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<font face="Arial">Has the pitch bend been calibrated?<br>
There's a procedure in the service manual -- center the wheel,
hold down Record and press 3.<br>
This info is kept in RAM; any time memory is lost, it must be repeated.<br>
~GMM<br>
<br>
</font><br>
<div class="moz-cite-prefix">On 6/22/2016 1:08 PM, Florian Anwander
wrote:<br>
</div>
<blockquote cite="mid:576AF045.3080603@mnet-online.de" type="cite">Hello,
<br>
<br>
I recently had the P600 of a friend on the bench with a weird
behaviour of the pitch bender:
<br>
<br>
The bender does not bend down, and when it bends up, then at the
last 10% of the movement, the pitch jumps for about three or four
half notes. Until to that point the bender covers a range of
around two to three half notes.
<br>
<br>
The synth itself is tuned about three half notes to low. The
highest setting of the tune potentiometer is still a half note too
low.
<br>
<br>
The voltage at the input of the 4067 coming from the bender
changes continuously from 0V to ~ +5V. The 7805 regulator on the
panel board works fine
<br>
<br>
The potentiometer is ok (I interchanged the wires of the bender
and the mod wheel). The mod wheel and all other potentiometers
works fine.
<br>
<br>
I replaced the 4067 without a change.
<br>
<br>
I am now quite at the end of my ideas. The only assumption would
be that the complete A/D-D/A thing is wrong aligned in a funny
way, that it does not cause other problems but the all over
tuning.
<br>
<br>
<br>
Any hints where to look for?
<br>
<br>
<br>
Florian
<br>
<br>
PS: unfortunately the synth is back at my friend and it is quite
an effort for him to bring it in my house. So I don't want to
shoot in the mist the next time he is coming by.
<br>
</blockquote>
<br>
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