LG GB210 User manual

Service Manual Model : GB210
Internal Use Only
Service Manual
GB210
Date: January, 2009 / Issue 1.0

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Table Of Contents
1. INTRODUCTION............................................... 5
1.1 Purpose...................................................................... 5
1.2 Regulatory Information................................................. 5
1.3 Abbreviations .............................................................. 7
2. PERFORMANCE............................................... 9
2.1 H/W Features.............................................................. 9
2.2 Technical Specification (GB210).................................. 11
3. TECHNICAL BRIEF......................................... 15
3.1 SKY77518 TX–RX iPAC™ FEM for Dual-Band
GSM/GPRS (SKY77518, U500) ..................................15
3.2 Transceiver (AD6548, U501) ...................................... 17
3.3 26 MHz Clock (Crystal, X500)..................................... 19
3.4 BT Module with integrated FM tuner(BC5-FM, U200)... 20
3.5 Baseband Processor (AD6726, U103)......................... 21
3.6 Display and Interface ................................................. 27
3.7 Camera Interface(AIT716 , U400) ............................... 29
3.8 Keypad Switches and Scanning.................................. 32
3.9 Microphone............................................................... 33
3.10 Main Speaker.......................................................... 34
3.11 Headset Interface .................................................... 35
3.12 Key Back-light Illumination....................................... 36
3.13 LCD Back-light Illumination ...................................... 37
3.14 VIBRATOR ............................................................... 38
3.15 Battery Charging ..................................................... 39
4. TROUBLE SHOOTING..................................... 40
4.1 RF Component .......................................................... 40
4.2 RX Trouble ................................................................ 41
4.3 TX Trouble................................................................. 46
4.4 Bluetooth + FM Radio................................................ 52
4.5 Power On Trouble ...................................................... 55
4.6 Charging Trouble ....................................................... 57
4.7 Vibrator Trouble ......................................................... 60
4.8 LCD Trouble .............................................................. 62
4.9 Camera Trouble......................................................... 65
4.10 Speaker Trouble ...................................................... 68
4.11 SIM Card Interface Trouble ....................................... 70
4.12 Earphone Trouble..................................................... 72
4.13 KEY backlight Trouble .............................................. 74
4.14 Receiver Trouble...................................................... 76
4.15 Microphone Trouble ................................................. 78
4.16 RTC Trouble ............................................................ 80
4.17 Micro SD Trouble..................................................... 82
5. Download ..................................................... 84
5.1 Download.................................................................. 84
6. BLOCK DIAGRAM.......................................... 90
7. CIRCUIT DIAGRAM........................................ 91
8. BGA Pin Map ................................................ 97
9. PCB LAYOUT ............................................... 101
10. STAND ALONE TEST.................................. 103
10.1 Introduction........................................................... 103
10.2 Setting Method...................................................... 103
10.3 Means of Test........................................................ 104
11. AUTO CALIBRATION.................................. 106
11.1 Overview............................................................... 106
11.2 Equipment List ...................................................... 106
11.3 Test Jig Operation.................................................. 107
11.4 Procedure............................................................. 108
11.5 AGC...................................................................... 110
11.6 APC...................................................................... 110
11.7 ADC...................................................................... 110
12. EXPLODED VIEW & REPLACEMENT
PART LIST ................................................. 111
12.1 EXPLODED VIEW ................................................... 111
12.2 Replacement Parts ................................................ 113
12.3 Accessory ............................................................. 129

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
1. INTRODUCTION
1.1 Purpose
This manual provides the information necessary to repair, calibration, description and download the features of
this model.
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. The manufacturer 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.
The manufacturer 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 this phone 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 this model must be performed only by the manufacturer 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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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1. INTRODUCTION
E. Notice of Radiated Emissions
This model 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
Phone 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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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
1.3 Abbreviations
For the purposes of this manual, following abbreviations apply:
Offset Phase Locked LoopOPLL
Light Emitting DiodeLED
Low Drop OutputLDO
Liquid Crystal DisplayLCD
Intermediate FrequencyIF
International Portable User IdentityIPUI
Global System for Mobile CommunicationsGSM
General Purpose Interface BusGPIB
Gaussian Minimum Shift KeyingGMSK
Flexible Printed Circuit BoardFPCB
Electrostatic DischargeESD
Electrical Erasable Programmable Read-Only MemoryEEPROM
Digital Signal ProcessingDSP
dB relative to 1 milli wattdBm
Digital Communication SystemDCS
Digital to Analog ConverterDAC
Constant Current – Constant VoltageCC-CV
Bit Error RatioBER
BasebandBB
Automatic Power ControlAPC

