LG KM380t Service Manual
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LG KM380t Service Manual

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Internal Use Only
Service Manual
KM380t
Date: May, 2008 / Issue 1.0

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Summary of Contents for LG KM380t

  • Page 1 Internal Use Only Service Manual KM380t Date: May, 2008 / Issue 1.0...
  • Page 2 * This manual provides the information necessary to install, program, operate and maintain the KM380t Series. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 3 -...
  • Page 3 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 4 - Only for training and service purposes...

  • Page 4: Table Of Contents

    4.7 Power Amplifier Module ......61 14.2 Replacement Parts ......127 5. PCB layout........62 14.3 Accessory ..........147 5.1 Main PCB component placement ..62 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 5 - Only for training and service purposes...

  • Page 5: Only For Training And Service Purposes

    LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 6 - 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 KM380t Series 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 KM380t Series 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

    Voltage Controlled Oscillator VCTCXO Voltage Control Temperature Compensated 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: 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

    -97dBm ~ -93dBm -100dBm ~ -98dBm Antenna Display -103dBm ~ -101dBm -105dBm ~ -104dBm < -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: 100 ~ 240 V, 50/60Hz Out put: 4.8, 0.9A 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. TECHNICAL BRIEF 3.1 KM380t series Component Block diagram Figure 1. KM380t series Functional Block Diagram Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 19 - Only for training and service purposes...

  • Page 19: Baseband Processor (Bbp) Introduction

    The chip will fully support the FR/HR/EFR/NB-AMR speech codec. S-GOLDRadio™ support multi-slot operation modes CSD/GPRS/EGPRS (up to class 12) without additional external hardware. 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

    - 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 © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 21 -...

  • Page 21: Only For Training And Service Purposes

    Control FEM operation band & mode PAEN PA_EN PAM Enable VRAMP TX_RAMP Tx Ramp signal T_OUT6 PA_MODE_2 Select PAM operation mode (GSM/EDGE) 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 3.2.5 USART Interface KM380t have two UART Drivers as follow : - USART0 : SW upgrade / Calibration - USIF : BT Interface. Table 3. USIF Interface Spec. Resource Name Remark UART0 UART0_TXD UART_TX Transmit Data UART0_RXD...

  • Page 23: Only For Training And Service Purposes

    3. TECHNICAL BRIEF 3.2.7 GPIO map Over a hundred allowable resources, KM380t series is using as follows except dedicated to SIM and Memory. KM380t series GPIO(General Purpose Input/Output) Map, describing application, I/O state, and enable level, is shown in below table.

  • Page 24: Only For Training And Service Purposes

    VSYNC DIF_RESET2 JACK_DET_3.5 Detect plug-in of 3.5pi Ear-Phone I2C_SCL I2C_SCL For Sub-PMIC/Audio DAC/Camera I2C_SDA I2C_SDA For Sub-PMIC/Audio DAC/Camera 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

    RF block temperature measure H/W VERSION S-GOLDRadio H/W version detect VSUPPLY Battery supply voltage measure LOAD Current consumption measure LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 26 - Only for training and service purposes...
  • Page 26 EBU _A[0] ADD(0) EBU _A[1] ADD (1) EBU _A[2] ADD (2) EBU _A[3] ADD (3) EBU _A[4] ADD (4) 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

    _CAS EBU _WAIT_n EBU _SDCLKO SDCLKO EBU _SDCLKI SDCLKI EBU _BFCLKO EBU _BFCLKI EBU _CKE Memory FCDP_RBn FCDP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 28 - Only for training and service purposes...

  • Page 28: 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 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 29 - Only for training and service purposes...

  • Page 29: Power Management Ic

    • Fully controlable by software via I2C - Bus • Temperature and battery voltage sensors • Interrupt channels for peripherals 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 Figure 4. Top level block diagram of the PMU Block of PMB8888 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 31 - Only for training and service purposes...

