LG LG-A270 Service Manual Download Page 48

Page: 48 / 119

4. TROUBLE SHOOTING

- 48 -

Only for training and service purposes

LGE Internal Use Only

(1) Checking Crystal Circuit

TP1

G16

G17

B13

A13

E17

F16

D17

E16

N15

BPI_BUS2
BPI_BUS3

TEST1
TEST2
TEST3
TEST4

TXO_HB
TXO_LB

XTAL1
XTAL2

XIN

X100

26MHz

TSX-3225

GND2

HOT2

HOT1

GND1

RF_TX_EN

RF_LB_TX

RF_HB_TX

RF_VLOGIC

Figure 4.2.2

LGE Internal Use Only

4. TROUBLE SHOOTING

(1) Checking Crystal Circuit

TP1 (26 MHz)

OK?

Crystal is OK.

See next page to check PLL Circuit

Yes

Replace X100

Figure 4.3.2

Figure 4.3.3

TP1

Figure 4.3.1

TP1 (X100 1pin)

TP1

TP1 (X100 1pin)

Yes

TP1 (6 MHz)OK?

Replace X100

Crystal is OK.

See next page to check PLL Circuit

Summary of Contents for LG-A270

Page 1: ...Internal Use Only Service Manual LG A270 Date April 2012 Issue 1 0 ...

Page 2: ...rface 38 3 13Vibrator Interface 39 3 14Torch LED Interface 40 3 15 Micro SD Card Interface 41 4 TROUBLE SHOOTING 42 4 1 RF Component 42 4 2 RXTrouble 43 4 3TXTrouble 47 4 4 FM RadioTrouble Wired 3 5 phi wireless 51 4 5 Power OnTrouble 53 4 6 ChargingTrouble 56 4 7VibratorTrouble 58 4 8 LCDTrouble 60 4 9 SpeakerTrouble 62 4 10 EarphoneTrouble 65 4 11 MicrophoneTrouble 68 4 12 SIM Card InterfaceTrou...

Page 3: ...telecommunication service of facilities accessed through or connected to it The manufacturer 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 r...

Page 4: ...k slightly different G Interference and Attenuation Phone may interfere with sensitive laboratory equipment 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 bythe sign Following information is ESD handling r Service personnel should gro...

Page 5: ...Drop Output LDO Liquid Crystal Display LCD Intermediate Frequency IF International Portable User Identity IPUI Global System for Mobile Communications GSM General Purpose Interface Bus GPIB Gaussian Minimum Shift Keying GMSK Flexible Printed Circuit Board FPCB Electrostatic Discharge ESD Electrical Erasable Programmable Read Only Memory EEPROM Digital Signal Processing DSP dB relative to 1 milli w...

Page 6: ...olled Oscillator VCO Universal Asynchronous Receiver Transmitter UART Time Division Multiple Access TDMA Time Division Duplex TDD Travel Adapter TA Side Tone Masking Rating STMR Pseudo SRAM PSRAM Static Random Access Memory SRAM Sending Loudness Rating SLR Subscriber Identity Module SIM Surface Acoustic Wave SAW RealTime Clock RTC Root Mean Square RMS Receiving Loudness Rating RLR Radio Frequency ...

Page 7: ...eriod 9 RSSI 85dBm Talk time Up to 8 hrs GSM Tx Level 10 Charging time Approx 3 5 hours RX Sensitivity GSM EGSM 108dBm DCS 108dBm TX output power GSM EGSM 32 5dBm Level 5 DCS PCS 29 5dBm Level 0 SIM card type 3VSmall Display MAIN 1 45 TFT 128 128 pixel 65K Color Status Indicator Hard icons Key Pad 0 9 Up Down Left Right Navigation Key Send Key PWR Key Soft Key Left Right ANT Internal EAR Phone Jac...

Page 8: ...rvice purposes LGE Internal Use Only Copyright 2012 LG Electronics Inc All right reserved O nly for training and service purposes LGE Internal Use Only 5 2 SYSTEM SPECIFICATION Travel Adapter Yes Speaker Receiver 18x12Φ Speaker Receiver MIDI 32 poly Item Feature Comment Camera NotSupport FM Radio Yes ...

