LG KF510C User manual

Date: May, 2008 / Issue 1.0
Service Manual Model : KF510c/KF510d
Service Manual
KF510c/KF510d
Internal Use Only

LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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* 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.
* This manual provides the information necessary to install, program, operate and maintain the KF510.
REVISED HISTORY
Editor Date Issue Contents of Changes S/W Version
S.J.CHOI 4/10 0.1

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

LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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1. INTRODUCTION .....................................7
1.1 Purpose .......................................................... 7
1.2 Regulatory Information.................................... 7
1.3 ABBREVIATION.............................................. 9
2. PERFORMANCE...................................11
2.1 H/W Features.................................................11
2.2 Technical specification...................................12
3. TECHNICAL BRIEF ..............................19
3.1 KF510 Functional Block diagram... ................19
3.2 Baseband Processor (BBP) Introduction .......20
3.3 Power management IC ..................................30
3.4 Power ON/OFF ..............................................36
3.5 SIM & uSD interface.......................................38
3.6 Memory ..........................................................40
3.7 LCD Display ...................................................41
3.8 Keypad Switching & Scanning .......................43
3.9 Keypad back-light illumination........................45
3.10 LCD back-light illumination...........................46
3.11 ALC ..............................................................48
3.12 Battery current consumption monitor ...........49
3.13 JTAG & ETM interface connector ................50
3.14 Audio............................................................51
3.15 Multi port switch ...........................................53
3.16 Charging circuit.............................................54
3.17 FM radio & BLUETOOTH.............................55
3.18 Touch PAD...................................................58
3.19 18pin Multi Media Interface connector .........60
3.20 General Description .....................................62
3.21 Receiver part................................................65
3.22 Transmitter part............................................66
3.23 RF synthesizer .............................................67
3.24 VCTCXO ......................................................67
3.25 Front End Module control.............................68
3.26 Power Amplifier Module ...............................69
3.27 Mode Selection ............................................70
3.28 PAM Schematic............................................70
4. PCB layout............................................71
4.1 Main & Sub PCB component placement........71
5. Trouble shooting..................................75
5.1 Trouble shooting test setup............................75
5.2 Power on Trouble...........................................76
5.3 Charging trouble.............................................80
5.4 LCD display trouble........................................83
5.5 Camera Trouble .............................................85
5.6 Receiver & Speaker trouble ...........................87
5.7 Microphone trouble ........................................90
5.8 Vibrator trouble...............................................92
5.9 Keypad back light trouble...............................94
5.10 SIM & uSD trouble .......................................96
5.11 Touch pad trouble ........................................99
5.12 Trouble Shooting of Receiver Part.............101
5.13 Trouble Shooting of Transmitter Part.........107
6. Download & S/W upgrade .....................115
6.1 S/W download setup ....................................115
6.2 Download program user guide.....................116
7. Block Diagram....................................121
8. CIRCUIT DIAGRAM ............................123
9. BGM PIN MAP.....................................131
10. PCB LAYOUT....................................133
11. RF Calibration...................................143
11.1 Test Equipment Setup................................143
11.2 Calibration Step..........................................143
12. Stand-alone Test ..............................148
12.1 Test Program Setting .................................148
12.2 Tx Test .......................................................150
12.3 Rx Test.......................................................151
13. ENGINEERING MODE......................152
14. EXPLODED VIEW & REPLACEMENT
PART LIST.........................................153
14.1 Exploded View ...........................................153
14.2 Replacement Parts.....................................155
14.3 Accessory.................................................. 175
Table Of Contents

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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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1. INTRODUCTION
1.1 Purpose
This manual provides the information necessary to repair, calibration, description and download the
features of the KF510.
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 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.
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 KF600 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.
D. Maintenance Limitations
Maintenance limitations on the KF510 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. INTRODUCTION
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Only for training and service purposes

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1. INTRODUCTION
E. Notice of Radiated Emissions
The KF510 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
An KF510 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 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.
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1. INTRODUCTION
1.3 ABBREVIATION
For the purposes of this manual, following abbreviations apply:
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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

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1. INTRODUCTION
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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
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
VCTCXO Voltage Control Temperature Compensated Crystal Oscillator
WAP Wireless Application Protocol
8PSK 8 Phase Shift Keying

