Vintage Synth Repair

Hi,

thanks for advice, but I was not talking about inverter transformer  
Sumida S147948 making high voltage for backlight foil. That one is  
probably OK, I can check it after repair of +5 V section in PSU.

That M5291P IC is responsible for regulating +5 V.

Daniel Forro


On Apr 1, 2011, at 6:17 AM, baumont987 wrote:

>
> HI,
> I  replaced some times ago my display on my K5000W because of the  
> high-pitch tone coming from the DC/DC converter.
> If you replace the display with a led backlight (like this one:  
> http://www.zinguy.com/lcdpage.htm), you don't need the DC/DC  
> converter anymore ; the 5V DC output from the power supply will  
> suffice.
> I remember that my DC/DC converter was a SUMIDA one, but I don't  
> remember the reference.
>
> Maybe you'll find detailed information on the K5000 group:
> http://launch.groups.yahoo.com/group/K5000/
>
> /Greg
>