Page 9: ...2 Phase Error RMS 5 degrees Peak 20 degrees 3 Frequency Error 0 1 ppm 4 PowerLevel Level Power Toler Level Power Toler 6 31dBm 3dB 14 15dBm 3dB 7 29dBm 3dB 15 13dBm 3dB 8 27dBm 3dB 16 11dBm 5dB 9 25dBm 3dB 17 9dBm 5dB 10 23dBm 3dB 18 7dBm 5dB 11 21dBm 3dB 19 5dBm 5dB 12 19dBm 3dB GSM850 EGSM 5 33dBm 2dB 13 17dBm 3dB Level Power Toler Level Power Toler 1 28dBm 3dB 9 12dBm 4dB 2 26dBm 3dB 10 10dBm 4...

Page 10: ...ctrum due to modulation Offsetfrom 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 63 3 000 6 000 65 6 000 71 GSM850 EGSM Offsetfrom 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 DCS PCS 6 Output RF Spectrum due to switching transient GSM850 EGSM Offsetfrom Carrier kHz Max dBm 400 19 600 ...

Page 11: ...ICATION Item Description Specification 6 Output RF Spectrum due to switching transient Offsetfrom Carrier kHz Max dBm 400 22 600 24 1 200 24 1 800 27 7 Spurious Emissions Conduction Emission Status 8 BitError Ratio GSM850 EGSM BER Class II 2 439 102 dBm DCS PCS BER Class II 2 439 100 dBm 9 RX Level Report Accuracy 3 dB 10 SLR 11 3 dB 11 Sending Response 300 12 1 000 6 2 000 6 3 000 6 Frequency Hz ...

Page 12: ...ion 13 Receiving Response 300 7 500 5 1 000 5 3 000 5 100 200 4 000 3 400 10 2 0 2 12 0 2 2 14 STMR Over17 dB Mean that Adopt a straight line in between 300 Hz and 1 000 Hz to be Max level in the range 15 Stability Margin 6 dB 16 System frequency 13 MHz tolerance 2 5 ppm 17 32 768KHz tolerance 20 ppm 18 Ringer Volume Atleast 65 dBspl under below conditions 1 Ringer set as ringer 2 Test distance se...

Page 13: ... Number Power 3 2 101 2 93 2 20 Antenna Display 2 1 1 0 Battery Bar Number Voltage 3 3 2 3 71 0 05 V 21 Battery Indicator 22 Low Voltage Warning Blinking Bar 1 time per 1 minute Receiver 1 time per 3 minutes Speaker 23 Forced shut down Voltage 3 3 3 0 05V 24 Battery Type Lithium Ion Battery Standard Voltage 3 7 V Battery full charge voltage 4 2 V Capacity 950mAh 25 Travel Charger Switching mode ch...

Page 14: ...l Brief 14 Copyright 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 3 TECHNICAL BRIEF 3 1 Digital Main Processor Figure 3 1 1 MT6251 Hardware Block Diagram ...

Page 15: ...I r 4VQQPSUT PQFSBUJOH GSFRVFODZ VQ UP User interfaces r row x 5 column keypad controller with a hardware scanner r 4 64 DPOUSPMMFS XJUI IBSEXBSF 5 5 QSPUPDPM DPOUSPM r 3FBM time clock RTC operating with a separate power supply r FOFSBM purpose I Os GPIOs r TFU PG 1VMTF 8JEUI PEVMBUJPO 18 PVUQVU r BYJNVN FYUFSOBM JOUFSSVQU MJOFT Connectivity r TFUT PG 6 35 XJUI IBSEXBSF GMPX DPOUSPM BOE TQFFE VQ U...

Page 16: ...r 4VQQPSUT UIF 4 JOUFSGBDF r JHI resolution D A converters for stereo audio playback r 4UFSFP UP NPOP DPOWFSTJPO 3 1 4 GSM RF features Receiver r 0OF IJHI CBOE BOE POF MPX CBOE T UP TVQQPSU USVF RVBE CBOE SFDFJWFS r 2VBESBUVSF RF mixers r E 1 HBJO XJUI E HBJO TUFQ Transmitter r JSFDU SFRVFODZ PEVMBUJPO BSDIJUFDUVSF XJUI 1 QSF amplifier r PX 39 CBO OPJTF Digitally controlled crystal oscillator DCXO...

Page 17: ...U The PMU is designed to deliver the power for a typical standard phone Figure 3 2 1 Block Figure of the PMU Modules MT6251 DC DC Step Down Converter with LDO Mode for 1 2V VCORE The DC DC converter generates a 1 2 V supply rail This voltage rail is used to supply main parts of the system Among buck converters VCORE also provide LDO mode for lower cost requirement Buck Mode LDO Mode VCORE LDO VCOR...

