LG KP550 Service Manual

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Internal Use Only

Service Manual

KP502/KP550

Date: June, 2009 / Issue 1.0

Table of Contents

Troubleshooting

Summary of Contents for LG KP550

Page 1 Internal Use Only Service Manual KP502/KP550 Date: June, 2009 / Issue 1.0...
Page 4: Table Of Contents
5.6 Receiver & Speaker trouble ......79 5.7 Microphone trouble ........81 5.8 Vibrator trouble..........83 5.9 Keypad back light trouble.......85 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 5 - Only for training and service purposes...
Page 6: Introduction
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. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 7 -...
Page 7 When returning system boards or parts such as EEPROM to the factory, use the protective package as described. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 8 - Only for training and service purposes...
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 © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 9 - Only for training and service purposes...
Page 9 Voltage Controlled Oscillator VCTCXO Voltage Control Temperature Compensated Crystal Oscillator Wireless Application Protocol 8PSK 8 Phase Shift Keying LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 10 - Only for training and service purposes...
Page 10: 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 © 2009 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 © 2009 LG Electronics. Inc. All right reserved. - 12 - Only for training and service purposes...
Page 12 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 © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 13 - Only for training and service purposes...
Page 13 * 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 © 2009 LG Electronics. Inc. All right reserved. - 14 - Only for training and service purposes...
Page 14 -97dBm ~ -93dBm -100dBm ~ -98dBm Antenna Display -103dBm ~ -101dBm -105dBm ~ -104dBm < -106 dBm No Service Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 15 - Only for training and service purposes...
Page 15 Battery full charge voltage = 4.2 V Capacity: 800mAh Switching-mode charger Travel Charger Input: 150 ~ 240 V, 50/60Hz Out put: 5.6, 0.4A LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 16 - Only for training and service purposes...
Page 16 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 © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 17 - Only for training and service purposes...
Page 17 (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 © 2009 LG Electronics. Inc. All right reserved. - 18 - Only for training and service purposes...
Page 18: Technical Brief
VUMTS(2.85V) VRF3(2.70V) 2V11_RTC HEADSET MIC VVIB(2.8V) VUSB(3.1V) VLED (2.9V) MIC2(P/N) B/UP BAT. Figure 1 KP502 Functional block diagram Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 19 - Only for training and service purposes...
Page 19: Baseband Processor (Bbp) Introduction
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. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 20 - Only for training and service purposes...
Page 20 - 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) Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 21 -...
Page 21 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 © 2009 LG Electronics. Inc. All right reserved. - 22 - Only for training and service purposes...
Page 22 RF block temperature measure JACK_TYPE Accessory type detect H/W VERSION S-Gold3 H/W version detect ICLD VSUPPLY Battery supply voltage measure Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 23 - Only for training and service purposes...
Page 23 PCB_VER2 PCB Version2 MMCI2_CLK VIB_EN Vibrator LDO Enable CAMERA I/F CIF_D0 CIF_D(0) Camera DATA[0] CIF_D1 CIF_D(1) Camera DATA[1] LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 24 - Only for training and service purposes...
Page 24 Bluetooth RTS USIF2_CTS_N UART_BT_CTS Bluetooth CTS USIF3 USIF3 _RXD UART_BT_RX Bluetooth RX USIF3 _TXD UART_BT_TX Bluetooth TX GPIO_21 MMCI2 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 25 - Only for training and service purposes...
Page 25 Touch Sensor INT #I2C1 I2C_SCL I2C_SCL For Touch LDO/PMIC/Audio Amp I2C_SDA I2C_SDA For Touch LDO/PMIC/Audio Amp PM_INT (EINT) PM_INT LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 26 - Only for training and service purposes...
Page 26 MAIN_MIC_P For Mic MICN2 HS_MIC_N For Headset Mic MICP2 HS_MIC_P For Headset Mic VMICP VMIC_P Power for MIC Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 27 - Only for training and service purposes...
