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LG GD910 Service Manual
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LG GD910 Service Manual

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Internal Use Only
Service Manual
GD910
Date: July, 2009 / Issue 1.0

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Summary of Contents for LG GD910

  • Page 1 Internal Use Only Service Manual GD910 Date: July, 2009 / Issue 1.0...

  • Page 2: Table Of Contents

    5.4 USB Trouble ..............70 5.5 SIM Detect Trouble ............72 5.6 Side Key Trouble ............75 5.7 Audio Trouble ............76 Copyright © 2009 LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...
  • Page 3 LGE Internal Use Only - 4 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 4: Introduction

    A local telephone company may make changes in its communications facilities or procedure. If these changes could reasonably be expected to affect the use of the GD910 or compatibility with the net work, the telephone company is required to give advanced written notice to the user, allowing the user to take appropriate steps to maintain telephone service.
  • Page 5 The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly different. G. Interference and Attenuation GD910 may interfere with sensitive laboratory equipment, medical equipment, etc. Interference from unsuppressed engines or electric motors may cause problems. H. Electrostatic Sensitive Devices...

  • Page 6: Abbreviations

    Power Amplifier Module ◆ PCB Printed Circuit Board ◆ PGA Programmable Gain Amplifier ◆ PLL Phase Locked Loop Copyright © 2009 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 ◆ VCTCXO Voltage Control Temperature Compensated Crystal Oscillator ◆ Wireless Application Protocol ◆ 8PSK 8 Phase Shift Keying LGE Internal Use Only - 8 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 8: Performance

    > 170 hours @DRX=7 Talk time >110 mins @ Tx level 5 WCDMA >127 mins @Tx=12dBm WCDMA(VT) >50 mins @Tx=12dBm Copyright © 2009 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 V2.1 with A2DP Voice Recording Speaker Phone mode Support Travel Adapter CDROM Stereo Headset Data Cable T-Flash Not Equipped LGE Internal Use Only - 10 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 10: Hw Spec

    ± 800kHz, ± 1600kHz : -98dBm/-96dBm (2.439%) channels AM Suppression GSM : -31dBm - DCS : - -98dBm/-96dBm (2.439%) 29dBm Timing Advance ± 0.5T Copyright © 2009 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 < 17.5 %, when Pout ≥ -20 dBm Peak Code Domain Error < -15 dB at Pout -20 dBm LGE Internal Use Only - 12 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 12 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 Copyright © 2009 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 > 33 dB @ ±5 MHz Leakage > 43 dB @ ±10 MHz Power Ratio (ACLR) Error Vector Magnitude 3GPP Not Complete LGE Internal Use Only - 14 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 14 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 Copyright © 2009 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...

  • Page 15: Bb Circuit Technical Brief

    GD910 service manual 3. BB Circuit Technical brief 3.1 Functional Block Diagram GSM900/1800/1900 UMTS Band1(WCDMA2100) [Figure 3.1] Functional Block Diagram LGE Internal Use Only - 16 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 16: Baseband Processor Introduction

    3. BB Circuit Technical brief GD910 service manual 3.2 Baseband Processor Introduction [Figure 3.2] Top level block diagram of S-GOLD®3H(PMB8878) Copyright © 2009 LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 - 48k x 16bit Data XRAM - 5k x 16bit Data YRAM - Incremental Redundancy(IR) Memory of 35904 words of 16bit LGE Internal Use Only - 18 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 18 - GMSK / 8-PSK Modulator according to GSM-standard 05.04 (5/2000) · GMSK Modulator: gauss-filter with B*T=0.3 · EDGE Modulator: 8PSK-modulation with linearized GMSK-Pulse-Filter Copyright © 2009 LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
  • Page 19 - A real time clock with alarm functions - 2 capture/compare units with 16 channels. One channel active during sleep mode. LGE Internal Use Only - 20 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 20 T_OUT3 T_OUT4 FEM control T_OUT5 FEM control T_OUT6 PA_MODE PAM Mode select T_OUT7 ANT_SEL2 T_OUT8 ANT_SEL3 T_OUT9 T_OUT10 Copyright © 2009 LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...
  • Page 21 RF block temperature measure REMOTE_ADC JACK_TYPE Accessory type detect LCD_ID H/W VERSION H/W version detect VBAT Battery supply voltage measure LGE Internal Use Only - 22 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 22 GD910 service manual GD910 service manual 3.2.5 GPIO map Over a hundred allowable resources, GD910 is using as follows except dedicated to SIM and Memory. GD910 GPIO(General Purpose Input/Output) Map, describing application, I/O state, and enable level, is shown in below table [Table 3.2.5-1] S-Gold®3H GPIO pin Map...
  • Page 23 _DIF_RESET DIF_RESET1 A_RESET DIF_RESET2 I2C1_SCL I2C1_SCL For PMIC & AUDIO DAC I2C1_SDA I2C1_SDA For PMIC & AUDIO DAC LGE Internal Use Only - 24 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 24 For Bluetooth I2S1_TX I2S1_WA0 BT_PCM_SYNC For Bluetooth Audio I/F EPN1 SPK_OUT_N For Speaker EPP1 SPK_OUT_P For Speaker EPPA1 Copyright © 2009 LG Electronics. Inc. All right reserved. - 25 - LGE Internal Use Only Only for training and service purposes...
  • Page 25 JTAG0_TMS JTAG0_TCK JTAG0_TRST_n JTAG0_RTCK JTAG1_TDO JTAG1_TDI JTAG1_TMS JTAG1_rTCK JTAG0_TRST_n ETM I/F TRIG_IN MON1 MON1 MON2 MON2 TRACESYNC TRACECLK LGE Internal Use Only - 26 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 26 MEM _BC2_n MEM _BC3_n UDQS MEM _A[0] SD-DATA(0) SDRAM DATA MEM _A[1] SD-DATA(1) MEM _A[2] SD-DATA(2) MEM _A[3] SD-DATA(3) Copyright © 2009 LG Electronics. Inc. All right reserved. - 27 - LGE Internal Use Only Only for training and service purposes...
  • Page 27 MEM _SDCLK0 SDCLKO For Burst mode MEM _BFCLK01 BFCLKO For Burst mode MEM _BFCLK02 SDCLKI For Burst mode LGE Internal Use Only - 28 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 28 26MHZ 26M Main Clock F32K to 32k crystal OSC32K to 32k crystal RESET_n _RESET TRIG_OUT TRIG_OUT RTC_OUT RTC_OUT Copyright © 2009 LG Electronics. Inc. All right reserved. - 29 - LGE Internal Use Only Only for training and service purposes...