Page 18: ...could source 150mA max with 2 8V output voltage It supplies the analog sections of the SoC The LDO is optimized for low frequency ripple rejection in order to reject the ripple coming from the burst at 217Hz of RF power amplifier TCXO LDO VTCXO The TCXO LDO is a linear regulator that could source 40mA max with 2 8V output voltage It supplies the temperature compensated crystal oscillator which nee...

Page 19: ... VFM The VFM LDO is a linear regulator that could source 40mA max with 2 8V output for internal FM chip VIBR LDO VIBR The VIBR LDO is a linear regulator that could source 200mA max with 1 3V 1 5V 1 8V 2 5V 2 8V 3 0V or 3 3V output for Vibrator Type LDO name Vout V Imax mA Description ALDO VRF 2 8 200 RF chip ALDO VA 2 8 150 Analog baseband ALDO VTCXO 2 8 40 13 26 MHz reference clock ALDO VFM 2 8 4...

Page 20: ...EY should be kept low until the PMU receives the PWRBB from the baseband RTC module generates PWRBB to wake up the system If the RTC module is scheduled to wake up the handset at some time the PWRBB signal will directly be sent to the PMU In this case PWRBB will become high at a specific moment and allow PMU to be powered on just like the sequence described above The function is called RTC alarm V...

Page 21: ...ery voltage falls below 2 5V In this state the VRTC LDO will be shutdown Reset The PMU contains a reset control circuit which will take effects at both power up and power down The RESETB pin is held low in the beginning of the power up and returns high after the pre determined delay time At power off the RESETB pin will return low immediately without any delay 3 TECHNICAL BRIEF Figure 3 2 3 Power ...

Page 22: ...tching circuitry for 50 ohm input and output impedances Tx harmonics filtering high linearity low insertion loss RF switch and a Power Amplifier Control PAC block with internal current sense resistor The two Heterojunction Bipolar Transistor HBT PA blocks a BiFET PAC and switch control circuit are fabricated onto a single Gallium Arsenide GaAs die One PA block supports the GSM850 900 bands and the...

Page 23: ...L351 C399 4 7u 4 7u C398 5 6n L306 SW300 G2 ANT RF G1 RF_TX_RAMP RF_TX_EN RF_LB_TX RF_HB_RXN RF_HB_RXP GND RF_HB_TX RF_2G_BS RF_LB_RXN RF_VLOGIC RF_LB_RXP 4 7uF 10V M X5R HD 1608 R TP Mode Input Control Bits VSW_EN TxEN BS STANDBY 0 0 0 Rx11 1 0 0 Rx22 1 0 1 Tx_LB 1 1 0 Tx_HB 1 1 1 Rx1 and Rx2 are broadband receive ports and each supports the GSM850 GSM900 DCS and PCS bands Band selection and cont...

Page 24: ...IF other time base is the 32 768 KHz clock generated by an on chip oscillator connected to an external crystal Figure 3 4 1 shows the clock sources as well as their utilizations inside the chip 624mhz 624mhz UPLL_624M_CK UPLL_48M_USB_CK MPLL_CK CLKSQ_26M_CK FUSB_48M_CK FUSB_78M_CK FGSM_52M_CK TEST_CK TEST_CK TEST_CK HDSP_104M_CK HSF_78M_CK HBUS_78M_CK TEST_CK TEST_CK HMCU_78M_CK HMCU_78M_CK HBUS_7...

Page 25: ...IEF 3 5 RFSYS of MT6251 U100 3 5 1 GENERAL DESCRIPTION RFSYS built in MT6251 SOC is a highly integrated RF transceiver for multi band GMS and GPRS cellular systems The features are listed as following Receiver One high band and one Low band LNAs to support true quad band receiver 2VBESBUVSF 3 NJYFST Fully integrated channel filter with f3dB 700kHz 96 dB dynamic range ADC 24dB PGA gain with 6dB gai...

Page 26: ...E Internal Use Only 23 3 TECHNICAL BRIEF Transmitter Direct frequency modulation DFM architecture with PA pre amplifier Low RX band noise Frequency Synthesizer Programmable fractional N synthesizer Integrated wide range RFVCO Integrated loop filter Digitally Controlled Crystal Oscillator DCXO Two pin 26 MHz crystal oscillator On chip programmable capacitor array for coarse tune On chip programmabl...

