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はじめに

This guide cover disassembly for purpose of switch replacement, but does not cover the actual switch replacement beyond advice and useful help in sourcing a replacement.

必要な工具と部品

手順1 Open the case

Logitech Mouse G302 Disassembly, Open the case: 手順 1、 2の画像 1

Logitech Mouse G302 Disassembly, Open the case: 手順 1、 2の画像 2

Turn the mouse over to access the bottom.
Using a scalpel, pick, or similar tool, peel off the front and rear soles (slide pads) on the bottom of the mouse. This exposes three screws.
Using a Phillips #0 driver, remove the three screws circled in red.
Use care to salvage as much of the sole adhesive as possible, in order to reuse it. If, however the adhesive is inadequate on reassemby, contact cement is a good substitute.
Carefully separate the two halves of the case. Light prying may be required. If you examine the second photo you can see one of the plastic retaining tabs on the front of the top half. A pick or similar tool prove helpful without marring the case.
Remove the three Phillips PH000 screws circled in orange; The PCB can then be removed for inspection and repair.

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手順2 Switch replacement

Logitech Mouse G302 Disassembly, Switch replacement: 手順 2、 2の画像 1

Logitech Mouse G302 Disassembly, Switch replacement: 手順 2、 2の画像 2

The switch manufacturer is Omron, part number: D2FC-F-7N. The switches have three lead pins, two of which are used.
My experience was one switch working intermittently. In such a case, I recommend replacing both the left and right switches.

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手順3 Switch information

Logitech Mouse G302 Disassembly, Switch information: 手順 3、 1の画像 1

This may be helpful in finding the correct or compatible replacement i.e. online vendors such as AliExpress.
What I used as a successful replacement: RS Components Stock No. 682-1519 microswitch. Manufactured by Omron—part number: D2F-F.

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