LG - CU400 - Mobile phone
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Equipment:
CU400
Date:
2007
Category:
Group:
Sub Group:
1 Manual
Service manual
Manual type:
Service manual
Pages:
175
Size:
5.2 MB
Language:
english
Revision:
1.0
Manual-ID:
Date:
January 2007
Quality:
Electronic document, no scan, very well readable.
Upload date:
Jan. 15, 2020
MD5:
e650c4d5-d554-3a83-7c81-03ee4c07aa34
Information
1. INTRODUCTION ... 5
1.1 Purpose... 5
1.2 Regulatory Information... 5
2. PERFORMANCE...7
2.1 Default Packaging Accessories ...7
2.2 System Specification...7
2.3 Using Condition (Accessory)...7
2.4 Radio Performance ...8
2.5 Current Consumption...11
2.6 Operation Time ...11
2.7 RSSI Bar ...11
2.8 Battery Bar ...12
2.9 BACKUP BATTERY : Over 50 hours ...12
2.10 Sound Level ...12
3. RF TECHNICAL BRIEF...13
3.1 MSM6280 (Block Diagram)...13
3.2 MSM6280 (GPIO MAP) ...14
3.3 RF Block Diagram...16
3.4 Memory ...17
3.5 Camera & LCD Interface...18
3.6 Interface USB,UART,SIM,JTAG ...19
3.7 Power Block Diagram ...20
3.8 Peripheral...21
3.9 Audio Block Diagram ...22
3.10 Digital Baseband(DBB/MSM6280)...23
3.11 Subsystem(MSM6280) ...26
3.12 Power Block ...33
3.13 External memory interface ...38
3.14 H/W Sub System...39
3.15 Main Features ...57
4. TROUBLE SHOOTING ...62
4.1 RF Component...62
4.2 Checking VCXO Block ...66
4.3 Checking Ant. SW Module Block ...68
4.4 Checking UMTS Block ...71
4.5 Checking GSM Block ...78
4.6 Power ON Troubleshooting...86
4.7 Charger Troubleshooting ...88
4.8 USB Troubleshooting...91
4.9 SIM Detect Troubleshooting ...93
4.10 Camera Troubleshooting ...94
4.11 Keypad Backlight Troubleshooting ...95
4.12 Folder ON/OFF Troubleshooting ...96
4.13 Main LCD Troubleshooting ...97
4.14 Receiver Path ...98
4.15 Headset path...100
4.16 Speaker Phone path...102
4.17 Main microphone ...104
4.18 Headset microphone...106
4.19 Vibrator ...108
5. DOWNLOAD ...109
5.1 Introduction ...109
5.2 Downloading Procedure...109
5.3 Troubleshooting download errors ...123
5.4 Caution...130
6. BLOCK DIAGRAM ...131
6.1 CU400 Block Diagram ...131
7. Circuit Diagram ...133
8. pcb layout ...140
9. Calibration & RF Auto
Test Program ...145
9.1 Configuration of HOT KIMCHI ...145
9.2 How to use HOT KIMCHI...149
9.3 Example for using HOT KIMCHI ...150
10. EXPLODED VIEW &
REPLACEMENT PART LIST ... 153
10.1 EXPLODED VIEW ... 153
10.2 Replacement Parts
<Mechanic component>... 155
<Main component> ... 158
10.3 Accessory ... 174
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lg--cu400--service--ID12479.pdf