LG KS660 User manual

Service Manual Model : KS660
Internal Use Only
Service Manual
KS660
Date: December, 2008 / Issue 1.0

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
REVISED HISTORY
Editor Date Issue Contents of Changes S/W Version
H.J.YANG 21/10/2008 A
* The information in this manual is subject to change without notice and should not be
construed as a commitment by LGE Inc. Furthermore, LGE Inc. reserves the right, without
notice, to make changes to equipment design as advances in engineering and manufacturing
methods warrant.
zThis manual provides the information necessary to install, program, operate and
maintain the KS660.

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LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Table Of Contents
1. INTRODUCTION ............................................... 8
1.1 Purpose......................................................................8
1.2 Regulatory Information.................................................8
2. PERFORMANCE............................................. 10
2.1 H/W Feature..............................................................10
2.2 Technical specification ...............................................11
3. TECHNICAL BRIEF......................................... 17
3.1 KS660 Functional Block diagram ...............................17
3.2 Baseband Processor (BBP) Introduction ......................18
3.3 Power management IC...............................................28
3.4 Power ON/OFF ..........................................................33
3.5 Dual SIM & u-SD Interface .........................................35
3.6 Memory ....................................................................37
3.7 LCD Display ..............................................................39
3.8 Keypad .....................................................................40
3.9 Keypad Backlight.......................................................41
3.10 LCD Backlight .........................................................42
3.11 JTAG & ETM interface connector ..............................43
3.12 Charging Circuit ......................................................43
3.13 18pin Multi Media Interface connector......................44
3.14 Acceleration sensor .................................................45
3.15 Touch Operation ......................................................46
3.16 Camera & Flash LED................................................47
3.17 KS660 RF Block Diagram.........................................51
3.18 RF Block General Description ...................................51
3.19 Receiver part...........................................................55
3.20 Transmitter part.......................................................57
3.21 RF synthesizer.........................................................59
3.22 DCXO .....................................................................59
3.23 Front End Module control.........................................61
3.24 Power Amplifier Module ...........................................63
3.25 Mode Selection .......................................................64
4. TROUBLE SHOOTING..................................... 65
4.1 Trouble shooting test setup ........................................65
4.2 Power on Trouble.......................................................66
4.3 Charging trouble........................................................69
4.4 LCD display trouble ...................................................72
4.5 Camera Trouble.........................................................75
4.6 Vibrator trouble..........................................................77
4.7 Keypad back light trouble...........................................79
4.8 Touch trouble ............................................................81
4.9 Trouble shooting of RF Block 1 (SG3) Receiver part......82
4.10 Trouble shooting of RF Block 1 (SG3) Transmitter part 82
4.11 Trouble shooting of RF Block 2 (SGR) Receiver part 97
4.12 Trouble shooting of RF Block 2 (SGR)
Transmitter part.....................................................103
5. DOWNLOAD & S/W UPGRADE..................... 112
6. BLOCK DIAGRAM........................................ 123
7. CIRCUIT DIAGRAM...................................... 125
8. BGA PIN MAP.............................................. 135
9. PCB LAYOUT ............................................... 145
10. RF CALIBRATION ...................................... 151
10.1 RF Block 1 (SG3) RF Calibration..............................151
10.2 RF Block 2 (SGR) RF Calibration .............................156
11. STAND-ALONE TEST ................................. 162
11.1 RF Block 1 (SG3) Stand-alone Test .........................162
11.2 RF Block 2 (SGR) Stand-alone Test .........................167
12. ENGINEERING MODE................................. 172
13. EXPLODED VIEW & REPLACEMENT
PART LIST ................................................. 173
13.1 EXPLODED VIEW ...................................................173
13.2 Replacement Parts ................................................175
13.3 Accessory .............................................................206

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LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1. INTRODUCTION
ABBREVIATION
For the purposes of this manual, following abbreviations apply:

APC Automatic Power Control

BB Baseband

BER Bit Error Ratio

CC-CV Constant Current – Constant Voltage

CLA Cigar Lighter Adapter

DAC Digital to Analog Converter

DCS Digital Communication System

dBm dB relative to 1 milli-watt

DSP Digital Signal Processing

EEPROM Electrical Erasable Programmable Read-Only Memory

EGPRS Enhanced General Packet Radio Service

EL Electroluminescence

ESD Electrostatic Discharge

FPCB Flexible Printed Circuit Board

GMSK Gaussian Minimum Shift Keying

GPIB General Purpose Interface Bus

GPRS General Packet Radio Service

GSM Global System for Mobile Communications

IPUI International Portable User Identity

IF Intermediate Frequency

LCD Liquid Crystal Display

LDO Low Drop Output

LED Light Emitting Diode

LGE LG Electronics

OPLL Offset Phase Locked Loop

PAM Power Amplifier Module

PCB Printed Circuit Board

PGA Programmable Gain Amplifier

PLL Phase Locked Loop

PSTN Public Switched Telephone Network

RF Radio Frequency

RLR Receiving Loudness Rating

RMS Root Mean Square

RTC Real Time Clock

SAW Surface Acoustic Wave

SIM Subscriber Identity Module

SLR Sending Loudness Rating

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION

SRAM Static Random Access Memory

STMR Side Tone Masking Rating

TA Travel Adapter

TDD Time Division Duplex

TDMA Time Division Multiple Access

UART Universal Asynchronous Receiver/Transmitter

VCO Voltage Controlled Oscillator

DCXO Digitally Controled Crystal Oscillator

WAP Wireless Application Protocol
◆8PSK 8 Phase Shift Keying

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LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1. INTRODUCTION
1. INTRODUCTION
1.1. Purpose
This manual provides the information necessary to repair, calibration, description and download the
features of the KS660.
1.2. Regulatory Information
1.2.1. 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 you’re 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. LGE 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. LGE will not be responsible for any charges that
result from such unauthorized use.
1.2.2. 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.
1.2.3. 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 KS660 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.
1.2.4. Maintenance Limitations
Maintenance limitations on the KS660 must be performed only at the LGE or its authorized agents. 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.
1.2.5. Notice of Radiated Emissions
The KS660 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.
1.2.6. Pictures
The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly
different.
1.2.7. Interference and Attenuation
An KS660 may interfere with sensitive laboratory equipment, medical equipment, etc. Interference from
unsuppressed engines or electric motors may cause problems.

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
1.2.8. Electrostatic Sensitive Devices
ATTENTION
Boards, which contains 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 such as
EEPROM to the factory, use the protective package as described.

2.1. H/W Feature
Item Feature Comment
Standard Battery Lithium-Ion Polymer, 950mAh
AVG TCVR Current 270mA typ @PL5
Standby Current 3.5 mA typ @PP5
Talk time 3 hours (GSM TX Level 7)
Standby time Over 250 hours (Paging Period:9, RSSI: -85dBm)
Charging time Under 3 hours
RX Sensitivity EGSM/GSM900:-105dBm,DCS/PCS:-105dBm
TX output power EGSM/GSM900 : 33dBm (@PL 5)
DCS/PCS: 30dBm (@PL 0)
GPRS compatibility Class 10
SIM card type 3V Small
Display Main 240 u400 pixels, 3” WQVGA, 262K color
Status Indicator Send Key, Shortcut Key, Volume Up/Down Key, PWR
Key, Camera Key, Lock Key
ANT Built in antenna
EAR Phone Jack 18pin multi port Headset jack
PC Synchronization Yes
Speech coding HR/EFR/FR/AMR
Data and Fax Yes
Vibrator Yes
Buzzer No
Voice Recoding Yes
C-Mic Yes
Receiver Yes
Travel Adapter Yes
Options Bluetooth hands-free kit, Data Kit
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LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
2. PERFORMANCE

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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2. PERFORMANCE
2.2. Technical specification
Item Description Specification
1Frequency Band
GSM900
TX: 890 + 0.2 x n MHz
RX: 935 + 0.2 x n MHz ( n = 1 ~ 124 )
EGSM
TX: 890 + 0.2 x (n-1024) MHz
RX: 935 + 0.2 x (n-1024) MHz ( n = 975 ~ 1023 )
DCS1800
TX: 1710 + ( n-511 ) u0.2 MHz (n = 512 a885)
RX: TX + 95 MHz
PCS1900
TX: 1850.2 + ( n-512 ) u0.2 MHz (n = 512 a810)
RX: TX + 80MHz
2Phase Error RMS < 5 degrees
Peak < 20 degrees
3Frequency Error < 0.1ppm
GSM900/EGSM
Level Power Toler. Level Power Toler.
5 33 dBm ±2dB 13 17 dBm ±3dB
6 31 dBm ±3dB 14 15 dBm ±3dB
7 29 dBm ±3dB 15 13 dBm ±3dB
8 27 dBm ±3dB 16 11 dBm ±5dB
9 25 dBm ±3dB 17 9 dBm ±5dB
10 23 dBm ±3dB 18 7 dBm ±5dB
11 21 dBm ±3dB 19 5 dBm ±5dB
12 19 dBm ±3dB
DCS1800/PCS1900
Level Power Toler. Level Power Toler.
0 30 dBm ±2dB 8 14 dBm ±3dB
1 28 dBm ±3dB 9 12 dBm ±4dB
2 26 dBm ±3dB 10 10 dBm ±4dB
3 24 dBm ±3dB 11 8 dBm ±4dB
4 22 dBm ±3dB 12 6 dBm ±4dB
5 20 dBm ±3dB 13 4 dBm ±4dB
6 18 dBm ±3dB 14 2 dBm ±5dB
4Power Level
7 16 dBm ±3dB 15 0 dBm ±5dB