57
abcdefghijklmnop --------> Indicates the expansion disk 1-16 button
qrstuvwxyz*#$%@! --------> Indicates the expansion disk 17-32 button
Click the 32 buttons on the expansion disk in turn, and the characters on the screen
will disappear accordingly. If you press a key and the character on the screen does not
disappear, there is a problem with the key. If all the characters disappear, there is no
problem with 32 keys.
- Lamp diagnosis
1. Operate on the phone, click
Menu->Settings->Basic Settings->Diagnosis-
>Extension Disk->Light
2. The screen display is as follows:
3. Press the
button repeatedly, the LED lights of the expansion module will light up
(when multiple expansion modules are cascaded, they will light up at the same time),
red, yellow and green lights, observe whether the button LED lights are off, dim, and
flashing when no operation is performed.
4.5.2.6 Expansion disk function description
