Page 1 Internal Use Only Service Manual GS290 Date: March, 2010 / Issue 1.0...
Page 2: Table Of Contents
4.1 Trouble shooting test setup .............62 4.2 Power on Trouble ................6 4. Charging trouble ................66 4.4 LCD display trouble ..............68 - - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 4: Introduction
Therefore, note that unauthorized alternations or repair may affect the regulatory status of the system and may void any remaining warranty. LG Electronics LGE Property 7/136 - 5 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 5 When returning system boards or parts such as EEPROM to the factory, use the protective package as described. LG Electronics LGE Property 8/136 - 6 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 6: Abbreviations
Radio Frequency Receiving Loudness Rating Root Mean Square Real Time Clock Surface Acoustic Wave - 7 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 9/136...
Page 7 Universal Asynchronous Receiver/Transmitter Voltage Controlled Oscillator DCXO Digitally Controled Crystal Oscillator Wireless Application Protocol 8PSK 8 Phase Shift Keying - 8 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 8: Performance
Buzzer Voice Recoding C-Mic Receiver Travel Adapter Options Bluetooth hands-free kit, Data Kit LG Electronics LGE Property 11/136 - 9 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 9: Technical Specification
±4dB 18 dBm ±3dB 2 dBm ±5dB 16 dBm ±3dB 0 dBm ±5dB - 10 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. LG Electronics LGE Property 12/136 Only for training and service purposes...
Page 10 (due to switching DCS1800/PCS1900 transient) Offset from Carrier (kHz) Max. (dBm) 1,200 1,800 - 11 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only LG Electronics LGE Property 13/136 Only for training and service purposes...
Page 11 Max. level in the range. STMR 13 5 dB Stability Margin > 6 dB - 12 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. LG Electronics LGE Property Only for training and service purposes 14/136...
Page 12 2. Test distance set as 50 cm Fast Charge : < 650 mA Charge Current Slow Charge: < 120 mA - 1 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property...
Page 13 Switching-mode charger Travel Charger Input: 150 240 V, 50/60Hz Out put: 5.1, 0.7A - 14 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 16/136...
Page 14 (due to modulation) 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 - 15 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 17/136...
Page 15 (due to switching transient) DCS1800, PCS1900 Offset from carrier(kHz) Max. dBm 1,200 1,800 - 16 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 18/136...
Page 16: Technical Brief
The functional component arrangement is mentioned below diagram. Figure 1 GS290 Functional block diagram LG Electronics LGE Property 19/136 - 17 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 17: Baseband Processor (Bbp) Introduction
Figure 2 Top level block diagram of the S-GOLD3 (PMB8877) S-GOLD3 Product Specification Version 3.0, 2005-05-31 LG Electronics LGE Property 20/136 - 18 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 20/136...
Page 18: General Description
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. - 19 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 19 - Programmable clock output for a camera - An multimedia/Secure Digital Card Interface (MMCI/SD:SDIO capable) - 20 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property...
Page 20 PA MODE PAM Mode select 3.2.5. USIF Interface GS290 have three USIF Drivers as follow : - USIF1 : Hardware Flow Control / SW upgrade / Calibration - USIF2 : Not used Rx, Tx and CTS, RTS use BT Interface...
Page 21 Battery temperature measure RF_TEMP RF block temperature measure VSUPPLY Battery supply voltage measure - 22 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 24/136...
Page 22 3.2.7. GPIO map 3.2.7. GPIO map Over a hundred allowable resources, GS290 is using as follows except dedicated to SIM and Memory. GS290 GPIO(General Purpose Input/Output) Map, describing application, I/O state, and enable level, is shown in below Over a hundred allowable resources, GS290 is using as follows except dedicated to SIM and Memory. GS290...
Page 23 Vibrator enable I2C_SCL I2C_SCL For PMIC/Amp/Touch/MUIC I2C_SDA I2C_SDA For PMIC/Amp/Touch/MUIC PM_INT (EINT) PM_INT - 24 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. LG Electronics LGE Property 26/136 Only for training and service purposes...
Page 24 EAR_N For Receiver EPP1 EAR_P For Receiver EPPA1 BBP_SND_L For Speaker EPREF Reference - 25 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 27/136...
Page 25 MON1 MON2 MON2 TRACESYNC TRACESYNC TRACECLK TRACECLK PIPESTAT[2] PIPESTAT2 PIPESTAT[1] PIPESTAT1 PIPESTAT[0] PIPESTAT0 - 26 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. LG Electronics LGE Property 28/136 Only for training and service purposes...