  • Page 29: Power Management Ic

    • Backlight LEDs driver with current selection and PWM dimming function • Two single LED driver outputs for signaling LGE Internal Use Only - 30 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 30 - Top-off charge current sensing SM-POWER completes the USB interface of S-GOLD - Regulated voltage for S-GOLD USB interface including reverse current and overvoltage protection - Switch to supply USB pull-up resistor Copyright © 2009 LG Electronics. Inc. All right reserved. - 31 - LGE Internal Use Only...
  • Page 31 - Overtemperature Warning - Support of S-GOLD standby power-down concept - Support of S-GOLD Power-Down Pad Tristate Function LGE Internal Use Only - 32 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 32 VRTC SU1_GATE SU1_GND VDDUMTS SU1_FB VUMTS SU1_ISENSE VDDSD1 VDDSD2 SD1_FB SD2_FB SD1_FBL SD2_FBL [Figure3.3.1-1] SM-Power 3 Circuit Diagram Copyright © 2009 LG Electronics. Inc. All right reserved. - 33 - LGE Internal Use Only Only for training and service purposes...
  • Page 33 3. BB Circuit Technical brief GD910 service manual 3.3.2 Charging control - GD910 uses external charging IC which is ISL9221 Charging method : CC-CV Charger output voltage : 5.1 V Charging time : 2h 30m Charging current : 379 mA CV voltage : 4.2 V...
  • Page 34 3. BB Circuit Technical brief GD910 service manual [Table 3.3.2-1] PIN description of Charging IC [Figure 3.3.2-1] Block diagram of Charging IC Copyright © 2009 LG Electronics. Inc. All right reserved. - 35 - LGE Internal Use Only Only for training and service purposes...
  • Page 35 3. BB Circuit Technical brief GD910 service manual [Figure 3.3.2-2] Charging Profile LGE Internal Use Only - 36 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 36: Power On/Off

    If push the END_KEY button, voltage level of PWRON pin is changed from high to low. ON_OFF1 is a power-on input for SM-POWER3 with active low edge. ON_OFF2 is for power off alarm clock. Copyright © 2009 LG Electronics. Inc. All right reserved. - 37 - LGE Internal Use Only...

  • Page 37: Sim Interface

    3. BB Circuit Technical brief GD910 service manual 3.5 SIM Interface GD910 supports 1.8V & 2.9V plug in SIM. SIM_IO, SIM_CLK, SIM_RST ports are used to communicate with S- Gold3H and the SIM power supply enabled by PMIC. SIM Interface...

  • Page 38: Memory

    GD910 service manual 3.6 Memory 2Gbit NAND Flash & 1Gbit DDR SDRAM employed on GD910 with 16 bit parallel data bus thru ADD(0) ~ ADD(24). The 1Gbit Nand Flash memory with DDR SDRAM stacked device family offers multiple high- performance solutions.

  • Page 39: Lcd Display

    C258 C11- C262 C21+ AVDD C263 C266 C21- C268 C22+ C269 C267 C22- [Figure3.7-1] LCD connector circuit diagram LGE Internal Use Only - 40 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 40: Lcd Back-Light Illumination

    I2C1_SDA VREF GPO1 GPO2 GPO3 LMON LDOUT1 LDOUT2 C255 C256 C478 Figure 3.8-1] LCD charge pump circuit diagram Copyright © 2009 LG Electronics. Inc. All right reserved. - 41 - LGE Internal Use Only Only for training and service purposes...

