LG VX5400 Service Manual
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LG VX5400 Service Manual

Tri band, quad mode [pcs/gps/cellular/amps] cdma mobile phone
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CDMA Mobile Subscriber Unit
Internal Use Only
VX5400
SERVICE MANUAL
TRI BAND, QUAD MODE
[PCS/GPS/CELLULAR/AMPS]
CDMA MOBILE PHONE
Copyright@2007 LG Electronics. Inc. All right reserved.
LGE Internal Use Only
Only for training and serving purposes

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  • Page 1 CDMA Mobile Subscriber Unit Internal Use Only VX5400 SERVICE MANUAL TRI BAND, QUAD MODE [PCS/GPS/CELLULAR/AMPS] CDMA MOBILE PHONE Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and serving purposes...

  • Page 2: Table Of Contents

    2.1 Installing a Battery Pack .......................... 13 2.2 For Adapter Use............................13 2.3 For Mobile Mount............................. 13 CHAPTER 2. NAM INPUT METHOD …………………………………………………...15 LGE Internal Use Only Copyright@2007 LG Electronics. Inc. All right reserved. Only for training and serving purposes...
  • Page 3 4.1 Rx part Trouble ............................32 4.2 Tx part Trouble............................62 4.3 Logic part Trouble............................92 CHAPTER 5. Safety ……….…….…….……………………………………………..…...116 Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and serving purposes - 3 -...
  • Page 4 1. Assembly and Disassembly diagram ..................132 2. Block and Circuit diagram......................135 3. Part List ............................147 4. Component Layout........................160 5. BGA Pin Map..........................169 LGE Internal Use Only Copyright@2007 LG Electronics. Inc. All right reserved. Only for training and serving purposes...

  • Page 5: Chapter 1

    1.1.6 Frequency Stability 1) CDMA : ±0.5PPM 2) PCS : ±0.1PPM 3) AMPS : ±2.5PPM 1.1.7 Antenna : Intenna, 50 Ω Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and serving purposes - 5 -...

  • Page 6: Receive Specification

    2) PCS : -104 dBm (C/N 12dB or more) 3) GPS : -148.5 dBm (w/o SA), -152 dBm (w/SA) 4) AMPS : -116 dBm (12dB SINAD) LGE Internal Use Only Copyright@2007 LG Electronics. Inc. All right reserved. Only for training and serving purposes...
  • Page 7 Transmit Band : below –60dBm Receive Band : below –80dBm 1.2.15 AMPS Out of Band Conducted Spurious Emissions : Below -47dBm Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and serving purposes - 7 -...

  • Page 8: Transmit Specification

    1) CELLULAR : - 50dBm below 2) PCS: -50dBm below 1.3.6 AMPS Carrier ON/OFF Conditions “ ON” condition : within +3dB of specification output (in 2msec) LGE Internal Use Only Copyright@2007 LG Electronics. Inc. All right reserved. Only for training and serving purposes...
  • Page 9 : above 63+10log(Py) dB, where fo=carrier frequency, Py=mean output power in watts. 1.3.11 AMPS Harmonic and Conducted Spurious Emissions : above 43+10log(Py) dB Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and serving purposes...

  • Page 10: Ms (Mobile Station) Transmitter Frequency

    1050 1902.50 1863.75 1883.75 1075 1903.75 1865.00 1885.00 1100 1905.00 1866.25 1886.25 1125 1906.25 1867.50 1887.50 1150 1907.50 1868.75 1888.75 1175 1908.75 LGE Internal Use Only Copyright@2007 LG Electronics. Inc. All right reserved. -10- Only for training and serving purposes...

  • Page 11: Ms (Mobile Station) Receiver Frequency

    1943.75 1963.75 1075 1983.75 1945.00 1965.00 1100 1985.00 1946.25 1966.25 1125 1986.25 1947.50 1967.50 1150 1987.50 1948.75 1968.75 1175 1988.75 Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and serving purposes - 11 -...

  • Page 12: Ac Adapter : See Appendix

    - Center Freq. : 1575.42MHz 1.6 AC Adapter : See Appendix 1.7 Cigarret Lighter Adapter : See Appendix 1.8 Portable Hands-Free Kit : Not Supported LGE Internal Use Only Copyright@2007 LG Electronics. Inc. All right reserved. -12- Only for training and serving purposes...

  • Page 13: Installation

    Install the microphone either by clipping I onto the sunvisor (driver’s side) or by attaching it to door post (driver’s side), using a velcno adhesive tape (not included). Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and serving purposes...
  • Page 14 2.3.5.2 Antenna Cable Connection Connect the antenna coupler cable connector from the cradle to the external antenna connector. ( Antenna is not included.) LGE Internal Use Only Copyright@2007 LG Electronics. Inc. All right reserved. -14- Only for training and serving purposes...