Page 26 ADD (2) MEM _A[3] ADD (3) MEM _A[4] ADD (4) MEM _A[5] ADD (5) - 27 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only LG Electronics LGE Property 29/136 Only for training and service purposes...
Page 27 MEM _BFCLKI BFCLKI For Burst mode MEM _CKE Memory FCDP_RBn FCDP TDMA I/F - 28 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. LG Electronics LGE Property 30/136 Only for training and service purposes...
Page 28 32k crystal RESET_n _RESET TRIG_OUT TRIG_OUT RTC_OUT RTC_OUT VCXO_EN VCXO_EN GPIO_61 GPIO_62 GPIO_63 - 29 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 31/136...
Page 29: Power Management Ic
• VQFN 48 package with heat sink and non-protruding leads • Compatible with the Infineon E-GOLD+ V2 and V3 - 0 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property...
Page 30 – 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 - 1 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 31 VAFC VAFC 2.65V Not used VVIB 2V8_VLCD 2.8V 140mA VVIB 2V8_VLCD 2.8V 140mA - 2 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 34/136...
Page 32 C210 C212 C224 GU073-5P-SD-E1500 (645mA) (105mA) Figure 4 charging part Figure 4 charging part - - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only LG Electronics LGE Property LG Electronics LGE Property 35/136 35/136...
Page 33 Stand by : 3 min b. Dedicated : 1 min 11. Switch-off voltage : 3.35 V - 4 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 36/136...
Page 34: Power On/Off
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 (6), GS290 system recognize whether remote power on or End-key pushed - 5 - Copyright ©...
Page 35: Sim & Usd Interface
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 (6), GS290 system recognize whether remote power on or End-key pushed...
Page 36 Figure 7 Remote power on and End-key power on circuit 3.5. SIM & uSD interface GS290 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 37 DAT1 Data bit [1] DAT1 Data bit [1] LG Electronics - 8 - LGE Property LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. 39/136 LG Electronics LGE Property Only for training and service purposes 39/136...
Page 38: Memory
GS290 Operational Description Revision B 3.6. Memory 2Gbit NAND & 1Gbit DDRSDRAM employed on GS290 with 8 & 16 bit parallel data bus thru ADD(0) ~ ADD(29). 3.6. Memory The 512Mbit Nand Flash memory with DDRAM stacked device family offers multiple high-performance solutions.
Page 39: Lcd Display
- Backlight : 5 piece of white LED LCD FPC Interface Spec: Table 7. LCD FPC Interface Spec. LG Electronics LGE Property 41/136 - 40 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 40: Keypad Switching & Scanning
VA413 VA411 VA407 VA412 EVLC5S0250 EVLC5S0250 Figure 10 Key pad part key matrix LG Electronics LGE Property 42/136 - 41 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 41: Keypad Back-Light Illumination
LD404 LD403 LD402 LD401 LD400 KEY_BL VA405 EVL5M02200 Figure 11 Keypad Back-light LEDs - 42 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 43/136...
Page 42: Lcd Back-Light Illumination
Figure 13 I2C Serial data port control method Figure 13 I2C Serial data port control method - 4 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics...
Page 43: Audio
3. TECHNICAL BRIEF GS290 Operational Description Revision B 3.11. Audio GS290 Audio signal flow diagram as following diagram. Figure 14 Audio signal flow diagram - 44 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved.
Page 44 SPM0410LR5H-QB 100n C322 C318 C314 C307 VA300 VA302 VMIC_N Figure 16 Microphone circuit - 45 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 46/136...
Page 45: Charging Circuit
VSS2 IFULL EN_SET _CHG_EN C210 C212 C224 (645mA) (105mA) Figure 17 Charging circuit - 46 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 47/136...
Page 46: Fm Radio & Bluetooth
- WLAN coexistence including 802.15.2 three-wire coexistence support - UART Interface - PCM Interface - I2S Interface - I2C Interface - 47 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 48/136...
Page 47 100n C384 ANT303 D300 VA308 EVLC18S02015 EDTY0008606 C368 R342 330p Figure 18. Bluetooth / FM Radio Circuit Diagram - 48 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 48 • I2C slave for FM • Two audio PCM interfaces (input and output) • Analogue stereo (output only) - 49 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics...
