Introduction
Thank you for purchasing the EPOMAKER TH108 JIS Mechanical Keyboard. This manual provides detailed instructions on how to set up, operate, maintain, and troubleshoot your keyboard. The TH108 JIS is a full-size Japanese layout mechanical keyboard featuring hot-swappable switches, RGB backlighting, and versatile connectivity options including wired USB-C, 2.4GHz wireless, and Bluetooth.
For additional support, please refer to the official user manual PDF: EPOMAKER TH108 JIS User Manual (PDF)
Package Contents
Please check the box for the following items:
- 1 x EPOMAKER TH108 JIS Full Size Gaming Keyboard
- 1 x USB A-to-C Cable
- 1 x Wireless 2.4GHz Receiver (stowed under the left kickstand of the keyboard)
- 2 x Preliminary Switches (extra switches for replacement or testing)
- 1 x 2-in-1 Switch & Key Cap Puller
- 1 x Japanese Manual
Setup and Connection
1. Wired Connection
- Toggle the connection switch on the keyboard to the USB position to ensure it is in wired mode.
- Insert the USB-C cable into the Type-C port on the keyboard and connect the other end to your computer.
- The backlight will illuminate, indicating a successful wired connection.
2.4GHz Wireless Connection
- Toggle the connection switch on the keyboard to the 2.4G position to ensure it is in wireless mode.
- Short press the FN + R keys. The light indicator will flash rapidly.
- Insert the 2.4G receiver into a USB port on your device.
- Once the light indicator stops flashing and returns to the current backlight effect, the keyboard is successfully connected.
Note: To enter 2.4GHz pairing mode, press and hold FN + R until the R key indicator flashes rapidly.
Bluetooth Pairing
- Toggle the connection switch on the keyboard to the BT position to ensure it is in wireless mode.
- Press and hold FN + Q, FN + W, or FN + E until the corresponding light indicator flashes rapidly. This indicates the keyboard is in pairing mode for Bluetooth device 1, 2, or 3 respectively.
- On your device (computer, tablet, phone), open Bluetooth settings and search for available devices.
- Select "Epomaker TH108 JP-1", "Epomaker TH108 JP-2", or "Epomaker TH108 JP-3" to connect.
- Once the light indicator stops flashing and returns to the current backlight effect, the keyboard is successfully connected to your device.
Note: You can short press FN + Q, FN + W, or FN + E to switch between the three paired Bluetooth devices.
Battery Level Check
In wireless mode, press and hold FN + ENTER to check the keyboard's battery level. While holding these keys, the backlight will turn off, and keys 1! through 0) will light up to indicate the battery percentage.
- If keys 1! to 6^ are lit, the battery is at 60%.
- If keys 1! to 0) are lit, the battery is at 100%.
Important:
- The keyboard charges whenever a USB cable is inserted, regardless of whether it's in wired or wireless mode.
- Do not use a dedicated wall charger to charge the keyboard; this can damage the internal battery. Charge only via a computer USB port.
Sleep Mode
- Wired Mode: The backlight remains on when the display is off (can be woken by pressing any key). The backlight turns off when the device enters sleep mode.
- Wireless Mode: The backlight turns off after 5 minutes of inactivity (can be woken by pressing any key without delay). The backlight turns off when the device enters sleep mode; pressing any key will wake and reconnect the keyboard (Q/W/E/R lights will flash during reconnection).
