Page 1 Internal Use Only Service Manual KF350 Date: October, 2008 / Issue 1.0...
Page 2 * This manual provides the information necessary to install, program, operate and maintain the KS360 Series. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 3 -...
Page 4: Table Of Contents
12. EXPLODED VIEW & 3.24 PAM Schematic ......63 REPLACEMENT PART LIST .153 12.1 Exploded View......153 12.2 Replacement Parts......155 12.3 Accessory........174 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 5 - Only for training and service purposes...
Page 6: Introduction
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 KF350 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.
Page 7: Only For Training And Service Purposes
1. INTRODUCTION E. Notice of Radiated Emissions The KF350 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.
Page 8: Abbreviation
Global System for Mobile Communications IPUI International Portable User Identity Intermediate Frequency Liquid Crystal Display Low Drop Output Light Emitting Diode Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 9 - Only for training and service purposes...
Page 9: Only For Training And Service Purposes
Universal Asynchronous Receiver/Transmitter Voltage Controlled Oscillator DCXO Digitally Controled Crystal Oscillator Wireless Application Protocol 8PSK 8 Phase Shift Keying LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 10 - Only for training and service purposes...
Page 10: General Performance
HR/EFR/FR/AMR Data and Fax Vibrator Buzzer Voice Recoding C-Mic Receiver Travel Adapter Options Bluetooth hands-free kit, Data Kit Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 11 - Only for training and service purposes...
Page 11: Technical Specification
8 dBm 22 dBm 6 dBm 20 dBm 4 dBm 18 dBm 2 dBm 16 dBm 0 dBm LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 12 - Only for training and service purposes...
Page 12: Only For Training And Service Purposes
3,000 ~ 6,000 6,000 GSM900/EGSM Offset from Carrier (kHz) Max. (dBm) Output RF Spectrum (due to switching transient) 1,200 1,800 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 13 - Only for training and service purposes...
Page 13: Only For Training And Service Purposes
* Mean that Adopt a straight line in between 300 Hz and 1,000 Hz to be Max. level in the range. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 14 - Only for training and service purposes...
Page 14: Only For Training And Service Purposes
4 → 2 -103dBm ~ -101dBm 2 → 1 -105dBm ~ -104dBm 1 → 0 < -106 dBm No Service Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 15 - Only for training and service purposes...
Page 15: Only For Training And Service Purposes
Battery full charge voltage = 4.2 V Capacity: 800mAh Switching-mode charger Travel Charger Input: 150 ~ 240 V, 50/60Hz Out put: 5.1, 0.4A LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 16 - Only for training and service purposes...
Page 16: Only For Training And Service Purposes
Offset from carrier(kHz) Max. dBc +0.5 600 ~ <1,200 1,200 ~ <1,800 1,800 ~ <3,000 3,000 ~ <6,000 6,000 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 17 - Only for training and service purposes...
Page 17: Only For Training And Service Purposes
(due to switching transient) Offset from carrier(kHz) Max. dBm 1,200 1,800 --30 DCS1800, PCS1900 Offset from carrier(kHz) Max. dBm 1,200 1,800 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 18 - Only for training and service purposes...
Page 18: Technical Brief
3. TECHNICAL BRIEF 3.1 Baseband Processor (BBP) Introduction Figure 1 Top level block diagram of the S-GOLD3TM (PMB8877) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 19 - Only for training and service purposes...
Page 19: General Description
- 60k x 16bit Data ROM - 37k x 16bit Data RAM - Incremental Redundancy(IR) Memory of 35904 words of 16bit LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 20 - Only for training and service purposes...
Page 20: Only For Training And Service Purposes
- An ITU-R BT.656 compatible Camera interface. - Programmable clock output for a camera - An multimedia/Secure Digital Card Interface (MMCI/SD:SDIO capable) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 21 - Only for training and service purposes...
Page 21: Only For Training And Service Purposes
TX RF band select T_OUT3 ANT_SW1 FEM control T_OUT4 ANT_SW2 FEM control T_OUT5 ANT_SW3 FEM control T_OUT6 MODE PAM Mode select LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 22 - Only for training and service purposes...
Page 22: Only For Training And Service Purposes