  • Page 41: Battery Voltage Monitor

    100K PA_LEVEL PAOUT1 2G_IP BB_I 2G_IN BB_IX 2G_QP BB_Q 2G_QN BB_QX AC20 [Figure3.9-1] Battery voltage monitor circuit diagram LGE Internal Use Only - 42 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 42: Audio

    3. BB Circuit Technical brief GD910 service manual 3.10 Audio 3.10.1 Audio amplifier GD910 use an external audio amplifier for speaker. TPA2005D1 is 1.1W speaker amplifiers with supporting differential input and direct drive . AUDIO AMP VBAT U202 C251 TPA2005D1ZQYR...

  • Page 43: Pin Interface Connector

    GD910 service ma GD910 service manual 3.11 5 PIN Interface connector VCHG Multiport1 Multiport2 VBUS [Table 3.11-1] PIN assign LGE Internal Use Only - 44 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 44: Rf Circuit Technical Brief

    PA_EN PA_EN PA_EN PA_MODE PA_MODE PA_MODE PA_MODE PA_MODE PA_MODE PA_MODE PA_MODE [Figure 4.1-1] Block Diagram of RF part Copyright © 2009 LG Electronics. Inc. All right reserved. - 45 - LGE Internal Use Only Only for training and service purposes...
  • Page 45 To avoid interference between the 2.5G and 3G transceivers, simultaneous operation of SMARTiPM and SMARTi3G is not permitted. LGE Internal Use Only - 46 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 46 4. RF Circuit Technical Brief GD910 service manual TX1 900MHz [Figure 4.1-2] RF Functional Block Diagram Copyright © 2009 LG Electronics. Inc. All right reserved. - 47 - LGE Internal Use Only Only for training and service purposes...
  • Page 47 NC7SZ74L8X MMCI1_CLK MMCI1_DAT1 MMCI1_DAT2 MMCI1_DAT3 AB21 MMCI2_CMD AA20 USB_EN MMCI2_DAT0 MMCI2_CLK Figure 4.1-3] Schematic of RF Control Signals LGE Internal Use Only - 48 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 48: Gsm Part

    Furthermore an automatic DC-offset compensation can be used (depending on the gain setting) to reduce the DC-offset at baseband-output. A programmable gain correction can be applied to correct for front end- and receiver gain tolerances. Copyright © 2009 LG Electronics. Inc. All right reserved. - 49 - LGE Internal Use Only...
  • Page 49 PGA’s as described above. LGE Internal Use Only - 50 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 50 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. Copyright © 2009 LG Electronics. Inc. All right reserved. - 51 -...
  • Page 51 GPIO16 ANT_SEL4 GPIO17 ANT_SEL5 ANT_SEL6 GPIO18 GPIO19 [Figure 4.2.5-2] GD910 Front End Control (Control signal from Baseband IC) LGE Internal Use Only - 52 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 52: Wcdma Part

    4. RF Circuit Technical Brief GD910 service manual [Figure 4.2.5-3] GD910 Front End Control Logic Table 4.3 WCDMA Part The single-chip transceiver is designed to fulfill the W-CDMA UTRA FDD system requirements for bands I, II, III, IV, V, VI and IX. It contains all active circuits required to simultaneously modulate an analog W-CDMA I/Q signal to the TX RF frequency and demodulate a RX RF W-CDMA signal to an I/Q baseband signal.
  • Page 53 An external power amplifier as well as duplex and interstage filters are needed to form a complete transmit chain for each band. LGE Internal Use Only - 54 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 54 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. Copyright © 2009 LG Electronics. Inc. All right reserved. - 55 -...

  • Page 55: Gsm Power Amplifi Er Module

    C453 C448 C454 C455 C456 0.1u [Figure 4.4-1] Schematic Diagram of 2.5G PAM(TQM7M5005) [Table 4.4-1] TQM7M5005 Pin description LGE Internal Use Only - 56 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 56: Wcdma Band1 Power Amplifier Module

    100p 100p 2.2u 100p [Figure 4.5-1] Schematic Diagram of WCDMA Band1/8 PAM (ACPM7383) [Table 4.5-1] ACPM7383 Pin description Copyright © 2009 LG Electronics. Inc. All right reserved. - 57 - LGE Internal Use Only Only for training and service purposes...

  • Page 57: Wcdma Band1/8 Low Noise Amplifier

    R411 C475 C504 12pF [Figure 4.6-1] Schematic Diagram of WCDMA Band1 LNA (BGA711L7) [Table 4.6-1] BGA711L7 Pin description LGE Internal Use Only - 58 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 58: Wcdma Band1 Duplexer

    L414 GND1 GND6 82nH 2.7nH GND2 GND5 GND3 GND4 SAYFP1G95AA0B00 [Figure 4.7-1] Schematic Diagram of WCDMA Band1 Duplexer Copyright © 2009 LG Electronics. Inc. All right reserved. - 59 - LGE Internal Use Only Only for training and service purposes...

