LG -A290 Service Manual
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LG -A290 Service Manual

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Internal Use Only
Service Manual
LG-A290
Date: January, 2012 / Issue 1.0

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Summary of Contents for LG LG-A290

  • Page 1 Internal Use Only Service Manual LG-A290 Date: January, 2012 / Issue 1.0...

  • Page 2: Table Of Contents

    4.8 Camera Trouble ................79 4.9 Speaker/ Receiver Trouble ............83 4.10 3.5φ Headset Trouble ..............85 4.11 Microphone Trouble ..............88 LGE Internal Use Only -  - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 3: Introduction

    Therefore, note that unauthorized alternations or repair may affect the regulatory status of the system and may void any remaining warranty. LGE Internal Use Only - 3 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 4 • When returning system boards or parts like EEPROM to the factory, use the protective package as described. LGE Internal Use Only - 4 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 5: Abbreviations

    Intermediate Frequency Liquid Crystal Display Low Drop Output Light Emitting Diode OPLL Offset Phase Locked Loop Power Amplifier Module LGE Internal Use Only - 5 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 6 Time Division Multiple Access UART Universal Asynchronous Receiver/Transmitter Voltage Controlled Oscillator VCTCXO Voltage Control Temperature Compensated Crystal Oscillator Wireless Application Protocol LGE Internal Use Only - 6 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 7: System Specification

    Internal EAR Phone Jack Yes(3.5Ø) PC Synchronization Speech coding EFR/FR/HR Data and Fax Vibrator Loud Speaker Voice Recoding LGE Internal Use Only - 7 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 8 Travel Adapter MIDI SW MIDI (Mono SPK) Camera 1.3M Bluetooth / FM Radio Bluetooth version .1 / 76~108MHz supported LGE Internal Use Only - 8 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 9: Technical Specification

    0 dBm ±3dB 4 dBm ±4dB 18 dBm ±3dB  dBm ±5dB 16 dBm ±3dB 0 dBm ±5dB LGE Internal Use Only - 9 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 10 GSM850 / EGSM Offset from Carrier (kHz). Max. dBm Output RF Spectrum (due to switching transient) 1,00 1,800 LGE Internal Use Only - 10 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 11 ± 3 dB 15±3 dB Frequency (Hz) Max.(dB) Min.(dB) Sending Response 1,000 ,000 3,000 3,400 4,000 RLR(Norminal) 4± 3 dB LGE Internal Use Only - 11 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 12 Fast Charge : Typ. 600 mA Charge Current Slow Charge : Typ. 500mA Total Charging Time : < Approx. 3 hours 30min. LGE Internal Use Only - 1 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 13 Capacity: 1500mAh Switching-mode charger Travel Charger Input: 90 ~ 64 V, 47/63 Hz Output: 5.1 V, 700 mA LGE Internal Use Only - 13 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 14: Technical Brief

    3. TECHNICAL BRIEF 3. TECHNICAL BRIEF 3.1 Digital Main Processor Figure. 3.1.1 MT6253 Hardware Block Diagram LGE Internal Use Only - 14 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 15: External Memory Interface

    • Alerter Output with Enhanced PWM or PDM. • Maximum 7 external interrupt lines. 3.1.5 Security • Support security key and 18bit chip unique ID. LGE Internal Use Only - 15 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 16 • Fully integrated channel filter with f3dB=150kHs. • 95dB gain with 60dB gain control range. • No IIP calibration. LGE Internal Use Only - 16 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 17 • GSM channel coding, equalization and A5/1, A5/ and A5/3 ciphering. • GPRS GEA1, GEA and GEA3 ciphering. LGE Internal Use Only - 17 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 18 • Analog multiplexer for Stereo Audio. • FM Radio Recording. • Stereo to Mono Conversion. • HE-AAC decode support. LGE Internal Use Only - 18 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 19: Power Management