  • Page 31: Only For Training And Service Purposes

    GSM850_RXN RX1X EBU_AD10 GSM900_RXP EBU_AD11 GSM900_RXN RX2X EBU_AD12 PABIAS EBU_AD13 Figure 6. LDOs Circuit Diagram of KM380t series 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

    3. TECHNICAL BRIEF 3.3.2 Charging KM380t charge the battery using an external charging IC of Intersil ISL9221 for Li-Ion or Li-Polymer battery in 4.2 Volts level. 4.2V~3.69V 3.69V~3.53V 3.53V~3.43V 3.43V~3.3V Figure 7. Battery Block Indication 1 Charging method : CC-CV 2 Charger detect voltage : 4.0 V...

  • Page 33: Power On/Off

    To support Remote power on function for factory mass production, applied an BJT as following figure. As monitoring the RPWRON and Key matrix KP_OUT(2) & KP_IN(6), KM380t series system recognize whether remote power on or End-key pushed LGE Internal Use Only Copyright ©...

  • Page 34: Sim Interface

    3. TECHNICAL BRIEF 3.5 SIM interface KM380t supports 1.8V & 3V plug in SIM, SIM interface scheme is shown in (Figure 10). SIM_IO, SIM_CLK, SIM_RST ports are used to communicate with BBP(S-GOLDRadio) and the SIM powersupply enabled by BBP (_SIM_EN).

  • Page 35: Micro Sd External Memory Interface

    3. TECHNICAL BRIEF 3.6 Micro SD external memory Interface In KM380t series a Micro SD slot for external Memory is connected to MP3 Decoder TCC8720. 2V8_VMM uSD CARD VIO_2V62 DM3AT-SF-PEJ uSD_DET uSD_D1 uSD_D0 uSD_CLK uSD_CMD uSD_D3 uSD_D2 C245 C246 C247 1000 pF Figure 10.

  • Page 36: Memory

    3. TECHNICAL BRIEF 3.7 Memory 1Gbit NAND Flash & 512Mbit SDRAM employed on KM380t series with 8 bit bus for NAND and 16bit bus for SDRAM thru ADD(0) ~ ADD(24). The 1Gbit NAND Flash memory with SDRAM stacked device family offers multiple high-performance solutions.

  • Page 37: Lcd Display

    LCD Write Enable DIF_RD LCD Read Enable Ground Ground Ground Ground Ground Ground Ground Ground Ground Ground DIF_D(0) LCD Data LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 38 - Only for training and service purposes...

  • Page 38: Only For Training And Service Purposes

    Interface Mode 2 LCD_ID LCD Module Maker ID VIO_2V62 LCD IO VCC Ground VIO_2V62 LCD VCC VIO_2V62 LCD VCC Ground Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 39 - Only for training and service purposes...

  • Page 39: Keypad Switching & Scanning

    R592 100K 100nH PWRON PRSB6.8C R434 RPWRON KP_OUT(2) 3.3M C410 Q400 EMX18 END_KEY_IN Figure 12. Keypad Configuration Circuit LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 40 - Only for training and service purposes...

  • Page 40: Keypad Back-Light Illumination

    GOLDradio Flash LED circuit is shown in below Figure13. VBAT KEY LED R593 KEY_BL_EN 100K Figure 13. Keypad Backlight Circuit Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 41 - Only for training and service purposes...

  • Page 41: Lcd Back Light Illumination

    MLED_C2 LED3 MLED_C3 LED4 MLED_C4 CPWM LED5 MLED_C5 LCD_BACKLIGHT_EN P_GND C414 C416 0.1u C417 Figure 14. Charge-Pump Circuit LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 42 - Only for training and service purposes...

  • Page 42: Isp(Image Signal Processor)

    3. TECHNICAL BRIEF 3.12 ISP(Image Signal Processor) KM380t Series support Camera resolution up to 1.3M pixel. Camera Sensor I/F is integrated in the S-GOLDradio(PMB8888). 2V8_CAM_DVDD 2V8_CAM_AVDD VBT_2V9 1V8_CAM VBAT FB300 U300 RT9011-MGPQW VOUT1 VOUT2 C308 C309 C307 TP300 R315 100ohm...