  • Page 59: Bluetooth

    TCXO frequency and provides full radio compatibility to operate simultaneously with GPS and cellular radios. LGE Internal Use Only - 60 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 60 XTAL_PD_GPIO5_TX_PU_TDO_TX_PU_ UART_RTS_N UART_BT_CTS UART_BT_TX RF_ACTIVE_GPIO4 UART_RXD UART_BT_TX UART_BT_RX BT_PRIORITY_STATUS_GPIO3 UART_TXD UART_BT_RX TX_CONFX_WLAN_ACTIVITY_GPIO2 BT_HOST_WAKEUP HOST_WAKE_USB_DETACH_GPIO_1 HUSB_DN BT_WAKEUP BT_WAKE_GPIO_0 HUSB_DP Copyright © 2009 LG Electronics. Inc. All right reserved. - 61 - LGE Internal Use Only Only for training and service purposes...

  • Page 61: Trouble Shooting

    - Connect mobile switch cable between Communication test set and DUT when you need to make a phone call. - Follow trouble shooting procedure LGE Internal Use Only - 62 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 62: Power On Trouble

    Change the main board Change the main board Power on is ok? Power on is ok? Copyright © 2009 LG Electronics. Inc. All right reserved. - 63 - LGE Internal Use Only Only for training and service purposes...
  • Page 63 100K KP_OUT(0) C308 R322 SEND : KEY_IN(1) + KEY_OUT(1) 220K CLR : KEY_IN(2) + KEY_OUT(1) 2SA2030 Q300 KP_IN(6) LGE Internal Use Only - 64 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 64 5. Trouble shooting GD910 service manual C230 C228 C226 C225 C224 C229 C219 C232 C232 Copyright © 2009 LG Electronics. Inc. All right reserved. - 65 - LGE Internal Use Only Only for training and service purposes...
  • Page 65 5. Trouble shooting GD910 service manual X100 X400 END-Key LGE Internal Use Only - 66 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 66: Charging Trouble

    5. Trouble shooting GD910 service manual 5.3 Charging Trouble Checking Flow Copyright © 2009 LG Electronics. Inc. All right reserved. - 67 - LGE Internal Use Only Only for training and service purposes...
  • Page 67 IVDC C301 C302 C303 _CHG_EN TA_DETECT C304 C305 IMIN 2.2u 2.2u IUSB R303 ISL9221 R305 R304 R306 8.2K LGE Internal Use Only - 68 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 68 GD910 service manual Checking Point Checking Point D300 D300 U300 U300 D300 U300 R100 R100 R101 R100 R101 R101 Copyright © 2009 LG Electronics. Inc. All right reserved. - 69 - LGE Internal Use Only Only for training and service purposes...

  • Page 69: Usb Trouble

    Is USB function ok? USB function is ok? USB function is ok? main board main board main board main board LGE Internal Use Only - 70 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 70 C302 C303 _CHG_EN TA_DETECT C304 C305 IMIN 2.2u 2.2u IUSB R303 ISL9221 R305 R304 R306 8.2K Checking Point Copyright © 2009 LG Electronics. Inc. All right reserved. - 71 - LGE Internal Use Only Only for training and service purposes...

  • Page 71: Sim Detect Trouble

    Click TP1 Do SIM CLK(C248), Change the main board SIM_IO(C245) Change the main board Work well? Click TP2 LGE Internal Use Only - 72 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 72 1V8_SD VMME VDDMME VDDRF2 VRF2 VRF3 DDRF13_AFC VRF1 VVIB VDDSIMVIB VSIM VAFC VRTC VDDUMTS VUMTS VDDSD1 SD1_FB SD1_FBL Copyright © 2009 LG Electronics. Inc. All right reserved. - 73 - LGE Internal Use Only Only for training and service purposes...
  • Page 73 GD910 service manual GD910 service manual Checking Point C248 C246 C248 C245 C246 C245 C225 C225 U200 U200 LGE Internal Use Only - 74 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 74: Side Key Trouble

    Change the Key FPCB Change the main board Change the Key PCB Change the main board Change the Key FPCB Copyright © 2009 LG Electronics. Inc. All right reserved. - 75 - LGE Internal Use Only Only for training and service purposes...

  • Page 75: Audio Trouble

    5.7 Audio Trouble GD910 service manual 5.7.1 Speaker path Checking Flow Is there analog signal at R218, R217? Check TP1 LGE Internal Use Only - 76 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 76 R217 C253 SPK_OUT_N VDD1 VDD2 C257 R218 CN204 SPK_OUT_P L417 120nH L418 120nH SPK_AMP_EN R219 100K C264 C265 Copyright © 2009 LG Electronics. Inc. All right reserved. - 77 - LGE Internal Use Only Only for training and service purposes...