    The RF LDO is a linear regulator that could source 180mA (max) with .8V output voltage. It supplies the RF circuitry of the handset. The LDO is optimized for high performance and adequate quiescent current. LGE Internal Use Only - 19 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 20 (SIM) card. It supplies the SIM card and SIM level shifter circuitry in the handset. The Vsim LDO is controlled independently by the register named VSIM_EN. LGE Internal Use Only - 0 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 21 VCAMD_SEL[1:0]. It supplies the digital power of the camera module. Vcamd is controlled independently by the register named RG_VCAMD_EN. LGE Internal Use Only - 1 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 22 1V5 / 1V8 / V5 / V8 75 mA CAMERA (DIGITAL) VRTC 1 mA Table3.2.1. Power Supply Domains (Without RF) LGE Internal Use Only -  - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 23 Phone Power State Core Operating Mode Figure 3.2.1. Major Phone Power States and Operating Modes for MT6253 based terminal LGE Internal Use Only - 3 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 24: Fem With Integrated Power Amplifier Module

    Bi-FET PAC and switch control circuit are fabricated onto a single Gallium Arsenide (GaAs) die. One PA block supports the GSM850/900 bands and the other PA block supports the DCS1800/PCS1900 bands. LGE Internal Use Only - 4 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 25 L402 9.1n L403 O2_2 C420 EGSM_RxN C421 5.6p LGE Internal Use Only - 5 - Copyright © 01 LG Electronics. Inc. All right reserved. DCS_RxN Only for training and service purposes B9513 FL401 L404 1 IN 4.7n O1_1 C422 5.6p...

  • Page 26: Clocks

    FREF BT_CLK_26M C109 4.7u AU_VCM TSX-3225 26MHZ_7_4PF 26MHz XTAL1 XTAL2_GND X100 AVDD_RTC Figure. 3.4.2 Crystal Oscillator External Connection LGE Internal Use Only - 6 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 27 However the penalty is losing a little system efficiency for switching on and off bus clock, but the impact is small LGE Internal Use Only - 7 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 28: Rfsys Of Mt653 (U101)

    - Fully integrated channel filter with f =150kHz - 95 dB gain with 60 dB gain control range LGE Internal Use Only - 8 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 29 - On-chip programmable capacitor array for coarse tune. - On-chip programmable capacitor array for fine tune. RFSYS in a-QFN package  LGE Internal Use Only - 9 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 30: Memory(Pf38F5060M0Y3Dk, U100 )

    4. For full AD-Mux (NOR/PSRAM) all address/data are shared with NOR ADQ[15:0], Upper addresses [Max:16] should be connected to VSS. Figure. 3.6.1 MEMORY BLOCK DIAGRAM LGE Internal Use Only - 30 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 31 • Deep Power-Down (DPD) mode: DPD provides the lowest power consumption and is enabled by programming in the Enhanced Configuration Register. DPD is initiated by asserting the DPD pin. LGE Internal Use Only - 31 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 32 - Buffered Enhanced Factory and 1.8 V Low-Power Buffer Programming Modes: μs/Byte (Typ). - Deep Power-Down Mode:  μA (Typ). - Configurable Output Driver. LGE Internal Use Only - 3 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 33  - Numonyx™ FDI and Numonyx™ PSM. - Common Flash Interface. - Basic and Extended Flash Command Set. LGE Internal Use Only - 33 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 34: Bt & Fm Module(Mt666, U401)

    It also supports 10dBm transmit power with efficient power control, which provide the user with excellent link quality. LGE Internal Use Only - 34 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 35 -dBuVemf sensitivity with superior interference rejection. -0dBuVemf RDS sensitivity (dev: KHz). -Support IS digital interface (available in WLCSP package). LGE Internal Use Only - 35 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 36: Functional Description

    - Bluetooth standalone operation mode. - FM standalone operation mode. - Bluetooth + FM concurrent operations mode. - System deep sleep mode. LGE Internal Use Only - 36 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 37 The FM subsystem supports high performance stereo analog line out. In WLCSP package, it also supports digital audio out. LGE Internal Use Only - 37 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 38: Sim Card Interface

    SIM_RST_2 SIM_DATA_2 SIM_CLK_2 GND4 GND1 GND3 GND2 VA218 VA219 VA220 C254 C256 Figure 3.8.1 SIM Connector Circuit Diagram LGE Internal Use Only - 38 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 39 A90 is using U0 as SIM controller to be able to use triple SIM. Figure 3.8.2 SIM Interface block diagram LGE Internal Use Only - 39 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 40 SIM CARD C SRST1 SIO1 VSIM2 SCLK2 SRST2 SIM CARD D SYSRSTB SIO2 MT6306 Figure 3.8.3 SIM Controller block diagram LGE Internal Use Only - 40 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 41: Micro-Sd Card Interface

