LG -A270 Service Manual
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LG -A270 Service Manual

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Internal Use Only
Service Manual
LG-A270
Date: April, 2012 / Issue 1.0

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Summary of Contents for LG LG-A270

  • Page 1 Internal Use Only Service Manual LG-A270 Date: April, 2012 / Issue 1.0...

  • Page 2: Table Of Contents

    4.6 Charging Trouble ................... 56 4.7 Vibrator Trouble ..................58 4.8 LCD Trouble ..................... 60 4.9 Speaker Trouble ..................6 LGE Internal Use Only -  - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 3: Introduction

    LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 3 - Copyright ©...
  • Page 4 When returning system boards or parts like EEPROM to the factory, use the protective package as described. LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 4 - Copyright ©...

  • Page 5: Abbreviations

    Light Emitting Diode OPLL Offset Phase Locked Loop LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 5 - Copyright © 01 LG Electronics. Inc. All right reserved.
  • Page 6 VCTCXO Voltage Control Temperature Compensated Crystal Oscillator Wireless Application Protocol LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 6 - Copyright © 01 LG Electronics. Inc. All right reserved.

  • Page 7: System Specification

    Voice Recoding Not Support Microphone LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 7 - Copyright © 01 LG Electronics. Inc. All right reserved.
  • Page 8 Camera Not Support FM Radio LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 8 - Copyright © 01 LG Electronics. Inc. All right reserved.

  • Page 9: Technical Specification

    0dBm ± 5dB ±3dB LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 9 - Copyright © 01 LG Electronics. Inc. All right reserved.
  • Page 10 (due to switching transient) 1,200 1,800 LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 10 - Copyright © 01 LG Electronics. Inc. All right reserved.
  • Page 11 3,400 4,000 -5±3 dB LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 11 - Copyright © 01 LG Electronics. Inc. All right reserved.
  • Page 12 Fast Charge : Typ. 410 mA Charge Current Total Charging Time : < 3.5 hours LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 1 - Copyright ©...
  • Page 13 Input: 100 ~ 240V, 50/60 Hz Travel Charger Output: 4.8 V, 400 mA LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 13 - Copyright ©...

  • Page 14: Technical Brief

    3. TECHNICAL BRIEF 3. TECHNICAL BRIEF 3.1 Digital Main Processor Figure. 3.1.1 MT6251 Hardware Block Diagram LGE Internal Use Only - 14 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 15 -sigma ADC converts the downlink IF baseband -bit D/A converter for Automatic Power Control (APC) LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 15 - Copyright ©...
  • Page 16 3.1.5 FM features – 108 MHz worldwide FM bans with 50 kHz tuning step LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 16 - Copyright ©...

  • Page 17: Power Management

    Buck Mode LDO Mode VCORE VCORE VBAT_VCORE VBAT_VCORE VCORE VCORE VCORE VCORE Buck Buck Controller Controller VCORE_FB VCORE_FB LGE Internal Use Only - 17 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 18 The SIM LDO is a linear regulator that could source 100mA (max) with 1.8V or 3.0V output LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 18 - Copyright ©...
  • Page 19 Real-time clock Table.3.2.2 Power supply Comains Table. 3.2.2 Power supply Domains LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 19 - Copyright © 01 LG Electronics. Inc. All right reserved.
  • Page 20 When the battery voltage is gradually lowering, it will enter the UVLO state, and the PMU will be turned off by itself, except for VRTC LDO, to prevent further discharging. LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 0 - Copyright ©...
  • Page 21 RESETB 00ms Figure.3.2.3 Power-on/off Control Sequence LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 1 - Copyright © 01 LG Electronics. Inc. All right reserved.

  • Page 22: Fem With Integrated Power Amplifier Module

    RF switch. The GaAs die, Switch die and passive components are mounted on a multi-layer laminate substrate. The assembly is encapsulated with plastic overmold. LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only -  - Copyright ©...
  • Page 23 0.5p PGND Tx_LB_IN C321 VBAT C397 RF_LB_TX 4.7uF,10V ,M ,X5R ,HD ,1608 ,R/TP Figure 3.3.3 FEM CIRCUIT DIAGRAM LGE Internal Use Only - 3 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 24: Crystal(6 Mhz, X100)

    These blocks with shadow are analog circuits. These blocks with shadow are analog circuits. LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 4 - Copyright ©...