Operating Instructions
Function Key Combinations
The keyboard features various function key combinations for enhanced control:
| Combination | Function | Windows | Mac |
|---|---|---|---|
| FN + ESC | Factory Reset | ||
| FN + R | 2.4G Wireless Pairing (long press) | ||
| FN + Q | Bluetooth Device 1 Pairing (long press) / Switch to Device 1 (short press) | ||
| FN + W | Bluetooth Device 2 Pairing (long press) / Switch to Device 2 (short press) | ||
| FN + E | Bluetooth Device 3 Pairing (long press) / Switch to Device 3 (short press) | ||
| FN + WIN | Lock/Unlock Windows Key (Windows only) | ||
| FN + ENTER | Battery Level Check | ||
| F1 | Screen Brightness - | F1 | F1 |
| FN + F1 | Screen Brightness - | F1 | F1 |
| F2 | Screen Brightness + | F2 | F2 |
| FN + F2 | Screen Brightness + | F2 | F2 |
| F3 | Task Control | F3 | F3 |
| FN + F3 | Task View | F3 | F3 |
| F4 | Launchpad | F4 | F4 |
| FN + F4 | My Computer | F4 | F4 |
| F5 | Short press: Search / Long press: Siri | F5 | F5 |
| FN + F5 | Search | F5 | F5 |
| F6 | Screenshot | F6 | F6 |
| FN + F6 | Screenshot | F6 | F6 |
| F7 | Previous Track | F7 | F7 |
| FN + F7 | Previous Track | F7 | F7 |
| F8 | Play/Pause | F8 | F8 |
| FN + F8 | Play/Pause | F8 | F8 |
| F9 | Next Track | F9 | F9 |
| FN + F9 | Next Track | F9 | F9 |
| F10 | Mute | F10 | F10 |
| FN + F10 | Mute | F10 | F10 |
| F11 | Volume - | F11 | F11 |
| FN + F11 | Volume - | F11 | F11 |
| F12 | Volume + | F12 | F12 |
| FN + F12 | Volume + | F12 | F12 |
Lighting Control
- FN + ↑: Increase backlight brightness
- FN + ↓: Decrease backlight brightness
- FN + ←: Decrease backlight effect speed
- FN + →: Increase backlight effect speed
- FN + INS: Switch backlight effect mode
- FN + DEL: Switch backlight color
- FN + HOME: Switch light strip effect mode
Keycap and Switch Replacement
The TH108 JIS keyboard supports hot-swappable switches, allowing you to easily change switches without soldering. Use the included 2-in-1 puller tool for this process.
For a detailed guide on how to remove and replace keycaps and switches, please refer to the online resource: EPOMAKER DIY Guide: How to Remove and Replace Mechanical Keyboard Switches
Tools Required:
- Keycap Puller (part of the 2-in-1 tool)
- Switch Puller (part of the 2-in-1 tool)
General Steps:
- Remove Keycaps: Use the keycap puller to gently pull up on the keycaps you wish to remove.
- Remove Switches: Use the switch puller to grasp the top and bottom clips of the switch. Apply gentle, even pressure and pull the switch straight up from the PCB.
- Install Switches: Ensure the new switch's pins are straight and align them with the holes on the PCB. Gently press the switch down until it clicks into place. Do not force it.
- Install Keycaps: Align the keycap with the switch stem and press down firmly.
Important Warnings:
- Before installing a new switch, ensure its pins are perfectly straight and clean. Bent pins can prevent the switch from working or damage the PCB socket.
- Do not use excessive force when removing or installing switches/keycaps. This can damage the switch, keycap, or keyboard PCB.
- If a switch pin bends during removal, carefully straighten it before re-inserting. If a pin breaks, the switch may be irreparable.
Specifications
| Feature | Detail |
|---|---|
| Brand | EPOMAKER |
| Model | TH108 JIS |
| Layout | 100% Full Size Japanese Array |
| Number of Keys | 112 Keys |
| Case Material | ABS Plastic |
| Mount Structure | Gasket Mount |
| Plate Material | PC Resin (Flex Cut) |
| Stabilizer | Plate-mounted (precision-adjusted) |
| Anti-Ghosting | NKRO (N-Key Rollover) |
| PCB | Hot-swappable (compatible with 3-pin/5-pin mechanical switches) |
| Connection Methods | Wired (USB Type-C), 2.4GHz Wireless, Bluetooth |
| LED | South-facing, Per-key RGB Backlight |
| Polling Rate | 1000Hz (Wired & 2.4GHz), 125Hz (Bluetooth) |
| Latency | 2ms (USB), 5ms (2.4GHz Wireless), 11ms (Bluetooth) |
| Battery | 8000mAh Rechargeable Battery |
| OS Compatibility | Windows, Mac, Android, iOS |
| Dimensions (L x W x H) | 445.15 x 141.1 x 41.79 mm (17.5 x 5.5 x 1.65 inches) |
| Weight | 1.14 kg (2.5 lbs) |
| Typing Angle | 6, 8, 10.5 degrees (2-step adjustable kickstand) |
| Soundproofing | Five-layer structure (PORON sandwich foam, IXPE switch pad, sound enhancement PET, PORON switch socket foam, bottom Silicon) |
| Keycap Profile | Cherry Profile |
| Keycap Material | PBT Plastic |
| Keycap Printing | Doubleshot |
| Switches (Options) | EPOMAKER Creamy Jade (Linear, Pre-lubed) EPOMAKER Sea Salt Silent V2 (Silent Linear, Pre-lubed) |
EPOMAKER Creamy Jade Switch Specifications:
- Switch Type: 5-pin mechanical switch, linear, pre-lubed
- Trigger Force: 45 ± 5gf
- Bottom-out Force: 50 ± 5gf
- Pre-travel: 2.0 ± 0.4mm
- Total Travel: 3.6 ± 0.4mm
EPOMAKER Sea Salt Silent V2 Switch Specifications:
- Switch Type: 5-pin mechanical switch, silent, linear, pre-lubed
- Trigger Force: 45 ± 5gf
- Bottom-out Force: 51 ± 5gf
- Pre-travel: 1.8 ± 0.4mm
- Total Travel: 3.5 ± 0.4mm
- Top Case: Transparent PC
- Bottom Case: Light Blue PA66
- Stem: Yellow POM
- Special Specification: Dust-proof
Troubleshooting
- Keyboard not connecting (Wired): Ensure the USB-C cable is fully inserted into both the keyboard and your computer. Try a different USB port or cable. Check if the connection switch is set to USB mode.
