Table Of Contents - LG -T370 Service Manual

1. INTRODUCTION ................................................................... 3
1.1 Purpose .....................................................................................................3
1. Regulatory Information ......................................................................3
1.3 Abbreviations..........................................................................................5
2. PERFORMANCE .................................................................... 7
.1 H/W Features ...........................................................................................7
. Technical Specification ........................................................................9
3. TECHNICAL BRIEF ..............................................................14
3.1 Digital Main Processor ...................................................................... 14
3. Power Management ......................................................................... 19
3.3 FEM with integrated Power Amplifier Module (SKY77550-
1, U101) ....................................................................................................... 33
3.4 Crystal(6 MHz, X01) ...................................................................... 35
3.5 RF Subsystem of PMB8815 (U01) .............................................. 36
3.6 MEMORY(H9DAGH1GHMMMR, U301 ) .................................. 41
3.7 BT module ............................................................................................. 44
3.8 SIM Card Interface .............................................................................. 45
3.9 LCD Interface ........................................................................................ 47
3.10 MiniABB (Battery Charger & MUIC) Interface ....................... 50
3.11 Audio Interface ................................................................................ 51
3.1 Camera Interface(M Fixed Focus Camera) .......................... 57
3.13 Touch Interface ................................................................................. 60
4. TROUBLE SHOOTING ........................................................62
4.1 RF Component .................................................................................... 6
4. RX Trouble ............................................................................................. 63
4.3 Power On Trouble ............................................................................... 68
4.4 Charging Trouble ................................................................................ 70
4.5 Vibrator Trouble .................................................................................. 7
4.6 LCD Trouble .......................................................................................... 75
4.7 Camera Trouble ................................................................................... 79
4.8 Speaker / Receiver Trouble ............................................................. 83
4.9 Earphone Trouble ............................................................................... 85
4.10 Microphone Trouble ....................................................................... 88
4.11 SIM Card Interface Trouble ........................................................... 90
4.1 Micro SD (uSD) Trouble ................................................................. 9
4.13 Bluetooth Trouble ............................................................................ 94
4.14 FM Radio Trouble ............................................................................. 96
LGE Internal Use Only

Table Of Contents

4.15 Touch trouble .................................................................................... 98
4.16 Memory trouble .............................................................................100
4.17 Proximity Sensor on/off Trouble Shooting ..........................104
5. DOWNLOAD .....................................................................106
6. BLOCK DIAGRAM .............................................................119
7. CIRCUIT DIAGRAM ..........................................................120
8. BGA PIN MAP ..................................................................127
9. PCB LAYOUT .....................................................................129
10. ENGINEERING MODE ....................................................131
11. STAND ALONE TEST ......................................................132
11.1 Introduction .....................................................................................13
11. Setting Method ..............................................................................13
11.3 Tx Test .................................................................................................134
11.4 Rx Test .................................................................................................134
12.AUTO CALIBRATION .......................................................137
1.1 Overview ...........................................................................................137
1. Tachyon Directory ..........................................................................137
1.3 Test Equipment Setup ..................................................................138
1.4 Procedure ..........................................................................................138
1.5 AGC ......................................................................................................145
1.6 APC ......................................................................................................145
1.7 ADC ......................................................................................................145
1.8 Target Power ....................................................................................145
13. EXPLODED VIEW & REPLACEMENT PART LIST ..........146
13.1 EXPLODED VIEW .............................................................................146
13. Replacement Parts ........................................................................147
13.3 Accessory ..........................................................................................166
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