  • Page 25: Rfsys Of Mt651 (U100)

    - 96 dB dynamic range ADC - 24dB PGA gain with 6dB gain step LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 5 - Copyright ©...
  • Page 26 - On-chip programmable capacitor array for coarse tune - On-chip programmable capacitor array for fine tune LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 6 - Copyright ©...

  • Page 27: Memory(Fm5Q3, U101)

    1,024 erasable sectors and 64 erasable blocks respectively. The small 4KB sectors allow for greater flexibility in applications that require data and parameter storage. LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 7 - Copyright ©...
  • Page 28 Additionally, the device supports JEDEC standard manufacturer and device identification with a 4K-bit Secured OTP. LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 8 - Copyright ©...

  • Page 29: Sim Card Interface

    This signal makes SIM card to HW default status. SIM CLK 1 This signal is transferred to SIM card. SIM_DATA_1 This signal is interface datum. LGE Internal Use Only - 9 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 30: Display Interface

    LSCE#, LSDA and LSCK , to enter commands and date. In the 3-wire mode , an extra bit representing the LSA0 pin is transferred before the MSB of each transaction. LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 30 - Copyright ©...
  • Page 31 -- HW dimming control by LGE Internal Use Only - 31 - Copyright © 01 LG Electronics. Inc. All right reserved. LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 32: Battery Charger Interface

    The RT9524 is available in a WDFN-10L 2x3 package to achieve optimized solution for PCB space and thermal considerations. LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 3 - Copyright ©...

  • Page 33: Keypad Interface

    R261 KEY_OUT4 VA208 R262 KEY_IN0 R263 KEY_IN1 R264 KEY_IN2 R265 KEY_IN3 R266 KEY_IN4 Figure 3.10.1 MAIN KEY STRUCTURE LGE Internal Use Only - 33 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 34 Figure 3.10.2 Block Diagram and System Integration of the KPD Figure 3.10.2 Block Diagram and System Integration of the KPD LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 34 - Copyright ©...

  • Page 35: Audio Front-End

    FM radio playback paths are also provided. The audio stereo path facilitates CD-quality playback, external FM radio and voice playback through a headset. Figure.3.11.1 Audio Front-End LGE Internal Use Only - 35 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 36 DAI) block communicates with the system simulator for FTA or external Bluetooth Figure.3.11.2 Digital circuits in Audio Front-End LGE Internal Use Only - 36 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 37 Rin> 13KΩ AU_VIN0_N Figure 3.11.3 Typical Microphone Supply Generation (alternative) LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 37 - Copyright © 01 LG Electronics. Inc. All right reserved.

  • Page 38: Key Baclklight Led Interface

    R231 R232 R233 R234 C230 LD200 LD201 LD202 LD203 M_KEY_LED1 M_KEY_LED2 VA215 VA214 Figure 3.12.1 Key Backlight Block LGE Internal Use Only - 38 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 39: Vibrator Interface

    Vibrator Figure 3.13.1 Vibrator Driver Block Diagram Figure 3.13.1 Vibrator Driver Block Diagram LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 39 - Copyright ©...

  • Page 40: Torch Led Interface

    Current is controlled by SW and Max Current is 150mA. VBAT VA408 LD400 LD410 LD420 TORCH_LED VA404 Figure 3.14.1 Torch LED Block 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

    DAT2 TF_CHECK CD_DAT3 TF_CMD TF_CLK CARD_DETECT TF_DATA0 DAT0 DAT1 C409 COVER_DETECT1 R541 VA405 VA407 VA406 SCHB1B0201 ENSY0023802 TP400 LGE Internal Use Only - 41 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 42: Trouble Shooting

    4.1 RF Component U101 U100 U300 X100 U100 U100Main Chip (MT651) U101 Memory U300 PAM (SKY77550) X100 6MHz Clock LGE Internal Use Only - 4 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 43: Rx Trouble

