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LG 512W, Service Manual

The LG 512W Service Manual is a comprehensive user manual designed to provide detailed instructions and guidance for operating and troubleshooting the LG 512W device. This manual is available for free download from manualshive.com, ensuring easy access to valuable information regarding the product's functionality and maintenance.

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     5

R50

RES,CHIP

ERHY0000201

1

0 ohm,1/16W,J,1005,R/TP

+

     5

R52

RES,CHIP

ERHY0000246

1

2K ohm,1/16W,J,1005,R/TP

+

     5

R54

RES,CHIP

ERHY0000241

1

1K ohm,1/16W,J,1005,R/TP

+

     5

R56

RES,CHIP

ERHY0000213

1

47 ohm,1/16W,J,1005,R/TP

+

     5

R57

RES,CHIP

ERHY0000280

1

100K ohm,1/16W,J,1005,R/TP

+

     5

R59

RES,CHIP

ERHY0000213

1

47 ohm,1/16W,J,1005,R/TP

+

     5

R61

RES,CHIP

ERHY0000278

1

82K ohm,1/16W,J,1005,R/TP

+

     5

R63

RES,CHIP

ERHY0000244

1

1.5K ohm,1/16W,J,1005,R/TP

+

     5

R64

RES,CHIP

ERHY0000280

1

100K ohm,1/16W,J,1005,R/TP

+

     5

R65

RES,CHIP

ERHY0000241

1

1K ohm,1/16W,J,1005,R/TP

+

     5

R66

RES,CHIP

ERHY0000241

1

1K ohm,1/16W,J,1005,R/TP

+

     5

R67

RES,CHIP

ERHY0000241

1

1K ohm,1/16W,J,1005,R/TP

+

     5

R68

RES,CHIP

ERHY0000241

1

1K ohm,1/16W,J,1005,R/TP

+

     5

R69

RES,CHIP

ERHY0000241

1

1K ohm,1/16W,J,1005,R/TP

+

     5

R7

RES,CHIP

ERHY0000220

1

100 ohm,1/16W,J,1005,R/TP

+

     5

R70

RES,CHIP

ERHY0000241

1

1K ohm,1/16W,J,1005,R/TP

+

     5

R71

RES,CHIP

ERHY0000241

1

1K ohm,1/16W,J,1005,R/TP

+

     5

R72

RES,CHIP

ERHY0000241

1

1K ohm,1/16W,J,1005,R/TP

+

     5

R73

RES,CHIP

ERHY0000241

1

1K ohm,1/16W,J,1005,R/TP

+

     5

R74

RES,CHIP

ERHY0000241

1

1K ohm,1/16W,J,1005,R/TP

+

     5

R75

RES,CHIP

ERHY0000241

1

1K ohm,1/16W,J,1005,R/TP

+

     5

R76

RES,CHIP

ERHY0000241

1

1K ohm,1/16W,J,1005,R/TP

+

     5

R77

RES,CHIP

ERHY0000241

1

1K ohm,1/16W,J,1005,R/TP

+

     5

R78

RES,CHIP

ERHY0000273

1

47K ohm,1/16W,J,1005,R/TP

+

     5

R79

RES,CHIP

ERHY0000261

1

10K ohm,1/16W,J,1005,R/TP

+

     5

R8

RES,CHIP

ERHY0000220

1

100 ohm,1/16W,J,1005,R/TP

+

     5

R80

RES,CHIP

ERHY0000201

1

0 ohm,1/16W,J,1005,R/TP

+

     5

R81

RES,CHIP

ERHY0000249

1

2.7K ohm,1/16W,J,1005,R/TP

+

     5

R82

RES,CHIP

ERHY0000261

1

10K ohm,1/16W,J,1005,R/TP

+

     5

R83

RES,CHIP

ERHY0000261

1

10K ohm,1/16W,J,1005,R/TP

+

     5

R84

RES,CHIP

ERHY0000273

1

47K ohm,1/16W,J,1005,R/TP

+

     5

R87

RES,CHIP

ERHY0000280

1

100K ohm,1/16W,J,1005,R/TP

+

     5

R88

RES,CHIP

ERHY0000280

1

100K ohm,1/16W,J,1005,R/TP

+

     5

R89

RES,CHIP

ERHY0000280

1

100K ohm,1/16W,J,1005,R/TP

+

     5

R9

RES,CHIP

ERHY0000220

1

100 ohm,1/16W,J,1005,R/TP

+

     5

R90

RES,CHIP

ERHY0000246

1

2K ohm,1/16W,J,1005,R/TP

+

     5

R92

RES,CHIP

ERHY0000213

1

47 ohm,1/16W,J,1005,R/TP

+

     5

R93

RES,CHIP

ERHY0000213

1

47 ohm,1/16W,J,1005,R/TP

+

     5

R94

RES,CHIP