Page 27 PIPESTAT[2] PIPESTAT[2] PIPESTAT[1] PIPESTAT[1] PIPESTAT[0] PIPESTAT[0] TRACEPKT[0] TRACEPKT[0] TRACEPKT[1] TRACEPKT[1] TRACEPKT[2] TRACEPKT[2] TRACEPKT[3] TRACEPKT[3] TRACEPKT[4] TRACEPKT[4] TRACEPKT[5] TRACEPKT[5] LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 28 - Only for training and service purposes...
Page 28 MEM_A[23] ADD[23] MEM_A[24] ADD[24] MEM_A[25] ADD[25] MEM_A[26] ADD[26] MEM_CSA0_n ADD[27] MEM_CSA1_n ADD[28] MEM_CSA2_n ADD[29] MEM_CSA3_n MEM_BFCLKO1 MEM_BFCLKO2 SDCLKI Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 29 - Only for training and service purposes...
Page 29 LCD Backlight Enable CC1CC7IO JACK_DETECT Jack Detect GPIO_54 BT_LDO_EN Bluetooth LDO Enable #SPCU SPCU_RQ_IN0 GPIO_118 BT_RESETn Bluetooth Reset LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 30 - Only for training and service purposes...
Page 30 F32K OSC32K OSC32K RESET_n _RESET RTC_OUT RTC_OUT #Extra I/Os CLK32K CLK32K For FM Radio, BT CLK32K DSPOUT1 WDOG Copyright © 2009 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 © 2009 LG Electronics. Inc. All right reserved. - 32 - Only for training and service purposes...
Page 32 - two driver outputs for single LEDs for precharge indication and signaling with i.e. change of colour - driver for Vibra Motor with adjustable voltages, soft startup / shutdown and current limitation SM- POWER offers several control functions Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 33 -...
Page 33 30mA S-GOLD3 PLL VRTC 2V11_RTC 2.11V Real Time Clock VAFC VAFC 2.65V Not used VVIB 2V8_CAM_A 2.8V 140mA LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 34 - Only for training and service purposes...
Page 34 IOUT IUSB ISL9221 ZXCT1010E5TA EUSY0286901 EUSY0351601 HSBC- 3P30- 18 ENZY0019401 Figure 4 SM-Power Circuit Diagram with charging part Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 35 - Only for training and service purposes...
Page 35 -5°C ~ 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 © 2009 LG Electronics. Inc. All right reserved. - 36 - Only for training and service purposes...
Page 36: Power On/Off
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 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 37 -...
Page 37 Q200 KTC4075E ) 2 ( U203 EMX18 N0013701 Figure 7 Remote power on and End-key power on circuit LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 38 - Only for training and service purposes...
Page 38: Sim & Usd Interface
SD & SIM(Hybrid Socket) VSIM_2V9 VMME_2V9 VIO_2V62 U202 1743733- 2 ENSY0017901 Figure 8 SIM & Micro SD Circuit Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 39 - Only for training and service purposes...
Page 39 Data bit [3] Command response Power Power supply Clock Ground Power ground DAT0 Data bit [0] DAT1 Data bit [1] LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 40 - Only for training and service purposes...
Page 40: Memory
VDD2 _RAS VDD3 _CAS _WED VDDQ1 TP205 VDDQ2 Figure 9 Flash memory & DDR RAM MCP circuit diagram Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 41 - Only for training and service purposes...
Page 41: Lcd Display
- Backlight : 5 piece of white LED LCD FPC Interface Spec: Table 9 LCD FPC Interface Spec. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 42 - Only for training and service purposes...
Page 42: Keypad Switching & Scanning
SEND ) 3 ( VBAT ) 3 ( ) 5 ( Figure 10 Key pad part key matrix Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 43 - Only for training and service purposes...
