Page 1 Internal Use Only Service Manual GM750 Date: September, 2009 / Issue 1.0...
Page 2: Table Of Contents
4.6 Checking GSM Block ..........111 4.7 Power ON Troubleshooting ........117 4.8 Charger Troubleshooting ..........119 4.9 USB trouble .............122 Copyright © 2009 LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...
Page 4: Introduction
This model complies with rules regarding radiation and radio frequency emission as defined by local regulatory agencies. In accordance with these agencies, you may be required to provide information such as the following to the end user. Copyright © 2009 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only...
Page 5: Only For Training And Service Purposes
• When returning system boards or parts like EEPROM to the factory, use the protective package as described. LGE Internal Use Only - 6 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 6: Performance
Part Name Comment Digital Baseband MSM7200A : Qualcomm Analog Baseband PM7540 : Qualcomm RF Chip RTR6285 : Qualcomm Copyright © 2009 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
Page 7: Hw Features
Main : Internal Fixed Type System connector 5 Pin u-USB Ear Phone Jack 12x18 Oval Type (Speaker/Receiver dual mode) LGE Internal Use Only - 8 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 8: Only For Training And Service Purposes
Speaker Phone mode Support Travel Adapter CDROM Stereo Headset Data Cable T-Flash Yes ( Up to 32GB ) (External Memory) Copyright © 2009 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
Page 9: Sw Features
Image & Moving Image) (Music Contents) Java Contents Wallpaper Ringtone external memory support SDA2.0 specification, up to (microSD) 32GB LGE Internal Use Only - 10 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 10: Only For Training And Service Purposes
Up to 3 images (1600x480) Shot Album&Slide Slide show Supported by LG My Stuff show & MS Pictures and Videos Copyright © 2009 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
Page 11: Only For Training And Service Purposes
MP3, AAC, AAC+, AAC-LC, XMF 1.01, AMR supported AMR-NB Music player skin Windows Media Player FM Radio USA/Japan band with RDS Speakerphone LGE Internal Use Only - 12 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 12: Only For Training And Service Purposes
XHTML1.1 Mobile ) HTML4.01 Java MIDP J2ME support Game & Downloadable Contents CLDC CLDC 1.1 Flash Flash Game Copyright © 2009 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
Page 13: Only For Training And Service Purposes
Local Time / Selected Area Time Normal Last Dialed Number Features Last Received Number X Last Missed Number Scratch Pad Memory LGE Internal Use Only - 14 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 14: Only For Training And Service Purposes
Read Cell Broadcast O Cell Broadcast Categories Cell Broadcast Supports filtering with Message Language language IDs (German,English,Italian,French,Spanish, Dutch,Swedish,Danish,Portuguese,Finnish,Norweggian ,Greek,Turkish,Hungarian,Polish,Czech) Copyright © 2009 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
Page 15: Only For Training And Service Purposes
O All incoming Calls when roaming Conference O up to 5 calls Call Plug Type SIM Lock SIM Toolkit O Prepaid Operation LGE Internal Use Only - 16 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 16: Only For Training And Service Purposes
Max 300kbyte Messaging Moving Picture O Video MMS Max 300kbyte Attachable Voice Attachable O AMR Help Menu Others Copyright © 2009 LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
Page 17: Only For Training And Service Purposes
Screen Saver Ringtones Karaoke Stutter Sound Flip tone Button tone can be enable or disable button press sound. Others LGE Internal Use Only - 18 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 18: Only For Training And Service Purposes
O supported by MS ActiveSync Multimedia O supported by MS ActiveSync Contents Sync Scheduler Sync O supported by MS ActiveSync Sync ML Copyright © 2009 LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
Page 19: Only For Training And Service Purposes
6min, 4min, 5min, 6min, 7min, 8min, 9min, 7min, 8min, 9min, 10min 10min Power-off Alarm On Alarm Event Display LGE Internal Use Only - 20 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 20: Only For Training And Service Purposes
1min, 2min, 3min, 9min, 10min 4min, 5min, 6min, 7min, 8min, 9min, 10min Power-off Alarm On Alarm Event Display Copyright © 2009 LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...
Page 21: Hw Spec
: -98dBm/-96dBm (2.439%) AM Suppression -98dBm/-96dBm (2.439%) GSM : -31dBm DCS : -29dBm Timing Advance ± 0.5T LGE Internal Use Only - 22 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 22: Only For Training And Service Purposes
< 17.5 %, when Pout ≥ -20 dBm Peak Code Domain Error < -15 dB at Pout -20 dBm Copyright © 2009 LG Electronics. Inc. All right reserved. - 23 - LGE Internal Use Only Only for training and service purposes...
Page 23: Only For Training And Service Purposes
-0.5/+0.5 -0.5/+0.5 In Uplink -0.5/-1.5 -1/-3 -1.5/-4 H H H H H H group(10equal command group) +8/+12 +16/+24 LGE Internal Use Only - 24 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 24: Only For Training And Service Purposes
Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, (BLER or R), 16QAM Only 6=15/0 BLER < 10% or R >= 700kbps Copyright © 2009 LG Electronics. Inc. All right reserved. - 25 - LGE Internal Use Only Only for training and service purposes...
Page 25: Only For Training And Service Purposes
17.8~25.7dBm / 3.84 MHz, 16.8~25.7dBm / 3.84 5=15/15 18.8~25.7dBm / 3.84 MHz Spectrum Emission Mask Adjacent Channel Leakage Power Ratio (ACLR) LGE Internal Use Only - 26 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 26: Exploded View
≥ -10dBm(1Mbps,2Mbps,5.5Mbps,11Mbps) @ FER ≤ Rx Max input Sensitivity ≥ ≤ Rx Adjacent Channel 35dB @FER Rejection interference input signal -70dBm@fc±25MHz(11Mbps) Copyright © 2009 LG Electronics. Inc. All right reserved. - 27 - LGE Internal Use Only Only for training and service purposes...
Page 27: Only For Training And Service Purposes
1574.42 MHz ~ 1576.42 MHz Minimum Sensitivity 1 satellite ≥ -142dBm, 7 satellites ≥ -147dBm at coarse time aiding LGE Internal Use Only - 28 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 28: Technical Brief
GMSK-modulated or 8-PSK-modulated signal to RF. [Figure 1-1] Block diagram of RF part A generic, high-level functional block diagram of GM750 is shown in Figure 1-1. One antenna collects base station forward link signals and radiates handset reverse link signals. The antenna connects with receive and transmit paths through a SKY77521 (FEM, Front End Module + GSM PAM).