ERHY0000213

1

47 ohm,1/16W,J,1005,R/TP

+

     5

R95

RES,CHIP

ERHY0000220

1

100 ohm,1/16W,J,1005,R/TP

+

     5

R96

RES,CHIP

ERHY0000220

1

100 ohm,1/16W,J,1005,R/TP

+

     5

R98

RES,CHIP

ERHY0000280

1

100K ohm,1/16W,J,1005,R/TP

-

     5

R99

RES,CHIP

ERHY0000280

1

100K ohm,1/16W,J,1005,R/TP

-

     5

RA3

RES,ARRAY,R

ERNR0000401

1

47 ohm, ohm,8 PIN,J ,1/32 W ,SMD ,R/TP

+

     5

S2

SWITCH,TACT

ESCY0000702

1

12 V,50 mA,HORIZONTAL , G,LIGHT TOUCH SWITCH / 4 PIN

+

     5

S3

SWITCH,TACT

ESCY0000702

1

12 V,50 mA,HORIZONTAL , G,LIGHT TOUCH SWITCH / 4 PIN

+

     5

S4

SWITCH,TACT

ESCY0000702

1

12 V,50 mA,HORIZONTAL , G,LIGHT TOUCH SWITCH / 4 PIN

+

     5

SPFY00

PCB,MAIN

SPFY0022509

1

FR-4 ,.9 mm,MULTI-8 ,VER 1.4 PCB_VER_1.8

     5

SW301

CONN,RF SWITCH

ENWY0000101

1

ANGLE ,SMD ,0.5 dB,

+

     5

U1

IC

EUSY0100401

1

TSSOP ,28 PIN,R/TP ,GSM POWER MANAGEMENT SYSTEM

+

     5

U2

IC

EUSY0100701

1

64 BALL LFBGA / MINI-BGA ,64 PIN,R/TP ,DUAL-MODE VOICEBAND BASEBAND CODEC / AD20MSP4-

     5

U3

IC

EUSY0100601

1

160 PIN MINI-BGA ,160 PIN,R/TP ,GSM DIGITAL BASEBAND / AD20MSP430

-

     5

U301

IC

EUSY0100301

1

TQFP ,56 PIN,R/TP ,GSM/DCS1800 RF TRANSCEIVER

+

     5

U302

IC

EUSY0098301

1

MLP ,28 PIN,R/TP ,5*5/ DUAL BAND RF SYNTHE/ MICRO LEADFRAME PACKAGE

+

     5

U303

IC

EUSY0100101

1

RF-K ,12 PIN,R/TP ,RF POWER AMPLIFIER

+

     5

U304

IC

EUSY0100001

1

8-LEAD MICRO SO ,8 PIN,R/TP ,50 DB GSM PA CONTROLLER

+

     5

U305

COUPLER,RF HYBRID

SCHY0000101

1

19.0 dB,0.35 dB,24.0 dB,2.0*1.25*0.95 ,SMD ,DUAL COUPLER

+

     5

U306

IC

EUSY0100501

1

5-LEAD SC70 ,5 PIN,R/TP ,UHS 2-INPUT AND GATE

+

     5

U307

IC

EUSY0100501

1

5-LEAD SC70 ,5 PIN,R/TP ,UHS 2-INPUT AND GATE

+

     5

U308

IC

EUSY0077201

1

SOT(DCK) ,5 PIN,R/TP ,

+

     5

U309

IC

EUSY0076701

1

SOT-23-6 ,6 PIN,R/TP ,

+

     5

U4

IC

EUSY0129501

1

SC-74A FIT ,3 PIN,R/TP ,HALL EFFECT SWITCH

+

     5

U6

TR,FET,P-CHANNEL

EQFP0003301

1

SOT-6 ,1.6 W,30 V,2.4 A,R/TP ,use for charge  P- CHANNEL  FET

+

     5

U7

IC

EUSY0101502

1

68-BALL STACKED-CSP ,68 PIN,R/TP ,14 X 8 MATRIX / 32-FLASH / 08-SRAM / 70 NS

-

     5

U8

IC

EUSY0077301

1

SC70-6/SOT23-6 ,6 PIN,R/TP ,

+

     5

U9

DIODE,SWITCHING

EDSY0005701

1

EMT3 ,80 V,4 A,R/TP ,

+

     5

V3

RES,VARIABLE,ETC

ERVZ0000101

1

ohm, PIN, ,SMD ,R/TP ,1005 SIZE CHIP VARISTOR

+

     5

V4

RES,VARIABLE,ETC

ERVZ0000101

1

ohm, PIN, ,SMD ,R/TP ,1005 SIZE CHIP VARISTOR

+

     5

X1

X-TAL

EXXY0004601

1

0.32768 MHz,20 PPM,12.5 pF,65000 ohm,SMD ,6.9*1.4*1.3 ,

+

     5

X301

VCO

EXSC0004501

1

0897 MHz, PPM, pF,SMD ,9.0*7.0*1.6 ,EGSM/DCS DUAL BAND VCO

+

     5

X302

VCTCXO

EXSK0000801

1

13.0 MHz, PPM,10 pF,SMD ,5.0*3.2*1.5 ,

+

   3

SUMY00

MICROPHONE

SUMY0003502

1

FPCB ,-40 dB,6*1.8 ,TOLLE-2 dB

+

  2

MBAD00

BAG,VINYL(PE)

MBAD0002901

1

LOWDENSITY POLYETHYLENE(t=0.05mm)

  2

MBEE00

BOX,MASTER

MBEE0019701

.05

LG-510W RUSSIA

-

  2

MBEF00

BOX,UNIT

MBEF0024801

1

LG-512W(RUS)

