OK - I know what the problem is for the stuck voice. The difficulty is fixing it. :-)
If I take voice card M4 out of the rack and move it around, the voice will either be stuck on or play normally. So, I believe one wire in that part of the harness has a break in it.
Anyone want to help guess which M card connection will create a "stuck on" voice if it is broken?
I can do this 2 ways - collect a probable list of wires and unsolder one at a time from a working card until I duplicate the problem or I can untie that part of the harness and pull/shake each wire...
Once this problem is solved I think the only thing left to do is a calibration.
--- In yamahacs80@yahoogroups.com, Csaba Zvekan <czvekan@...> wrote:
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> Great ! Keep up the good work . Remember the more you 'll replace the better it'll sound . Continue replacing 4000- CMOS chips . Now it would be a great to replace the chips on the SH board. See if get that stuck note checked of your list ;) .
> Is it it always one note from the 8 you press ?
>
>
> On Apr 21, 2010, at 12:11 AM, tmoravan wrote:
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> > Well, I have sound again. Now back to the 'stuck on' note and another with the wrong pitch. I replaced the two 4558's and the 2 4069's on the KAS and now the YM26600 and YM26700 is behaving better. I am going to replace the 4016's and 4050's (already did the 4011's) on the KAS board...