Page 27: ...lexibility inapplications that require data and parameter storage Figure 3 6 1 MEMORY BLOCK DIAGRAM 3 TECHNICAL BRIEF 3 6 MEMORY FM25Q32 U101 Figure 3 6 1 MEMORY BLOCK DIAGRAM The FM25Q32 Serial Flash memory provides a storage solution for systems with limited space pins and power The 25Q series offers flexibility and performance well beyond ordinary Serial Flash devices They are ideal for code sh...

Page 28: ...PI using pins Serial Clock Chip Select Serial Data I O0 DI Serial Data I O1 DO SPI clock frequencies of up to 104MHz are supported allowing equivalent clock rates of GPS VBM 0VUQVU BOE I GPS 2VBE 0VUQVU XIFO VTJOH UIF BTU 3FBE VBM 2VBE 0VUQVU instructions These transfer rates are comparable to those of 8 and 16 bit Parallel Flash memories A Hold pin Write protect pin and programmable write protect...

Page 29: ...K_1 SIM_RST_1 SIM_CONNECTOR_1 The Main Base Band Processor MT6251 provides SIM Interface Module The MT6251 checks status Periodically During established call mode whether SIM card is inserted or not but it doesn t check during deep sleep mode In order to communicate with SIM card 3 signals SIM_DATA_1 SIM_CLK_1 SIM_RST_1 And This model supports 1 8 3V SIM Card Figure 3 7 1 SIM CARD Interface Signal...

Page 30: ... features are Up to 176 x 220 resolution The internal frame buffer supports 8bpp indexed color and RGB 565 Supports 8 bpp RGB332 12 bpp RGB444 16 bpp RGB565 18 bpp RGB666 and 24 bpp RGB888 For serial LCD modules this interface performs parallel to serial conversion and supports 8 9 16 18 24 and 32 bit interfaces The serial interface may use 4 pins LSCE LSDA LSCK and LSA0 or 3pins LSCE LSDA and LSC...

Page 31: ...k No external component required Current balance between channels Individual channel current enable control HW dimming control by 3 8 2 LCDBacklight Interface Figure 3 8 2 RT8966 BlockDiagram 3 8 2 LCD Backlight Interface J2 J3 K2 K3 ISINK0 ISINK1 ISINK2 ISINK3 M_KEY_LED1 LCD_BL_1 M_KEY_LED2 CN400 14 12 11 10 9 8 7 6 5 4 3 2 1 13 C403 27p C402 27p VBAT 100ohms R496 C401 27p C404 27p R499 100ohms R...

Page 32: ...can be programmed with an external resister For the USB application user can set the current to 100mA 500mA through EN SET pin For the factory mode the RT9524 can allow 4 2V 2 3A power pass through to support system operation It also provides a 50mA LDO to support the power of peripheral circuit The internal thermal feedback circuit regulates the die temperature to optimize the charge rate for all...

Page 33: ...B205 KB206 KB207 KB208 KB209 KB210 KB211 KB212 KB213 KB214 KB215 VA204 DNI R257 330 330 R258 330 R259 R260 330 330 R261 R262 330 330 R263 R264 330 330 R265 R266 330 KB216 KB217 KB218 KB219 KB200 END_KEY KEY_IN3 KEY_OUT2 KEY_OUT1 KEY_OUT3 KEY_OUT4 KEY_IN1 KEY_IN0 KEY_IN2 KEY_IN4 DOWN MENU 5 8 SEND END RIGHT 3 6 LEFT SEL 0 7 4 9 KEY MATRIX 1 UP 2 3 10 Keypad Interface Figure 3 10 1 MAIN KEY STRUCTUR...

Page 34: ...en the key is pressed or released something different in the 6x5 matrix or power key the key detection block will sense the change and check if a key has been pressed or released Whenever 5IF TUBUVT PG LFZ DIBOHFT PS JU JT TUBCMF B 1 32 XJMM CF JTTVFE 5IF 6 XJMM UIFO SFBE UIF LFZ T QSFTTFE directly in KP_MEM1 KP_MEM2 KP_MEM3 and KP_MEM4 registers To ensure no key pressed information is lost the st...