  2

MCDF00

CARD,WARRANTY

MCDF0001301

1

Russia for common use

  2

MHBY00

HANDSTRAP

MHBY0001101

1

Neck Strap 400mm (CDMA,common use)

+

  2

MLAC00

LABEL,BARCODE

MLAC0000801

.05

84 x 203.5

-

  2

MLAQ00

LABEL,UNIT BOX

MLAQ0001601

1

  2

MMBB00

MANUAL,OPERATION

MMBB0059901

1

New,512W,Russia,User's manual

  2

MPAD00

PACKING,SHELL

MPAD0001001

1

  2

SBPP00

BATTERY PACK,LI-POLYMER

SBPP0004023

1

3.7 V,630 mAh,1 CELL,PRISMATIC ,STD510-BATTERY PACK (RUSSIA-SV)

+

M8

  2

SGEY00

EAR PHONE/EAR MIKE SET

SGEY0002301

1

LG-G510 ,

+

  2

SNGF00

ANTENNA,GSM,FIXED

SNGF0000601

1

1.5 ,-2.5 dBd,P427C ,G510 ANTENNA (PANTONE 427C)

+

M13

  2

SSAD00

ADAPTOR,AC-DC

SSAD0007803

1

100-240V ,50 Hz,5.2 V,850 mA,GOST ,

+

Summary of Contents for 512W

Page 1: ...GSM Phone SERVICE MANUAL MODEL LG 512W SERVICE MANUAL MODEL LG 512W ...

Page 2: ... 10 Indicator LED Trouble 48 4 11 Backlight LED Trouble 50 4 12 Folder on off Trouble 51 4 13 SIM Detect Trouble 52 4 14 Earphone Trouble 53 4 15 HFK Trouble 55 5 TEST POINT DATA 57 6 STAND ALONE TEST 74 6 1 Introduction 74 6 2 Setting Method 74 6 3 Means of Test 74 7 AUTO CALIBRATION 75 7 1 Overview 75 7 2 Requirements 75 7 3 Menu and settings 75 7 4 AGC 77 7 5 APC 77 7 6 ADC 77 7 7 Setting 77 7 ...

Page 3: ...OM will not be responsible for any charges that result from such unauthorized use B Incidence of Harm If a telephone company determines that the equipment provided to customer is faulty and possibly causing harm or interruption in service to the telephone network it should disconnect telephone service until repair can be done A telephone company may temporarily disconnect service as long as repair...

Page 4: ...pment medical equipment etc Interference from unsuppressed engines or electric motors may cause problems H Electrostatic Sensitive Devices ATTENTION Boards which contain Electrostatic Sensitive Device ESD are indicated by the sign Following information is ESD handling Service personnel should ground themselves by using a wrist strap when exchange system boards When repairs are made to a system boa...

Page 5: ...ift Keying GPIB General Purpose Interface Bus GPRS General Packet Radio Service GSM Global System for Mobile Communications IPUI International Portable User Identity IF Intermediate Frequency LCD Liquid Crystal Display LDO Low Drop Output LED Light Emitting Diode LG 510W LG GSM Phone LGE LG Electronics OPLL Offset Phase Locked Loop PAM Power Amplifier Module PCB Printed Circuit Board PGA Programma...

Page 6: ... Time Division Duplex TDMA Time Division Multiple Access UART Universal Asynchronous Receiver Transmitter VCO Voltage Controlled Oscillator VCTCXO Voltage Control Temperature Compensated Crystal Oscillator WAP Wireless Application Protocol ...

Page 7: ...me 2 hours RX Sensitivity GSM EGSM 108 dBm DCS 107 dBm TX output power GSM EGSM 32 dBm Level 5 DCS 29 5 dBm Level 0 GPRS compatibility Yes SIM card type 3V only Display 128 128 dots LCD 4 Gray color Soft icons Key Pad Status Indicator 0 9 Navigation Key Up Down Side Key Side Key Confirm Key Record Key Send Key END PWR Key Antenna External EAR Phone Jack Using I O connector PC Synchronization Yes S...

Page 8: ... 0 1 ppm GSM EGSM Level Power Toler Level Power Toler 5 33 dBm 2dB 13 17 dBm 3dB 6 31 dBm 3dB 14 15 dBm 3dB 7 29 dBm 3dB 15 13 dBm 3dB 8 27 dBm 3dB 16 11 dBm 5dB 9 25 dBm 3dB 17 9 dBm 5dB 10 23 dBm 3dB 18 7 dBm 5dB 11 21 dBm 3dB 19 5 dBm 5dB 4 Power Level 12 19 dBm 3dB DCS Level Power Toler Level Power Toler 0 30 dBm 2dB 8 14 dBm 3dB 1 28 dBm 3dB 9 12 dBm 4dB 2 26 dBm 3dB 10 10 dBm 4dB 3 24 dBm 3d...

Page 9: ... to modulation DCS Offset from Carrier kHz Max dBc 100 0 5 200 30 250 33 400 60 600 1 200 60 1 200 1 800 60 1 800 3 000 65 3 000 6 000 65 6 000 73 GSM EGSM Offset from Carrier kHz Max dBm 400 19 600 21 1 200 21 6 Output RF Spectrum 1 800 24 due to switching transient DCS Offset from Carrier kHz Max dBm 400 22 600 24 1 200 24 1 800 27 7 Spurious Emissions Conduction Emission Status Conduction Emiss...

