CHOYONG LC90 Manual

Instructions for use

Getting started

LC90 is powered by 2*18650 rechargeable lithium battery. A USB-Type-C cable is supplied in the package.
Press and hold the ( ) button to power on. To shutdown the radio, press and hold the same button.

Charging battery

To charge the battery, connect the Type-C cable to 5V power adapter, you can use any mobile phone charger, the mobile quick charge protocol ensures that the output voltage of the charger will adjust to 5V when charging to radio, but DO NOT USE THE CHARGER OF IPAD OR COMPUTER!
Note: The charging might take much longer to complete if the radio is playing while charging.

Bluetooth playback

Press the BT( ) Key to make the radio enter Bluetooth mode.
Open your device's Bluetooth setting, and active the pairing mode, the device scans for Bluetooth devices.
When the radio is found, your Bluetooth device shows its name "Choyong-LC90",select the radio and connect it.
Then you can start playback on your Bluetooth device, you can control the playback by the radio(next, previous, pause...
The connection will be restored automatically when both devices are in range and the radio in Bluetooth mode.

Software update

There may be software release to upgrade features of the radio from time to time. Check the update regularly to keep your radio up to date with the latest software.

Do not do any operation during the upgrade progress!!! Or the radio will be damaged!

Telescopic antenna assist Middle Wave

An auxiliary middle wave receiving circuit is integrated in the radio, you can try to use the telescopic antenna to increase the MW signal strength and to improve the performance of SNR,especially effective outdoor.

About medium-wave

1. This radio is equipped with a built-in ferrite bar MW antenna, and also has a telescopic antenna to assist in MW reception. When receiving medium waves, you can try to extend the telescopic antenna to improve the reception capability.
2. This radio can be connected to an external antenna. You can use a 3.5mm headphone jack and a longer wire to modify it into an external antenna, which helps in receiving medium and short waves and FM. It is important to note that any pin of the 3.5mm jack can serve as a signal pin, allowing you to design your own external antenna. However, it does not support connecting to active MW antennas.

Q: Why is the medium-wave reception performance relatively weak?
A:Due to the interference of LCD, the medium wave reception performance of this radio is indeed a bit weak. You can pull out the telescopic antenna to enhance the reception performance of MW (we have designed a circuit to enhance the reception of MW with telescopic antenna), or try it outdoors to see if the medium wave reception of this radio is really defective. Indoors, we still recommend connecting to Wi-Fi to listen to online radios.

How to adjust the meter band and bandwidth

1. The first knob of the radio is used to adjust the meter band. In the SW playback interface, simply press the middle position of the first knob once. When you see the meter band value blinking, you can adjust the meter band by turning the knob.
2. The second knob of the radio is used to adjust the bandwidth. In the SW/MW playback interface, simply press the middle position of the second knob once.

When you see the bandwidth value blinking, you can adjust the bandwidth by turning the knob.

Trouble shooting

Problem	Solutions
Connect to the network successfully, but unable to play particular stations	The station is not broadcasting at this time of the day, remember it maybe located in a different time zone. The station has too many people trying to attach to. The station server capacity is not large enough. The internet connection between the radio and the radio station server is too slow or unstable to support the date rate of broadcast. The link of the radio is out of the date, please contact us to update the station list. This radio only supports 2.4G Wi-Fi and does not support 5G Wi-Fi. Check the encryption protocol of the router, as this radio only supports WPA/WPA2 and does not support WPA3. Currently, The Radio does not support Wi-Fi extenders
The unit got freeze or no response	Forced restart the radio, Press the ( ) and hold for 5 seconds until the radio restarted (show white screen),then release the button.
The radio screen is black and no response, regardless of any button operation/charging	Hold down the power button for 30 seconds, release it, then hold down the power button again for 5 seconds until the screen lights up, and then release it. The machine should now be functioning normally. If it still doesn't work, please check if the battery need charging
Can not connect to Wi-Fi network	Confirm that the Wi-Fi can access the internet (i.e.can browse the web) using the same network.
Insufficient Wi-Fi signal strength	Check the distance to router, see if a computer/mobile phone can connect to the network in this location, if the signal is weak, please optimize the distance of the router's location.

Product specification

Important function tips

How to connect Wi-Fi?
Press ( ) button into the Wi-Fi setting page. Choose the Wi-Fi that you want to connect, then input the password. Rotate the Multifunctional knob to select the desired character. Press the knob to input the selected character. Until all password characters are entered. Press the OK button to confirm and enter the password. Use ( ) to shift input method.(abc/ABC). You need to restart the radio to remember the password.

How to add internet radio website?
Press ( ) 'Add radio', will come out a QR Code. Use any QR Scan app on your phone, then type the website you want to listen.

