Marshall Major IV Control Knob Replacement
Drew Kavanagh and one other contributor
Last updated on Jun 9, 2026
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Introduction
Go to step 1 ↓If the control knob is not working to control volume or power the headphones off or on, then the control knob is likely faulty. This guide will walk you through how to replace the knob safely and efficiently.
Keep in mind that all of these steps are from the right side of your headphones; the location of where you see the control knob indicates where the right side is.
What you need
Tools
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Spudger4.9
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Find the side of the headphones with the control knob.
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Twist counterclockwise on the ear cushion to remove it.
Ask FixBot
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Flip up the black locking flap that secures the ribbon cable.
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Disconnect the ribbon cable.
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Lift out the small PCB.
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To reassemble your device, follow these instructions in reverse order.
Team
UMass Dartmouth, Team 2-3, Biswokarma Spring 2026 Member of UMass Dartmouth, Team 2-3, Biswokarma Spring 2026
UMASSD-BISWOKARMA-S26S2G3
5 Members
48 Guides authored
