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LG KG280 Service Manual

Service manual
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Internal Use Only
Service Manual
MG280/KG280
4:11 am
05/01 Vie
Presione tecla Cáma
Date: August, 2007 / Issue 1.0

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  • Page 1 Internal Use Only Service Manual MG280/KG280 4:11 am 05/01 Vie Presione tecla Cáma Date: August, 2007 / Issue 1.0...

  • Page 2: Table Of Contents

    4.12 KEY backlight Trouble ......71 4.13 Receiver Trouble........73 4.14 Microphone Trouble ......75 4.15 RTC Trouble ........77 4.16 Slide on/off Trouble......79 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 3 - Only for training and service purposes...

  • Page 3: 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 4: Introduction

    The user may not make any changes and/or repairs expect as specifically noted in this manual. Therefore, note that unauthorized alternations or repair may affect the regulatory status of the system and may void any remaining warranty. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 5 -...

  • Page 5: Only For Training And Service Purposes

    • When returning system boards or parts like EEPROM to the factory, use the protective package as described. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 6 - Only for training and service purposes...

  • Page 6: Abbreviations

    International Portable User Identity Intermediate Frequency Liquid Crystal Display Low Drop Output Light Emitting Diode OPLL Offset Phase Locked Loop Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 7 - Only for training and service purposes...

  • Page 7: 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 8: Performance

    Vibrator Loud Speaker Voice Recoding Microphone Speaker/Receiver One way speaker Travel Adapter MIDI 64 Poly (Mono SPK) Camera Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 9 - Only for training and service purposes...

  • Page 9: Technical Specification

    8 dBm 22 dBm 6 dBm 20 dBm 4 dBm 18 dBm 2 dBm 16 dBm 0 dBm LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 10 - Only for training and service purposes...

  • Page 10: Only For Training And Service Purposes

    6,000 GSM850, EGSM Offset from Carrier (kHz) Max. (dBm) Output RF Spectrum (due to switching transient) 1,200 1,800 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 11 - Only for training and service purposes...

  • Page 11: Only For Training And Service Purposes

    * Mean that Adopt a straight line in between 300 Hz and 1,000 Hz to be Max. level in the range. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 12 - Only for training and service purposes...

  • Page 12: Only For Training And Service Purposes

    3.76 ~ 3.89 V 3.89 V ~ 3.63 0.03V (Call) every 1 minutes Low Voltage Warning 3.48 0.03V (Standby) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 13 - Only for training and service purposes...

  • Page 13: Only For Training And Service Purposes

    Capacity: 830mAh Switching-mode charger Travel Charger Input: 100 ~ 240 V, 50/60 Hz Output: 5.2 V, 800 mA LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 14 - Only for training and service purposes...

  • Page 14: Technical Brief

    The ENABLE input allows initial turn-on of PAM circuitry to minimize battery drain. Figure 1. Functional Block Diagram Figure1. Functional Block Diagram Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 15 - Only for training and service purposes...

  • Page 15: Only For Training And Service Purposes

    Power Control Bias Voltage GMD PAD Ground Pad, device underside Table 4. SKY77328 Pin Names and Signal Descriptions LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 16 - Only for training and service purposes...

  • Page 16: Transceiver (Ad6549, U601)

    A standard 3 wire serial interface is used to program the IC. The interface features low-voltage digital interface buffers compatible with logic levels from 1.6V to 2.9V. Figure 2 AD6549 Block Diagram Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 17 -...

  • Page 17: Only For Training And Service Purposes

    GSM 850 LNA input VLDO2 LO VCO Supply (3) RX850 GSM 850 LNA input Table 1 AD6548/9 Pin Descriptions LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 18 - Only for training and service purposes...

  • Page 18: Fem For Triband(Fl600)

    GSM900_RX_OUT2 GSM900_RX_OUT1 R616 100ohm ANT_SW2 GSM850_RX_OUT2 R617 100ohm ANT_SW1 GSM850_RX_OUT1 C630 C631 Figure 3- 2 FEM CIRCUIT DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 19 - Only for training and service purposes...

  • Page 19: 26 Mhz Clock (Vctcxo, X600)

    Midi(U204, YMU792) , BT Module(U702) 2V75_VVCXO X600 R622 VCONT C647 26MHz C648 1000p TG-5010LH-26M 2.2u EXSK0008101 Figure 3-3. VCTCXO CIRCUIT DIAGRAM LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 20 - Only for training and service purposes...