  • Page 43: Battery Current Consumption Monitor

    3. TECHNICAL BRIEF 3.13 Battery current consumption monitor KM380t series use a current monitoring function to calculate the battery capacity and the remaining time, as monitoring current flow from the battery thru 47mohm resistor. Battery Connector & Current Monitor VSUPPLY...

  • Page 44: Jtag & Etm Interface Connector

    3. TECHNICAL BRIEF 3.14 JTAG & ETM interface connector In case of KM380t series mass production, the JTAG interface connector will not be mount on board. That is only for developing and software debugging purpose. ON BOARD ARM9 JTAG VSD2_1V8...

  • Page 45: Audio

    3. TECHNICAL BRIEF 3.15 Audio KM380t series Audio signal flow diagram as following diagram. Figure 18. Audio Signal Flow Diagram LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 46 - Only for training and service purposes...

  • Page 46: Only For Training And Service Purposes

    SPKN CSB_ADDR SPK_AMPN I2C_SCL SCLK C226 C227 I2C_SDA SDIN R214 MODE 100K Figure 19. Audio DAC Circuit Diagram Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 47 - Only for training and service purposes...

  • Page 47: Only For Training And Service Purposes

    C401 MIC400 MIC_P L402 100nH C402 MIC_N C404 C403 C405 C406 SPM0204LE5-QB 100p Figure 20. Microphone Circuit Diagram LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 48 - Only for training and service purposes...

  • Page 48: Charging Circuit

    CHG_EN IMIN IUSB R319 C332 C333 C334 0.1uF 0.1u 0.1u (1%) R596 (1%) Figure 22. Charging Circuit Diagram Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 49 - Only for training and service purposes...

  • Page 49: Bluetooth

    BT_VCXO_EN C526 C527 C528 BT_RESET C529 2.2u 0.1u 2.2u VIO_2V62 Figure 23. Bluetooth / FM Radio Circuit Diagram 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

    - I2C slave for FM - Two audio PCM interfaces (input and output) - Analogue stereo (output only) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 51 - Only for training and service purposes...

  • Page 51: Fm Radio

    • Control of FM via Bluetooth HCI or I2C • Adaptive filter to suppress narrow band interference in the FM channel LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 52 - Only for training and service purposes...

  • Page 52: 18Pin Multi Media Interface Connector

    Charger voltage VCHG Charger voltage Not used VBUS_USB USB VBUS UART_Tx UART Tx UART_Rx UART Rx Power GND Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 53 - Only for training and service purposes...

  • Page 53: Only For Training And Service Purposes

    ICVS0505500FR C321 24p VA408 HSO_R VA305 C326 L303 100nH VA306 Figure 28. 18 Pin Multi port Circuit Diagram LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 54 - Only for training and service purposes...

  • Page 54: Rf Circuit Technical Brief

    GSM and EDGE with integrated PGA functionality. Figure 29. PMB 6272 Function Block Diagram Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 55 - Only for training and service purposes...

  • Page 55: Only For Training And Service Purposes

    HOT2 3 GND2 1 HOT1 GND1 NX3225SA SIM_IO CC_IO SIM_CLK CC_CLK SIM_RST CC_RST Figure 30. SMARTi-PM Circuit Diagram LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 56 - Only for training and service purposes...

  • Page 56: 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 © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 57 -...

  • Page 57: 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. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 58 - Only for training and service purposes...

  • Page 58: Rf Synthesizer

    To cover the wide frequency range the VCO is automatically aligned by a binary automatic band selection (BABS) before each synthesizer startup. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 59 -...

  • Page 59: Dcxo

    3.9nH L505 L504 L503 L506 12nH 4.7nH 12nH 4.7nH GSM900 GSM850 DCS1800 PCS1900 Figure 33. FEM Circuit Diagram LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 60 - Only for training and service purposes...

