LG -T325 Service Manual
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LG -T325 Service Manual

LG -T325 Service Manual

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Internal Use Only
Service Manual
LG-T325
Date: October, 2010 / Issue 1.0

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Summary of Contents for LG LG-T325

  • Page 1 Internal Use Only Service Manual LG-T325 Date: October, 2010 / Issue 1.0...

  • Page 2: Table Of Contents

    4.5 WCDMA Band1/8 Power Amplifier Module .......66 4.6 WCDMA Band1/8 Low Noise Amplifier .......67 4.7 WCDMA Band1 Duplexer ............68 4.8 WCDMA Band8 Duplexer ............69 -  - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 3 - 4 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 4: Introduction

    - 5 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 5: Notice Of Radiated Emissions

    • When returning system boards or parts like EEPROM to the factory, use the protective package as described. - 6 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 6: Abbreviations

    Offset Phase Locked Loop Power Amplifier Module Printed Circuit Board Programmable Gain Amplifier Phase Locked Loop PSTN Public Switched Telephone Network - 7 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 Voltage Controlled Oscillator VCTCXO Voltage Control Temperature Compensated Crystal Oscillator Wireless Application Protocol 8PSK 8 Phase Shift Keying - 8 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 8: Performance

    WLAN 802.11g : 2400 – 2483.5 MHz Application Standard WAP 2.0, JAVA 2.1 - 9 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Copyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 9: Main Parts : Solution

    E2 (PCS) GPRS compatibility GPRS Class 12 EDGE compatibility EDGE Class 12 Display Main LCD(2.8”, 240 x 400)/TFT - 10 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 10 V2.1 with A2DP Voice Recording Speaker Phone mode Support Travel Adapter CDROM Stereo Headset Data Cable T-Flash Not Equipped - 11 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 11: Hw Spec

    ± 800kHz, ± 1600kHz : -98dBm/-96dBm (2.439%) channels AM Suppression -98dBm/-96dBm (2.439%) -SM : -31dBm - DCS : -29dBm Timing Advance ± 0.5T - 12 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 12 < 17.5 %, when Pout ≥ -20 dBm Peak Code Domain Error < -15 dB at Pout -20 dBm - 1 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 13 Inner Loop Power Control In Uplink Adjust output(TPC command) +0.5/1.5 +1/3 +1.5/4 -0.5/+0.5 -0.5/+0.5 -0.5/+0.5 -0.5/-1.5 -1/-3 -1.5/-4 group(10equal command group) +8/+12 +16/+24 - 14 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 14 > 33 dB @ ±5 MHz Power Ratio (ACLR) > 43 dB @ ±10 MHz Error Vector Magnitude 3GPP Not Complete - 15 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 15 Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0 (BLER or R), 16QAM Only BLER < 10% or R >= 700kbps - 16 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 16: Bb Circuit Technical Brief

    6CH, 4LDO PMB6821 CAMERA 5MP [Figure 3.1-1] Functional Block Diagram - 17 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes Copyright 2008 LG Electronics. Inc. All right reserved.

  • Page 17: Baseband Processor Introduction

    3. BB CIRCUIT TECHNICAL BRIEF 3.2 Baseband Processor Introduction [Figure 3.2-1] Top level block diagram of S-GOLD®3H(PMB8878) - 18 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 18: General Description

    - 48k x 16bit Data XRAM - 5k x 16bit Data YRAM - Incremental Redundancy(IR) Memory of 35904 words of 16bit - 19 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 19: Clock System

    - Programmable PLL with four additional phase shifters for system clock generation - GSM Timer Module that off-loads the CPU from radio channel timing - 20 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 20 · 4 Monitor pins for important internal signals and most pad signals · Cerberus debugging unit - 2 General Purpose Timers with 3 32-bit timers - Serial number - 21 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 21 T_OUT5 T_OUT6 PA_MODE PAM Mode select T_OUT7 ANT_SEL2 T_OUT8 ANT_SEL3 T_OUT9 TOUCH_INT T_OUT10 F_MODE T_IN0 LCD_BL_CTRL T_IN1 CHG_EN - 22 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 22: Adc Channel

