About K20

With the development of science and technology, in the current Bluetooth function, it is no longer used for Bluetooth to transfer files. The role of Bluetooth is only to transmit sound. The Bluetooth file transfer function has been replaced by APP.

Wifi, Bluetooth, wifi-display (airplay, Miracast, DLNA) are all different functions. The effects are different.

 

Many buyers often misunderstand the function of Bluetooth. For example: the following 3 types are different functions.

 

  

1. wifi-display function, the projector displays the image and sound of the mobile phone screen through the mirroring function of the smartphone. This is not achieved using the Bluetooth function. It is achieved through the screen mirroring function that comes with the phone.

 

1-1. ios smartphone realizes screen mirroring via projector’s Airscreen app

 

Operation instruction video connection: https://youtu.be/8odfosOos28

 

1-2. Android smartphones realize screen mirroring via projector’s mcast app

 

Operation instruction video connection: https://youtu.be/TYXz5Nyj62c

 

Note: Not all Android smartphones support the screen mirroring function. For smartphones that support screen mirroring, there are options similar to this in the "Settings" or "More Functions" options of the smartphone, for example: "Screen mirroing", "Wifi-display", "multi-screen", "screen projection", "play to", "media output", etc.


If the projector's pre-installed screen mirroring app is not compatible with your Android smartphone, you can also download and install Airscreen, happycast and other apps that support wifi-display on the projector.


Tips：

Some video apps with copyright protection cannot support wireless projection from other devices to the projector. For example, Netflix, iTunes Movie, Google Movie, Amazon Prime do not support this function on some smartphone and computers. All Android system projectors on the market are the same.



1. K20 Smart Version, How to read PDF, PPT and word documents in USB flash driver?


You need to download WPS or office app in the app store

You can also click the icon below to download the WPS installation package, copy it to the USB flash disk, insert the USB flash disk into the projector, open the file management of the projector, find the installation package of "WPSMoffice. APK", and install it.


"WPS.apk" Download website: https://drive.google.com/drive/folders/1pDETO_vReR-kH5G3Gp2RCbmWQqTxz9sL?usp=sharing

How to operate WPS APP to read PPT, Word? Operation instruction video: https://youtu.be/d7vQcDbeWRg




WPS APK download

2. How to connect a windows system computer to the projector via HDMI cable?


       Operation instruction video connection: https://youtu.be/HynW24G6gBM


3. How to connect a macbook computer to the projector via HDMI cable?


Operation instruction video connection: https://youtu.be/5ooTcvK4RLI


4. K20 Smart Version, How to solve Fire TV stick 4K connected to the projector to play movies no sound？


Turn off Dolby in the setting sound of Fire TV stick 4K.

         Step："setting"----"display&Sound"---"Audio"---"Dolby digital output"---"Dolby digital plus OFF", Turn off Dolby，Do it a few times，Confirm whether Dolby is successfully turned off.

         Tips: Some sources can work normally without turning off Dolby and setting them to automatic mode. If there is still no sound in automatic mode, you must turn off Dolby.

         Operation video guide：https://youtu.be/2S77xzLHC84





​​K20 Series Projector Maintenance Guide


1. If the projected image is displayed abnormally on the new projector, you can disassemble the projector and reconnect the cable between the LCD and the motherboard


Operation instruction video connection: https://youtu.be/MsCnwh_634c


2. If the projected image has a lot of dust and black spots, you can disassemble the projector to clean up the dust on the LCD surface inside the projector


Operation instruction video connection: https://youtu.be/QWDHor988ck


If there is a lot of dust blocking the projector's air inlet, please clean up the dust from the projector in time to prolong the service life of the projector.



3. There are one or a few small dust black spots on the projector screen, you can clean the dust on the LCD from the dust removal hole at the bottom of the projector


Operation instruction video connection: https://youtu.be/3IstOVZOw3I


4. K20 projector disassembly video (replacement of main board, power board, LCD, heat insulation glass, fan, reflector, etc. instruction video)


Operation instruction video connection: https://youtu.be/dBQSD_RXs3I