Brand: YAMAHA
Category: Audio/Video
Document Type: Manual
Language: EN
Brand: YAMAHA
Category: Audio/Video
Document Type: Manual
Language: EN
Uploaded: Nov. 21, 2025, 8:27 p.m.
Manual Publish Date: 2020-08-01
Refer to the "User Guide (Basic)" or contact your dealer for warranty information.
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound can be heard | Product not connected to Bluetooth device. | Pair the product. |
| Volume is too low. | Raise the volume. | |
| Music stopped playing back. | Start playback. | |
| Eartips don't fit ears. | Select eartips that match ear shape and fit securely. | |
| Sound can only be heard from one earphone | Unstable connection. | Move away from wireless devices. Reinsert earphones into the charging case and take them out again. |
| Smartphone app generates sound from only one channel. | Check with a different app. | |
| One earphone is turned off. | Turn the power on. | |
| Bluetooth device connection information is improper. | Delete connection information and re-pair. | |
| Power will not turn on | Insufficient battery power. | Charge the product. |
| Charging case battery depleted while charging earphones. | Press function keys until blue, then charge the case. | |
| Product temporarily not functioning stably. | Place both earphones in the charging case, wait 10 seconds, then remove. | |
| The product cannot be charged | Product terminal covered by silicone sleeve. | Reattach the silicone sleeve correctly. |
| Computer not turned on (when charging from computer). | Turn on the computer. | |
| Using a USB power cable other than the included one. | Use the included USB power cable. | |
| Cannot connect to a Bluetooth device | Product and Bluetooth device too far apart. | Move them closer. |
| Electromagnetic interference nearby. | Do not use near devices emitting electromagnetic waves. | |
| Bluetooth device connection information is improper. | Delete connection information and re-pair. | |
| Bluetooth device registration information deleted. | Pair the product again. | |
| Product already connected to another Bluetooth device. | Disconnect the other device and connect to the new one. | |
| The product does not operate or play back | Product is charging. | Use after charging is finished. |
| No remaining battery power. | Charge the product. | |
| Product temporarily not functioning stably. | Place both earphones in the charging case, wait 10 seconds, then remove. | |
| The sound is distorted, noisy or choppy | Unstable connection due to signal interference. | Move away from wireless devices. Move the Bluetooth device closer. Turn off wireless network connectivity on the Bluetooth device. |
| Product temporarily not functioning stably. | Place both earphones in the charging case, wait 10 seconds, then remove. | |
| Restoring this product to factory defaults | (Refer to pages 49-52 for detailed steps) | Follow the specific multi-step procedure involving function key presses and durations. |
| Problem Still Not Resolved | (Refer to page 53) | Contact store of purchase, Product Support Center (Japan), or nearest authorized Yamaha dealer/service center (outside Japan). |