LG G7100 User manual

Table Of Contents
1. INTRODUCTION................................…5
1.1 Purpose ............................................….
1.2 Regulatory Information ..........................
1.3 Abbreviations .........................................
2. PERFORMANCE ..............................….9
2.1 H/W Feature .....................................…..
2.2 Technical Specification ..........................
3. TECHNICAL BRIEF ............................16
3.1 General Description of RF parts ......…..
3.2 Receiver Part ...................................….
3.3 Synthesizer Part …………………………
3.4 Transmitter Part ................................….
3.5 13 MHz Clock ...................................….
3.6 Power Supplies and Control Signals .….
3.7 Digital Main Processor ......................….
3.8 Analog Main Processor ......................…
3.9 Power Management IC .....................….
3.10 Memories ........................................... .
3.11 Display and Interface ......................... .
3.12 Keypad Switches and Scanning ........ .
3.13 Microphone ........................................ .
3.14 Earpiece .....................…………………
3.15 Hands-free Interface …………………..
3.16 Headset Jack Interface ...................….
3.17 Key Back-light Illumination ..............….
3.18 LCD Back-light Illumination ……………
3.19 Speaker & MIDI IC ..........................….
3.20 CAMERA IC …………………………….
4. TROUBLE SHOOTING ................… 53
4.1 RF Components .............................….
4.2 Rx Trouble ..........................................
4.3 Tx Trouble ..........................................
4.4 Power On Trouble ..........................….
4.5 Charging Trouble ...........................….
4.6 LCD Trouble .......................................
4.7 Receiver Trouble ................................
4.8 Speaker Trouble .................................
4.9 MIC Trouble ...................................….
4.10 Vibrator Trouble ...............................
4.11 Key Backlight LED Trouble ..............
4.12 Folder on/off Trouble ………………..
4.13 SIM Detect Trouble ..........................
4.14 Earphone Trouble ............................
4.15 HFK Trouble .....................................
4.16 CAMERA Trouble ……………………
5. DISASSEMBLY INSTRUCTION .... 110
5.1 Disassembly .......................................
6. DOWNLOAD AND
CALIBRATION ................................ 118
6.1 Download ......................................…..
6.2 Calibration .....................................…..
7. BLOCK DIAGRAM ........................... 128
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9
11
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19
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25
30
36
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95
100
106
110
118
125
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9. PCB LAYOUT .................................. 135
10. ENGINEERING MODE .................. 137
10.1 BB Test [MENU 1] .....................……
10.2 RF Test [MENU 2] .....................……
10.3 MF mode [MENU 3] ...................……
10.4 Trace option [MENU 4] ..............……
10.5 Call timer [MENU 5] ..................……
10.6 Fact. Reset [MENU 6] ................……
10.7 S/W version [MENU 7] ...............……
11. STAND ALONE TEST ................... 143
11.1 Introduction ................................……
11.2 Setting Method ..........................……
11.3 Means of Test ............................……
12. AUTO CALIBRATION ................... 146
12.1 Overview ....................................……
12.2 Requirements ............................……
12.3 Menu and Settings ........................…
12.4 AGC …………………………………..
12.5 APC …………………………………...
12.6 ADC ……………………………………
12.7 Setting …………………………………
12.8 How to do calibration .................……
13. EXPLODED VIEW &
REPLACEMENT PART LIST ...…. 149
13.1 Exploded View ...........................……
13.2 Accessory ...............................……..
13.3 Replacement Parts
< Mechanic component > ……………..
Replacement Parts
< Main component > ………………….
138
140
141
142
142
142
142
143
143
144
146
146
146
148
148
148
148
148
149
151
152
155
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8. CIRCUIT DIAGRAM ......................... 129
8.1 MAIN .............................................…..
8.2 Memory & MMI & PMIC ..........……….
8.3 MMI …............................................….
8.4 Audio ………..................................…..
8.5 Camera ……………………..………….
8.6 RF Circuit ………………………………
129
130
131
132
133
134

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.
1. INTRODUCTION
1. INTRODUCTION
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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.
1. INTRODUCTION
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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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1. INTRODUCTION

