CA-1000...Lots of Help...

[Roger Gorke]

After not doing "the noise" for a couple weeks, it started doing it again. It is only on start up and only in the first min or two after the relay clicks on. It is independent of function and is NOT volume dependent nor affected by auto muting switch, meaning it still does the sound if I turn the volume all the way off. It is in both L and R channels.

This thread sounds like it might be similar to my issue.

https://audiokarma.org/forums/index.php?threads/cr-820-scrunching-noise.993394/

 

[mbz]

Both channels affected points to a power supply issue however worthwhile to test if preamp or power amp issue, ie, set coupler switch to off and supply audio input (another preamp, iphone,,,at minimum volume) into Main-In. Noise still present? Likewise try
CA-1000 Pre-out into another power amp...

Did you try tapping the relay as mentioned in above link, stand amp on side.
Has the relay/psu board been recapped? Any transistors on this board replaced?

 

[Yamaha5000]

These are the emitter resistors.. .47Ω 5 watt
View attachment 2465371
Good thing there not rattlesnakes...
Both of those caps are due for replacement . Note the shrunken plastic sleeves..

mbz, avionic, ... Did you ever feel like your were spoon feeding in this thread?