LG KU950 User manual

Date: December, 2006 / Issue 1.0
Service Manual Model : KU950
Service Manual
KU950

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1. INTRODUCTION .............................. 5
1.1 Purpose................................................... 5
1.2 Regulatory Information............................ 5
2. PERFORMANCE...............................7
2.1 System Overview.....................................7
2.2 Usable environment.................................8
2.3 Radio Performance..................................8
2.4 Current Consumption.............................14
2.5 RSSI BAR ..............................................14
2.6 Battery BAR ...........................................14
2.7 Sound Pressure Level............................15
2.8 Charging ................................................16
3. TECHNICAL BRIEF ........................17
3.1 General Description ...............................17
3.2 GSM Mode.............................................20
3.3 WCDMA Mode.......................................23
3.4 LO Phase-locked Loop ..........................25
3.5 Off-chip RF Components .......................28
3.6 Digital Baseband (DBB / MSM6275)......35
3.7 Hardware Architecture ...........................36
3.8 Subsystem of MSM6275........................38
3.9 External memory interface.....................41
3.10 Hardware sub system ..........................42
3.11 DVB-H System.....................................66
3.12 Main features of KU950 .......................73
4. TROUBLE SHOOTING ...................79
4.1 RF Component.......................................79
4.2 SIGNAL PATH .......................................81
4.3 Checking VCXO Block...........................83
4.4 Checking Ant. Switch Module Block ......86
4.5 Checking WCDMA Block .......................88
4.6 Checking GSM Block.............................97
4.7 Bluetooth RF Block ..............................105
4.8 Power on trouble..................................108
4.9 USB trouble..........................................110
4.10 SIM detect trouble..............................111
4.11 Key sense trouble ..............................112
4.12 Camera trouble ..................................113
4.13 Main LCD trouble...............................114
4.14 Keypad backlight trouble....................116
4.15 Folder on/off trouble...........................117
4.16 Micro SD trouble ................................118
4.17 Audio trouble......................................119
4.18 Charging trouble ................................129
4.19 DVB-H broadcasting signal reception
trouble ................................................132
4.20 Vibrator trouble ..................................135
5. DOWNLOAD .................................136
5.1 Introduction ..........................................136
5.2 Downloading Procedure.......................136
5.3 Troubleshooting download errors ........149
5.4 Caution.................................................155
6. BLOCK DIAGRAM ........................156
6.1 GSM & WCDMA RF Block...................156
6.2 Interface Diagram ................................158
7. Circuit Diagram ............................163
8. pcb layout .....................................176
9. Calibration Program ....................185
9.1 Configuration of HOT KIMCHI .............185
9.2 How to use HOT KIMCHI.....................189
9.3 Example for using HOT KIMCHI..........190
10. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 193
10.1 EXPLODED VIEW ............................ 193
10.2 Replacement Parts
<Mechanic component>.................... 195
<Main component> ........................... 198
10.3 Accessory ......................................... 220
Table Of Contents

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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 commoncarrier
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 net
work, 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.
1. INTRODUCTION
1. INTRODUCTION

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
A 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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2. PERFORMANCE
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2.1 System Overview
2. PERFORMANCE
Item Specification
Shape GSM900/1800/1900 and WCDMA Folder Handset
Size 100.6 x 50.6 x 21.4 mm
Weight 110 g (with 950mAh Battery)
Power 3.7V normal, 950 mAh Li-Polymer
Talk Time Over 150 min (WCDMA, Tx=12 dBm, Voice)
(with 1000mAh) Over 175 min (GSM, Tx=Max, Voice)
Standby Time Over 200 Hrs (WCDMA, DRX=1.28)
(with 1000mAh) Over 220 Hrs (GSM, Paging period=9)
Antenna Internal type and Antenna
LCD Main 240 X 320 pixel TFT (QVGA LCD Module)
LCD Backlight Blue LED Back Light (main only)
Camera Dual Camera ; 1.3 Mega pixel (CMOS), VGA Camera (CMOS)
Vibrator Yes (Cylinder Type)
LED Indicator No
MIC Yes
Receiver Yes
Earphone Jack Yes
Connectivity Bluetooth, USB
Volume Key Push Type(+, -)
External Memory Trans-Flash
I/O Connect 18 Pin

2.2 Usable environment
1) Environment
2) Environment (Accessory)
* CLA : 12 ~ 24 V(DC)
2.3 Radio Performance
1) Transmitter - GSM Mode
* In case of DCS : [A] -> 1710, [B] -> 1785 * In case of PCS : [A] -> 1850, [B] -> 1910
2. PERFORMANCE
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Item Specification
Voltage 3.7 V(Typ), [Shut Down : 3.22 V]
Operation Temp -20 ~ +60°C
Storage Temp -20 ~ +70°C
Humidity 85 % (Max)
Reference Spec. Min Typ. Max Unit
TA Power Available power 100 220 240 Vac
No Item GSM DCS & PCS
100k~1GHz -39dBm 9k ~ 1GHz -39dBm
MS allocated 1G~[A]MHz -33dBm
Channel 1G~12.75GHz -33dBm [A]M~[B]MHz -39dBm
Conducted [B]M~12.75GHz -33dBm
1Spurious 100k~880MHz -60dBm 100k~880MHz -60dBm
Emission 880M~915MHz -62dBm 880M~915MHz -62dBm
Idle Mode 915M~1GHz -60dBm 915M~1GHz -60dBm
1G~[A]MHz -50dBm 1G~[A]MHz -50dBm
[A]M~[B]MHz -56dBm [A]M~[B]MHz -56dBm
[B]M~12.5GHz -50dBm [B]M~12.5GHz -50dBm