    SDIO card specification version 1.0 partially. However, the controller can only be configured as either the host controller. LGE Internal Use Only - 41 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 42 [ microSD CARD PIN_MAP ] microSD CARD PIN NUMBER DESCRIPTION DAT CD/DAT3 T5 T7 T2 T4 T6 T8 DAT0 DAT1 LGE Internal Use Only - 4 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 43 HOST 10-90 K DATA3 OUT 470 Kohm CD/DAT3 IN RCDEN Figure 3.9.2 Card Detection for SD/MMC Memory Card LGE Internal Use Only - 43 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 44: Lcd Interface

    These features make the ILI95 an ideal LCD driver for medium or small size portable products such as digital cellular phones or small PDA, where long battery life is a major concern. LGE Internal Use Only - 44 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 45: Default Setting

    010 : 10mA 011 : 15mA 100 : 0mA 101 : 5mA 110 : 30mA 111 : 30mA LGE Internal Use Only - 45 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 46: Battery Charger Interface / Muic

    If charger off timer is disabled, charger stays at CV mode until stopped by system control. LGE Internal Use Only - 46 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 47 OUT2 LDO2 LED3 OUT3 I control LDO3 LED4 I control LDO4 OUT4 Figure 3.11.2 MINI ABB BLOCK DIAGRAM LGE Internal Use Only - 47 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 48: Keypad Interface

    VA308 VA309 VA310 VA311 KEY_ROW4 VA314 SW300 KB307 END_KEY HOT_KEY VA303 KEY_COL4 VA315 Figure 3.12.1 MAIN KEY STRUCTURE LGE Internal Use Only - 48 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 49 ROW4 ROW3 ROW2 ROW1 ROW0 Baseband PMIC PMIC integrated BB chip Figure 3.12.2 6x7 matrix with one power-key LGE Internal Use Only - 49 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 50 Figure 3.12.3 One key pressed with de-bounce mechanism denoted Figure 3.12.4 Two keys pressed, case 1 (b) Two keys pressed, case 2 LGE Internal Use Only - 50 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 51: Audio Front-End

    The digital filter block performs filter operations for voice band and audio band signal processing. The Digital Audio Interface (DAI) block communicates with the System Simulator for FTA or external Bluetooth modules. LGE Internal Use Only - 51 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 52 Figure 3.13.3 shows the timing diagram of the PCM interface. Note that the serial data changes when the clock is rising and is latched when the clock is falling. LGE Internal Use Only - 5 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 53 Figure 3.13.4 Block diagram of digital circuit of audio front end Figure 3.13.5 Block diagram of digital circuit of audio front end LGE Internal Use Only - 53 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 54 This path is changeable. It will be xed after REV.B RCV/SPK BT + FM Radio (PCM, UART +I2C IF) Figure 3.13.6 A290 Audio Block Diagram LGE Internal Use Only - 54 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 55: Camera Interface

    Image Signal CHP_ ENABLE Processor Pixel Array (1324 X 1084) MCLK Column Decoder Figure 3.14.1 Camera Sensor Block Diagram LGE Internal Use Only - 55 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 56 Note1) User can control the amount of current by controlling bit[7:3] of PWRCTL[0x01:P0]. Above valuse are ouput current when bit[7:3] of PWRCTL[0x01:P0] is 5’b01010. Figure 3.14.3 Camera Sensor DC charicteristics LGE Internal Use Only - 56 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 57: Key Baclklight Led Interface

    C301 LD300 LD301 LD302 LD303 LD304 LD305 19-217_BHC-ZM1N2QY_3T EDLH0015101 BLUE LED KEYPAD_LED C319 Figure 3.15.1 Key Backlight Block LGE Internal Use Only - 57 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 58: Vibrator Interface

    MINI ABB is controlled by IC IF of MT653. VIBRATOR VIB_3V3 R312 VB300 C306 C307 VA300 Figure 3.16.1 Vibrator Driver Block LGE Internal Use Only - 58 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 59: Torch Led Interface

    MINI ABB is controlled by IC IF of MT653. TORCH TORCH_3V3 C310 LD306 Figure 3.17.1 Torch Driver Block LGE Internal Use Only - 59 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 60: Trouble Shooting

