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Features of Mobile Subscriber Radio Handset (LG-ID3100 Type) 1. Wave Type • G7W 2. Frequency Scope • Transmit Frequency : 824.820 ~ 848.190MHz • Receive Frequency : 869.820 ~ 893.190MHz 3. Rated Output Power • 0.282W(24.5dBm) 4. Output Conversion Method : This is possible by correcting the key board channel.
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CDMA MOBILE SUBSCRIBER UNIT LG-ID3100 SERVICE MANUAL SINGLE BAND CDMA MOBILE PHONE...
2. Digital/Voice Processing Part ....................17 CHAPTER 3. Trouble Shoot 3.1. RX part Trouble ........................21 3.2. TX part Trouble ........................24 3.3. Logic part Trouble ........................ 28 Appendix Block Diagram Circuit Diagram Component Layout Total Assy LG Electronics Inc.
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LG-ID3100 General Introduction The LG-ID3100 cellular phone functions as digital cellular phone worked in CDMA (Code Division Multiple Access) mode. CDMA mode applies the DSSS (Direct Sequence Spread Spectrum) technique that has been used in military. This technique enables to share one frequency channel with many users in the same specific area.
Another method available is to make two persons to sing in different languages at the same time, space, and frequency when wishing to let the audience hear the singing without being confused. This is the characteristics of CDMA. 3/57 LGE Internal Use Only LG Electronics Inc.
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At this time, the spectrums of other signals that have different codes are not recovered into its original state and instead, processed as noise and appears as the self-interference of the system. 4/57 LGE Internal Use Only LG Electronics Inc.
The backward open loop power control is carried out in a corresponding mobile station; the mobile station measures power received from the cell site and then, reversely increases/decreases transmit power in order to compensate channel changes caused by the forward link path loss and terrain 5/57 LGE Internal Use Only LG Electronics Inc.
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During the soft hand, the cell site already in the busy state and the cell site to be engaged in the call later participate in the call conversion. The call conversion is carried out through the original call 6/57 LGE Internal Use Only LG Electronics Inc.
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(AGC Amp). Then, they are converted into RF band by the frequency synthesizer synchronizing these signals to proper output frequencies. Transmit signals obtained pass through the duplexer filter and then, are sent out to the cell site via the antenna. 8/57 LGE Internal Use Only LG Electronics Inc.
Stand-By Time 140 Hrs (SCI=2) Talk Time 145 Min (Cell power -92dBm) 4.2 Receive Specification 4.2.1 Frequency Range : 869.820 MHz ~ 893.190 MHz 4.2.2 Local Oscillating Frequency Range : 1738.08MHz ~ 1787.94MHz 9/57 LGE Internal Use Only LG Electronics Inc.
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±300Hz or less 4.3.6 CDMA TX Conducted Spurious Emissions • 900kHz : - 42 dBc/30kHz below • 1.98MHz : - 54 dBc/30kHz below 4.3.7 CDMA Minimum TX Power Control : - 50dBm below 10/57 LGE Internal Use Only LG Electronics Inc.
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887.04 MHz 874.560 MHz 875.790 MHz 888.270 MHz 877.020 MHz 889.500 MHz 878.250 MHz 890.910 MHz 892.140 MHz 879.480 MHz 880.890 MHz 893.370 MHz 4.6 Charge time 4.6.1 Standard Battery : 200 Min. 11/57 LGE Internal Use Only LG Electronics Inc.
Connect the kit’s power cable connector to the interface box power receptacle. 5.3.2.2 Antenna Cable Connection Connect the antenna coupler cable connector from the cradle to the external antenna connector. ( Antenna is not included.) 12/57 LGE Internal Use Only LG Electronics Inc.
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 duplexer 13/57 LGE Internal Use Only LG Electronics Inc.
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Insertion loss (IL) in the transmit band is 2.8dB (Max), whereas IL in the receive band is 3.5dB (Max). The receive band attenuation amount of transmit filter is 45dB (Min) and the transmit band attenuation amount of receive filter is 57dB or more (Min). 14/57 LGE Internal Use Only LG Electronics Inc.