    Battery temperature measure RF_TEMP RF block temperature measure HW revision reserved pin VBAT (divide resistor) Battery supply voltage measure - 2 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 23 *USIF2: Universal Serial IF USIF2_RXD_MRST NA( GPIO not available) USIF2_TXD_MTSR RPWRON USIF2_RTS_N BT_UART_RTS USIF2_CTS_N BT_UART_CTS *USIF3: Universal Serial IF USIF3_RXD_MRST UART_BT_RX - 24 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 24 DIF_D2 LCD_DATA02 DIF_D3 LCD_DATA03 DIF_D4 LCD_DATA04 DIF_D5 LCD_DATA05 DIF_D6 LCD_DATA06 DIF_D7 LCD_DATA07 DIF_D8 LCD_ID DIF_CS1 NLCD_MAIN_CS DIF_CS2 MMC_DETECT - 25 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 NA(GPIO NOT available) *MMCI1: Card Connector MMCI1_CMD WLAN_CMD MMCI1_DAT[0] WLAN_SDIO[0] MMCI1_CLK WLAN_CLK *MMCI1: SD-Extension MMCI1_DAT[1] WLAN_SDIO[1] MMCI1_DAT[2] WLAN_SDIO[2] MMCI1_DAT[3] WLAN_SDIO[3] - 26 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 26 NA( NOT available) AUXP1 NA( NOT available) AUXN2 NA( NOT available) AUXP2 NA( NOT available) AUXGND GND(bypass cap, 0.2u) - 27 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 NA( NOT available) *Bandgap reference: Analog Interface VREFP VREFN IREF GND (22K, 2%) *JTAG TRST_n TRSTN RTCK RTCK *Debug - 28 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 28 MEM_AD[4] DATA[4] MEM_AD[5] DATA[5] MEM_AD[6] DATA[6] MEM_AD[7] DATA[7] MEM_AD[8] DATA[8] MEM_AD[9] DATA[9] MEM_AD[10] DATA[10] MEM_AD[11] DATA[11] MEM_AD[12] DATA[12] - 29 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 MEM_BFCLKO2 SDCLKI MEM_SDCLKO SDCLKO MEM_BC0_n _BC0 MEM_BC1_n _BC1 MEM_BC2_n LDQS MEM_BC3_n UDQS MEM_A[0] ADD[0] MEM_A[1] ADD[1] MEM_A[2] ADD[2] - 0 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 30 T_OUT2 ANT_SEL1 T_OUT3 HOOK_DETECT T_OUT4 _EOC T_OUT5 WLAN_REG_ON T_OUT6 PA_MODE T_OUT7 ANT_SEL2 T_OUT8 ANT_SEL3 T_OUT9 TOUCH_INT T_OUT10 F_MODE - 1 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 NA(GPIO NOT available) RTC_OUT RTC_OUT *Extra I/Os & Interrupt Inputs DSPIN0 CLK32K DSPOUT1 NA(GPIO NOT available) DSPIN1 VIB_PWM - 2 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 32: Power Management Ic

    • Interrupt channels for peripherals • System debug mode • VQFN 48 package with heat sink and non-protruding leads -  - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 33 - driver for backlight LEDs adjustable in steps up to 140mA and with soft turn on and off by PWM - 4 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 34 - Overtemperature Warning - Support of S-GOLD standby power-down concept - Support of S-GOLD Power-Down Pad Tristate Function - 5 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 C233 0.1U 4.7U 100n 2.2U 2.2U 2.2U 2.2U 2.2U 2.2U 2.2U 4.7U 2.2u [Figure3.3.2-1] SM-Power 3 Circuit Diagram - 6 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 36: Charging Control

