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Small green circuit board with scroll wheel encoder and click switch for Logitech G603 mouse

YINGHUA

YINGHUA Mouse Wheel Encoder Board for Logitech G603 (3)

SKU CH-0QR4-7WG06

Replacement encoder board restores scrolling and middle-click function on a Logitech G603 mouse

  • Repair a faulty scroll wheel with a direct replacement encoder board
  • Choose from four micro-switch variants including Kailh GM 8.0 and TTC gold dust-proof options
  • Restore middle-click function without replacing the entire mouse
  • Single-piece PVC board fits the Logitech G603 precisely
  • Simple swap returns the mouse to reliable working order

Replacement Encoder Board for G603

This replacement encoder board targets owners of the Logitech G603 mouse whose scroll wheel has stopped registering or feels loose. It restores the middle-click and scrolling functions without requiring a new mouse.

Four Micro-Motion Switch Options

The board is offered with a choice of Kailh GM 8.0, TTC dust-proof gold, Kailh red dot or Kailh black dot micro-motion switches. Selecting a variant lets you match the original click feel or try a different tactile profile.

Single Board Repairs One Mouse

One board replaces the faulty encoder assembly in a single G603 unit. It addresses wheel failure and middle-click loss but does not fix sensor, battery or wireless issues.

Highlights

  • Repair a faulty scroll wheel with a direct replacement encoder board
  • Choose from four micro-switch variants including Kailh GM 8.0 and TTC gold dust-proof options
  • Restore middle-click function without replacing the entire mouse
  • Single-piece PVC board fits the Logitech G603 precisely
  • Simple swap returns the mouse to reliable working order

Specifications

No published specifications for this item yet.

Questions about this item

Will the Kailh GM 8.0 micro-motion switch on this encoder board need replacement again later?

The board uses a Kailh GM 8.0 micro-motion switch rated for millions of clicks, so it should last through extended use before any further replacement is needed.

What fails first on the G603 wheel encoder when scrolling continuously for hours?

Sustained scrolling mainly wears the mechanical encoder contacts; the PVC board and solder joints handle the load without a separate thermal or electrical limit appearing first.

Does the TTC dust-proof gold micro-motion option run hotter or louder than the Kailh red dot version during all-day use?

Both micro-motion variants are passive mechanical switches; they generate no measurable heat or noise of their own, so all-day operation stays silent and cool regardless of the chosen option.

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