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I and I/ are 180 deg. The mixer in QSC6010 converts baseband signals into RF signals. After passing through the upconverters, RF signal is inputted into the Power Amplifier Module. The QSC6010 Cellular CDMA RF specifications are described below: 15/57 LGE Internal Use Only LG Electronics Inc.
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1.4.1 Crystal Oscillator (X202) Crystal Unit generates the refrence frequency of 19.2MHz. Tolerance at 25 ° C is ±12x10 Max. at -30 to 85 ° C Max.Tolerance over the tmperature range is ±12x10 16/57 LGE Internal Use Only LG Electronics Inc.
QSC6010 is the core elements of a CDMA mobile station and carries out the functions of CPU, encoder, interleaver, deinterleaver, Viterbi decoder, Mod/Demod, codec, and vocoder.with RF, and PA module 2.2.4 Memory Part The memory part is made up of a flash memory, SRAM for storing data. 17/57 LGE Internal Use Only LG Electronics Inc.
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57 GPIOs. Many of the AMSS-configurable GPIOs are available for alternate uses as desired by the wireless product designers. Support circuitry and baseband internal functions include security, clock generation and distribution, JTAG/ETM test interfaces, mode and reset controls, and the Q-fuse. 18/57 LGE Internal Use Only LG Electronics Inc.
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When the battery voltage (+4.2V) is fed and the PWR key of keypad is pressed, the power-up circuitry in QSC6010(U201) is activated by the PWR_ON_SW/ signal, and then the LDO regulators embedded in QSC6010 are operated and +2.80V_MSMC, +2.85V_MSMP and +2.6V_MSMA are generated. 19/57 LGE Internal Use Only LG Electronics Inc.
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LCD module contains a controller which will display the information onto the LCD by 16-bit data from the QSC6010. It is also supplied stable 1.8V_MSM_E1 by inner regulator in U201 for fine view angle and and LCD reflects to improve the display efficiency. 20/57 LGE Internal Use Only LG Electronics Inc.
LG-ID3100 CHAPTER 3. Trouble Shooting CHAPTER 3. Trouble Shooting 3.1 Rx Part Trouble When Rx Sensitivity isn’t good enough Test Point LG Electronics Inc. 21/57 LGE Internal Use Only...
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LG-ID3100 Circuit Diagram LG Electronics Inc. 22/57 LGE Internal Use Only...
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Change RF cable or re-set loss RF cable & Loss 2. Check RF path Re-work or replace them Circuit connection 3. Check TP1(U101), TP2(DP101), Replace them TP3(F101) Download S/W & Calibrate Replace QSC6010 or main board LG Electronics Inc. 23/57 LGE Internal Use Only...
Circuit Diagram Figure 3.3.1 QSC6010 circuit diagram Test Points TP1(R404) : PWR_ON_SW U201 QSC6010 TP3(R217) : +2.6V_MSMP TP7(C225) : +2.6V_TX TP6(C255) : +2.6V_RX TP2(R224) : +1.2V_MSMC TP5(R236) : +2.85V_TCXO TP4(R244) : +2.65V_MSMA LG Electronics Inc. 28/57 LGE Internal Use Only...
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Check the contact of power-key the level change of or dome switch TP1(R404) Check the voltage of the following port at U201 TP2(+1.2V_MSMC) TP3(+2.6V_MSMP) Replace U201 TP4(+2.65V_MSMA) TP6(+2.85V_TCXO) TP6(+2.6V_RX) TP7(+2.6V_TX) Re-download Software LG Electronics Inc. 29/57 LGE Internal Use Only...
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LG-ID3100 3.3.2 Charging Trouble Test Points TP2(U201) : QSC6010 TP1(CON404) Figure 3.3.2 Charging PART Circuit Diagram TP1(CON404) TP2(U201) LG Electronics Inc. 30/57 LGE Internal Use Only...