  • Page 20: Only For Training And Service Purposes

    • GSM 900/850 power classes 4 and 5, • DCS 1800 power classes 1 and 2, and • PCS 1900 power classes 1 and 2 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 21 -...

  • Page 21: Only For Training And Service Purposes

    3. TECHNICAL BRIEF Figure 3-4 SYSTEM INTERCONECTION OF AD6720 EXTERNAL INTERFACE LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 22 - Only for training and service purposes...

  • Page 22: Only For Training And Service Purposes

    Select 16bits or 8bits interface mode for MAIN LCD. IF_MODE For the future Table 3-2 . LCD CONTRON SIGNALS DISCRIPTION Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 23 - Only for training and service purposes...

  • Page 23: Only For Training And Service Purposes

    S_DATA (GPO 20) Serial Data to PLL S_CLK (GPO 21) Clock to PLL Table 3-4. RF CONTROL SIGNALS DESCRIPTION LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 24 - Only for training and service purposes...

  • Page 24: Only For Training And Service Purposes

    SIM_DATA SIM_CLK SIM_RST GND1 C318 C319 C316 C317 HSSC-6p-23 ENSY0014601 1000p 220n Figure 3-5. SIM Interface of AD6720 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 25 - Only for training and service purposes...

  • Page 25: Baseband Processor (Ad6720 , U101)

    - Output current: Max 800mA (50mA) 5. Battery - Li-ion battery (Max 4.2V, Nom 3.7V) - Standard battery: Capacity - 830mAh LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 26 - Only for training and service purposes...

  • Page 26: Only For Training And Service Purposes

    CHARGING C225 R212 C223 D200 4.7u CUS02 R213 Q200 GATEDRV ISENSE TPCF8102-TE85L-F Figure 3-6. CIRCUIT FOR BATTERY CHARGING Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 27 - Only for training and service purposes...

  • Page 27: Display And Interface

    - LCD_ID[2:3] : for the future using • For using 262K color, data buses should be 16 bits. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 28 - Only for training and service purposes...

  • Page 28: Only For Training And Service Purposes

    R111 VOUT R112 GND1 R113 LCD_LDO_EN GND2 4.7K R1114D281D-TR-F R115 100K C110 C112 Figure 3-7. LCD INTERFACE CIRCUIT Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 29 - Only for training and service purposes...

  • Page 29: Camera Ic(Ait701G , U401)

    YCbCr is real data interface signal. Figure 3-8. AIT701G BLOCK DIAGRAM Figure 3-9. SENSOR CHIP BLOCK DIAGRAM LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 30 - Only for training and service purposes...

  • Page 30: Only For Training And Service Purposes

    VDD_IO1 GND_IO0 GND_IO1 C422 R421 C427 C420 C423 100K CAM_PWR_EN STATUS HIGH DEACTIVE ACTIVE Figure 3-10. AIT701G CIRCUIT Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 31 - Only for training and service purposes...

  • Page 31: Keypad Switches And Scanning

    SW409 SW410 SW411 KEY_COL0 KEY_COL1 KEY_COL2 VA400 VA401 VA402 PG05DBTFC PG05DBTFC PG05DBTFC Figure 3-11. Keypad Switches and Scanning LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 32 - Only for training and service purposes...

  • Page 32: Only For Training And Service Purposes

    3. TECHNICAL BRIEF Touch-pad Switches and Scanning Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 33 - Only for training and service purposes...

  • Page 33: Microphone

    SPKP_P C131 C132 C133 C134 R125 C135 C136 AOUT2N1 AOUT2N2 AUXOP AOUT3P AUXOP AUXON AOUT3N AUXON TDO_ABB TDI_ABB LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 34 - Only for training and service purposes...

  • Page 34: Only For Training And Service Purposes

    MCLK RXIN FM_AUDIO_R RXIN_C3 TESTI0 TESTI1 EXTIN REC_P TESTI2 R225 TESTI3 INDEX C221 C222 Figure 3-13. MAIN SPEAKER Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 35 - Only for training and service purposes...