Page 49 Revision B 3. TECHNICAL BRIEF Figure 19. Bluetooth / FM Radio Functional Block Diagram LG Electronics LGE Property 51/136 - 50 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 50: Pin U-Usb Interface Connector
VBUS 5pin Micro UART USB connector Earphone Figure 20. u-USB Connector Block Diagram - 51 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 52/136...
Page 51 The MAX14526 will also detect USB chargers including dedicated chargers (D+/D- shorted) and high power host/hub chargers. - 52 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property...
Page 52 Figure 22 GS290 RF part Block Diagram LG Electronics LGE Property 54/136 LG Electronics LGE Property 54/136 LG Electronics LGE Property 54/136 - 5 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 53: General Description
Figure 23 RF transceiver PMB6272 SMARTi-PM functional block diagram - 54 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 55/136...
Page 54 C518 220n 0.1u CLK26M RF_CLK RF_DA Figure 24 RF transceiver PMB6272 SMARTi-PM schematic LG Electronics LGE Property 56/136 - 55 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 55: Receiver Part
DC-offset at baseband-output. A programmable gain correction can be applied to correct for front end- and receiver gain tolerances. - 56 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property...
Page 56: Transmitter Part
In 8PSK mode, the ramping functionality is assured by an on-chip ramping generator, whereas output power is controlled by the PGA’s as described above. - 57 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 57: Rf Synthesizer
VCO is automatically aligned by a binary automatic band selection (BABS) before each synthesizer startup. - 58 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property...
Page 58: Front End Module Control
Figure 27 FEM schematic Figure 27 FEM schematic LG Electronics LGE Property 60/136 - 59 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 60/136...
Page 59: Power Amplifier Module
Table 9 PAM pin description - 60 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property...
Page 60: Pam Schematic
ENABLE SKY77344 MODE PA_BAND PA_MODE C509 C530 C500 C531 Figure 28 PAM schematic - 61 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 62/136...
Page 61: Trouble Shooting
- Connect mobile switch cable between Communication test set and DUT when you need to make a phone call. - Follow trouble shooting procedure LG Electronics LGE Property 63/136 - 62 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 62: Power On Trouble
External Reset JIG Connector VIO_2V62 RTC_2V11 R225 U203 SPOWER_INT PM_INT _RESET PMRSTN C242 NC7WZ08L8X_F113 R203 R202 - 6 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only LG Electronics LGE Property 64/136 Only for training and service purposes...
Page 63 Real Time Clock VAFC VAFC 2.65V Not used VVIB CAM_A_2V8 2.8V 140mA Camera LG Electronics LGE Property 65/136 - 64 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 64 1pin of X500 Change Battery Connector 1. Don’t use Heat Gun 2. Replace main PCB LG Electronics LGE Property 66/136 - 65 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 65: Charging Trouble
BQ25040 _CHG_EOC VSS1 RPWRON_EN VSS2 IFULL EN_SET _CHG_EN C210 C212 C224 (645mA) (105mA) - 66 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 67/136...
Page 66 Battery thermistor Change the Battery value retest is about 10K? Charge is operating properly LG Electronics LGE Property 68/136 - 67 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 67: Lcd Display Trouble
Check signal flow via EMI filter Check the connection LCD FPCB Connector Charge Pump - 68 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 69/136...
Page 68: Only For Training And Service Purposes
Check solder and repair DIF Signal Damaged filter FL400, FL401, FL402 Assemble FL400 FL402 FL401 LG Electronics LGE Property 70/136 - 69 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 69: Camera Trouble
Check the connector combination Check the connector combination LG Electronics LGE Property 71/136 - 70 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 71/136...
Page 70 1. Remove fault CAM connector with heat gun. 2. Clear PAD 3. Change CAM connector - 71 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property...
Page 71: Receiver & Speaker Trouble
SPK_RCV_N BRS-181213SL08-P BLM15BD182SN1D FM_SPK_OUTN RCV_FM_SEL C333 C341 C381 VA305 VA303 2.2u EVLC5S0250 EVLC5S0250 - 72 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 73/136...
Page 72 GS290 Operational Description Revision B Speaker contact C342 C365 C364 C343 Audio Subsystem - 7 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 74/136...
Page 73 Input Signal is Replace Main Board Good(C364,C365 Output Signal is Replace Audio High(C343,C342) AMP(U304) Assemble LG Electronics LGE Property 75/136 - 74 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 74: Microphone Trouble
L303 L303 FB305 FB306 FB305 FB306 MIC101 MIC101 LG Electronics LGE Property 76/136 - 75 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 76/136...
