To change soldered keyboard switches, you need to desolder the existing switch from the circuit board and then solder the new switch in its place.
Changing soldered keyboard switches is a more involved process than swapping hot-swappable switches, requiring tools like a soldering iron and desoldering pump or wick. However, it allows for extensive customization on keyboards that aren't hot-swap compatible. The core process involves removing the old switch and securing the new one electronically.
Essential Steps to Replace Soldered Switches
Replacing a soldered switch requires careful work to avoid damaging the keyboard's printed circuit board (PCB). Here is a breakdown of the typical process:
h3>1. Preparation
Before you begin, gather the necessary tools and prepare your workspace.
- Tools You'll Need:
- Soldering Iron (adjustable temperature is recommended)
- Desoldering Pump or Desoldering Wick
- Solder (Rosin core, leaded or lead-free, suitable for electronics)
- New Mechanical Switches
- Switch Puller (to remove keycaps)
- Small Phillips Head Screwdriver (to open the keyboard case)
- Tweezers
- Flush Cutters (optional, for trimming solder leads)
- Safety Glasses
- Ventilation or Fume Extractor
- Workspace: Work in a well-lit, stable area. Protect your surface from heat and solder drips.
- Keyboard Disassembly: Unplug your keyboard. Remove all keycaps using a switch puller. Open the keyboard case using the screwdriver to access the PCB.
h3>2. Desoldering the Old Switch
This is the crucial step where you remove the old switch's connection from the PCB.
- Locate Solder Joints: Identify the two solder joints on the back of the PCB corresponding to the switch you want to replace. There might also be smaller pads for LEDs if your switch or PCB supports them.
- Heat the Joint: Heat one solder joint with your soldering iron.
- Remove Solder: As soon as the solder melts, use a desoldering pump to quickly suck away the liquid solder, or apply desoldering wick to absorb it. Repeat for both pins (and LED pads if applicable).
- Verify Removal: Ensure the holes in the PCB where the switch pins were are clear of solder. You might need to repeat the heat and remove process if solder remains.
- Remove Switch: Once the solder is removed, you can typically gently push or pull the switch out from the front of the plate/PCB assembly.
Reference Information: For keyboards with soldered switches, desolder the switch from the circuit board first. (Source: 15-Oct-2024)
h3>3. Installing the New Switch
With the old switch removed and the holes clear, you can now place the new switch.
- Align Pins: Take your preferred mechanical switch replacement. Ensure the pins are aligned properly with the holes on the PCB. The switch housing usually has a notch that helps orient it correctly on the plate.
- Insert Switch: Gently push the new switch into the plate and PCB until it is seated flush. Check from the back of the PCB to ensure the pins are fully through the holes.
h3>4. Soldering the New Switch
Now you will create a permanent electrical connection for the new switch.
- Apply Solder: Heat the pad and the switch pin simultaneously with your soldering iron. Feed a small amount of solder onto the joint, allowing it to flow neatly around the pin and onto the pad. You want enough solder to form a small, shiny cone shape that connects the pin to the pad securely.
- Repeat: Solder the second switch pin (and any LED pins if present) in the same manner.
- Inspect Joints: Visually inspect your solder joints. They should be shiny and well-connected, not dull or lumpy ("cold joints").
Reference Information: Insert your preferred mechanical switch replacement. Ensure the pins are aligned properly. Solder the switch accordingly for keyboards that require it. (Source: 15-Oct-2024)
h3>5. Testing
Before reassembling the keyboard, test the new switch.
- Temporary Reassembly: Connect the PCB to your computer (you might not need the full case assembled).
- Test Functionality: Use a keyboard test website or software to ensure the specific key associated with the new switch registers correctly when pressed. Also, check if any LEDs work if applicable.
- Troubleshooting: If the switch doesn't work, check your solder joints for continuity or bridging. Ensure the pins weren't bent during insertion.
h3>6. Reassembly
Once you've verified the switch works, reassemble your keyboard case and put the keycaps back on.
Table: Common Tools for Soldered Switch Replacement
| Tool | Purpose | Notes |
|---|---|---|
| Soldering Iron | Heating solder joints | Adjustable temperature control is helpful |
| Desoldering Pump/Wick | Removing molten solder | Essential for clearing old joints |
| Solder | Creating new connections | Use electronics-grade solder |
| Switch Puller | Removing keycaps | Prevents damage to keycaps/switches |
| Screwdriver | Opening keyboard case | Size depends on keyboard model |
Changing soldered switches takes practice, but with the right tools and patience, you can successfully customize your keyboard's feel. Always prioritize safety by using ventilation and safety glasses.
