LG MG370 Service Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. Cell Phone
  5. MG370
  6. Service manual
LG MG370 Service Manual

LG MG370 Service Manual

Lg cell phone service manual
Hide thumbs
Table of Contents

Advertisement

Quick Links

Internal Use Only
Service Manual
MG370/KG370
Date: October, 2007 / Issue 1.0

Advertisement

Table of Contents
loading

Related Manuals for LG MG370

Summary of Contents for LG MG370

  • Page 1 Internal Use Only Service Manual MG370/KG370 Date: October, 2007 / Issue 1.0...
  • Page 2 LGE Inc. Furthermore, LGE Inc. reserves the right, without notice, to make changes to equipment design as advances in engineering and manufacturing methods warrant. This manual provides the information necessary to install, program, operate and maintain the MG370. Copyright © 2007 LG Electronics. Inc. All right reserved.
  • Page 3 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 2 - Only for training and service purposes...

  • Page 4: Table Of Contents

    4.3 Charging Trouble ........47 4.4 Vibrator Trouble ........49 4.5 SIM Card Trouble........51 4.6 KEY backlight Trouble ......53 4.7 RTC Trouble ..........54 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 3 - Only for training and service purposes...

  • Page 5: Only For Training And Service Purposes

    LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 4 - Only for training and service purposes...

  • Page 6: 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 MG370 or compatibility with the network, 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 7: Only For Training And Service Purposes

    1. INTRODUCTION E. Notice of Radiated Emissions The MG370 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.

  • Page 8: Abbreviation

    Low Drop Output Light Emitting Diode OPLL Offset Phase Locked Loop Power Amplifier Module Printed Circuit Board Programmable Gain Amplifier Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 7 - Only for training and service purposes...

  • Page 9: Only For Training And Service Purposes

    Time Division Multiple Access UART Universal Asynchronous Receiver/Transmitter Voltage Controlled Oscillator VCTCXO Voltage Control Temperature Compensated Crystal Oscillator Wireless Application Protocol LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 8 - Only for training and service purposes...

  • Page 10: Performance

    SMS : Yes 2.3 Main Parts: GSM Solution Item Part Name Comment Digital Baseband EGOLD voice (PMB7880) RF Chip SKY77318 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 9 - Only for training and service purposes...

  • Page 11: H/W Features

    4 Key Navigation Keypad Total Number of Keys : 22 with Confirm key, F1, F2, SND, END/PWR, Clear LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 10 - Only for training and service purposes...

  • Page 12: Only For Training And Service Purposes

    Design Market Europe Asia / CIS America America Without KG375 FM Radio With KG370 MG370b MG370a FM Radio Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 11 - Only for training and service purposes...

  • Page 13: Only For Training And Service Purposes

    Search Number/Name Name only Group Fixed Dial Number Service Dial Number Own Number 30sec Voice Memo Call Remainder Network Selection LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 12 - Only for training and service purposes...

  • Page 14: Only For Training And Service Purposes

    SIM Lock Operator Dependent Class 1, 2, 3 SIM Toolkit CPHS Hold / Retrieve Conference Call Max. 6 DTMF Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 13 - Only for training and service purposes...

  • Page 15: Technical Brief

    3. TECHNICAL BRIEF 3. TECHNICAL BRIEF 3.1 Digital Main Processor(PMB7880) Figure. 3-1 PMB7880 FUNCTIONAL BLOCK DIAGRAM LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 14 - Only for training and service purposes...

  • Page 16: Only For Training And Service Purposes

    The E-GOLD voice is powered by the C166®S MCU and TEAKLite® DSP cores. The operating temperature range from -40˚C to 85˚C. It is manufactured using the 0.13 µm CMOS process. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...

  • Page 17: Only For Training And Service Purposes

    • Fully integrated RF VCO. ] Crystal Oscillator • Fully digital controlled crystal oscillator core with a highly linear tuning characteristic. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 16 - Only for training and service purposes...

  • Page 18: Only For Training And Service Purposes

    • System start up circuitry • Charger circuitry for NiCd, NiMh and LiIon cells • Integrated regulators for direct connection to battery. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 17 - Only for training and service purposes...

  • Page 19: Only For Training And Service Purposes

    11 bits). For baseband operation, the E-GOLD voice supports: • Making or receiving a voice call • Sending or receiving an SMS. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 18 - Only for training and service purposes...