Page 43: Keypad Back-Light Illumination
SM-Power Flash LED port which has constant current control function. The whole configuration of the SM-POWER Flash LED drivers is shown in below Figure11. Figure 11 Keypad Back-light LEDs LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 44 - Only for training and service purposes...
Page 44: Lcd Back-Light Illumination
OUTCP EN_SET PGND AAT3169IFO- T1 EUSY0336502 Figure 12 LCD Back light unit and Flash LED charge pump IC Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 45 - Only for training and service purposes...
Page 45 The protocol for using this interface is described in the following subsection. Figure 13 I2C Serial data port control method LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 46 - Only for training and service purposes...
Page 46: Jtag & Etm Interface Connector
In case of KP502 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 production PCB) Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 47 -...
Page 47: Audio
KP502 Audio signal flow diagram as following diagram. PMB8877 9877 BT+FM EarMI C Figure 16 Audio signal flow diagram LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 48 - Only for training and service purposes...
Page 48 VBAT U200 INA2 MAX9877AEWP_TG45 INA1 EUSY0360201 INB2 INB1 OUT+ BIAS OUT- RXIN+ RXIN- Figure 17 Audio amplifier PMIC Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 49 - Only for training and service purposes...
Page 49 SPM0204HE5- PB- 3 SUMY0010603 ) 3 ( ) 5 ( AXK820145WG ENBY0020101 SEVY0003901 EVL5M02200 Figure 18 Microphone circuit LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 50 - Only for training and service purposes...
Page 50: Charging Circuit
VCHG_OVP PGND VDC_BYP VUSB TP400 _PPR USB_BYP _CHG IVDC TP401 IMIN IUSB ISL9221 EUSY0351601 Figure 19 Charging circuit Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 51 - Only for training and service purposes...
Page 51: Fm Radio & Bluetooth
• WLAN coexistence including 802.15.2 three-wire coexistence support • UART Interface • PCM Interface • I2S Interface • I2C Interface LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 52 - Only for training and service purposes...
Page 52 • Real time digitized RSSI available on HCI interface • Fast AGC for enhanced dynamic range • Channel classification for AFH Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 53 - Only for training and service purposes...
Page 53 • Two audio PCM interfaces (input and output) • Analogue stereo (output only) Figure 21. Bluetooth / FM Radio Block Diagram LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 54 - Only for training and service purposes...
Page 54: 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 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 55 - Only for training and service purposes...
Page 55 HSEJ- 18S04- 25PC ENRY0006501 Close to 18Pin Conn. Figure 22. MMI 18Pin Connector circuit LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 56 - Only for training and service purposes...
Page 56: Tri-Axial, Digital Acceleration Sensor
3mm x 3mm x 0.9mm QFN package. Axes orientation of the BMA150 THREE- AXIS ACCELEROMETER VIO_2V62 U302 I _ L BMA150 EUSY0345201 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 57 - Only for training and service purposes...
Page 57 3. TECHNICAL BRIEF RF Block Diagram Mobile Switch PAM(SKY77340) Figure 23 KF500 RF part Block Diagram LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 58 - Only for training and service purposes...
Page 58: 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 © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 59 -...
Page 59 VRF_2V85 X600 TSX- 3225 HOT2 3 GND2 1 HOT1 GND1 26MHz Figure 25 RF transceiver PMB6272 SMARTi-PM schematic LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 60 - Only for training and service purposes...
Page 60: Receiver Part
Furthermore an automatic DC-offset compensation can be used (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 © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 61 -...
Page 61: Transmitter Part
PGA s as described above. Figure 27 Transmitter part block diagram LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 62 - Only for training and service purposes...
Page 62: Rf Synthesizer
(XO_TUNE) via the three wire bus (“3Wbus”) VRF_2V85 X600 TSX- 3225 HOT2 3 GND2 1 HOT1 GND1 26MHz Figure 28 DCXO Schematic Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 63 - Only for training and service purposes...