    Main Chip (MT653) U401 BT/FM combo chip (MT666) U400 TX Module (SKY77550) X100 Crystal, 6MHz Clock U0 SIM Switch(MT6306) LGE Internal Use Only - 60 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 61: Rx Trouble

    Check Crystal Circuit Check Mobile SW , TX module And Rx Circuit Re-download SW and Do calibration again LGE Internal Use Only - 61 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 62 See next page to check PLL Circuit Figure 4.2.1 RFVCO_MT FREF BT_CLK_26M C109 4.7u AU_VCM TSX-3225 26MHZ_7_4PF 26MHz XTAL1 XTAL2_GND X100 AVDD_RTC LGE Internal Use Only - 6 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 63 4.7n O1_1 C422 5.6p O1_2 DCS_RxP O2_1 PCS_RxN C423 6.8p L405 O2_2 L406 4.3n 5.6n C424 6.8p PCS_RxP LGE Internal Use Only - 63 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 64 Do calibration again MODE RF_VLOGIC RF_TX_EN RF_BS Stanby HIGH HIGH HIGH TX_LB HIGH HIGH TX_HB HIGH HIGH HIGH LGE Internal Use Only - 64 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 65: Tx Trouble

    Oscilloscope setting (1)Check Crystal Circuit Check Mobile SW &Tx module Check PLL Control Redownload SW or Do calibration again LGE Internal Use Only - 65 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 66 See next page to check PLL Circuit Figure 4.2.1 RFVCO_MT FREF BT_CLK_26M C109 4.7u AU_VCM TSX-3225 26MHZ_7_4PF 26MHz XTAL1 XTAL2_GND X100 AVDD_RTC LGE Internal Use Only - 66 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 67 O1_1 4.7n C422 5.6p O1_2 DCS_RxP O2_1 PCS_RxN C423 6.8p L405 O2_2 L406 4.3n 5.6n C424 6.8p PCS_RxP LGE Internal Use Only - 67 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 68 Do calibration again MODE RF_VLOGIC RF_TX_EN RF_BS Stanby HIGH HIGH HIGH TX_LB HIGH HIGH TX_HB HIGH HIGH HIGH LGE Internal Use Only - 68 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 69: Power On Trouble

    VRF(TP4) VSIM1(TP11) VHP_1V8 VSIM2(TP12) (TP9) VUSB(TP10) VTCXO (TP3) VCAMA(TP8) Figure 4.4.1 VSIM/VSIM2 U101 Figure 4.4.3 Remote power on LGE Internal Use Only - 69 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 70 C126 C127 C128 C129 C130 C131 C132 C133 C134 C135 4.7u 0.1u Figure 4.4.4 Power Block of LG-A290 LGE Internal Use Only - 70 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 71 Re-download software Does it work properly? The phone will Properly operating. Replace the main board LGE Internal Use Only - 71 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 72 USB2DP AUDL AUDR R250 HOOK_DET C252 VUSB_LDO_4V9 R232 DSS : High--> Default UART I2C_SDA1 I2C_SCL1 MUIC_INT Figure 4.5.2 LGE Internal Use Only - 7 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 73 Is the voltage Replace the at TP= 4.V U03 Battery is charged? Replace the main board Charging is properly operating LGE Internal Use Only - 73 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 74: Vibrator Trouble

    MUIC_IO_P FB209 MUIC_ACC_ID USB1DM R227 USB1DP R2_2K Figure 4.6.2 Figure 4.6.3 2.2K USB2DM CLDO USB2DP AUDL AUDR LGE Internal Use Only - 74 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes C252...
  • Page 75 ? (VB300). Is the voltage at TP1 Replace the U03 3.3V? Replace vibrator Vibrator Working well ! LGE Internal Use Only - 75 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 76: Lcd Trouble

    LCD_DATA00 INOUT_A4 INOUT_B4 R311 LCD_ID 100K 7.5pF C308 C309 CN301 GP : LOW LGIT : HIGH Figure 4.7.2 LGE Internal Use Only - 76 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 77 4. TROUBLE SHOOTING LGE Internal Use Only - 77 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 78 EMI filter ? FL300(TP,TP3,TP4), FL301, FL30 Does LCD work Replace LCD module properly ? LCD working well ! LGE Internal Use Only - 78 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 79: Camera Trouble