  • Page 15: Chapter 2. Nam Input Method

    1. Press ‘1’ on keypad or ‘OK’ for entering Service Prg. 2. Check ESN, and Press “OK” button. (Read only) 3. Insert the NAM 1 PHONE NUMBER and press “OK” button. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and serving purposes...
  • Page 16 LGE Internal Use Only Copyright@2007 LG Electronics. Inc. All right reserved. -16- Only for training and serving purposes...
  • Page 17 6. Insert the NAM 1 NAME for ‘Edit’, and Press “OK” button. Edit SAVE 7. If you want to enter the more item, Press ‘More’ key. Otherwise Press ‘Exit’ Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and serving purposes - 17 -...
  • Page 18 And press “OK” button. 10. Insert the NAM 1 NMSID and Press “OK” button. 11. Insert the True IMSI MCC and Press “OK” button. LGE Internal Use Only Copyright@2007 LG Electronics. Inc. All right reserved. -18- Only for training and serving purposes...
  • Page 19 For NID Change, do the same way as SID change.) 15. Insert the NAM 1 CDMA Primary CH A, and press ‘OK’ button. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and serving purposes...
  • Page 20 If you want to change SID, Locate Black Mark in the SID with UP or Down button, and Press “OK” button, and Insert SID Number. For NID Change, do the same way as SID change.) LGE Internal Use Only Copyright@2007 LG Electronics. Inc. All right reserved. -20- Only for training and serving purposes...
  • Page 21 22. Use “UP” or “DOWN” key to select Yes or No and then Press “OK” button. 23. Insert the NAM 1 AMPS PHONE NUMBER and press “OK” button. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and serving purposes - 21 -...
  • Page 22 26. Use ‘UP’ or ‘DOWN’ key to select Yes or No and then press ‘OK’ button. 27. Insert the NAM 1 Access Overload Class, and Press “OK” button. LGE Internal Use Only Copyright@2007 LG Electronics. Inc. All right reserved. -22- Only for training and serving purposes...
  • Page 23 29. Check Phone Model, and Press “OK” button. 30. Insert Slot Cycle Index, and Press “OK” button. 31. Press “OK” and then the phone will restart. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and serving purposes...

  • Page 24: Chapter 3. Circuit Description

    After that, the RF signal is amplified by the Power Amp in order to have enough power for radiation. Finally, the RF signal is sent out to the cell site via the antenna after going through the Quintplexer. [Figure 1-1] Block Diagram Of VX5400 LGE Internal Use Only Copyright@2007 LG Electronics.
  • Page 25 LNA and mixer, attenuate receiver spurious response and suppress local oscillator energy. As a result frequency sensitivity and selectivity of mobile phone increase. The specification of VX5400 Quintplexer described below ; PCS band...
  • Page 26 The RFL6000 has cellular and PCS LNAs, respectively. The characteristics of Low Noise Amplifier (LNA) are low noise figure, high gain, high intercept point and high reverse isolation. The frequency selectivity characteristic of mobile phone is mostly determined by LNA. The specification of VX5400 LNAs are described below: Parameter Low gain...

  • Page 27: Description Of Transmit Part Circuit

    MMIC. The maximum power that can be inputted through the input terminal is +17dBm and conversion gain is about 28dB. RF transmit signals that have been amplified through Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...

  • Page 28: Description Of Frequency Synthesizer Circuit

    LCD part that displays the operation status onto the screen, and a receptacle that receives and sends out voice and data with external sources. LGE Internal Use Only Copyright@2007 LG Electronics. Inc. All right reserved. -28- Only for training and serving purposes...

  • Page 29: Circuit Description

    These signals are amplified at the audio amplifier and transmitted to the ear-piece. The signals from MSM6100 activate the ringer by using signals generated in the timer in MSM6100. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
  • Page 30 MCP contents 512 Mbits NAND flash memory and 256 Mbits SDRAM. In the Flash Memory part of MCP is programs used for terminal operation. The programs can be changed through down loading after the assembling LGE Internal Use Only Copyright@2007 LG Electronics. Inc. All right reserved. -30- Only for training and serving purposes...
  • Page 31 MSM6100. It is also supplied stable 2.85V_MSMP by regulator in U402 for fine view angle and LCD reflects to improve the display efficiency. 4 LEDs are used to display LCD backlight. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...