Page 63: Front End Module Control
Tx 1GHz Tx 2GHz Rx 1GHz Rx 2GHz VRF_2V85 GND600 GND601 FL600 DGM1110M014 SW600 SFAY0011101 Figure 29 FEM schematic LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 64 - Only for training and service purposes...
Page 64: Power Amplifier Module
REVD2 Reserved *10,11,13-15 Ground DCS/PCS_OUT RF Output(DCS/PCS) DC Blocked GND PAD GRID Ground pad grid is device underside. Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 65 - Only for training and service purposes...
Page 65: Pam Schematic
GSM_IN GND4 VRAMP RSVD2 VBATT GND3 RSVD1 GND2 GND1 DCS_PCS_IN DCS_PCS_OUT MODE SKY77340 SMPY0012301 Figure 30 PAM schematic LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 66 - Only for training and service purposes...
Page 66: Pcb Layout
4. PCB layout 4. PCB layout 4.1 Main PCB component placement Main PCB Top placement Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 67 - Only for training and service purposes...
Page 68: Trouble Shooting
- Connect mobile switch cable between Communication test set and DUT when you need to make a phone call. - Follow trouble shooting procedure Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 69 -...
Page 69: Power On Trouble
- Outputs of LDOs from PMIC Power On RTC_2V11 U203 EMX18 EQBN0013701 VIO_2V62 External Reset RTC_2V11 U204 NC7WZ08L8X EUSY0102802 LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 70 - Only for training and service purposes...
Page 70 S-GOLD3 PLL VRTC VRTC_2V11 2.11V Real Time Clock VAFC VAFC 2.65V Not used VVIB CAM_A_2V8 2.8V 140mA Camera Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 71 - Only for training and service purposes...
Page 71 Check 1 pin of X600 Or Check C638 of U601 Replace main PCB C638 of U601 U601 1 Pin X600 LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 72 - Only for training and service purposes...
Page 72: Charging Trouble
VBAT VBUS_OVP VCHG U401 VCHG_OVP PGND VDC_BYP VUSB TP400 _PPR USB_BYP _CHG IVDC TP401 IMIN IUSB ISL9221 EUSY0351601 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 73 - Only for training and service purposes...
Page 73 Battery is about 68K? After check thermistor Charge is operating U401 TP1: Source pin U401 TP2: Output pin LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 74 - Only for training and service purposes...
Page 74: Lcd Display Trouble
- Check the connection LCD FPCB Connector(CN502) - Check signal flow via EMI filter (FL503, FL504, FL505) FL505 FL504 FL503 FL504 Charge Pump(U500) Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 75 - Only for training and service purposes...
Page 75 Is LCD FPCB normal? Check solder and Signal is normal on repair DIF Signal Damaged filter FL503, FL504, FL505 Assemble LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 76 - Only for training and service purposes...
Page 76: Camera Trouble
GB042- 24S- H10- E3000 U501 STBY BGND VOUT BH18LB1WHFV EUSY0223006 - Check the connector combination(CN500) CN500 4 Pin U501 CMA_A_2V8 (FB500) Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 77 - Only for training and service purposes...
Page 77 Camera test with equipped camera module Replace New Replace Camera module Main Working properly? Replace Camera module Assemble LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 78 - Only for training and service purposes...
Page 78: Receiver & Speaker Trouble
INB2 INB1 OUT+ BIAS OUT- RXIN+ RXIN- Receiver & Speaker CN400 24- 8000- 002- 000- 829 ENEY0003801 U200 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 79 - Only for training and service purposes...
Page 79 Output Signal is Replace Audio High(TP3 C212, AMP(U200). TP4 C213)? Signal is Replace L400 , L403 High(L400, L403)? Assemble LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 80 - Only for training and service purposes...
Page 80: Microphone Trouble
MIC101 ) 3 ( SPM0204HE5- PB- 3 SUMY0010603 ) 3 ( ) 5 ( AXK820145WG ENBY0020101 SEVY0003901 EVL5M02200 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 81 - Only for training and service purposes...
