LG -- U8110.pdf
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SM U8110_English 0430
Service Manual
U8110
P/N : MMBD0032201
Date: May, 2004 / Issue 1.0
Table Of Contents
1. INTRODUCTION .............................. 6
3.2.3 Camera & Camera FPC Interface... 40
3.2.4 Camera Position Detection............. 42
1.1 Purpose................................................... 6
1.2 Regulatory Information............................ 6
3.2.5 Camera Regulator .......................... 42
3.2.6 Display & LCD FPC Interface ......... 43
1.3 Abbreviations.......................................... 8
3.2.7 Main LCD Backlight Illumination..... 46
3.2.8 Sub LCD Backlight Illumination ...... 47
3.2.9 Keypad Illumination ........................ 48
2. PERFORMANCE............................ 10
2.1 System Overview.................................. 10
3.2.10 Camera Flash Illumination............ 49
2.2 Usable environment.............................. 11
3.3 LCD Module.......................................... 50
2.3 Radio Performance............................... 11
3.4 Analog Baseband (ABB) Processor...... 51
3.4.1 Overview of Audio path................... 51
3.4.2 Audio Signal Processing &
Interface.......................................... 52
2.4 Current Consumption............................ 17
2.5 RSSI...................................................... 17
2.6 Battery Bar............................................ 17
2.7 Sound Pressure Level........................... 18
3.4.3 Audio Mode..................................... 54
3.4.4 Voice Call........................................ 55
2.8 Charging ............................................... 19
3. Technical Brief .............................. 20
3.4.5 MIDI (Ring Tone Play) .................... 59
3.4.6 MP3 (Audio Player)......................... 60
3.4.7 Video Telephony............................. 61
3.1 Digital Baseband(DBB)&
Multimedia Processor ........................... 20
3.4.8 Audio Main Component .................. 62
3.4.9 GPADC(General Purpose ADC) and
AUTOADC2 .................................... 64
3.1.1 General Description........................ 20
3.1.2 Hardware Architecture.................... 21
3.1.3 External memory interface.............. 25
3.1.4 RF Interface.................................... 26
3.1.5 SIM Interface .................................. 28
3.4.10 Charger control............................. 65
3.4.11 Fuel Gauge................................... 66
3.4.12 Battery Temperature
Measurement................................ 67
3.4.13 Charging Part................................ 68
3.1.6 UART Interface............................... 28
3.1.7 GPIO (General Purpose Input/Output)
map................................................. 29
3.5 Voltage Regulation ............................... 71
3.5.1 Internal Regulation.......................... 71
3.1.8 USB ................................................ 31
3.1.9 IrDA Interface.................................. 33
3.1.10 Folder ON/OFF Operation ............ 34
3.5.2 External Regulation ........................ 71
3.6 General Description.............................. 73
3.1.11 Power On Sequence..................... 35
3.1.12 Key Pad ........................................ 36
3.7 GSM Mode............................................ 75
3.7.1 Receiver.......................................... 75
3.7.2 Transmitter...................................... 80
3.2 GAM Hardware Subsystem .................. 37
3.2.1 General Description........................ 37
3.2.2 Block Description............................ 38
3.8 WCDMA Mode...................................... 82
3.8.1 Receiver.......................................... 82
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Table Of Contents
3.8.2 Transmitter...................................... 85
3.8.3 Frequency Generation.................... 89
4.20.1 Checking..................................... 152
4.20.2 Checking Ant. SW module.......... 152
4. TROUBLE SHOOTING .................. 91
4.20.3 Checking Control Signal ............. 152
4.20.4 Checking RF TX Level................ 155
4.1 Power ON Trouble................................ 91
4.20.5 Checking PAM Block .................. 158
4.20.6 Checking RX I,Q......................... 162
4.20.7 Checking RX Level ..................... 164
4.2 USB Trouble ......................................... 93
4.3 SIM Detect Trouble............................... 94
4.4 Keypad Trouble..................................... 95
4.21 Checking GSM Block........................ 166
4.5 Camera Trouble.................................... 96
4.21.1 Checking Regulator Circuit ........ 167
4.21.2 Checking VCXO Block ............... 167
4.6 Main LCD Trouble................................. 98
4.21.3 Checking Ant. SW Module.......... 167
4.21.4 Checking Control Signal ............. 168
4.21.5 Checking RF Tx Path.................. 170
4.7 Sub LCD Trouble.................................. 99
4.8 Keypad Backlight Trouble................... 100
4.9 Folder ON/OFF Trouble...................... 102
4.21.6 Checking RF Rx Path ................. 175
4.10 Camera Detection Trouble................ 104
4.11 Camera Flash Trouble...................... 106
5. BLOCK DIAGRAM....................... 180
4.12 Audio Trouble Shooting .................... 108
5.1 GSM & WCDMA RF Block.................. 180
4.13 Charger Trouble Shooting................. 123
5.2 Interface Diagram ............................... 182
4.14 RF Component.................................. 126
5.3 Detailed Interface Signal..................... 184
4.15 Procedure to check........................... 128
4.16 Checking Common
Power Source Block.......................... 129
4.16.1 Step 1 ......................................... 130
6. DISASSEMBLY INSTRUCTION... 186
7. DOWNLOAD ................................ 194
4.16.2 Step 2 ......................................... 131
4.16.3 Step 3 ......................................... 132
4.16.4 Step 4 ......................................... 133
8. CALIBRATION ............................. 207
8.1 General Description............................ 207
4.16.5 Checking Regular Part................ 136
8.2 XCALMON Environment..................... 207
8.2.1 H/W Environment.......................... 207
4.17 Checking VCXO Block...................... 137
4.18 Checking Ant. SW Module Block...... 142
8.2.2 S/W Environment.......................... 207
8.2.3 Configuration Diagram of
Calibration Environment................ 207
4.19 Checking Antenna Switch Block
input logic.......................................... 143
4.19.1 Mode Logic by TP Command ..... 143
4.19.2 Checking Switch Block
power source .............................. 145
8.3 Calibration Explanation....................... 208
8.3.1 Overview....................................... 208
8.3.2 Calibration Items........................... 208
8.3.3 EGSM 900 Calibration Items ........ 209
4.20 Checking WCDMA Block.................. 151
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Table Of Contents
8.3.4 DCS 1800 Calibration Items ......... 214
8.3.5 WCDMA Calibration Items............ 217
8.3.6 Baseband Calibration Item ........... 225
8.4 Program Operation ............................. 226
8.4.1 XCALMON Program Overview ..... 226
8.4.2 XCALMON Icon Description ......... 227
8.4.3 Calibration Procedure................... 230
8.4.4 Calibration Result Message.......... 232
9. CIRCUIT DIAGRAM..................... 235
10. PCB LAYOUT............................. 244
11. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 248
11.1 EXPLODED VIEW............................ 248
11.2 Replacement Parts
<Mechanic component>.................... 249
<Main component> ........................... 252
11.3 Accessory ......................................... 271
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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 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 phones 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 phones 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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