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Change the charging adaptor. of TP1(CON404) =5V ? Replace TP2(U201) or Check TP2(U201) circuit mainboard Is the battery The battery may have the problem charged Change the battery and try again. Charging will operate properly LG Electronics Inc. 31/57 LGE Internal Use Only...
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LG-ID3100 3.3.3 Audio AMP Trouble Test Points U309 QSC_AMP_OUT- COM_SPK- U308 QSC_AMP_OUT+ COM_SPK+ Figure 3.3.3 RECEIVER PART Circuit Diagram LG Electronics Inc. 32/57 LGE Internal Use Only...
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Check the signal Replace U201(QSC6010) or board TP1, TP2 of U308, U309 Check the signal Re-soldering or level at TP3, TP4 Replace the U308, U309 of U308, U309 Speaker will work properly LG Electronics Inc. 33/57 LGE Internal Use Only...
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LG-ID3100 3.3.6 MIC Trouble Test points R326 U302(MIC) (C321) U201 (QSC6010) TP2(MIC +) Circuit Diagram TP2(MIC +) LG Electronics Inc. 34/57 LGE Internal Use Only...
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Check the signal level Replace the U302(MIC) at TP2 of U302(MIC) Is It a few tens mV(AC)? Check the soldering of Re-solder TP3(C321) TP3(C321) Does MIC work Properly? Replace U201(QSC6010) MIC will work properly LG Electronics Inc. 35/57 LGE Internal Use Only...
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SETTING : “Vibrator on” at Sounds of test menu START Check the state of Re-contact vibrator Contact of Vibrator Replace Vibrator Does Vibrator work Properly? Check the solder of Re-solder or replace them TP1,TP2 Replace U201(QSC6010) or board LG Electronics Inc. 36/57 LGE Internal Use Only...
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LG-ID3100 3.3.8 Key Backlight LED Trouble Test Points Figure 3.3.8 KEYPAD BACK LIGHT PART Circuit Diagram Figure 3.3.8 KEYPAD Back Light Circuit LG Electronics Inc. 37/57 LGE Internal Use Only...
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Is the voltage level of Check the soldering of each Resister or (TP1~TP8) Replace them. 3.2-4.2V? Check LEDs’ directions Re-solder or replace LEDs Check the signal level at Replace U201(QSC6010) TP9(KYPD_EN)=high? BACKLIGHT WILL WORK PROPERLY LG Electronics Inc. 38/57 LGE Internal Use Only...
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LG-ID3100 3.3.9 Earphone Trouble Test Points TP13 TP12 (R392) TP11 U311 TP10 CON301 (R393) Circuit Diagram TP10 TP11 TP12 TP13 LG Electronics Inc. 39/57 LGE Internal Use Only...
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Path problem try again. from the earphone? Can you hear the sound from the earphone? Can you hear your voice from the earphone? Earphone sending path problem Change Earphone. Earphone will work properly LG Electronics Inc. 40/57 LGE Internal Use Only...
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Profile of the phone change to is less than 1.4V? the earphone mode? Re-download software Does it work well? Replace QSC6010 Check soldering Re-solder or replace CON301 the CON301 Change the main board or QSC6010 LG Electronics Inc. 41/57 LGE Internal Use Only...
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U311 is Low? at TP8 and TP9? If problem, replace the U311 (High: FM Mode) Re-download S/W Signwave appear at Check the receiving path from U311 to CON301 TP12 and 13 of CON301? LG Electronics Inc. 42/57 LGE Internal Use Only...
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LG-ID3100 3.3.10 LCD Trouble Test Points Pin2 CON406 U303 Pin1 Pin35 Pin1 Circuit Diagram LG Electronics Inc. 43/57 LGE Internal Use Only...
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Check the Re-Soldering CON406 CON406 Soldering Check the Control signal Does R405~R476 Re-soldering or Replace D[0:15], LCD_RESET/, (LCD connection) R405~R476 LCD_ID, LCD_CS/ Work Properly? ,LCD_LIGHT Change the Main Board Change the LCD Module LG Electronics Inc. 44/57 LGE Internal Use Only...