Wireless Application ProtocolWAP
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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1. INTRODUCTION

2. PERFORMANCE
2.1 H/W Features
Item Feature Comment
Standard Battery
Li-ion, 770 mAh
Size: 35 ×62 ×3.8mm
Weight: 16g
Stand by Current
Under the minimum current consumption environment
(such as paging period 9), the level of standby current
is below 4mA.
Talk time Up to 3hours (GSM TX Level 7)
Stand by time Up to 200hours (Paging Period: 9, RSSI: -85 dBm)
Charging time Standard charge: 5hours
Rapid charge: Approx. 2.5hours
RX Sensitivity GSM, EGSM: -105dBm, DCS: -105dBm
TX output power GSM, EGSM: 33dBm(Level 5),
DCS: 30dBm(Level 0)
SIM card type 3V Small
Display Main LCD: 128 ×160 pixel 65K Color
Sub LCD: 96 ×64 pixel 256 Color
Status Indicator
Hard icons. Key Pad
0 ~ 9, #, *, Up/Down Navigation Key
Confirm Key, Clear Key
Send Key, END/PWR Key
ANT External
EAR Phone Jack Yes
PC Synchronization Yes
Speech coding EFR/FR/HR
Data and Fax Yes
2. PERFORMANCE
GPRS compatibility Class 10
Vibrator Yes
Loud Speaker Yes
Voice Recoding Yes
C-Mike Yes
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Travel Adapter Yes
Options Hands-free kit, CLA, Data Kit
Receiver Yes
Camera VGA 640 ×320 pixel
MIDI 32 Poly
Item Feature Comment
2. PERFORMANCE
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2.2 Technical Specification
Item Description Specification
1Frequency Band
GSM
TX: 890 + n × 0.2 MHz
RX: 935 + n × 0.2 MHz (n=1~124)
EGSM
TX: 890 + (n-1024) × 0.2 MHz
RX: 935 + (n-1024) × 0.2 MHz (n=975~1024)
DCS
TX: 1710 + (n-512) × 0.2 MHz
RX: 1805 + (n-512) × 0.2 MHz (n=512~885)
2Phase Error RMS < 5 degrees
Peak < 20 degrees
3Frequency Error < 0.1 ppm
4Power Level
Level Power Toler. Level Power Toler.
6 31dBm ±3dB 14 15dBm ± 3dB
7 29dBm ±3dB 15 13dBm ± 3dB
8 27dBm ±3dB 16 11dBm ± 5dB
9 25dBm ±3dB 17 9dBm ± 5dB
10 23dBm ±3dB 18 7dBm ± 5dB
11 21dBm ±3dB 19 5dBm ± 5dB
12 19dBm ±3dB
GSM, EGSM
5 33dBm ±2dB 13 17dBm ± 3dB
Level Power Toler. Level Power Toler.
1 28dBm ±3dB 9 12dBm ± 4dB
2 26dBm ±3dB 10 10dBm ± 4dB
3 24dBm ±3dB 11 8dBm ± 4dB
4 22dBm ±3dB 12 6dBm ± 4dB
5 20dBm ±3dB 13 4dBm ± 4dB
6 18dBm ±3dB 14 2dBm ± 5dB
7 16dBm ±3dB 15 0dBm ± 5dB
DCS
0 30dBm ±2dB 8 14dBm ± 3dB
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2. PERFORMANCE

5Output RF Spectrum
(due to modulation)
Offset from Carrier (kHz). Max. dBc
100 +0.5
200 -30
250 -33
400 -60
600~ <1,200 -60
1,200~ <1,800 -60
1,800~ <3,000 -63
3,000~ <6,000 -65
6,000 -71
GSM, EGSM
Offset from Carrier (kHz). Max. dBc
100 +0.5
200 -30
250 -33
400 -60
600~ <1,200 -60
1,200~ <1,800 -60
1,800~ <3,000 -65
3,000~ <6,000 -65
6,000 -73
DCS
6
Output RF Spectrum
(due to switching
transient)
GSM, EGSM
Offset from Carrier (kHz). Max. dBm
400 -19
600 -21
1,200 -21
1,800 -24
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Item Description Specification
2. PERFORMANCE