Guangdong Zhuoning Technology Co., Ltd..-JM21_FAQ

JM21 Technical Support Center

Here you can get JM21 series introductory teaching, resource download, troubleshooting or after-sales maintenance services such

常见问题

- 2026-08-11
  1.User manual, download link of JM21
- 2026-08-11
  2. What should I do if the JM21 crashes or freezes? Forget Password?
- 2026-08-11
  3.How to access the storage/SD card after connecting the JM21 to a computer?
- 2026-08-11
  4.How to upgrade the JM21?
- 2026-08-11
  5.How to install third-party applications?
- 2026-08-11
  6.How to switch the working mode of the JM21?
- 2026-08-11
  7. How to enable the USB DAC function?
- 2026-08-11
  8. How to use the JM21 as a Bluetooth receiver?
- 2026-08-11
  9.How to use the JM21 as a Bluetooth transmitter?
- 2026-08-11
  10. How to connect the JM21 to an external decoder? Does it support USB audio digital output?
- 2026-08-11
  11. How to output coaxial digital signal from JM21?
- 2026-08-11
  12.What power supply adapter is suggested to charge the JM21?
- 2026-08-11
  13.How to use the Zhuoning Link function?
- 2026-08-11
  14.How to use the AirPlay function?
- 2026-08-11
  15.How to use the DLNA function?
- 2026-08-11
  16.Instructions for Settings->Audio menu
- 2026-08-11
  17.The indication of sampling rates
- 2026-08-11
  18.Instructions for Settings->Global menu
- 2026-08-11
  19.How to change the language on the JM21? Lyrics display, screenshot of the JM21
- 2026-08-11
  20.JM21 indicator light description
- 2026-08-11
  21.Does DK1Pro support JM21?
- 2026-08-05
  22. How to use the Zhuoning Cast function in JM21?
- 2026-08-28
  23. How to insert/eject the SD card to JM21?

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