3. TECHNICAL BRIEF 3.1.5 USIF Interface KF350 have three USIF Drivers as follow : - USIF1 : Hardware Flow Control / SW upgrade / Calibration - USIF2 : Not used Rx, Tx and CTS, RTS use BT Interface - USIF3 : BT Interface Table 3.
Page 23: Only For Training And Service Purposes
3. TECHNICAL BRIEF 3.1.7 GPIO map Over a hundred allowable resources, KF350 is using as follows except dedicated to SIM and Memory. KF350 GPIO(General Purpose Input/Output) Map, describing application, I/O state, and enable level, is shown in below table Table 5 S-Gold3 GPIO pin Map...
Page 24: Only For Training And Service Purposes
LCD data[8] DIF_CS1 DIF_MAIN_CS MAIN LCD chip select DIF_CS2 DIF_SUB_CS SUB LCD chip select DIF_CD DIF_CD Command Data switch Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 25 - Only for training and service purposes...
Page 25: Only For Training And Service Purposes
GPTU0_0 FLASH_EN For Camera Flash LED I2S1_RX I2S1_RX For Bluetooth I2S1_TX I2S1_TX For Bluetooth I2S1_WA0 I2S1_WA For Bluetooth LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 26 - Only for training and service purposes...
Page 26: Only For Training And Service Purposes
Current consumption measure Reference VREF IREF JTAG I/F JTAG JTAG JTAG JTAG TRST_n _TRST JTAG RTCK RTCK JTAG Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 27 - Only for training and service purposes...
Page 27: Only For Training And Service Purposes
D(10) MEM _AD[11] D(11) MEM _AD[12] D(12) MEM _AD[13] D(13) MEM _AD[14] D(14) MEM _AD[15] D(15) MEM _WR_n LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 28 - Only for training and service purposes...
Page 28 MEM _CS2_n _FLASH2_CS Not used MEM _CS3_n _CS3 Not used MEM _ADV_n _ADV MEM _RAS_n _RAS MEM _CAS_n _CAS Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 29 - Only for training and service purposes...
Page 29: Only For Training And Service Purposes
26MHZ_MCLK 26M Main Clock F32K to 32k crystal OSC32K to 32k crystal RESET_n _RESET TRIG_OUT TRIG_OUT RTC_OUT RTC_OUT LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 30 - Only for training and service purposes...
Page 30: Only For Training And Service Purposes
3. TECHNICAL BRIEF VCXO_EN VCXO_EN GPIO_61 _BT_RESET GPIO_62 SLED_BACKLIGHT Navi key LED Backlight Control GPIO_63 _SIM_EN Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 31 - Only for training and service purposes...
Page 31: Power Management Ic
• VQFN 48 package with heat sink and non-protruding leads • Compatible with the Infineon E-GOLD+ V2 and V3 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 32 - Only for training and service purposes...
Page 32: Only For Training And Service Purposes
- driver for backlight LEDs adjustable in steps up to 140mA and with soft turn on and off by PWM dimming - two driver outputs for single LEDs for precharge indication and signaling with i.e. change of colour Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 33 -...
Page 33: Only For Training And Service Purposes
30mA S-GOLD3 PLL VRTC 2V11_RTC 2.11V Real Time Clock VAFC VAFC 2.65V Not used VVIB 2V8_VLCD 2.8V 140mA LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 34 - Only for training and service purposes...
Page 34: Only For Training And Service Purposes
100K R225 R224 C256 _PPR C257 R223 (1%) (1%) (1%) Figure 4 SM-Power circuit diagram with charging part Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 35 - Only for training and service purposes...
Page 35: Only For Training And Service Purposes
-5 ~ 50˚C : standard charging (up to 4.2 V) c. 50˚C ~ : low charging voltage operation (3.6V ~ 3.9V) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 36 - Only for training and service purposes...
Page 36: Power On/Off
ON does not reach VIHdet (Vbat-0.8 ~ Vbat-0.3) the above-mentioned bit won’t be set. To support Remote power on function for factory mass production, applied an analog switch as following figure. As monitoring the RPWRON and Key matrix KP_OUT(2) & KP_IN (0), KF350 system recognize whether remote power on or End-key pushed...
Page 37: Sim & Usd Interface
3. TECHNICAL BRIEF 3.4 SIM & uSD interface KF350 supports 1.8V & 2.9V plug in SIM, SIM interface scheme is shown in (Figure 8). SIM_IO, SIM_CLK, SIM_RST ports are used to communicate with BBP(S-Gold3) and the SIM power supply enabled by PMIC.
Page 38: Only For Training And Service Purposes
Data bit [3] Command response Power Power supply Clock Ground Power ground DAT0 Data bit [0] DAT1 Data bit [1] Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 39 - Only for training and service purposes...
Page 39: Memory