  • Page 35: Headset Interface

    USC5 USC5 EUSY0263301 MAX4764ETB U300 U301 SPK_SEL STATE HEADSET_EN STATE A-B0 A-B1 HEADSET_SPK Figure 3-14. HEADSET JACK INTERFACE LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 36 - Only for training and service purposes...

  • Page 36: Key Back-Light Illumination

    KEY_BACKLIGHT signal from AD6720. KEY BACKLIGHT VBAT VBAT Q400 IMX9T110 EDLH0012501 R417 KEY_BACKLIGHT Figure 3-15. KEY BACK-LIGHT ILLUMINTION Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 37 - Only for training and service purposes...

  • Page 37: Lcd Back-Light Illumination

    ECCH0004904 LCD_DIM_CTL EN_SET MLED1 MLED2 MLED3 C204 R204 C203 C205 C206 AAT3157ITP-T1 Figure 3-16. MAIN LCD BACKLIGHT ILLUMINATION LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 38 - Only for training and service purposes...

  • Page 38: Vibrator

    VIBRATOR L301 OUT300 27nH D300 EMZ2 C329 4.7u 1SS352-TPH3_F L302 OUT301 R324 27nH C335 7.5K Figure 3-17. MOTOR Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 39 - Only for training and service purposes...

  • Page 39: Bluetooth

    U703 GPIO7 VREG_CTL C708 TC7SH08FS 1000p PCM_TX_BT PCM_SYNC8_BT C709 C711 C713 USC3 C714 0.1u Figure 3-17. Bluetooth circuit LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 40 - Only for training and service purposes...

  • Page 40: Trouble Shooting

    U600 U601 X600 Figure 4-1 U600 Power Amp Module(SKY77318) U601(AD6549) RF Main Chip X600 VCTCXO, 26MHz Clock FL600 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 41 - Only for training and service purposes...

  • Page 41: Rx Trouble

    (1) Check VCTCXO (2) Check Mobile SW &FEM (3) Check RX IQ Redownload SW or Do calibration again LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 42 - Only for training and service purposes...

  • Page 42: Only For Training And Service Purposes

    (OUT) CIRCUIT 2V75_VVCXO X600 R622 VCONT C647 26MHz C648 1000p TG-5010LH-26M 2.2u EXSK0008101 WAVEFORM Graph 4-1(b) Graph 4-1(a) Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 43 - Only for training and service purposes...

  • Page 43: Only For Training And Service Purposes

    HIGH R616 100ohm ANT_SW2 GSM850_RX_OUT2 R617 100ohm ANT_SW1 GSM850_RX_OUT1 DCS/PCS_TX HIGH GSM_RX C630 C631 DCS_RX PCS_RX Table 4-1 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 44 - Only for training and service purposes...

  • Page 44: Only For Training And Service Purposes

    Rx IQ Signal For this RF Level test case, RX Stand alone Mode is needed refer to Chapter 10 - 45 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 45: Only For Training And Service Purposes

    Check if there is any Replace U601 Similar? Major difference Refer to graph 3 Redownload software and calibration again LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 46 - Only for training and service purposes...

  • Page 46: Tx Trouble

    (2)Check Mobile SW & FEM (3)Check PAM control signal (4)Check TX IQ Redownload SW or Do calibration again Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 47 - Only for training and service purposes...

  • Page 47: Only For Training And Service Purposes

    Figure 7 CIRCUIT 2V75_VVCXO X600 R622 VCONT C647 26MHz C648 1000p TG-5010LH-26M 2.2u EXSK0008101 WAVEFORM Graph 4-1(b) Graph 4-1(a) LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 48 - Only for training and service purposes...

  • Page 48: Only For Training And Service Purposes

    GSM900_RX_OUT2 ANT_SW1(VC_GSM850/EGSM) GSM900_RX_OUT1 R616 100ohm ANT_SW2 GSM850_RX_OUT2 R617 100ohm ANT_SW1 GSM850_RX_OUT1 C630 C631 Graph 5(b) DCS,PCS Tx mode Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 49 - Only for training and service purposes...
  • Page 49 Check SW600.ANT,RF Short Changing SW600 with RF Cable disconnected VC1_GSM850/EGSM VC2_DCS/PCS GSM850/EGSM_TX HIGH DCS/PCS_TX HIGH GSM/DCS/PCS RX Table 4-2 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 50 - Only for training and service purposes...

