Search found 5 matches

by nooel
Sun Mar 06, 2016 7:10 pm
Forum: HELP!
Topic: Yamaha CS-50 not playing notes
Replies: 18
Views: 12365

Re: Yamaha CS-50 not playing notes

They were all working when you first got the machine? That's great news, it likely means heat is the culprit. Could very likely be a cracked trace like mine. Let me know if you need any further info. When mine went down, I got copies of the service manual and schematic (for the CS-50, which is ident...
by nooel
Wed Mar 02, 2016 4:20 pm
Forum: HELP!
Topic: Yamaha CS-50 not playing notes
Replies: 18
Views: 12365

Re: Yamaha CS-50 not playing notes

m_P- I was able to fix mine. It ended up being a cracked trace in the PSU, shutting down the whole party. I do remember mine being a big scare because the proprietary chips are so expensive. However, I think the chips are generally very robust and it is hopefully not the issue. If it is, there may d...
by nooel
Sun Dec 28, 2014 3:45 am
Forum: HELP!
Topic: Yamaha CS-50 not playing notes
Replies: 18
Views: 12365

Re: Yamaha CS-50 not playing notes

First of all, just wanted to say thanks to everyone for taking the time to add their input. 0V on the TU input on the KAS board (that sets voltages for the octave and note ladders), you can guess where this one is heading… Got 6 mV on the + 15V rails, -15V was bad too. With both fuses intact I figur...
by nooel
Thu Dec 25, 2014 8:47 pm
Forum: HELP!
Topic: Yamaha CS-50 not playing notes
Replies: 18
Views: 12365

Re: Yamaha CS-50 not playing notes

Thanks for your input guys. Does this sound like a dead YM26700, dead CMOS chips, or it's hard to say one way or another? I do intend on following both of those pieces of advice, but I think regarding the PayPal claim, I might see of I can settle on a cheaper price, since I do obviously want one of ...
by nooel
Tue Dec 23, 2014 10:08 pm
Forum: HELP!
Topic: Yamaha CS-50 not playing notes
Replies: 18
Views: 12365

Yamaha CS-50 not playing notes

Hi all- This is my first post. I just received a Yamaha CS-50 yesterday in the mail that I paid $1350 for. After setting it up, I plugged it in and it played fine for about 10-20 minutes, before not sounding any notes. Does anyone know what the problem might be? I've gathered that it is the KAS boar...