Page 1 Internal Use Only Service Manual LG-T300 Date: August, 2010 / Issue 1.0...
Page 2: Table Of Contents
4.8 Camera Trouble ................84 4.9 Speaker / Receiver Trouble ............88 4.10 Earphone Trouble ..............91 4.11 Microphone Trouble ..............94 - - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 5 • When returning system boards or parts 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
International Portable User Identity Intermediate Frequency Liquid Crystal Display Low Drop Output Light Emitting Diode OPLL Offset Phase Locked Loop - 7 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 7 Time Division Multiple Access UART Universal Asynchronous Receiver/Transmitter Voltage Controlled Oscillator VCTCXO Voltage Control Temperature Compensated Crystal Oscillator Wireless Application Protocol - 8 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 8: Performance
Internal EAR Phone Jack PC Synchronization Speech coding EFR/FR/HR Data and Fax Vibrator Loud Speaker Voice Recoding Microphone - 9 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 9 MIDI SW MIDI (Mono SPK) Camera 1.3M FF Bluetooth / FM Radio Bluetooth version 2.1 / 76~108MHz supported - 10 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 10: Technical Specification
Power Toler. 30dBm 14dBm 28dBm 12dBm 26dBm 10dBm 24dBm 8dBm 22dBm 6dBm 20dBm 4dBm 18dBm 2dBm 16dBm 0dBm - 11 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 11 6,000 GSM850/ EGSM Offset from Carrier (kHz). Max. dBm Output RF Spectrum (due to switching transient) 1,200 1,800 - 12 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 12 3 dB 11 3 dB Frequency (Hz) Max.(dB) Min.(dB) 1,000 Sending Response 2,000 3,000 3,400 4,000 4 3 dB - 1 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 13 At least 55 dBspl under below conditions: Ringer Volume 1. Ringer set as ringer. 2. Test distance set as 1 m - 14 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 14 Battery full charge voltage = 4.2 V Capacity: 900mAh Switching-mode charger Travel Charger Input: 100 ~ 240V, 50/60 Hz Output: 4.8V, 400mA - 15 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 15: Technical Brief
3.1 Digital Main Processor Figure. 3.1.1 X-Gold tm 213 Hardware Block Diagram Figure. 3.1.1 X-Gold tm 213 Hardware Block Diagram - 16 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 16 – GEA-1/2/3 • Security: – OMTP TR0 – Secure Boot – RSA(ROM)/SHA-1(HW accel.) – OCDS disabling – Certificate Management - 17 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 17: External Memory
• USB2.0 up to 480 Mbit/s (High Speed) w/ external USB Phy over ULPI interface • Stereo Headset (Amplifier integrated) • 3 external analog measurement PIN’s • Bluetooth - 18 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 18 • USB battery charging – USB charging spec 1.0 compliant • Backlight – Up to 4 serial white LEDs (integrated LDO) - 19 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 19: Main Lcd Display
– 64 voices MIDI, SP-MIDI – FM synthesizer • AMR-WB • True ring tones (MP3) • MP3, eAAC+ • G.722 SB-ADPCM encoding/decoding - 20 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 20: Power Management
100mA. That is the load current estimated for the GSM talk mode. - 21 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 21 The RF module has implemented several LDO’s for different RF Power domain. The mixed signal module has some LDO’s for the audio driver and microphone supply. - 22 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 22 3. TECHNICAL BRIEF 3. TECHNICAL BRIEF Table. 