    4. TROUBLE SHOOTING 4.8 Camera Trouble CN302 VCAMA(TP1) VCAMD(TP2) FL303 FL304 Figure 4.8.1 I2C_SDA1(TP5) I2C_SCL1(TP6) U101 Figure 4.8.2 LGE Internal Use Only - 79 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 80 KROW2_GPIO11 KEY_ROW2 KROW1_GPIO12 KEY_ROW1 KROW0_GPIO13 KEY_ROW0 R106 R107 UTXD1 UART_TX 2.2K 2.2K URXD1 UART_RX URTS1_B_GPIO25 I2C_SDA1 UCTS1_B_GPIO24 I2C_SCL1 LGE Internal Use Only - 80 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 81 Graph 4.8.2. MCLK Waveform CAM_HSYNC CAM_VSYNC CAM_HSYNC CAM_PCLK 26MHz Graph 4.8.3.CAM_VSYNC vs. Graph 4.8.4.CAM_HSYNC vs. CAM_HSYNC Waveform CAM_PCLK Waveform LGE Internal Use Only - 81 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 82 EMI filter ? (TP3, TP4) Does Camera work Replace U101 or properly ? Change the board Camera working well ! LGE Internal Use Only - 8 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 83: Speaker/ Receiver Trouble

    KEY_ROW2 KROW1_GPIO12 KEY_ROW1 KROW0_GPIO13 KEY_ROW0 R106 R107 U101 UTXD1 UART_TX 2.2K 2.2K URXD1 UART_RX URTS1_B_GPIO25 I2C_SDA1 UCTS1_B_GPIO24 I2C_SCL1 LGE Internal Use Only - 83 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 84 Check the Audio Replace/ signal signal Change the U101 TP, TP4 TP3, TP4 Speaker Speaker Working well!! Working well!! LGE Internal Use Only - 84 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 85: Headset Trouble

    4. TROUBLE SHOOTING 4.10 3.5φ Headset Trouble TP1 Q200 Figure 4.10.1 LGE Internal Use Only - 85 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 86 R217 VA225 1.5Kohms C223 R254 HP_MIC_N 0.1u C224 C225 R255 HP_MIC_P HOOK_DET 0.1u VA226 C226 2.2u Figure 4.10.1 LGE Internal Use Only - 86 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 87 3.5 φ Headset at VA05? Speaker working well Resolder or Replace FB07 3.5 φ Headset Hook working well LGE Internal Use Only - 87 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 88: Microphone Trouble

    MIC200 C228 R220 MIC200 MAIN_MIC_P 0.1u C263 C229 C230 R222 MAIN_MIC_N 0.1u VA206 VA207 C231 C232 R223 2.2K LGE Internal Use Only - 88 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 89: Lge Internal Use Only

    Check the Change the microphone soldering of MIC00 Check the soldering of Resolder component TP,TP3,TP4,TP5,TP6 Microphone will work properly. LGE Internal Use Only - 89 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 90: Sim1 Card Interface Trouble

    VA209 VA210 VA211 VA212 VA213 VA214 VSIM2 C234 SIM2_RST R246 SIM2_CLK SIM2_DATA VA222 VA221 C261 VA223 Figure 4.13.1 LGE Internal Use Only - 90 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 91 Does it work Does it work Properly? Properly? SIM card is SIM card is properly working properly working. LGE Internal Use Only - 91 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 92 U202 VSIM4 SCLK4/GPIO10 SRST4/GPIO11 I2C_SCL2 C259 SIO4/GPIO12 VSIM2 I2C_SDA2 C234 SIM2_RST R246 SIM2_CLK SIM2_DATA VA222 VA221 C261 VA223 LGE Internal Use Only - 9 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 93 Change the main board Properly? Does it work Properly? SIM card is SIM card is properly working properly working. LGE Internal Use Only - 93 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 94: Sim3 Card Interface Trouble

    U202 VSIM4 SCLK4/GPIO10 SRST4/GPIO11 I2C_SCL2 C259 SIO4/GPIO12 VSIM2 I2C_SDA2 C234 SIM2_RST R246 SIM2_CLK SIM2_DATA VA222 VA221 C261 VA223 LGE Internal Use Only - 94 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 95 Change the main board Properly? Does it work Properly? SIM card is SIM card is properly working properly working. LGE Internal Use Only - 95 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 96: Key Backlight Trouble