  • Page 20: Only For Training And Service Purposes

    The E-GOLD voice includes a multi-core debug. The C166 and TEAKlite cores can be debugged in parallel with: • A single JTAG port (that is, on a single host) • Mutual breakpoint control. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 19 - Only for training and service purposes...

  • Page 21: Only For Training And Service Purposes

    • Flash programming makes use of the E-GOLD voice ID for personalization checks with IMEI and SIM-lock protection LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 20 - Only for training and service purposes...

  • Page 22: Only For Training And Service Purposes

    RX Power (dBm) 5->4 -88dBm~ -84dBm 4->3 -93dBm~ -89dBm Antenna display 3->2 -98dBm~ -94dBm 2->1 -103dBm~ -99dBm 1->0 -107dBm~ -103dBm Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 21 - Only for training and service purposes...

  • Page 23: Power Amplifier Module (Sky77318)

    GSM (logic 0) or DCS/PCS (logic 1) as determined from the Band Select (BS) signal. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 22 - Only for training and service purposes...

  • Page 24: Only For Training And Service Purposes

    ) function, which is insensitive to variations in temperature, power supply, process, and input power. The ENABLE input allows initial turn-on of PAM circuitry to minimize battery drain. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 23 -...

  • Page 25: 26 Mhz Clock (Dcxo)

    Then the required AFC compensation is sent to the LUXO (Lineari-Zation Unit of Crystal Oscillator), which in turns control the DCXO core and generates the 26MHz system clock. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 24 - Only for training and service purposes...

  • Page 26: Rtc(32.768Khz Crystal)

    The module RTC Shell solely performs level translation of the 32KHz clock to the VDD_LD1 power supply domain, and is not functionally associated with the RTC. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 25 -...

  • Page 27: Lcd Interface(3-Wire Spi Interface)

    C202 0.1u C203 C205 MLED W_LED_EN EN_SET MLED1 MLED2 R210 C217 100K 2.2u Figure 3-5-2. Charge pump interface LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 26 - Only for training and service purposes...

  • Page 28: Only For Training And Service Purposes

    Data Output (mA/Ch) Data Output (mA/Ch) 20.0 17.0 14.0 12.0 10.0 0.05 Figure 3-5-3. Charge pump Output Current Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 27 - Only for training and service purposes...

  • Page 29: Sim Card Interface

    This signal makes SIM card to HW default status. SIM_CLK This signal is transferred to SIM card. SIM_DATA This signal is interface datum. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 28 - Only for training and service purposes...

  • Page 30: Keypad Interface

    • To set the keypad to a 5x5 scan matrix (5 input and 5 output pins) The scan mode should be determined at the very beginning of the system start because changes are not allowed later. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 29 -...

  • Page 31: Battery Charging Block Interface

    The ISL6294 has four basic modes for the battery charge cycle: pre-conditioning/trickle charge; constant current/fast charge; constant voltage; and end of charge. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 30 - Only for training and service purposes...

  • Page 32: Rf Interface

    An integrated, selfaligning, low-pass filter ensures the receivers to function under blocking and reference interference conditions and avoids aliasing by baseband sampling. An automatic DC-offset compensation is implemented and can beswitched depending on the gain setting. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 31 -...

  • Page 33: Only For Training And Service Purposes

    (multi modulus divider) at a sample rate of 26MHz. Thus a tightly controlled frequency modulation of the VCO is achieved. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 32 - Only for training and service purposes...

  • Page 34: Audio Interface

    The audio front-end itself can be considered to be organized in three sub-blocks: • Interface to processor cores (TEAKlite and - indirectly - C166S) • Digital filters • Analog part. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 33 - Only for training and service purposes...

  • Page 35: Only For Training And Service Purposes

    Main Microphone Negative signal(Differential signal) MICP2 Headset Microphone Positive signal(Differential signal) MICN2 Headset Microphone Negative signal(Differential signal) VMIC Main/Headset Microphone supply power LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 34 - Only for training and service purposes...

  • Page 36: Only For Training And Service Purposes

    OUTA SPK_N SPK_AMP_EN BYPASS C119 R114 330p C126 C127 R117 100K 0.47u 2.2u Figure 3-10-3 Main Speaker interface Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 35 - Only for training and service purposes...