  • Page 32: Chapter 4. Trouble Shooting

    1. Check DC Power Supply circuit 4. Check RF Signal path 2. Check VCTCXO 5. Check Rx I/Q data Redownload S /W, Cal Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -32- Only for training and serving purposes...
  • Page 33 4.1.1.1 Checking DC Power supply circuit (PMIC) Test Point Test Point R520 R328 R516 R330 Circuit Diagram Circuit Diagram TP1 (PS_HOLD) TP2 (+2.9V_RX) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -33- Only for training and serving purposes...
  • Page 34 PMIC circuit is Ok. See next Page to Is it +2.9V_Rx OK? check control signal Pin 10. High? Replace PMIC Charging Board Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -34- Only for training and serving purposes...
  • Page 35 4.1.1.2 Checking VCTCXO circuit Test Point Test Point C124 C115 Circuit Diagram Circuit Diagram TP1 (VCC) TP2 (OUT) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -35- Only for training and serving purposes...
  • Page 36 Is it similar? to check control signal . Replace Main B /D Waveform Waveform 19.23MHz 2.739V Figure 4.1.1 (a) Figure 4.1.1 (b) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -36- Only for training and serving purposes...
  • Page 37 4.1.1.3 Checking Control signal Test Point Test Point SBST(24), SBCK(25), SBDT(26) RFR6000 U111 Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -37- Only for training and serving purposes...
  • Page 38 RF signal path . To Figure 4.1.1 (c), (d) Replace Main B /D Waveform Waveform SBDT SBST SBCK SBCK Figure 4.1.1 (c) Figure 4.1.1 (d) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -38- Only for training and serving purposes...
  • Page 39 Test Point L101 RFL6000 C101 Mobile Switch Quintplexer L104 RFR6000 PCS Tx Circuit Diagram Circuit Diagram DCN Tx PCS Rx DCN Rx Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -39- Only for training and serving purposes...
  • Page 40 To Figure 4.1.1 (f ). Is any signal detected at that point? RF signal path is OK. See next page to Rx I/Q data signal Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -40- Only for training and serving purposes...
  • Page 41 Waveform Waveform 4.1.1 (e) 4.1.1 (f) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -41- Only for training and serving purposes...
  • Page 42 4.1.1.5 Checking LNA Test Point Test Point L119 L109 RFL6000 U107 L112 R103 Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -42- Only for training and serving purposes...
  • Page 43 Pin 9 and 15 are High? To Figure 4.1.1 (c), (d) Replace U107 Check PMIC and MSMP LNA is O.K Check the Rx I/Q Signal Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -43- Only for training and serving purposes...
  • Page 44 4.1.1.6 Checking Rx I/Q data Test Point Test Point RFR6000 RFR6000 U111 U111 R124 R123 Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -44- Only for training and serving purposes...
  • Page 45 To Figure 4.1.1 (g), ( h) All DCN Rx check is completed . If the phone still do not work , change Main B /D . Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -45- Only for training and serving purposes...
  • Page 46 Waveform Waveform Graph 4.1.1(g) Graph 4.1.1(h) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -46- Only for training and serving purposes...
  • Page 47 1. Check DC Power Supply circuit 4. Check RF Signal path 2. Check VCTCXO 5. Check Rx I/Q data Redownload S/W, Cal Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -47- Only for training and serving purposes...
  • Page 48 4.1.2.1 Checking DC Power supply circuit (PMIC) Test Point Test Point R520 R328 R516 R330 Circuit Diagram Circuit Diagram TP1 (PS_HOLD) TP2 (+2.9V_RX) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -48- Only for training and serving purposes...
  • Page 49 PMIC circuit is Ok. See next Page to Is it +2.9V_Rx OK? check control signal Pin 10. High? Replace PMIC Charging Board Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -49- Only for training and serving purposes...
  • Page 50 4.1.2.2 Checking VCTCXO circuit Test Point Test Point C124 C115 Circuit Diagram Circuit Diagram TP1 (VCC) TP2 (OUT) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -50- Only for training and serving purposes...
  • Page 51 Is it similar? to check control signal . Replace Main B /D Waveform Waveform 19.23MHz 2.739V Figure 4.1.2 (a) Figure 4.1.2 (b) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -51- Only for training and serving purposes...
  • Page 52 4.1.2.3 Checking Control circuit Test Point Test Point SBST(24), SBCK(25), SBDT(26) RFR6000 U111 Circuit Diagram Circuit Diagram Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -52- Only for training and serving purposes...
  • Page 53 RF signal path . To Figure 4.1.2 (c), (d) Replace Main B /D Waveform Waveform SBDT SBST SBCK SBCK Figure 4.1.2 (c) Figure 4.1.2 (d) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -53- Only for training and serving purposes...
  • Page 54 Test Point L101 RFL6000 C101 Mobile Switch Quintplexer C106 L104 RFR6000 PCS Tx DCN Tx Circuit Diagram PCS Rx Circuit Diagram DCN Rx Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -54- Only for training and serving purposes...
  • Page 55 To Figure 4.1.2 (f ). Is any signal detected at that point? RF signal path is OK. See next page to Rx I/Q data signal Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -55- Only for training and serving purposes...
  • Page 56 Waveform Waveform 4.1.2 (e) 4.1.2 (f) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -56- Only for training and serving purposes...
  • Page 57 4.1.2.5 Checking LNA Test Point Test Point L115 RFL6000 L110 U107 L112 R103 Figure 4-6 Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -57- Only for training and serving purposes...
  • Page 58 Pin 9 and 15 are High? To Figure 4.1.2 (c), (d) Replace U107 Check PMIC and MSMP LNA is O.K Check the Rx I/Q Signal Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -58- Only for training and serving purposes...
  • Page 59 4.1.2.6 Checking Rx I/Q data Test Point Test Point RFR6000 RFR6000 U111 U111 R124 R123 Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -59- Only for training and serving purposes...
  • Page 60 To Figure 4.1. 2 (g), (H) All DCN Rx check is completed . If the phone still do not work , change Main B /D . Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -60- Only for training and serving purposes...
  • Page 61 Waveform Waveform Graph 4.1.2(g) Graph 4.1.2(h) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -61- Only for training and serving purposes...