Page 29: Only For Training And Service Purposes
2. The amplitude-modulated (AM) component is applied to the ramping control pin of Polar power amplifier from a DAC within the MSM GM750 power supply voltages are managed and regulated by the PM7540 Power Management IC. This versatile device integrates all wireless handset power management, general housekeeping, and user interface support functions into a single mixed signal IC.
Page 31: Only For Training And Service Purposes
DC offset corrections. The filter outputs are buffered and passed on to the MSM7200A IC for further processing as shown in Figure 1-3. LGE Internal Use Only - 32 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 32: Only For Training And Service Purposes
3. Technical Brief GM750 [Figure 1-3] RTR6285 RX feature Copyright © 2009 LG Electronics. Inc. All right reserved. - 33 - LGE Internal Use Only Only for training and service purposes...
Page 33: Only For Training And Service Purposes
GSM application. Both high-band and low band outputs are followed by resistive pads to ensure that the load presented to the outputs remains close to 50ohm. LGE Internal Use Only - 34 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 34: Umts Mode
The UMTS baseband outputs are turned off when the RTR6285 is downconverting GSM signals and on when the UMTS is operating. [Figure 1-5] UMTS Receiver Inputs Topologies Copyright © 2009 LG Electronics. Inc. All right reserved. - 35 - LGE Internal Use Only...
Page 35: Only For Training And Service Purposes
The RTR6285 IC is able to support UMTS 2100/1900/1800/1700/900 and 850 mode transmitting. This design guideline shows UMTS 2100, UMTS1900 and UMTS900 applications. LGE Internal Use Only - 36 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 36: Only For Training And Service Purposes
3. Technical Brief GM750 [Figure 1.6] RTR6285 IC Functional Block Diagram Copyright © 2009 LG Electronics. Inc. All right reserved. - 37 - LGE Internal Use Only Only for training and service purposes...
Page 37: Gps Mode
GPS LNA. The impedance transformer circuit topology is shown in Figure 1-7. [Figure 1.7] GPS Input Network Topology LGE Internal Use Only - 38 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 38: Lo Generation And Distribution Circuit
With the integrated fractional- N PLL synthesizers, the RTR6285 ICs have the advantage of more flexible loop bandwidth control, fast lock time, and low-integrated phase error. Copyright © 2009 LG Electronics. Inc. All right reserved. - 39 - LGE Internal Use Only...
Page 39: Off-Chip Rf Components
(GPRS) multi-slot operation and EDGE Polar Modulation. WCDMA switch-through support is provided by three dedicated high-linearity ports. [Table 1] Antenna Switch Module Logic LGE Internal Use Only - 40 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 40: Only For Training And Service Purposes
3. Technical Brief GM750 [Figure 1.8] SKY77521 Functional Block Diagram 3.6.3 W-CDMA Dual-Band POWER AMPLIFIER (U101: AWT6224R) Copyright © 2009 LG Electronics. Inc. All right reserved. - 41 - LGE Internal Use Only Only for training and service purposes...
Page 41: Only For Training And Service Purposes
3. Technical Brief GM750 [Figure 1.9] AWT6224R Functional Block Diagram. LGE Internal Use Only - 42 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 42: Only For Training And Service Purposes
3. Technical Brief GM750 3.6.4 W-CDMA 1900 POWER AMPLIFIER (U102: AWT6278R) [Figure 1.10] AWT6278R Functional Block Diagram. Copyright © 2009 LG Electronics. Inc. All right reserved. - 43 - LGE Internal Use Only Only for training and service purposes...
Page 43: Digital Baseband(Dbb/Msm7200A)
- Dual Memory Buses(EBI1-SDRAM & EBI2-NAND Flash) - External Memory Interface (Micro SD) Data Communication - Bluetooth - Slave USB LGE Internal Use Only - 44 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 44: Hardware Architecture
3. Technical Brief 3.2 Hardware Architecture Figure. Simpliﬁ ed Block Diagram of System Copyright © 2009 LG Electronics. Inc. All right reserved. - 45 - LGE Internal Use Only Only for training and service purposes...
Page 45: Only For Training And Service Purposes
Speaker EVRC, QCELP AMR, CMX, MIDI Tx DAC 4 Bit PM7540 USIM Figure. Simplified Block Diagram of MSM7200A LGE Internal Use Only - 46 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 46: Subsystem(Msm7200A)
The RF interface communicates with the mobile station’s external RF and analog baseband circuits. Signals to these circuits control signal gain in the Rx and Tx signal path and maintain The system’s frequency reference. Copyright © 2009 LG Electronics. Inc. All right reserved. - 47 - LGE Internal Use Only...
Page 47: Only For Training And Service Purposes
The MSM7200 device meets the intent of the ANSI/IEEE 1149.1A-1993 feature list. The JTAG interface can be used to test digital interconnects between devices within the mobile station during manufacture. LGE Internal Use Only - 48 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 48: Only For Training And Service Purposes
The MSM7200A device integrates a universal serial bus (USB) controller that supports both unidirectional and bidirectional transceiver interfaces. The USB controller acts as a USB peripheral communicating with the USB host. Copyright © 2009 LG Electronics. Inc. All right reserved. - 49 - LGE Internal Use Only...
Page 49: Power Block
Interrupt Manager for time-critical information. Another dedicated IC Interface circuit monitors multiple trigger events and controls the power-on sequence. LGE Internal Use Only - 50 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 50: Only For Training And Service Purposes
3. Technical Brief Figure. PM7540 Functional Block Diagram Copyright © 2009 LG Electronics. Inc. All right reserved. - 51 - LGE Internal Use Only Only for training and service purposes...
Page 51: Only For Training And Service Purposes
U8210 Charging Control block 5~0 (%) 47~26 (%) 25~6 (%) 100~73 (%) 72~48 (%) GM750 Battery Bar Display (Stand By Condition) LGE Internal Use Only - 52 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 52: Only For Training And Service Purposes
(3.2V). The charging current is set to 80mA. Parameter Unit Trickle Current PM7540 Input Power Managemen Copyright © 2009 LG Electronics. Inc. All right reserved. - 53 - LGE Internal Use Only Only for training and service purposes...
