Thank you David for your welcome!?
Actually what's really funny is that i started the project of completely restoring my CS80 after finding that site, from which i shared that link from... and readin your post and your last name, i just realized that it was you behind that same site! World is small among passionate people, isnt it? :-)
Thank you for those details concerning TR9 and TR14, hidden on the heatsink.I'm not sure i correctly identified them yet, but i will take the PSU off the unit this weekend (as soon as i find those jumpers for connecting 15/15S pins).
Actually, i realized that my middle-position 500mA fuse was blown, even though it looked perfectly clean; today i simply ran a continuity test with my DVM, and it failed.
My +8.5/-6.5v issue came right after my probe slipped and touched another pin around (giving me a constant sound from the headphones/speakers of the CS80 as a result), which led me to think i created a limited-time short somewhere, which then certainly blew the fuse.
But in case there's a short anywhere else (indeed, it recently happened that my BA board got damaged, after i tried to take it out but forgetting to powering off the unit, stupid me), maybe i should check some caps on other boards as you suggested.But how to do it without risking to damage the PSU in any way again, or maybe any other boards' components? Is this benchmark PSU you got the only way to go in such cases, or is there any other workaround? For example, is there a way to check some caps without running the power up? By using a signal generator maybe?
By the way…Would anybody could suggest me an appropriate oscilloscope to buy, for following yamaha tuning procedure? I only made DVM checking for now, and would love to go on further with an oscillo, is there a 'minimum model' to get? (20MHZ is enough? should i go for 100MHZ instead?).I was planning buyind a tektronix TDS 210/220 for ex.
And by the way David, thank you again for your site, such a great internet source for CS80 owners!!!
Greg