Page 35: ...o front end consists of voice and audio data paths Figure 3 11 1 shows the block diagram of the Audio front end All voice band data paths comply with the GSM 03 50 specification Mono hands free audio or external FM radio playback paths are also provided The audio stereo path facilitates CD quality playback external FM radio and voice playback through a headset Figure 3 11 1 Audio Front End ...

Page 36: ...2 Shows block diagram of digital circuits in an audio front end The APB register block is an APB peripheral storing from the MCU The DSP audio port DAP Block interfaces with DSP for control and data communication The digital filter block performs filter operation for voice band and audio band signal processing The Digital Audio interface DAI block communicates with the system simulator for FTA or ...

Page 37: ...h previous products C1 and Rin form an AC coupling and high pass network C1 Rin is selected so that the in band signal will not be attenuated too much For differential minimum 13k resistance the minimum value of C1 is 170uF forless than 1dB attenuation at 300hz R2 is determined by the sensitivity of microphone C2 and R2 form another low pass filter filtering noise coming from the microphone bias p...

Page 38: ...ses LGE Internal Use Only 3 12 KEY BACLKLIGHT LED Interface Key Backlight LED 1 2 is controlled by Current source LED driver port of MT6251 like as LCD Backlight Figure 3 12 1 Key Backlight Block VA215 DNI VBAT 330 R232 LD203 LD202 LD201 DNI VA214 LD200 R233 330 1u C230 R234 330 330 R231 M_KEY_LED1 M_KEY_LED2 ...

Page 39: ... 1 5 1 8 2 5 2 8 3 0 3 3 V SW set up the register to control PMIC VIBR LDO circuit configuration Figure 3 13 1 Vibrator Driver BlockDiagram 3 13 Vibrator Interface Vibrator is controlled by LDO Max Current of LDO is 200mADLDO OF MT6251 can Control LDO Voltage to 1 3 1 5 1 8 2 5 2 8 3 0 3 3 VSW set up the register to control PMIC VIBR LDO circuit configuration Figure 3 13 1 Vibrator Driver Block Di...

Page 40: ...Current is controlled by SW and Max Current is 150mA Figure 3 14 1Torch LED Block P16 K12 M13 P17 R17 L11 M4 R16 P15 N13 T16 J12 R8 R7 P7 P6 N6 GPIO27 GPIO28 GPIO29 GPIO30 GPIO31 KCOL0 KCOL1 KCOL2 KCOL3 KCOL4 KP_LED KROW0 KROW1 KROW2 KROW3 KROW4 KROW5 TF_DATA0 TF_CMD TF_CLK LSA0 KEY_IN3 KEY_OUT2 KEY_OUT1 LCD_MAKER_ID JTAG_RTCK TORCH_LED KEY_OUT3 KEY_OUT4 KEY_IN1 KEY_IN0 KEY_IN2 KEY_IN4 VA404 LD410...

Page 41: ...00 ENSY0023802 GND DAT2 CD_DAT3 CMD VDD CLK VSS CARD_DETECT DAT0 COVER_DETECT1 DAT1 47K R414 2 47K R410 2 C409 1u VIO28 R544 DNI R413 470K R412 100K GND TF_DATA0 TF_CMD TF_CLK TF_CHECK 3 15 Micro SD Card Interface needed on the DAT3 signalUpon insertion of the memory card the DAT3 signal will be transited from low to high If the memory card is removed the DAT3 signal will return to logic low ...

Page 42: ... 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 TROUBLE SHOOTING 4 1 RF Component U100 U100Main Chip MT6251 U101 Memory U300 PAM SKY77550 X100 26MHz Clock U100 U101 X100 U300 ...

Page 43: ...raining and service purposes LGE Internal Use Only 4 2 RXTrouble START 1 Check Crystal Circuit Re download or Do calibration again 2 CheckMobile SW PAM RX 3 Check PLL Control HP8960 Test mode62 CH 7 level setting TCH 62CH 60dBm setting BCCH Spectrum analyzer settingOscilloscope setting ...

Page 44: ...ESHOOTING 1 Checking Crystal Circuit TP1 26 MHz OK No Crystal is OK See next page to check PLL Circuit Yes Replace X100 Figure 4 2 2 Figure 4 2 3 TP1 Figure 4 2 1 TP1 X100 1pin TP1 TP1 P1 G16 G17 B13 A13 E17 F16 D17 E16 N15 BPI_BUS2 BPI_BUS3 TEST1 TEST2 TEST3 TEST4 TXO_HB TXO_LB XTAL1 XTAL2 XIN X100 26MHz TSX 3225 2 1 3 4 GND2 HOT2 HOT1 GND1 RF_TX_EN RF_LB_TX RF_HB_TX RF_VLOGIC Figure 4 2 2 TP1 X1...