    IEOC EN_SET RT9524 C256 C255 R207 R206 C257 0.1u 3.3K (10V) (25V) [Figure 3.4-1] Charging IC (RT9524) Circuit - 7 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 3. BB CIRCUIT TECHNICAL BRIEF [Table 3.4-1] PIN description of Charging IC [Figure 3.4-2] Block diagram of Charging IC - 8 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 38: Ower On/Off

    If push the END_KEY button, voltage level of PWRON pin is change from high to low. ON_OFF1 is a power-on input for SM-POWER3 with active low levels. - 9 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 39: Sim Interface

    J301 SIM_RST SIM_CLK SIM_IO GND1 GND4 GND2 GND3 C335 C333 C334 C336 ENSY0025101 100n [Figure 3.6-1] SIM Circuit - 40 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 40: Flash Connector

    R325 MMC_DETECT G5 G3 G1 MMC_CMD R327 MMC_CLK MMC_D[0] G6 G4 G2 S301 R326 [Figure 3.7-1] T-Flash Connector - 41 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 41: Memory

    C129 C112 C132 0.1U 0.01U 0.1U 0.01U 0.1U 0.01U 0.1U 0.01U 0.1U 0.01U [Figure 3.8-1] Memory circuit diagram - 42 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 42: Lcd Display

    TP304 LCD_VSYNC FL303 15pF INOUT_A4 INOUT_B4 GB042-40S-H10-E3000 FL302 15pF Maker Maker ID SHARP TOVIS [Figure3.9-1] LCD circuit diagram - 4 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 43: Lcd Back-Light Illumination

    200mV @ 200mA. Users can easily configure LDO ‘s output via I2C interface control. The LDOs also provides current limiting and over temperature protection (OTP) from 160 to 140 . - 44 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 44: Battery Voltage Monitor

    RF_TEMP R115 390K VDDA_M (1%) R103 R120 100K PAOUT1_1 (1%) PA_LEVEL PAOUT1_2 [Figure3.11-1] Battery voltage monitor circuit diagram - 45 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 45: Audio

    FB211 C270 C269 I2C1_SCL C271 I2C1_SDA 2.2u 0.1u 2.2u R227 EAR_GND [Figure 3.12.1-1] Audio sub system circuit diagram - 46 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 46: Headset Circuit

    R237 C288 HS_MIC_N C283 2.2K FB205 C289 HS_MIC_P C284 1800 C290 VMIC_GND EAR_GND [Figure 3.12.2-1] Headset circuit diagram - 47 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 47: Wlan/Bluetooth/Fm (Lbeh19Unbc)

    It is the one antenna structure which is supported of WLAN/Bluetooth in 2.4GHzand. [Figure 3.13-1] WLAN/Bluetooth System Architecture - 48 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 48 I2S and PCM interfaces. [Figure3.14.3] shows the FM Radio system architecture in the T325. - 49 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49 L402 4.7u 2V7_VBT C430 C433 C431 C432 0.1u 4.7u 2.2u [Figure 3.13-3] FM radio & Bluetooth circuit diagram - 50 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 50: Camera Interface ( Pmb8878 )

    Configuration of the CIF is performed by register read and write transactions using the AHB slave interface. [Figure 3.14-1] Block diagram of Camera Interface - 51 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 51 – provides YCbCr 4:2:2 to 4:2:0 conversion by programming different scale factors for luminance and chrominance data – continuous resize support - 52 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 52 • Asynchronous reset inputs • Debug features – OCDS mode – AHB integration test support – sensor interface observation register - 5 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 53: 5Pin Interface Connector

    USB/ Remote control Key ADC/ Headset left sound USW_DP USB/ Remote control interrupt/ Headset Right sound USW_ID 5~15 Power GND - 54 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 54: Rf Circuit Technical Brief

