U9200 Maintenance Manual
INTERNAL
(2012-06-13)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Page 77 of 80
10 Functional Test
10.1 Keypad Introduction
Figure 10-1
U9200 keypad
Generally, a smartphone has only a few keys. The U9200 has six keys, including three
Android system keys on the touchscreen, a power key, volume up key, and volume down key.
The U9200 battery cannot be replaced; therefore, the power key is designed with a forcible
power-off function. To power off the phone, press the power key for 10 seconds, which
facilitates the software upgrade.
10.2 MMI Test
Enter
*#*#2846579#*#*
, and select
MMI Test_II
. The LCD displays "Starting MMI test".
Press the volume down key to start the MMI test. If a test item fails, touch the Menu key to
end the current test, press the volume down key to enter the next test, and press the back key
to return to the previous test. If one test is complete, press the volume down key to proceed to
the next test. The following table lists the test items.
Power
key
Volume
up key
Menu key
Back key
Home key
Volume
down key