    4. TROUBLE SHOOTING 4.15 KEY backlight Trouble LD305 LD302 LD300 LD303 LD301 LD304 Figure 4.14.1 LGE Internal Use Only - 96 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 97: Key Backlight

    VBAT = high ? Check U101 Check U101 KEYPAD_LED = Low ? Replace or resolder Backlight will work properly. LGE Internal Use Only - 97 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 98: Torch Trouble

    4. TROUBLE SHOOTING 4.16 Torch Trouble LD306 TORCH TORCH_3V3 C310 LD306 Figure 4.14.1 LGE Internal Use Only - 98 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 99 4. TROUBLE SHOOTING START TORCH_3V3 = 3.3V? Check U03 Replace or resolder Check U03 LED(LD306) Torch will work properly. LGE Internal Use Only - 99 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 100: Micro Sd Trouble

    C270 C235 VA209 VA210 VA211 VA212 VA213 VA214 VSIM2 C234 SIM2_RST R246 SIM2_CLK SIM2_DATA VA222 VA221 C261 VA223 LGE Internal Use Only - 100 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 101 Check out MMC_CLK & Data Re-download SW Timing OK? Replace Micro SD Card Micro SD Card will work properly LGE Internal Use Only - 101 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 102: Bluetooth Trouble

    GPIO0 VCC28OUT_FM TP402 BT_CLK_REQUEST SRCLKENA TESTMODE AVSS28_RF3 TP403 BT_32K EXT32K AVSS28_RF2 UTXD1 REXT BT_UART_RX R412 TP404 C427 C429 LGE Internal Use Only - 10 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 103 Check U101 circuit (VDD8) Check TP4 Check U101 circuit (BT_CLK_6M) Replace U100  U101 (MT6253) : Main Chip LGE Internal Use Only - 103 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 104: Fm Radio Trouble

    J200 VA200 VA201 VA202 M4-L C212 C213 M5-MIC J200 R256 VA205 VHP_MIC_2V0 LGE Internal Use Only - 104 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes BB side place R217 VA225 1.5Kohms...
  • Page 105 Filter Circuit (L00, C0) Give the additory Is the condition good? solder in L00, C0 Check U101 Circuit (VBAT_AMP) LGE Internal Use Only - 105 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 106: Download

    5. DOWNLOAD 5. DOWNLOAD LG-A90 LG-A90 LGE Internal Use Only - 106 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 107 5. DOWNLOAD LG-A90 LG-A90 LG-A90 LGE Internal Use Only - 107 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 108 5. DOWNLOAD LG-A90 LG-A90 LG-A90 LGE Internal Use Only - 108 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 109 5. DOWNLOAD LG-A90 LGE Internal Use Only - 109 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 110 5. DOWNLOAD LGE Internal Use Only - 110 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 111 5. DOWNLOAD LGE Internal Use Only - 111 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 112 5. DOWNLOAD ‘LG-A90’ LGE Internal Use Only - 11 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 113 5. DOWNLOAD LGE Internal Use Only - 113 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 114 5. DOWNLOAD LGE Internal Use Only - 114 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 115 5. DOWNLOAD LG-A90 ‘LG-A90’ LG-A90 LG-A90 LG-A90 LG-A90 LG-A90 ‘LG-A90’ LG-A90 LGE Internal Use Only - 115 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 116 5. DOWNLOAD LG-A90 LG-A90 LG-A90 LG-A90 LG-A90 LG-A90 LGE Internal Use Only - 116 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 117 5. DOWNLOAD LG-A90 LG-A90 LGE Internal Use Only - 117 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 118 5. DOWNLOAD LG-A90 LG-A90 LGE Internal Use Only - 118 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 119: Block Diagram

    FM Radio R/L Rx SAW SPEECH P/N AU_FMINR/L SPK PHONE P/N 26MHz 32KHz RCV/SPK (1500mAh Li-ion) (1500mAh, Li-ion) LGE Internal Use Only - 119 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 120: Circuit Diagram

    Back-up Battery R117 X101 100K FC-135 32.768KHz C137 C138 LOW : DEMUX HIGH : MUX OJ100 OJ101 OJ102OJ103 OJ104 LGE Internal Use Only - 120 - Copyright © 2012 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 121: Audio Subsystem

