User's Manual

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DP750/DP720 User Guide
Factory Functions
The factory functions include the following diagnosticoptions:
- LCD Diagnostic
- LCD ON / OFF
- Audio Loopback
- Diagnostic Mode
1. Press Menu (left soft key or the selection key ) to bring up operation menu.
2. Use Navigation keys to reach Settings menu
3. Navigate to select Factory Functions and choose which diagnostic, you need to perform, and
then press Select (left soft key ).
- For Diagnostic Mode
All LEDs will light up. All keys’ name will display in red on LCD screen before diagnosing.
Press any key on the keypad to diagnose the key’s function. When done, the key’s name
will display in blue on LCD with a prompt message (PASS).To exit press Back (Right soft
key)
- Audio Loopback
Speak to the phone using speaker/handset/headset. If you can hear your voice, your
audio is working fine. Press Back (left soft key) to exit audio loopback mode.
- LCD ON / OFF
Selects this option to turn off LCD. Press any button to turn on LCD.
- LCD Diagnostic
Enters this option and press Left/Right Navigation key to do LCD Diagnostic (you will
notice that the color of the LCD will be changing). Pressright soft keyto quite.
Figure 23: Factory Functions