    TX gain control [Figure 4.1-1] Block Diagram of RF part - 55 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes Copyright 2008 LG Electronics. Inc. All right reserved.
  • Page 55 VCO_RC SMARTi3GE_SiP_Blockdiagram.emf Figure 2 Functional Block Diagram [Figure 4.1-2] RF Functional Block Diagram Product Specification Revision 1.0, 2007-02-21 - 56 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 56 MMC_D[0] MMCI2_DAT0 MMC_CLK MMCI2_CLK VDDP_MEM_ETM USB_OEN IRDA_TX VDDP_DIGE AB19 MUIC_INT IRDA_RX Figure 4.1-3] Schematic of RF Control Signals - 57 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 57: Gsm Part

    (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. - 58 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 58: Gsm Transmitter

    The output of the amplitude modulator is connected to a single ended output RF PGA for digitally setting the wanted transmit power. - 59 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 59: Reference Oscillator

    Implemented in the SMARTi 3GE are two outputs for direct control of GSM front end modules with two logic input pins to select RX- and TX-mode as well as low- and highband operation. - 60 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 60 GPIO16 ANT_SEL5 GPIO17 ANT_SEL6 GPIO18 GPIO19 [Figure 4.2.5-2] T320 Front End Control (Control signal from Baseband IC) T325 - 61 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 61: Wcdma Part

    • allpass filter (auto calibrated) • configurable output drivers (programmable DC voltages and driver currents for different load impedances) - 62 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 62 The RF output signal is available at the differential outputs TXOUTH,/TXOUTHX, TXOUTM/TXOUTMX, and TXOUTL/TXOUTLX. The modulator supply voltage must also be applied to these open drain differential outputs. - 6 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 63 The total VCO frequency range is divided in 256 subranges, in order to limit the VCO slope. Before the settling process of the PLL starts, a successive approximation algorithm selects the most appropriate subrange. - 64 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 64: Gsm Power Amplifier Module

    Connect 0.01uF bypass capacitor as close to pin as practical 8, 11, 14 Ground [Table 4.4-1] TQM7M5005H Pin description [Table 4.4-1] TQM7M5005H Pin description - 65 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 65: Wcdma Band1/8 Power Amplifier Module

    2.2p B2/5 ACPM-5225 [SMPY0021801] [Figure 4.5-1] Schematic Diagram of WCDMA Band1/8 PAM (ACPM-5281) [Table 4.5-1] ACPM-5281 Pin description - 66 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 66: Wcdma Band1/8 Low Noise Amplifier

    L513 R504 4.7n 4.7p [Figure 4.6-1] Schematic Diagram of WCDMA Band1/8 LNA (BGA735L16) [Table 4.6-1] BGA735L16 Pin description - 67 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 67: Wcdma Band1 Duplexer

    [Figure 4.7-1] Schematic Diagram of WCDMA Band1 Duplexer [Table 4.7-1] B7697 Pin description - 68 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. opyright 2008 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 68: Wcdma Band8 Duplexer

    GND4 [Figure 4.8-1] Schematic Diagram of WCDMA Band8 Duplexer [Table 4.8-1] B7675 Pin description - 69 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes Copyright 2008 LG Electronics. Inc. All right reserved.

  • Page 69: Trouble Shooting

    -Connect mobile switch cable between Communication test set and DUT when you need to make a phone call. -Follow trouble shooting procedure LG Electronics LGE Property 1/33 - 70 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 70: Power On Trouble

    C531 C532 C570 DSA321SA_26MHZ 0.1u Figure 5-2. PMIC Circuit Figure 5-2. PMIC Circuit - 71 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 2/33...
  • Page 71 Real Time Clock VAFC VAFC 2.65V Not used VVIB 2V8_VVIB 2.8V 140mA Vibrator - 72 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 3/33...
  • Page 72 ( pin of X501) Replace main PCB X401 3pin of X501 Figure 5-5. X-TAL - 7 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 4/33...

  • Page 73: Charging Trouble

    C256 C255 R207 R206 C257 0.1u 3.3K (10V) (25V) Figure 5-6. Charging circuit - 74 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 5/33...
  • Page 74 Battery thermistor Change the Battery value retest is about 10K? Charge is operating properly - 75 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 6/33...