    SIM_CLK_2 GND4 GND1 DSS : High--> Default UART GND3 GND2 VA218 VA219 C254 VA220 C256 I2C_SDA1 I2C_SCL1 MUIC_INT LGE Internal Use Only - 121 - Copyright © 2012 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 122 VA309 VA310 VA311 CAM_RESET C313 C314 CAM_PD 7.5p C315 C316 C317 KEY_COL4 (DIF_D8) VA312 VA313 ENBY0034201 GB042-24S-H10-E3000 VA315 LGE Internal Use Only - 122 - Copyright © 2012 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 123 GPIO0 VCC28OUT_FM TP402 BT_CLK_REQUEST SRCLKENA TESTMODE AVSS28_RF3 TP403 EXT32K AVSS28_RF2 BT_32K BT_UART_RX UTXD1 REXT R412 TP404 C427 C429 LGE Internal Use Only - 123 - Copyright © 2012 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 124: Bga Pin Map

    8. BGA PIN MAP 8.BGA PIN MAP BGA IC pin check (U101) : not in use LGE Internal Use Only - 14 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 125 8. BGA PIN MAP BGA IC pin check (U100) Ball Diagram (Top View), PF38F5060M0Y3DK  : not in use LGE Internal Use Only - 15 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 126: Pcb Layout

    LD300 & LD303 LD301 & LD304 KB308 KB310 - No Key Backlight KB309 KB313 KB315 KB314 KB317 KB319 KB318 LG-A290_MAIN_EAX64452001_1.1_TOP LGE Internal Use Only - 126 - Copyright © 2012 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 127 - Tx Low power C411 C405 - Not good BER - No Service MIC200 - No MIC operation LG-A290_MAIN_EAX64452001_1.1_BOT LGE Internal Use Only - 127 - Copyright © 2012 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 128: Engineering Mode

    [8-6-3] Bluetooth UPF Test [--4] Camera [8-6-4] A BT Test [8-7] Enable Fake Lang [--5] Audio loopback [8-8] Heap freesize LGE Internal Use Only - 18 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 129: Rf Calibration

    11 1 1 C 11.1.1 Configuration of directory f di LGA90 LGA90 LGA90 LGA90 LGA90 2 / 6 LGE Internal Use Only - 19 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 130 It is written when ‘cal&auto’ is begun. ‘MODEL NAME’_Sequence.XML It is described a testing procedures. 3 / 6 LGE Internal Use Only - 130 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 131: How To Use Tachyon

    Follow the procedure before start calibration & auto test a. Click the icon, in tool bar. Then, You can make a choice of LG-A165 for loading cfg files before run. LG-A90 b. Select model name and then do double-click the buyer name.
  • Page 132 3) RF Auto test 4) After action - Phone reset - Change UE to AMSS 6 / 6 LGE Internal Use Only - 13 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 133: Exploded View & Replacement Part List

    PIFA Antenna,Multiple Cover Assembly,Front ACQ01 Tape,Window MJN00 MKC00 Window,LCD AEX00 Keypad Assembly,Main MCK00 Cover,Battery Rechargeable Battery,Lithium Ion EAC00 LGE Internal Use Only - 133 - Copyright © 2012 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 134: Replacementparts

    SERVEONE CO., LTD. Cover ACQ00 ACQ85749801 LGA290.ABRAZY BK:Black - Assembly,Rear MOLD PC LUPOY SC-1004A LGA290.ABRAZY MBG00 Button,Side MBG64406301 BK:Black - LGE Internal Use Only - 134 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 135 MKC64180501 CUTTING PMMA LGA290.ABRAZY BK:Black - Keypad AEX00 AEX73878201 LGA290.ABRAZY BK:Black - Assembly,Main MEZ002100 Label,Approval MEZ64403301 COMPLEX LGA290.ABRASV ZZ:Without Color - LGE Internal Use Only - 135 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 136 LGA290.ABRASV ZZ:Without Color LGA290 AGF000000 Package Assembly AGF76407301 BRA(Brazil Package) AAD000000 Addition Assembly AAD85994601 LGA290.ABRASV ZY:Color Unfixed - LGE Internal Use Only - 136 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 137: Main Component