Page 81 (CN501)is good? Replace Check Signal microphone TP1, TP2 (2.5V)? (MIC101) Replace KEY FPCB Check All of CN101 solder? Assemble LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 82 - Only for training and service purposes...
Page 82: Vibrator Trouble
EUSY0140901 24- 8000- 002- 000- 829 BYPASS ENEY0003801 EUSY0349001 U305 2 IN_B IN_A OUT_Y TC7SZ86FU EUSY0140901 U301 U304 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 83 - Only for training and service purposes...
Page 83 Check Vibrator contacts are clear Replace U100 TP1(VIB_EN) is high? Replace U301 TP2 is 3.0V? Replace Vibrator Assemble LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 84 - Only for training and service purposes...
Page 84: Keypad Back Light Trouble
- Signal path is connected well Main FPCB KEY Backlight LED TP500 Q300 KTC4075E EQBN0007601 CN501 KEY LED KEY FPCB VBAT CN101 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 85 - Only for training and service purposes...
Page 85 2.62V? 20pin connector Replace 20pin (Main CN501, KEY conn. FPCBCN101) is (CN501, CN101) good? Replace KEY FPCB Assemble LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 86 - Only for training and service purposes...
Page 86: Sim & Usd Trouble
5.10 SIM & uSD trouble SIM Check Points - Power is working - Socket soldering - Proper SIM is used Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 87 - Only for training and service purposes...
Page 87 2.9V SIM only Resolder pin 6 pins are soldered well? Replace Main Board Check Proper SIM Card Assemble LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 88 - Only for training and service purposes...
Page 88 MMC_DETECT SIGNAL Card insert Card Deject micro SD & SIM(Hybrid Socket) VSIM_2V9 VMME_2V9 VIO_2V62 U202 1743733- 2 ENSY0017901 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 89 - Only for training and service purposes...
Page 89 TF socket pins TP 1~4 is 2.9V are well soldered Signal) Replace Main Board Check proper uSD? Assemble LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 90 - Only for training and service purposes...
Page 90: Touch Pad Trouble
- Touch driver IC soldering` - Touch FPCB Crack TOUCH SCREEN DRIVER IC VFM_2V9 TSC2007IYZGR U502 EUSY0337101 CN503 VDD_REF PENIRQ- AXK7L10227G ENBY0018601 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 91 - Only for training and service purposes...
Page 91 Check the Touch FPCB is Crack? window FPCB connection Replace Touch window with Front Case U502 (touch driver IC) LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 92 - Only for training and service purposes...
Page 92: Rtc Trouble
Check TP1 is high (1.0V)? Change R500 or Check RTC_2V11 Change U300, is high?(2.0v) Change Main PCB Assemble Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 93 - Only for training and service purposes...
Page 93: Tri-Axial, Digital Acceleration Sensor Trouble.94
Check TP1 is Change Main PCB high (2.6V)? Acceleration sensor operated Change R500 Check TP2 is high?(2.6v) Assemble LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 94 - Only for training and service purposes...
Page 94: Trouble Shooting Of Receiver Part
Check point PLL Control Check point Mobile SW & FEM Check point RX I/Q Signal Re-Download S/W & CAL Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 95 - Only for training and service purposes...
Page 95 X600 TSX- 3225 HOT2 3 TP1 (C638) GND2 1 HOT1 GND1 26MHz Figure 3. DCXO Cicuit Figure 4. DCXO Waveform LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 96 - Only for training and service purposes...
Page 96 X600 TSX- 3225 HOT2 3 GND2 1 HOT1 GND1 26MHz Figure 6. Transceiver Circuit Figure 7. PLL Control Waveform Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 97 - Only for training and service purposes...
Page 97 TP5 ~ 8 TP3_C604 (FE1) FL600 Figure 9. Mobile SW & FEM EGSM/GSM850 DCS/PCS Table 2. FEM RX Control Logic LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 98 - Only for training and service purposes...