Page 10: ...4 6 3 400 4 9 4 000 0 12 RLR 2 3 dB Frequency Hz Max dB Min dB 100 12 200 0 300 2 7 500 5 13 Receiving Response 1 000 0 5 3 000 2 5 3 400 2 10 4 000 2 Mean that Adopt a straight line in between 300 Hz and 1 000 Hz to be Max level in the range 14 STMR 13 5 dB 15 Stability Margin 6 dB dB to ARL dB Level Ratio dB 35 17 5 30 22 5 16 Distortion 20 30 7 10 33 3 0 33 7 7 31 7 10 25 5 17 Side tone Distort...

Page 11: ...above 5 Backlight of phone set off At least 80 dB under below conditions 23 Ringer Volume 1 Ringer set as ringer 2 Test distance set as 50 cm 24 Charge Voltage Fast Charge 500 mA Slow Charge 60 mA Antenna Bar Number Power 5 85 dBm 4 90 dBm 86 dBm 25 Antenna Display 3 95 dBm 91 dBm 2 100 dBm 96 dBm 1 105 dBm 101 dBm 0 105 dBm Batter Bar Number Voltage 0 3 62 V 26 Battery Indicator 1 3 62 3 73 V 2 3...

Page 12: ...ption of RF PLL VCO U302 and discrete RF SAW filters The filtered and amplified signal is processed from the RF mixer inputs to the baseband BB output The receiver path is supported by external channel filtering The RF front end circuit is shown Fig 3 1 Figure 3 1 RF Front end Circuit Note Please refer to chapter8 Circuit Diagram for more details ...

Page 13: ...e HD155128TF U301 for mixing with LO which is produced by the synthesizer Si4133G_XM2 U302 The mixers are implemented as Gilbert cells and the first receiver mixer block contains four mixer cells whose outputs are combined at the MIX1OUT OUTB pins The four mixer cells provide high or low conversion gain at 900MHz or 1800MHz The two high gain cells have been optimized for to meet the System require...

Page 14: ... of the BB I Q outputs with respect to the incoming RF signal on both GSM900 and DCS1800 It is not necessary to invert the receive data within the BB when switching between 900MHz and 1800MHz Fig 3 2 shows RX path circuit Figure 3 2 RX Path Circuit Table 3 2 Gain and Noise Figure of RX Path Table 3 3 Total Gain and Noise Figure of RX Path Front End Module LAN RF SAW Filter Mixerl IF SAW Filter Mix...

Page 15: ... output current drive capability and pulse width The counter and mode settings of the synthesizer are also programmed via 3 wire interface Table 3 4 Synthesizer 3 wire Bus The PLLs can adjust the IF and RF output frequencies 5 with respect to their VCO center frequencies Each center frequency is established by the value of an external inductance connected to the respective VCO Because the inductan...

Page 16: ...ble 3 6 Si4133G XM2 VCO Characteristics Figure 3 3 Synthesizer Internal Block Diagram Fcen Range MHz Cnom pF Lpkg nH Lext Range nH Min Max Min Max RF1 947 1720 4 3 1 5 0 5 5 1 RF2 789 1429 4 8 1 5 1 1 7 0 IF 1080 6 5 1 6 1 7 ...

Page 17: ... upon which N divider register was last written to The RFOUT pin must be coupled to its load through an ac coupling capacitor A matching network is required to maximize power delivered into a 50 Ω load The network is made to provide an adequate match to an external 50ohm load for both the RF1 and RF2 frequency bands The matching network also filters the output signal to reduce harmonic distortion ...

Page 18: ...and transmit VCO which can operate at either final RF output frequency The RF GMSK outputs from the transmit VCO are fed directly to the RF power amplifiers The peak output power and the profile of the transmitted burst are controlled by means of a closed feedback loop A dual band directional coupler is used to sample the RF output from either PA The PA outputs from the directional coupler pass to...

Page 19: ...factor of 4 for GSM TX or 8 for DCS TX This division factor is set by the control signal of BB digital chipset AD6522 U3 D14 D13 F11 The modulator provides more than 40 dBc of carrier and unwanted side band rejection and produces a GMSK modulated signal The BB software is able to cancel out differential DC offsets in the I Q BB signals caused by imperfections in the D A converters The TX Modulator...

Page 20: ...uency of the transmit VCO is offset from the RF VCO frequency by 270 MHz for GSM and EGSM operation or 135 MHz for DCS operation Hence GSM TX RF VCO 270 i e 1 150 270 880 MHz 3 4 DCS TX RF VCO 135 i e 1 575 135 1 710 MHz 3 5 The OPLL acts as a tracking narrowband band pass filter tuned to the desired channel frequency This reduces the wideband noise floor of the modulation and up conversion proces...

Page 21: ...nse voltage is peak detected using an on chip Schottky diode inside of AD8315 U304 This detected voltage is compared to the DAC voltage at the VSET pin of APC IC U304 to control the output power An internal input signal TXRAMP from AD6521 U2 is applied to the positive input of the APC IC U304 during the TXEN mode and a directional coupler near the antenna feeds a portion of the RF output signal ba...