  • Page 37: Only For Training And Service Purposes

    MLED1 HS_MMI_R R207 MLED2 R208 R209 HS_DETECT R211 RPWRON R212 R213 R214 CN201 FM_ANT Figure 3-10-5 Headset interface LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 36 - Only for training and service purposes...

  • Page 38: Key Led Interface

    This handset has 8 LEDs that illuminates blue color. Control signal is controlled by E-Gold-voice with PWM and handset has 3 methods, ON, OFF and dimming. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 37 -...

  • Page 39: Vibrator Interface

    C241 Q200 0.1u Figure 3-12 Vibrator interface This handset has vibrator operation. VIBRATOR_EN signal is controlled by E-Gold-voice LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 38 - Only for training and service purposes...

  • Page 40: Memory Interface

    Up to 3 external CS signals can be generated to save external glue logic. Access to very slow memories is supported via a special ‘Ready’ function. The system MCU clock is set to run with 26Mhz. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 39 -...

  • Page 41: Power Block Interface

    After system start up several methods are implemented for active and idle power saving. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 40 - Only for training and service purposes...

  • Page 42: Only For Training And Service Purposes

    • Internal reset of the baseband, including silent reset. • Tri-state function of the baseband module. • Standby mode controlled by VCXO_EN provided by SCCU module. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 41 -...

  • Page 43: Mg370A, Mg370B,Kg370,Kg375 Function Difference

    KG375 FM Radio With KG370 MG370b MG370a FM Radio < Internal Antenna > MG370a MG370b , KG370, KG375 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 42 - Only for training and service purposes...

  • Page 44: Bom Difference

    Antenna matching L403 : ECZH0000813 (100pF) L403 : ELCH0004726 (1.5nH) L400 : ELCH0001031 (15nH) L400 : ELCH0004711 (22nH) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 43 - Only for training and service purposes...

  • Page 45: 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 Copyright © 2007 LG Electronics. Inc. All right reserved. - 44 - Only for training and service purposes...

  • Page 46: Power On Trouble

    FB100 C100 C102 C103 C101 C104 C105 C107 C108 C106 4.7u C109 2.2u 0.1u R100 C110 220n REXT Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 45 - Only for training and service purposes...

  • Page 47: Only For Training And Service Purposes

    The LDO outputs at U103 Check the clock signal on X100 Replace U103 32.768KHz/0.5V THE PHONE WILL POWER ON. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 46 - Only for training and service purposes...

  • Page 48: Charging Trouble

    1.8K _PPR IREF _EOC _CHG IMIN PGND R223 R224 R225 R222 C233 C234 100K 1 uF 0.1u 240K Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 47 - Only for training and service purposes...

  • Page 49: Only For Training And Service Purposes

    U201 Is 0V The battery may have Battery is charged? problems. Change the battery. Charging is properly operating LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 48 - Only for training and service purposes...

  • Page 50: Vibrator Trouble

    -Tr is working correctly CIRCUIT VBAT R226 Q2_C Q2_E MOTOR_P Q2_B Q1_B VIBRATOR_EN C236 Q1_E Q1_C C241 Q200 0.1u Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 49 - Only for training and service purposes...

  • Page 51: Only For Training And Service Purposes

    CN200 ? Check the connection Reconnect vibrator vibrator ? Replace vibrator Vibrator Working well ! LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 50 - Only for training and service purposes...

  • Page 52: Sim Card Trouble

    CIRCUIT 2V85_VSIM 2V85_VSIM J100 R113 GND1 4.7K SIM_RST SIM_DATA SIM_CLK GND5 GND2 C124 C125 C123 GND4 GND3 0.1u Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 51 - Only for training and service purposes...

  • Page 53: Only For Training And Service Purposes

    Change the U103 Does it work Does it work Properly? Properly? SIM Card will be detected. Change SIM Card LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 52 - Only for training and service purposes...

  • Page 54: Key Backlight Trouble

    Check the soldering Working? each R and LED R120~R129 LD100~LD109 Replace or re-soldering Backlight will work properly. component Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 53 - Only for training and service purposes...

  • Page 55: Rtc Trouble

    FM RADIO EN CHECKING FLOW START Is the frequency about 32Khz Replace X101 and try again. RTC will work properly LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 54 - Only for training and service purposes...