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2. GENERAL PERFORMANCE
2.1 H/W Feature
2. GENERAL PERFORMANCE
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Only for training and service purposes
Item Feature Comment
Standard Battery Li-ion, 800mAh
AVG TCVR Current 255mA typ @PL5
Standby Current 1.8mA typ @PP9
Talk time 3 hours (GSM TX Level 5)
Standby time Over 350 hours (Paging Period: 9, RSSI: -85dBm)
Charging time Under 3 hours
RX Sensitivity EGSM : -105dBm↓, DCS/PCS : -105dBm↓
TX output power EGSM : 32.5dBm (@PL 5)
DCS/PCS: 30/29.5dBm (@PL 0)
GPRS compatibility Class 10
SIM card type 3V Small
Display Main 240 x 320 pixels, 2.2” QVGA, 265K color,TFT
Status Indicator Navi, Send, Call End, Back and etc.
Key are implemented by touchpad.
CLEAR, SEND, END/PWR, MP3, AF/Camera double action,
Volume Up, Volume Down, Lock
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 Data Kit, Data CD

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2. GENERAL PERFORMANCE
2.2 Technical specification
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Description Specification
GSM8500/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
1Frequency Band RX: 935 + 0.2 x (n-1024) MHz ( n = 975 ~ 1023 )
DCS1800
TX: 1710 + ( n-511 ) x 0.2 MHz (n = 512 ~ 885)
RX: TX + 95 MHz
PCS1900
TX: 1850.2 + ( n-512 ) x 0.2 MHz (n = 512 ~ 810)
RX: TX + 80MHz
2Phase Error RMS < 5 degrees
Peak < 20 degrees
3Frequency Error < 0.1ppm
GSM8500/GSM900/EGSM
Level Power Toler. Level Power Toler.
533 dBm 2dB 13 17 dBm 3dB
631 dBm 3dB 14 15 dBm 3dB
729 dBm 3dB 15 13 dBm 3dB
827 dBm 3dB 16 11 dBm 5dB
925 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
4Power Level DCS1800/PCS1900
Level Power Toler. Level Power Toler.
030 dBm 2dB 8 14 dBm 3dB
128 dBm 3dB 9 12 dBm 4dB
226 dBm 3dB 10 10 dBm 4dB
324 dBm 3dB 11 8 dBm 4dB
422 dBm 3dB 12 6 dBm 4dB
520 dBm 3dB 13 4 dBm 4dB
618 dBm 3dB 14 2 dBm 5dB
716 dBm 3dB 15 0 dBm 5dB

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2. GENERAL PERFORMANCE
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Only for training and service purposes
Item Description Specification
GSM8500/GSM900/EGSM
Offset from Carrier (kHz). Max. dBc
100 +0.5
200 -30
250 -33
400 -60
600 ~ 1,200 -60
1,200 ~ 1,800 -60
1,800 ~ 3,000 -63
3,000 ~ 6,000 -65
5Output RF Spectrum 6,000 -71
(due to modulation) DCS1800/PCS1900
Offset from Carrier (kHz). Max. dBc
100 +0.5
200 -30
250 -33
400 -60
600 ~ 1,200 -60
1,200 ~ 1,800 -60
1,800 ~ 3,000 -65
3,000 ~ 6,000 -65
6,000 -73
GSM8500/GSM900/EGSM
Offset from Carrier (kHz) Max. (dBm)
Output RF Spectrum 400 -19
6(due to switching transient) 600 -21
1,200 -21
1,800 -24

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2. GENERAL PERFORMANCE
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Description Specification
DCS1800/PCS1900
Offset from Carrier (kHz). Max. (dBm)
Output RF Spectrum 400 -22
6(due to switching transient) 600 -24
1,200 -24
1,800 -27
7Spurious Emissions Conduction, Emission Status
EGSM
8Bit Error Ratio BER (Class II) < 2.439% @-102dBm
DCS1800/PCS1900
BER (Class II) < 2.439% @-100dBm
9Rx Level Report accuracy
10 SLR 8 3 dB
Frequency (Hz) Max.(dB) Min.(dB)
100 -12 -
200 0 -
300 0 -12
11 Sending Response 1,000 0 -6
2,000 4 -6
3,000 4 -6
3,400 4 -9
4,000 0 -
12 RLR 2 3 dB
Frequency (Hz) Max.(dB) Min.(dB)
100 -12 -
200 0 -
300 2 -7
500 *-5
13 Receiving Response 1,000 0 -5
3,000 2 -5
3,400 2 -10
4,000 2
*Mean that Adopt a straight line in between 300 Hz
and 1,000 Hz to be Max. level in the range.

