Service Manual
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... abbreviations apply: APC Automatic Power Control BB BER CC-CV DAC DCS Baseband Bit Error Ratio Constant Current - Only for Mobile Communications International Portable User Identity Intermediate Frequency LCD LDO LED OPLL Liquid Crystal Display Low Drop Output Light Emitting Diode Offset Phase... Locked Loop Copyright © 2007 LG Electronics. Constant Voltage Digital to Analog Converter Digital Communication System dBm DSP EEPROM ESD FPCB dB relative to 1 milli watt Digital...
... abbreviations apply: APC Automatic Power Control BB BER CC-CV DAC DCS Baseband Bit Error Ratio Constant Current - Only for Mobile Communications International Portable User Identity Intermediate Frequency LCD LDO LED OPLL Liquid Crystal Display Low Drop Output Light Emitting Diode Offset Phase... Locked Loop Copyright © 2007 LG Electronics. Constant Voltage Digital to Analog Converter Digital Communication System dBm DSP EEPROM ESD FPCB dB relative to 1 milli watt Digital...
Service Manual
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... Package (12x12mm), 0.65mm Ball pitch 5. LGE Internal Use Only Dallas) 4. Only for training and service purposes - 21 - The AD6720 baseband transmit section supports the following mobile station GMSK modulation power classes: • GSM 900/850 power classes 4 and 5, • DCS 1800 power classes 1 and 2, and • PCS 1900 power classes 1 and...
... Package (12x12mm), 0.65mm Ball pitch 5. LGE Internal Use Only Dallas) 4. Only for training and service purposes - 21 - The AD6720 baseband transmit section supports the following mobile station GMSK modulation power classes: • GSM 900/850 power classes 4 and 5, • DCS 1800 power classes 1 and 2, and • PCS 1900 power classes 1 and...
Service Manual
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Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes TROUBLE SHOOTING 4.2 RX Trouble CHECKING FLOW START HP8960 : Test mode 62 CH, 7 level setting (TCH) 62CH, -60dBm setting (BCCH) Spectrum analyzer setting Oscilloscope setting (1) Check VCTCXO (2) Check Mobile SW &FEM (3) Check RX IQ Redownload SW or Do calibration again LGE Internal Use Only - 42 - 4.
Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes TROUBLE SHOOTING 4.2 RX Trouble CHECKING FLOW START HP8960 : Test mode 62 CH, 7 level setting (TCH) 62CH, -60dBm setting (BCCH) Spectrum analyzer setting Oscilloscope setting (1) Check VCTCXO (2) Check Mobile SW &FEM (3) Check RX IQ Redownload SW or Do calibration again LGE Internal Use Only - 42 - 4.
Service Manual
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... 4-1(b) No Check Pin 4. 2.75V OK? TROUBLE SHOOTING (1) Checking VCTCXO Circuit TEST POINT X600.4 (VCC) X600 CIRCUIT CHECKING FLOW Check Pin 3. 26 MHzO.K? Refer to check Mobile SW Yes Changing X600 X600 (b) 2V75_VVCXO AFC R622 15K 1 VCONT OUT 3 C647 1000p 2 GND VCC 4 26MHz C648 (a) TG-5010LH-26M 2.2u EXSK0008101 WAVEFORM Graph 4-1(a) Copyright...
... 4-1(b) No Check Pin 4. 2.75V OK? TROUBLE SHOOTING (1) Checking VCTCXO Circuit TEST POINT X600.4 (VCC) X600 CIRCUIT CHECKING FLOW Check Pin 3. 26 MHzO.K? Refer to check Mobile SW Yes Changing X600 X600 (b) 2V75_VVCXO AFC R622 15K 1 VCONT OUT 3 C647 1000p 2 GND VCC 4 26MHz C648 (a) TG-5010LH-26M 2.2u EXSK0008101 WAVEFORM Graph 4-1(a) Copyright...
Service Manual
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4. All right reserved. TROUBLE SHOOTING (2) Checking FEM & Mobile SW TEST POINT SSWW560000..AANNTT SW600 SW600.RF VC_GSMV8C5_0E/EGGSSMM((VVCC21) VVCC__DDCCSSP/PCCSS((VVCC12) C630 CC663411 CIRCUIT FL600 FFLL660000.1.10 (C(6C3653)5) FFLL660000..512 (C(6C2642)4) WAVEFORM ... LOW LOW LOW Table 4-1 ANT_SW2 LOW HIGH LOW LOW LOW LGE Internal Use Only - 44 - Inc. Only for training and service purposes Copyright © 2007 LG Electronics.