  • Page 77: Microphone Trouble

    5. Trouble shooting GD910 service manual 5.8 Microphone Trouble GD910 service manual 5.8.1 Microphone for main MIC Checking Flow LGE Internal Use Only - 78 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 78 C238 C237 33n MIC_N SOB-311S44-RC10W C241 C242 R213 R214 2700 2700 R215 VMIC_P C243 L100 L101 100nH 100nH Copyright © 2009 LG Electronics. Inc. All right reserved. - 79 - LGE Internal Use Only Only for training and service purposes...

  • Page 79: Vga Camera

    Change the main board Change the main board Replacef new camera module. Replacef new camera module. Working properly? Working properly? LGE Internal Use Only - 80 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 80 INOUT_B4 INOUT_A4 R117 2.2K R118 2.2K ICVE10184E150R500FR FL405 FL404 FL404 C478 C478 FL405 FL405 C256 C256 C255 C255 Copyright © 2009 LG Electronics. Inc. All right reserved. - 81 - LGE Internal Use Only Only for training and service purposes...

  • Page 81: Main Lcd Trouble

    5. Trouble shooting GD910 service manual 5.10 Main LCD Trouble Checking Flow LGE Internal Use Only - 82 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 82 DIF_VSYNC _DIF_CS1 DIF_D5 _DIF_CS1 _DIF_RESET DIF_D6 _DIF_RESET DIF_D7 LCD_RS DIF_D7 LCD_RS _DIF_WR _DIF_RD _DIF_WR 2V62_VIO CN203 R216 2.2K Copyright © 2009 LG Electronics. Inc. All right reserved. - 83 - LGE Internal Use Only Only for training and service purposes...

  • Page 83: Main Clock Part

    R426 100K 2G_DATA 2G_CLK 2G_BS 2V85_VTCXO 2V85_VRF R407 C446 C447 0.1u X400 R410 NC2_GND2 NC1_GND1 C452 TG-5021BA 26MHz LGE Internal Use Only - 84 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 84: Rf Component

    PAM (GSM 900/1800/1900) U406 LNA (WCDMA 2100) FL400 FL402 Duplexer (WCDMA 2100) U404 RF Transceiver U407 DC/DC Converter(For 3G PAM) Copyright © 2009 LG Electronics. Inc. All right reserved. - 85 - LGE Internal Use Only Only for training and service purposes...

  • Page 85: Rf Signal Path

    GD910 service manual 5.13 RF SIGNAL PATH 5.13.1 UMTS PATH (WCDMA 2100) 5.16.2 GSM PATH (EGSM900/ DCS1800/ PCS1900) LGE Internal Use Only - 86 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 86: Trouble Shooting Of Gsm Part

    5. Trouble shooting GD910 service manual 5.14 Trouble Shooting of GSM Part (EGSM900/ DCS1800/ PCS1900) Copyright © 2009 LG Electronics. Inc. All right reserved. - 87 - LGE Internal Use Only Only for training and service purposes...
  • Page 87 2G_EN R426 100K 2G_DATA 2G_CLK 2G_BS 2V85_VTCXO R407 C446 C447 0.1u X400 R410 NC2_GND2 NC1_GND1 C452 TG-5021BA 26MHz LGE Internal Use Only - 88 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 88 5. Trouble shooting GD910 service manual 5.14.2 Checking Front-End Module Block Checking Flow Copyright © 2009 LG Electronics. Inc. All right reserved. - 89 - LGE Internal Use Only Only for training and service purposes...
  • Page 89 5. Trouble shooting GD910 service manual Checking Points LGE Internal Use Only - 90 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 90 FB401 1800 ANT_SEL2 FB402 1800 FB403 1800 FB404 1800 ANT_SEL6 2V85_VRF U403 ANT_SEL1 ANT_SEL4 C444 ANT_SEL3 ANT_SEL5 NL27WZ32USG Copyright © 2009 LG Electronics. Inc. All right reserved. - 91 - LGE Internal Use Only Only for training and service purposes...
  • Page 91 Checking Point Checking Point Checking Point Checking Point Checking Point Checking Point Checking Point Checking Point Checking Points LGE Internal Use Only - 92 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 92 GSM1900_RX1 GND1 GSM1900_RX2 C436 2.2p GND3 GND2 UMTS1 GND4 UMTS2 C437 1.5p GND5 UMTS3 L404 5.1nH C441 1.5p Copyright © 2009 LG Electronics. Inc. All right reserved. - 93 - LGE Internal Use Only Only for training and service purposes...
  • Page 93 ....LGE Internal Use Only - 94 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 94 Description PA_LEVEL Power Amp Gain Control. Typically, 0.2 ~1.6V VBAT PAM Supply Voltage (Vcc > 3V) Table 1. Copyright © 2009 LG Electronics. Inc. All right reserved. - 95 - LGE Internal Use Only Only for training and service purposes...