  • Page 60: Power Amplifier Module

    C562 C563 C564 C565 C566 C572 C567 C568 C560 0.1u 33 uF Figure 34. Power Amplifier Circuit Diagram Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 61 - Only for training and service purposes...

  • Page 61: Pcb Layout

    5. PCB layout 5. PCB layout 5.1 Main PCB component placement Main PCB Top Main PCB Top placement LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 62 - Only for training and service purposes...

  • Page 62: Only For Training And Service Purposes

    5. PCB layout Main PCB bottom Main PCB bottom placement 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

    Remote Power On VRTC_2V0 END_KEY_IN RPWRON_EN KP_IN(6) R431 330K R435 PWRON R434 RPWRON KP_OUT(2) 3.3M C410 Q400 EMX18 END_KEY_IN Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 65 - Only for training and service purposes...
  • Page 65 Is the 26MHz clock from TP4 4 Check solder X100 X100 of U102 ? Replace X-TAL Replace main PCB LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 66 - Only for training and service purposes...
  • Page 66 6. Trouble shooting Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 67 - Only for training and service purposes...

  • Page 67: Charging Trouble

    IMIN ICVS0505500FR IUSB VA304 VA407 R319 C332 C333 C334 0.1uF 0.1u 0.1u C319 (1%) R596 (1%) ICVS0505500FR VA408 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 68 - Only for training and service purposes...
  • Page 68 U303 or replace it charging until Battery voltage battery Voltage goes up to is over 3.35V? 3.35V Charge is operating properly Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 69 - Only for training and service purposes...

  • Page 69: Lcd Display Trouble

    MODE1 MODE2 DIF_D(0) INOUT_A4 INOUT_B4 8 BIT ICVE10184E150R101FR FL402 C407 16 BIT AXT540124 9 BIT R430 LCD_RESET C409 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 70 - Only for training and service purposes...
  • Page 70 Is LCD FPCB normal? Check solder and Signal is normal on repair 2.62V Signal Damaged filter FL400, FL401,FL402 Assemble Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 71 - Only for training and service purposes...

  • Page 71: Camera Trouble

    CAM_D(7) MCLK CAM_CLK C322 C325 C323 C324 2V8_CAM_DVDD 0.1u 2V8_CAM_AVDD FB306 1V8_CAM C327 C328 C329 0.1u 0.1u 0.1u LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 72 - Only for training and service purposes...
  • Page 72 Combination then 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 Trouble

    RIN1 C225 SPK_P RIN2 SPKP SPK_AMPP SPKN CSB_ADDR SPK_AMPN I2C_SCL SCLK C226 C227 I2C_SDA SDIN R214 MODE 100K LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 74 - Only for training and service purposes...
  • Page 74 -board Receiver Signal (TP5, TP6) Replace Receiver High(1.6V)? TP5 TP P 6 Replace Main PCB Assemble Receiver Signal Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 75 - Only for training and service purposes...

  • Page 75: Microphone Trouble

    L400) MIC Signal Replace Check the signal microphone level at (TP2)each (MIC400) side of MIC400. Replace Main PCB LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 76 - Only for training and service purposes...

  • Page 76: Ear-Mic Jack Detection Trouble

    FB302 The main board has a problem Replace Main PCB Assemble CN301 TP1 TP FB301 FB302 Ear-Jack Signal Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 77 - Only for training and service purposes...

  • Page 77: Vibrator Trouble

    Check Vibrator Connector Combination Resoldering or Check the voltage of CN303 (TP1) Replace U102 Voltage is 2.8? Replace Vibrator Assemble LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 78 - Only for training and service purposes...

  • Page 78: Keypad Back Light Trouble

    Check VBAT Check BATTERY check GPIO Replace TR(Q402) signal(KEY_BL_EN, TP1) Voltage of Q402 > 0.7v KEY_LED is operating Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 79 - Only for training and service purposes...