3. TECHNICAL BRIEF 3.5 Memory 1Gbit Flash & 512Mbit DDRAM employed on KF350 with 8 & 16 bit parallel data bus thru ADD(0) ~ ADD(24). The 1Gbit Nand Flash memory with DDRAM stacked device family offers multiple high- performance solutions.
Page 40: Lcd Display
- Backlight : 5 piece of white LED LCD FPC Interface Spec: Table 7. LCD FPC Interface Spec. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 41 - Only for training and service purposes...
Page 41: Keypad Switching & Scanning
VOL_UP VOL_DOWN VOL_DOWN KEY_ROW5 SIDE KEY_VOL KEY_COL0 KEY_COL1 KEY_COL2 KEY_COL3 KEY_COL5 Figure 10 Key pad part key matrix LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 42 - Only for training and service purposes...
Page 42: Keypad Back-Light Illumination
SM-POWER Flash LED drivers is shown in below Figure11. VBAT R100 KEY_BACKLIGHT LD100 LEWWS44-E R101 LEWWS44-E LD101 Figure 11 Keypad Back-light LEDs Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 43 - Only for training and service purposes...
Page 43: Lcd Back-Light Illumination
CURR6 C118 2.2u PHOTO_ADC_IN GPIO DATA Figure 12 LCD Back light unit and Flash LED charge pump IC LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 44 - Only for training and service purposes...
Page 44: Only For Training And Service Purposes
• Read Formats (-. Current-Address Read -. Random-Read, - Sequential °©Read) • DATA Input Delay and CLK Spike Filtering by Integrated RC address. Figure 13 I2C Serial data port control method Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 45 -...
Page 45: Alc
Figure 15 JTAG & ETM(Embedded Trace Module) interface connector In case of KF350 mass production, the JTAG & ETM interface connector will not be mount on board. That is only for developing and software debugging purpose.( It will not be mounted on mass...
Page 46: Audio
3. TECHNICAL BRIEF 3.12 Audio KF350 Audio signal flow diagram as following diagram. PMB8877 9877 BT+ FM Ear M I C Figure 16 Audio signal flow diagram 3.12.1 Audio amplifier Audio amplifier sub system IC is an audio power amplifier capable of delivering 1.2 W of continuous average power into a mono 8ßŸ...
Page 47: Charging Circuit
CHG_EN IMIN R222 IUSB 100K R225 R224 C256 _PPR C257 R223 (1%) (1%) (1%) Figure 19 Charging circuit LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 48 - Only for training and service purposes...
Page 48: Fm Radio & Bluetooth
- WLAN coexistence including 802.15.2 three-wire coexistence support - UART Interface - PCM Interface S Interface C Interface Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 49 - Only for training and service purposes...
Page 49: Only For Training And Service Purposes
• Real time digitized RSSI available on HCI interface • Fast AGC for enhanced dynamic range • Channel classification for AFH LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 50 - Only for training and service purposes...
Page 50: Only For Training And Service Purposes
• Two audio PCM interfaces (input and output) • Analogue stereo (output only) Figure 21. Bluetooth / FM Radio Block Diagram Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 51 - Only for training and service purposes...
Page 51: 18Pin Multi Media Interface Connector
VCHG Charger voltage VCHG Charger voltage N.C. VBUS_USB USB VBUS UART TX data UART RX data Power GND LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 52 - Only for training and service purposes...
Page 52: Only For Training And Service Purposes
R325 UART_RX R327 GB042-44P-H10-E3000 L301 HSO_L C310 100nH L302 HSO_R 100nH C311 Figure 22. MMI 18Pin Connector circuit Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 53 - Only for training and service purposes...
Page 53: Rf Circuit Technical Brief
3. TECHNICAL BRIEF [ RF circuit Technical Brief ] *RF Block Diagram Figure 23 KF350 RF part Block Diagram LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 54 - Only for training and service purposes...
Page 54: General Description
RF oscillator and a three wire bus interface with all necessary control circuits complete the transceiver. Figure 24 RF transceiver PMB6272 SMARTi-PM functional block diagram Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 55 -...
Page 55: Only For Training And Service Purposes
GND1 2 HOT1 26MHz C443 C444 220n 0.1u BT_CLK RF_CLK RF_DA Figure 25 RF transceiver PMB6272 SMARTi-PM schematic LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 56 - Only for training and service purposes...
Page 56: Receiver Part
(depending on the gain setting) to reduce the DC-offset at baseband- output. A programmable gain correction can be applied to correct for front end- and receiver gain tolerances. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 57 -...