  • Page 75: Lcd Display Trouble

    TP2 Check signal flow via EMI filter Figure 5-11. Charge Pump Figure 5-11. EMI Filter - 76 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. LG Electronics LGE Property Only for training and service purposes 7/33...
  • Page 76 Damaged filter FL301, FL302, FL303 Assemble FL301, FL302, FL303 Figure 5-11. EMI Filter - 77 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 8/33...

  • Page 77: Camera Trouble

    C319 C317 0.1u 0.1u 0.1u Figure 5-12. Camera circuit Figure 4-13. Camera Socket - 78 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 9/33...
  • Page 78 Replace New Camera Replace module Camera socket Working properly? Replace Camera module Assemble - 79 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only LG Electronics LGE Property 10/33 Only for training and service purposes...

  • Page 79: Receiver & Speaker Trouble

    Figure 5-15. Speaker Contact LG Electronics LGE Property 12/33 Figure 5-16. Audio Amp Figure 4-17. Speaker - 80 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 11/33...
  • Page 80 Replace Main Board High(C266,C267) ? Output Signal is Replace Audio High(C703,C704)? AMP(U205). Assemble LG Electronics LGE Property 13/33 - 81 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 81: Microphone Trouble

    Check mic. Bias line (2.5V)when Call Check Signal Replace microphone C295, C296 (MIC201) Assemble - 82 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 14/33...

  • Page 82: Vibrator Trouble

    Figure 5-19. LINEAR MOTOR DRIVER Circuit Check the driver IC(U306) Figure 5-20. Vibrator Driver - 8 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property...
  • Page 83 Check Vibrator soldering Pin1 of Replace Main Board Q302(VIB_PWM) is high? Replace Vibrator Assemble - 84 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 16/33...

  • Page 84: Sim & Usd Trouble

    Pin 6 Pin 1 / SIM_CLK / SIM_IO 2V9_SIM Figure 5-23. SIM CLK - 85 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 16/33...
  • Page 85 G5 G3 G1 MMC_CMD R327 MMC_CLK MMC_D[0] G6 G4 G2 S301 R326 Figure 5-24. uSD - 86 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 18/33...
  • Page 86 TP 2 is 2.9V Signal) Check proper Replace Main Board uSD? Assemble - 87 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only LG Electronics LGE Property 19/33 Only for training and service purposes...

  • Page 87: Touch Trouble

    Check and Replace Touch window window FPCB_ is Crack? Replace window and Assemble - 88 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 20/33...

  • Page 88: Lcd Led Trouble

    ? Check and Replace Check TP2 is charge pump. high? (U301) Assemble - 89 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 20/33...

  • Page 89: Wifi / Bluetooth Trouble

    F_CLK_OUT C422 26M_BT L402 4.7u 2V7_VBT C430 C433 C431 C432 0.1u 4.7u 2.2u [Figure5.12-1] Schematic of WiFi/BT/FM module - 90 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 90 START TP1, 2,  is OK? Check the power block SDIO OK? Module Check UART OK? Board change - 91 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 91 6. You can select wanted test cases after getting an optimized power 7. Blue tooth Off - Menu(OK key) setting 4)Connectivity 1)Bluetooth 1)Turn on/Turn off - 92 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 92: Vt Trouble

    C340 0.1u Figure5.13 Schematic of VT module Figure5-29 Schematic of VT module TP1(CAM_D_1V8) TP1(CAM_A_2V8) TP1(CAM_IO_2V62) TP6(CAM_RESET) TP4(I2C2_SDA) TP5(I2C2_SCL) - 9 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 93 Check soldering or Check TP1,TP2,TP Replace U01 Check Check soldering or TP4,TP5,TP6 Replace U102 Replace Replace Board VT Camera Assemble - 94 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 94: Download