- Keyboard not connecting (2.4GHz Wireless): Ensure the 2.4G receiver is properly inserted into a USB port. Check if the connection switch is set to 2.4G mode. Re-initiate pairing by short pressing FN + R.
- Keyboard not connecting (Bluetooth): Ensure the connection switch is set to BT mode. Re-initiate pairing by long pressing FN + Q/W/E until the indicator flashes. Make sure Bluetooth is enabled on your device and try re-pairing.
- Keys not responding: If individual keys are not working, check if the switch pins are bent or damaged. Carefully remove the keycap and switch, inspect the pins, straighten them if necessary, and re-insert.
- Backlight not working or inconsistent: Check backlight brightness settings (FN + ↑/↓). Try switching backlight effects (FN + INS) or colors (FN + DEL). If the issue persists, perform a factory reset (FN + ESC).
- Battery not charging: Ensure the USB cable is connected to a computer's USB port. Avoid using wall chargers. If the battery indicator (FN + ENTER) shows no charge, try a different USB port or cable.
- Keyboard unresponsive after sleep: For wireless mode, press any key to wake the keyboard. If it doesn't reconnect, check the connection mode and re-pair if necessary.
User Tips
- Switch Customization: Take advantage of the hot-swappable PCB to experiment with different 3-pin or 5-pin mechanical switches. This allows you to fine-tune the typing feel and sound to your personal preference. Always ensure switch pins are straight before insertion to prevent damage.
- Software Customization: Utilize the dedicated web driver software for deep customization of key assignments, macro commands, and backlight effects. This can significantly enhance your workflow and gaming experience.
- Battery Management: To maximize battery life, consider turning off RGB backlighting when not needed, especially in wireless modes. Regularly check the battery level using FN + ENTER to avoid unexpected power loss.
Warranty and Support
Warranty Information
EPOMAKER provides a one-year warranty for products purchased directly from epomaker.com. This warranty covers manufacturing defects that prevent the product from functioning correctly under normal use. It does not cover issues arising from normal wear and tear, misuse, or unauthorized modifications.
Unauthorized modifications include, but are not limited to, replacing internal components, disassembling or reassembling the product, or replacing the battery without official authorization.
If your product is found to have a manufacturing defect upon arrival, it may be eligible for replacement. You may be required to return the defective product before a replacement is sent.
Technical Support
For technical assistance or support, please contact EPOMAKER directly via email:
- Email: support@epomaker.com
When contacting support, please provide your order number and a detailed description of the issue. EPOMAKER aims to respond to inquiries within 24 hours.
Note: If you purchased your product from a retailer other than the official EPOMAKER store, please contact that retailer directly for support and warranty claims.
Compliance and Disclaimers
Disclaimer
Images and product information provided in this manual and on product pages may be automatically translated by AI. These translations are provided on an "as is" basis and for convenience only, and may contain inaccuracies or inconsistencies. If you have any questions or need to confirm product details, please refer to the original version or contact Customer Service.
Regulatory Compliance
This device complies with relevant regulatory standards. Markings such as CE, RoHS, and FC are present on the product and/or packaging, indicating adherence to European, Restriction of Hazardous Substances, and Federal Communications Commission standards, respectively.
WARNING: Choking Hazard - Small Parts. Keep away from children and pets.