  • Page 79: Sim & Usd Trouble

    R325 GND3 GND2 GND4 GND1 SIM_IO SIM_CLK SIM_RST C346 C347 C348 0.1u 150p TP3 (#6) TP1(#3) SIM_IO SIM_CLK LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 80 - Only for training and service purposes...
  • Page 80 TP1(D0 uSD_CLK uSD_CMD uSD_D3 uSD_D2 TP2(D1 C245 C246 C247 1000 pF Card insert Card eject Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 81 - Only for training and service purposes...
  • Page 81 TF socket pins uSD D0~D3 is 2.9V are well soldered Signal) Check proper Replace Main Board uSD? Assemble LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 82 - Only for training and service purposes...

  • Page 82: Rf Troubleshooting

    Check DCXO Circuit Check RF Switch Circuit General function is OK. Fig 1 Troubleshooting flowchart of general circuits Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 83 - Only for training and service purposes...
  • Page 83 - check LDO output voltage of U102 → I.e. VRF1_2V85 (C122), C117 VRF2_1V5 (C115), C122 VRF3_2V85 (C117) C115 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 84 - Only for training and service purposes...
  • Page 84 Fig 5 DCXO circuit (X100) √ The output voltage of X100 is 890mV p-p. Fig 6 Waveform of DCXO Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 85 - Only for training and service purposes...
  • Page 85 L514 L515 L516 L517 6.8p 6.8p 4.7p 4.7p 4.7nH 4.7nH 3.9nH 3.9nH Fig 8 RF S/W circuit (U502) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 86 - Only for training and service purposes...

  • Page 86: Rf Receiver Path Troubleshooting

    General Circuits Troubleshooting Check FEM Circuit After download S/W, Calibrate it. Fig 9 Troubleshooting flowchart of RF Receiver path Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 87 - Only for training and service purposes...
  • Page 87 R509 C522 Control Signal of FEM R509 R590 C523 R590 U502 LSHS-C085FB U502 Fig 11 FEM circuit (U502) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 88 - Only for training and service purposes...
  • Page 88 √ When GSM band called, it must seem as below. (yellow is VC1, blue is VC2) √ When D/PCS band called, it must seem as below. (yellow is VC1, blue is VC2) Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only...

  • Page 89: Rf Transmitter Path Troubleshooting

    Check Replace Control signal of After download S/W, Calibrate it. Fig 12 Troubleshooting flowchart of RF Transmitter path LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 90 - Only for training and service purposes...
  • Page 90 C560 0.1u 33 uF √ Check point of PAM - Transmitter output power (=C548, C543) is approximately 2dBm. Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 91 - Only for training and service purposes...

  • Page 91: Pam Circuit

    Check the next part Fig 14 Debugging flowchart of PAM circuit √ When EGSM band called, it must seem as below. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 92 - Only for training and service purposes...
  • Page 92 PA EN TX_RAMP PA_BAND PA_MODE2 √ When D/PCS band called, it must seem as below. TX_RAMP PA_MODE2 PA_BAND Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 93 - Only for training and service purposes...
  • Page 93 C561 C562 C563 C564 C565 C566 C572 C567 C568 C560 0.1u 33 uF Fig 15 PAM circuit (U501) LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 94 - Only for training and service purposes...

  • Page 94: Download & S/W Upgrade

    1.After “GSMULTI” folder copy, paste C:\ Reg file Multi- Download start file 2. “MultiGSM.exe” execution file execute KM380 KM380 Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 95 - Only for training and service purposes...

  • Page 95: Multi-Download Program Setting

    ■ Start COM:1, End COM:16 Default condition ■ Frame:16 ■ Setting Completed KM380 KM380 " START " BTN Click LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 96 - Only for training and service purposes...
  • Page 96 7. Download & S/W upgrade Stand-by Condition: “Wait phone connecting” confirm → → Phone connection ■ Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 97 - Only for training and service purposes...
  • Page 97 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 98 - Only for training and service purposes...

