I've been using it for the last week, get home, press the power button, think I saw a flash and stuck in protection.
DC measured before the relay at tp0 is 29v per channel and all the voltages are messed up. I'm thinking ground.............to be continued.
I noticed it also powers the AMP board as well. So- assume 70v is where it's supposed to be and i'm sitting 10v higher. This is an unregulated PS according to the schematic, is close to 80v ok?
Just my opinion but from what I've seen the C-XX/M-XX are some of Yamaha's worst; mass produced and chalk full of bad solder joints. Shame on Yamaha when it comes to these. :thumbsdn:
There, I said it.
I wonder if it's something to do with the style of transistor? I had an A-1000 that I believe had the same type - and it failed in an odd way too that was hard to find - I ended up putting in all new drivers and outputs. I think leaky outputs was the problem.
If I can't fix it with what I just ordered it's getting the baseball bat treatment, there, I said it.