  • Page 50: Only For Training And Service Purposes

    Any Major Difference or not Refer to Graph 6 Go to Next Step Go to Next Step Go to Next Step Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 51 - Only for training and service purposes...

  • Page 51: Only For Training And Service Purposes

    Check if there is Replace U101 Similar? Any Major Difference Refer to Graph7 Redownload the Software And calibrate LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 52 - Only for training and service purposes...

  • Page 52: Power On Trouble

    VEXT01 C111 VMEM C112 2.2u VABB C113 VCORE C114 VMIC C115 VVCXO C116 VSIM DATA0 DATA00 DATA1 DATA01 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 53 - Only for training and service purposes...

  • Page 53: Only For Training And Service Purposes

    The power-on procedure is Completed. The problem may be elsewhere. THE PHONE WILL Replace the main board POWER ON. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 54 - Only for training and service purposes...

  • Page 54: Charging Trouble

    4.7u CUS02 R213 R214 Q201 Q200 GATEDRV R215 R216 PRE_CHARGE_R INDLED_R 1.5K 7.5K ISENSE R217 R218 UMX1NTN TPCF8102-TE85L-F Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 55 - Only for training and service purposes...

  • Page 55: Only For Training And Service Purposes

    0.7V < voltage(R212) < 1.3V? Q200 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. - 56 - Only for training and service purposes...

  • Page 56: Vibrator Trouble

    Q300 100ohm R322 VIBRATOR L301 OUT300 27nH D300 EMZ2 C329 1SS352-TPH3_F 4.7u L302 OUT301 R324 27nH C335 7.5K Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 57 - Only for training and service purposes...

  • Page 57: Only For Training And Service Purposes

    Resolder R319,R320 Replace Q300 Check the soldering Resolder vibrator of vibrator ? Replace vrbrator Vibrator Working well ! LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 58 - Only for training and service purposes...

  • Page 58: Lcd Trouble

    4. TROUBLE SHOOTING 4.7 LCD Trouble TEST POINT CN101 FL101 FL104 FL102 FL103 FL105 U103 Figure 14 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 59 - Only for training and service purposes...

  • Page 59: Only For Training And Service Purposes

    * NA : U103, C110 U103 R110 R111 VOUT R112 GND1 R113 LCD_LDO_EN GND2 4.7K R1114D281D-TR-F R115 100K C110 C112 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 60 - Only for training and service purposes...

  • Page 60: Only For Training And Service Purposes

    Resoldering EMI filter(FL101~FL105) EMI filter ? Does LCD work Replace LCD module properly ? LCD working well ! Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 61 - Only for training and service purposes...

  • Page 61: Camera Trouble

    4. TROUBLE SHOOTING 4.8 Camera Trouble TEST POINT FL202 FL201 FL203 U400 Figure 16 U401(AIT701G) Figure 17 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 62 - Only for training and service purposes...

  • Page 62: Only For Training And Service Purposes

    PMCLK PPXL_CLK C_PCLK VDD_IO0 VDD_IO1 GND_IO0 GND_IO1 C422 R421 C427 C420 C423 100K CAM_PWR_EN STATUS HIGH DEACTIVE ACTIVE Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 63 - Only for training and service purposes...

  • Page 63: Only For Training And Service Purposes

    Itís camera module's problem Replace the camera module Replace Check the signals of the FL201~FL203 FL201~FL203 Camera will work properly LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 64 - Only for training and service purposes...

  • Page 64: Speaker Trouble

    SDIN SPOUT1_B7 C219 0.068u MCLK RXIN FM_AUDIO_R RXIN_C3 TESTI0 TESTI1 EXTIN REC_P TESTI2 R225 TESTI3 INDEX C221 C222 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 65 - Only for training and service purposes...

  • Page 65: Only For Training And Service Purposes

    Check the soldering of U200 Check the state of Replace speaker contact of speaker Speaker Working well!! LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 66 - Only for training and service purposes...

  • Page 66: Sim Card Interface Trouble

    R303 J300 GND4 GND3 GND5 GND2 SIM_DATA SIM_CLK SIM_RST GND1 C318 C319 C316 C317 HSSC-6p-23 ENSY0014601 1000p 220n Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 67 - Only for training and service purposes...

  • Page 67: Only For Training And Service Purposes

    And try again. 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. - 68 - Only for training and service purposes...