4. All right reserved. TROUBLE SHOOTING (2) Checking FEM & Mobile SW TEST POINT SSWW560000..AANNTT SW600 SW600.RF VC_GSMV8C5_0E/EGGSSMM((VVCC21) VVCC__DDCCSSP/PCCSS((VVCC12) C630 CC663411 CIRCUIT FL600 FFLL660000.1.10 (C(6C3653)5) FFLL660000..512 (C(6C2642)4) WAVEFORM ... LOW LOW LOW Table 4-1 ANT_SW2 LOW HIGH LOW LOW LOW LGE Internal Use Only - 44 - Inc. Only for training and service purposes Copyright © 2007 LG Electronics.
Service Manual
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... GSM850) FL600.3(for EGSM) Pin 1,3: ~-62dBm No FL600.5(for DCS) Pin 5,7: ~-63dBm FL600.7(for training and service purposes - 45 - Only for PCS) Yes Ant SW & Mobile SW is OK See next Page to check Rx IQ Signal Changing FL600 For this RF Level test case, RX Stand alone Mode is needed... ANT,RF with No RF Cable Connected Check C630,C631 Check whether Ant SW Set as RX mode Refer to Chapter 10 Copyright © 2007 LG Electronics. LGE Internal Use Only Check SW600 Pin ANT,RF with RF Cable connected. All right reserved. 4.
... GSM850) FL600.3(for EGSM) Pin 1,3: ~-62dBm No FL600.5(for DCS) Pin 5,7: ~-63dBm FL600.7(for training and service purposes - 45 - Only for PCS) Yes Ant SW & Mobile SW is OK See next Page to check Rx IQ Signal Changing FL600 For this RF Level test case, RX Stand alone Mode is needed... ANT,RF with No RF Cable Connected Check C630,C631 Check whether Ant SW Set as RX mode Refer to Chapter 10 Copyright © 2007 LG Electronics. LGE Internal Use Only Check SW600 Pin ANT,RF with RF Cable connected. All right reserved. 4.
Service Manual
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TROUBLE SHOOTING 4.3 TX Trouble Checking Flow START HP8960 : Test mode 62 CH, 7 level setting (TCH) 62CH, -60dBm setting (BCCH) Spectrum analyzer setting Oscilloscope setting (1)Check VCTCXO (2)Check Mobile SW & FEM (3)Check PAM control signal (4)Check TX IQ Redownload SW or Do calibration again Copyright © 2007 LG Electronics. LGE Internal Use Only Only for training and service purposes - 47 - All right reserved. Inc. 4.
TROUBLE SHOOTING 4.3 TX Trouble Checking Flow START HP8960 : Test mode 62 CH, 7 level setting (TCH) 62CH, -60dBm setting (BCCH) Spectrum analyzer setting Oscilloscope setting (1)Check VCTCXO (2)Check Mobile SW & FEM (3)Check PAM control signal (4)Check TX IQ Redownload SW or Do calibration again Copyright © 2007 LG Electronics. LGE Internal Use Only Only for training and service purposes - 47 - All right reserved. Inc. 4.
Service Manual
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Only for training and service purposes Graph 4-1(b) Copyright © 2007 LG Electronics. Inc. Refer to Graph 4-1(a) No X600.3 (OUT) Check U101 Yes VCTCXO Circuit is OK See next Page to Graph 4-(b) No Check Pin 4. 2.75V OK? 4. Refer to check Mobile SW Yes Changing X600 CIRCUIT AFC R622 15K C647 X600 (b) 1 VCONT OUT 3 2 GND...
Only for training and service purposes Graph 4-1(b) Copyright © 2007 LG Electronics. Inc. Refer to Graph 4-1(a) No X600.3 (OUT) Check U101 Yes VCTCXO Circuit is OK See next Page to Graph 4-(b) No Check Pin 4. 2.75V OK? 4. Refer to check Mobile SW Yes Changing X600 CIRCUIT AFC R622 15K C647 X600 (b) 1 VCONT OUT 3 2 GND...
Service Manual
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TROUBLE SHOOTING (2) Checking Mobile SW & FEM TEST POINT SSWW560000..AANNT SW600 SW600.RF VC_GSMV8C5_0E/EGGSSMM((VVCC21)) VVCC__DDCCSSP/PCCSS((VVCC12) C630 C6C36141 FL500 Figure 8 FLF6L0600.10.10 (C6(3C56) 35) ... 17 C630 C631 39p 39p Waveform ANT_SW1(VC_GSM850/EGSM) Graph 5(a) GSM850/EGSM Tx mode ANT_SW1(VC_GSM850/EGSM) Graph 5(b) DCS,PCS Tx mode Copyright © 2007 LG Electronics. Only for training and service purposes - 49 - LGE Internal Use Only All right reserved. 4. Inc.