  • Page 98: Circuit Diagram

    UT100 VIO_2V62 2.5G UART_RX UART_TX VCHAR RPWON ON_SW ON_SW RPWRON_EN VBAT VSUPPLY VBAT VBAT URXD UTXD I2C_SDA I2C_SCL Copyright © 2008 LG Electronics. Inc. All right reserved. - 99 - LGE Internal Use Only Only for training and service purposes...
  • Page 99 R230 DM3AT-SF-PEJ C243 C244 uSD_DET 470n 470n uSD_D1 uSD_D0 uSD_CLK uSD_CMD uSD_D3 uSD_D2 C245 C246 C247 1000 pF LGE Internal Use Only - 100 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 100 VB300 U304 EVLC18S02015 EVLC18S02015 SUY98005LT1G R327 VIB_CTRL R328 L316 VOUT C593 R329 100nH CN303 C352 2.2u 100K 0.1u Copyright © 2008 LG Electronics. Inc. All right reserved. - 101 - LGE Internal Use Only Only for training and service purposes...
  • Page 101 LED3 MLED_C3 0.1u BU52031NVX U400 LED4 MLED_C4 C413 CPWM LED5 MLED_C5 0.1u LCD_BACKLIGHT_EN P_GND C414 C416 0.1u C417 LGE Internal Use Only - 102 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 102 C564 C565 C566 C572 C567 C568 C560 0.1u 33 uF 12nH 4.7nH 12nH 4.7nH GSM900 GSM850 DCS1800 PCS1900 Copyright © 2008 LG Electronics. Inc. All right reserved. - 103 - LGE Internal Use Only Only for training and service purposes...
  • Page 103 LGE Internal Use Only - 104 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 104: Bgm Pin Map

    9. BGM Pin Map 9. BGM Pin Map BGA IC Pin Check (U102, PMB8888) : Not in use Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 105 - Only for training and service purposes...
  • Page 105 9. BGM Pin Map BGA IC Pin Check (U100, K5D1G12ACE-D075) : Not in use LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 106 - Only for training and service purposes...
  • Page 106 9. BGM Pin Map BGA IC Pin Check (U201, WM8959) : Not in use Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 107 - Only for training and service purposes...
  • Page 107 9. BGM Pin Map BGA IC Pin Check (U202, TCC8720) : Not in use LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 108 - Only for training and service purposes...
  • Page 108 9. BGM Pin Map BGA IC Pin Check (U500, BC5FM) : Not in use Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 109 - Only for training and service purposes...
  • Page 109 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 110 - Only for training and service purposes...

  • Page 110: Pcb Layout

    10. PCB LAYOUT Copyright © 2008 LG Electronics. Inc. All right reserved. - 111 - LGE Internal Use Only Only for training and service purposes...
  • Page 111 No sending voice No Charging J301 SIM Socket U400 Hall effect IC No SIM detection No Flip On/Off detection LGE Internal Use Only - 112 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 112: Rf Calibration

    11.1 Test Equipment Setup 4.00 V 0.000 A 11.2 Calibration Step 11.2.1 Turn on the Phone 11.2.2 Execute “HK_27.exe” Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 113 - Only for training and service purposes...
  • Page 113 11. RF Calibration 11.2.3 Click “SETTING” Menu 11.2.4 Setup “Ezlooks” menu such as the following figure LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 114 - Only for training and service purposes...
  • Page 114 1. By-Pa ss: not con trol by GPIB 2. Normal : control by GPIB Setup UART Port PWR : Power Supply CELL :Call- Test Equipment Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 115 - Only for training and service purposes...
  • Page 115 11. RF Calibration 11.2.7 Select “MODEL” 11.2.8 Click “START” for RF calibration 11.2.9 RF Calibration finishes. LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 116 - Only for training and service purposes...
  • Page 116 11.2.10 Calibration data will be saved to the following folder Savi ng f ormat: year /m ont h/ day_PASS Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 117 - Only for training and service purposes...
  • Page 117 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. - 118 - Only for training and service purposes...