  • Page 95: Trouble Shooting Of Wcdma Part

    5. Trouble shooting GD910 service manual GD910 service manual 5.15 Trouble Shooting of WCDMA Part Checking Flow Checking Points LGE Internal Use Only - 96 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 96 5.15.1 Checking VCTCXO Refer to GSM Part (15.14.1) 5.15.2 Checking Mobile SW & FEM Refer to GSM Part (15.14.2) Copyright © 2009 LG Electronics. Inc. All right reserved. - 97 - LGE Internal Use Only Only for training and service purposes...
  • Page 97 5. Trouble shooting GD910 service manual 5.15.3 Checking WCDMA Rx part Checking Flow LGE Internal Use Only - 98 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 98 RFOUT 2V85_VRF BC2 : SAFEB1G96FL0F00 1.5nH L420 4.3nH RREF C498 C473 L425 R411 C475 C504 12pF C474 100p Copyright © 2009 LG Electronics. Inc. All right reserved. - 99 - LGE Internal Use Only Only for training and service purposes...
  • Page 99 5. Trouble shooting GD910 service manual 5.15.4 Checking WCDMA TX part Checking Flow LGE Internal Use Only - 100 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 100 PGND GND3 GND4 ACPM-7383 C466 C468 C464 C465 C508 C467 SAYFP1G95AA0B00 1000 pF 2.2u 100p 100p 2.2u 100p Copyright © 2009 LG Electronics. Inc. All right reserved. - 101 - LGE Internal Use Only Only for training and service purposes...
  • Page 101 PAM Supply Voltage (3.2V < Vcc < 4.2V) 3G_PA_MODE1 High (2.2–3.1V), Low (0.0V–0.5V). PA “on” (2.2–3.1V), PA “shut down” (0.0V–0.5V). LGE Internal Use Only - 102 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 102: Trouble Shooting Of Bluetooth

    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 Copyright © 2009 LG Electronics. Inc. All right reserved. - 103 - LGE Internal Use Only...
  • Page 103 Check U409,X400,U404 And Replace at R425 BT_Reset_N Check U102 and Replace Bluetooth on is OK? Re-download SW and try again LGE Internal Use Only - 104 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 104 UART_BT_CTS XTAL_PD_GPIO5_TX_PU_TDO_TX_PU_ UART_RTS_N UART_BT_TX RF_ACTIVE_GPIO4 UART_RXD UART_BT_TX UART_BT_RX BT_PRIORITY_STATUS_GPIO3 UART_TXD UART_BT_RX TX_CONFX_WLAN_ACTIVITY_GPIO2 BT_HOST_WAKEUP HOST_WAKE_USB_DETACH_GPIO_1 HUSB_DN BT_WAKEUP BT_WAKE_GPIO_0 HUSB_DP Copyright © 2009 LG Electronics. Inc. All right reserved. - 105 - LGE Internal Use Only Only for training and service purposes...

  • Page 105: Download & S/W Upgrade

    If you are going to use battery, the voltage of the battery should be over 3.7V for stable power supplying during S/W download. LGE Internal Use Only - 106 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 106: Download Program User Guide

    GD910 service manual 6.2 Download program user guide 1. Double Click download tool 2. click DLL file select Copyright © 2009 LG Electronics. Inc. All right reserved. - 107 - LGE Internal Use Only Only for training and service purposes...
  • Page 107 6. Download & S/W upgrade GD910 service manual 3. Select GD910 DLL File GD910.dll 4.Press bin select menu and select GD910.bin GD910.bin LGE Internal Use Only - 108 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 108 6. Download & S/W upgrade GD910 service manual 5. Click start ※ Downloading : END Copyright © 2009 LG Electronics. Inc. All right reserved. - 109 - LGE Internal Use Only Only for training and service purposes...

  • Page 109: Block Diagram

    7. Block Diagram GD910 service manual 7. Block Diagram GSM900/1800/1900 UMTS Band1(WCDMA2100) LGE Internal Use Only - 110 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 110: Circuit Diagram

    4.7K I2C1 I2C2 C145 R117 2.2K U103 0.1u R118 2.2K MAIN PMIC VGA CAMERA NC7WZ08L8X CHARGE PUMP TOUCH Copyright © 2009 LG Electronics. Inc. All right reserved. - 111 - LGE Internal Use Only Only for training and service purposes...
  • Page 111 VBAT VOUT RP103K251D BACK_UP_EN CN304 C255 C256 C478 C270 VOUT C271 VIB_EN C272 CN305 C513 C514 MOTOR PAD LGE Internal Use Only - 112 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 112 RSB6.8CST2R ZD303 RCLAMP0521P_TCT RCLAMP0521P_TCT VGA_CAM_DATA[4] INOUT_B1 INOUT_A1 VGA_CAM_DATA[5] INOUT_B2 INOUT_A2 VGA_CAM_DATA[6] INOUT_B3 INOUT_A3 VGA_CAM_DATA[7] INOUT_B4 INOUT_A4 ICVE10184E150R500FR FL405 Copyright © 2009 LG Electronics. Inc. All right reserved. - 113 - LGE Internal Use Only Only for training and service purposes...
  • Page 113 C501 U407 L416 3.3uH PVIN WDCDC_VCON VCON C482 C483 C484 SGND 4.7u 2.2n C485 PGND LM3208TL R419 WDCDC_EN LGE Internal Use Only - 114 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 114: Bga Pin Map

