Roland RD-300GX
Released in 2008The RD-300GX is an 88-note 128-voice digital piano.

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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

Bender assembly, Roland
$49.95 (Part #4666)
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$49.95 (Part #4666)

Bender frame, Roland
$16.95 (Part #5056)
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$16.95 (Part #5056)

Bender lever, Roland
$17.95 (Part #5054)
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$17.95 (Part #5054)

Bender PCB, pitch bend, Roland
For pitch
$14.95 (Part #5059)
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For pitch
$14.95 (Part #5059)

Bender PCB, Roland
For modulation
$14.95 (Part #5060)
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For modulation
$14.95 (Part #5060)

Bender plate, Roland
For pitch
$12.95 (Part #5057)
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For pitch
$12.95 (Part #5057)

Bender plate, Roland
For modulation
$8.95 (Part #5058)
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For modulation
$8.95 (Part #5058)

Bender spring, Roland
For modulation
$2.95 (Part #5055)
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For modulation
$2.95 (Part #5055)

Button, black, Roland/Boss
$9.95 (Part #7019)
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$9.95 (Part #7019)

Button, translucent, Roland
$2.95 (Part #3521)
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$2.95 (Part #3521)

Button, with LED window, Roland
$5.95 (Part #1531)
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$5.95 (Part #1531)

Button, with LED window, Roland
For bender panel buttons
$3.95 (Part #4476)
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For bender panel buttons
$3.95 (Part #4476)

Contact strip, 12-note, Roland
$12.95 (Part #7385)
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$12.95 (Part #7385)

Contact strip, 4-note, Roland
$10.95 (Part #7395)
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$10.95 (Part #7395)

Contact strip, 8-note, Roland
$11.95 (Part #7394)
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$11.95 (Part #7394)

Cord lock, Roland
$8.95 (Part #6062)
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$8.95 (Part #6062)

Display, Roland
$179.95 (Part #1529)
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$179.95 (Part #1529)

Hammer weight, #0 (white key), Roland
$8.95 (Part #8345)
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$8.95 (Part #8345)

Hammer weight, #1 (white key), Roland
$8.95 (Part #7384)
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$8.95 (Part #7384)

Hammer weight, #2 (white key), Roland
$8.95 (Part #7382)
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$8.95 (Part #7382)

Hammer weight, #3 (white key), Roland
$8.95 (Part #7383)
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$8.95 (Part #7383)

Hammer weight, #7 (black key), Roland
$8.95 (Part #8346)
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$8.95 (Part #8346)

Hammer weight, #8 (black key), Roland
$8.95 (Part #8347)
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$8.95 (Part #8347)

Knob, rotary, Roland
$9.95 (Part #3643)
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$9.95 (Part #3643)

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

Potentiometer, 10KB rotary
For pitch bender
$9.95 (Part #3029)
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For pitch bender
$9.95 (Part #3029)

Potentiometer, 10KB rotary
For bender modulation
$8.95 (Part #2982)
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For bender modulation
$8.95 (Part #2982)

Potentiometer, 10KB rotary
For Contrast
$9.95 (Part #1231)
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For Contrast
$9.95 (Part #1231)

Potentiometer, 50KB rotary with center detent
For EQ/Effects
$10.95 (Part #2612)
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For EQ/Effects
$10.95 (Part #2612)

Power adapter, 9VDC, 2000mA
$42.95 (Part #2512)
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$42.95 (Part #2512)

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

Power switch, pushbutton
$14.95 (Part #3543)
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$14.95 (Part #3543)

Pushbutton tact switch, 5.5mm, 2-pin
For use under larger buttons
$9.95 (Part #3941)
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For use under larger buttons
$9.95 (Part #3941)

Pushbutton tact switch, 5mm, 2-pin
$1.95 (Part #4478)
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$1.95 (Part #4478)

Pushbutton tact switch, with orange LED
For use under translucent buttons
$9.95 (Part #2389)
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For use under translucent buttons
$9.95 (Part #2389)

Pushbutton tact switches, 5mm, pkg of 10
$11.95 (Part #4478X)
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$11.95 (Part #4478X)

Rubber foot, 3/8-inch tall
$1.45 (Part #4295)
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$1.45 (Part #4295)

Slide potentiometer, 10KB, 30mm
For Zone Level
$17.95 (Part #4682)
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For Zone Level
$17.95 (Part #4682)

Slide potentiometer, 10KBx2, 30mm
For Volume
$19.95 (Part #4531)
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For Volume
$19.95 (Part #4531)

Slider knob, Roland/Boss
$6.95 (Part #4888)
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$6.95 (Part #4888)

Spring for bender/joystick
$1.95 (Part #4956)
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$1.95 (Part #4956)

Style 79U key, black note
$9.95 (Part #K79UBL)
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$9.95 (Part #K79UBL)

Style 79U key, bottom A note
$16.95 (Part #K79UAB)
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$16.95 (Part #K79UAB)

Style 79U key, note A
$11.95 (Part #K79UA)
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$11.95 (Part #K79UA)

Style 79U key, note B
$11.95 (Part #K79UB)
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$11.95 (Part #K79UB)

Style 79U key, note C
$11.95 (Part #K79UC)
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$11.95 (Part #K79UC)

Style 79U key, note D
$11.95 (Part #K79UD)
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$11.95 (Part #K79UD)

Style 79U key, note E
$11.95 (Part #K79UE)
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$11.95 (Part #K79UE)

Style 79U key, note F
$11.95 (Part #K79UF)
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$11.95 (Part #K79UF)

Style 79U key, note G
$11.95 (Part #K79UG)
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$11.95 (Part #K79UG)

Style 79U key, top C note
$16.95 (Part #K79UC8)
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$16.95 (Part #K79UC8)

Switch cap, black
For Power
$4.95 (Part #4665)
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For Power
$4.95 (Part #4665)