Page 75 MIC Siganl OK? Replace MIC (FB305, FB306) MIC work Replace PCB properly? Assemble - 76 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 77/136...
Page 76: Vibrator Trouble
C331 Check Check PWM Signal PWM Signal C330 C330 - 77 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LG Electronics LGE Property LGE Property 78/136...
Page 77 High? Check U302&Q300 Check PWM replace it Signal (TP3&TP4) Replace Vibrator Assemble - 78 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 79/136...
Page 78: Keypad Back Light Trouble
-Signal path is connected well KEY LED VBAT LD405 LD404 LD403 LD402 LD401 LD400 KEY_BL VA405 EVL5M02200 - 79 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 80/136...
Page 79 Check TP1 is 6,R421,R422 & 2.62V? LD400~LD405 Replace U202 Check PMIC(U202) Replace main board Assemble - 80 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. LG Electronics LGE Property 81/136 Only for training and service purposes...
Page 80: Sim & Usd Trouble
2V9_SIM socket Pin C3 / Pin C7 / SIM_IO SIM_CLK - 81 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 82/136...
Page 81 6 pins are soldered well? Replace Main Board Check Proper SIM Card Assemble - 82 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 83/136...
Page 82 -Card detect is working TP3 TP4 MMC-DETECT PIN MMC_DETECT SIGNAL Card insert Card Deject - 8 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 84/136...
Page 83 TP 1~4 is 2.9V are well soldered Signal) Replace Main Board Check proper uSD? Assemble - 84 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 85/136...
Page 84: Touch Trouble
Resolder U400 check CN400 Solder Resolder or Replace check CN400 CN400 Replacd Main Board LG Electronics LGE Property 86/136 - 85 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 85 Resolder U400 check CN400 Solder Resolder or Replace check CN400 CN400 Replacd Main Board LG Electronics LGE Property 86/136 - 86 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 86: Trouble Shooting Of Receiver Part
Mobile SW & FEM Check point RX I/Q Signal Re-Download S/W & CAL - 87 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 87/136...
Page 87 HOT2 Figure 3. DCXO Cicuit HOT1 GND1 26MHz Waveform Figure 4. DCXO Waveform - 88 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 88/136...
Page 88 RF_EN(TP1) CLK26M RF_CLK RF_DA Figure 6. Transceiver Circuit Figure 7. PLL Control Waveform - 89 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 89/136...
Page 89 Figure 9. Mobile SW & FEM EGSM/GSM850 DCS/PCS Table 2. FEM RX Control Logic - 90 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 90/136...
Page 90 Check Antenna. DCS/PCS RX Figure 10 Mobile SW (R403) Figure 11 FEM Control Signals - 91 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property...
Page 91 TP1(I) TP2(IX) TP3(Q) TP4(QX) U500 Figure 13. RX I/Q Figure 14. RX I/Q Waveform - 92 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 92/136...
Page 92: Trouble Shooting Of Transmitter Part
Figure 1. Main PCB Check FEM & Mobile SW Re-Download S/W & RF CAL - 9 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property...
Page 93 Figure 18. TX I/Q Figure 19. TX I/Q Waveform Figure 19. TX I/Q Waveform - 94 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 94/136...
Page 94 Table 3. Transceiver Output Operation MODE Transceiver Output GMSK Fixed 8PSK Ramp Burst Control - 95 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 95/136...
Page 95 EGSM 30CH EGSM 30CH Figure 23. Transceiver Output (8PSK) Figure 22. Transceiver Output (GMSK) - 96 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 96/136...
Page 96 Control Amp bias HIGH 8PSK HIGH Control Amp bias HIGH - 97 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 97/136 LG Electronics LGE Property...
Page 97 TP1(PA LEVEL) TP2(TXON PA) TP3(PA MODE) TP3(PA MODE) TP1(PA LEVEL) TP2(TXON PA) TP3(PA MODE) - 98 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 98/136...
Page 98 Figure 9. Mobile SW & FEM Table 2. FEM TX Control Logic EGSM/GSM850 DCS/PCS - 99 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property...
Page 99 EGSM TX TP3(VC2) TP4(VC1) Figure 30 Mobile SW (R403) Figure 31 FEM Control Signals - 100 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 100/136...