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2. GENERAL PERFORMANCE
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Description Specification
14 STMR 13 5 dB
15 Stability Margin > 6 dB
dB to ARL (dB) Level Ratio (dB)
-35 17.5
-30 22.5
-20 30.7
16 Distortion -10 33.3
033.7
731.7
10 25.5
17 Side Tone Distortion Three stage distortion < 10%
18 System frequency 2.5ppm
(26 MHz) tolerance
19 32.768KHz tolerance 30ppm
Standby
20 Power consumption - Normal 2 mA(@PP9)
21 Talk Time EGSM/Lvl 5 (Battery Capacity 800mA):180 min
EGSM/Lvl10(Battery Capacity 800 mA):300min
Under conditions, at least 300 hours:
1. Brand new and full 800mAh battery
22 Standby Time 2. Full charge, no receive/send and keep GSM in idle mode.
3. Broadcast set off.
4. Signal strength display set at 3 level above.
5. Backlight of phone set off.
At least 65 dB under below conditions:
23 Ringer Volume 1. Ringer set as ringer.
2. Test distance set as 50 cm
24 Charge Current Fast Charge : < 500 mA
Slow Charge: < 100 mA
Antenna Bar Number Power
7>-92 dBm ~
5-97dBm ~ -93dBm
25 Antenna Display 4-100dBm ~ -98dBm
2-103dBm ~ -101dBm
1-105dBm ~ -104dBm
0<-106 dBm
Off No Service

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2. GENERAL PERFORMANCE
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Item Description Specification
Battery Bar Number Voltage( 0.05V)
33.69V ~ 4.2V
26 Battery Indicator 2 3.53V ~ 3.69V
13.43V ~ 3.53V
03.30V ~ 3.43V
27 Low Voltage Warning 3.48V ↓0.05V (Call)
3.43V ↓0.05V (Standby)
28 Forced shut down Voltage 3.3 0.05 V
Li-ion Battery
29 Battery Type Standard Voltage = 3.7 V
Battery full charge voltage = 4.2 V
Capacity: 800mAh
Switching-mode charger
30 Travel Charger Input: 100 ~ 240 V, 50/60Hz
Out put: 5.1V, 0.7A

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2. GENERAL PERFORMANCE
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* EDGE RF Specification (Option: is not serviced for “EDGE mode”)
Item Description Specification
1RMS EVM 9%
2Peak EVM 30%
395
th Percentile EVM 15%
4Origin Offset Suppression ≥ 30dB
GSM8500/GSM900/EGSM
Level Power Toler. Level Power Toler.
527dBm 3dB 13 17dBm 3dB
627dBm 3dB 14 15dBm 3dB
727dBm 3dB 15 13dBm 3dB
827dBm 3dB 16 11dBm 5dB
925dBm 3dB 17 9dBm 5dB
10 23dBm 3dB 18 7dBm 5dB
11 21dBm 3dB 19 5dBm 5dB
5Power Level 12 19dBm 3dB
DCS1800/PCS1900
Level Power Toler. Level Power Toler.
026/25dBm 3dB 8 14 dBm 3dB
126/25dBm 3dB 9 12 dBm 4dB
226/25dBm 3dB 10 10 dBm 4dB
324 dBm 3dB 11 8 dBm 4dB
422 dBm 3dB 12 6 dBm 4dB
520 dBm 3dB 13 4 dBm 4dB
618 dBm 3dB 14 2 dBm 5dB
716 dBm 3dB 15 0 dBm 5dB
6Output RF Spectrum GSM8500/GSM900/EGSM
(due to modulation) Offset from carrier(kHz) Max. dBc
100 +0.5
200 -30
250 -33
400 -54
600 ~ <1,200 -60
1,200 ~ <1,800 -60
1,800 ~ <3,000 -63
3,000 ~ <6,000 -65
6,000 -71

