Yamaha DGX-640
Released in 2008The DGX-640 is an 88-note portable digital piano with built-in speakers.

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We stock both NEW and USED parts; all used electronic parts are tested and guaranteed working.
This listing reflects our current inventory and is updated in real time. If a part is shown as Out of Stock, we typically don't know when or if we might have it again - but click on the part for more info, and then you will be able to sign up for an alert when we do have it available again. By including out of stock parts in our listings, we hope to offer customers a more complete and useful resource.
We cannot diagnose repair issues by phone or email. For technical questions, we suggest posting on our Forums, where our techs - as well as other users - can offer help.

Replacement Keys

Button set, 12-button keypad
$19.95 (Part #6806)
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$19.95 (Part #6806)

Button set, 2-buttons
For Exit, Function
$6.95 (Part #6805)
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For Exit, Function
$6.95 (Part #6805)

Button set, 2-buttons
For File Control, Execute
$6.95 (Part #6802)
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For File Control, Execute
$6.95 (Part #6802)

Button set, 2-buttons
$6.95 (Part #6809)
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$6.95 (Part #6809)

Button set, 3-buttons
For Split, Dual, Harmony
$7.95 (Part #6804)
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For Split, Dual, Harmony
$7.95 (Part #6804)

Button set, 3-buttons, gray
For Waiting, Your Tempo, Minus One
$9.95 (Part #6803)
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For Waiting, Your Tempo, Minus One
$9.95 (Part #6803)

Button set, 4-buttons, gray
For Score, Lyrics
$9.95 (Part #6807)
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For Score, Lyrics
$9.95 (Part #6807)

Button set, 5-buttons
For Port. Grand, Style, Song, Voice, Music Database
$16.95 (Part #6798)
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For Port. Grand, Style, Song, Voice, Music Database
$16.95 (Part #6798)

Button set, 5-buttons, dark gray
For Regist Memory, Bank 1-4
$16.95 (Part #6799)
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For Regist Memory, Bank 1-4
$16.95 (Part #6799)

Button set, 6-buttons
For R/1, L/2 3, 4, 5, A
$17.95 (Part #6801)
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For R/1, L/2 3, 4, 5, A
$17.95 (Part #6801)

Button set, 8-buttons, dark gray
$16.95 (Part #6797)
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$16.95 (Part #6797)

Button, white, Yamaha
For Demo/BGM, Rec
$3.95 (Part #6808)
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For Demo/BGM, Rec
$3.95 (Part #6808)

Contact strip, 12-note, Yamaha
$14.95 (Part #CS3468)
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$14.95 (Part #CS3468)

Contact strip, 4-note
$12.95 (Part #CS3467)
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$12.95 (Part #CS3467)

Corner panel, left
$21.95 (Part #6783)
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$21.95 (Part #6783)

Corner panel, right
$21.95 (Part #6784)
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$21.95 (Part #6784)

Digital jack board, Yamaha
$24.95 (Part #6816)
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$24.95 (Part #6816)

Display, LCD, Yamaha
$159.95 (Part #3653)
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$159.95 (Part #3653)

Encoder
$11.95 (Part #3465)
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$11.95 (Part #3465)

Encoder board, Yamaha
$16.95 (Part #10687)
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$16.95 (Part #10687)

Encoder knob, Yamaha
$7.95 (Part #6800)
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$7.95 (Part #6800)

Hammer weight, black key #1, Yamaha
$6.95 (Part #6790)
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$6.95 (Part #6790)

Hammer weight, black key #2, Yamaha
$6.95 (Part #6791)
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$6.95 (Part #6791)

Hammer weight, black key #3, Yamaha
$6.95 (Part #6792)
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$6.95 (Part #6792)

Hammer weight, black key #4, Yamaha
$6.95 (Part #6793)
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$6.95 (Part #6793)

Hammer weight, white key #1, Yamaha
$6.95 (Part #6786)
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$6.95 (Part #6786)

Hammer weight, white key #2, Yamaha
$6.95 (Part #6787)
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$6.95 (Part #6787)

Hammer weight, white key #3, Yamaha
$6.95 (Part #6788)
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$6.95 (Part #6788)

Hammer weight, white key #4, Yamaha
$6.95 (Part #6789)
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$6.95 (Part #6789)

IC, LA4625 audio amplifier
$12.95 (Part #6868)
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$12.95 (Part #6868)

Key actuator pad, rubber, Yamaha
$2.95 (Part #1268)
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$2.95 (Part #1268)

Key actuator pad, rubber, Yamaha
$2.95 (Part #11388)
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$2.95 (Part #11388)

