One step I haven't yet tried, in my attempts to further diagnose a one-channel in-op issue on a late '70's Yamaha CA-600 integrated amp, is to use a separate pre-amp and source and test ONLY the Yammy's power amp section. Has anyone attempted that on a Yamaha integrated amp of this vintage?
There's a "Coupler Switch" (see attached) for separating pre-amp and power sections on the rear panel. I've successully used it to de-couple pre and power sections and verified the symptom in not in the pre-amp section. (I.e., when a separete power amp was used in place of the Yamaha's power amp section no symptom was present.) I simply want to, as stated above, use a separate pre-amp and source and test ONLY the Yammy's power amp section. Yet I'm reluctant to attempt that without knowing if anything adverse might occur that's unrelated to whatever may be wrong with it.
If anyone has done this on a 1973-ish to 1976-ish CA- series of Yamaha Integrated Amp, let me know.
There's a "Coupler Switch" (see attached) for separating pre-amp and power sections on the rear panel. I've successully used it to de-couple pre and power sections and verified the symptom in not in the pre-amp section. (I.e., when a separete power amp was used in place of the Yamaha's power amp section no symptom was present.) I simply want to, as stated above, use a separate pre-amp and source and test ONLY the Yammy's power amp section. Yet I'm reluctant to attempt that without knowing if anything adverse might occur that's unrelated to whatever may be wrong with it.
If anyone has done this on a 1973-ish to 1976-ish CA- series of Yamaha Integrated Amp, let me know.