2. PERFORMANCE
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* In case of DCS : [A] -> 1710, [B] -> 1785 * In case of PCS : [A] -> 1850, [B] -> 1910
No Item GSM DCS & PCS
30M ~ 1GHz -36dBm 30M~1GHz -36dBm
MS allocated 1G~[A]MHz -30dBm
Channel 1G ~ 4GHz -30dBm [A]M~[B]MHz -36dBm
Radiated [B]M~4GHz -30dBm
2Spurious 30M ~ 880MHz -57dBm 30M~880MHz -57dBm
Emission 880M ~ 915MHz -59dBm 880M~915MHz -59dBm
Idle Mode 915M~1GHz -57dBm 915M~1GHz -57dBm
1G~[A]MHz -47dBm 1G~[A]MHz -47dBm
[A]M~[B]MHz -53dBm [A]M~[B]MHz -53dBm
[B]M~4GHz -47dBm [B]M~4GHz -47dBm
3Frequency Error ±0.1ppm ±0.1ppm
4Phase Error ±5(RMS) ±5(RMS)
±20(PEAK) ±20(PEAK)
3dB below reference sensitivity 3dB below reference sensitivity
Frequency Error RA250 : ±200Hz RA250: ±250Hz
5Under Multipath and HT100 : ±100Hz HT100: ±250Hz
Interference Condition TU50 : ±100Hz TU50: ±150Hz
TU3 : ±150Hz TU1.5: ±200Hz
0 ~ 100kHz +0.5dB 0 ~ 100kHz +0.5dB
200kHz -30dB 200kHz -30dB
250kHz -33dB 250kHz -33dB
Due to 400kHz -60dB 400kHz -60dB
Output RF modulation 600 ~ 1800kHz -66dB 600 ~ 1800kHz -60dB
61800 ~ 3000kHz -69dB 1800 ~ 6000kHz -65dB
Spectrum 3000 ~ 6000kHz -71dB ≥6000kHz -73dB
≥6000kHz -77dB
Due to 400kHz -19dB 400kHz -22dB
Switching 600kHz -21dB 600kHz -24dB
transient 1200kHz -21dB 1200kHz -24dB
1800kHz -24dB 1800kHz -27dB

2. PERFORMANCE
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No Item GSM DCS & PCS
Frequency offset 800kHz
7Intermodulation attenuation – Intermodulation product should
be Less than 55dB below the
level of Wanted signal
Power control Power Tolerance Power control Power Tolerance
Level (dBm) (dB) Level (dBm) (dB)
533±3 030±3
631±3 128±3
729±3 226±3
827±3 324±3
925±3 422±3
10 23 ±3 5 20 ±3
8Transmitter Output Power 11 21 ±3 6 18 ±3
12 19 ±3 7 16 ±3
13 17 ±3 8 14 ±3
14 15 ±3 9 12 ±4
15 13 ±3 10 10 ±4
16 11 ±5 11 8 ±4
17 9 ±5 12 6 ±4
18 7 ±5 13 4 ±4
19 5 ±5 14 2 ±5
15 0 ±5
9Burst timing Mask IN Mask IN

2. PERFORMANCE
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2) Transmitter - WCDMA Mode
No Item Specification
1Maximum Output Power Class 3 : +24dBm(+1/-3dB)
Class 4 : +21dBm(±2dB)
2Frequency Error ±0.1ppm
3Open Loop Power control in uplink ±9dB@normal, ±12dB@extreme
Adjust output(TPC command)
cmd 1dB 2dB 3dB
+1 +0.5/1.5 +1/3 +1.5/4.5
4Inner Loop Power control in uplink 0 -0.5/+0.5 -0.5/+0.5 -0.5/+0.5
-1 -0.5/-1.5 -1/-3 -1.5/-4.5
Group (10 equel command group)
+1 +8/+12 +16/+24
5Minimum Output Power -50dBm(3.84MHz)
Qin/Qout : PCCH quality levels
6Out-of-synchronization handling of output power Toff@DPCCH/Ior : -22 -> -28dB
Ton@DPCCH/Ior : -24 -> -18dB
7Transmit OFF Power -56dBm(3.84MHz)
8Transmit ON/OFF Time Mask ±25us
PRACH,CPCH,uplinlk compressed mode
±25us
9Change of TFC Power varies according to the data rate
DTX : DPCH off
(minimize interference between UE)
10 Power setting in uplink compressed ±3dB(after 14slots transmission gap)
11 Occupied Bandwidth(OBW) 5MHz(99%)
-35-15*(∆f-2.5)dBc@∆f=2.5~3.5MHz,30k
12 Spectrum emission Mask -35-1*(∆f-3.5)dBc@∆f=3.5~7.5MHz,1M
-39-10*(∆f-7.5)dBc@∆f=7.5~8.5MHz,1M
-49dBc@∆f=8.5~12.5MHz,1M