  • Page 62: Tx Part Trouble

    1. Check DC Power Supply circuit 8. Check Quintplexer and Mobile Switch 2. Check VCTCXO 3. Check SBI Control Signal Redownload S/W, Cal Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -62- Only for training and serving purposes...
  • Page 63 4.2.1.1 Checking DC Power supply circuit (PMIC) Test Point Test Point R530 R541 R333 Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -63- Only for training and serving purposes...
  • Page 64 The Problem may be Lo gic part +2.6V_MSMP is OK? Refer to Logic troubleshoot DC Po wer supply Circuit is OK. See next Page to check VCTCXO circuit Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -64- Only for training and serving purposes...
  • Page 65 4.2.1.2 Checking VCTCXO circuit Test Point Test Point C124 C115 Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -65- Only for training and serving purposes...
  • Page 66 Is it similar? to check control signal . Replace Main B /D Waveform Waveform 19.23MHz 2.739V Figure 4.2.1 (a) Figure 4.2.1 (b) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -66- Only for training and serving purposes...
  • Page 67 4.2.1.3 Checking SBI Control Signal Test Point Test Point RFT_SBST, SBDT, SBCK Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -67- Only for training and serving purposes...
  • Page 68 With Fig. on Next page? Control Signal is O.K See next page Waveform Waveform SBDT SBST SBCK SBCK Figure 4.2.1 (c) Figure 4.2.1 (d) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -68- Only for training and serving purposes...
  • Page 69 4.2.1.4Checking RFT6100 circuit Test Point Test Point C171 TX_I_P, TX_I_M, TX_Q_P, TX_Q_M C154 Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -69- Only for training and serving purposes...
  • Page 70 Output signal level is show up? Replace U112 Refer to 4.2.1(f) for DCN 4.2.1(g) for Amps Control signal is O.K See next page Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -70- Only for training and serving purposes...
  • Page 71 Waveform Waveform Figure 4.2.1 (e) Figure 4.2.1 (f) Figure 4.2.1 (g) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -71- Only for training and serving purposes...
  • Page 72 Check pin1, 4 at F102. Referring to RF Tx SAW is OK Figure 4.2.1.(h) . Is it similar? Replace F 102 Figure 4.2.1(h) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -72- Only for training and serving purposes...
  • Page 73 4.2.1.6 Check DCN PAM circuit Test Point Test Point RF_OUT VBATT RF_IN PA_R1 Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -73- Only for training and serving purposes...
  • Page 74 3.4V. Check pin3 at U109(PA_R1 signal) Check PA_R1 line whether it is lower than 2.2V. Replace U109 Waveform Waveform Figure 4.2.1(i) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -74- Only for training and serving purposes...
  • Page 75 4.2.1.7 Check Quintplexer & Mobile Switch Test Point Test Point PCS Tx Circuit Diagram Circuit Diagram DCN Tx PCS Rx DCN Rx Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -75- Only for training and serving purposes...
  • Page 76 Signal is detected? Check pin 2 at U100 Replace U100 Signal is detected? Mobile S/W and Quintplexer is O.K Waveform Waveform Figure 4.2.1(j) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -76- Only for training and serving purposes...
  • Page 77 1. Check DC Power Supply circuit 8. Check Quintplexer and Mobile Switch 2. Check VCTCXO 3. Check SBI Control Signal Redownload S/W, Cal Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -77- Only for training and serving purposes...
  • Page 78 4.2.2.1 Checking DC Power supply circuit (PMIC) Test Point Test Point R530 R541 R333 Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -78- Only for training and serving purposes...
  • Page 79 +2.6V_MSMP2 is OK? Refer to Logic troubles hoot DC Po wer supply Circuit is OK. See next Page to c hec k VCTCXO circuit Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -79- Only for training and serving purposes...
  • Page 80 4.2.2.2 Checking VCTCXO circuit Test Point Test Point C124 C115 Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -80- Only for training and serving purposes...
  • Page 81 Is it similar? to check control signal . Replace Main B /D Waveform Waveform 19.23MHz 2.739V Figure 4.2.2 (a) Figure 4.2.2 (b) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -81- Only for training and serving purposes...
  • Page 82 4.2.2.3 Checking SBI Control Signal Test Point Test Point RFT_SBST, SBDT, SBCK Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -82- Only for training and serving purposes...
  • Page 83 With Fig. on Next page? Control Signal is O.K See next page Waveform Waveform SBDT SBST SBCK SBCK Figure 4.2.2 (c) Figure 4.2.2 (d) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -83- Only for training and serving purposes...
  • Page 84 4.2.2.4 Checking RFT6100 circuit Test Point Test Point C170 TX_I_P, TX_I_M, TX_Q_P, TX_Q_M C154 Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -84- Only for training and serving purposes...
  • Page 85 Almost 1volt level is show up? Check pin 23 at U112 Replace U112 Output signal level is show up? Control signal is O.K See next page Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -85- Only for training and serving purposes...
  • Page 86 Waveform Waveform Figure 4.2.1 (e) Figure 4.2.1 (f) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -86- Only for training and serving purposes...
  • Page 87 Start Check pin1, 4 at F103. Referring to RF Tx SAW is Figure 4.2.2.(g) Is it similar? Replace F 103 Figure 4.2.2(g) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -87- Only for training and serving purposes...
  • Page 88 4.2.2.6 Check PCS PAM circuit Test Point Test Point RF_OUT VBATT RF_IN PA_R1 Circuit Diagram Circuit Diagram Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -88- Only for training and serving purposes...
  • Page 89 3.4V. Check pin3 at U108(PA_R1 signal) Check PA_R1 line whether it is lower than 2.2V. Replace U108 Waveform Waveform Figure 4.2.2(h) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -89- Only for training and serving purposes...
  • Page 90 4.2.2.7 Check Quintplexer & Mobile Switch Test Point Test Point PCS Tx Circuit Diagram Circuit Diagram DCN Tx PCS Rx DCN Rx Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -90- Only for training and serving purposes...
  • Page 91 Replace U101 Signal is detected? Check pin 2 at U100 Replace U100 Signal is detected? Mobile S/W and Quintplexer is O.K Waveform Waveform Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -91- Only for training and serving purposes...

