Old Motifator threads are available in the Archive.
5pinDIN
![]() Total Posts: 11838
Joined 09-16-2010 status: Legend |
Welcome to the forum.
The voltage regulators don’t tend to fail.
The electrolytic caps previously mentioned are typically what needs to be replaced. It’s not necessary to order such parts from Yamaha. Your member profile doesn’t indicate your location, so making recommendations for parts suppliers is difficult. In the US, Mouser Electronics and DigiKey Electronics are usually good choices. |
m1muzik
Total Posts: 3
Joined 11-24-2018 status: Newcomer |
5pinDIN - Thanks for the fast reply! Yes, I am located in the United States. I’ll check those two places to order the rest of the capacitors that I need to replace. I have noticed on PSU board that there are darker lines coming from one of the regulators, I figured the regulator in that section would be burnt or needs changing. I’ll continue to replace the capacitors in my case and see it that resolves my power on errors. Thanks again! -M1muzik |
5pinDIN
![]() Total Posts: 11838
Joined 09-16-2010 status: Legend |
You’re welcome. Have you checked voltages to determine if the regulator is/isn’t functioning correctly? Sometimes bad caps can cause excessive dissipation in such a device, or heat sinking is insufficient due to a mounting issue. Typically Yamaha doesn’t manufacture the power supply, it’s purchased from another supplier. Therefore there’s usually no schematic or parts information for it in the SM. Yamaha provides a part number for the entire PSU. If you need to replace the regulator, what identification do you see on the part? |
m1muzik
Total Posts: 3
Joined 11-24-2018 status: Newcomer |
Hello, Sorry for the late reply, I had forgotten my password and tried several times to reset my password and finally I was able to login back. Thank God I had found my password written somewhere in my phone, the password reset on this forum doesn’t work. Here is a picture of the PSU board. The middle section looks alittle dark especially around the voltage regulator area. |