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Huawei u8800 User Manual
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U8800 Maintenan
ce Manual Basic Version V1.1
Internal
201
1-03-2
1
Huawei confidential.
No spreading with
out permission.
Page 37 of 61
9.4
light Sensor Failure
Reference Figure 9-3
Figure9-3
D601&
D603
Infrared Emitting
Diode
/
U601 VREG_L10
2.7V
36
38
Table of Contents
Default Chapter
3
Table of Contents
3
1 Product Introduction
5
Product Appearance
5
Product Specifications
5
2 Maintenance Instructions
7
Document Application
7
Maintenance Precautions
7
Maintenance Information Direction
7
3 Explosive View of the Whole Unit
8
4 Location of Components on the Main Board
10
5 Software Upgrade
14
Upgrade Preparation
14
Normal Upgrade Process
14
Force Upgrade Process
15
Check Firmware Version
17
Error Handling
17
6 Maintenance Tools
18
7 Disassembly Process
20
8 Assembly Process
26
9 Troubleshooting of Common Failures
32
Principle Instruction
32
No Power on
33
No Power On--Small Current
34
Charge Failure
36
Light Sensor Failure
37
Sim Card Failure
38
Tf Card Failure
39
Display Failure
39
Touch Panel Failure
41
Audio Failure
41
No Ring Tone
41
Voice Transmitting Failure
44
Receiver Failure
44
Earphone&Tv out Failure
45
Camera Failure
46
Vibration Failure
47
Wifi &Bt Failure
48
Gps Failure
49
Accelerometer & Electronic Compass Failure
50
Rf Receiving Failure
51
RF Receiving Failure-Wcdma900Mhz
51
RF Receiving Failure-Wcdma2100Mhz
53
RF Receiving Failure-GSM850&900
54
RF Receiving Failure-GSM1800&1900
54
Rf Transmitting Failure
56
RF Transmitting Failure-Wcdma900Mhz
56
RF Transmitting Failure-Wcdma2100Mhz
58
RF Transmitting Failure-GSM
59
10 Functional Test
60
MMI Test
60
Voice Call Test
61
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Huawei u8800 Specifications
General
Brand
Huawei
Model
u8800
Category
Cell Phone
Language
English
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