3-2-1 Power supply Domains (without RF) - 2 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 23 This is handled by an ADC control block in one of the state-machines. If the charger unit is running the ADC is controlled by the charger state-machine - 24 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 24 3. TECHNICAL BRIEF Figure.3.2.1 First Part of the State Machine, Running in Different Power Domains than the Second Part - 25 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 25 3. TECHNICAL BRIEF 3. TECHNICAL BRIEF Figure 3.2.2 Second (Main) Part of the Startup State Machine in the VPMU Domain - 26 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 26 This allows to power up the LCORE core regulator and wait for the core to reach reset state before powering up the I/O supply regulators. - 27 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 27 3. TECHNICAL BRIEF 3. TECHNICAL BRIEF Figure 3.2.3 Start Up Sequence (triggered by First Connect Event) - 28 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 28 In testmode signal reset_pmu_n_o is high, that means the chip reset is fully controlled from external - 29 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 29 PMU state-machine is high, vcxo_enable controls the rf_sysclk_en signal to the RF. If rf_sysclk_en_pmu is low, the DXCO is switched off, independent from vcxo_enable. - 0 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 30 That means all PMU register are reset in OFF state. For details about the SW reset see chapter External Reset Handling - 1 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 31 Before switching OFF the software shall have enabled the 32 kHz oscillator and has switched the PMU clock to the 32 kHz clock to archive the target OFF current - 2 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 32: Fem With Integrated Power Amplifier Module
Additionally, a VBATT tracking feature is incorporated to maintain switching performance as supply voltage decreases. - - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 33 HIGH RX3(PCS_RX) HIGH HIGH RX4(DCS_RX) HIGH GSM850/900_TX HIGH HIGH DCS/PCS_TX HIGH HIGH HIGH Figure 3.3.3 FEM CIRCUIT DIAGRAM - 4 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 34: Crystal(26 Mhz, X100)
This predistortion is performed by the linearization unit for crystal oscillator (LUXO). The LUXO calculates the corresponding DIG value according to the given AFC value. - 5 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 35: Rf Subsystem Of Pmb8810 (U102)
The system can be configured to support one low band, GSM850 or EGSM900, and one high band, DCS1800 or PCS1900. A block diagram of the RF subsystem is given in Figure 3-4-1. - 6 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 36 DC offset removal and programmable gain control. Figure. 3.5.2 RECEIVER CHAIN BLOCK DIAGRAM - 7 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 37 The 26 MHz reference signal of the phase detector incorporated in the PLL is provided by the reference oscillator. - 8 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 38 A minor set of power amplifiers require a bias voltage to enhance power efficiency. Support of this power amplifiers is achieved by the implemented bias DAC. Figure. 3.5.4 PA AND FEM CONTROL BLOCK DIAGRAM - 9 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 39: Power Supply
One embedded direct-to-battery LDO provides the 2.5 V supply voltage for the remaining circuits. Figure. 3.5.5 POWER SUPPLY BLOCK DIAGRAM - 40 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 40: Memory(Pf8F5066M0YDe, U101 )
(legacy-latching) on some litho/density combinations and up to 133 MHz using CLK address-latching only on some litho/density combinations. It is listed below in the following table. - 41 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 41 • Deep Power-Down (DPD) mode: DPD provides the lowest power consumption and is enabled by programming in the Enhanced Configuration Register. DPD is initiatied by asserting the DPD pin. - 42 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 42: Bt Module
Radio Specification and enhanced data rate specification and meets or exceed the requirement to provide the highest communication link quality of service. - 4 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 43: Receiver Path
Bluetooth function is integrated close to the celluar transmitter, minimal external filtering is required to eliminate the desensitization of the receiver by the cellular transmit signal. - 44 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 44: Sim Card Interface
This signal makes SIM card to HW default status. SIM_CLK This signal is transferred to SIM card. SIM_DATA This signal is interface datum. - 45 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 45: Lcd Interface
