User's Manual

Table Of Contents

4-inch Visible Light Terminal

User Manual

13 Autotest

On the Main Menu, tap Autotest to automatically test whether all modules in the device function

properly, which include the LCD, Voice, Camera and Real-Time Clock (RTC).

Function Description

Function Name

Description

Test All

To automatically test whether the LCD, Audio, Camera and RTC are normal.

Test LCD

To automatically test the display effect of LCD screen by displaying full-

color, pure white, and pure black to check whether the screen displays

colors normally.

Test Voice

automatically test whether the audio files stored in the device are

complete and the voice quality is good.

Microphone test

Check whether the microphone is working by speaking to microphone and

playing the microphone recording.

Test Face

To test if the camera functions properly by checking the photos taken to see

if they are clear enough.

Test Clock RTC

To test the RTC. The device tests whether the clock works normally and

accurately with a stopwatch. Tap the screen to start counting and press it

again to stop counting.