Page 100: Download & S/W Upgrade
5. DOWNLOAD & S/W UPGRADE 9. Download & S/W upgrade 5. DOWNLOAD & S/W UPGRADE LG Electronics LGE Property 109/142 - 101 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 101 5. DOWNLOAD & S/W UPGRADE GS290 Operational Description Revision B LG Electronics LGE Property 110/142 - 102 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 102 5. DOWNLOAD & S/W UPGRADE GS290 Operational Description Revision B LG Electronics LGE Property 111/142 - 10 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 103 5. DOWNLOAD & S/W UPGRADE GS290 Operational Description Revision B LG Electronics LGE Property 112/142 - 104 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 104 5. DOWNLOAD & S/W UPGRADE GS290 Operational Description Revision B LG Electronics LGE Property 113/142 - 105 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 105 5. DOWNLOAD & S/W UPGRADE GS290 Operational Description Revision B LG Electronics LGE Property 114/142 - 106 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 106 5. DOWNLOAD & S/W UPGRADE GS290 Operational Description Revision B LG Electronics LGE Property 115/142 - 107 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 107 5. DOWNLOAD & S/W UPGRADE GS290 Operational Description Revision B LG Electronics LGE Property 116/142 - 108 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 108 5. DOWNLOAD & S/W UPGRADE GS290 Operational Description Revision B LG Electronics LGE Property 117/142 - 109 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 109 5. DOWNLOAD & S/W UPGRADE GS290 Operational Description Revision B LG Electronics LGE Property 118/142 - 110 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 110 5. DOWNLOAD & S/W UPGRADE GS290 Operational Description Revision B LG Electronics LGE Property 119/142 - 111 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 111: Block Diagram
The functional component arrangement is mentioned below diagram. 6. BLOCK DIAGRAM Figure 1 GS290 Functional block diagram LG Electronics LGE Property 19/136 LGE Internal Use Only - 112 - Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 112: Circuit Diagram
For product inspection TP PMIC CAMERA TDO(DBB Out) AUDIO AMP _RESET TOUCH MUIC RPWRON_EN TP115 UART_RX TP116 UART_TX TP117 Copyright © 2010 LG Electronics. Inc. All right reserved. - 113 - LGE Internal Use Only Only for training and service purposes...
Page 113 IFULL EN_SET _CHG_EN ISET C210 C212 C224 I2C_SCL C206 2.2u C213 GU073-5P-SD-E1500 I2C_SDA USW_INT (645mA) (105mA) VIO_2V62 R218 LGE Internal Use Only - 114 - Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 114 C355 C325 R301 Q300 PIO_3_CLK_REQ_IN VIB_PWM KRC402E PIO_4 BT_HOST_WAKEUP R305 R318 100K 100K C305 100p CLK26M R343 CLK32K Copyright © 2010 LG Electronics. Inc. All right reserved. - 115 - LGE Internal Use Only Only for training and service purposes...
Page 115 Pin3 : MAKER_ID R419 VA413 VA411 Pin11 : IF_MODE(IF1) VA407 VA412 EVLC5S0250 EVLC5S0250 Pin18 : OPEN(OTP) Pin19 : IF_MODE(IF0) LGE Internal Use Only - 116 - Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 116 C517 R508 VRF_1V5 VRF_2V85 X500 TSX-3225 GND2 HOT2 HOT1 GND1 26MHz C511 C518 220n 0.1u CLK26M RF_CLK RF_DA Copyright © 2010 LG Electronics. Inc. All right reserved. - 117 - LGE Internal Use Only Only for training and service purposes...
Page 117 7. CIRCUIT DIAGRAM F_KEY_CAM KB100 CN100 KP_IN[3] KP_OUT[0] KP_OUT[0] KP_IN[3] LGE Internal Use Only - 118 - Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 118 7. CIRCUIT DIAGRAM F_KEY_HOLD KB100 CN100 KP_IN[5] KP_OUT[0] KP_OUT[0] KP_IN[5] Copyright © 2010 LG Electronics. Inc. All right reserved. - 119 - LGE Internal Use Only Only for training and service purposes...