    ● ● ● ●●● ●● ●● ●●●● ● ● ● ● ● ●● ●●● ●● ● : NC Pin Copyright © 2009 LG Electronics. Inc. All right reserved. - 115 - LGE Internal Use Only Only for training and service purposes...
  • Page 115 GD910 service manual PMB6821 PMB6821 Pin Configuration (Top View) PMB6821 Pin Configuration (Top View) : NC Pin : NC Pin LGE Internal Use Only - 116 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 116 9. BGA Pin Map GD910 service manual PMB6952 Pin Configuration (Top View) : NC Pin Copyright © 2009 LG Electronics. Inc. All right reserved. - 117 - LGE Internal Use Only Only for training and service purposes...
  • Page 117 LGE Internal Use Only - 118 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 118: Pcb Layout

    Main clock All function U302 U100 BT chip Memory All function FL302 U201 BT BPF Charge Pump BT TX/RX Copyright © 2009 LG Electronics. Inc. All right reserved. - 119 - LGE Internal Use Only Only for training and service purposes...
  • Page 119 NOR GATE Side key Side Key Side key SW200 CN202 Detector Connector Switch Power Touch CN203 Connector MIC200 Audio LGE Internal Use Only - 120 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 120: Rf Calibration

    GD910 service manual 11. RF Calibration 11.1 Test Equipment Setup 11.2 Calibration Step 11.2.1. Turn on the Phone. Execute “HK_36.exe” Copyright © 2009 LG Electronics. Inc. All right reserved. - 121 - LGE Internal Use Only Only for training and service purposes...
  • Page 121 GD910 service manual GD910 service manual 11.2.2. Click “SETTING” Menu 11.2.3. Setup “Ezlooks” menu such as the following fi gure LGE Internal Use Only - 122 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 122 11.2.4. Setup “Line System” menu such as the following fi gure 11.2.4. Setup “Line System” menu such as the following figure 11.2.5 Setup Logic operation such as the following fi gure. Copyright © 2009 LG Electronics. Inc. All right reserved. - 123 - LGE Internal Use Only...
  • Page 123 CELL: Call Test Equipment 11.2.6. Select “MODEL”. 11.2.7. Click “START” for RF calibration 11.2.8. RF Calibration fi nishes LGE Internal Use Only - 124 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 124 1. The state of Phone is “ ptest mode “ during the CALIBRATION. 2. Calibration program automatically changes either “normal mode” or “ptest mode”. 3. Phone operation Mode Copyright © 2009 LG Electronics. Inc. All right reserved. - 125 - LGE Internal Use Only...
  • Page 125 LGE Internal Use Only - 126 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 126: Exploded View & Replacement Part List

    12. EXPLODED VIEW & REPLACEMENT PART LIST 12.1 EXPLODED VIEW Copyright © 2009 LG Electronics. Inc. All right reserved. - 127 - LGE Internal Use Only Only for training and service purposes...
  • Page 127 ASS’Y EXPLODED VIEW LGE Internal Use Only - 128 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 128: Replacement Parts