Page 22: ...AD6521 AD6522 and Si4133G_XM2 Figure 3 8 VCTCXO Circuit 3 5 Power Supplies and Control Signals There are two regulators used in the phone to provide RF power One is contained inside of ADP3408 U1 power management IC to provide the power for the VCTXO X302 The other is used to provide the power for remaining RF circuits Table 3 7 Power Supplies Figure 3 9 Regulator Circuit Regulator Voltage Powers ...

Page 23: ...3 TECHNICAL BRIEF 22 3 6 Digital Main Processor Figure 3 10 System Interconnection of the AD6522 External Interfaces ...

Page 24: ...trol RF parts through TXEN RXON1 RXON2 AGCEN SDATA SCLK SEN etc Table 3 9 RF Interface Description LCD_CS LCD chip enable LCD_RES This pin resets LCD module LCD_A0 This pin determines whether the data to LCD module is display data or control data WR RD Read Write control DATA 00 07 Parallel data line Signal Name Description TXEN TX Enable Disable RXON1 LNA Mixer1 On Off RXON2 Mixer 2 On Off AGCEN ...

Page 25: ...interface Include 5 column and 5 row The AD6522 detect key press by interrupt F AD3408 interrupt There are two interrupts EOC and CHARGERDETECT EOC End Of Charge Charging would be stopped when AD6522 receive this interrupt CHARGERDETECT This interrupt is generated when charger is inserted Description SIM_IO This pin receives and sends data to SIM card LG 512W support only 3 0 volt interface SIM ca...

Page 26: ...Auxiliary section This section contains two auxiliary DACs AFC DAC IDAC for system control This section also contains AUX ADC and Voltage Reference AUX ADC 6 channel 10 bits AFC DAC 13 bits IDAC 10 bits D Voiceband section Receive audio signal from MIC LG 512W use differential configuration Send audio signal to Speaker LG 512W use differential configuration It interconnect with external device lik...

Page 27: ...3 TECHNICAL BRIEF 26 3 8 Power Management ADP3408 Figure 3 12 ADP3408 Inner Block Diagram ...

Page 28: ...is inserted the CC CV charging starts Exception When battery voltage is lower than 3 2V the precharge low current charge mode starts firstly And the battery voltage reach to 3 2V the CC CV charging starts F Pins used for charging CHARGERDETECT Interrupt to the AD6522 when charger is plugged CHARGEEN Control signal from the AD6522 to charge Li battery EOC Interrupt to the AD6522 when battery is ful...

Page 29: ... 07 pins to send data for displaying graphical text onto the LCD 3 11 Keypad Switches and Scanning The key switches are metal domes which make contact between two concentric pads on the keypad layer of the PCB when pressed There are 24 switches S1 S24 connected in a matrix of 5 rows by 5 columns as shown in Figure except for the power switch S1 which is connected independently Functions the row an...

Page 30: ...3 TECHNICAL BRIEF 29 Figure 3 13 Keypad Switches and Scanning ...

Page 31: ... signal is then A D converted by the Voiceband ADC part of the AD6521 The digitized speech is then passed to the DSP section of the AD6522 for processing coding interleaving etc Figure 3 14 Microphone 3 13 Earpiece The earpiece is driven directly from the AD6521 VOUTNORP J10 and VOUTNORN K10 pins and the gain is controlled by the PGA in the AD6521 The earpiece is located in the handset folder fron...

Page 32: ...o carkit connector CN3 at the base of the handset The DC level of the signal is supplied to the VOUTAUX pin And the EXT_IN signal is then input to the VINAUXP H10 and VINAUXN G10 of the AD6521 3 15 Buzzer Driver The buzzer is a piezo electric transducer which is driven by a pulse width square wave from the BUZ1 output of the AD6522 Q3 amplify the signal in order to achieve the specified loudness F...

Page 33: ...ard which are driven by KEY_BACKLIGHT line from the AD6522 Figure 3 17 Key Back light Illumination 3 17 LCD Back light Illumination In LCD back light illumination there is an EL driver in FPCB Board and EL sheet in LCD Module which is driven by LCD_BACKLIGHT line from the AD6522 Figure 3 18 LCD Back light Illumination ...

Page 34: ...4 TROUBLE SHOOTING 33 4 TROUBLE SHOOTING Fig 4 1 shows a measurement set up Figure 4 1 Measurement Set up ...

Page 35: ...4 1 RX Trouble 4 TROUBLE SHOOTING 34 ...

Page 36: ...4 TROUBLE SHOOTING 35 RX Level Check EGSM ...

Page 37: ...4 TROUBLE SHOOTING 36 RX Level Check DCS ...

Page 38: ...4 2 TX Trouble 4 TROUBLE SHOOTING 37 ...

Page 39: ...4 TROUBLE SHOOTING 38 TX Level Check ...

Page 40: ... the back housing carefully 2 Use a soldering station to detach the soldered parts of main PCB and FPCB 3 Then remove the main PCB from the housing 4 Set a hitting gun at 500 Then switch on the power and wait for 5 minutes 5 Place the hitting gun 1 cm away from the top end of a PAM for 5 minutes After hitting it up use tweezers pincette to hold both the sides of a PAM and lift it up carefully 6 Us...

Page 41: ...4 TROUBLE SHOOTING 40 4 3 Power on Trouble ...

Page 42: ...4 TROUBLE SHOOTING 41 ...