  • Page 56: Lcd Trouble

    INOUT_A5 INOUT_B5 A(7) INOUT_A4 INOUT_B4 SPK_RCV_N INOUT_A3 INOUT_B3 _LCD_CS INOUT_A2 INOUT_B2 LCD_RESET INOUT_A1 INOUT_B1 FL201 C221 ICVE31186E150R101FR 1000p Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 55 - Only for training and service purposes...
  • Page 57 Check the FL200, FL201 LCD data & command Does LCD work Replace LCD module properly ? LCD working well ! LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 56 - Only for training and service purposes...

  • Page 58: Speaker Trouble

    SPK_P C118 220n R110 SPK- OUTA SPK_N SPK_AMP_EN BYPASS R114 C119 330p R117 C126 C127 100K 0.47u 2.2u - 57 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 59 Check the Signal, Re-solder FPCB speaker solder Speaker wires Re-Assemble Check the Contact or Re-place Of CN200 Speaker Replace FPCB LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 58 - Only for training and service purposes...

  • Page 60: Receiver Trouble

    CHECKING FLOW Start Clear the Check the Contact contact ofCN200 Check Check the Signal, U103 R114, R112 Replace FPCB Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 59 - Only for training and service purposes...

  • Page 61: Headphone Trouble

    HS_MMI_L R298 C215 R206 MLED1 HS_MMI_R R207 MLED2 R208 R209 HS_DETECT R211 RPWRON R212 R213 R214 CN201 FM_ANT LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 60 - Only for training and service purposes...
  • Page 62 Does waveform at Re-solder causal CN201ís 4 and 5pin component fluctuate? Change another Ear-Mic set and Try again Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 61 - Only for training and service purposes...

  • Page 63: Microphone Trouble

    Re-solder or replace the microphone Is it about 1.2~1.5V DC with a few tens mV Microphone will work properly. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 62 - Only for training and service purposes...

  • Page 64: Rf Components

    PAM (Power Amp. Module) X100 DCXO (26MHz) FL401 ASM (Antenna Switch Module) SW400 Mobile Switch FL400 RX SAW Filter Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 63 - Only for training and service purposes...

  • Page 65: Rx Receiver Part

    Check point. U102 DCXO(X100) X100 Check point mobile SW & ASM & SAW Filter(SW400,F L400,FL401) Re-Download S/W & LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 64 - Only for training and service purposes...
  • Page 66 Pin 2 HOT2 3 GND2 1 HOT1 GND1 26MHz DCS_PCS_OUT Pin 1 GSM_OUT <DCXO Waveform> < DCXO Circuit> Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 65 - Only for training and service purposes...

  • Page 67: Rx Receiver Part

    Filter (FL400) Mobile SW & ASM is OK. See next page * FL400 6,7 and 8,9 output are balanced LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 66 - Only for training and service purposes...

  • Page 68: Tx Transmitter Part

    Check point PAM(U400) Control Signal Check ASM & Mobile S/W & SAW (FL401,SW400 ,FL400) Re-Download S/W & RF Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 67 - Only for training and service purposes...
  • Page 69 PAM Control Signal is OK. See next page to Vapc check Paon & BS ASM & Mobile SW Circuit. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 68 - Only for training and service purposes...
  • Page 70 GSM850_900TX C423 C424 GND2 GSM850_900RX GND3 LMSP2PAA-575TEMP Mode GSM850 TX PCS1900 TX GSM850 RX PCS1900 RX H(2.7V) H(2.7V) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 69 - Only for training and service purposes...
  • Page 71 OK ? Pin 3,7 Replace ASM Signal is (FL401) normal ? Mobile SW & ASM is Check Antenna. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 70 - Only for training and service purposes...

  • Page 72: Download

    Figure 5-1 describes Download setup UART (If you have battery, no TA is needed) Figure 5-1. Download Setup Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 71 - Only for training and service purposes...