ZD301 Figure 3-9-1. LCD Interface of LCD FPCB The LH240Q40-SD14 model is a Color TFT (Main) LCD supplied by LG Display. This main LCD has a 2.4 inch diagonally measured active display area with 240x(RGB)x320 resolution. Each pixel is divided into Red, Green and Blue sub-pixels and dots which are arranged in vertical stripes.
Page 46 Users can easily configure LDO output voltage via the I2C interface control. The LDOs also provide current limiting and over-temperature functions. The RT9396 is available in a WQFN-24L 3x3 package. - 47 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 47 4.0mA or less. This feature results in higher efficiency under light-load conditions. Further reduction in quiescent current will result from using fewer than four LEDs. - 48 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 48: Battery Charger Interface
90mA or 400mA through one wire interface. The RT9524 is available in the tiny 10pin 2mm by 3mm TDFN package. - 49 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 49: Keypad Interface
(or key combination) that was pressed and how long it was pressed. - 50 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 50 3. TECHNICAL BRIEF 3. TECHNICAL BRIEF Figure 3-11-3 Block Diagram and System Integration of the KPD - 51 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 51: Audio Interface
• Analog part The following figure shows an architecture overview of the Audio section. Figure 3.12.1 Audio Section Overview - 52 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 52 100% by Firmware. • The high-pass functions of the voiceband filters have to be implemented in firmware on TEAKLite®. - 5 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 53 Loudspeaker driver, b) one mono, differential Earpiece driver and c) one stereo, single-ended (with uni- or bipolar signals), Headset driver. - 54 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 54 The buffers are designed to be short circuit protected. Figure 3.12.3 Switching for R/L DACs onto Buffers - 55 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 55 To improve SNR the sample frequency can be doubled in dedicated modes and the modulated data stream is 4MHz instead of 2 MHz. - 56 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 56 In case of an digital microphone VMIC can be used for supplying this microphone. Figure 3.12.5 Typical Microphone Supply Generation (alternative) - 57 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 57: Camera Interface(2M Fixed Focus Camera)
Programming is done by register read/write transactions using an AHB slave interface. Figure 3.13.1 Block Diagram of Camera Interface - 58 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 58 • Color processing (contrast, saturation, brightness, hue) • Power management by software controlled clock disabling of currently not needed sub-modules - 59 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 59: Touch Interface
X-position, Y- position and Zposition of ADC conversion per serial interface write and read commands after finishing the all of ADC conversion. - 60 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 60: Vibrator Interface
These features fast turn on time, and a wide input voltage range for precise speed control. A low power shutdown mode minimizes power consumption. Figure 3-15-1 Vibrator Driver Block Diagram - 61 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 61 VIB_EN PGND C314 GAIN C339 R310 0.1u C310 R332 R333 100K 100K Figure 3-15-2 Touch &Vibrator Driver Block - 62 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 62: Trouble Shooting
Main Chip (A-GOLDRADIO) U102 PMB8810(XMM213) GPRS QUAD TX MODULE U401 RF7161 Crystal, 26MHz Clock X101 DSX321G-26M(8PF) RF Switch SW401 KMS-518 - 6 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 63: Rx Trouble