  • Page 92: Logic Part Trouble

    R518 +2.8V_TCXO +2.6V_MSMA +2.9V_RX R538 R520 R529 +2.6V_MSMP Figure 4- Power circuit diagram +2.8V_TCXO Test point Test point +2.9V_RX +1.86V_MSMC +2.6V_MSMP +2.6V_MSMA Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -92- Only for training and serving purposes...
  • Page 93 Does it work properly ? Does it work properly ? Re-download software and try again Re-download software and try again The Phone will power on Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -93- Only for training and serving purposes...
  • Page 94 4.3.2 CHARGING TROUBLE Circuit Diagram Circuit Diagram Battery Vcc D602 U603 CON601 Test point Test point Pin4 CON 601 U603 D602 Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -94- Only for training and serving purposes...
  • Page 95 Re-solder U603 The battery may have the problem. Is the battery charged? Change the battery and try again. Charging will operate properly Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -95- Only for training and serving purposes...
  • Page 96 4.3.3 AUDIO - Receiver Trouble Circuit Diagram Circuit Diagram CON700 RCV+ RCV- U402 C427 Test point Test point C427 C708 C707 CON700 U402 Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -96- Only for training and serving purposes...
  • Page 97 The receiver pad RCV+/RCV- Check the soldering of receiver Replace Receiver Check the signal at RCV+/RCV_ Resolder receiver Receiver will work properly Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -97- Only for training and serving purposes...
  • Page 98 4.3.4 AUDIO - Speaker Trouble Circuit Diagram Circuit Diagram C423 C424 R438 Test point Test point C423 U403 R438 C424 SPK - SPK + Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -98- Only for training and serving purposes...
  • Page 99 PIN Vout 1,2 of U403 Resoldering contact of Check the state of contact speaker pad on LCD module Of speaker Speaker will work properly Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -99- Only for training and serving purposes...
  • Page 100 Circuit Diagram Circuit Diagram MIC PAD+ MIC PAD- R415 R416 R418 MIC Bias Test point Test point M400 R418 R416 MIC FILTER NETWORK Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -100- Only for training and serving purposes...
  • Page 101 Check the soldering of Resolder C415,C416 C415,C416 Check the soldering of Resolder MIC filter part MIC filter part MIC will work properly Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -101- Only for training and serving purposes...
  • Page 102 4.3.6 AUDIO - Earphone Trouble Circuit Diagram Circuit Diagram R628 R627 C607 EAR_L Q600 Test point Test point C603 CON600 Q600 R627 R628 Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -102- Only for training and serving purposes...
  • Page 103 Level of C603 Download is about 1.2V Re-soldering of Check soldering of Pin 3 of CON600 Pin 3 of CON600 Change main board Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -103- Only for training and serving purposes...
  • Page 104 R627, R628 Change main Does it work well? board Level of C313 is Re-solder About a few tens C313 or hundreds VAC? Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -104- Only for training and serving purposes...
  • Page 105 4.3.7 VIBRATOR TROUBLE Circuit Diagram Circuit Diagram R601 R603 Q602 Q601 Test point Test point R601 Q602 R603 Q601 R602 Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -105- Only for training and serving purposes...
  • Page 106 Re-contact vibrator Is the voltage of LCD’s vibrator contact point about 3.5V Rplace the FPCB Rplace the vibrator The vibrator will work properly Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -106- Only for training and serving purposes...
  • Page 107 Test point LED412 LED417 LED412 LED411 LED409 LED4115 LED418 LED419 LED414 LED410 LED408 LED413 LED405 LED406 LED400 LED407 LED404 LED401 LED402 LED403 Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -107- Only for training and serving purposes...
