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SERVICE MANUAL
MODEL : G5200 / W5200
GSM Phone
SERVICE MANUAL
MODEL : G5200/W5200
P/N : MMBD0015801 JUNE, 2002
Table Of Contents
1. INTRODUCTION.......................................4 3.10 Display and Interfaces ........................28
3.11 Keypad Switches and Scanning ..........29
1.1 Purpose ..................................................4
3.12 Microphone .........................................30
1.2 Regulatory Information .......................... 4
3.13 Earpiece ............................................. 31
A. Security ..............................................4
3.14 Hands-free Interface .......................... 32
B. Incidence of Harm ..............................4
3.15 Headset Jack Interface .......................32
C. Changes in Service ............................4
3.16 Key Back-light Illumination ..................32
D. Maintenance Limitations ....................4
3.17 LCD Back-light Illumination ................ 33
E. Notice of Radiated Emissions .............5
3.18 Multi-Color LED Illumination .............. 33
F. Pictures ..............................................5
3.19 Speaker & MIDI IC ............................. 34
G. Interference and Attenuation .............5
H. Electrostatic Sensitive Devices ..........5
4. TROUBLE SHOOTING ..................... 35
1.3 Abbreviations ......................................... 6
4.1 RF Components ................................. 35
2. PERFORMANCE .....................................8 4.2 Tx Trouble .......................................... 44
4.3 Power on Trouble ............................... 60
2.1 H/W Feature ...........................................8
4.4 Charging Trouble ............................... 62
2.2 Technical Specification .......................... 9
4.5 LCD Trouble ....................................... 64
3. TECHNICAL BRIEF ............................ 13 4.6 Receiver Trouble . ............................... 66
4.7 Speaker Trouble ................................. 69
3.1 General Descreption ............................ 13
4.8 Mic Trouble ..........................................72
3.2 Receiver ............................................... 13
4.9 Vibrator Trouble ................................. 75
A. RF front end .....................................14
4.10 Backlight Trouble ............................. 77
B. Demodulator and
baseband processing ...................... 14 4.11 Folder on/off Trouble ........................ 79
C. DC Offset Compensation ................ 14 4.12 SIM Detect Trouble .......................... 81
3.3 Transmitter Part ................................... 15 4.13 Earphone Trouble ............................ 83
A. IF Modulator .................................... 15 4.14 HFK Trouble ..................................... 87
B. OPLL ............................................... 16
5. ASSEMBLY INSTRUCTION ............ 95
C. Synthesizer ......................................16
D. TX APC Part ....................................17 5.1 Disassembly ....................................... 95
E. Power Amplifier ................................17
3.4 13 MHz Clock ...................................... 18 6. DOWNLOAD ....................................... 102
3.5 Power Supplies and Control Signals ....18 6.1 Download Setup ............................... 102
3.6 Digital Main Processor ......................... 19 6.2 Download Procedure ........................ 103
3.7 Analog Main Processor ........................ 24
3.8 Power Management ..............................26
3.9 Memories ..............................................28
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7. BLOCK DIAGRAM ............................. 106 12. AUTO CALIBRATION ................... 121
7.1 Main Board ....................................... 106 12.1 Overview ....................................... 121
7.2 FPCB ................................................ 107 12.2 Requirements ............................... 121
7.3 RF .................................................... 107 12.3 Menu and settings ........................ 121
12.4 AGC .............................................. 123
8. CIRCUIT DIAGRAM ........................... 109 12.5 APC .............................................. 123
8.1 Baseband Interface .......................... 109 12.6 ADC .............................................. 123
8.2 MIDI .................................................. 110 12.7 Setting .......................................... 123
8.3 KYE, I/F & LCD CON ....................... 111 12.8 How to do calibration .................... 123
8.4 RF .................................................... 112
13. EXPLODED VIEW &
9. PCB LAYOUT ..................................... 113 REPLACEMENT PART LIST ...... 124
13.1 Exploded View .............................. 124
10. ENGINEERING MODE .................. 115 13.2 Accessories .................................. 126
10.1 BB Test [MENU 1] ........................ 115 13.3 Replacement Part List .................. 127
10.2 RF Test [MENU 2] ........................ 117
10.3 MF Mode [MENU 3] ...................... 118
10.4 Trace option [MENU 4] ................. 119
10.5 Call Timer [MENU 5] ..................... 119
10.6 Fact. Reset [MENU 6] ................... 119
10.7 S/W version [MENU 7] .................. 119
11. STAND ALONE TEST ................... 120
11.1 Introduction ................................... 120
11.2 Setting Method ............................. 120
11.3 Means of Test ............................... 120
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REVISED HISTORY
DATE ISSUE CONTENTS OF CHANGES S/W VERSION
APRIL/2002 ISSUE 1 Initial Release
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
G5200.
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1. INTRODUCTION
1. INTRODUCTION
1.1 Purpose
This manual provides the information necessary to repair, calibration, description and download the
features of the G5200.
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 for 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 G5200 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 G5200 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.
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1. INTRODUCTION
E. Notice of Radiated Emissions
The G5200 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 G5200 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:
Service personnel should ground themselves by using a wrist strap when exchange system
boards.
When repairs are made to a system board, they should spread the floor with anti-static mat which
is also grounded.
Use a suitable, grounded soldering iron.
Keep sensitive parts in these protective packages until these are used.
When returning system boards or parts like EEPROM to the factory, use the protective package
as described.
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1. INTRODUCTION
1.3 Abbreviations
For the purposes of this manual, following abbreviations apply:
APC Automatic Power Control
BB Baseband
BER Bit Error Ratio
CC-CV Constant Current