Hello

> So, in order to solve the issue with the Portamento on VCO4, I have
> to take it and go to the electronic shop, to replace this chip which
> is located under the capacitors (extra work has to be done).

Some question come to my mind now (I might have asked them before):
How does the portamento for VCO4 behave if you put the Synth to Unisono
mode
Does the portamento happen also with switching the octave switch of VCO4
Does C411 look different from C311,C211,and C111
Can you measure the voltage on the KLM354 at Connector 12 pin4 and then
play octave jumps on the keyboard.
And then measure the voltage at the connection of R502 and IC10, while
making octave jumps.

My suspicion is that the previous owner modified the behaviour of VCO4
by intention. To my opinion this is confirmed by the fact, that the VCO4
was detuned to exactly 4 notes above (which can make sense for X-Mod
sounds). So maybe we should not look for a faulty part, but for signs of
modofications.

> Finally, I noticed that when I turn on my Monopoly, some times (not
> all, a random note is playing without any key pressure. I have to
> tell you that about 2 weeks ago, I opened the keyboard and replaced
> some rubbers with new ones and cleaned the others with a soft
> alcohol. Strange

This might happen, if the spring of a key is not right in place and the
key touches the button.


Florian