  • Page 108 Check the soldering of each R or replace LEDs not working working? Q400, R424 is working? Check the condition of Q400, R424. If problem, Change Q400, R424. BACKLIGHT WILL WORK PROPERLY Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -108- Only for training and serving purposes...
  • Page 109 - The assembly status of the LCD Module - The Soldering of connector - The Soldering of EMI Filters - FPCB F704 F705 F700 F701 Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -109- Only for training and serving purposes...
  • Page 110 F700,F701,F704,F705 F700,F701,F704,F705 D[0:7], LCD_RESET/, R700,R701,R702,R703,R704 R700,R701,R702,R703 LCD_RS/,M LCD_CS/, Is good? ,R704 SLCD_CS/,OE2/,WE2/ Check CON700 soldering Re-soldering CON700 LCD display will work properly Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -110- Only for training and serving purposes...
  • Page 111 4.3.10 CAMEARA TROUBLE Circuit Diagram Circuit Diagram F703 F706 F702 Test point Test point X100 F706 C539 F703 F702 C538 Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -111- Only for training and serving purposes...
  • Page 112 Check the connecting status of Camera Module and FPCB and FPCB Change the Camera Camera work good? module Camera display will work properly Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -112- Only for training and serving purposes...
  • Page 113 4.3.11 USB TROUBLE Circuit Diagram Circuit Diagram USB_SUSPEND C523 Q500 USB_OE/ R534 R535 USB_D- C532 USBD+ +5V_USB +2.6V_MSMA USB_DATA C525 C528 R300 X200 Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -113- Only for training and serving purposes...
  • Page 114 Test point Test point Q500 C528 C525 C532 C523 R534 R535 USB wave form USB wave form Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -114- Only for training and serving purposes...
  • Page 115 Check the soldering U500 U500 USB_SUSPEND = Low? Replace U500 The USB interface will work properly The USB interface will work properly Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -115- Only for training and serving purposes...
  • Page 116 If so, use only a manufacture approves antenna. Otherwise, take your phone to a qualifies service center for repair. Use only the supplied or approved antenna. Non-approved antennas, modifications, or attachments, could impair call quality, damage the phone, and violate FCC regulations. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -116-...
  • Page 117 Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -117-...
  • Page 118 Rule of Thumb: Using common sense at all times when handling, installing or using the phone. Any questions should be directed to you nearest Service Center or authorized service technician or electrician. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
  • Page 119 A-key. A secret, 64-bit pattern stored in the mobile station. It is used to generate update the mobile station’s Shared Secret Data. The A-key is used in the mobile station authentication process. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
  • Page 120 . See Code Division Multiple Access CDMA Channel. The set of channels transmitted between the base station within a given CDMA frequency assignment. See also Forward CDMA Channel and Reverse CDMA Channel. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -120-...
  • Page 121 Dim-and-Burst. A frame in which primary traffic is multiplexed with either secondary traffic or signaling traffic. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
  • Page 122 Channels. The Forward CDMA Channel always carries a Pilot Channel and may carry up to one Sync Channel, up to seven Paging Channels, and up to 63 Traffic Channels, as long as the total number of channels, including the Pilot Channel, is no greater than 64. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -122-...
  • Page 123 See also Layering and Layer 3. Layer 3. Layer 3 provides the control of the Cellular telephone systems. Signaling messages originate and terminate at layer 3. See also Layering and Layer 2. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -123-...