  • Page 118: Stand-Alone Test

    3 Confirm EEPROM & Delta file prefix name. ① ② ③ 4 Click “Update Info” for communicating Phone and Test-Program. Not Connected ④ Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 119 - Only for training and service purposes...
  • Page 119 6 Select “Non signaling” in the Quick Bar menu. Then Standalone Test setup is finished. ⑥ ⑤ Change “ ptest mood ” LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 120 - Only for training and service purposes...

  • Page 120: 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. ④ ② ③ Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 121 - Only for training and service purposes...

  • Page 121: Rx Test

    5 Change the Phone to “normal mode” and then Click the “Reset” bar. ⑤ ④ Change " normal mode " LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 122 - Only for training and service purposes...

  • Page 122: Engineering Mode

    [6-9-1] FM Radio Test [3-6] MemGenConf [3-7] MemAllUse [6-10] Touchpad Test [3-8] MemDetUse [3-9] MemDump [3-10] Change Frequency Band Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 123 - Only for training and service purposes...
  • Page 123 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 124 - Only for training and service purposes...

  • Page 124: Exploded View & Replacement Part List

    14. EXPLODED VIEW & REPLACEMENT PART LIST 14.1 EXPLODED VIEW 36 39 Copyright © 2008 LG Electronics. Inc. All right reserved. - 125 - LGE Internal Use Only Only for training and service purposes...
  • Page 125 ASS'Y EXPLODED VIEW LGE Internal Use Only - 126 - Copyright © 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 126: Replacement Parts

    MOLD, PC LUPOY SC-1004ML, , , , , Color MDAG00 DECO,FRONT MDAG0034901 MOLD, POM TX-31, , , , , DARK BLUE Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 127 - Only for training and service purposes...
  • Page 127 COMPLEX, (empty), , , , , Color MWAE WINDOW,CAMERA MWAE0033001 CUTTING, PMMA MR 200, , , , , Black LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 128 - Only for training and service purposes...
  • Page 128 COMPLEX, (empty), , , , , Color Without ADCA00 DOME ASSY,METAL ADCA0079301 Color Without MLAZ00 LABEL MLAZ0038301 PID Label 4 Array Color Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 129 - Only for training and service purposes...