Key contact board, 24-note (High), Yamaha
$34.95 (Part #2206)
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$34.95 (Part #2206)

Key contact board, 28-note (Low), Yamaha
$34.95 (Part #2205)
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$34.95 (Part #2205)

Key contact board, 36-note (Mid), Yamaha
$37.95 (Part #2204)
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$37.95 (Part #2204)

Keybed cushion, 88-note
(Hammers strike against this)
$24.95 (Part #5284)
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(Hammers strike against this)
$24.95 (Part #5284)

Keybed cushion, 88-note
$7.95 (Part #1430)
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$7.95 (Part #1430)

Keybed cushion, Yamaha
(Hammers rest against this)
$26.95 (Part #5297)
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(Hammers rest against this)
$26.95 (Part #5297)

Keybed, Yamaha
$379.95 (Part #10674)
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$379.95 (Part #10674)

Knob, Yamaha
For Volume
$5.95 (Part #4314)
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For Volume
$5.95 (Part #4314)

Main board, Yamaha DGX-640
$289.95 (Part #6796)
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$289.95 (Part #6796)

Music rest, Yamaha
$29.95 (Part #2065)
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$29.95 (Part #2065)

Panel board, left, Yamaha
$29.95 (Part #10562)
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$29.95 (Part #10562)

Panel board, left, Yamaha DGX-640
$29.95 (Part #6814)
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$29.95 (Part #6814)

Panel board, right, Yamaha DGX-640
$24.95 (Part #6815)
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$24.95 (Part #6815)

Pedal unit jack board
$16.95 (Part #6813)
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$16.95 (Part #6813)

Phone jack, 1/4-inch, 2-pin PCB mount
For Sustain
$10.95 (Part #3869)
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For Sustain
$10.95 (Part #3869)

Phone jack, 1/4-inch, 7-pin PCB mount
$10.95 (Part #3634)
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$10.95 (Part #3634)

Pitch bend assembly
$18.95 (Part #6794)
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$18.95 (Part #6794)

Pitch bend wheel spring, Yamaha
$4.95 (Part #6294)
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$4.95 (Part #6294)

Pitch bend/mod wheel, Yamaha
$8.95 (Part #2322)
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$8.95 (Part #2322)

Potentiometer, 10KB rotary
For Contrast
$8.95 (Part #3683)
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For Contrast
$8.95 (Part #3683)

Potentiometer, 10KB rotary
For Pitch Bend wheel
$8.95 (Part #4164)
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For Pitch Bend wheel
$8.95 (Part #4164)

Potentiometer, 5KAx2 rotary
For Volume
$8.95 (Part #5897)
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For Volume
$8.95 (Part #5897)

Power adapter, 12VDC, 2A
$29.95 (Part #PA1003)
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$29.95 (Part #PA1003)

Power inlet jack
$5.95 (Part #3062)
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$5.95 (Part #3062)

Power switch assembly, Yamaha
$16.95 (Part #6818)
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$16.95 (Part #6818)

Power switch cap, black, round
$6.95 (Part #5701)
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$6.95 (Part #5701)

Power switch, pushbutton
$11.95 (Part #2176)
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$11.95 (Part #2176)

Power/jack board, Yamaha DGX-640
$49.95 (Part #6795)
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$49.95 (Part #6795)

Right top end panel
$18.95 (Part #6785)
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$18.95 (Part #6785)

Speaker grille
$9.95 (Part #6782)
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$9.95 (Part #6782)

Speaker, tweeter assembly, Yamaha
$9.95 (Part #6817)
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$9.95 (Part #6817)

Speaker, Yamaha
$27.95 (Part #6838)
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$27.95 (Part #6838)

Style 64T key, textured black keys
$18.95 (Part #K64TBL)
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$18.95 (Part #K64TBL)

Style 64U key, bottom A note
$9.95 (Part #K64UAB)
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$9.95 (Part #K64UAB)

Style 64U key, lowest B note
$9.95 (Part #K64UBB)
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$9.95 (Part #K64UBB)

Style 64U key, top C note
$9.95 (Part #K64UC8)
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$9.95 (Part #K64UC8)

Style 64U keys, C-E-G-B group
$15.95 (Part #K64UC)
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$15.95 (Part #K64UC)

Style 64U keys, D-F-A group
$15.95 (Part #K64UD)
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$15.95 (Part #K64UD)

USB board, Yamaha
$11.95 (Part #6839)
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$11.95 (Part #6839)

USB connector
$6.95 (Part #3487)
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$6.95 (Part #3487)