Page 53: Only For Training And Service Purposes
• Charging time : Max 2.5h (Except time trickle charging) • Full charge indication current (icon stop current) : 120mA • Cut-off voltage : 3.20V LGE Internal Use Only - 54 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 54: External Memory Interface
(Flash / DRAM) NAND 1.8V H8BCS0UN0MCR Hynix 45ns / 333MHz -46M 1.8V SDRAM Table#1. External memory interface for GM750 Copyright © 2009 LG Electronics. Inc. All right reserved. - 55 - LGE Internal Use Only Only for training and service purposes...
Page 55: External Memory
MSM7200A nSDRAM_CAS MMC_DATA[3:0] External Memory MMC_CMD (MICRO SD card) MMC_CLK Figure. Simplified Block Diagram of Memory Interface LGE Internal Use Only - 56 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 56: H/W Sub System
ANT_SEL[0-3] : Ant Switch Module Mode Selection(WCDMA,GSM Tx/Rx,DCS- PCS Tx/Rx) GSM_PA_RAMP : Power Amp Gain Control of APC_IC Copyright © 2009 LG Electronics. Inc. All right reserved. - 57 - LGE Internal Use Only Only for training and service purposes...
Page 57: Only For Training And Service Purposes
RX SAW GPCS_INP GPCS_INP GPCS_INP PCS1900 FILTER GPCS_INN GPCS_INN GPCS_INN ANT_SEL0/1/2/3 CTRL0/1/2/3 Figure. Block Diagram of RF Interface LGE Internal Use Only - 58 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 58: Msm Sub System
UART signals are connected to MSM GPIO through IO connector with 115200 bps speed. GPIO_Map Name Note GPIO_86 UART3_RX Data_Rx GPIO_87 UART3_TX Data_Tx Table. UART Interface Copyright © 2009 LG Electronics. Inc. All right reserved. - 59 - LGE Internal Use Only Only for training and service purposes...
Page 59: Only For Training And Service Purposes
MSM7200A USBH_DM USBH_NEXT u-USB MAX14526 USBH_DP Connector. USBH_STOP USBH_DATA[0:7] Figure. USB block (MSM7200A Side & ISP1508AET, MAX14526 Side) LGE Internal Use Only - 60 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 60: Key Pad
Joystick CAMERA KEY_ROW[2] Table. Key Matrix Mapping Table Figure. Power ON / OFF & Suspend Button Keypad circuit Copyright © 2009 LG Electronics. Inc. All right reserved. - 61 - LGE Internal Use Only Only for training and service purposes...
Page 61: Only For Training And Service Purposes
3. Technical Brief Keypad Circuit Figure. Volume Figure. Camera & Multitasking Keypad Circuit LGE Internal Use Only - 62 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 62: Only For Training And Service Purposes
3. Technical Brief Figure. Optical Joystick Keypad Circuit Copyright © 2009 LG Electronics. Inc. All right reserved. - 63 - LGE Internal Use Only Only for training and service purposes...
Page 63: Only For Training And Service Purposes
3. Technical Brief 3.12.4. Touch Interface In GM750, 4-wire touch screen panel is used for user input method. Two resistive layers make up a 4-wire touch screen panel and are separated by insulating dots. The inside surface of each layer is coated with a transparent metal oxide coating that generates a gradient across each layer when voltage is applied.
Page 64: Only For Training And Service Purposes
1 RGB LED in LED Notification-RGB backlight circuit, which are driven by KEBY_BACKLIGHT line from MSM7200A GPIO90/89/88. i f i Figure. Schematic of KEY back light circuit Copyright © 2009 LG Electronics. Inc. All right reserved. - 65 - LGE Internal Use Only Only for training and service purposes...
Page 65: Audio And Sound
AUDIO_I2C_SCL HS_MIC MAX14526_I2C_SDA MAX14526 MAX14526_I2C_SCL MAX14526_INT Head Set FM_ANT u-USB_connector Figure. Block diagram of Audio & Sound path LGE Internal Use Only - 66 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 66: Only For Training And Service Purposes
The DSP audio processing is configured through the QDSP5000 command types and is not directly controlled by the microprocessor. Copyright © 2009 LG Electronics. Inc. All right reserved. - 67 - LGE Internal Use Only...
Page 67: Only For Training And Service Purposes
3. Technical Brief Figure. Detailed diagram of MSM7200A audio interface LGE Internal Use Only - 68 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 68: Only For Training And Service Purposes
MAX9877. The MAX9877 is available in a thermally efficient, space-saving 20-bump WLP package. Copyright © 2009 LG Electronics. Inc. All right reserved. - 69 - LGE Internal Use Only...
Page 69: Only For Training And Service Purposes
3. Technical Brief Figure. Detailed diagram of MAX9877 audio interface LGE Internal Use Only - 70 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 70: Only For Training And Service Purposes
3. Technical Brief Handset main MIC Block MSM7200A Block Head Set Jack Block Copyright © 2009 LG Electronics. Inc. All right reserved. - 71 - LGE Internal Use Only Only for training and service purposes...
Page 71: Only For Training And Service Purposes
3. Technical Brief Audio Subsystem(LM49150) Block & Analog S/W LGE Internal Use Only - 72 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 72: Camera Interface
Below figures shows the 5M camera I/F and ISP Block. 3.14.1 5 Mega Camera Interface Figure. Schematic of 5 Mega Camera I/F Figure. Schematic of ISP Block Copyright © 2009 LG Electronics. Inc. All right reserved. - 73 - LGE Internal Use Only Only for training and service purposes...
Page 73: Only For Training And Service Purposes
MSM7200A again. The camera module is controlled by I2C port from MSM7200A via ISP. LGE Internal Use Only - 74 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 74: Only For Training And Service Purposes
19.2MHz pixel clock (max.30fps@VGA), vertical sync signal, horizontal sync signal, reset signal and 8bits data from camera module. The camera module is controlled by I2C port from MSM7200A. Copyright © 2009 LG Electronics. Inc. All right reserved. - 75 - LGE Internal Use Only...
Page 75 U502(in Main PCB) is a Sub PMIC(LCD Backlight LED Driver, Charge pump DCDC and Auto Luminous Control). This part is controlled by I2C of MSM7200A. Figure. Schematic of Sub PMIC LGE Internal Use Only - 76 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 76: Lcd Module
MDDI_P_STB_M MDDI_P_STB_P MDDI_P_STB_P LCD_CS_N LCD_CS_N LCD_RESET_N LCD_RESET_N VREG_MSME_1.8V I/O Vcc(1.8V) VREG_LCD_2.8V Vcc(2.8V) PM7540 Figure. LCD I/F Block Diagram Copyright © 2009 LG Electronics. Inc. All right reserved. - 77 - LGE Internal Use Only Only for training and service purposes...
