SP303 Potentiometer Replacement

[euphoricnoise]

Hi guys, my CTRL-3 Knob seems to not be working (similar to many people on this forum from what I've seen). I've tested the unit and the potentiometer seems to be faulty/defective (not sending correct voltages/data when turning the knob).

I have the schematic and found out that the potentiometer isn't sold anymore (I've checked mouser and digikey). The part number is RK09K113A 50KB(20MM). [50k ohm linear taper]. I've tried searching for something but I only get the 50KA potentiometer part online. If anyone has any knowledge on this, is there another potentiometer I could substitute in place of this part?

Thanks guys!

[KimBongIll]

Hey euphoricnoise,

I'm also having issues with my CTRL 3 knob and am looking for a replacement potentiometer. The best I found was this:

http://www.reichelt.de/6mm-Potis-mono/R ... ANGUAGE=EN

It's the same series so it should fit on the PCB. It has a different shaft though therefore the cap won't fit but I guess it's better than a non working knob.

Do you have the schematics in a digital format? If so could you pass me the file?

[euphoricnoise]

Just sent it to you! I guess I could cut off the extra length haha

[KimBongIll]

Thanks!

This could be another alternative:
http://www.mouser.de/ProductDetail/ALPS ... Iq9A%3D%3D

The shaft is 5mm shorter than the original.

[magicsean]

sorry to bother OP but if I may ask, would it be possible to upload or also pm me the service manual you have @euphoricnoise? Recently did a headphone jack fix but would be nice if anything else happened in the future..

[euphoricnoise]

Ey man! Sorry didn't see this sooner, will send!

[BruteCoan]

Ey man! Sorry didn't see this sooner, will send!

If you are d still online could I get a copy of the schematic and/or service manual for the 303 as well, or if anyone else have a copy?

I've resoldered and temporarily repaired the quad RCA jack because the pads broke loose from the circuit board. But now my rca output is only sending the left channel out.

[Sweat One]

Here it is...
viewtopic.php?f=1&t=24161

[BruteCoan]

Awesome. Ty kindly