Page 98 Mobil e SW & FEM is OK. Check Antenna. EGSM TX TP2(ANT SW2) TP1(ANT SW1) Figure 30 Mobile SW Figure 31 FEM Control Signals Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 99 - Only for training and service purposes...
Page 99 Re-Download S/W and Cal TP2(IX) Figure 12. RX I/Q Circuit Checking Points Figure 13. RX I/Q Figure 14. RX I/Q Waveform LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 100 - Only for training and service purposes...
Page 100: Trouble Shooting Of Transmitter Part
See RX Part “1. Checking DCXO Circuit” 5.15.2. Checking PLL Control Signal See RX Part “2. Checking PLL Control Signal” Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 101 - Only for training and service purposes...
Page 101 TP2(IX) Figure 17. TX I/Q Checking Points Checking Points Figure 18. TX I/Q Figure 19. TX I/Q Waveform LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 102 - Only for training and service purposes...
Page 102 Figure 21. Transceiver Output MODE Transceiver Output GSMK Fixed 8PSK Ramp Burst Control Table 3. Transceiver Output Operation Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 103 - Only for training and service purposes...
Page 103 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 © 2009 LG Electronics. Inc. All right reserved. - 104 - Only for training and service purposes...
Page 104 MODE PA_LEVEL TXON_PA MODE MODE PA_LEVEL TXON_PA GMSK Ramp Burst Control HIGH 8PSK HIGH Control Amp bias HIGH Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 105 - Only for training and service purposes...
Page 105 TP3(PA MODE) : R605 TP2(TXON_PA) : R602 TP1(PA LEVEL) TP1(PA_LEVEL) : R403 TP2(TXON_PA) : R602 TP2(TXON PA) TP3(PA MODE) LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 106 - Only for training and service purposes...
Page 106 SW600 TP3_R604 (FE1) FL600 Figure 29 Mobile SW & FEM EGSM/GSM850 DCS/PCS Table 5. FEM TX Control Logic Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 107 - Only for training and service purposes...
Page 107 Mobil e SW & FEM is OK. Check Antenna. EGSM TX TP2(ANT SW2) TP1(ANT SW1) Figure 30 Mobile SW Figure 31 FEM Control Signals LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 108 - Only for training and service purposes...
Page 108: Download & S/W Upgrade
6. DOWNLOAD & S/W UPGRADE 6. DOWNLOAD & S/W UPGRADE KP502 KP502 KP502 Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 109 - Only for training and service purposes...
Page 115 6. DOWNLOAD & S/W UPGRADE KP502 KP502 KP502 KP502 KP502 KP502 KP502 LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 116 - Only for training and service purposes...
Page 120: Circuit Diagram
UART1 J- TAG VSUPPLY 2.5G VCHAR ON_SW ON_SW VBAT VBAT URXD UTXD TRACE32(20 Pin) TP_GND VIO_2V62 VIO_2V62 UART_TP - 121 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 121 1743733- 2 ) 6 ( RTC_2V11 ENSY0017901 Q200 KTC4075E U204 ) 2 ( U203 EMX18 EQBN0013701 NC7WZ08L8X EUSY0102802 - 122 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 122 TC7SZ86FU _SHUTDOWN EUSY0140901 24- 8000- 002- 000- 829 BYPASS ENEY0003801 EUSY0349001 U305 2 IN_B IN_A OUT_Y TC7SZ86FU EUSY0140901 - 123 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 123 VDDFM1 A_GPIO4 VDDFM2 TP404 A_GPIO3 VDDFM3 TP405 A_GPIO2 VDDFM4 TP406 A_GPIO1 VDDFM5 TP407 A_GPIO0 VDDO33_1 VDDO33_2 RST_N VDDO33_3 - 124 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 124 INOUT_B1 TP509 a f r GB042- 40S- H10- E3000 TSC2007IYZGR U502 ENBY0036001 EUSY0337101 CN503 VDD_REF PENIRQ- AXK7L10227G ENBY0018601 - 125 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 125 PMB6272 HBAND_PAM_IN EUSY0274801 VRF_1V5 VRF_2V85 X600 TSX- 3225 HOT2 3 GND2 1 HOT1 GND1 26MHz SC600 MFEA0023001 MFEA0023001 - 126 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 126 ) 2 ( SEVY0003901 EVL5M02200 SEND ) 3 ( ) 3 ( ) 5 ( KEY LED VBAT VBAT - 127 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 134: Pcb Layout
-no KEY LED On -no Service -Reset U201 : Memory -no booting CN402 : Battery conn. -no Power On KP502 - 135 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 135 -RTC Reset CN502 : LCD conn. -no Display U500 : Chargepump -no Display -no LCD Backlight LED On KP502 - 136 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 136 9. PCB LAYOUT END : Power On -no Power On MIC101 : MIC -no Sound(MIC) - 137 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 137 CN101 : KEY FPCB conn. -no booting -no Power On -no KEY LED On -no Side Key -no Multi Key - 138 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 138: 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_34.exe” Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 139 - Only for training and service purposes...