  • Page 124 Mobile Switching Center (MSC). A configuration of equipment that provides Cellular radiotelephone service. Also called the Mobile Telephone Switching Office (MTSO) Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -124- Only for training and serving purposes...
  • Page 125 Optional Field. A field defined within a message structure that is optionally to the message recipient. Order. A type of message that contains control codes for either the mobile station or the base station. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
  • Page 126 Pilot PN Sequence Offset Index. The PN offset in units of 64 PN chips of a pilot, relative to the zero offset pilot PN sequence. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -126- Only for training and serving purposes...
  • Page 127 Active Set, Candidate Set, and Neighbor Set. See also Active Set, Candidate Set, and Neighbor Set. Request. A layer 3 message generated by either the mobile station or the base station to retrieve information, ask for service, or command an action. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -127-...
  • Page 128 Slotted Mode. An operation mode of the mobile station in which the mobile station monitors only selected slots on the Paging Channel when in the Mobile Station Idle State. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only...
  • Page 129 The counter is incremented an average of once per 80 ms period. Time Reference. A reference established by the mobile station that is synchronous with the earliest arriving multipath component used for demodulation. Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -129-...
  • Page 130 Zone-Based Registration. An autonomous registration method in which the mobile station registers whenever it enters a zone that is not in the mobile station’s zone list. ㎲. Microsecond Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -130-...
  • Page 131 Appendix Appendix Assembly and Disassembly diagram Block and Circuit diagram Part List Component Layout BGA Pin Map Copyright@2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only -131- Only for training and serving purposes...
  • Page 132 Internal Use Only 1. Assembly and Disassembly Diagram -132-...
  • Page 133 Internal Use Only...
  • Page 134 Internal Use Only...
  • Page 135 Internal Use Only 2. Block and Circuit Diagram -135-...
  • Page 136 Internal Use Only -136-...
  • Page 137 Internal Use Only VX5400 Circuit Diagram 1. VX5400 Main PCB (Rev.1.0) 2. VX5400 sub_fpcb (Rev.1.0) 3. VX5400 mod_fpcb (Rev.1.0) 4. VX5400 cam_key (Rev.1.0) 5. VX5400 vol_key (Rev.1.0) -137-...
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  • Page 145 -145-...
  • Page 146 -146-...
  • Page 147 Internal Use Only 3. Part List -147-...
  • Page 148 Main PCB Component List Internal Use Only Ref No Part Name Part Number Spec Maker P/N MLAZ00 LABEL MLAZ0038301 PID Label 4 Array LG-VX6000 PCB ASSY,MAIN, SAFC00 SMT BOTTOM SAFC0089001 ANT100 CONTACT,ANTENNA MCIA0018901 PRESS, BeCu, 0.15, , , , MCIA0018901 ANT102 CONTACT,ANTENNA MCIA0018901 PRESS, BeCu, 0.15, , , ,...
  • Page 149 Internal Use Only Ref No Part Name Part Number Spec Maker P/N C154 CAP,CHIP,MAKER ECZH0003124 68 nF,16V ,K ,X7R ,HD ,1005 ,R/TP GRM36X7R683K16PT C155 CAP,CERAMIC,CHIP ECCH0000104 3 pF,50V,C,NP0,TC,1005,R/TP MCH155A030C C156 CAP,CERAMIC,CHIP ECCH0000104 3 pF,50V,C,NP0,TC,1005,R/TP MCH155A030C C157 CAP,CERAMIC,CHIP ECCH0000107 6 pF,50V,D,NP0,TC,1005,R/TP MCH155A060DK C158 CAP,CERAMIC,CHIP...
  • Page 150 Internal Use Only Ref No Part Name Part Number Spec Maker P/N C308 CAP,CERAMIC,CHIP ECCH0000155 10 nF,16V,K,X7R,HD,1005,R/TP MCH153CN103KK C309 CAP,CERAMIC,CHIP ECCH0000155 10 nF,16V,K,X7R,HD,1005,R/TP MCH153CN103KK C310 CAP,CERAMIC,CHIP ECCH0000155 10 nF,16V,K,X7R,HD,1005,R/TP MCH153CN103KK C311 CAP,CERAMIC,CHIP ECCH0000155 10 nF,16V,K,X7R,HD,1005,R/TP MCH153CN103KK C312 CAP,CERAMIC,CHIP ECCH0000155 10 nF,16V,K,X7R,HD,1005,R/TP MCH153CN103KK C313 CAP,CHIP,MAKER...