Page 43: ...4 TROUBLE SHOOTING 42 4 4 Charge Trouble ...

Page 44: ...4 TROUBLE SHOOTING 43 4 5 LCD Trouble ...

Page 45: ...4 TROUBLE SHOOTING 44 4 6 Receiver Trouble ...

Page 46: ...4 TROUBLE SHOOTING 45 4 7 Buzzer Trouble ...

Page 47: ...4 TROUBLE SHOOTING 46 4 8 MIC Trouble ...

Page 48: ...4 TROUBLE SHOOTING 47 4 9 Vibrator Trouble ...

Page 49: ...4 TROUBLE SHOOTING 48 4 10 Indicator LED Trouble ...

Page 50: ...4 TROUBLE SHOOTING 49 ...

Page 51: ...4 TROUBLE SHOOTING 50 4 11 Backlight LED Trouble ...

Page 52: ...4 12 Folder on off Trouble 4 TROUBLE SHOOTING 51 ...

Page 53: ...4 13 SIM Detect Trouble 4 TROUBLE SHOOTING 52 ...

Page 54: ...4 14 Earphone Trouble 4 TROUBLE SHOOTING 53 ...

Page 55: ...4 TROUBLE SHOOTING 54 ...

Page 56: ...4 TROUBLE SHOOTING 55 4 15 HFK Trouble ...

Page 57: ...4 TROUBLE SHOOTING 56 ...

Page 58: ...s taken with other test equipment and leads Lead and connector losses should always be taken into account when performing such RF measurements Testing Receiver Using a suitable high frequency probe measure the RF levels at the relevant points shown in Fig 5 3 and compare your measurements with those shown in the diagram If there are any major difference between the readings taken and those indicat...

Page 59: ...en with other test equipment and leads Lead and connector losses should always be taken into account when performing such RF measurements Testing Transmitter Using a suitable high frequency probe measure the RF levels at the relevant points shown in Fig 5 4 5 and compare your measurements with those shown in the diagram If there are any major difference between the readings taken and those indicat...

Page 60: ...Reference Reference U301 RF main chipset X301 TXVCO U302 PLL X302 VCTCXO U303 PAM FL301 FEM U305 Coupler FL302 GSM RF SAW Filter U306 307 AND Gate FL303 DCS RF SAW Filter U308 Inverter FL304 IF SAW Filter U309 LDO SW301 Mobile Switch SW301 U305 U307 U303 FL301 U301 X301 X302 U302 U306 U308 U309 FL304 FL302 FL303 ...

Page 61: ... RF Components Keypad Side Figure 5 2 RF Components Keypad Side 5 TEST POINT DATA 60 U304 APCIC ...

Page 62: ...5 TEST POINT DATA 61 Test Point of RX Levels Figure 5 3 Test Point of RX Levels 8 9 1 10 11 2 3 5 13 4 12 7 15 6 14 ...

Page 63: ...5 TEST POINT DATA 62 Figure 5 4 Receiver RF Levels GSM CH 62 60dBm DCS CH 699 60dBm ...

Page 64: ...5 TEST POINT DATA 63 Test Point of TX Levels 1 Figure 5 5 Test Point of TX Levels 1 11 9 18 20 8 7 16 4 13 17 1 3 5 14 2 6 15 12 21 ...

Page 65: ... Test Point of TX Levels 2 Figure 5 6 Test Point of TX Levels 2 5 TEST POINT DATA 64 10 19 ...

Page 66: ...5 TEST POINT DATA 65 GSM Pwr LvI 5 CH 62 32dBm DCS Pwr LvI 0 CH 699 29dBm Figure 5 7 Transmitter RF Levels ...

Page 67: ... Control Signal Test Points 1 Figure 5 8 Control Signal Test Points 1 5 TEST POINT DATA 66 VC1 RX IQ RX IQ LDO output SEN SCLK SDATA PLL_PD 13MHz 2 7V VC2 TXPA AGCEN TXEN RX ON1 RX ON2 ...

Page 68: ...5 TEST POINT DATA 67 Control Signal Test Points 2 Figure 5 9 Control Signal Test Points 2 TXEN TXRAMP ...

Page 69: ...Figure 5 10 Regulator Output RF2V8 Figure 5 11 VCTCXO Power Supply 2V7_VCTCXO 5 TEST POINT DATA 68 ...

Page 70: ...5 TEST POINT DATA 69 Figure 5 12 13MHz Clock Figure 5 13 Control Signal of FEM in RX mode GSM DCS both ...

Page 71: ...Figure 5 14 Control Signal of FEM in GSM TX mode Figure 5 15 Control Signal of FEM in DCS TX mode 5 TEST POINT DATA 70 ...

Page 72: ...5 TEST POINT DATA 71 Figure 5 16 CLK DATA SEN Figure 5 17 CLK DATA AGCEN ...

Page 73: ...Figure 5 18 RXON1 RXON2 Figure 5 19 TXEN TARAMP TXPA 5 TEST POINT DATA 72 ...

Page 74: ...5 TEST POINT DATA 73 Figure 5 20 TX IQ Signal Figure 5 21 RX IQ Signal ...