Crystal Circuit (2) Check Mobile SW &TX module (3) Check PLL Control Re-download SW or Do calibration again - 64 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 64 USIF1_TXD_MTSR UART_RX USIF1_RXD_MRST X101 DSX321G-26M BT_RXD USIF1_RTS_N BT_TXD USIF1_CTS_N USB_DP DPLUS 26MHz USB_DM DMINUS Figure 4.2.2 Figure 4.2.3 - 65 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 65 C418 IN_881_5 OUT_881_5 L407 C427 EGSM L410 IN_942_5 OUT_942_5 RX12 GND1 GND2 GND3 GND4 L406 GND5 GND6 869M894M,925M960MHz - 66 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 66 TP3(Low Band) Replace TX Module(U401) Signal is OK ? EGSM Rx Mobile SW & TX Module is OK. - 67 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 67: Tx Trouble
(1)Check Crystal Circuit (2) Check Mobile SW &FEM (3) Check PLL Control Redownload SW or Do calibration again - 68 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 68 USIF1_TXD_MTSR UART_RX USIF1_RXD_MRST X101 DSX321G-26M BT_RXD USIF1_RTS_N BT_TXD USIF1_CTS_N USB_DP DPLUS 26MHz USB_DM DMINUS Figure 4.3.2 Figure 4.3.3 - 69 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 69 C418 IN_881_5 OUT_881_5 L407 C427 EGSM L410 IN_942_5 OUT_942_5 RX12 GND1 GND2 GND3 GND4 L406 GND5 GND6 869M894M,925M960MHz - 70 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 70 Replace TX Module (U401) TP5 signal same Replace SW401 as TP1? EGSM Tx Mobile SW & TX Module is OK. - 71 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 71: Power On Trouble
4.4 Power On Trouble TEST POINT VCORE VMMC VAUX VDDTDC VDDXO U102 VPMU VDDMS VDD_VRF2 VDDTRX VRF1 Figure 4.1 - 72 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 72 LCD_ID BAT_TEMP AD00 A_D0 AD01 A_D1 Figure 4.2 Power block of LG-T300 Figure 4.2 power block of T300 - 7 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 73 Is the phone power on? Re-download software Does it work properly? The phone will Replace the main board Properly operating. - 74 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 74: Charging Trouble
CHGSB LDO_OUT GND2 CHG_EN IEOC EN_SET C206 R209 C201 R204 C207 1.2K 3.9K C205 0.1u 0.1u (10V) (25V) - 75 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 75 Pin 1 of Charging IC(TP01) = 5.1V ? Change the TA Battery is charged? Replace the main board Charging is properly operating - 76 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 76: Vibrator Trouble
4. TROUBLE SHOOTING 4. TROUBLE SHOOTING 4.6 Vibrator Trouble TEST POINT Vibrator PAD / VB301 TP307 U301 Figure 4.6 - 77 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 77 TP307 VIB_PWM PWM/CLK TP07 VB301 VIB_EN PGND C314 GAIN C339 R310 0.1u TP307 C310 R332 R333 100K 100K - 78 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 78 Is PWM Signal OK? Is the voltage at VB301 Replace U302 (+) high? Replace vibrator Vibrator Working well ! - 79 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 79: Lcd Trouble
MLED1~5 (TP01~05) TP07 : LCD_BL_Ctrl 1 2 3 4 5 TP06 : LCD_nRESET U302 LCD FPCB Figure 4.7 - 80 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 80 C318 C321 C322 C320 C319 2.2u 2.2u 2.2u 2.2u I2C_SCL I2C_SDA LCD_BL_CTRL TP07 LED_PWM C316 R313 0.1u 100K - 81 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 81 4. TROUBLE SHOOTING Waveform LCD_BL_CTRL Graph 4.7.1. LCD Backlight Control Signal Waveform LCD_RS LCD_CS LCD_WR Graph 4.7.2. LCD Data Waveform - 82 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 82 Resoldering EMI filter. EMI filter ?(FL301, (FL301,FL302,FL303) FL302,TP302~TP304) Does LCD work Replace LCD module properly ? LCD working well ! - 8 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 83: Camera Trouble
C320 : CAM D 1V5 C318 : CAM IO 1V8 TP03 : U101 R122 TP04 : R123 Figure 4.8 - 84 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 84 2.2u 2.2u 2.2u 2.2u I2C_SCL TP04 TP0 I2C_SDA I2C_SDA LCD_BL_CTRL I2C_SCL LED_PWM C316 R313 0.1u 100K TP04 TP03 - 85 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 85 Graph 4.8.2. MCLK Waveform CAM_HSYNC CAM_VSYNC CAM_PCLK CAM_HSYNC 48MHz Graph 4.8.3.CAM_VSYNC vs. Graph 4.8.4.CAM_HSYNC vs. CAM_HSYNC Waveform CAM_PCLK Waveform - 86 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 86 Data pins on CN302 ? Does Camera work Replace U100 or Change the board properly ? Camera working well ! - 87 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 87: Speaker / Receiver Trouble