  • Page 68: Earphone Trouble

    NLAS4157DFT2G R325 C302 PGND USC4 USC5 USC5 EUSY0263301 MAX4764ETB U300 U301 SPK_SEL STATE HEADSET_EN STATE A-B0 A-B1 HEADSET_SPK Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 69 - Only for training and service purposes...

  • Page 69: Only For Training And Service Purposes

    Does it work well? If not, check the U300, U301 Change the main board Earphone will work properly LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 70 - Only for training and service purposes...

  • Page 70: Key Backlight Trouble

    4. TROUBLE SHOOTING 4.12 KEY backlight Trouble TEST POINT R417 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 71 - Only for training and service purposes...

  • Page 71: Only For Training And Service Purposes

    Are all LEDs Check the soldering Working? each R and LED Replace or resoldering Backlight will work properly. component LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 72 - Only for training and service purposes...

  • Page 72: Receiver Trouble

    C131 C132 C133 C134 R125 C135 C136 AOUT2N1 AOUT2N2 AUXOP AOUT3P AUXOP AUXON AOUT3N AUXON TDO_ABB TDI_ABB TCK_ABB Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 73 - Only for training and service purposes...

  • Page 73: Only For Training And Service Purposes

    Does waveform at Replace main board R119 and R123 fluctuate? Is receiver connected Resoldering receiver Properly? Receiver will work properly. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 74 - Only for training and service purposes...

  • Page 74: Microphone Trouble

    VINNORP 100ohm C229 C228 R233 C230 R222 VINNORN 100ohm 0.1u R223 C231 C232 2.2K VA202 VA203 EVLC18S02003 EVLC18S02003 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 75 - Only for training and service purposes...

  • Page 75: Only For Training And Service Purposes

    Is it a few tens mV AC? Check the soldering of Resolder component R221, R222, C228, C230 Microphone will work properly. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 76 - Only for training and service purposes...

  • Page 76: Rtc Trouble

    KEYPADROW4 KEY_ROW4 R107 OSCIN OSCOUT 26M_DBB CLKIN R106 C118 100ohm 32.768KHz 1000p MC-146_7pF C120 C119 C141 C142 EXXY0004601 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 77 - Only for training and service purposes...

  • Page 77: Only For Training And Service Purposes

    R107 Check the soldering of R107. about 1.2V Replace X100and try again. RTC will work properly LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 78 - Only for training and service purposes...

  • Page 78: Slide On/Off Trouble

    4.16 Slide on/off Trouble TEST POINT U304 C327 CIRCUIT SLIDE 2V8_VEXT R317 SLIDE U304 C327 C328 A3212EELLT-T 0.1u Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 79 - Only for training and service purposes...

  • Page 79: Only For Training And Service Purposes

    Voltage at pin 1 of U304 = 0V Change Main board Does it work properly? Slide on/off will work properly LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 80 - Only for training and service purposes...

  • Page 80: Download

    5. DOWNLOAD 5. DOWNLOAD 5.1 Download A. Download Setup Figure 5-1 describes Download setup Figure 5-1. Download Setup Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 81 - Only for training and service purposes...
  • Page 81 5. DOWNLOAD B. Multi Download Procedure 1. Run GSM Multi Download program and select Setting LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 82 - Only for training and service purposes...
  • Page 82 2. Select Configuration from the menu and you may see this window 3. Press key to select DLL file and press Open Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 83 - Only for training and service purposes...
  • Page 83 5. Select AlchemyData.mot and press open 6. Repeat step 5-5 to select CodeData.mot LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 84 - Only for training and service purposes...
  • Page 84 7. Check if the ADI option is set to Hercules 8. Press OK to end Configuration Select Select Rate Hercules Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 85 - Only for training and service purposes...
  • Page 85 9. Press START to execute download 10. Once downloading is started, press STOP button to keep from re-downloading after downloading is completed. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 86 - Only for training and service purposes...

  • Page 86: Block Diagram

    Analog Ear-MIC Switch Data Cable Slide 0.3M Came ra Spea ker 1.77î LCD & Receiver Touch Charge Pump Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 87 - Only for training and service purposes...
  • Page 87 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 88 - Only for training and service purposes...