  • Page 73: Download Process

    Setting(S) > Configuration : configuration download condition DLL, SW files and etc. About(H) > MultiGSM : Provide version information First, select Setting Menu. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 72 - Only for training and service purposes...
  • Page 74 : Select download speed You must 460800. System supports maximum 460800bps. : Select port select start and end port be operated Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 73 - Only for training and service purposes...
  • Page 75 5. DOWNLOAD 5.2.3. Download step[3] : Select files downloaded MG370 have 4 files, *.eep, *.fls, *.dffs and *.cust. But You must not select *.eep file. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 74 -...
  • Page 76 If configuration is finished, then push start button and then button is changed to STOP. Turn on power of multi download and connector phones. If download is started, then push start button else program will download repeatedly. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 75 -...
  • Page 77 5.2.5. Download step[5] : This region appears donwload status. If download is finished, PASS or FAIL.message is showed. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 76 - Only for training and service purposes...

  • Page 78: Block Diagram

    6. BLOCK DIAGRAM Char ger Det ect AU XI N AU X O U T UART 2. 8V V_MEM Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 77 - Only for training and service purposes...
  • Page 79 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 78 - Only for training and service purposes...

  • Page 80: Circuit Diagram

    KEY_UNLOCK URXD BAT100 R138 R139 C145 R137 UTXD TRIG_IN 390K 100K 1000p 100K TRIG_OUT LG(42)-A-5505-10:01 LG Electronics Inc. - 79 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 81 DOWN CLEAR 2V0_VRTC R231 KEY_OUT(0:4) R232 R233 R234 PWRON R235 C242 100p R236 R237 LGIC(42)-A-5505-10:01 LG Electronics Inc. - 80 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 82 (CURRENT MODE:30uA) ABSENT RADIO RADIO_DETECT RADIO R311 HS_MMI_R NO RADIO 2.7K HS_OUT R312 HS_MMI_L LG(42)-A-5505-10:01 LG Electronics Inc. - 81 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 83 (B9308 for 900 Band) 18nH C425 GSM_RXN MODE 850/900 TX 1800/1900 TX R408 DEFAULT_BANDSEL 850/900/1800/1900 RX LGIC(42)-A-5505-10:01 LG Electronics Inc. - 82 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 84: Bga Ic Pin Check

    A B C D E F G H J K L M N P R : Us ed : Not used Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 83 - Only for training and service purposes...
  • Page 85 8. BGA IC Pin Check <U100> K5L6331CAM-D270 5 6 7 : Us ed : Not us ed LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 84 - Only for training and service purposes...

  • Page 86: Pcb Layout

    9. PCB LAYOUT <Folder on/off SW> -Folder on/off operation - 85 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 87 -Check the TA and battery <Vibrator driver> -Check the vibrator operation <Key backlight SW> -Check all LEDs operation <Back-up battery> -RTC operation - 86 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 88: Calibration

    10. Calibration 10. Calibration 4.000V 0.0000A 10.1 Calibration Steps 10.1.1 Turn on the Phone. 10.1.2 Execute “HK_24.exe” Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 87 - Only for training and service purposes...
  • Page 89 10. Calibration 10.1.3 Click “SETTING” Menu 10.1.4 Setup “Ezlooks” menu such as the following figure LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 88 - Only for training and service purposes...
  • Page 90 1. By-Pass: not control by GPIB 2. Normal : control by GPIB Setup UART Port PWR : Power Supply CELL :Call-Test Equipment Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 89 - Only for training and service purposes...
  • Page 91 10. Calibration 10.1.7 Select “MODEL”. 10.1.8 Click “START” for RF calibration 10.1.9 RF Calibration finishes. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 90 - Only for training and service purposes...
  • Page 92 3. RF Calibration steps as follow: TX Channel compensation: GSM850->PCS RX Channel compensation: GSM850->PCS 4. Phone Operation Mode Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 91 - Only for training and service purposes...

  • Page 93: Stand-Alone Test

    3 Confirm EEPROM & Delta file prefix name 4 Click “Update Info” for communicating Phone and Test-Program. Not Connected LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 92 - Only for training and service purposes...
  • Page 94 “Reset” bar. 6 Select “Non signaling” in the Quick Bar menu. Then Standalone Test setup is finished. Change "ptest mood" Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 93 - Only for training and service purposes...

  • Page 95: Tx Test

    3 Select “Tx” in the RF mode menu and “PCL” in the PA Level menu. 4 Finally, Click “Write All” bar and try the efficiency test of Phone. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 94 - Only for training and service purposes...

  • Page 96: Rx Test

    4 The Phone must be changed “normal mode” after finishing Test. 5 Change the Phone to “normal mode” and then Click the “Reset” bar. Change "normal mode " Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 95 -...
  • Page 97 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 96 - Only for training and service purposes...