Speaker contact TP04 : C228 TP03 : U203 C229 audio TP05 : U102 BB FB206 chip TP06: FB207 - 88 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 88 TP04 CPVSS R225 R224 C234 2.2u 1V8_VDD C242 I2C_SCL 2.2u I2C_SDA R233 C243 C241 0.1u 2.2u R223 EAR_GND - 89 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 89 Check the Audio signal Check the Audio signal Replace/Change the U203 FB206,FB207 FB206,FB207 (TP05,06) (TP05,06) Speaker Speaker Working well!! Working well!! - 90 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 90: Earphone Trouble
TP01 : C231 U203 audio FB303 Headset MIC Resoldering points Headset Earphone check points . . . TP03 TP04 - 91 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 91 120pF VHSMIC C304 560pF R301 0.022uF C312 HS_MIC_N 2.2Kohms C306 10pF C302 0.022uF HS_MIC_P C303 C305 2.2uF 560pF - 92 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 92 Or change the voice from and try again the earphone? U203(amp),U102(BB IC) the earphone? Earphone will work properly - 9 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 93: Microphone Trouble
2.2K VUMIC VA203 VA204 C107 C131 C116 C114 C112 C113 TP03 PLACE THESE CAPS NEAR BB IC U102 - 94 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 94: Only For Training And Service Purposes
Is it a few tens mV AC? Check the soldering of Re-solder component C224, C219 (TP02,03) Microphone will work properly. - 95 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 95: Sim Card Interface Trouble
TP01 uSD_D1 MMCI_DAT_1 uSD_D2 MMCI_DAT_2 uSD_D3 MMCI_DAT_3 ZD200ZD201 is DNI defaultly These are added for CMCC ESD test - 96 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 96 Does it work Does it work Properly? Properly? SIM card is SIM card is properly working properly working. - 97 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 97: Micro Sd (Usd) Trouble
TP03 : R201 R222 : uSD_D3 TP01 : C249 R222 : uSD_D2 TP02 : R231 U102 S201 Figure 4.14 - 98 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 98 DUMMY2 uSD_D2 DAT2 uSD_DET DETECT_A 1V8_VDD DETECT_B TP01 DUMMY3 TP01 C226 C249 TP02 2.2u TP02 R231 100K C250 - 99 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 99 Check out MC_CLK(TP03) & Re-download SW Data(D0~D3) Timing Replace Micro SD Card Micro SD Card will work properly - 100 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 100: Bluetooth Trouble
4. TROUBLE SHOOTING 4.14 Bluetooth Trouble TEST POINT TP1_C443 Ant403 TP2_C444 TP3_C429 TP5_C440 TP6_C432 TP7_C433 TP4_C441 Figure 4.16 CIRCUIT - 101 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 101 TP402 BT_CTS UART_RTS_N TP403 DBB_BT_INT GPIO_0 UART_CTS_N BT_RTS TP404 TP405 GPIO_6 BT_DBB_INT GPIO_1 HUSB_DN FSYS_EN TP406 GPIO_5 HUSB_DP - 102 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 102 VAUX at TP6 U402 1V8_VDD at TP7 CLK32K Replace U402 Replace Check BT_CLK U402 BT will work properly - 10 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 103: Fm Radio Trouble
4. TROUBLE SHOOTING 4.15 FM Radio Trouble TEST POINT CN205 J301 TP5_C247 U203 TP4_C223 TP3_R227 TP2_C325 TP1_L304 Figure 4.17 - 104 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 104 MUIC_ID R230 UART_TX R228 2.2K C225 C227 2.2u AUD1 1.5n C246 2.2u AUD2 ISET TP201 I2C_SCL I2C_SDA MUIC_INT - 105 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 105 VDD_FMR(C123) Check Input & output signal at MUIC Replace U102 A condition is good? FM_radio will work properly - 106 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 106: Touch Trouble
TP08 : TP06 : C341 C343 TP05 : TP07 : C342 C340 U101 TP03 : R122 TP04 : R123 - 107 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 107 TOUCH_INT INTB TP307 VIB_PWM PWM/CLK VB301 VIB_EN PGND C314 GAIN C339 R310 0.1u C310 R332 R333 100K 100K - 108 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 108 Check CN301 and touch pannel touch pannel contact Resolder CN301 or replace touch pannal Touch will work properly - 109 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 118 5. DOWNLOAD LG-T00 ‘LG-T00’ LG-T00 LG-T00 LG-T00 LG-T00 LG-T00 ‘LG-T00’ LG-T00 - 119 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 122: Block Diagram
6. BLOCK DIAGRAM 6. Block Diagram 6. BLOCK DIAGRAM 6.Block Diagram Touch - 12 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 124: Circuit Diagram