Page 77: Only For Training And Service Purposes
CN504). The LCD is controlled by MDDI Interface in MSM7200A. " 3 Figure. Schematic of LCD connector (in Main PCB) LGE Internal Use Only - 78 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 78: Only For Training And Service Purposes
RESET MDDI_DATA_P MAKER_ID(LOW) MDDI_DATA_M OTP(OPEN) MDDI_STB_P MDDI_STB_M LED5(CA) LED3(CA) LED1(CA) Table. Interface between LCD Module and Main Board Copyright © 2009 LG Electronics. Inc. All right reserved. - 79 - LGE Internal Use Only Only for training and service purposes...
Page 79: Proximity Sensor
U501 : GP2AP002S00F With the Control IC) Figure. Proximity Sensor Schematic Figure. Proximity Sensor Block Diagram MSM7200A GPIO 82: PROX_OUT LGE Internal Use Only - 80 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 80: Luminance Sensor
U502 : Backlight driver IC (BD6083) used I2C interface to MSM7200A U503 : Luminance Sensor Luminance Sensor Schematic Luminance Sensor Block Diagram (BD6083GUL) U502 ALS(BH1621FVC) U503 MSM7200A Copyright © 2009 LG Electronics. Inc. All right reserved. - 81 - LGE Internal Use Only Only for training and service purposes...
Page 81: Motion Sensor
According to tilt the cell phone, the screen is had rotated automatically. U504 :MMA7660FC IC used I2C interface to MSM7200A Motion Sensor Schematic Motion Sensor Block Diagram LGE Internal Use Only - 82 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 82: Main Features
- Internal User Memory over 128MB - 1500 mAh (Li-Ion Polymer) - Windows Mobile 6.5 Professional - Microsoft Office Mobile Copyright © 2009 LG Electronics. Inc. All right reserved. - 83 - LGE Internal Use Only Only for training and service purposes...
Page 83: Only For Training And Service Purposes
Multi-task & Volume Camera SIDEKEY SIDEKEY Key Back Light Logic Optical Joystick Main board, Bottom Main board, Top LGE Internal Use Only - 84 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 84: Only For Training And Service Purposes
WCDMA (I) Coupler FL108 PCS Rx SAW Filter U106 WCDMA (VIII) Coupler FL106 DCS Rx SAW Filter SW101 Test Connector Copyright © 2009 LG Electronics. Inc. All right reserved. - 85 - LGE Internal Use Only Only for training and service purposes...
Page 85: Only For Training And Service Purposes
VB501 Vibrator Pad U503 Luminance Sensor Main board, Bottom CN402 3pin Battery CN603 4pin Touch Con. Screen Con. LGE Internal Use Only - 86 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 86: Only For Training And Service Purposes
SW101 Reset Key KB101 Power ON/OFF Key X201 26MHz TCXO U202 Wi-Fi &BT&FM Module ANT201 Blue Tooth ANT Copyright © 2009 LG Electronics. Inc. All right reserved. - 87 - LGE Internal Use Only Only for training and service purposes...
Page 87: Trouble Shooting
FL109 FL104 U101 FL108 FL106 FL105 FL102 U102 U103 FL110 U108 U106 U107 FL112 Mobile Main Antenna PAD LGE Internal Use Only - 88 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 88: Only For Training And Service Purposes
U106 WCDMA (VIII) Coupler FL106 DCS Rx SAW Filter GPS Antenna PAD WCDMA Band I Diversity Antenna PAD Copyright © 2009 LG Electronics. Inc. All right reserved. - 89 - LGE Internal Use Only Only for training and service purposes...
Page 89: Only For Training And Service Purposes
4. TROUBLE SHOOTING 1.TROUBLE SHOOTING RF component (WCDMA(I) Diversity, Antenna PAD) RF component (GPS LNA(U104), W2100 Diversity RX SAW(FL111)) LGE Internal Use Only - 90 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 90: Signal Path
4. TROUBLE SHOOTING 1.TROUBLE SHOOTING 4.2 SIGNAL PATH GSM850/GSM900/DCS/PCS’s RX/TX Signal PATH A. GSM850/GSM900/DCS1800/PCS1900 RX PATH B. GSM850/GSM900/DCS1800/PCS1900 TX PATH Copyright © 2009 LG Electronics. Inc. All right reserved. - 91 - LGE Internal Use Only Only for training and service purposes...
Page 91: Only For Training And Service Purposes
WCDMA I,II and VIII Band RX Signal PATH C. WCDMA 1900 RX PATH D. WCDMA 900 RX PATH E. WCDMA 2100 RX PATH LGE Internal Use Only - 92 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 92: Only For Training And Service Purposes
WCDMA I,II and VIII Band TX Signal PATH C1. WCDMA 1900 TX PATH D1. WCDMA 900 TX PATH E1. WCDMA 2100 TX PATH Copyright © 2009 LG Electronics. Inc. All right reserved. - 93 - LGE Internal Use Only Only for training and service purposes...
Page 93: Checking Tcxo Block
The output frequency (19.2MHz) of TCXO (X201) is used as the reference one of RTR6285 and PM7540 internal VCO. Schematic of the Crystal Part (19.2MHz) LGE Internal Use Only - 94 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 94: Only For Training And Service Purposes
2.4V ≥ Voltage ≥ 0.4V Check MSM6280 Check TP3 Check soldering and 19.2 MHz Signal components TCXO is OK Copyright © 2009 LG Electronics. Inc. All right reserved. - 95 - LGE Internal Use Only Only for training and service purposes...
Page 95: Checking Front End Module (Fem) Block
4. TROUBLE SHOOTING 1.TROUBLE SHOOTING 4.4 Checking Front End Module (FEM) Block Ant_SEL3 Ant_SEL2 Ant_SEL0 Ant_SEL1 VBAT LGE Internal Use Only - 96 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 96: Only For Training And Service Purposes
4. TROUBLE SHOOTING 1.TROUBLE SHOOTING Schematic of the Antenna Switch Block Copyright © 2009 LG Electronics. Inc. All right reserved. - 97 - LGE Internal Use Only Only for training and service purposes...
Page 97: Only For Training And Service Purposes
1 .2 V < Voltage < 3 V Check TP 1 VBATT Check the TP1 (VBAT) Check the Logic In each mode LGE Internal Use Only - 98 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 98: Checking Wcdma Block
4. TROUBLE SHOOTING 1.TROUBLE SHOOTING 4.5 Checking WCDMA Block Copyright © 2009 LG Electronics. Inc. All right reserved. - 99 - LGE Internal Use Only Only for training and service purposes...