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1. INTRODUCTION
Wireless Application Protocol
WAP
Voltage Control Temperature Compensated Crystal OscillatorVCTCXO
Voltage Controlled OscillatorVCO
Universal Asynchronous Receiver/TransmitterUART
Time Division Multiple AccessTDMA
Time Division DuplexTDD
Travel AdapterTA
Side Tone Masking RatingSTMR
Pseudo SRAMPSRAM
Static Random Access MemorySRAM
Sending Loudness RatingSLR
Subscriber Identity ModuleSIM
Surface Acoustic WaveSAW
Real Time ClockRTC
Root Mean SquareRMS
Receiving Loudness RatingRLR
Radio FrequencyRF
Public Switched Telephone NetworkPSTN
Phase Locked LoopPLL
Programmable Gain AmplifierPGA
Printed Circuit BoardPCB
Power Amplifier ModulePAM

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2. PERFORMANCE
2.1 H/W Features
Item Feature Comment
Standard Battery Li-ion, 3.7V 1100mAh
Talk time Up to 240min : GSM Tx Level 7
Stand by time Up to 350 hours (Paging Period: 5, RSSI: -85 dBm)
Charging time Approx. 3 hours
RX Sensitivity -102dBm
TX output power GSM900 : 32.5dBm(Level 5),
DCS : 29.5dBm(Level 0)
SIM card type 3V
Display MAIN : TFT 128 ×160 pixel 262K Color
Status Indicator
Hard icons. Key Pad
0 ~ 9, #, *, Up/Down/Left/Right/Ok Navigation Key
Menu Key, Clear Key, Confirm Key, Send Key , PWR Key,
ANT Internal
EAR Phone Jack Yes (Stereo)
PC Synchronization Yes
Speech coding EFR/FR/HR
Data Yes
GPRS compatibility Class 10
Vibrator Yes
Loud Speaker Yes
Voice Recoding Yes
Microphone Yes

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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
Travel Adapter Yes
Speaker/Receiver Receiver 11X 07, Speaker : 16*16
MIDI 32poly SW MIDI
Item Feature Comment
Camera 1.3M

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2. PERFORMANCE
Not support
EDGE
Max. Power
5
±5dB0 dBm15±3dB16 dBm7
±5dB2 dBm14±3dB18 dBm6
±4dB4 dBm13±3dB20 dBm5
±4dB6 dBm12±3dB22 dBm4
±4dB8 dBm11±3dB24 dBm3
±4dB10 dBm10±3dB26 dBm2
±4dB12 dBm9±3dB28 dBm1
±3dB14 dBm8±2dB30 dBm0
Toler.PowerLevelToler.PowerLevel
DCS1800/PCS1900
±3dB19 dBm12
±5dB5 dBm19±3dB21 dBm11
±5dB7 dBm18±3dB23 dBm10
±5dB9 dBm17±3dB
25 dBm9
±5dB11 dBm16±3dB27 dBm8
±3dB13 dBm15±3dB29 dBm7
±3dB15 dBm14±3dB31 dBm6
±3dB17 dBm13±2dB33 dBm5
Toler.PowerLevelToler.PowerLevel
GSM850/EGSM900
Power Level4
< 0.1ppmFrequency Error3
Peak < 20 degrees
RMS < 5 degrees
Phase Error2
Frequency Band1
SpecificationDescriptionItem
Not support
EDGE
Modulation Accuracy
6
▶GSM850
TX: 824 + 0.2 x (n-127) MHz
RX: 869 + 0.2 x (n-127) MHz ( n = 128 ~ 251 )
▶GSM900
(EGSM)
TX: 890 + (n-1024) ×0.2 MHz
RX: 935 + (n-1024) ×0.2 MHz (n=975~1024)
(PGSM)
TX: 890 + (n-1024) ×0.2 MHz
RX: 935 + (n-1024) ×0.2 MHz (n=1~124)
▶DCS1800
TX: 1710 + (n-512) ×0.2 MHz
RX: 1805 + (n-512) ×0.2 MHz (n=512~885)
▶PCS1900
TX: 1810 + (n-512) ×0.2 MHz
RX: 1905 + (n-512) ×0.2 MHz (n=512~885)
2.2 Technical Specification (GB210)