1V8_VDD URXD C144 UTXD PWRON I2C_SDA I2C_SCL X102 NX3215SA OJ101 OJ102 OJ103 OJ104 OJ105 OJ107 C108 C120 32.768KHz Copyright © 2010 LG Electronics. Inc. All right reserved. - 125 - LGE Internal Use Only Only for training and service purposes...
Page 125 BAT_TEMP R223 EAR_GND R211 C220 C210 C211 C251 (1%) 100K (5%) 100u 0.1u need to replace to 1% LGE Internal Use Only - 126 - Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 126 C310 MLED1 R332 R333 100K 100K LCD_ID R323 LCD_nRESET CN303 C308 C307 VA306 C309 C338 2.2u 0.1u ZD301 Copyright © 2010 LG Electronics. Inc. All right reserved. - 127 - LGE Internal Use Only Only for training and service purposes...
Page 127 FM Radio(LNA) R406 5.1ohms R407 R408 270ohms C446 R410 C448 FM_ANT Q401 FM_ANT_1 470n 470n C447 R409 4.7K 470n LGE Internal Use Only - 128 - Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 128: Bga Pin Map
8. BGA PIN MAP BGA IC pin check (U101) Ball Diagram (Top View), PMB8810(A-GOLDRADIO+) : not in use - 129 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 129 8. BGA PIN MAP BGA IC pin check (U100) Ball Diagram (Top View), PF38F5060M0Y3DF : not in use - 10 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 130: Pcb Layout
Q401 CN301 C445 FB303 C446 CON301 : Touch screen connector - no touch screen KB203 KB202 KB201 LGT300_MAIN_SPFY0229101-1.2_TOP Copyright © 2010 LG Electronics. Inc. All right reserved. - 131 - LGE Internal Use Only Only for training and service purposes...
Page 131 R206 R207 R202 ANT401 MIC201 : MAIN MIC - no voice sending MIC201 - no voice recording LGT300_MAIN_SPFY0229101-1.2-BOT LGE Internal Use Only - 132 - Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 132: Engineering Mode
[3-6] MemGenConf [6-9] FM Radio [3-7] MemAllUse [6-9-1] FM Radio Test [3-8] MemDetUse [3-9] MemDump [3-10] Change Frequency Band - 1 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 133: Stand Alone Test
2. Check PC Bau Rate 3. Confirm EEPROM & Delta file prefix name 4. Click “Update Info” for communicating Phone and Test-Program - 14 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 134 11. STAND ALONE TEST 10. STAND ALONE TEST Not Connected Connected 4. Click “Update Info” for communicating Phone and Test-Program - 15 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 135 “Reset” bar. 6. Select “Non signaling” in the Quick Bar menu. Then Standalone Test setup is finished. - 16 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 136: Tx Test
3. Select “Tx” in the RF mode menu and “PCL” in the PA Level menu. 4. Finally, Click “Write All” bar and try the efficiency test of Phone. - 17 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 137: Rx Test
4. The Phone must be changed “normal mode” after finishing Test. 5. Change the Phone to “normal mode” and then Click the “Reset” bar. - 18 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 138: Auto Calibration
GuiTk115d.dll ShieldBox_DllD.dll HK_41 Model LG-T300 Spec_LGT300_001 Setup_Cal_Parameter_001 script_001 PwrSupply_Cmd Procedure_LGT300_001 Ezlooks AutoSetup_LGT300_001 xmm2130_eep008.cfg LG_RfTest_E5515C_122.dll LG_RfCal_InfiKE000Ag_177.dll dwdio.dll LG_UI_Ad6500_004.dll Multi_HK - 19 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 139: Description Of Basic File
-. Script_015.xml : RF TEST Setup & calibration Setup Module. -. Spec_LGT300_001.xml : Definition Module of Auto Test Spec -. Setup_Cal_Parameter_001.xml : Calibration Definition Module. - 140 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 140: Procedure
6. Connect as Fig 11-2 (RS232 serial cable is connected between COM port of PC, in general.) 7. . Run HK_40exe to start calibration. 8. Click “ Logic Operation” of “SETTING” menu bar - 141 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 141 10. Select “ LOGIC MODE” that you want Logic mode: 1-> Calibration only 2-> Auto test only 3-> Cal & Auto - 142 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 142 12.AUTO CALIBRATION 11. AUTO CALIBRATION 11. Select the model name “LG-T300” Model name Start button 12. Click “start” button - 14 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 143: Agc