    (1) Check Crystal Circuit () CheckMobile SW &PAM RX (3) Check PLL Control Re-download or Do calibration again LGE Internal Use Only - 43 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 44 Figure 4.2.2 Figure 4.2.3 LGE Internal Use Only - 44 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes...
  • Page 45 SKY77550 RF_VLOGIC VSW_EN R370 GND10 Tx_HB_IN C301 GND9 RF_HB_TX PGND Tx_LB_IN VBAT C397 RF_LB_TX Figure 4.2.6 Figure 4.2.2 LGE Internal Use Only - 45 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 46 Tx_HB Rx1 and Rx are broadband receive ports and each supports the GSM850, GSM900, DCS, and PCS bands. LGE Internal Use Only - 46 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 47: Tx Trouble

    (1) Check Crystal Circuit () Check Mobile SW &PAM TX (3) Check PLL Control Re-download or Do calibration again LGE Internal Use Only - 47 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 48 Figure 4.3.2 Figure 4.2.2 Figure 4.3.3 LGE Internal Use Only - 48 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved.
  • Page 49 SKY77550 RF_VLOGIC VSW_EN R370 GND10 Tx_HB_IN C301 GND9 RF_HB_TX PGND Tx_LB_IN VBAT C397 RF_LB_TX Figure 4.2.2 Figure 4.3.6 LGE Internal Use Only - 49 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 50 Tx_HB Rx1 and Rx are broadband receive ports and each supports the GSM850, GSM900, DCS, and PCS bands. LGE Internal Use Only - 50 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 51: Fm Radio Trouble (Wired 3.5 Phi/Wireless)

    4.4 FM Radio Trouble (Wired 3.5 phi/wireless) C406 L404 FM_ANT 0.1uH C422 D400 L401 100n R455 FM_ANT_GND Figure 4.2.2 LGE Internal Use Only - 51 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 52 A condition is good? (TP1,,3,4,5) A condition is good? Replace U100 Check Bias Voltage Replace U100 FM_radio willwork properly LGE Internal Use Only - 5 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 53: Power On Trouble

    Figure 4.5.3 Figure 4.5.3 Figure 4.5.2 LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 53 - Copyright © 01 LG Electronics. Inc. All right reserved.
  • Page 54 C117 C113 VUSB VIO18 VSIM2 C122 GND1_1 GND1_2 GND1_3 GND1_4 GND1_5 GND1_6 Figure 4.5.4 Power block of LG-A270 LGE Internal Use Only - 54 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 55 Is the phone power on? Does it work properly? The phone will Properly operating. Replace the main board LGE Internal Use Only - 55 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 56: Charging Trouble

    CHG_EOC GND1 CHGSB GND2 CHG_EN IEOC EN_SET C239 C240 EUSY0410801 (10V) C241 0.1u RT9524 (25V) (10V) Figure 4.6.2 LGE Internal Use Only - 56 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 57 Is the voltageat TP = 4.9V ? Replace U01 Battery is charged? Replace U100 Charging is properly operating LGE Internal Use Only - 57 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 58: Vibrator Trouble

    4.7 Vibrator Trouble Vibrator PAD R237 R238 Figure 4.7.1 R237 VB200 L201 R238 VIB_P C231 C232 Figure 4.7.2 LGE Internal Use Only - 58 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 59 Clean the vibrator pad Vibrator Working well ! LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 59 - Copyright © 01 LG Electronics. Inc. All right reserved.

  • Page 60: Lcd Trouble

    VBAT VIO28 LGE Internal Use Only Figure 4.8.3 Copyright © 2012 LG Electronics. Inc. All right reserve O nly for training and service purposes LGE Internal Use Only - 60 - Copyright © 01 LG Electronics. Inc. All right reserved.
  • Page 61 Check the voltage at each pin of TP3 pin.(R495~499) changeslow to high? Replace LCD Module Does LCD Work Properly? LCD working well ! LGE Internal Use Only - 61 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 62: Speaker Trouble

