Yamaha Reface CP Type Selector Rotary Switch Replacement

ID: 139523

Description: Yamaha has a hidden/secret piano sound that can...

Steps:

1. The Yamaha CP and rotary switch we will be replacing (red).
2. This process includes removing a mind-boggling 42 screws. Make sure you have the space to keep them all in order.

3. Flip the CP over and unscrew the 17 screws from the bottom. Keep track of which was where as some are longer than others.

4. Flip CP over and gently lift the front of the top cover.
5. Unscrew ground cable (red circle). You may need to balance the cover in the air for this one as the cable is a bit short.
6. Unplug cables (pink rectangle). I marked the bottom one with tape to not mix them up later.
7. Remove top from bottom half. Store bottom half till the end as we no longer need it.

8. Place top half knob side up and gently pull (with your fingers) the knobs and sliders off.
9. Set flip switches to the middle position and unscrew the nuts with pliers.

10. Flip top cover over and remove the metal bar holding the PCB down by removing 4 screws (red) and 2 hooks (orange).
11. Remove another 18 screws (red) to finally free the PCB from the case!

12. Remove PCB from top cover and tie the cables back to make room for soldering (pink).
13. Desolder the rotary switch (yellow) with the help of the desoldering pump. Or just chop off the switch with the flush pliers (like I did after struggiling with desoldering).
14. Be careful not to damage the tiny SMD capacitor C110 (like I did) or diodes D104/D105 as they are very close to the switch.
15. Rotary switch removed and scratches from the pliers on the top side of the PCB (green).

16. Place the new rotary switch with the Alps text/logo (green) upside-down compared to the text on the PCB (orange).
17. Solder the switch with ROHS compilant solder. Please forgive the shoddy work on the stabilizing legs and crushed C110 (it still works).
18. Time to start putting it back together!