Page 99: Only For Training And Service Purposes
Refer to 4.3 4.5.2. Checking FEM Block (SKY77521) Refer to 4.4 4.5.3. Checking RF TX Level Test Point (TX Level) LGE Internal Use Only - 100 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 100: Only For Training And Service Purposes
4. TROUBLE SHOOTING I I I Copyright © 2009 LG Electronics. Inc. All right reserved. - 101 - LGE Internal Use Only Only for training and service purposes...
Page 101: Only For Training And Service Purposes
RTR6285 Maximum output Power = 7 dBm RTR6285 minimum output Power = -80 dBm PAM(ACPM-7381) = Maximum input Power = 10 dBm LGE Internal Use Only - 102 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 102: Only For Training And Service Purposes
PA_ON( WCDMA_900_ON(C195), WCDMA_1900_ON(C228) and : PAM Enable WCDMA_2100_ON(C112)) PA_R0: PAM Gain Control PA_ON must be HIGH (over 2.6V). Copyright © 2009 LG Electronics. Inc. All right reserved. - 103 - LGE Internal Use Only Only for training and service purposes...
Page 103: Only For Training And Service Purposes
C220): Low), PAM OUT power must be over 21 dBm PAM IN power must be under 10 dBm LGE Internal Use Only - 104 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 105: Only For Training And Service Purposes
Check MSM7200A Check MSM6280 PA_R0 ≥ 2.6 V Check TP1 Check RTR6285 Over 10 dBm? Change the board LGE Internal Use Only - 106 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 106: Only For Training And Service Purposes
4. TROUBLE SHOOTING 1.TROUBLE SHOOTING 4.5.5. Checking RF Rx Level Bias Test Point (RF Rx Level) Copyright © 2009 LG Electronics. Inc. All right reserved. - 107 - LGE Internal Use Only Only for training and service purposes...
Page 108: Only For Training And Service Purposes
4. TROUBLE SHOOTING I I I Bias Copyright © 2009 LG Electronics. Inc. All right reserved. - 109 - LGE Internal Use Only Only for training and service purposes...
Page 109: Only For Training And Service Purposes
Check Duplexer Signal exist ? Check TP4 Check RTR6285 and Signal exist ? Rx SAW filter Change the board LGE Internal Use Only - 110 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 110: Checking Gsm Block
2. Check ANT.SW Module VBAT Step 2, 3 3. Check RF TRX Level 4. Re-download SW & Cal. Copyright © 2009 LG Electronics. Inc. All right reserved. - 111 - LGE Internal Use Only Only for training and service purposes...
Page 111: Checking Fem Block
4.6.1. Checking TCXO Block Refer to 4.3 4.6.2. Checking FEM Block Refer to 4.4 4.6.3.1. Checking RF TX level LGE Internal Use Only - 112 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 112: Only For Training And Service Purposes
4. TROUBLE SHOOTING 1.TROUBLE SHOOTING Schematic of GSM/DCS/PCS Tx Block Copyright © 2009 LG Electronics. Inc. All right reserved. - 113 - LGE Internal Use Only Only for training and service purposes...
Page 113: Only For Training And Service Purposes
If DCS/PCS(TP3) under 6 dBm ? No Problem Check soldering and Check RTR & PAD components Still exist Problem Change the board LGE Internal Use Only - 114 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 114: Only For Training And Service Purposes
4. TROUBLE SHOOTING 1.TROUBLE SHOOTING 4.6.3.2. Checking RF Rx Block Copyright © 2009 LG Electronics. Inc. All right reserved. - 115 - LGE Internal Use Only Only for training and service purposes...
Page 115: Only For Training And Service Purposes
4. TROUBLE SHOOTING 1.TROUBLE SHOOTING Schematic of GSM/DCS/PCS Rx Block Check FEM Block Refer 1.4 LGE Internal Use Only - 116 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 116: Power On Troubleshooting
X401 : 32.768Khz Check an U201 SMT status by X-ray Exchange U201 or Change the Main board And Retest Copyright © 2009 LG Electronics. Inc. All right reserved. - 117 - LGE Internal Use Only Only for training and service purposes...
Page 117: Only For Training And Service Purposes
C418 : VMSME_1.8V C421 : VMSMC1_1.2V C423 : VMSMC2_1.2V D402 : PS_HOLD [ GM750 Main PCB Bottom ] LGE Internal Use Only - 118 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 118: Charger Troubleshooting
- Charging current path - Check the OVP Circuit - Battery - Check the charging current Path - Check the battery Copyright © 2009 LG Electronics. Inc. All right reserved. - 119 - LGE Internal Use Only Only for training and service purposes...
Page 119: Only For Training And Service Purposes
Check an U201 SMT status by X-ray Exchange U201 or Change the Main board And Retest [ Charger Troubleshooting Flow ] LGE Internal Use Only - 120 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 120: Only For Training And Service Purposes
4. Troubleshooting R425 Q401 FL401 U404 CN401 : u-USB CN401 : u-USB U404 FL401 [ Charging part ] Copyright © 2009 LG Electronics. Inc. All right reserved. - 121 - LGE Internal Use Only Only for training and service purposes...
Page 121: Usb Trouble
VREG_USB_1.8V is about Check U403 to 1.8 (C456)V? Check U402 USB_DM/DP signal is out? Change the Main board LGE Internal Use Only - 122 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 122: Only For Training And Service Purposes
MUIC I2C U404 CN401 FL401 C445 IC401 IC401 MUIC I2C U402 U402 C456 High Speed USB Tranceiver C456 Copyright © 2009 LG Electronics. Inc. All right reserved. - 123 - LGE Internal Use Only Only for training and service purposes...
Page 123: Audio Trouble
The sine wave appear Change the Main board at Speaker Solder pads? Check the IC501 Can you hear the tone? LGE Internal Use Only - 124 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 125: Troubleshooting
4. TROUBLE SHOOTING 4. Troubleshooting R531, IC501 R519 Speaker Solder Pads R519, R531 LGE Internal Use Only - 126 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 126 C404, C449 ? Can you hear the tone Check the CN401 or sound? or change the Main b’d Copyright © 2009 LG Electronics. Inc. All right reserved. - 127 - LGE Internal Use Only Only for training and service purposes...