Page 119 7. CIRCUIT DIAGRAM F_KEY_VOL VOL-UP KB100 CN100 KP_IN[3] KP_OUT[2] KP_OUT[2] VOL-DOWN KP_OUT[3] KB101 KP_OUT[3] KP_IN[3] LGE Internal Use Only - 120 - Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 120: Bga Pin Map
Revision B 8. BGA Pin Map 8. BGA Pin Map Revision B U100(PMB8877, EUSY0322801) LG Electronics LGE Property 110/136 - 121 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 121 8. BGA Pin Map GS290 Operational Description Revision B U101(K522H1HACB-B060, EUSY0388101) : Not Use LG Electronics LGE Property 111/136 - 122 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 122 8. BGA Pin Map GS290 Operational Description Revision B Revision B U202(PMB6821, EUSY0323901) LG Electronics LGE Property 112/136 - 12 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 123 GS290 Operational Description 8. BGA Pin Map GS290 Operational Description Revision B U200(MAX14526, EUSY0371201) LG Electronics LGE Property 113/136 - 124 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 124 8. BGA Pin Map GS290 Operational Description Revision B U304(LM49151TLX, EUSY0390501) ** USE ALL PINS LG Electronics LGE Property 114/136 - 125 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 125 U301(BC7820, EUSY0394501) U301(BC7820, EUSY0394501) LG Electronics LGE Property 115/136 LG Electronics LGE Property 115/136 LG Electronics LGE Property 106/142 - 126 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 126 Revision B 8. BGA Pin Map U500(PMB6821, EUSY0323901) LG Electronics LGE Property 116/136 - 127 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only LG Electronics LGE P 107/142 Only for training and service purposes...
Page 127 8. BGA Pin Map GS290 Operational Description Revision B U501(SKY77344, SMPY0017601) LG Electronics LGE Property 117/136 - 128 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Proper 108/142...
Page 128: Pcb Layout
CN400 : Touch Conn. - no Touch sensing MIC300 : Microphone - no far-end voice - no voice recording GS290_MAIN_1.0_PLACE_TOP Copyright © 2010 LG Electronics. Inc. All right reserved. - 129 - LGE Internal Use Only Only for training and service purposes...
Page 129 U500 : Transceiver - no Power On - no Service - no Service - RF Sensitivity & TX Power GS290_MAIN_1.0_PLACE_BOT LGE Internal Use Only - 130 - Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 134: Engineering Mode
4.00 V 0.000 A 10.2. Calibration Step 2.1. Turn on the Phone. 2.2. Execute “HK_34.exe” LG Electronics LGE Property 124/136 - 15 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 135 2.3. Click “SETTING” Menu 2.4. Setup “Ezlooks” menu such as the following figure - 16 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. LG Electronics Only for training and service purposes LGE Property 125/136...
Page 136 1. By-Pass: not control by GPIB CELL: Call Test Equipment 2. Normal: control by GPIB - 17 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property...
Page 137 2.7. Select “MODEL”. 2.8. Click “START” for RF calibration 2.9. RF Calibration finishes. - 18 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. LG Electronics LGE Property Only for training and service purposes 127/136...
Page 138 RX Channel compensation: EGSM->GSM850->DCS->PCS 4. Phone Operation Mode < Normal Mode > < Ptest Mode> - 19 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property...
Page 139: Stand Alone Test
Set COM Port. Check PC Baud rate. Confirm EEPROM & Delta file prefix name. LG Electronics LGE Property 129/136 - 140 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 140 Revision B Click “Update Info” for communicating Phone and Test-Program. Not Connected Connected - 141 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 130/136...
Page 141 Select “Non signaling” in the Quick Bar menu. Then Standalone Test setup is finished. Change “ptest mood” - 142 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property...
Page 142: Tx Test
11.2.Tx Test Click “Non signaling mode” bar and then confirm “OK” text in the command line. - 14 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics...
Page 143 Finally, Click “Write All” bar and try the efficiency test of Phone. 11.3. Rx Test - 144 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property...
Page 144: Rx Test
Select “Rx” in the RF mode menu. Finally, Click “Write All” bar and try the efficiency test of Phone. - 145 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 145 Change the Phone to “normal mode” and then Click the “Reset” bar.\ Change “normal mode “ - 146 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property...
Page 146: Exploded View & Replacement Part List
12. EXPLODED VIEW & REPLACEMENT PART LIST 12.1 EXPLODED VIEW Copyright © 2010 LG Electronics. Inc. All right reserved. - 147 - LGE Internal Use Only Only for training and service purposes...
