Thank you for the explanation. I have a new potionciometer pitch bend 10Kohm, I will send it according to the Tyros4 manual and the part code, https://www.audio-service.com/asshop/shop.nsf/sts?open . The original part as I understand it, because the code is what it is.
I have measured with a tester the central position of the potionciometer (5,25Kohm), the tester is the cheapest, so I may be wrong.
I don't really understand what (linear) and (logarithmic) mean, I'm not an electrician but more of a musician.
Hi Rolandas,
Apparently there are still minor translation problems here...
With a
linear potentiometer (lin), the resistance changes evenly over the entire control path. Therefore, as I said, in the center position it has half of the total resistance.
With a
logarithmic potentiometer (log), the resistance initially increases more slowly at the beginning of the control range. In the center position the resistance is still much less than half of the total resistance. Towards the end of the control range, the resistance increases relatively quickly.
For the sake of completeness: There are also “negative-logarithmic” potentiometers. These work exactly the opposite way to normal ones ("postitive-logarithmic"). But "neg-log" potentiometers are relatively rare.
Did you order the potentiometer currently used in your Tyros4 from the German company “audio-service.com” (Audio-Service Schierbecker, Hamburg)? Then it should actually be the right one (10 kOhm linear, labelled either "10.0k" or "B 10.0k" or "10.0k B").
What is the exact label/code on the potentiometer? Does it have a manufacturer's name/logo?
You may want to consult an electronics technician to make sure it really is a 10k linear potentiometer.
If the problem persists, I'm afraid I won't be able to help you anymore. Try to find an experienced technician who is familiar with Yamaha keyboards and/or contact Yamaha support in your country.
Best regards,
Chris