Page 57: Transmitter Part
VAPC and an optional bias control pin VBIAS for efficiency enhancement. Figure 27 Transmitter part block diagram LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 58 - Only for training and service purposes...
Page 58: Rf Synthesizer
(XO_TUNE) via the three wire bus (“3Wbus”) X400 NX3225SA GND2 HOT2 GND1 2 HOT1 26MHz Figure 28 DCXO Schematic Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 59 - Only for training and service purposes...
Page 59: Front End Module Control
C406 SW400 RF-800 LMSP43QA-538 100p L406 C407 100nH L404 6.8nH C411 C410 0.5p 0.5p Figure 29 FEM schematic LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 60 - Only for training and service purposes...
Page 60: Power Amplifier Module
DAC. The module has Tx enable, band select, mode (EDGE or GSM) inputs. Module construction is a low-profile over-molded land-grid array on laminate. Table 10 PAM pin description Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 61 -...
Page 61: Mode Selection
GMSK modulation and provides bias optimization for EDGE modulation depending on the state of MODE control. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 62 - Only for training and service purposes...
Page 62: Pam Schematic
C417 C412 C418 C419 C420 TQM7M5005(5x5) 100p 100p 100p 0.01u 0.01u C421 C422 1.5p Figure 30 PAM schematic Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 63 - Only for training and service purposes...
Page 63: Trouble Shooting
- Connect mobile switch cable between Communication test set and DUT when you need to make a phone call. - Follow trouble shooting procedure LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 64 - Only for training and service purposes...
Page 64: Power On Trouble
C249 2.2u Q203 END_KEY_IN 2SC5663 EXTERNAL RESET 2V62_VIO 2V11_RTC EXTRSTn SPOWER_INT PM_INT _RESET PMRSTn C255 U203 0.1u NC7WZ08L8X Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 65 - Only for training and service purposes...
Page 65 S-GOLD3 PLL VRTC 2V11_RTC 2.11V Real Time Clock VAFC VAFC 2.65V Not used VVIB 2V8 _VLCD 2.8V 140mA LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 66 - Only for training and service purposes...
Page 66 Check 3 pin of X400 Or Check 14 pin of U401 Replace main PCB 14pin of U401 X400 U401 3pin of X400 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 67 - Only for training and service purposes...
Page 67: Charging Trouble
OVP_VUSB _EOC _CHG IVDC CHG_EN IMIN R222 IUSB 100K R225 R224 C256 _PPR C257 R223 (1%) (1%) (1%) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 68 - Only for training and service purposes...
Page 68 3.4V? to 3.4V Change the Battery thermistor Battery value retest is about 10K? Charge is operating Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 69 - Only for training and service purposes...
Page 69: Lcd Display Trouble
INOUT_A1 C119 VA310 ICVN0505X150FR Check signal flow via EMI filter Check the connection LCD FPCB Connector Charge Pump LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 70 - Only for training and service purposes...
Page 70 Check solder and Signal is normal on repair DIF Signal Damaged filter FL302, FL304, FL306 Assemble FL302, FL304, FL306 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 71 - Only for training and service purposes...
Page 71: Camera Troublez
CIF_D0 100nH L101 CIF_PCLK 100nH CIF_RESET CIF_PD C106 C107 C108 GB042-24S-H10-E3000 0.1u 0.1u 0.1u Check the connector combination LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 72 - Only for training and service purposes...
Page 72 Camera test with equipped camera module Replace New Replace Camera module Main Working properly? Replace Camera module Assemble Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 73 - Only for training and service purposes...
Page 73: Receiver & Speaker Troublea
INOUT_B3 INOUT_A3 CIF_D6 S-H10-E3000 C319 C320 C321 INOUT_B4 INOUT_A4 CIF_D7 2.2u FL307 ICVE10184E070R101FR C323 SPK_RCV_P C325 SPK_RCV_N C326 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 74 - Only for training and service purposes...
Page 74 4. TROUBLE SHOOTING SPEAKER CN101 SPK_RCV_P SPK_RCV_N C103 C102 C227 C226 U201 C218 C217 Speaker contact Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 75 - Only for training and service purposes...
Page 75 Pin33,32 of sub board Connector Replace FPCB_LCD (CN103) is High? C103,C102 of Replace FPCB_Folder FPCB_Folder are High? Assemble LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 76 - Only for training and service purposes...
Page 76: Microphone Trouble