Page 139 10. RF Calibration 10.2.3 Click “SETTING” Menu KP502 10.2.4 Setup “Ezlooks” menu such as the following figure LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 140 - Only for training and service purposes...
Page 140 PWR: Power supply 1. By-Pass: not control by GPIB CELL: Call Test Equipment 2. Normal: control by GPIB Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 141 - Only for training and service purposes...
Page 141 10. RF Calibration 10.2.7 Select “MODEL” 10.2.8 Click “START” for RF calibration KP502 10.2.9 RF Calibration finishes. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 142 - Only for training and service purposes...
Page 142 RX Channel compensation: EGSM → GSM850 → DCS → PCS 4. Phone Operation Mode < Normal Mode > < Ptest Mode> Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 143 - Only for training and service purposes...
Page 143: Stand-Alone Test
3 Confirm EEPROM & Delta file prefix name. 4 Click “Update Info” for communicating Phone and Test-Program. Not Connected LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 144 - Only for training and service purposes...
Page 144 “Reset” bar. 6 Select “Non signaling” in the Quick Bar menu. Then Standalone Test setup is finished. Change " p p test mood" Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 145 - Only for training and service purposes...
Page 145: 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. LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 146 - Only for training and service purposes...
Page 146: Rx Test
4 The Phone must be changed “normal mode” after finishing Test. 5 Change the Phone to “normal mode” and then Click the “Reset” bar. Change "normal mode " Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 147 -...
Page 148: Exploded View & Replacement Part List
12.1 EXPLODED VIEW 30 31 60 21 22 23 24 19 20 12 13 14 50 52 54 - 149 - Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 150: Replacement Parts
BLACK AFBZ00 FRAME ASSY AFBZ0008902 BLACK MBJL00 BUTTON,SIDE MBJL0066002 MOLD, PC LUPOY SC-1004A, , , , , BLACK Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 151 - Only for training and service purposes...
Page 151 COMPLEX, (empty), , , , , BROWN Without MTAB00 TAPE,PROTECTION MTAB0254701 COMPLEX, (empty), , , , , Color LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 152 - Only for training and service purposes...
Page 152 PRESS, STS, 0.15, , , , BROWN WITHOUT MFEA00 FRAME,SHIELD MFEA0023001 COMPLEX, (empty), , , , , COLOR Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 153 - Only for training and service purposes...
Page 153 VIBRATOR,MOTOR SJMY0008511 , , , 3.0 ,-5 dBd,, ,internal, GSM850/900/1800/1900 ,; ,QUAD SNGF00 ANTENNA,GSM,FIXED SNGF0040801 ,-5.0 ,50 ,3.0 LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 154 - Only for training and service purposes...
Page 154 ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP C122 CAP,CERAMIC,CHIP ECCH0000182 0.1 uF,10V ,K ,X5R ,HD ,1005 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 155 - Only for training and service purposes...