    4. TROUBLE SHOOTING 4.9 Speaker Trouble CN201 Speaker contact pad Figure 4.9.1 Figure 4.9.2 LGE Internal Use Only - 6 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 63 VA200 VA201 EDTY0012501 R251 SPK_N 4.7n 4.7n VA228 VA227 ECCH0000151 SEVY0003901 5.5 V, ,SMD ,480pF, 1005 Figure 4.9.3 LGE Internal Use Only - 63 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 64 Clean CN01 or Change the Speaker Properly? Make a phone call Re-Download Check the audio signa lTP1 Speaker working well ! LGE Internal Use Only - 64 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 65: Earphone Trouble

    4. TROUBLE SHOOTING 4.10 Earphone Trouble J400 Figure 4.10.1 LGE Internal Use Only - 65 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 66 R542 HS_MIC_N 0.1uF C512 1.5K C416 39pF HS_MIC_P 0.1uF C513 R420 100ohms C418 39pF C419 HS_HOOK_DET Figure 4.10.2 LGE Internal Use Only - 66 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 67 Change another Headset and Check the audio signal Try again or Re-solder J400 Earphone working well ! LGE Internal Use Only - 67 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 68: Microphone Trouble

    39pF SUMY0003815 C219 R219 MIC200 MAIN_MIC_N 100ohms 0.033uF VA202 VA203 R220 C220 C221 2.2Kohms 39pF 39pF Figure 4.11.2 LGE Internal Use Only - 68 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 69 Microphone will work properly. LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 69 - Copyright © 01 LG Electronics. Inc. All right reserved.

  • Page 70: Sim Card Interface Trouble

    4.12 SIM Card Interface Trouble J200 SIM_CONNECTOR_1 VSIM1 VSIM1 VSIM1 J200 GND1 SIM_RST_1 SIM_DATA_1 SIM_CLK_1 C223 GND5 GND2 GND4 GND3 Figure 4.12.2 LGE Internal Use Only - 70 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 71 Change the SIM Card. Or Re-download TP1 Is 3V or 1.8V? Or Re-solder J00 SIM Card will workproperly. LGE Internal Use Only - 71 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 72: Key Backlight Trouble

    4.13 KEY backlight Trouble VBAT R231 R232 R233 R234 C230 LD200 LD201 LD202 LD203 M_KEY_LED1 M_KEY_LED2 VA215 VA214 Figure 4.13.2 LGE Internal Use Only - 7 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 73 Replace the main board TP1 = low ? Check the state of LED or U100 Backlight will work properly. LGE Internal Use Only - 73 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 74: Torch Light Trouble

    4.14 Torch Light Trouble LD410 LD400 LD420 Figure 4.14.1 VBAT VA408 LD400 LD410 LD420 TORCH_LED VA404 Figure 4.14.2 LGE Internal Use Only - 74 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 75 Re-soldering R407,VA404 When Torch on? Check the soldering each Are all LEDs Working? LED(LD400,LD410,LD40) Torch will work properly. LGE Internal Use Only - 75 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 76: Micro Sd Trouble

    CD_DAT3 TF_CMD TF_CLK CARD_DETECT TF_DATA0 DAT0 DAT1 C409 COVER_DETECT1 R541 VA405 VA407 VA406 SCHB1B0201 ENSY0023802 TP400 Figure 4.15.2 LGE Internal Use Only - 76 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 77 Check out TF_CLK & Re-download SW Data0Timing OK? Replace Micro SD Card Micro SD Card will work properly LGE Internal Use Only - 77 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 78: Download