Channel PCS 1900 Frequency 1850.2 MHz 1880 MHz 1909.8 MHz Max power 30 dBm 30 dBm 30 dBm - 144 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 144: Exploded View & Replacement
SPKY00 SAFY00 SVLM00 MWAC00 SUSY00 MPBU00 ACKA00 ACGK00 SUMY00 ACFA00 MTAD00 ADCA00 AKAC00 ACGA00 SBPL00 ACGM00 GMEY00 SNGF00 Copyright © 2010 LG Electronics. Inc. All right reserved. - 145 - LGE Internal Use Only Only for training and service purposes...
Page 146: 1.2 Replacement Parts
PRINTING, (empty), , , , , COLOR TITANIUM APEY PHONE APEY0917023 SILVE TITANIUM ACGY COVER ASSY,EMS ACGY0010905 SILVE - 147 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 147 PRESS, STS, , , , , COLOR WITHOUT MLAA00 LABEL,APPROVAL MLAA0062303 COMPLEX, (empty), , , , , COLOR - 148 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 148: Main Component
ECCH0000122 47 pF,50V,J,NP0,TC,1005,R/TP C114 CAP,CERAMIC,CHIP ECCH0000122 47 pF,50V,J,NP0,TC,1005,R/TP C115 CAP,CHIP,MAKER ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP - 149 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 149 ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP C206 CAP,CHIP,MAKER ECZH0001215 1 uF,10V ,K ,X5R ,TC ,1005 ,R/TP - 150 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 150 ECZH0001215 1 uF,10V ,K ,X5R ,TC ,1005 ,R/TP C240 CAP,CHIP,MAKER ECZH0001215 1 uF,10V ,K ,X5R ,TC ,1005 ,R/TP - 151 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 151 2.2 uF,10V ,M ,X5R ,HD ,1005 ,R/TP ,; , ,[empty] ,[empty] C319 CAP,CERAMIC,CHIP ECCH0007804 ,[empty] ,[empty] ,[empty] ,[empty] ,0.5 mm - 152 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 152 ECZH0000830 33 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP C418 CAP,CHIP,MAKER ECZH0000830 33 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP - 15 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 153 FB201 FILTER,BEAD,CHIP SFBH0000912 1000 ohm,1005 , FB204 FILTER,BEAD,CHIP SFBH0008105 1800 ohm,1005 ,Chip bead ,; ,1800ohm ,; ,[empty] ,R/TP - 154 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 154 22 pF,50V,J,NP0,TC,1005,R/TP L407 INDUCTOR,CHIP ELCH0003819 12 nH,J ,1005 ,R/TP , L408 INDUCTOR,CHIP ELCH0001412 1.8 nH,S ,1005 ,R/TP ,PBFREE - 155 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 155 6800 ohm,1/16W ,J ,1005 ,R/TP R201 RES,CHIP,MAKER ERHZ0000457 30 ohm,1/16W ,J ,1005 ,R/TP R202 RES,CHIP,MAKER ERHZ0000443 2200 ohm,1/16W ,J ,1005 ,R/TP - 156 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 156 220 ohm,1005 ,DCR : 0.35 , Rated current : R233 FILTER,BEAD,CHIP SFBH0009601 500mA,PBFREE R237 RES,CHIP,MAKER ERHZ0000505 680 ohm,1/16W ,J ,1005 ,R/TP - 157 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 157 15K ohm,1/16W,F,1005,R/TP R403 INDUCTOR,CHIP ELCH0001039 2.7 nH,S ,1005 ,R/TP ,PBFREE S201 CONN,SOCKET ENSY0023501 8 ,ETC ,15.1X14.0X1.78t ,0.9 mm,Reverse,Detect - 158 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 158 VMN2 ,5 V,10 W,R/TP ,1.0*0.6*0.4 ,; , ,7.82V , , ,100mW ZD206 DIODE,TVS EDTY0009401 ,[empty] ,[empty] ,2P ,1 - 159 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 159 24 Kohm,1/16W ,J ,1005 ,R/TP R408 RES,CHIP,MAKER ERHZ0000531 270 ohm,1/16W ,J ,1005 ,R/TP R409 RES,CHIP,MAKER ERHZ0000485 4700 ohm,1/16W ,J ,1005 ,R/TP - 160 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 160 VMN2 ,5 V,10 W,R/TP ,1.0*0.6*0.4 ,; , ,7.82V , , ,100mW ZD302 DIODE,TVS EDTY0009401 ,[empty] ,[empty] ,2P ,1 - 161 - Copyright © 2010 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 161: Accessory
LG-T300 ORU(TR1-1HL/Buyer WITHOUT APAY00 PACKAGE APAY0150802 UB/UL_2ea/ML,PL_70ea/Bag_2ea/Angle/500ea) COLOR Without APLY00 PALLET ASSY APLY0003204 TDR TR1-1 ORU Palletizing Color - 162 - LGE Internal Use Only Copyright © 2010 LG Electronics. Inc. All right reserved. Only for training and service purposes...

LG -T300 Service Manual

1 Introduction

2 Performance

3 Technical Brief

4 Trouble Shooting

5 Download

6 Block Diagram

7 Circuit Diagram

8 Bga Pin Map

9 Pcb Layout

10 Engineering Mode

11 Stand Alone Test

12 Auto Calibration

Exploded View & Replacement

Part List

Quick Links

Related Manuals for LG LG-T300

Summary of Contents for LG LG-T300

Table of Contents