Page 75: ...alues B Tx 1 Selecting Channel Select one of GSM or DCS Band and input appropriate channel 2 Selecting APC a Select either Power level or Scaling Factor b Power level Input appropriate value GSM between 5 19 or DCS between 0 15 c Scaling Factor A Ramp Factor appears on the screen You may adjust the shape of the Ramp or directly input the values C Rx 1 Selecting Channel Select one of GSM or DCS Ban...

Page 76: ...ndows98 ME AutoCal exe GSM phone Agilent 8960 or other equipment 7 3 Menu and settings Edit Ramp Show reference power ramp window Reference ramp is used in APC procedure You can open or save reference ramp data and edit it on notepad Picture 3 Reference ramp window Edit Make bin write Make binary file from measured calibration data and write to the phone The name of binaryfile is cal bin by defaul...

Page 77: ...tting dialog you can change port number baud rate etc Connection Connect to Ag8960 Connect to Agilent 8960 Connection Disconnect Ag8960 Disconnect Agilent 8960 Option Settings Gpib state Show current primary Gpib state Option Settings MPL Set max Tx power level used in APC procedure Option Settings CL Set cable loss value Option Settings Bin file Set default binary file name Picture 1 Buttons and ...

Page 78: ...Table 7 7 Setting Select automatic calibration item If you uncheck one item calibration will stop from the unchecked item This is useful when you want to process only one item 7 8 How to do calibration A Connect cable between phone and serial port of PC B Connect Ag8960 equipment and phone C Set correct port and baud rate D Press Connect to phone button so that the state change to SETUP E Set band...

Page 79: ...ush the battery locker to remove the battery pack 2 Loosen the 4 screws as shown below Figure 8 1 Removing Battery pack and screws 3 Carefully lift up the bottom of Rare Cover first then hold the covers and twist them Figure 8 2 Disassembly of Rear Cover and Front Cover ...

Page 80: ... Note When reassembling the covers assemble the Antenna hook first then the rest as shown in Fig 8 3 4 Turn the Antenna anti clockwise to remove from the cover 5 Use a sharp awl to push away the antenna bushing Figure 8 4 Removing Antenna and Antenna bushing 1 2 3 ...

Page 81: ...8 ASSEMBLY INSTRUCTION 80 6 Use a tweezers to remove the Battery Locker Figure 8 5 Removing Battery Locker 1 1 2 3 ...

Page 82: ...Front Cover Components 1 Lift up the Main PCB carefully and melt the solder connecting the Main PCB and the Flexible PCB Figure 8 6 Removing solder on Main PCB 2 Then remove the locker as shown below Figure 8 7 Removing locker on Main PCB Main PCB ...

Page 83: ... removing the Indicator use a small driver to push it down Figure 8 8 Removing Buttons and Indicator 5 Use a small type driver to push away a pin from the hinge 6 Hold the front cover and pull out the left hinge of folder first and then the right one Figure 8 9 Removing Folder ...

Page 84: ... 3 Disassembly of Folder 1 Remove a hinge from the folder 2 Then detach screw caps and screws Figure 8 10 Removing Hinge and screws 3 Disassemble the rest of components as shown below Fiigure 8 11 Disassembly of Folder component ...

Page 85: ...8 ASSEMBLY INSTRUCTION 84 4 Firstly melt the solder connecting the FPCB and LCD Then remove the PAD and locker in the following sequence Figure 8 11 Detaching LCD from FPCB ...

Page 86: ...RAM 9 1 Main Board The LG 512W is made up of two PCBs In lower part of the folder there is a main board And in the upper part of the folder there is a FPCB Below you can see the block diagram of both PCBs Figure 9 1 Main Blockdiagram ...

Page 87: ...9 2 FPCB Figure 9 2 FPCB Blockdiagram 9 BLOCK DIAGRAM 86 ...

Page 88: ...9 BLOCK DIAGRAM 87 9 3 RF Figure 9 3 RF Blockdiagram ...

Page 89: ...9 BLOCK DIAGRAM 88 ...

Page 90: ...12 1 Download Setup Type1 Using Data Kit Download procedure Access flash loader program in PC Select source code you want to download Don t check OWCD in flash loader window If you check OWCD it will be erase cal data Push start button in flash loader window and connect datakit to the phone Condition Remove battery in the phone ...

Page 91: ...12 DOWNLOAD AND CALIBRATION 94 Figure 12 2 Download Setup Type2 Using JIG ...

Page 92: ...2 3 Equipment Setup Equipment for Calibration Type Model Brand Wireless Communication Test Set HP 8960 Agilent RS 232 Cable and Test JIG LG RF Cable LG Power Supply HP 66311B Agilent GPIB interface card HP GPIB Agilent Calibration and Final test software LG Test SIM Card PC for Software Installation Pentium II class above 300MHz ...

Page 93: ...Jig DIP Switch Description Power Supply usually 4 0V DC Adaptor 9 5V 500mA Switch Number Name Description Switch 1 RPWRON In ON state phone is awaked Switch 2 HF_DETECT Turn on for AUDIO TEST Switch 3 Power Supply Power is provided for phone from Power Supply Switch 4 D C power Power is provided for phone from DC adaptor ...

Page 94: ... is used 1st ON state D Procedure 1 Connect as Fig 10 4 RS232 Serial cable is connected between COM port of PC and MON port of TEST JIG in general 2 POWER ON PC then enter into Windows 98 Remark Windows 2000 system could be feasible 3 Run AUTOCAL exe then AUTOCAL application window will be appeared LED Number Name Description LED 1 POWER Power is provided for Test Jig LED 2 TA Indicate charging st...