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START Check the TP2 of U303, Check & replace QSC +VPWR Re-Soldering or Does U303 work Properly? Replace U303 Check the signal level at Replace QSC TP3(LCD_BACK_EN)=high? LCD backlight will work properly LG Electronics Inc. 45/57 LGE Internal Use Only...
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LG-ID3100 3.3.11 UIM Trouble Test Points U201 TP1(CON302) (QSC6010) Circuit Diagram LG Electronics Inc. 46/57 LGE Internal Use Only...
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LG-ID3100 Checking Flow TP2, TP3, TP4, TP5 LG Electronics Inc. 47/57 LGE Internal Use Only...
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LG-ID3100 3.3.12 FM Radio Trouble Test Points Pin1 X101 U104 (R138) Q102 (R139) Circuit Diagram Frequency Generator Circuit FM Receiver Circuit FM AMP Circuit LG Electronics Inc. 48/57 LGE Internal Use Only...
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TP3,TP4? component. Audio signal Check the FM AMP circuit. appear at TP5 If problem, replace the defected and TP6 of component. U104? Refer to Earphone Trouble part. Graph 1. FM Radio Clock LG Electronics Inc. 49/57 LGE Internal Use Only...
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ID3100 Block Diagram RF500(U101) Mobile S/W IL : 0.4~0.5dB B9426(F110) IL=1.5~2.3 dB Quadrature Upconverter V ref=2.85V SKY77162(U102) RF Block Quadrature EFSD836MF1S2(DP101) Downconverter TX IL 1.5 ~ 2.3 dB EFCH881MTCA7(F103) RX IL 2.3 ~ 3.5 dB IL = 1.5~2.0 dB QSC6010 ANT(Headset) Output Memory...
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LG-RD3000/RD3100 MAIN Doc. Name Doc. Number SHEET : 1 OF 4 ID3100 1/4 DRAW : T.H.KIM DATE 2007.04.10 CHKD H.T.KIM APRD <RF Tx PATH> Q101 KRX102U +VPWR +2.85V_TCXO <ANT> C124 ISSUE : C101 C121 PA_ON 1608 ANT101 10u-10V ANT-RD2330 2.2u...
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LG-RD3000/RD3100 MAIN Doc. Name Doc. Number SHEET : 3 OF 4 ID3100 3/4 DRAW : +VPWR T.H.KIM < AUDIO PART > U306 <MEMORY> COM_SPK+ EMS1810TPB1P DATE 2007.04.10 U308 NLAS4157DFT2G CHKD H.T.KIM R395 0 +1.8V_MSM_E1 QSC_AMP_OUT+ RCV/SPK_MODE APRD +2.9V_MSM_E2 R309 100n...
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LG-RD3000/RD3100 MAIN Doc. Name Doc. Number SHEET : 4 OF 4 ID3100 4/4 DRAW : <RECEPTACLE with DC JACK> T.H.KIM DATE 2006.04.10 R413 <MAIN KEY> CHKD +2.6V_MSMP H.T.KIM CON402 1005 HSBC-2P-65 SW419 APRD SW417 SW412 SW405 HFSO/ +VPWR R473 220k R450 +2.6V_MSMP...
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U303 MIC doesn't work U103, X101 FM Radio part L304 FM Radio doesn't work C161 C160 R326 C317 R305 LED312 LED313 SW407 LED302 LED306 LED306 LED308 U302 U302 U306 Speaker connector No audio sound R331 LED303 LED305 LED305 LED309 SW422 LED311 LED314 U492...
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CON301, U311 CON404 CON406 F110 Earphone CON303 U201 Receptacle with DC Jack DCN TX SAW Filter CON302 LCD Connector doesn't work Motor Connector QSC6010 No DM connection UIM Socket No LCD Display Can't make a call Vibrator doesn't Can't power on Hands-Free kit doesn't work Low TX power UIM doesn't work...