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U8655N
Huawei U8655N Manuals
Manuals and User Guides for Huawei U8655N. We have
1
Huawei U8655N manual available for free PDF download: Maintenance Manual
Huawei U8655N Maintenance Manual (72 pages)
Brand:
Huawei
| Category:
Cell Phone
| Size: 1.4 MB
Table of Contents
About this Document
3
Table of Contents
4
Product Introduction
6
Appearance
6
Specifications
6
Applicable Scope and Precautions
8
Applicable Scope
8
Precautions
8
How to Obtain Product and Repair Information
8
Exploded View
9
Components on the PCBA
11
Software Upgrade
13
Upgrade Preparation
13
Upgrade Procedure
13
Maintenance Tools
15
Disassembly Procedure
17
Assembly Procedure
22
Principles and Failure Analysis
26
Block Diagram
26
Function Description of the PCBA
27
Baseband Unit
30
Power-On Management Circuits
30
Charging Management Circuits
34
RF Unit
35
RF Failure
35
Gps
38
Wi-Fi/Bluetooth/Fm Module
38
Peripheral Circuits
39
Display
39
Camera
42
Usb
44
Headset Jack
45
Keys
47
Status Indicator and Touch Key Backlight Circuits
48
Battery Connector
49
Accelerometer
50
Proximity and Illuminance Sensor
50
Vibration Motor
52
Receiver
53
Microphone
55
Touchscreen Panel
56
SIM Card
57
Microsd Card
58
Nfc
59
Solder Points on the PCB and BGA Chip
64
Functional Tests
69
MMI Test
69
Voice Call Test
72
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