Page 128 4. TROUBLE SHOOTING 4. Troubleshooting CN401 C515, C516 C404, C449 IC501 C515, C516 output C404, C449 output Copyright © 2009 LG Electronics. Inc. All right reserved. - 129 - LGE Internal Use Only Only for training and service purposes...
Page 129 The sine wave appear at Check IC501 pads of speaker? Can you hear the tone? Change the speaker LGE Internal Use Only - 130 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 130 4. TROUBLE SHOOTING 4. Troubleshooting C513, 514 IC501 Speaker Solder Pads C513, C514 output Copyright © 2009 LG Electronics. Inc. All right reserved. - 131 - LGE Internal Use Only Only for training and service purposes...
Page 131 MIC Can you scoping some Change the MIC sound signal at C249,C250? Work well? LGE Internal Use Only - 132 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 132 4. Troubleshooting Main MIC (MIC501) C249 C250 FB506 C254 In case input the 1kHz tone to MIC C249, C250 Copyright © 2009 LG Electronics. Inc. All right reserved. - 133 - LGE Internal Use Only Only for training and service purposes...
Page 133 Interrupt which are the signal of Headset detecting arise in MUIC(Max14526) MAX14526 B1 (RES) : 2.3V(MIC BIAS) MIC signal MSM7200A [MSM7200A] [IC401(MAX14526)] LGE Internal Use Only - 134 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 134 Can you scoping Check the IC401 or Some sound signal Change the Main B’d at FB401,C252? Work well? Copyright © 2009 LG Electronics. Inc. All right reserved. - 135 - LGE Internal Use Only Only for training and service purposes...
Page 135 4. TROUBLE SHOOTING IC401 (MUIC) FB401(MIC Signal) R412 (HS_mic_bias) C252(HS_Mic) In case input the 1kHz tone to MIC C252 LGE Internal Use Only - 136 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 136: Camera Trouble
Check the EMI/ESD filter (FL101) Change the camera Change the Filter (FL101) Camera is OK Change the Sub board Copyright © 2009 LG Electronics. Inc. All right reserved. - 137 - LGE Internal Use Only Only for training and service purposes...
Page 137 48MHz Pixel Clock from ISP (FB105) (R108) 5MCAM_RESET_N (D103) CAM_DVDD_1.8V (C113) 24MHz Master Clock from ISP (D102) PM_CAM_AF_2.8V, (FB104) CAM_AVDD_2.8V (FB103) LGE Internal Use Only - 138 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 138 PM_CAM_AF_2.8V, (C115) 5MCAM_RESET_N CAM_IOVDD_2.8V (D103) (C124) 24MHz Master Clock from ISP (C121) 48MHz Pixel Clock from ISP (R108) Copyright © 2009 LG Electronics. Inc. All right reserved. - 139 - LGE Internal Use Only Only for training and service purposes...
Page 139: Vga Camera Trouble
(FL201, FL202, FL203) Change the camera Change the Filter (FL201, FL202, FL203) Camera is OK Change the Sub board LGE Internal Use Only - 140 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 140 4. TROUBLE SHOOTING 4. Troubleshooting 19.2MHz Pixel Clock (FL603) Copyright © 2009 LG Electronics. Inc. All right reserved. - 141 - LGE Internal Use Only Only for training and service purposes...
Page 141 4. TROUBLE SHOOTING 4. Troubleshooting VGA_RESET_N (D605) VGA_DVDD_1.8V VGA_AVDD_2.8V, (C603) VGA_IOVDD_2.8V (C602,C604) LGE Internal Use Only - 142 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 142 4. TROUBLE SHOOTING VGA_AVDD_2.8V, VGA_DVDD_1.8V VGA_IOVDD_2.8V (C603) (C604,C602) VGA_RESET_N (D605) 19.2MHz Pixel Clock (FL603) Copyright © 2009 LG Electronics. Inc. All right reserved. - 143 - LGE Internal Use Only Only for training and service purposes...
Page 143: Main Lcd Trouble
VREG_LCD_2.8V, VREG_MSME_1.8V LCD_RESET_N in Main BD Change the Main BD Display OK? Change the LCD module The LCD works LGE Internal Use Only - 144 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 144 4. TROUBLE SHOOTING CONNECTOR (CN504) VREG_LCD_2.8V (C530) LCD_RESET_N (FL501 PIN #3) VREG_MSME_1.8V (C529) Copyright © 2009 LG Electronics. Inc. All right reserved. - 145 - LGE Internal Use Only Only for training and service purposes...
Page 145: Sim Detect Troubleshooting
Work well? VRUIM_3.0V Check J601 is 2.85V? SIM_CLK is run? Change SIM card Work well? Change the Main board LGE Internal Use Only - 146 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 146 4. TROUBLE SHOOTING VREG_RUIM_3.0V SIM_RST SIM_CLK SIM_IO VREG_RUIM_3.0V SIM_RS SIM_CLK SIM_IO (VA602) (VA601) (VA604 (VA603) Figure .USIM part schematics Copyright © 2009 LG Electronics. Inc. All right reserved. - 147 - LGE Internal Use Only Only for training and service purposes...
Page 147: Keypad Backlight Troubleshooting
Check an U201 SMT status by X-ray Exchange U201 or Change the Main board And Retest VPWR KPD_DRV_N LGE Internal Use Only - 148 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 148: Linear Motor
_3.0V is 3V? LIN_ MOTOR_EN is high? LIN_MOTOR_PWN is work? MOTOR- MOTOR+ Check an U505 SMT status by X-ray MOTOR- MOTOR+ Copyright © 2009 LG Electronics. Inc. All right reserved. - 149 - LGE Internal Use Only Only for training and service purposes...
Page 149: Proximity Sensor On/Off Trouble
Change the MAIN Board R522 VREG_PROXI_2.6V Change the sensor U501 PROX_OUT U501 Work well? Change the Main Board LGE Internal Use Only - 150 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 150 4. TROUBLE SHOOTING 4. Troubleshooting U501 PROX_OUT VREG_PROXI_2.6V Copyright © 2009 LG Electronics. Inc. All right reserved. - 151 - LGE Internal Use Only Only for training and service purposes...
Page 151: Luminance Sensor On/Off Trouble
BL_I2C_SDA / SCL output Change the Luminance sensor U503 GC1 / 2 signal output U503 Change the Main Board Work well? LGE Internal Use Only - 152 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 152 -. BL_I2C_SDA / SCL : data / CLK pulse (R508, R509) -. U503 (GC1 / GC2) : data pulse VREG_MSMP_2.6V (C509) +VPWR (C505) BL_I2C_SCL (R508) BL_I2C_SDA (R509) Copyright © 2009 LG Electronics. Inc. All right reserved. - 153 - LGE Internal Use Only Only for training and service purposes...