    MOLD, PC LUPOY SC-1004A, , , , , COLOR WITHOUT MGAF00 GASKET,WATERPROOF MGAF0000401 COMPLEX, (empty), , , , , COLOR Copyright © 2009 LG Electronics. Inc. All right reserved. - 127 - LGE Internal Use Only Only for training and service purposes...
  • Page 129 COLOR WITHOUT ADBY00 DECO ASSY ADBY0015601 COLOR WITHOUT MFBC00 FILTER,SPEAKER MFBC0048701 COMPLEX, (empty), , , , , COLOR LGE Internal Use Only - 128 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 130 COMPLEX, (empty), , , , , COLOR WITHOUT MPBU03 PAD,CONNECTOR MPBU0069401 COMPLEX, (empty), , , , , COLOR Copyright © 2009 LG Electronics. Inc. All right reserved. - 129 - LGE Internal Use Only Only for training and service purposes...
  • Page 131 COMPLEX, (empty), , , , , COLOR WITHOUT MLAZ00 LABEL MLAZ0051701 COMPLEX, (empty), , , , , COLOR LGE Internal Use Only - 130 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 132 TIMT0006901 UNFIXED SMZY00 MODULE,ETC SMZY0021201 SAFY PCB ASSY,MAIN SAFY0322201 SAFB PCB ASSY,MAIN,INSERT SAFB0100901 POLYI ,0.2 mm,DOUBLE ,WP1-GD910 CHANGE ,; , , , , SPKY PCB,SIDEKEY SPKY0074501 , , , , , SAFF00 PCB ASSY,MAIN,SMT SAFF0235501 PCB ASSY,MAIN,SMT SAFC00 SAFC0128501 BOTTOM...
  • Page 133 ECCH0000198 2.2 uF,6.3V ,M ,X5R ,TC ,1005 ,R/TP C210 CAP,CERAMIC,CHIP ECCH0009101 0.1 uF,6.3V ,K ,X5R ,TC ,0603 ,R/TP LGE Internal Use Only - 132 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 134 ECZH0001215 1 uF,10V ,K ,X5R ,TC ,1005 ,R/TP C255 CAP,CHIP,MAKER ECZH0001215 1 uF,10V ,K ,X5R ,TC ,1005 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. - 133 - LGE Internal Use Only Only for training and service purposes...
  • Page 135 ECCH0009106 10 nF,16V ,K ,X7R ,TC ,0603 ,R/TP C408 CAP,CERAMIC,CHIP ECCH0000901 2.2 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP LGE Internal Use Only - 134 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 136 ECZH0000822 1.5 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP C442 CAP,CHIP,MAKER ECZH0025917 47 pF,25V ,J ,NP0 ,TC ,0603 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. - 135 - LGE Internal Use Only Only for training and service purposes...
  • Page 137 ECZH0025911 12 pF,25V ,J ,NP0 ,TC ,0603 ,R/TP C508 CAP,CERAMIC,CHIP ECCH0000198 2.2 uF,6.3V ,M ,X5R ,TC ,1005 ,R/TP LGE Internal Use Only - 136 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 138 5.1 nH,J ,1005 ,R/TP ,chip coil L405 INDUCTOR,CHIP ELCH0012501 27 nH,G ,1005 ,R/TP ,chip coil L406 INDUCTOR,CHIP ELCH0003815 2.7 nH,S ,1005 ,R/TP , Copyright © 2009 LG Electronics. Inc. All right reserved. - 137 - LGE Internal Use Only Only for training and service purposes...
  • Page 139 4.7 Kohm,1/20W(0.05W) ,J ,0603 ,R/TP R116 RES,CHIP ERHY0009526 4.7 Kohm,1/20W(0.05W) ,J ,0603 ,R/TP R117 RES,CHIP ERHY0009516 2.2 Kohm,1/20W(0.05W) ,J ,0603 ,R/TP LGE Internal Use Only - 138 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 140 20 ohm,1/20W(0.05W) ,F ,0603 ,R/TP R408 RES,CHIP ERHY0009508 1.2 Kohm,1/20W(0.05W) ,J ,0603 ,R/TP R409 RES,CHIP ERHY0000185 820 ohm,1/16W ,F ,1005 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. - 139 - LGE Internal Use Only Only for training and service purposes...
  • Page 141 SLP1006P2 ,5 V,100 W,R/TP ,1.0x0.6x0.5t ,; , , , , , ZD200 DIODE,TVS EDTY0009601 ,[empty] ,[empty] ,[empty] ,[empty] LGE Internal Use Only - 140 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 142 ECCH0005604 ,[empty] ,[empty] ,[empty] ,[empty] ,[empty] ,0.8 mm C314 CAP,CERAMIC,CHIP ECCH0009101 0.1 uF,6.3V ,K ,X5R ,TC ,0603 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. - 141 - LGE Internal Use Only Only for training and service purposes...
  • Page 143 SMD ,SMD ,18 V,4ch. EMI_ESD Filter (50 Ohm,15pF) J200 CONN,SOCKET ENSY0022102 6 ,ANGLE , ,2.54 mm,Changed Metal shell LGE Internal Use Only - 142 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 144 1 Kohm,1/20W(0.05W) ,J ,0603 ,R/TP R425 RES,CHIP ERHY0009504 1 Kohm,1/20W(0.05W) ,J ,0603 ,R/TP R426 RES,CHIP ERHY0009506 100 Kohm,1/20W(0.05W) ,J ,0603 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. - 143 - LGE Internal Use Only Only for training and service purposes...
  • Page 145 ,NT3916(Novatek) , SPCY00 PCB,FLEXIBLE SPCY0197001 POLYI ,0.14 mm,SINGLE , ,; , , , , , , , , , LGE Internal Use Only - 144 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 146: Accessory

    100-240V ,5060 Hz,5.1 V,0.7 A,CE ,AC-DC ADAPTOR ,; ADAPTOR,AC-DC SSAD0031702 ,90Vac~264Vac ,4.75Vdc~5.25Vdc ,700mA ,5060 , ,WALL 2P ,I/O CONNECTOR , Copyright © 2009 LG Electronics. Inc. All right reserved. - 145 - LGE Internal Use Only Only for training and service purposes...
  • Page 147 Note LGE Internal Use Only - 146 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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