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Introduction

The trigger assembly on the Flydigi Apex 4 is responsible for detecting analog input when the trigger is pressed. Over time, the trigger mechanism may wear out or become damaged, resulting in inconsistent inputs, a lack of response, or a trigger that feels physically loose. This guide will walk you through safely removing and replacing the trigger assembly. Before beginning the repair, ensure the controller is powered off and unplugged.

What you need

Step 1 Trigger Assembly

Flydigi Apex 4 Trigger Assembly Replacement, Trigger Assembly: step 1, image 1 of 3

Flydigi Apex 4 Trigger Assembly Replacement, Trigger Assembly: step 1, image 2 of 3

Flydigi Apex 4 Trigger Assembly Replacement, Trigger Assembly: step 1, image 3 of 3

Ensure the controller is fully powered off before beginning.
Disconnect the USB-C cable if the controller is plugged in.
Remove any wireless adapter or dongle connected to your device.
Never work on the controller while it is powered on or charging. Doing so may damage internal components or cause injury.

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Step 2

Flydigi Apex 4 Trigger Assembly Replacement: step 2, image 3 of 3

Remove the button caps and the magnetic faceplate of the controller.
It should come off with a tug.
Use a Phillips #00 screwdriver to remove the four screws securing the front of the controller to the frame.
Some screws may be hidden under grip pads or stickers. Gently peel these back if necessary.

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Step 3

Insert a plastic opening tool into the seam between the front and back shell along the bottom edge of the controller.
Gently run the opening tool along the seam to release the plastic clips holding the two halves together.
Work your way around all edges until the back shell is fully unclipped.
Carefully lift the back shell away from the front half and set it aside.
Do not force the shell open. If you feel strong resistance, check for any screws you may have missed.

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Step 4

With the controller open, identify the trigger assembly on the side you are replacing.
The trigger assembly consists of the trigger lever, the spring mechanism, and the analog sensor attached to the internal frame.
Take a photo of the internal layout before removing any components. This will help you reassemble the controller correctly.

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Step 5

Flydigi Apex 4 Trigger Assembly Replacement: step 5, image 3 of 3

Use a spudger or your fingernail to gently flip up the locking tab on the connector linking the trigger assembly to the main PCB.
Carefully pull the ribbon cable straight out of the connector.
Do not pull at an angle, as this may tear the cable.

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Step 6

Use a Phillips #00 screwdriver to remove the screws securing each trigger assembly.
Lift the trigger assembly straight up and out of the controller frame.

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