Page 148: Replacement Parts
COMPLEX, (empty), , , , , COLOR WITHOUT MTAZ01 TAPE MTAZ0266801 COMPLEX, (empty), , , , , COLOR - 149 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 149 COMPLEX, (empty), , , , , A, 1 COLOR WITHOUT MTAB01 TAPE,PROTECTION MTAB0412601 COMPLEX, (empty), , , , , J, 58 COLOR - 150 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 150 PRESS, BeCu, , , , , COLOR WITHOUT SC200 CAN,SHIELD MCBA0059201 PRESS, STS, , , , , COLOR - 151 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 151: Main Component
ECCH0000120 39 pF,50V,J,NP0,TC,1005,R/TP C108 CAP,CERAMIC,CHIP ECCH0000155 10 nF,16V,K,X7R,HD,1005,R/TP C109 CAP,CHIP,MAKER ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP - 152 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 152 ECCH0000155 10 nF,16V,K,X7R,HD,1005,R/TP C140 CAP,CERAMIC,CHIP ECCH0000155 10 nF,16V,K,X7R,HD,1005,R/TP C141 CAP,CHIP,MAKER ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP - 15 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 153 ECCH0005603 2.2 uF,10V ,K ,X5R ,TC ,1608 ,R/TP C227 CAP,CHIP,MAKER ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP - 154 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 154 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP C315 CAP,CERAMIC,CHIP ECCH0000129 120 pF,50V,J,NP0,TC,1005,R/TP C316 CAP,CERAMIC,CHIP ECCH0000155 10 nF,16V,K,X7R,HD,1005,R/TP C317 CAP,CERAMIC,CHIP ECCH0000115 22 pF,50V,J,NP0,TC,1005,R/TP - 155 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 155 ECCH0000198 2.2 uF,6.3V ,M ,X5R ,TC ,1005 ,R/TP C363 CAP,CHIP,MAKER ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP - 156 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 156 ECZH0000841 56 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP C417 CAP,CERAMIC,CHIP ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP - 157 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 157 1 uF,10V ,K ,X5R ,TC ,1005 ,R/TP C531 CAP,CERAMIC,CHIP ECCH0000117 27 pF,50V,J,NP0,TC,1005,R/TP C534 CAP,CERAMIC,CHIP ECCH0000901 2.2 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP - 158 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 158 ENSY0025101 6 ,ETC , ,2.54 mm,6pin, 1.8t, Bridge Type, Stopper L200 INDUCTOR,SMD,POWER ELCP0006703 10 uH,M ,3.2*2.6*1.0 ,R/TP , - 159 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 159 10 Kohm,1/16W ,J ,1005 ,R/TP R105 RES,CHIP,MAKER ERHZ0000267 3300 ohm,1/16W ,F ,1005 ,R/TP R106 RES,CHIP ERHY0000254 4.7K ohm,1/16W,J,1005,R/TP - 160 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 160 1.5 Kohm,1/16W ,J ,1005 ,R/TP R304 INDUCTOR,CHIP ELCH0010402 270 nH,M ,1005 ,R/TP ,CHIP R305 RES,CHIP,MAKER ERHZ0000406 100 Kohm,1/16W ,J ,1005 ,R/TP - 161 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 161 47 Kohm,1/16W ,J ,1005 ,R/TP R410 RES,CHIP,MAKER ERHZ0000486 47 Kohm,1/16W ,J ,1005 ,R/TP R411 RES,CHIP,MAKER ERHZ0000486 47 Kohm,1/16W ,J ,1005 ,R/TP - 162 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 162 USB ,; ,IC,Charger U202 EUSY0323901 BGA PG-WFSGA ,121 PIN,R/TP ,SMPOWER3 SC70 ,5 PIN,R/TP ,Comparator, pin compatible to U300 EUSY0250501 EUSY0077701 - 16 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 163 26 MHz,10 PPM,8 pF,40 ohm,SMD ,32X25X0.6 ,X-Tal X500 X-TAL EXXY0025701 (Infinion chip), Pb-Free ,; , ,10PPM , , , ,SMD ,R/TP - 164 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 164 5.5 V, ,SMD ,Vdc 5.5, Vb 8, Cp 420, 1.0*0.5*0.6 , ,5.5 , VA405 VARISTOR SEVY0003901 ,480 ,1.0*0.5*0.6 ,[empty] ,SMD ,R/TP - 165 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

LG GS290 Service Manual

1 Introduction

2 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 Engineering Mode

11 Stand Alone Test

12 Exploded View & Replacement

Exploded View & Replacement Part List

Quick Links

Troubleshooting

Related Manuals for LG GS290

Summary of Contents for LG GS290

Table of Contents