LG U990 free download

File name LG U990.pdf

Service Manual Internal Use Only Service Manual U990/KU990 Model : U990/KU990 Date: November, 2007 / Issue 1.0 Table Of Contents 1. INTRODUCTION... 5 4.11 Micro SD trouble ...122 1.1 Purpose ... 5 4.12 Audio trouble...123 1.2 Regulatory Information ... 5 4.13 Camera trouble ...136 4.14 Main LCD trouble...142 2. PERFORMANCE ...7 4.15 Bluetooth trouble...145 4.16 Bluetooth RF Test...146 2.1 System Overview...7 4.17 Touch Screen trouble ...147 2.2 Usable environment...8 2.3 Radio Performance...8 5. DOWNLOAD...148 2.4 Current Consumption...16 2.5 RSSI BAR ...17 5.1 Introduction ...148 2.6 Battery BAR ...17 5.2 Downloading Procedure ...148 2.7 Sound Pressure Level ...18 5.3 Troubleshooting Download Errors ...161 2.8 Charging ...18 5.4 Caution ...166 3. TECHNICAL BRIEF...19 6. BLOCK DIAGRAM ...167 3.1 General Description ...19 6.1 GSM & UMTS RF Block ...167 3.2 GSM Mode...21 6.2 Interface Diagram ...169 3.3 UMTS Mode...25 3.4 LO generation and distribution circuits ...27