  • Page 129: Main Component

    ECCH0009216 22 pF,25V ,J ,X7R ,TC ,0603 ,R/TP C109 CAP,CERAMIC,CHIP ECCH0009103 100 pF,50V ,J ,X7R ,TC ,0603 ,R/TP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 130 - Only for training and service purposes...
  • Page 130 ECCH0000113 18 pF,50V,J,NP0,TC,1005,R/TP C140 CAP,CERAMIC,CHIP ECCH0000113 18 pF,50V,J,NP0,TC,1005,R/TP C141 CAP,CHIP,MAKER ECZH0001216 220 nF,10V ,K ,X5R ,TC ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 131 - Only for training and service purposes...
  • Page 131 ECZH0001215 1 uF,10V ,K ,X5R ,TC ,1005 ,R/TP C231 CAP,CHIP,MAKER ECZH0001215 1 uF,10V ,K ,X5R ,TC ,1005 ,R/TP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 132 - Only for training and service purposes...
  • Page 132 ECZH0000813 100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP C316 CAP,CHIP,MAKER ECZH0000901 24 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 133 - Only for training and service purposes...
  • Page 133 ECCH0000117 27 pF,50V,J,NP0,TC,1005,R/TP C404 CAP,CERAMIC,CHIP ECCH0000117 27 pF,50V,J,NP0,TC,1005,R/TP C405 CAP,CHIP,MAKER ECZH0000813 100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 134 - Only for training and service purposes...
  • Page 134 ECCH0000112 15 pF,50V,J,NP0,TC,1005,R/TP C521 CAP,CERAMIC,CHIP ECCH0000112 15 pF,50V,J,NP0,TC,1005,R/TP C522 CAP,CERAMIC,CHIP ECCH0000122 47 pF,50V,J,NP0,TC,1005,R/TP C523 CAP,CERAMIC,CHIP ECCH0000122 47 pF,50V,J,NP0,TC,1005,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 135 - Only for training and service purposes...
  • Page 135 ECZH0000813 100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP C592 CAP,CERAMIC,CHIP ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 136 - Only for training and service purposes...
  • Page 136 47 nH,J ,1005 ,R/TP , L101 INDUCTOR,CHIP ELCH0004722 47 nH,J ,1005 ,R/TP , L102 INDUCTOR,CHIP ELCH0004722 47 nH,J ,1005 ,R/TP , Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 137 - Only for training and service purposes...
  • Page 137 100 nH,J ,1005 ,R/TP , L509 INDUCTOR,CHIP ELCH0005009 100 nH,J ,1005 ,R/TP , L510 INDUCTOR,CHIP ELCH0005009 100 nH,J ,1005 ,R/TP , LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 138 - Only for training and service purposes...
  • Page 138 100 Kohm,1/20W(0.05W) ,J ,0603 ,R/TP R126 RES,CHIP,MAKER ERHZ0000443 2200 ohm,1/16W ,J ,1005 ,R/TP R127 RES,CHIP,MAKER ERHZ0000443 2200 ohm,1/16W ,J ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 139 - Only for training and service purposes...
  • Page 139 47 Kohm,1/20W(0.05W) ,J ,0603 ,R/TP R236 RES,CHIP ERHY0009561 56 Kohm,1/20W(0.05W) ,F ,0603 ,R/TP R237 RES,CHIP ERHY0009561 56 Kohm,1/20W(0.05W) ,F ,0603 ,R/TP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 140 - Only for training and service purposes...
  • Page 140 150 ohm,1/16W ,J ,1005 ,R/TP R420 RES,CHIP,MAKER ERHZ0000420 150 ohm,1/16W ,J ,1005 ,R/TP R421 RES,CHIP,MAKER ERHZ0000420 150 ohm,1/16W ,J ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 141 - Only for training and service purposes...
  • Page 141 47 ohm,1/16W ,J ,1005 ,R/TP R522 RES,CHIP,MAKER ERHZ0000483 47 ohm,1/16W ,J ,1005 ,R/TP R523 RES,CHIP,MAKER ERHZ0000483 47 ohm,1/16W ,J ,1005 ,R/TP LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 142 - Only for training and service purposes...
  • Page 142 SOT23-5 ,5 PIN,R/TP ,2.5V Sense voltage(max), current U301 EUSY0286901 monitor U302 CONN,SOCKET ENSY0020101 24 PIN,ETC , ,0.9 mm, Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 143 - Only for training and service purposes...
  • Page 143 -30'C ~ +85'C, C0 1.0pF, C1 3.6fF ,; ,26 ,10PPM ,8 , , ,SMD ,R/TP 32.768 KHz,20 PPM,12.5 pF,70 Kohm,SMD ,3.2*1.5*0.9 X101 X-TAL EXXY0018701 LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 144 - Only for training and service purposes...
  • Page 144 200 ohm,1/6W ,J ,1005 ,R/TP R411 RES,CHIP,MAKER ERHZ0000527 200 ohm,1/6W ,J ,1005 ,R/TP R412 RES,CHIP ERHY0003301 100 ohm,1/16W ,J ,1005 ,R/TP Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 145 - Only for training and service purposes...
  • Page 145 SEVY0005402 5.6 V, ,SMD ,1005 Siez , 50pF VA301 VARISTOR SEVY0005402 5.6 V, ,SMD ,1005 Siez , 50pF LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved. - 146 - Only for training and service purposes...

  • Page 146: 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 , Copyright © 2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 147 - Only for training and service purposes...
  • Page 147 Note...
  • Page 148 Note...

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