    6. DOWNLOAD 6. DOWNLOAD LG-T25 LG-T25 - 95 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 95 6. DOWNLOAD LG-T25 LG-T25 LG-T25 - 96 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 96 6. DOWNLOAD LG-T25 LG-T25 LG-T25 - 97 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 97 6. DOWNLOAD LG-T25 - 98 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 98 6. DOWNLOAD - 99 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 99 6. DOWNLOAD - 100 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 100 6. DOWNLOAD ‘LG-T25’ - 101 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 101 6. DOWNLOAD - 102 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 102 6. DOWNLOAD - 10 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 103 6. DOWNLOAD LG-T25 ‘LG-T25’ LG-T25 LG-T25 LG-T25 LG-T25 LG-T25 ‘LG-T25’ LG-T25 - 104 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 104 6. DOWNLOAD LG-T25 LG-T25 LG-T25 LG-T25 LG-T25 LG-T25 - 105 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 105 6. DOWNLOAD LG-T25 - 106 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 106 6. DOWNLOAD LG-T25 LG-T25 - 107 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 107: Block Diagram

    I2C2 USB_SELECT USB_SELECT 1V8. 1.2FS 1.2FS 2V62 I2C1 Charge Pump Touch PMIC RT9396 6CH, 4LDO PMB6821 CAMERA 5MP LGE Internal Use Only - 108 - Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 108: Circuit Diagram

    OJ102 R128 R129 BAND 1/8 R128, R129 DNI BAND 1/5 R128 1ohm PLACE BAND 2/5 R129 1ohm PLACE Copyright © 2010 LG Electronics. Inc. All right reserved. - 109 - LGE Internal Use Only Only for training and service purposes...
  • Page 109 1V8_SD EAR_GND R202 FB211 I2C1_SCL C270 C271 C269 Rev 1.0_U204 [EUSY0102803] DNI I2C1_SDA 2.2u 0.1u 2.2u R227 EAR_GND LGE Internal Use Only - 110 - Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 110 SX8650 KEYIN0 I2C2_SCL KEYOUT0 G6 G4 G2 SEND I2C2_SDA KEYOUT1 VOLUME S301 TOUCH_INT NIRQ KEYIN2 R326 C310 0.1u Copyright © 2010 LG Electronics. Inc. All right reserved. - 111 - LGE Internal Use Only Only for training and service purposes...
  • Page 111 (1%) X401 26MHz FM_AUDIO_L R410 FM_AUDIO_R VOUT C437 BT_VCXO_EN XTALP 2V62_VIO 2V62_VIO TG-5010LH-87N R407 C439 C438 C440 100K LGE Internal Use Only - 112 - Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 112 RX SAW : BAND5 B9432 [SFSY0034801] CTRL3 ANT_SEL3 ANT_SEL5 WCDMA_2100 : BAND1 WCDMA_1900 : BAND2 WCDMA_ 850 : BAND5 WCDMA_ 900 : BAND8 Copyright © 2010 LG Electronics. Inc. All right reserved. - 113 - LGE Internal Use Only Only for training and service purposes...
  • Page 113 LGE Internal Use Only - 114 - Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 114: Bga Pin Map

    9. BGA Pin Map 9. BGA Pin Map 9. BGM Pin Map PMB 8878(S-GOLD3H) PMB 8878(S-GOLD3H) : NC Pin - 115 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 115 PMB6821 Pin Configuration (Top View) PMB6821 Pin Configuration (Top View) PMB 6821 Pin Configuration (Top View) : NC Pin - 116 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 116 9. BGA Pin Map H8BCS0SI0BAR H8BCS0SI0BAR *** NC pin is not used ***NC Pin is not used - 117 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 117 - 118 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 118: Pcb Layout