Page 153: Motion Sensor On/Off Trouble
Change the Main Board MOTION_I2C_SDA / SCL Change the Motion sensor output U504 Work well? Change the Main Board LGE Internal Use Only - 154 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 154 -. MOTION_I2C_SDA / SCL : data / CLK pulse (R506, R507) MOTION_I2C_SDA (R506) MOTION_INT MOTION_I2C_SCL (R507) VREG_MSMP_2.6V (C507,C531) Copyright © 2009 LG Electronics. Inc. All right reserved. - 155 - LGE Internal Use Only Only for training and service purposes...
Page 167 5. Download Image Download (ROMcopy image) “ … ” “ ” f i t “ ” LGE Internal Use Only - 168 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 194: Bga Pin Map
8. BGA Pin Map 8. BGA Pin Map 201 (EUSY0344203) NOT USE Copyright © 2009 LG Electronics. Inc. All right reserved. - 195 - LGE Internal Use Only Only for training and service purposes...
Page 202: Pcb Layout
Service CN602 Optical Joystick Conn. Can not operate Optical Joystick. FL104(I)/FL112(II)/FL110(VIII) DuplexerWCDMA TX Power & RX SensitivityNo Service Copyright © 2009 LG Electronics. Inc. All right reserved. - 203 - LGE Internal Use Only Only for training and service purposes...
Page 203 U601 VGA Camera.Can not operation automatically. operate VGA Camera. MIC501 MIC.Can not record or send user voice. LGE Internal Use Only - 204 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 205 U202 Wi-Fi&BT&FM ModuleCan USIMCan not operate Camera not use WLAN Service, BT andFM Radio Function LGE Internal Use Only - 206 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 210: Calibration
1.2 Description of basic folders 1.3 Description of configuration files How to use Tachyon 2.1 Model selection 2.2 Start cal & auto Copyright © 2009 LG Electronics. Inc. All right reserved. - 211 - LGE Internal Use Only Only for training and service purposes...
Page 212 It consists of default values. ‘MODEL NAME’_NV.INI It is written when ‘cal&auto’ is begun. ‘MODEL NAME’_Sequence.XML It is described a testing procedures. Copyright © 2009 LG Electronics. Inc. All right reserved. - 213 - LGE Internal Use Only Only for training and service purposes...
Page 213: How To Use Tachyon
Click the icon, in tool bar. Then, you can see the below screen b. Select the chipset “Qualcomm” LGE Internal Use Only - 214 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 214 Select the model You should select “GM750” d. Select the buyer (must be double clicked) e. Click select button Copyright © 2009 LG Electronics. Inc. All right reserved. - 215 - LGE Internal Use Only Only for training and service purposes...
Page 215 - Test command send. 2) Calibration 3) Auto test 4) After action - Phone reset - Change UE to AMSS LGE Internal Use Only - 216 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 226: Exploded View & Replacement Part List
12. EXPLODED VIEW & REPLACEMENT PART LIST 12.1 EXPLODED VIEW 57 58 Copyright © 2009 LG Electronics. Inc. All right reserved. - 227 - LGE Internal Use Only Only for training and service purposes...
Page 228: Replacement Parts
PAD,CONNECTOR MPBU0085101 COMPLEX, (empty), , , , , BLACK MPBZ00 MPBZ0252601 COMPLEX, (empty), , , , , BLACK Copyright © 2009 LG Electronics. Inc. All right reserved. - 229 - LGE Internal Use Only Only for training and service purposes...
Page 229 PRESS, STS, , , , , COLOR WITHOUT MIDZ00 INSULATOR MIDZ0242001 COMPLEX, (empty), , , , , COLOR LGE Internal Use Only - 230 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 230 BLACK MLAB00 LABEL,A/S MLAB0001102 C2000 USASV DIA 4.0 WHITE MPBZ00 MPBZ0252701 COMPLEX, (empty), , , , , BLACK Copyright © 2009 LG Electronics. Inc. All right reserved. - 231 - LGE Internal Use Only Only for training and service purposes...
Page 231 LABEL MLAZ0038301 PID Label 4 Array COLOR WITHOUT SC601 CAN,SHIELD MCBA0056801 PRESS, NS, , , , , COLOR LGE Internal Use Only - 232 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 232: Main Component
ECCH0000198 2.2 uF,6.3V ,M ,X5R ,TC ,1005 ,R/TP C115 CAP,CERAMIC,CHIP ECCH0000198 2.2 uF,6.3V ,M ,X5R ,TC ,1005 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. - 233 - LGE Internal Use Only Only for training and service purposes...
Page 233 10 ohm,1005 ,Ferrite Bead FB104 FILTER,BEAD,CHIP SFBH0007102 10 ohm,1005 ,Ferrite Bead FB201 FILTER,BEAD,CHIP SFBH0007102 10 ohm,1005 ,Ferrite Bead LGE Internal Use Only - 234 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 234 ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP C123 CAP,CHIP,MAKER ECZH0001215 1 uF,10V ,K ,X5R ,TC ,1005 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. - 235 - LGE Internal Use Only Only for training and service purposes...
Page 235 10000000 pF,6.3V ,M ,X5R ,TC ,1608 ,R/TP , , ,[empty] C102 CAP,CERAMIC,CHIP ECCH0005604 ,[empty] ,[empty] ,[empty] ,[empty] ,[empty] ,0.8 mm LGE Internal Use Only - 236 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 236 0.1 uF,6.3V ,K ,B ,HD ,1005 ,R/TP , , ,[empty] ,[empty] C132 CAP,CERAMIC,CHIP ECCH0002001 ,[empty] ,[empty] ,[empty] ,[empty] ,.5 mm Copyright © 2009 LG Electronics. Inc. All right reserved. - 237 - LGE Internal Use Only Only for training and service purposes...
Page 237 ECZH0000830 33 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP C162 CAP,CHIP,MAKER ECZH0000813 100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP LGE Internal Use Only - 238 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 238 ECZH0000813 100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP C198 CAP,CHIP,MAKER ECZH0000813 100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. - 239 - LGE Internal Use Only Only for training and service purposes...
