Trace Option [Menu 4]; Call Timer [Menu 5]; Fact. Reset [Menu 6]; S/W Version [Menu 7] - LG C3400 Service Manual

9. ENGINEERING MODE
9.3.5 LCD
1)LCD
Main LCD screen resolution tests horizontally and vertically one by one and fills the screen.
2)SubLCD
Sub LCD screen resolution tests horizontally and vertically one by one and fills the screen.
9.3.6 Key pad
When a pop-up message shows 'Press Any Key', you may press any keys including side
keys, but not [Soft2 Key]. If the key is working properly, name of the key is displayed on the
screen. Test will be completed in 15 seconds automatically.
9.3.7 MicSpk Test
The sound from MIC is recorded for about 3 seconds, then it is replayed on the speaker
automatically.
9.3.8 Camera
Camera preview function is activated on Main LCD screen.

9.4 Trace option [MENU 4]

This is NOT a necessary menu to be used by neither engineers nor users.

9.5 Call timer [MENU 5]

This menu is to set the Digital Audio Interface Mode for Speech Transcoder and Acoustic testing.
1) All calls : This displays total conversation time. User cannot reset this value.
2) Reset settings : This resets total conversation time to this, [00:00:00].

9.6 Fact. Reset [MENU 6]

This Factory Reset menu is to format data block in the flash memory and this procedure set up
the default value in data block.
Attention
x Fact. Reset (i.e.Factory Reset) should be only used during the Manufacturing process.
y Servicemen should NOT progress this menu, otherwise some of valuable data such as Setting
value, RF Calibration data, etc. cannot be restored again.
9.7 S/W version
This displays software version stored in the phone.
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