Page 155 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP C223 CAP,CERAMIC,CHIP ECCH0000155 10 nF,16V,K,X7R,HD,1005,R/TP C224 CAP,CHIP,MAKER ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 156 - Only for training and service purposes...
Page 156 ECCH0000198 2.2 uF,6.3V ,M ,X5R ,TC ,1005 ,R/TP C326 CAP,CERAMIC,CHIP ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 157 - Only for training and service purposes...
Page 157 ECCH0000195 3.9 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP C619 CAP,CERAMIC,CHIP ECCH0000120 39 pF,50V,J,NP0,TC,1005,R/TP C620 CAP,CERAMIC,CHIP ECCH0000120 39 pF,50V,J,NP0,TC,1005,R/TP LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 158 - Only for training and service purposes...
Page 158 FB301 FILTER,BEAD,CHIP SFBH0001003 220 ohm,2012 , FB400 FILTER,BEAD,CHIP SFBH0008105 1800 ohm,1005 ,Chip bead ,; ,1800ohm ,; ,[empty] ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 159 - Only for training and service purposes...
Page 159 9100 ohm,1/16W ,J ,1005 ,R/TP R106 RES,CHIP,MAKER ERHZ0000203 10 Kohm,1/16W ,F ,1005 ,R/TP R107 RES,CHIP,MAKER ERHZ0000404 1 Kohm,1/16W ,J ,1005 ,R/TP LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 160 - Only for training and service purposes...
Page 160 4700 ohm,1/16W ,J ,1005 ,R/TP R408 RES,CHIP,MAKER ERHZ0000469 36 ohm,1/16W ,J ,1005 ,R/TP R409 RES,CHIP,MAKER ERHZ0000469 36 ohm,1/16W ,J ,1005 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 161 - Only for training and service purposes...
Page 161 SEVY0005402 5.6 V, ,SMD ,1005 Siez , 50pF VA404 VARISTOR SEVY0005402 5.6 V, ,SMD ,1005 Siez , 50pF LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 162 - Only for training and service purposes...
Page 162 ECCH0000179 22 nF,16V ,K ,X5R ,HD ,1005 ,R/TP C340 CAP,CHIP,MAKER ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 163 - Only for training and service purposes...
Page 163 100000 pF,16V ,Z ,X7R ,TC ,1005 ,R/TP , , ,[empty] C440 CAP,CHIP,MAKER ECZH0004402 ,[empty] ,[empty] ,[empty] ,[empty] ,[empty] LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 164 - Only for training and service purposes...
Page 164 10 PIN,.4 mm,STRAIGHT , ,H=0.9, SOCKET BOARD FB405 FILTER,BEAD,CHIP SFBH0000903 600 ohm,1005 , FB406 FILTER,BEAD,CHIP SFBH0000903 600 ohm,1005 , Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 165 - Only for training and service purposes...
Page 165 2 Kohm,1/16W ,J ,1005 ,R/TP R217 RES,CHIP ERHY0000298 3.3M ohm,1/16W,J,1005,R/TP R220 RES,CHIP,MAKER ERHZ0000406 100 Kohm,1/16W ,J ,1005 ,R/TP LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 166 - Only for training and service purposes...
Page 166 SAFP0000501 SHORT R504 RES,CHIP,MAKER ERHZ0000406 100 Kohm,1/16W ,J ,1005 ,R/TP R505 RES,CHIP,MAKER ERHZ0000406 100 Kohm,1/16W ,J ,1005 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 167 - Only for training and service purposes...
Page 167 14 V, ,SMD ,50pF, 1005 VA511 VARISTOR SEVY0001001 14 V, ,SMD ,50pF, 1005 VA512 VARISTOR SEVY0001001 14 V, ,SMD ,50pF, 1005 LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. - 168 - Only for training and service purposes...
Page 168 Note...

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