    5. DOWNLOAD 5. DOWNLOAD LG-A70 LG-A70 LGE Internal Use Only - 78 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 79 5. DOWNLOAD LG-A70 LG-A70 LG-A70 LGE Internal Use Only - 79 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 80 5. DOWNLOAD LG-A70 LG-A70 LG-A70 LGE Internal Use Only - 80 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 81 5. DOWNLOAD LG-A70 LGE Internal Use Only - 81 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 82 5. DOWNLOAD 130kΩ 130kΩ LGE Internal Use Only - 8 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 83 5. DOWNLOAD LGE Internal Use Only - 83 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 84 5. DOWNLOAD ‘LG-A70’ LGE Internal Use Only - 84 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 85 5. DOWNLOAD LGE Internal Use Only - 85 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 86 5. DOWNLOAD LGE Internal Use Only - 86 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 87 5. DOWNLOAD LG-A70 ‘LG-A70’ LG-A70 LG-A70 LG-A70 LG-A70 LG-A70 ‘LG-A70’ LG-A70 LGE Internal Use Only - 87 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 88 5. DOWNLOAD LG-A70 LG-A70 LG-A70 LG-A70 LG-A70 LG-A70 LGE Internal Use Only - 88 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 89 5. DOWNLOAD LG-A70 LG-A70 LGE Internal Use Only - 89 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 90 5. DOWNLOAD LG-A70 LG-A70 LGE Internal Use Only - 90 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 91: Block Diagram

    Connector Connector Keypad Charging only SIM Card#1 SD CARD Battery Flash Vibrator LED 3 LED 3 Headset LGE Internal Use Only - 91 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 92: Circuit Diagram

    SPK_N JTAG_TDO JTDO SPK_P SPK_P JTMS JTAG_TMS JTAG_TRST_B JTRST_B AUXIN6_PAVDET HS_HOOK_DET AUXIN7 BAT_TEMP AUXIN8 ACC_ID FLYN FLYP FILKOR - 92 - LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 93 C510 C511 CN290 KEY_IN0 R270 C242 ZD501 R263 6.8p 5.6p DNI_TCTAL1A107M8R KEY_IN1 R264 KEY_IN2 R265 KEY_IN3 R266 KEY_IN4 - 93 - LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 94 L314 C301 C370 GND9 RF_HB_TX 0.5p PGND Tx_LB_IN C321 VBAT C397 RF_LB_TX 4.7uF,10V ,M ,X5R ,HD ,1608 ,R/TP - 94 - LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 95 VA406 A270/A275 : Mount SCHB1B0201 ENSY0023802 A240 : Not mount VBAT TP400 VA408 LD400 LD410 LD420 TORCH_LED VA404 - 95 - LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 96: Bga Pin Map

    * Ball Diagram (Top View), MT6251 ( Mediatek ) Not USE Not USE LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 96 - Copyright ©...

  • Page 97: Pcb Layout

    R244 R260 VA207 R220 - No Key Light on C219 C218 KB211 KB213 KB212 LD202 LD201 _TOP LGA270_MAIN_EAX64750301_1.0_TOP - 97 - LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 98 J400: 3.5pi connector LD400,410,420: Torch LED LD420 LD410 - No headset function - No torch light on LD400 LGA270_MAIN_EAX64750301_1.0_BOT _BOT - 98 - LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 99: Engineering Mode

    ‘select’ key to progress the test. Pressing ‘back key will switch back to the original test menu. LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 99 - Copyright ©...

  • Page 100: Auto Calibration

    GSM phone. 11.2 Directory structure of Tachyon “C LGE Tachyon” LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 100 - Copyright ©...

  • Page 101: Description Of Folder & File

    -. Model_NV.ini : default NV data. -. Model_Sequence.xml : stored calibration and auto test procedure. LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 101 - Copyright ©...

  • Page 102: How To Use Tachyon

    < Example of selection of model name> Solution : MTK Model : LGA270 LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 10 - Copyright ©...
  • Page 103 4) After action - Phone reset - Change UE to AMSS LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 103 - Copyright © 01 LG Electronics. Inc. All right reserved.
  • Page 104 10. Run Option 11. Voltage / Current Setting 12. Show Result LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 104 - Copyright © 01 LG Electronics. Inc. All right reserved.

  • Page 105: Target Power

    30.0 dBm 30.0 dBm 30.0 dBm LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. O nly for training and service purposes LGE Internal Use Only - 105 - Copyright © 01 LG Electronics. Inc. All right reserved.

