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REVISED HISTORY
DATE ISSUE CONTENTS OF CHANGES S/W VERSION
13/MAY/2003 ISSUE 0.1 Initial Release
01/Sep./2003 ISSUE 0.2




The information in this manual is subject to change without notice and should not be construed as
a commitment by LGE Inc. Furthermore, LGE Inc. reserves the right, without notice, to make
changes to equipment design as advances in engineering and manufacturing methods warrant.

This manual provides the information necessary to install, program, operate and maintain the
G5500/7050.




-1-
Table of Contents
1. INTRODUCTION.................................. 5
4.14 Earphone Trouble .............................
76
1.1 Purpose ................................................ 5 4.15 Infrared Data Association Trouble ...... 81
1.2 Regulatory Information .......................... 5 4.16 Camera Trouble ...............................
84
1.3 Abbreviations ......................................... 7


2. General Performance ........................ 8 5. ASSEMBLY INSTRUCTION .............102

2.1 Product Name .......................................8 5.1 Disassembly (G5500) .............................
102
2.2 Supporting Standard ..........................8 5.2 Disassembly (G7050) ........................108
2.3 Main Parts .......................................8
2.4 H/W Features .................................. 9
2.5 S/W Features ..................................11 6. DOWNLOAD .................................114
6.1 Download Setup .....................................
114
3. H/W Circuit Description ....................13 6.2 Download Procedure ..........................
115

3.1 RF Transceiver General Description ......
13
3.2 Receiver Part ..................................13
3.3 Digital Baseband (DBB) Processor .........
20 7. SERVICE AND CALIBRATION ........ 122
3.4 Analog Baseband (ABB) Processor .........
25
122
7.1 Service S/W ..........................................
3.5 Camera Circuit ...................................
44
125
7.2 Calibration .......................................


4. TROUBLE SHOOTING ................... 51
4.1 Main Components Placement(G5500) ...
51 8. CIRCUIT DIAGRAM ......................... 129
Main Components Placement(G7050) ...52
8.1 BB ...................................................129
4.2 Main Components ..................................
53
8.2 MEMORY, etc. ..................................
130
4.3 Keypad Components Placement ............
54
8.3 MIDI, AUDIO ...................................
131
4.4 Baseband Components ......................55
8.4 I/O, Connector ................................132
4.5 Power On Trouble ...............................
56
8.5 RF ................................................
133
4.6 Charging Trouble ..................................57
8.6 CAMERA .......................................
134
4.7 LCD Display Trouble .............................
59
8.7 KEYPAD ........................................
135
4.8 Receiver Trouble .................................61
4.9 Microphone Trouble ...........................
65
4.10 Vibrator Trouble ...............................68
9. PCB LAYOUT ................................. 137
4.11 Keypad Backlight Trouble ...................
70
4.12 Slide Open/Close Trouble ...................
72
4.13 SIM Detect Trouble ............................
74

-3-
Table of Contents
10. ENGINEERING MODE ................... 141


11. STANDALONE TEST ..................... 142

142
11.1 Setting Method .....................................



12. EXPLODED VIEW &
REPLACEMENT PART LIST.......... 143
143
12.1 Exploded View .....................................
145
12.2 Accessory ......................................
12.3 Replacement Parts
146
....................
Replacement Parts
148
...........................




-4-
1. Introduction

1.1 Purpose
This manual provides the information necessary to repair, calibration, description and download the
features of the G5500/7050.


1.2 Regulatory Information

A. Security
Toll fraud, the unauthorized use of telecommunications system by an unauthorized part (for example,
persons other than your company's employees, agents, subcontractors, or person working on your
company's behalf) can result in substantial additional charges you're your telecommunications
services. System users are responsible for the security of own system. There are may be risks of toll
fraud associated with your telecommunications system. System users are responsible for
programming and configuring the equipment to prevent unauthorized use. LGE does not warrant that
this product is immune from the above case but will prevent unauthorized use of common-carrier
telecommunication service of facilities accessed through or connected to it. LGE will not be
responsible for any charges that result from such unauthorized use.



B. Incidence of Harm
If a telephone company determines that the equipment provided to customer is faulty and possibly
causing harm or interruption in service to the telephone network, it should disconnect telephone
service until repair can be done. A telephone company may temporarily disconnect service as long as
repair is not done.


C. Changes in Service

A local telephone company may make changes in its communications facilities or procedure. If these
changes could reasonably be expected to affect the use of the G5500/7050 or compatibility with the
network, the telephone company is required to give advanced written notice to the user, allowing the
user to take appropriate steps to maintain telephone service.

D. Maintenance Limitations

Maintenance limitations on the G5500/7050 must be performed only by the LGE or its authorized
agent. The user may not make any changes and/or repairs expect as specifically noted in this manual.
Therefore, note that unauthorized alternations or repair may affect the regulatory status of the system
and may void any remaining warranty.




-5-
E. Notice of Radiated Emissions
The G5500/7050 complies with rules regarding radiation and radio frequency emission as defined by
local regulatory agencies. In accordance with these agencies, you may be required to provide
information such as the following to the end user.

F. Pictures
The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly
different.

G. Interference and Attenuation

An G5500/7050 may interfere with sensitive laboratory equipment, medical equipment, etc.
Interference from unsuppressed engines or electric motors may cause problems.

H. Electrostatic Sensitive Devices




ATTENTION
Boards, which contain Electrostatic Sensitive Device (ESD), are indicated by the sign.
Following information is ESD handling: