It had been more than 20 years since my wife bought this Yamaha Keyboard (DGX-500). Everything was working fine except floppy disk drive (FDD) is malfunction (basically not in used all these while). We are using USB-MIDI connection for data transfer.
Recently, it was noticed that several keys are not responding, initial thought it might be aging and going to the end of its life. However, after doing some searching online, it might be possible causing by dust between PCB and the keys, which is blocking its connectivity.
Photos:
- Yamaha DGX-500 Electric Keyboard
- Identify the malfunction keys
- Turn the keyboard upside down to start dismantling process
- Unscrew all the screws at the bottom housing (dotted circle indicates more screws underneath)
- Example of speaker compartment after dismantling the cover
- Dismantle the key part by part by unscrew the 4 screws at the top of the keys
- Comparison between before cleaning (left) and after cleaning (right) the dust layer
- Use the dry cloth or even toothbrush to help on the cleaning, with vacuum cleaner
Videos:
- Test all keys functionality before assembling back the complete set
Tools:
- Screwdriver, dry cloth, toothbrush, plier, vacuum cleaner
Costs:
- Do remove & clean the mesh net of the left & right speaker and its compartment.
- You will need a plier to twist it in order to remove it from the housing.
- After cleaning the dust layer (3mm to 5mm thickness), you will feel the sound volume is much better compared to before cleaning.