  • Page 98: Exploded View & Replacement Part List

    12. EXPLODED VIEW & REPLACEMENT PART LIST 12.1 EXPLODED VIEW - 97 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 99 ASS'Y EXPLODED VIEW - 98 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 100: Replacement Parts

    COMPLEX, (empty), , , , , Without Color I,24 MIDZ00 INSULATOR MIDZ0136901 COMPLEX, (empty), , , , , Without Color Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 99 - Only for training and service purposes...
  • Page 101 MLAZ0038301 PID Label 4 Array Without Color MCBA00 CAN,SHIELD MCBA0019001 PRESS, STS, 0.2, , , , Without Color LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 100 - Only for training and service purposes...
  • Page 102 Level Description Part Number Spec Color Remark MCBA01 CAN,SHIELD MCBA0021901 PRESS, STS, 0.2, , , , Without Color Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 101 - Only for training and service purposes...

  • Page 103: Main Component

    1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP C121 CAP,CERAMIC,CHIP ECCH0000113 18 pF,50V,J,NP0,TC,1005,R/TP C122 CAP,CERAMIC,CHIP ECCH0000113 18 pF,50V,J,NP0,TC,1005,R/TP C123 CAP,CERAMIC,CHIP ECCH0000115 22 pF,50V,J,NP0,TC,1005,R/TP LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 102 - Only for training and service purposes...
  • Page 104 27 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP C220 CAP,CERAMIC,CHIP ECCH0000182 0.1 uF,10V ,K ,X5R ,HD ,1005 ,R/TP C221 CAP,CERAMIC,CHIP ECCH0000143 1 nF,50V,K,X7R,HD,1005,R/TP Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 103 - Only for training and service purposes...
  • Page 105 ECCH0000155 10 nF,16V,K,X7R,HD,1005,R/TP C403 CAP,CHIP,MAKER ECZH0000830 33 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP C404 CAP,CERAMIC,CHIP ECCH0000113 18 pF,50V,J,NP0,TC,1005,R/TP LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 104 - Only for training and service purposes...
  • Page 106 100 nH,J ,1005 ,R/TP , L202 INDUCTOR,CHIP ELCH0005009 100 nH,J ,1005 ,R/TP , L204 INDUCTOR,CHIP ELCH0010302 100 nH,J ,1608 ,R/TP ,chip coil Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 105 - Only for training and service purposes...
  • Page 107 100 Kohm,1/16W ,J ,1005 ,R/TP R131 RES,CHIP,MAKER ERHZ0000406 100 Kohm,1/16W ,J ,1005 ,R/TP R132 RES,CHIP,MAKER ERHZ0000405 10 Kohm,1/16W ,J ,1005 ,R/TP LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 106 - Only for training and service purposes...
  • Page 108 ECZH0000826 27 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP R299 CAP,CHIP,MAKER ECZH0000826 27 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 107 - Only for training and service purposes...
  • Page 109 18 V, ,SMD , VA207 VARISTOR SEVY0003801 18 V, ,SMD , VA208 VARISTOR SEVY0003801 18 V, ,SMD , LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 108 - Only for training and service purposes...
  • Page 110 680 ohm,1/16W ,J ,1005 ,R/TP R229 RES,CHIP,MAKER ERHZ0000505 680 ohm,1/16W ,J ,1005 ,R/TP R230 RES,CHIP,MAKER ERHZ0000505 680 ohm,1/16W ,J ,1005 ,R/TP Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 109 - Only for training and service purposes...
  • Page 111 FR-4 ,0.8 mm,BUILD-UP 6 , ,; , , , , , , , , , U104 EUSY0250001 Leaded ,4 PIN,R/TP ,Hall IC LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 110 - Only for training and service purposes...

  • Page 112: Accessory

    100-240V ,5060 Hz,5.1 V,.7 A,NOM ,AC-DC ADAPTOR ,; SSAD00 ADAPTOR,AC-DC SSAD0024601 ,85Vac~264Vac ,5.1V +0.15V, -0.2V ,700mA ,5060 , ,WALL 2P ,I/O CONNECTOR , Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 111 - Only for training and service purposes...
  • Page 113 Note...
  • Page 114 Note...

This manual is also suitable for:

Kg370

Table of Contents