    R/TP - ROHM. GRM155R71H561K 560pF 10% 50V X7R - Capacitor C268 ECZH0003118 55TO+125C 1005 R/TP - MURATA Ceramic,Chip MANUFACTURING CO.,LTD. LGE Internal Use Only - 137 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 138 1005 R/TP - ROHM Semiconductor KOREA Ceramic,Chip CORPORATION FB204 MCR01MZSJ000 0OHM 5% 1/16W 1005 R/TP - Resistor,Chip ERHZ0000401 FB206 ROHM. LGE Internal Use Only - 138 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 139 GRM36X7R104K10PT 100nF 10% 10V X7R - Capacitor C211 ECZH0003103 55TO+125C 1005 R/TP - MURATA Ceramic,Chip C223 MANUFACTURING CO.,LTD. C225 C228 C230 LGE Internal Use Only - 139 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 140 ICVS0505500FR 5.6V 0% 50F 1.0*0.5*0.55 - SMD Varistor SEVY0005402 VA226 R/TP INNOCHIPS TECHNOLOGY VA302 VA303 VA305 VA306 VA308 VA309 VA311 VA314 VA315 LGE Internal Use Only - 140 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 141 CL05A225MQ5NSNC 2.2uF 20% 6.3V X5R - C217 Capacitor ECCH0000198 55TO+85C 1005 R/TP . SAMSUNG ELECTRO- C218 Ceramic,Chip MECHANICS CO., LTD. C219 C226 LGE Internal Use Only - 141 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 142 GRM1555C1H5R6C 5.6pF 0.25PF 50V NP0 - Capacitor C421 ECCH0000185 55TO+125C 1005 R/TP - MURATA Ceramic,Chip C422 MANUFACTURING CO.,LTD. LGE Internal Use Only - 14 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 143 ERHZ0000499 - ROHM. IC,Audio Sub TPA2055D3 1.6~5.5V 0W WLCSP R/TP 20P - U200 EUSY0420001 System TEXAS INSTRUMENTS INCO. LGE Internal Use Only - 143 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 144 SMD R/TP 10P EPCOS PTE LTD. GB042-24S-H10-E3000 24P 0.40MM STRAIGHT CN302 Connector,BtoB ENBY0034201 SOCKET SMD R/TP 1M - LS Mtron Ltd. LGE Internal Use Only - 144 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 145 55TO+125C 1005 R/TP 0.5 SAMSUNG ELECTRO- Ceramic,Chip MECHANICS CO., LTD. MCR01MZP5J105 1MOHM 5% 1/16W 1005 R/TP - R200 Resistor,Chip ERHZ0000407 ROHM. LGE Internal Use Only - 145 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 146 Assembly YUDEN.CO., LTD. Connector,Terminal KQ03LV1-3R 3P 2.50MM ANGLE SMD T/REEL CN300 EAG62810901 Block NEMO HIROSE ELECTRIC CO., LTD. LGE Internal Use Only - 146 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 147 NONE SMD R/TP INNOCHIPS TECHNOLOGY KJA-PH-0-0183 4P 4P ANGLE R/TP 3.5M BLACK J200 Jack,Phone EAG63010701 5P Reverse shape KSD CO., LTD LGE Internal Use Only - 147 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 148 EBR071700 Assembly,Main EBR74263101 LGA290.ABRAZY 1.0 Main SMT Top EAX010000 PCB,Main EAX64452001 LGA290.ABRAZY 1.1 FR-4 SBL 6 0.8 Main LGE Internal Use Only - 148 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 149 19-217/BHC-ZM1N2QY/3T BLUE 2.7~3.2 25mA LD302 LED,Chip EDLH0015101 18~45mcd 465~475nm 95mW 1608 R/TP 2P - LD303 EVERLIGHT ELECTRONICS CO., LTD. LD304 LD305 LGE Internal Use Only - 149 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 150 VA309 VA311 VA314 VA315 PIFA KI-M08720 QUAD -2DB 5 Metal Stamping Type - EAA00 EAA62764501 Antenna,Multiple KOMATECH CO.,LTD LGE Internal Use Only - 150 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 151: 1.3 Accessory

    (Top cap screw joint), WW, Up LG Chem,LTD. COMPLEX LGA290.ABRASV ZZ:Without Color Full MFL053800 Manual,Operation MFL67450001 manual for LG290 ABRA LGE Internal Use Only - 151 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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