More details and operation tips, please check our instruction videos on Youtube:
https://www.youtube.com/@choyongradio

24 hour service Team please contact:
choyongradio@gmail.com
Official website URL:
www.choyongradio.com

Location of Controls

1. ON/OFF
   Press 2 seconds to turn the radio ON/OFF, press 5 seconds till the white screen appeared to force restart the radio.
   1. Received the radio and found that it had no power, what should you do
      To meet the requirements of air transportation, the voltage of the 18650 battery should not exceed 3.65V. The battery voltage of the radio you received is relatively low. I suggest you charge it for a while before using it. Due to the actual capacity of the battery being about 5400mAh, it will require a longer charging time. It's recommended that you charge it before going to bed at night, so that the radio will be fully charged the next morning.
2. FM mode
   A short press to enter FM mode. Press and hold 2 seconds to turn on FM ATS(Auto Searching and save) function.
3. MW mode/LW mode
   First short press to enter MW mode. In MW mode, press and hold 2 seconds to turn on MW ATS(Auto Searching and save) function.
   If the radio is in MW mode, another short press will enter LW(Long Wave)mode, press and hold 2 seconds to turn on LW ATS(Auto Searching and save) function.
4. SW mode
   A short press to enter SW mode. Press and hold 2 seconds to turn on SWATS(Auto Searching and save) function.
5. Bluetooth mode
   A short press to enter Bluetooth mode, the radio will work as a Bluetooth speaker.
6. TF card mode
   A short press to enter TF card mode. The radio need to restart after the F-Card inserted.
7. Tag button
   Press this key to choose different internet radio stations by tag like POP/NEWS/MUSIC/ROCK...
8. Menu button
   Press Menu button to open the main menu.
   1. SSB+/SSB-
      Press the Menu key to display the menu, find SSB+ (USB) or SSB- (LSB) in the menu, and enter the frequency you want to listen to through the keyboard with a precision of 1KHz(For example, you can enter: 14270, but you cannot enter: 14270.20); You can adjust the frequency of SSB through the knob, the main knob has a step value of 1KHz, and the Fine Tuning has a step value of 10Hz.
   2. Voice Search Radio
      Press the "Menu "key to display the menu, find the "Search" menu, after entering the "Search" function, long press the "Lang" key according to the prompt, when the Mic icon starts flashing, you can say to the machine: "I want to listen to BBC radio" or "Play VOA radio", then you can choose the stations you want to listen to from the displayed list. You can also activate the voice search function by long pressing the "Lang" button.
9. Language mode
   Press this key to choose different internet radio stations by language like German, French, English etc..
10. Lock button
    Press this key to lock the keypad and the knob, press again to unlock the keypad.
11. Clock alert
    Press this button to set the alarm clock, the scheduled power on/off, and the play time limit.
12. Set UP
    Press this key to enter the settings menu.
13. History
    Press this key you will see the record of the radio stations you have listened.
14. Favorites
    While playing, press this key to bookmark your favorite radio stations, When not playing press this key to view your favorite stations.
15. Confirm button
    Press this button to confirm what you choose.
16. Music stations shortcut key
    Press this key will present a list of internet radio stations labeled with music.
17. Podcast stations shortcut key
    Press this key will present a list of internet radio stations labeled with podcast.
18. News stations shortcut key
    Press this key will present a list of internet radio stations labeled with NEWS.
19. Add / Edit stations
    Press this key and follow the instructions you can add or edit the website of internet radio stations to local memory.
20. Number
    By pressing these buttons, you can input the radio frequency, the password of Wi-Fi, and the numbers of the music in TF-Card for direct tuning.
21. VF/VM button
    1. Switch Input Method when inputting Wi-Fi password.
    2. Switch the function of the tuning knob when working in regular radio mode, VF-Switch frequency, VM-Switch saved frequency.
22. Return button
    Press this key to return to the previous menu level
23. Previous
    Press this key to shift to previous Song/Channel.
24. Pause button
    Press this key to Pause/Replay.
25. Next
    Press this key to shift to next Song/Channel.
26. TF card slot
    After insert a TF-Card and restart the radio, you can play the music that you have prepared in TF-Card. Supports a maximum of 32 GB TF-Card.
    You can copy music to TF-Card or delete music by connecting the radio to a computer.
27. SIM card slot
    Support Nano Sim Card, you need to restart the radio after insert SIM-Card.
28. Multifunctional knob
    1. In regular radio mode use for tuning frequency by steps(FM 100KHz, MW 9/10KHz, SW 5KHz);A short press during playing will turn on the meter-band selection interface.
    2. In VM Mode use for switching saved frequency.
    3. In internet radio mode use for switching internet radio stations.
    4. A short press to confirm.
    5. In main menu interface use to select and confirm.
29. Fine tuning knob
    1. In regular radio mode use for tuning frequency by fine steps(FM 10KHz, MW 1KHz, SW 1KHz);
    2. In favorite regular radios interface use for switching favorite radios.
    3. A short press during regular radio playing will adjust the receiving bandwidth.
30. Volume control with switch
    Turing to increase or decrease volume.
    Rotate counter-clockwise until hear a 'click' sound, the radio will enter sleep mode. turn on the volume switch the machine will continue to play.
31. External antenna jack
    Supports external antenna with a 3.5mm interface., both active and passive antennas can be used.

Documents / Resources

References

• Choyong Radio - YouTube
• ChoYong Radio 2024

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