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Changing 4558 IC on the PSU cured it again...All the voltages are back - phew! I won?t turn it again until I find out what is killing my PSU. Could it be the BA board?

A little update: 1. Recapped the PSU. - still bad - showing 7,4V instead of 15V for example. 2. Changed the two 1ohm ceramic resistors - helped ! I could calibrate the PSU now. 3. Calibrated PSU -

Well, it got even better. I?ve tried to fond a possible short and the only board except of M boards I have removed was the BA board (4.0V adjustment). I've inspected it and it seemed fine. After I

The issue you're describing is rather strange. It only impacts master board I-4. But what is really weird is that it only happens when one of the last four preset selectors is pressed. The trigger

Thanks. Phil yamahacs80@...> wrote:

Which "resonator" is this?

Here is another vid I made the other day. This time the 'Resonator' is on my recently repaired and 'arpeggiating' Korg Polysix with the CS80 doing lead-line. Cheerz, Tom

Hi Phil, It is a: Freeform Analogue Technologies (FAT) THC-00 "Resinator" Cheers, Tom

Thanks Joachim. I have managed to make the adjustments on the KAS a little better (still few cents out tough..) Now I have finished the complete tuning procedure and it seems to be pretty neat. I

step 1 - ok 4,00V This is the expected voltage for C6. step 2 - 125,7mV instead 125,0mV potentiometer to the max This means that when you play C1, the pitch will be too high (roughly by 10

Thank you Joachim for the complete and patient answer! You?re always there for us. I am aware of all the steps but I never did the 7 (transposition gate zeroing). It seems that all my M boards are

Hi, 1. What does really the transposition gate zeroing do? It does precisely what its name says: it insures the voltage used to determine the frequency of the VCO is zero, or reasonably close to

Very nice. And what model & brand is that three band Resonator module ? Phil yamahacs80@...> wrote:

So I am chasing the dragon yet again... What I am after is this steady ultraslow sweep between the channels and some of them are banging to quickly. I have never adjusted transposition gate zeroing

thanks... I should fix my channel 1 / M1 voice card one of these days.... sigh ---- On Sat, 04 Feb 2017 16:29:31 -0600 noddyspuncture@... [yamahacs80] <yamahacs80@...> wrote

Hi folks, Here is one I made today. I put my CS80's string presets through a 3 band resonator. Hope you like...:) Cheers, Tom https://www.youtube.com/watch?v=xODWI13NzDY

Here is my latest...:) Cheerz, Tom The NICE's 'Country Pie'... played on Yamaha CS80... https://www.youtube.com/watch?v=ZAmpmCzIu58 https://www.youtube.com/watch?v=ZAmpmCzIu58 The

Whoa! That is incredible background info. So if we've never replaced those caps, would our CS-80s have these minerals of conflict? If so, it would be my only keyboard that has a scandalous reputation,

Speaking of replacing caps. For years, I’ve replaced tantalums whenever working on old gear because of their problems like exploding. There’s one-per-note on the TSB boards. I just read in

Hi Tom, Thanks for pointing these issues. You're right concerning the 100uF capacitors. There are 4 decoupling capacitors; two between ground and +15V, and two between ground and -15V. I changed the