Page 239 3.9 pF,50V ,C ,NP0 ,TC ,1005 ,R/TP C230 CAP,CERAMIC,CHIP ECCH0000115 22 pF,50V,J,NP0,TC,1005,R/TP C231 CAP,CHIP,MAKER ECZH0000813 100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP LGE Internal Use Only - 240 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 240 10000000 pF,6.3V ,M ,X5R ,TC ,1608 ,R/TP , , ,[empty] C303 CAP,CERAMIC,CHIP ECCH0005604 ,[empty] ,[empty] ,[empty] ,[empty] ,[empty] ,0.8 mm Copyright © 2009 LG Electronics. Inc. All right reserved. - 241 - LGE Internal Use Only Only for training and service purposes...
Page 241 ECCH0005604 ,[empty] ,[empty] ,[empty] ,[empty] ,[empty] ,0.8 mm C334 CAP,CERAMIC,CHIP ECCH0000155 10 nF,16V,K,X7R,HD,1005,R/TP C335 CAP,CERAMIC,CHIP ECCH0000143 1 nF,50V,K,X7R,HD,1005,R/TP LGE Internal Use Only - 242 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 242 ECZH0001215 1 uF,10V ,K ,X5R ,TC ,1005 ,R/TP C421 CAP,CERAMIC,CHIP ECCH0006201 4.7 uF,6.3V ,K ,X5R ,TC ,1608 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. - 243 - LGE Internal Use Only Only for training and service purposes...
Page 243 ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP C455 CAP,CHIP,MAKER ECZH0003103 0.1 uF,10V ,K ,X7R ,HD ,1005 ,R/TP LGE Internal Use Only - 244 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 244 ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP C518 CAP,CERAMIC,CHIP ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. - 245 - LGE Internal Use Only Only for training and service purposes...
Page 245 ESC ,30 V,100 mA,R/TP ,SWITCH DIODE D203 DIODE,TVS EDTY0008606 DFN-2 ,7.82 V,150 mW,R/TP ,PB-FREE D401 DIODE,TVS EDTY0008606 DFN-2 ,7.82 V,150 mW,R/TP ,PB-FREE LGE Internal Use Only - 246 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 246 1.2, 5pin, U-U, 50-50, GPS HIGH ATTEN. ,; ,1575.42 ,1.4*1.1*0.4 ,SMD ,R/TP FL108 FILTER,SAW SFSY0024303 1960 MHz,1.4*1.1*0.6 ,SMD ,5pin, Unbal-Bal, 50//150 Copyright © 2009 LG Electronics. Inc. All right reserved. - 247 - LGE Internal Use Only Only for training and service purposes...
Page 247 6.8 nH,J ,1005 ,R/TP ,PBFREE L115 INDUCTOR,CHIP ELCH0001048 10 nH,J ,1005 ,R/TP ,PBFREE L116 INDUCTOR,CHIP ELCH0004707 1.5 nH,S ,1005 ,R/TP , LGE Internal Use Only - 248 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 248 Q501 TR,FET,N-CHANNEL EQFN0005601 ESM ,100 mW,30 V,100 mA,R/TP , Q502 TR,FET,N-CHANNEL EQFN0005601 ESM ,100 mW,30 V,100 mA,R/TP , Copyright © 2009 LG Electronics. Inc. All right reserved. - 249 - LGE Internal Use Only Only for training and service purposes...
Page 249 1 Kohm,1/16W ,J ,1005 ,R/TP R210 RES,CHIP,MAKER ERHZ0000405 10 Kohm,1/16W ,J ,1005 ,R/TP R212 RES,CHIP,MAKER ERHZ0000405 10 Kohm,1/16W ,J ,1005 ,R/TP LGE Internal Use Only - 250 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 250 12 Kohm,1/16W ,F ,1005 ,R/TP R418 RES,CHIP ERHY0000241 1K ohm,1/16W,J,1005,R/TP R419 RES,CHIP,MAKER ERHZ0000318 80.6 Kohm,1/16W ,F ,1005 ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. - 251 - LGE Internal Use Only Only for training and service purposes...
Page 251 100 Kohm,1/20W(0.05W) ,J ,0603 ,R/TP R529 RES,CHIP ERHY0009506 100 Kohm,1/20W(0.05W) ,J ,0603 ,R/TP R530 RES,CHIP ERHY0003501 220 ohm,1/16W ,J ,1005 ,R/TP LGE Internal Use Only - 252 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 252 MHz, MHz, ,Tx Module(ASM + PAM) - WCDMA TriMode 20.5 dB,0.22 dB,34 dB,1.0*0.5*0.4 ,SMD COUPLER,RF U108 SCDY0004301 ,Pb_free_KPCS+USPCS+WCDMA ,; ,[empty] ,1865MHz DIRECTIONAL ,230MHz ,SMD ,R/TP Copyright © 2009 LG Electronics. Inc. All right reserved. - 253 - LGE Internal Use Only Only for training and service purposes...
Page 253 5.5 V, ,SMD ,1005, 50pF VA599 VARISTOR SEVY0005201 5.5 V, ,SMD ,1005, 50pF VA601 VARISTOR SEVY0005201 5.5 V, ,SMD ,1005, 50pF LGE Internal Use Only - 254 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 254 10 ohm,1/20W(0.05W) ,J ,0603 ,R/TP U501 EUSY0376201 ,8 ,R/TP , ,; ,IC,PMIC U503 EUSY0388201 WSOF6 ,5 ,R/TP ,1.6*1.6 ,; ,IC,PMIC Copyright © 2009 LG Electronics. Inc. All right reserved. - 255 - LGE Internal Use Only Only for training and service purposes...
Page 255 12. EXPLODED VIEW & REPLACEMENT PART LIST Location Level Description Part Number Spec Color Remark U601 CAMERA SVCY0019901 CMOS ,VGA ,Toshiba(1/10"), 4x4x2.23t, Reflow Type LGE Internal Use Only - 256 - Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 256: Accessory
100-240V ,5060 Hz,4.8 V,1 A,CE ,UK, Cableless ,; SSAD00 ADAPTOR,AC-DC SSAD0035001 ,90Vac~264Vac ,4.8Vdc ,1A ,5060 , ,WALL 2P ,USB , Copyright © 2009 LG Electronics. Inc. All right reserved. - 257 - LGE Internal Use Only Only for training and service purposes...

LG GM750 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 Calibration

11 Test Mode

12 Exploded View & Replacement Part List

Quick Links

Troubleshooting

Related Manuals for LG GM750

Summary of Contents for LG GM750