  • Page 88: Circuit Diagram

    USC6 TCK_ABB TDO1 TDO1 R126 C137 C139 C140 C138 0.1u TRACE32(14 Pin) OJ100 OJ101 LG(42)-A-5505-10:01 LG Electronics Inc. Copyright © 2007 LG Electronics. Inc. All right reserved. - 89 - LGE Internal Use Only Only for training and service purposes...
  • Page 89 R233 C230 R222 VINNORN 100ohm 0.1u R223 C231 C232 2.2K VA202 VA203 EVLC18S02003 EVLC18S02003 LGIC(42)-A-5505-10:01 LG Electronics Inc. LGE Internal Use Only - 90 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 90 C331 C332 C333 C334 ENZY0014301 OUT301 R324 C330 27nH VA302 100u C335 EVL5M02200 7.5K LGIC(42)-A-5505-10:01 LG Electronics Inc. Copyright © 2007 LG Electronics. Inc. All right reserved. - 91 - LGE Internal Use Only Only for training and service purposes...
  • Page 91 GND_IO0 GND_IO1 KEY_BACKLIGHT C422 R421 C427 C420 C423 100K CAM_PWR_EN STATUS HIGH DEACTIVE ACTIVE LGIC(42)-A-5505-10:01 LG Electronics Inc. LGE Internal Use Only - 92 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 92 INOUT_B1 L_DATA05 INOUT_A2 INOUT_B2 L_DATA03 INOUT_A3 INOUT_B3 INOUT_A4 INOUT_B4 L_DATA01 GND500 EVRC5S03Q050200R SFEY0014801 FL509 LGIC(42)-A-5505-10:01 LG Electronics Inc. Copyright © 2007 LG Electronics. Inc. All right reserved. - 93 - LGE Internal Use Only Only for training and service purposes...
  • Page 93 DCS_RX 6.8p PCS_RX 2V75_VVCXO X600 R622 VCONT C647 26MHz C648 1000p TG-5010LH-26M 2.2u EXSK0008101 LGIC(42)-A-5505-10:01 LG Electronics Inc. LGE Internal Use Only - 94 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 94 R716 USC_2 USC2 R715 R716 BT I/F BT not I/F 0 ohm 0 ohm LGIC(42)-A-5505-10:01 LG Electronics Inc. Copyright © 2007 LG Electronics. Inc. All right reserved. - 95 - LGE Internal Use Only Only for training and service purposes...
  • Page 95 R111 GND101 GND102 VOUT R112 GND1 R113 LCD_LDO_EN GND2 4.7K R1114D281D-TR-F R115 100K C110 C112 LG Electronics Inc. LGE Internal Use Only - 96 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 96 L_DATA01 L_MAIN_LCD_CS LCD_RS IF_MODE VSYNCOUT LCD_RESET LCD_DIM_CTL EVL5M02200 EVL5M02200 LCD_WR AXK7L70227J C215 C216 C217 ENBY0022801 LG Electronics Inc. Copyright © 2007 LG Electronics. Inc. All right reserved. - 97 - LGE Internal Use Only Only for training and service purposes...
  • Page 97 P1002 P1003 P3_1 P3_0 SENSE8 P1_7 XREX 3V3_VTOUCH R110 C104 33nF SENSE6 R102 TOUCH_CLK R103 TOUCH_DAT R104 TOUCH_INT LGE Internal Use Only - 98 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 98: Pcb Layout

    8. pcb layout MG280/KG280 Copyright © 2007 LG Electronics. Inc. All right reserved. - 99 - LGE Internal Use Only Only for training and service purposes...
  • Page 99 8. pcb layout MG280/KG280 LGE Internal Use Only - 100 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 100 8. pcb layout MG280/KG280 Copyright © 2007 LG Electronics. Inc. All right reserved. - 101 - LGE Internal Use Only Only for training and service purposes...
  • Page 101 8. pcb layout MG280/KG280 LGE Internal Use Only - 102 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 102 8. pcb layout MG280/KG280 Copyright © 2007 LG Electronics. Inc. All right reserved. - 103 - LGE Internal Use Only Only for training and service purposes...
  • Page 103 8. pcb layout MG280/KG280 LGE Internal Use Only - 104 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 104: Engineering Mode

    Buzzer Backlight Bluetooth on Vibrator Buzzer Bluetooth off Vibrator Key PAD MicSpkTest Battery Camera Audio Video Camera Bluetooth Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 105 - Only for training and service purposes...