    MIC201 : MAIN MIC R247 C296 - no voice sending R246 C295 R245 R244 C294 - no voice recording C293 LG-T325_MAIN_SPFY0231201-1.1_TOP Copyright © 2010 LG Electronics. Inc. All right reserved. - 119 - LGE Internal Use Only Only for training and service purposes...
  • Page 119 C530 BAT201 - no Service - RF Sensitivity & TX Power L538 C623 L537 GND501 ANT501 GND502 LG-T325_MAIN_SPFY0231201-1.1_BOT LGE Internal Use Only - 120 - Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 120: Rf Calibration

    11.1 Test Equipment Setup 11.2 Calibration Step 11.2.1 Turn on the Phone. 11.2.2 Execute “HK_37.exe” LG Electronics LGE Property 28/33 - 121 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 121 11.2.3 Click “SETTING” Menu T25 11.2.4 Setup “Ezlooks” menu such as the following figure - 122 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 29/33...
  • Page 122 Setup Logic mode 1:Cal, 2:Auto, 3:Cal+Auto PWR: Power Supply Cell: Call Test Equipment - 12 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property 30/33...
  • Page 123 11.2.8 Click “START” for RF calibration T25 Select Model 11.2.9 RF Calibration finishes - 124 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 31/33...
  • Page 124 11. RF CALIBRATION 11.2.10 Calibration data will be saved to the following folder. T25 T25 - 125 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes LG Electronics LGE Property...
  • Page 125 2. Calibration program automatically changes either “normal mode” or “ptest mode”. 3. Phone operation Mode < Normal Mode> <Ptest Mode> - 126 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes LG Electronics LGE Property 33/33...

  • Page 126: Exploded View & Replacement Part List

    CAN,SHIELD SVCY01 Camera Module AKAC00 ABTY00 Battery Assembly MWAC00 MJN00 SAFY00 SBPL00 Mobile Phone Battery Li-Ion ACGM00 ACQ00 Copyright © 2010 LG Electronics. Inc. All right reserved. - 127 - LGE Internal Use Only Only for training and service purposes...
  • Page 127 LGE Internal Use Only - 128 - Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 128: Exploded View & Replacement Part List