VA301 VA302 C330 C329 2.2u VMIC_N CN301 MIC100 MAIN_MIC_P MAIN_MIC_N VMIC_P MAIN_MIC_N SPM0204LE5-QB CN301 C329 C328 C327 MIC100 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 77 - Only for training and service purposes...
Page 77 Repair the 44pin 44pin connector conn. (CN301) (CN301)is good? Replace Check Signal C327, microphone C328 (2.5V) (MIC100) Assemble LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 78 - Only for training and service purposes...
Page 78: Vibrator Trouble
100K 0.1u VBAT VB101 C100 PIN3 Check the driver IC(U100) of sub boarad PIN1 Check the vibrator soldering Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 79 - Only for training and service purposes...
Page 79 Check FPCB_LCD Pin1 of U100(VIB_EN) or replace it is high? Pin3 of U100(VIB) is high? Replace Vibrator Assemble LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 80 - Only for training and service purposes...
Page 80: Keypad Back Light Trouble
USB_DM KEY_ROW1 JACK_DETECT KEY_ROW2 RPWRON_EN KEY_ROW3 KEY_ROW4 UART_TX KEY_ROW5 UART_RX KEY_COL0 FLIP KEY_COL1 KEY_BACKLIGHT KEY_COL2 KEY_COL3 KEY_COL5 GB042-44S-H10-E3000 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 81 - Only for training and service purposes...
Page 81 Check TP1 is board 2.62V? Replace 44pin 44pin connector conn. (CN303) is good? (CN101) Replace KEY FPCB Assemble CN101 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 82 - Only for training and service purposes...
Page 82: Sim & Usd Trouble
4. TROUBLE SHOOTING 4.10 SIM & uSD trouble SIM Check Points -Power is working -Socket soldering -Proper SIM is used Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 83 - Only for training and service purposes...
Page 83 2.9V SIM only Resolder pin 6 pins are soldered well? Replace Main Board Check Proper SIM Card Assemble LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 84 - Only for training and service purposes...
Page 84 TF socket pins TP 1~4 is 2.9V are well soldered Signal) Replace Main Board Check proper uSD? Assemble Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 85 - Only for training and service purposes...
Page 85: Photo Senser Trouble
Replace photo high? senser Check and Replace FPCB is Crack? charge pump. (U101) U100(Photo senser) Replace FPCB_Folder and Assemble LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 86 - Only for training and service purposes...
Page 86: Sideview Led Trouble
(2.62V)? FPCB Folder Check and Replace Check TP2 is charge pump. high?(2.62v) (U101) Sideview LED Assemble Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 87 - Only for training and service purposes...
Page 87: Trouble Shooting Of Receiver Part
➂ Check point Mobile SW & FEM ➃ Check point ➂ RX I/Q Signal Re-Download S/W & CAL LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 88 - Only for training and service purposes...
Page 88 X400 NX3225SA GND2 HOT2 GND1 2 HOT1 26MHz TP1 (C439) Figure 3. DCXO Cicuit Figure 4. DCXO Waveform Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 89 - Only for training and service purposes...
Page 89 GND1 2 HOT1 26MHz RF_CLK(TP2) BT_CLK RF_CLK RF_DA RF_EN(TP1) Figure 6. Transceiver Circuit Figure 7. PLL Control Waveform LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 90 - Only for training and service purposes...
Page 90 TP4_R403 (FE2) FL401 TP3_R402 (FE1) Figure 9. Mobile SW & FEM EGSM/GSM850 DCS/PCS Table 2. FEM RX Control Logic Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 91 - Only for training and service purposes...
Page 91 Mobile SW & FEM is OK. Check Antenna. EGSM RX Figure 10 Mobile SW Figure 11 FEM Control Signals LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 92 - Only for training and service purposes...
Page 92 Figure 12. RX I/Q Circuit Checking Points TP1(I) TP4(QX) TP2(IX) TP3(Q) U401 Figure 13. RX I/Q Figure 14. RX I/Q Waveform Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 93 - Only for training and service purposes...
Page 93: Trouble Shooting Of Transmitter Part
Figure 16. Main PCB ➄ Check point PAM Control ➅ ➅ Check FEM & Mobile Re-Download S/W & RF LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 94 - Only for training and service purposes...
Page 94: Checking Vctcxo Circuit
See RX Part “1. Checking DCXO Circuit” 4.14.2. Checking PLL Control Signal See RX Part “2. Checking PLL Control Signal” Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 95 - Only for training and service purposes...
Page 95 Figure 17. TX I/Q Checking Points TP1(I) TP4(QX) TP2(IX) TP3(Q) U401 Figure 18. TX I/Q Figure 19. TX I/Q Waveform LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 96 - Only for training and service purposes...