  • Page 105: Bb Test [Menu 1]

    This menu is to test the vibration mode. 1) Vibrator on : Vibration mode is on. 2) Vibrator off : Vibration mode is off. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 106 - Only for training and service purposes...
  • Page 106 2) DAI UPLINK : Speech encoder test 3) DAI DOWNLINK : Speech decoder test 4) DAI OFF : DAI mode off Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 107 - Only for training and service purposes...

  • Page 107: Rf Test [Menu 2]

    [Soft2 Key]. If the key is working properly, name of the key is displayed on the screen. Test will be completed in 15 seconds automatically. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 108 - Only for training and service purposes...

  • Page 108: Trace Option [Menu 4]

    RF Calibration data, etc. cannot be restored again. 9.7 S/W version This displays software version stored in the phone. Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 109 - Only for training and service purposes...

  • Page 109: Stand Alone Test

    - See if the value of RSSI is close to -16dBm when setting the value between 0 ~ 26 in Gain Control Index. - Normal phone should indicate the value of RSSI close to -16dBm. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 110 - Only for training and service purposes...

  • Page 110: Means Of Test

    After setting them all above, press connect button. e. Press the start button Figure 10-1. HW test program Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 111 - Only for training and service purposes...
  • Page 111 10. STAND ALONE TEST Figure 10-2. HW test setting Figure 10-3. Ramping profile LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 112 - Only for training and service purposes...

  • Page 112: Auto Calibration

    Table 11-1. Calibration Equipment List. GSM Test Set(8960) GPIB Cable Mobile Switch Cable Power Supply GPIB Cable Figure 11-1. Equipment Setup Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 113 - Only for training and service purposes...

  • Page 113: Test Jig Operation

    Indicate data transfer state through the UART port LED 4 Indicate data transfer state through the MON port Table 11-4 LED Description LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 114 - Only for training and service purposes...

  • Page 114: Procedure

    1. Connect as Fig 11-2 (RS232 serial cable is connected between COM port of PC and MON port of TEST JIG, in general.) 2. Run HK_26.exe to start calibration. 3. From the Calibration SETTING->Logic Operation menu Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 115 - Only for training and service purposes...
  • Page 115 11. AUTO CALIBRATION 4. Set PORT COM1(useing RS232 cable) & Logic Mode 1 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 116 - Only for training and service purposes...
  • Page 116 11. AUTO CALIBRATION 5. Select MG280/KG280 and then Click Start Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 117 - Only for training and service purposes...

  • Page 117: Agc

    This procedure is for battery calibration. You can get main Battery Config Table and temperature Config Table will be reset. LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 118 - Only for training and service purposes...

  • Page 118: Exploded View & Replacement Part List

    24 25 26 27 12 13 14 3 4 5 33 34 20 21 23 16 17 53 54 55 Copyright © 2007 LG Electronics. Inc. All right reserved. - 119 - LGE Internal Use Only Only for training and service purposes...
  • Page 119 LGE Internal Use Only - 120 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes...

  • Page 120: Replacement Parts

    COMPLEX, (empty), , , , , Without Color MTAB00 TAPE,PROTECTION MTAB0145501 COMPLEX, (empty), , , , , Black Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 121 - Only for training and service purposes...
  • Page 121 MGAD0138301 COMPLEX, (empty), , , , , Without Color MLAZ00 LABEL MLAZ0038301 PID Label 4 Array Without Color LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 122 - Only for training and service purposes...