    MCQ66468401 COMPLEX LG-T320 PRTTL BK:Black COMPLEX, (empty), , , , , MBFZ00 BRACKET MBFZ0051001 LG-T320 PRTTL TL,SV,PRESS, STS, , , , , MCJK00 COVER,FRONT - MCJK0131701 LG-T320 PRTTL TL,BK,MOLD, PC LUPOY SC-1004A, , , , , MICE00 INSERT,NUT MICE0016907 MECH_COMMON ZY,ZZ,PRESS, STS, , , , , MDAY00 DECO...
  • Page 129 Spec Remark MCJN00 Cover,Rear MCJN0124302 COMPLEX LG-T320 PRTTL TN:TITANIUM - MDAY00 DECO MDAY0077501 LG-T320 PRTTL TL,BK,MOLD, PC LUPOY SC-1004A, , , , , MPBJ00 PAD,MOTOR MPBJ0077101 LG-T320 PRTTL TL,BK,COMPLEX, (empty), , , , , MPBN00 PAD,SPEAKER MPBN0090601 LG-T320 PRTTL TL,BK,COMPLEX, (empty), , , , ,...
  • Page 130 MPBZ0219601 KM500 ROMBB BB,ZZ,COMPLEX, (empty), , 503, 860, 145, MPCY00 PALLET MPCY0013203 KG800 DEUBK BK,BL,COMPLEX MBAD00 BAG,VINYL(PE) MBAD0005204 LG-LX260 SPRAG AG,ZZ,COMPLEX, (empty), , , , , MBEE00 BOX,MASTER MBEE0059801 KS360 ACNRD RD,ZZ,BOX, TW, , 307, 170, 251, 1 COLOR CG300 CGR DG,ZZ,LABEL,MASTER BOX(for CGR TDR 2VER. MLAJ00...
  • Page 131 C623 Capacitor,Ceramic, MCH155A100D 10pF 0.25PF 50V NP0 -55TO+125C 1005 R/TP C283 ECCH0000110 Chip - ROHM Semiconductor KOREA CORPORATION - 12 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 132 1005 R/TP - TDK KOREA COOPERATION C557,C559, C579 Capacitor,Ceramic, C1005JB0J104KT000F 0.1uF 10% 6.3V Y5P -30TO+85C 1005 C263,C264 ECCH0002001 Chip R/TP - TDK CORPORATION - 1 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 133 0603 R/TP - TDK CORPORATION Capacitor,Ceramic, C0603C0G1H820JT00NN 82pF 5% 50V NP0 -55TO+125C 0603 C516 ECCH0009105 Chip R/TP - TDK CORPORATION - 14 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 134 GRM36X7R104K10PT 100nF 10% 10V X7R -55TO+125C 1005 C256,C271, ECZH0003103 Chip R/TP - MURATA MANUFACTURING CO.,LTD. C272,C301, C310,C317, C318,C319, C334,C337, C421,C510 - 15 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 135 SHIELD 1 1.0X0.5X0.5MM R/TP TAIYO YUDEN CO.,LTD 0402CS-5N1XJEW 0402CS-5N1XJLW,5.1 nH,J,1005,R/TP,chip L503,L508 Inductor,Multilayer,Chip ELCH0009110 coil COILCRAFT SINGAPORE PTE LTD. - 16 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 136 LL1005-FHLR10J 100NH 5% 0V 200mA 2.2OHM 870MHZ 10 L103,L104, Inductor,Multilayer,Chip ELCH0001430 NON SHIELD 1 1.0X0.5X0.5MM R/TP TOKO, INC. L514 - 17 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 137 Semiconductor KOREA CORPORATION R116,R326, MCR01MZP5J103 10KOHM 5% 1/16W 1005 R/TP - ROHM R332,R501, Resistor,Chip ERHZ0000405 Semiconductor KOREA CORPORATION R509 - 18 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 138 PMIC RICHTEK TECHNOLOGY CORP. H8BCS0SI0BAR-46M NAND/2G SDRAM/1G 1.7VTO1.9V U103 IC,MCP,NAND EUSY0347506 14.0x10.0x1.2 TR 149P - - - HYNIX SEMICONDUCTOR INC. - 19 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 139 VA206, VA311, EVLC5S02100 5.5V 0% 100F 1.0*0.5*0.6 UL SMD R/TP Varistor SEVY0005202 VA312, AMOTECH CO., LTD. VA313, VA314 - 140 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 140 B9450 942.5MHz 1.4*1.1*0.4 SMD R/TP 5P EPCOS PTE LTD. ACPM-5281-TR1 dBm,%,A,dBc,dB,4x5,SMD,3G Dual PAM U604 IC,Power Amplifier SMPY0020101 B1+8. Coupler Integrated,LGA,R/TP, AVAGO TECHNOLOGIES INTERNATIONAL SALES PTE. LIMITED - 141 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 141 ERHZ0000201 Semiconductor KOREA CORPORATION MCR01MZP5J102 1KOHM 5% 1/16W 1005 R/TP - ROHM R122 Resistor,Chip ERHZ0000404 Semiconductor KOREA CORPORATION - 142 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 142 SPFY0231201 FR-4 - LX-BUMP 8 0.8 T320 ORF,MAIN,1.0,FR- SPFY00 PCB,Main SPFY0231201 4,0.8 mm,LX-BUMP 8,T320 MAIN ISUPETASYS TCM9001MD CMOS,VGA,Toshiba(1/10"),4x4x2.23t,Reflow Type SVCY01 Camera Module SVCY0019901 TOSHIBA - 14 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 143: Accessory

    KCA-ET-8-0020 KCA-ET-8-0020 Micro USB, 1.2M KSD CO., SGDY00 Accessory,Data Cable SGDY0016701 EMB-LGE001STKE ,BLACK,4 POLE PLUG,3.5 SGEY00 Earphone,Stereo SGEY0003219 4,Earphone,Stereo CRESYN CO.,LTD - 144 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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