  • Page 106: Exploded View & Replacement Part List

    PCB Assembly,Main EBR00 Dome Assembly,Metal ADB00 LCD Module EAJ00 Can,Shield MBK00 Microphone,Condenser SUMY00 Rechargeable Battery,Lithium Ion EAC00 Cover,Battery MCK00 - 106 - LGE Internal Use Only Copyright © 2012 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 107: Replacementparts

    ACQ85922501 LGA270.ATHABK BK:BLACK BLACK - Assembly,Rear MEZ002100 Label,Approval MEZ64566901 COMPLEX LGA270.ASEABK BK:BLACK BLACK - MJN061100 Tape,Protect MJN68167401 COMPLEX LGA270.ASEABK BK:BLACK BLACK - LGE Internal Use Only - 107 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 108 PRINTING CG300 CGR DG ZZ:Without Color MEZ047200 Label,Master Box MLAJ0004402 LABEL MASTER BOX(for CGR TDR 2VER. mbox_label) GSM standard_master box label LGE Internal Use Only - 108 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 109 AAD86110402 LGA270.ATCLBK BK:BLACK BLACK - MOLD LUPOY LGA270.ATHABK BK:BLACK MCK00 MCK00 Cover Battery Cover,Battery MCK67135601 MCK67135601 BLACK - LGE Internal Use Only - 109 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 110 19-217/BHC-ZM1N2QY/3T BLUE 2.7~3.2 25mA LD201 LED,Chip EDLH0015101 18~45mcd 465~475nm 95mW 1608 R/TP 2P - LD202 EVERLIGHT ELECTRONICS CO., LTD. LD203 LGE Internal Use Only - 110 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 111 55TO+125C 1005 R/TP - TDK KOREA Ceramic,Chip COOPERATION VA202 EVL5M02200 5.5V 0% 480F 1.0*0.5*0.6 NONE Varistor SEVY0003901 VA203 SMD R/TP AMOTECH CO., LTD. LGE Internal Use Only - 111 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 112 55TO+125C 1005 R/TP - TDK KOREA C317 Chip COOPERATION MCR01MZP5F3902 39KOHM 1% 1/16W 1005 R111 Resistor,Chip ERHZ0000279 R/TP - ROHM. LGE Internal Use Only - 11 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 113 C1005X7R1H471KT000F 470pF 10% 50V X7R - C411 Capacitor ECZH0001121 55TO+125C 1005 R/TP - TDK KOREA C412 Ceramic,Chip COOPERATION LGE Internal Use Only - 113 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 114 GRM188R61A225K 2.2uF 10% 10V X5R - Capacitor C112 ECCH0005603 55TO+85C 1608 R/TP - MURATA Ceramic,Chip C118 MANUFACTURING CO.,LTD. C134 LGE Internal Use Only - 114 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 115 CL05C270JB5NNNC 27pF 5% 50V NP0 - Capacitor C403 ECCH0000117 55TO+125C 1005 R/TP 0.5 SAMSUNG ELECTRO- Ceramic,Chip C404 MECHANICS CO., LTD. C405 LGE Internal Use Only - 115 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 116 Ceramic,Chip COOPERATION Capacitor C1608X5R0J475KT000N 4.7uF 10% 6.3V X5R - C115 ECCH0006201 Ceramic,Chip 55TO+85C 1608 R/TP - TDK CORPORATION LGE Internal Use Only - 116 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 117 LQG15HS5N6S02D 5.6NH 0.3NH - 300mA 0.2OHM L306 Inductor ELCH0003836 4.5GHZ 8 SHIELD NONE 1.0X0.5X0.5MM R/TP L312 Multilayer,Chip MURATA MANUFACTURING CO.,LTD. LGE Internal Use Only - 117 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 118 55TO+125C 1005 R/TP - MURATA Ceramic,Chip MANUFACTURING CO.,LTD. Base V10a - CENTRAL AND SOUTH AMERICA SAD010000 Software,Mobile SAD33383701 MTK - LGE Internal Use Only - 118 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 119: 1.3 Accessory

    Manual for LGA270 TCL STA-U35WD2 100-240V 4.8V 400mA 50-60Hz EAY060000 Adapters EAY62389701 UL/CSA, CB WALL 2P USB - DONGDO ELECTRONICS CO.,LTD LGE Internal Use Only - 119 - Copyright © 01 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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