TROUBLE SHOOTING (2) Checking Mobile SW & FEM TEST POINT SSWW560000..AANNT SW600 SW600.RF VC_GSMV8C5_0E/EGGSSMM((VVCC21)) VVCC__DDCCSSP/PCCSS((VVCC12) C630 C6C36141 FL500 Figure 8 FLF6L0600.10.10 (C6(3C56) 35) ... 17 C630 C631 39p 39p Waveform ANT_SW1(VC_GSM850/EGSM) Graph 5(a) GSM850/EGSM Tx mode ANT_SW1(VC_GSM850/EGSM) Graph 5(b) DCS,PCS Tx mode Copyright © 2007 LG Electronics. Only for training and service purposes - 49 - LGE Internal Use Only All right reserved. 4. Inc.
Service Manual
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START Does waveform at NO R119 and R123 fluctuate? All right reserved. Copyright © 2007 LG Electronics. Inc. Only for training and service purposes Replace main board Resoldering receiver LGE Internal Use Only - 74 - YES NO Is receiver connected Properly? Set the receiving volume of audio as Max. TROUBLE SHOOTING CHECKING FLOW SETTING : After initialize Agilent 8960, Test GSM850,EGSM,DCS,PCS mode Set the property of mobile as PRBS or continuous wave. 4. YES Receiver will work properly.
START Does waveform at NO R119 and R123 fluctuate? All right reserved. Copyright © 2007 LG Electronics. Inc. Only for training and service purposes Replace main board Resoldering receiver LGE Internal Use Only - 74 - YES NO Is receiver connected Properly? Set the receiving volume of audio as Max. TROUBLE SHOOTING CHECKING FLOW SETTING : After initialize Agilent 8960, Test GSM850,EGSM,DCS,PCS mode Set the property of mobile as PRBS or continuous wave. 4. YES Receiver will work properly.
Service Manual
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... Test SIM Card PC (for training and service purposes - 113 - AUTO CALIBRATION 11. Equipment Setup Copyright © 2007 LG Electronics. All right reserved. GSM Test Set(8960) GPIB Cable Brand Agilent LG LG Agilent Agilent LG Mobile Switch Cable Power Supply GPIB Cable Figure 11-1. Auto-cal generates calibration data by communicating with Agilent 8960...
... Test SIM Card PC (for training and service purposes - 113 - AUTO CALIBRATION 11. Equipment Setup Copyright © 2007 LG Electronics. All right reserved. GSM Test Set(8960) GPIB Cable Brand Agilent LG LG Agilent Agilent LG Mobile Switch Cable Power Supply GPIB Cable Figure 11-1. Auto-cal generates calibration data by communicating with Agilent 8960...
Service Manual
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... INSULATOR 4 MPBG00 PAD,LCD 4 MPBZ00 PAD 4 MPFL00 PLATE,LIGHT GUIDE 4 MRAY00 RAIL 4 MTAB00 TAPE,PROTECTION 3 GMEY00 SCREW MACHINE,BIND 3 MBJA00 BUTTON,DIAL 3 MCCF00 CAP,MOBILE SWITCH 3 MLAK00 LABEL,MODEL 5 ADCA00 DOME ASSY,METAL 5 MGAD00 GASKET,SHIELD FORM 5 MLAZ00 LABEL Part Number Spec MTAB0145601 COMPLEX, (empty), , , , , MTAD0061901 COMPLEX,...59 45 47 46 LGE Internal Use Only - 122 - Inc. All right reserved. Copyright © 2007 LG Electronics. Only for training and service purposes 12. EXPLODED VIEW & REPLACEMENT PART LIST Level 5 Location No.
... INSULATOR 4 MPBG00 PAD,LCD 4 MPBZ00 PAD 4 MPFL00 PLATE,LIGHT GUIDE 4 MRAY00 RAIL 4 MTAB00 TAPE,PROTECTION 3 GMEY00 SCREW MACHINE,BIND 3 MBJA00 BUTTON,DIAL 3 MCCF00 CAP,MOBILE SWITCH 3 MLAK00 LABEL,MODEL 5 ADCA00 DOME ASSY,METAL 5 MGAD00 GASKET,SHIELD FORM 5 MLAZ00 LABEL Part Number Spec MTAB0145601 COMPLEX, (empty), , , , , MTAD0061901 COMPLEX,...59 45 47 46 LGE Internal Use Only - 122 - Inc. All right reserved. Copyright © 2007 LG Electronics. Only for training and service purposes 12. EXPLODED VIEW & REPLACEMENT PART LIST Level 5 Location No.