JL Bluetooth Test Box User Manual

1. Introduction

The JL Bluetooth Test Box is a specialized tool designed for efficient batch testing and firmware upgrades of JieLi Audio Bluetooth chips, including AC692N, AC695N, AC696N, and other AC69xx/AI800x/AC460x series. It offers an alternative to smartphone-based testing, significantly improving test efficiency for production environments. This manual provides comprehensive instructions for setting up, operating, and maintaining your test box.

2. Package Contents

Please verify that all items listed below are included in your package:

• One (1) JL Bluetooth Test Box
• One (1) Original 9V Power Adapter

No additional accessories are required for basic operation.

3. Product Features

The JL Bluetooth Test Box offers the following key functionalities:

• Batch Testing: Capable of testing two Bluetooth devices simultaneously, suitable for production runs below 5,000 units.
• Firmware Upgrades: Supports over-the-air (OTA) firmware upgrades after pairing with a Bluetooth device. Also supports wireless upgrades via TF card.
• Frequency Offset Display & Correction: Displays the frequency offset of connected Bluetooth devices, aiding in identifying defective boards. It can also automatically repair and correct frequency offset for faulty boards, with calibration data saved permanently.
• Compatibility: Fully compatible with all JL (JieLi) Bluetooth chip series PCBAs/modules/boards/devices, including AC697X, 696X, 695X, 693X, AI800X, AC692X, AC691X, AC690X, AC460X series.
• Efficiency: Provides optimal testing performance for JL's own Bluetooth chip solutions, significantly improving test efficiency compared to smartphone-based methods.

Important Note: This test box is exclusively designed for JieLi (JL) Bluetooth solutions and will not connect with Bluetooth chips from other brands.

4. Components Overview

5. Setup

5.1 Initial Power-Up

1. Connect the provided 9V Power Adapter to the 9V Power Input Port on the test box.
2. Flip the Power Toggle Switch to the ON position. The Power Indicator Light should illuminate.
3. The LCD Display Screen will show "CH1: 搜索中" and "CH2: 搜索中" (Searching) if no TF card is inserted, indicating normal operation.

5.2 Preparing for Firmware Upgrade via TF Card

To perform a firmware upgrade using a TF card, follow these steps:

1. Required Components:
   • One (1) TF Card (32GB or less), formatted to FAT or FAT32 file system.
   • At least two (2) MP3 files (no specific requirements for the MP3 files).
   • The firmware upgrade file named "updata.bfu".
2. Preparation Steps:
   1. Disconnect the power to the test kit.
   2. Locate the TF card slot on the back of the test kit.
   3. Copy the firmware upgrade file named "updata.bfu" and at least two MP3 files to the root directory of the TF card.
   4. Insert the prepared TF card into the slot on the back of the test kit.

6. Operation

6.1 Bluetooth Device Testing

Once powered on, the test box will automatically connect to Bluetooth boards for testing. It can test two Bluetooth devices simultaneously.

• The LCD will display the Bluetooth name, Bluetooth address, and frequency offset.
• It performs frequency offset display and calibration of the Bluetooth crystal oscillator.
• Call tests are also supported.

6.2 Firmware Upgrade Process (via TF Card)

After preparing the TF card as described in Section 5.2:

1. Power on the test kit with the TF card inserted.
2. The display should change from "CH1: 搜索中" (Searching) to "CH1: BT升级搜索中" (BT Upgrade Searching) or similar, indicating it's waiting for an upgrade.

   

   If this message does not appear, it likely means the TF card was not detected. Check that it is inserted properly and formatted correctly.

3. The upgrade process will begin, and a progress bar will be displayed on the LCD screen.

   

4. When the progress reaches 100%, the upgrade is complete.

6.3 Remote Firmware Updates (OTA)

Test boxes purchased since 2022 support remote firmware updates. Refer to the user manual (available via the technical resources link) for detailed instructions on this process.

7. Maintenance

• Keep the device clean and free from dust. Use a soft, dry cloth for cleaning.
• Avoid exposing the device to extreme temperatures or humidity.
• Store the device in a safe place when not in use to prevent physical damage.

8. Troubleshooting

8.1 Common Issues and Solutions

Q: The test box does not power on.

A: Ensure the 9V power adapter is correctly connected and the power switch is in the ON position. Verify the power outlet is functional.

Q: The TF card is not detected during firmware upgrade.

A: Ensure the TF card (32GB or less) is formatted to FAT or FAT32. Verify that the "updata.bfu" file and at least two MP3 files are copied to the root directory of the TF card. Reinsert the TF card securely.

Q: System crashes (freezes) occur during the upgrade process.

A: Do NOT power off the target board if the system crashes. The system will automatically attempt a second upgrade. Powering off during a crash can brick the device.

Q: The test box cannot connect to other brands of Bluetooth chips.

A: This test box is specifically designed for JieLi (JL) Bluetooth solutions only. It is not compatible with other brands.

Q: Values of frequency offset measured are very different.

A: This often indicates poor quality or inconsistent crystal oscillators. While the test box can partially correct this, using high-quality crystal oscillators is recommended for better Bluetooth stability and connection range.

Q: Do I need to retest after a software upgrade?

A: Yes, it is recommended to retest to verify the upgrade process. If the frequency offset correction function was used, calibration data might be lost and require re-correction. It's best to perform software upgrades before the final test process.

9. Specifications

10. User Tips

• For general use, no complex configuration is required; simply power on the device.
• If specific configurations are needed (e.g., connecting to a specified Bluetooth name, reducing wireless coverage to avoid interference), connect the test box to a computer via USB for configuration.
• Consider using high-quality crystal oscillators for your Bluetooth boards. JieLi's first-class solution provider crystal oscillators are recommended for their strict quality control and consistency, which significantly impacts Bluetooth distance and stability.
• A single test box can test two Bluetooth devices simultaneously, making it efficient for production runs up to 5,000 units. Adjust the number of test boxes based on your production capacity and testing schedule.

11. Warranty and Technical Support

• After-sales service: One year warranty.
• Technical support: Contact us for any problems during use.

For the latest and complete operating instructions, technical resources, schematics, FAQs, debugging guides, and critical notes, please refer to the official documentation:

JL(JieLi) Bluetooth Test Box Usage Instructions.pdf and other resources are available at: Google Drive Link

Feel free to call for consultation at any time or contact us to obtain documentation or communicate.

12. Important Notes

• If the test box is functioning correctly, avoid manually updating its firmware. It is a tool, and its primary function is to work reliably.
• All test boxes purchased since 2022 support remote firmware updates. Refer to the user manual for specific instructions.
• If a manual update renders the test box inoperable ("bricks" it), you will need to force-flash it to version V1.2.2 before attempting any remote upgrades.
• For test boxes with firmware versions lower than V1.2.2, a manual upgrade to V1.2.2 is mandatory before you can utilize the remote update feature.

⚠ WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.