  • Page 151 Internal Use Only Ref No Part Name Part Number Spec Maker P/N C518 CAP,CERAMIC,CHIP ECCH0000155 10 nF,16V,K,X7R,HD,1005,R/TP MCH153CN103KK C519 CAP,CERAMIC,CHIP ECCH0005603 2.2 uF,10V ,K ,X5R ,TC ,1608 ,R/TP GRM39X5R225K10 C520 CAP,CERAMIC,CHIP ECCH0007802 4.7 uF,10V ,M ,X5R ,TC ,1608 ,R/TP CV105X5R475M10AT C521 CAP,CHIP,MAKER ECZH0001215...
  • Page 152 Internal Use Only Ref No Part Name Part Number Spec Maker P/N 881.5 MHz,25 MHz,2.5 dB,35 dB,1960 MHz,60 MHz,3.5 dB,13 dB,2.0*1.6*0.5 ,SMD 869M~894M,1930M~1990M,10p,B,100,100_1 2,DCN+USPCS Rx ,; ,881.5,1960 F100 FILTER,SAW,DUAL SFSB0001201 ,2.0*1.6*0.5 ,SMD ,R/TP FAR-G6KE-1G9600-Y4LY 1575.42 MHz,2.0*1.4*0.78 ,SMD ,1574.42M~1576.42M, IL 0.9, 5pin, U-U, 50-50, GPS BPF , ,1575.42 F101 FILTER,SAW SFSY0016801...
  • Page 153 Internal Use Only Ref No Part Name Part Number Spec Maker P/N Q602 TR,BJT,PNP EQBP0004102 USM ,100 mW,R/TP , KTN2907AU Q603 TR,BJT,NPN EQBN0007601 SOT-23 ,0.15 W,R/TP ,EMT3 KTC4075E Q604 TR,BJT,NPN EQBN0012401 ESM ,100 mW,R/TP ,NPN TRANSISTOR KRC402E Q605 TR,BJT,ARRAY EQBA0000601 UMT5 ,.2 W,R/TP , KRX102U R100...
  • Page 154 Internal Use Only Ref No Part Name Part Number Spec Maker P/N R415 RES,CHIP,MAKER ERHZ0000243 2200 ohm,1/16W ,F ,1005 ,R/TP MCR01MZSF2201 R417 RES,CHIP,MAKER ERHZ0000243 2200 ohm,1/16W ,F ,1005 ,R/TP MCR01MZSF2201 R419 RES,CHIP,MAKER ERHZ0000490 51 ohm,1/16W ,J ,1005 ,R/TP MCR01MZSJ510 R424 RES,CHIP,MAKER ERHZ0000405 10 Kohm,1/16W ,J ,1005 ,R/TP...
  • Page 155 Internal Use Only Ref No Part Name Part Number Spec Maker P/N 2.0*2.0*1.1 ,6 PIN,R/TP , U103 EUSY0265501 LNA with Shutdown function ALM-1106-TR1 SC70JW-8 ,714 mW,6 V,2.3 A,R/TP , U104 TR,FET,P-CHANNEL EQFP0003501 Slew Rate Controlled Load Switch AAT4280IJS-3-TI -24.2 dB,-0.2 dB,-34.2 dB,1.0*0.58*0.35 ,SMD , COUPLER, Pb-free_Coupler_USPCS Tx ,;...
  • Page 156 Internal Use Only Ref No Part Name Part Number Spec Maker P/N C506 CAP,CHIP,MAKER ECZH0000813 100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP C1005C0G1H101JT C542 CAP,CHIP,MAKER ECZH0000813 100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP C1005C0G1H101JT C543 CAP,CHIP,MAKER ECZH0000813 100 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP C1005C0G1H101JT C544 CAP,CHIP,MAKER...
  • Page 157 Internal Use Only Ref No Part Name Part Number Spec Maker P/N LED409 DIODE,LED,CHIP EDLH0004501 BLUE ,1608 ,R/TP , LEBB-S14E LED410 DIODE,LED,CHIP EDLH0004501 BLUE ,1608 ,R/TP , LEBB-S14E LED411 DIODE,LED,CHIP EDLH0004501 BLUE ,1608 ,R/TP , LEBB-S14E LED412 DIODE,LED,CHIP EDLH0004501 BLUE ,1608 ,R/TP , LEBB-S14E LED413 DIODE,LED,CHIP EDLH0004501...
  • Page 158 Internal Use Only Ref No Part Name Part Number Spec Maker P/N R547 VARISTOR SEVY0003601 5.6 V, ,SMD ,100pF, 1005 ICVL0505101V150FR R701 RES,CHIP,MAKER ERHZ0000411 120 ohm,1/16W ,J ,1005 ,R/TP MCR01MZSJ121 R702 RES,CHIP,MAKER ERHZ0000411 120 ohm,1/16W ,J ,1005 ,R/TP MCR01MZSJ121 R703 RES,CHIP,MAKER ERHZ0000411 120 ohm,1/16W ,J ,1005 ,R/TP...
  • Page 159 Internal Use Only FPCB Component List Ref No Part Name Part Number Spec Maker P/N PCB ASSY,FLEXIBLE, SACE00 SACE0052501 PCB ASSY,FLEXIBLE, SACC00 SMT BOTTOM SACC0031901 C100 CAP,CERAMIC,CHIP ECCH0000155 10 nF,16V,K,X7R,HD,1005,R/TP MCH153CN103KK 33 pF,50V ,J ,NP0 ,TC , C101 CAP,CHIP,MAKER ECZH0000830 1005 ,R/TP C1005C0G1H330JT 33 pF,50V ,J ,NP0 ,TC ,...
  • Page 160 4. Components Layout -160-...
  • Page 161 U403 AUDIO AMP Q100 INVERTER U112 U108 PCS PAM U109 DCN PAM TS499OIST TC7SH04FU RFT 6100 AWT6308R AWT6307R No Tx Power No sound Low Tx Power Can’t make a call Can’t make a call U501 LCD B/L CP U100 MOBILE S/W U104 RN5T662 RF 600...
  • Page 162 CON700 U600 64PIN B’ TO B HALL IC CONNECTOR TK60015CS8 Can’t display LCD Cant’ detect Folder open M400 Can’t operate Camera MICROPHONE No voice sound -162-...
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  • Page 169 5. BGA Pin MAP -169-...
  • Page 170 1. U300 MSM6100-90NM(EUSY0152202) USED NOT USED -170-...
  • Page 171 2. U300 HYC0SEE0MF1P-6SH0E (EUSY0322101) USED NOT USED -171-...

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