Page 96 Figure 21. Transceiver Output MODE Transceiver Output GMSK Fixed 8PSK Ramp Burst Control Table 3. Transceiver Output Operation Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 97 - Only for training and service purposes...
Page 97 LBAND_PAM_IN (MODE: GMSK) : TP1 LBAND_PAM_IN (MODE: 8PSK) : TP1 Figure 22. Transceiver Output (GMSK) Figure 23. Transceiver Output (8PSK) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 98 - Only for training and service purposes...
Page 98 PA_LEVEL TXON_PA GMSK Ramp Burst Control HIGH 8PSK HIGH Control Amp bias HIGH Table 4. PAM Mode Operation Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 99 - Only for training and service purposes...
Page 99 TP3(PA MODE) : C418 TP2(TXON_PA) : C417 TP1(PA LEVEL) TP1(PA_LEVEL) : R405 TP2(TXON_PA) : C417 TP2(TXON PA) TP3(PA MODE) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 100 - Only for training and service purposes...
Page 100 TP4_R403 (FE2) FL401 TP3_R402 (FE1) Figure 29 Mobile SW & FEM EGSM/GSM850 DCS/PCS Table 5. FEM TX Control Logic Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 101 - Only for training and service purposes...
Page 101 Mobile SW & FEM is OK. Check Antenna. EGSM TX TP1(ANT SW1) TP2(ANT SW2) Figure 30 Mobile SW Figure 31 FEM Control Signals LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 102 - Only for training and service purposes...
Page 102: Download & S/W Upgrade
5. DOWNLOAD & S/W UPGRADE 5. DOWNLOAD & S/W UPGRADE Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 103 - Only for training and service purposes...
Page 113: Block Diagram
VLED (2.9V) VLED (2.9V) VLED (2.9V) MIC2(P/N) MIC2(P/N) B/UP BAT. B/UP BAT. Figure 1 KF350 Functional block diagram LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 114 - Only for training and service purposes...
Page 114: Circuit Diagram
URXD USB_DM KEY_ROW3 UTXD USB_DP KEY_ROW4 KEY_ROW5 KEY_COL5 C138 C139 KEY_COL0 C140 C141 KEY_COL1 KEY_COL2 KEY_COL3 OJ101 OJ102 Copyright © 2008 LG Electronics. Inc. All right reserved. - 115 - LGE Internal Use Only Only for training and service purposes...
Page 115 PMRSTn IMIN C255 R222 IUSB U203 0.1u 100K R225 R224 C256 NC7WZ08L8X _PPR C257 R223 (1%) (1%) (1%) LGE Internal Use Only - 116 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 116 ICVE10184E070R101FR MMC_DETECT DIF_CD INOUT_B1 INOUT_A1 VA310 2V62_VIO ICVN0505X150FR C322 C323 R335 100K SPK_RCV_P C324 1000p C325 SPK_RCV_N C326 Copyright © 2008 LG Electronics. Inc. All right reserved. - 117 - LGE Internal Use Only Only for training and service purposes...
Page 117 GND3 EWFNLBAXX PCM_SYNC_I2S_WS I2S1_WA0 GND4 PCM_CLK_I2S_CLK I2S1_CLK GND5 PCM_OUT_I2S_OUT I2S1_Rx SC400 GND6 PCM_IN I2S1_Tx PGND1 PGND2 PGND3 PGND4 LGE Internal Use Only - 118 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 118 MLED5 CURR2 VANA_GPI CURR6 DIF_VSYNC MLED5 C118 MLED4 2.2u PHOTO_ADC_IN GPIO DATA MLED3 MLED2 MLED1 MLED GF032-35S-E2000 C119 Copyright © 2008 LG Electronics. Inc. All right reserved. - 119 - LGE Internal Use Only Only for training and service purposes...
Page 119 UART_TX KEY_ROW5 UART_RX KEY_COL0 SW110 FLIP KEY_COL1 UFL-R-SMT10 KEY_BACKLIGHT KEY_COL2 KEY_COL3 L106 KEY_COL5 L105 C113 15nH 0.5p GB042-44S-H10-E3000 LGE Internal Use Only - 120 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 120 LD101 LD102 LD103 LD104 LD105 LED1 LED2 LED3 LED4 LED5 LED6 PHOTO SENSOR 2V9_VFM U100 APDS-9005-020 PHOTO_ADC_IN C101 Copyright © 2007 LG Electronics. Inc. All right reserved. - 121 - LGE Internal Use Only Only for training and service purposes...
Page 121 DIF_MAIN_CS CIF_D7 DIF_MAIN_CS CIF_D7 DIF_CD DIF_CD DIF_VSYNC DIF_VSYNC LCD_ID SPK_RCV_P LCD_ID SPK_RCV_P _DIF_RESET SPK_RCV_N _DIF_RESET SPK_RCV_N GB042-60P-H10-E3000 GB042-60P-H10-E3000 LGE Internal Use Only - 122 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 122: Bga Pin Map
8.BGA PIN MAP 8.BGA PIN MAP BASEBAND (U102, PMB8877) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 123 - Only for training and service purposes...
Page 128: Pcb Layout
GSM Rx Sensitivity & No Display Tx Power No Service No Service U400 PAM GSM Tx Power No Service Copyright © 2008 LG Electronics. Inc. All right reserved. - 129 - LGE Internal Use Only Only for training and service purposes...
Page 129 No BT Connection No Network U204 Charging IC No Charging No Booting No Service CN201 Battery Connector No Power On LGE Internal Use Only - 130 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 130 No moter No display SW400 Antenna switch U101 Charge Pump No Network No Dot matrix No camera No display Copyright © 2007 LG Electronics. Inc. All right reserved. - 131 - LGE Internal Use Only Only for training and service purposes...
