U9200 Maintenance Manual
INTERNAL
(2012-06-13)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Page 78 of 80
No. Item
Test Method and Procedure
1
Board test
This test usually is not displayed. If the CBD test was omitted on
the production line, the LCD displays a message indicating that
the board test fails.
2
microSD card
test
If the phone has a microSD card inserted, and the microSD card
functions properly, the system proceeds to the next test; otherwise,
the system displays "No microSD card".
3
Battery test
Check the battery voltage. If the battery charge level is lower than
3%, the voltage is larger than 4.2 V, or the battery temperature is
not within –200°F to +700°F, the LCD displays a message
indicating that the battery test fails.
4
Keypad test
The LCD displays the keypad. When a key is pressed, this key
turns purple; when it is released, it recovers to the original color.
LCD test
The LCD displays a white screen.
The LCD displays a black screen.
The LCD displays RGB strips.
The lightness of LCD backlight is enhanced gradually and then
cyclically.
6
Keypad LED
test
The keypad LED is lighted cyclically.
7
Rear camera
test
The LCD immediately displays the pictures taken by the camera.
Check whether the camera is of high performance by comparing
the picture quality and response speed. Press the volume up and
volume down keys concurrently to test the camera flash, and if the
flash does not light up, the flash is faulty.
8
Front camera
test
The LCD displays the pictures immediately taken by the camera.
Check whether the camera is of high performance by comparing
the picture quality and response speed.
9
Touchscreen
test
Touch the peripheral area of the touchscreen, and if the outer area
turns red, the test is successful.
10
Proximity
sensor test
Place the baffle plate above the receiver and 4 mm above the light
penetration hole, and if a phone image appears beside the head
image, the test is successful.
11
Ambient light
sensor test
Check whether the system records the data of ambient light and
whether the data changes as the ambient light changes.
12
Motor test
The motor vibrates periodically.
13
Speaker test
The speaker plays the ringtone. If a headset is inserted, the
ringtone is played from the headset receiver.
14
Receiver test
The speaker plays the ringtone. The ringtone is played from the
receiver.