Page 95: ...n 1 1 3 Red light turns on Red Off 1 1 4 Red light turns off B Backlight 1 2 This menu is to test the LCD Backlight and Keypad Backlight Backlight On 1 2 1 LCD Backlight and Keypad Backlight light on at the same time Backlight Off 1 2 2 LCD Backlight and Keypad Backlight light off at the same time Backlight value 1 2 3 This controls brightness of Backlight When entering into the menu the present b...

Page 96: ... TEMP_LOW_LIMIT G Audio 1 7 This is a menu for setting the control register of Voiceband Baseband Codec chip Although the actual value can be written over it returns to default value after switching off and on the phone VbControl1 1 7 1 VbControl1 bit Register Value Setting VbControl2 1 7 2 VbControl2 bit Register Value Setting VbControl3 1 7 3 VbControl3 bit Register Value Setting VbControl4 1 7 ...

Page 97: ... for about 1 second then off And red LED is on for about 1 second then off C Backlight 3 3 LCD Backlight and LED Backlight are on for about 1 5 seconds at the same time then off D Buzzer 3 4 This menu is to test the volume of Buzzer It rings in the following sequence Volume1 Volmue2 Volume3 Volume0 mute Volume4 Volume5 E Vibrator 3 5 Vibrator is on for about 1 5 seconds F LCD 3 6 LCD screen resolu...

Page 98: ...ime to this 00 00 00 13 6 Fact Reset MENU 6 This Factory Reset menu is to format data block in the flash memory and this procedure set up the default value in data block 13 7 S W version MENU 7 This displays software version stored in the phone Attention Fact Reset i e Factory Reset should be only used during the Manufacturing process Servicemen should NOT progress this menu otherwise some of valu...

Page 99: ...14 REPLACEMENT PARTS LIST 102 14 EXPLODED VIEW 6 4 5 2 1 3 11 12 13 14 16 19 30 34 20 22 23 24 26 27 21 17 18 25 28 29 15 7 8 9 10 ...

Page 100: ......

Page 101: ... CHIP D361A P TO P 5 SBCL00 BATTERY CELL LITHIUM SBCL0000901 1 2 00 V 4 0 mAh COIN BACKUP BATTERY 5 SJMY00 VIBRATOR MOTOR SJMY0002801 1 3 0 V 80 mA 12 15 height 2 7 0 1T 5 SP501 RECEIVER SURY0004501 1 5 SVLY00 LCD SVLY0010502 1 128 128 30 4 34 1 BLUE EL LCD DRIVER S 4591A FSTN 4 GRAY COF 3 ACGM00 COVER ASSY REAR ACGM0003503 1 LG 510 511 512 common use METALIC SILVER 4 ACFY00 CONTACT ASSY ANTENNA A...

Page 102: ...6 CAP CERAMIC CHIP ECCH0000140 1 560 pF 50V K X7R HD 1005 R TP 5 C389 CAP CERAMIC CHIP ECCH0000178 1 1 8 pF 50V D NP0 TC 1005 R TP 5 C39 CAP CERAMIC CHIP ECCH0003401 1 10 uF 6 3V Z Y5V HD 2012 R TP 5 C390 CAP CERAMIC CHIP ECCH0000115 1 22 pF 50V J NP0 TC 1005 R TP 5 C393 CAP CERAMIC CHIP ECCH0000117 1 27 pF 50V J NP0 TC 1005 R TP 5 C394 CAP CERAMIC CHIP ECCH0000117 1 27 pF 50V J NP0 TC 1005 R TP 5...

Page 103: ...TP 5 R101 RES CHIP ERHY0000286 1 200K ohm 1 16W J 1005 R TP 5 R12 RES CHIP ERHY0001103 1 0 33 ohm 1 4W F 2012 R TP 5 R13 RES CHIP ERHY0000213 1 47 ohm 1 16W J 1005 R TP 5 R14 RES CHIP ERHY0000216 1 68 ohm 1 16W J 1005 R TP 5 R19 RES CHIP ERHY0000244 1 1 5K ohm 1 16W J 1005 R TP 5 R2 RES CHIP ERHY0000512 1 10M ohm 1 16W J 1608 R TP 5 R20 RES CHIP ERHY0000280 1 100K ohm 1 16W J 1005 R TP 5 R21 RES C...

Page 104: ...0702 1 12 V 50 mA HORIZONTAL G LIGHT TOUCH SWITCH 4 PIN 5 S4 SWITCH TACT ESCY0000702 1 12 V 50 mA HORIZONTAL G LIGHT TOUCH SWITCH 4 PIN 5 SPFY00 PCB MAIN SPFY0022509 1 FR 4 9 mm MULTI 8 VER 1 4 PCB_VER_1 8 5 SW301 CONN RF SWITCH ENWY0000101 1 ANGLE SMD 0 5 dB 5 U1 IC EUSY0100401 1 TSSOP 28 PIN R TP GSM POWER MANAGEMENT SYSTEM 5 U2 IC EUSY0100701 1 64 BALL LFBGA MINI BGA 64 PIN R TP DUAL MODE VOICE...

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