Page 131 No display CN101 F-Folder connector CN100 No sound(spk) Dot Matrix Connector No Flash LED No Dot Matrix No Vibrator LGE Internal Use Only - 132 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 133 No Folder on/off detection CN100 18pin connector No charging, No sound Headset, No USB SW1100 Antenna switch No Network LGE Internal Use Only - 134 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 135 No Vibrator CN101 Speaker PAD No sound BAT100 Backup Battery U100 Photo Senser RTC reset No Photo Senser LGE Internal Use Only - 136 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 138: Main Pcb Component Placement
9.PCB LAYOUT 9.PCB LAYOUT Main PCB component placement Main PCB Top Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 139 - Only for training and service purposes...
Page 140 Power Inductor PMIC SIM & uSD Socket BT Antenna Vibrator Driver IC Charging IC (OVP) Mobile Switch Battery Connector Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 141 - Only for training and service purposes...
Page 141 Charge Pump LED Matrix Vibrator Driver LED Control IC Camera Conn. Sideview Conn. LCD Conn. LED Module Conn. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 142 - Only for training and service purposes...
Page 142: Rf Calibration
10.1 Test Equipment Setup 4.00 V 0.000 A 10.2 Calibration Step 10.2.1 Turn on the Phone. 10.2.2 Execute “HK_27.exe” Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 143 - Only for training and service purposes...
Page 143 10. RF CALIBRATION 10.2.3 Click “SETTING” Menu 10.2.4 Setup “Ezlooks” menu such as the following figure LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 144 - Only for training and service purposes...
Page 144 10. RF CALIBRATION 10.2.5 Setup “Line System” menu such as the following figure 10.2.6 Setup Logic operation such as the following figure. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 145 - Only for training and service purposes...
Page 145 10. RF CALIBRATION 10.2.7 Select “MODEL”. 10.2.8 Click “START” for RF calibration 10.2.9 RF Calibration finishes LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 146 - Only for training and service purposes...
Page 146 10. RF CALIBRATION 10.2.10 Calibration data will be saved to the following folder. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 147 - Only for training and service purposes...
Page 147 TX Channel compensation: EGSM->DCS->PCS->EDGE EGSM->EDGE DCS->EDGE PCS RX Channel compensation: EGSM->DCS->PCS 4. Phone Operation Mode < Normal Mode > < ptest Mode > LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 148 - Only for training and service purposes...
Page 148: Stand-Alone Test
3 Confirm EEPROM & Delta file prefix name. ➀ ➁ ➂ 4 Click “Update Info” for communicating Phone and Test-Program. Not Connected ➃ Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 149 - Only for training and service purposes...
Page 149 6 Select “Non signaling” in the Quick Bar menu. Then Standalone Test setup is finished. Change Change“ ptest mood ood ” LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 150 - Only for training and service purposes...
Page 150: Tx Test
3 Select “Tx” in the RF mode menu and “PCL” in the PA Level menu. 4 Finally, Click “Write All” bar and try the efficiency test of Phone. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
Page 151: Rx Test
5 Change the Phone to “normal mode” and then Click the “Reset” bar.\ Change " n n orm rmal m al mode " LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 152 - Only for training and service purposes...
Page 152: Exploded View & Replacement Part List
12. EXPLODED VIEW & REPLACEMENT PART LIST 12.1 EXPLODED VIEW Copyright © 2007 LG Electronics. Inc. All right reserved. - 153 - LGE Internal Use Only Only for training and service purposes...
Page 154: Replacement Parts
SINTERING, (empty), , , , , Color Without MTAK00 TAPE,CAMERA MTAK0013701 SINTERING, (empty), , , , , Color Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 155 - Only for training and service purposes...
Page 155 COMPLEX, (empty), , , , , Color Without MTAB01 TAPE,PROTECTION MTAB0210201 COMPLEX, (empty), , , , , Color LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 156 - Only for training and service purposes...
Page 156 GMEY0010401 1.4 mm,2 mm,MSWR3(FN) ,N ,+ ,NYLOK Silver Without MCCZ00 MCCZ0026901 COMPLEX, (empty), , , , , Color Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 157 - Only for training and service purposes...
