LG CT815 Service Manual page 189

11. TEST MODE
Item
(7) Gyro Sensor
Test
Item
(8) Approach
Sensor Test
LGE Internal Use Only
Order
Tab Start Button
1)
2)
3)
IF OK, tab "YES"
button
Order
Tab Start Button
IF OK, tab "YES"
button
Description
Rotate the device
Character "G" is moved
Rotate again and wait for a while
Description
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Only for training and service purposes