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Only for training and service purposes
2. GENERAL PERFORMANCE
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Item Description Specification
6Output RF Spectrum DCS1800/PCS1900
(due to modulation) Offset from carrier(kHz) Max. dBc
100 +0.5
200 -30
250 -33
400 -54
600 ~ <1,200 -60
1,200 ~ <1,800 -60
1,800 ~ <3,000 -63
3,000 ~ <6,000 -65
6,000 -71
7Output RF Spectrum GSM8500/GSM900/EGSM
(due to switching transient) Offset from carrier(kHz) Max. dBm
400 -23
600 -26
1,200 -27
1,800 --30
DCS1800/PCS1900
Offset from carrier(kHz) Max. dBm
400 -23
600 -26
1,200 -27
1,800 -30

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3. TECHNICAL BRIEF
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3.1 KF510 Functional Block diagram
The functional component arrangement is mentioned below diagram.
3. TECHNICAL BRIEF
Figure 2 KF510 Functional block diagram

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3. TECHNICAL BRIEF
3.2 Baseband Processor (BBP) Introduction
3.2.1 General Description
S-GOLD3™ is a GSM/EDGE single chip mixed signal Baseband IC containing all analog and digital
functionality of a cellular radio. Additionally S-GOLD3™ Provides multimedia extensions such as
camera, software MIDI, MP3 sound. It is designed as a single chip solution, integrating the digital and
mixed signal portions of the base band in 0.09um, 1.2V technology.
The chip will fully support the FR, EFR, HR and AMR-NB vocoding.
S-GOLD3™ support multi-slot operation modes HSCSD (up to class 10), GPRS for high speed data
application (up to class 12) and EGPRS (up to class 12) without additional external hardware.
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Figure 3 Top level block diagram of the S-GOLD3™(PMB8877)

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3. TECHNICAL BRIEF
3.2.2 Block Description
• Processing core
ARM926EJ-S 32 bit processor core for controller functions. The ARM926EJ-S includes an MMU,
and the Jazelle Java extension for Java acceleration.
- TEAKLite DSP core
• ARM-Memory
- 32k Byte Boot ROM on the AHB
- 96k Byte SRAM on the AHB, flexibly usable as program or data RAM
- 16k Byte Cache for Program (internal)
- 8k Byte tightly coupled memory for Program(internal)
- 8k Byte Cache for Data(internal)
- 8k Byte tightly coupled memory for Data(internal)
• DSP-Memory
- 104K x 16bit Program ROM
- 8k x 16bit Program RAM
- 60k x 16bit Data ROM
- 37k x 16bit Data RAM
- Incremental Redundancy(IR) Memory of 35904 words of 16bit
• Shared Memory Block
1.5K x 32bit Shared RAM(dual ported) between controller system and TEAKLite.
• Controller Bus system
The processor cores and their peripherals are connected by powerful buses.
Multi-layer AHB for connecting the ARM and the other master capable building blocks with the
internal and external memories and with the peripheral buses.
• Clock system
The clock system allows widely independent selection of frequencies for the essential parts of the
S-GOLD3. Thus power consumption and performance can be optimized for each application.
• Functional Hardware block
- CPU and DSP Timers
- MOVE coprocessor performing motion estimation for video encoding algorithms (H.263, MPEG-4)
- Programmable PLL with additional phase shifters for system clock generation
- GSM Timer Module that off-loads the CPU from radio channel timing
- GMSK / 8-PSK Modulator according to GSM-standard 05.04 (5/2000)
- GMSK Modulator: gauss-filter with B*T=0.3
- EDGE Modulator: 8PSK-modulation with linearized GMSK-Pulse-Filter
- Hardware accelerators for equalizer and channel decoding.
- Incremental Redundancy memory for EDGE class 12 support
- A5/1, A5/2, A5/3 Cipher unit
- GEA1, GEA2, GEA3 Cipher Unit to support GPRS data transmission
- Advanced static and dynamic power management features including TDMA-Frame synchronous
low power mode and enhanced CPU modes(idle and sleep modes)
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