Page 157 MPBU0049601 SINTERING, (empty), , , , , Color Without MPBZ01 MPBZ0212401 SINTERING, (empty), , , , , Color LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 158 - Only for training and service purposes...
Page 158 MLAZ00 LABEL MLAZ0038301 PID Label 4 Array Color SC400 FRAME,SHIELD MFEA0021901 PRESS, STS, , , , , Silver Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 159 - Only for training and service purposes...
Page 159: Main Component
,20mA ,1200~1400mcd , ,126mW ,[empty] ,[empty] ,2P WHITE ,ETC ,R/TP ,3.8*1.2*0.6T ,; ,[empty] ,2.9~3.2V LD104 DIODE,LED,CHIP EDLH0013403 ,20mA ,1200~1400mcd , ,126mW ,[empty] ,[empty] ,2P LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 160 - Only for training and service purposes...
Page 160 F-KEY WHITE ,ETC ,R/TP ,SIDEVIEW ,; ,[empty] ,2.9~3.75 LD100 DIODE,LED,CHIP EDLH0013701 ,30mA , , ,120mW ,[empty] ,[empty] ,2P Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 161 - Only for training and service purposes...
Page 161 ECCH0000198 2.2 uF,6.3V ,M ,X5R ,TC ,1005 ,R/TP 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP C117 CAP,CERAMIC,CHIP ECCH0004904 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 162 - Only for training and service purposes...
Page 162 ECCH0000198 2.2 uF,6.3V ,M ,X5R ,TC ,1005 ,R/TP C205 CAP,CERAMIC,CHIP ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 163 - Only for training and service purposes...
Page 163 ECCH0000198 2.2 uF,6.3V ,M ,X5R ,TC ,1005 ,R/TP 2.2 uF,6.3V ,M ,X5R ,TC ,1005 ,R/TP C247 CAP,CERAMIC,CHIP ECCH0000198 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 164 - Only for training and service purposes...
Page 164 ECCH0000122 47 pF,50V,J,NP0,TC,1005,R/TP C329 CAP,CERAMIC,CHIP ECCH0000117 27 pF,50V,J,NP0,TC,1005,R/TP C330 CAP,CERAMIC,CHIP ECCH0000198 2.2 uF,6.3V ,M ,X5R ,TC ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 165 - Only for training and service purposes...
Page 165 R201 RES,CHIP,MAKER ERHZ0000454 27 Kohm,1/16W ,J ,1005 ,R/TP R203 RES,CHIP ERHY0000254 4.7K ohm,1/16W,J,1005,R/TP 4.7K ohm,1/16W,J,1005,R/TP R204 RES,CHIP ERHY0000254 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 166 - Only for training and service purposes...
Page 166 100 Kohm,1/16W ,J ,1005 ,R/TP R332 RES,CHIP,MAKER ERHZ0000406 100 Kohm,1/16W ,J ,1005 ,R/TP R333 RES,CHIP,MAKER ERHZ0000406 100 Kohm,1/16W ,J ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 167 - Only for training and service purposes...
Page 167 ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP C119 CAP,CHIP,MAKER ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 168 - Only for training and service purposes...
Page 168 ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP C221 CAP,CERAMIC,CHIP ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 169 - Only for training and service purposes...
Page 169 ECCH0000901 2.2 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP C429 CAP,CERAMIC,CHIP ECCH0000901 2.2 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 170 - Only for training and service purposes...
Page 170 850,900 ,1800.1900 , dB, dB, dB, dB,4532 ,GSM QUAD FL400 FILTER,SEPERATOR SFAY0008602 FEM FOR RENESAS RFIC L301 INDUCTOR,CHIP ELCH0003842 100 nH,J ,1005 ,R/TP ,MLCI Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 171 - Only for training and service purposes...
Page 171 10 Kohm,1/16W ,F ,1005 ,R/TP R216 RES,CHIP ERHY0000298 3.3M ohm,1/16W,J,1005,R/TP R217 RES,CHIP,MAKER ERHZ0000406 100 Kohm,1/16W ,J ,1005 ,R/TP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 172 - Only for training and service purposes...
Page 172 22 Kohm,1/16W ,F ,1005 ,R/TP NTC ,10000 ohm,SMD ,1005, 3350~3399k, J, R/T, R431 THERMISTOR SETY0006301 PBFREE FR-4 ,0.8 mm,STAGGERED-8 ,KF350 MAIN ,; , , , , , , , , SPFY PCB,MAIN SPFY0179201 FBGA ,107 PIN,ETC ,FULLY 1.8V 1G(LB/64Mx16) U101 EUSY0335803 NAND+512M(DDR/8Mx4x16) SDRAM ,;...
Page 173: Accessory
100-240V ,5060 Hz,5.6 V,.4 A,GOST ,AC-DC Adaptor ,; ADAPTOR,AC-DC SSAD0028502 ,150Vac~350Vac ,5.6V +/-0.8V ,400mA ,5060 , ,WALL 2P ,I/O CONNECTOR , LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 174 - Only for training and service purposes...
Page 174 Note...
Page 175 Note...

LG KF350 Service Manual

1 Introduction

2 General Performance

3 Technical Brief

4 Trouble Shooting

5 Download & S/W Upgrade

6 Block Diagram

7 Circuit Diagram

8 Bga Pin Map

9 Pcb Layout

10 Rf Calibration

11 Stand-Alone Test

12 Exploded View & Replacement Part List

Quick Links

Troubleshooting

Related Manuals for LG KF350

Summary of Contents for LG KF350

Table of Contents