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Yamaha CLP-645 - Cleaning Note Key Contacts

Introduzione

If your Yamaha piano has the apparently common problem that some keys sometimes sound as if they have been pressed with maximal force/speed even though they have been pressed normally, there might be dust particles between the silicone mats and the printed circuit board (PCB) contacts. This can be mitigated by disassembling the piano and cleaning all silicone mats and PCB contacts.

This guide is just an adaptation of the following comprehensive video instruction to the CLP-645: https://www.youtube.com/watch?v=LbRkqGUm...

Cosa ti serve

  1. Yamaha CLP-645 - Cleaning Note Key Contacts, Remove Top Cover: passo 1, immagine 1 di 2 Yamaha CLP-645 - Cleaning Note Key Contacts, Remove Top Cover: passo 1, immagine 2 di 2

    • Remove these three screws at the top of the back side.

    • Push the top cover to the front side. It is locked on the inside with a slide mechanism.

    • There is a cable connected to the top cover. Lift the cover carefully and disconnect the cable.

    Modifica

  2. Yamaha CLP-645 - Cleaning Note Key Contacts, Remove Key Cover: passo 2, immagine 1 di 2 Yamaha CLP-645 - Cleaning Note Key Contacts, Remove Key Cover: passo 2, immagine 2 di 2

    • Remove this clip on the covers rails.

    • Use the new opening on the cover rails to remove the back pins of the key cover. The pins at the front of the cover cannot be moved up to this point. Instead, tilt the cover slightly to remove them from the guide rails at the front (after removing the back side pins).

    Modifica

  3. Yamaha CLP-645 - Cleaning Note Key Contacts, Remove Decorative Key Cover (internal): passo 3, immagine 1 di 2 Yamaha CLP-645 - Cleaning Note Key Contacts, Remove Decorative Key Cover (internal): passo 3, immagine 2 di 2

    • The decorative key cover at the top of the keys needs to be removed.

    • Remove the screws at the metal connectors.

    • The two screws at the left and right side are slightly different (metal screws); The six screws in the wood are the same.

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  5. Yamaha CLP-645 - Cleaning Note Key Contacts, Remove the Computer Parts on the Sides: passo 4, immagine 1 di 2 Yamaha CLP-645 - Cleaning Note Key Contacts, Remove the Computer Parts on the Sides: passo 4, immagine 2 di 2

    • Remove the computer parts on the left and right of the key board. They are secured with one screw only.

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  6. Yamaha CLP-645 - Cleaning Note Key Contacts, Remove Keyboard: passo 5, immagine 1 di 3 Yamaha CLP-645 - Cleaning Note Key Contacts, Remove Keyboard: passo 5, immagine 2 di 3 Yamaha CLP-645 - Cleaning Note Key Contacts, Remove Keyboard: passo 5, immagine 3 di 3

    • Disconnect the cable between the keyboard assembly and the main PCB.

    • Remove the large screws and two small screws on the back side of the keyboard.

    • The keyboard is secured in a guide rail at the front. Push the entire keyboard assembly slightly to the back and take it out the top.

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  7. Yamaha CLP-645 - Cleaning Note Key Contacts, Prepare Keyboard Assembly: passo 6, immagine 1 di 3 Yamaha CLP-645 - Cleaning Note Key Contacts, Prepare Keyboard Assembly: passo 6, immagine 2 di 3 Yamaha CLP-645 - Cleaning Note Key Contacts, Prepare Keyboard Assembly: passo 6, immagine 3 di 3

    • Lay the keyboard assembly on its back. Now, all keys are pressed, which makes it more difficult to remove the PCBs with the silicone mats.

    • Disconnect the cable from the middle PCB.

    • Push up the metal levers to relax the keys and the silicone mats. You can use books or broom stick or similar.

    Modifica

  8. Yamaha CLP-645 - Cleaning Note Key Contacts, Remove Key Contact PCBs: passo 7, immagine 1 di 2 Yamaha CLP-645 - Cleaning Note Key Contacts, Remove Key Contact PCBs: passo 7, immagine 2 di 2

    • Remove the screws from the PCBs and flip over all three at once.

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  9. Yamaha CLP-645 - Cleaning Note Key Contacts, Clean and Reassemble: passo 8, immagine 1 di 1

    • Clean the inside of the silicone mats with contact spray, compressed air or similar. Make sure not to damage the black contacts on the silicone mats.

    • Placing the silicone mats in the keyboard assembly works nicely, if all keys are relaxed. Otherwise, the keys push up the silicone mats.

    • The silicone mats have a guide rail on one side that fits into the black plastic and small grooves on the other side. The grooves are matched by nubs on the plastic part.

    • The silicone mats on the left AND the right ends are different from the others. One of them has the same size as the others, but has different groove positions.

    Modifica
Conclusione

To reassemble your device, follow these instructions in reverse order.

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Scribble4025

Membro da: 10/05/25

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