  • Page 122: Main Component

    POLYI ,0.2 mm,DOUBLE , ,; , , , , , , , , , SAEY00 PCB ASSY,KEYPAD SAEY0053601 SAEE00 PCB ASSY,KEYPAD,SMT SAEE0021501 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 123 - Only for training and service purposes...
  • Page 123 ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP C112 CAP,CERAMIC,CHIP ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 124 - Only for training and service purposes...
  • Page 124 MAIN ,1.77" (128*160) ,33.8*45.74*1.9 ,262k ,TFT ,TM SVLM00 LCD MODULE SVLM0023001 ,LGDP4513 , SAFY00 PCB ASSY,MAIN SAFY0198701 Black SAFB00 PCB ASSY,MAIN,INSERT SAFB0070101 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 125 - Only for training and service purposes...
  • Page 125 ECCH0000120 39 pF,50V,J,NP0,TC,1005,R/TP C131 CAP,CERAMIC,CHIP ECCH0000120 39 pF,50V,J,NP0,TC,1005,R/TP C132 CAP,CERAMIC,CHIP ECCH0000120 39 pF,50V,J,NP0,TC,1005,R/TP C133 CAP,CERAMIC,CHIP ECCH0000120 39 pF,50V,J,NP0,TC,1005,R/TP LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 126 - Only for training and service purposes...
  • Page 126 ECCH0000182 0.1 uF,10V ,K ,X5R ,HD ,1005 ,R/TP C324 CAP,CERAMIC,CHIP ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 127 - Only for training and service purposes...
  • Page 127 ECCH0000110 10 pF,50V,D,NP0,TC,1005,R/TP C612 CAP,CERAMIC,CHIP ECCH0000173 1.2 pF,16V ,B ,NP0 ,TC ,1005 ,R/TP C614 CAP,CERAMIC,CHIP ECCH0000120 39 pF,50V,J,NP0,TC,1005,R/TP LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 128 - Only for training and service purposes...
  • Page 128 0.1 uF,10V ,K ,X5R ,HD ,1005 ,R/TP C708 CAP,CERAMIC,CHIP ECCH0000143 1 nF,50V,K,X7R,HD,1005,R/TP C709 CAP,CERAMIC,CHIP ECCH0004904 1 uF,6.3V ,K ,X5R ,TC ,1005 ,R/TP Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 129 - Only for training and service purposes...
  • Page 129 10 Kohm,1/16W ,J ,1005 ,R/TP R111 RES,CHIP,MAKER ERHZ0000406 100 Kohm,1/16W ,J ,1005 ,R/TP R112 RES,CHIP,MAKER ERHZ0000527 200 ohm,1/6W ,J ,1005 ,R/TP LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 130 - Only for training and service purposes...
  • Page 130 10 Kohm,1/16W ,J ,1005 ,R/TP R318 RES,CHIP,MAKER ERHZ0000486 47 Kohm,1/16W ,J ,1005 ,R/TP R319 RES,CHIP,MAKER ERHZ0000401 0 ohm,1/16W ,J ,1005 ,R/TP Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 131 - Only for training and service purposes...
  • Page 131 1 Mohm,1/16W ,F ,1005 ,R/TP R621 RES,CHIP,MAKER ERHZ0000401 0 ohm,1/16W ,J ,1005 ,R/TP R622 RES,CHIP,MAKER ERHZ0000422 15 Kohm,1/16W ,J ,1005 ,R/TP LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 132 - Only for training and service purposes...
  • Page 132 VA400 DIODE,TVS EDTY0008501 TFSC ,5 V,50 W,R/TP ,small size VA401 DIODE,TVS EDTY0008501 TFSC ,5 V,50 W,R/TP ,small size Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 133 - Only for training and service purposes...
  • Page 133 ECZH0000826 27 pF,50V ,J ,NP0 ,TC ,1005 ,R/TP C405 CAP,CERAMIC,CHIP ECCH0000182 0.1 uF,10V ,K ,X5R ,HD ,1005 ,R/TP LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 134 - Only for training and service purposes...
  • Page 134 LD407 DIODE,LED,CHIP EDLH0012501 Snow White ,1608 ,R/TP ,color concept LD408 DIODE,LED,CHIP EDLH0012501 Snow White ,1608 ,R/TP ,color concept Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 135 - Only for training and service purposes...
  • Page 135 2x2 mm MLPD ,3 PIN,R/TP ,Hall Effect Switch, Pb Free VA200 VARISTOR SEVY0003901 5.5 V, ,SMD ,480pF, 1005 VA201 VARISTOR SEVY0003901 5.5 V, ,SMD ,480pF, 1005 LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved. - 136 - Only for training and service purposes...

  • Page 136: Accessory

    SSAD0022201 100-240V ,5060 Hz,4.8 V,0.9 A,NOM ,AC-DC ADAPTOR ADAPTOR,AC-DC SSAD0022202 100-240V ,5060 Hz,4.8 V,0.9 A,NOM ,AC DC ADAPTOR Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only - 137 - Only for training and service purposes...
  • Page 137 Note...
  • Page 138 Note...

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Mg280

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