
What role does that cap play exactly?
Input blocking capacitor, just after the level control.
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