Page 45: ...N BS RSVD1 RSVD2 GND1 GND2 VBATT1 VBATT2 GND3 GND4 GND5 GND6 GND7 Rx2 RSVD3 Rx1 RSVD TxEN VRAMP GND8 GND9 GND10 ANT GND11 GND12 GND13 PGND VBAT 22p C350 220p C304 1 2 L310 1n 12n L381 L350 3 6n 24K R391 33p C311 DNI C312 DNI C301 C302 33p L390 10n 12n L380 2 2p C306 2 2p C300 C310 1 5p 1 5p C317 L308 3 3n L311 3 3n L312 5 6n L391 10n 3 6n L351 5 6n L306 RF_TX_RAMP RF_TX_EN RF_LB_TX RF_HB_RXN RF_HB...

Page 46: ...bile SW SW101 No Yes Mobile SW PAM is OK Control Signal isTP4 TP7 VLogic BS OK Check Main Chip U100 No Yes TP2 High Band TP3 Low Band Signal is OK Replace U300 No Yes Check U300 Yes Mode Input Control Bits VSW_EN TxEN BS STANDBY 0 0 0 Rx11 1 0 0 Rx22 1 0 1 Tx_LB 1 1 0 Tx_HB 1 1 1 Rx1 and Rx2 are broadband receive ports and each supports the GSM850 GSM900 DCS and PCS bands EGSM Rx ...

Page 47: ...ining and service purposes LGE Internal Use Only 4 3 TXTrouble START 1 Check Crystal Circuit Re download or Do calibration again 2 Check Mobile SW PAMTX 3 Check PLL Control againHP8960 Test mode62CH 7 level setting TCH 62CH 60dBm setting BCCH Spectrum analyzer settingOscilloscope setting ...

Page 48: ... XTAL2 XIN X100 26MHz TSX 3225 2 1 3 4 GND2 HOT2 HOT1 GND1 RF_TX_EN RF_LB_TX RF_HB_TX RF_VLOGIC Figure 4 2 2 Copyright 2012 LG Electronics Inc All right reserved LGE Internal Use Only 4 TROUBLESHOOTING 1 Checking Crystal Circuit TP1 26 MHz OK No Crystal is OK See next page to check PLL Circuit Yes Replace X100 Figure 4 3 2 Figure 4 3 3 TP1 Figure 4 3 1 TP1 X100 1pin TP1 TP1 X100 1pin Yes TP1 26 MH...

Page 49: ...N BS RSVD1 RSVD2 GND1 GND2 VBATT1 VBATT2 GND3 GND4 GND5 GND6 GND7 Rx2 RSVD3 Rx1 RSVD TxEN VRAMP GND8 GND9 GND10 ANT GND11 GND12 GND13 PGND VBAT 22p C350 220p C304 1 2 L310 1n 12n L381 L350 3 6n 24K R391 33p C311 DNI C312 DNI C301 C302 33p L390 10n 12n L380 2 2p C306 2 2p C300 C310 1 5p 1 5p C317 L308 3 3n L311 3 3n L312 5 6n L391 10n 3 6n L351 5 6n L306 RF_TX_RAMP RF_TX_EN RF_LB_TX RF_HB_RXN RF_HB...

Page 50: ...ace MT6251 U100 No Mobile SW PAM is OK TP8 Signal is OK Replace PAM U300 No Yes TP8 signal same asTP1 Replace SW300 No Yes Yes Control Signal isTP4 TP6 TP7 VLogic TXEN BS OK Yes Check MT6251 No Mode Input Control Bits VSW_EN TxEN BS STANDBY 0 0 0 Rx11 1 0 0 Rx22 1 0 1 Tx_LB 1 1 0 Tx_HB 1 1 1 Rx1 and Rx2 are broadband receive ports and each supports the GSM850 GSM900 DCS and PCS bands EGSM Rx ...

Page 51: ...c All right reserved Only for training and service purposes LGE Internal Use Only 4 4 FM RadioTrouble Wired 3 5 phi wireless Figure 4 2 2 TP1 TP2 TP4 TP3 TP5 R455 2 3 M6 L404 0 1uH C422 12p D400 100n L401 C406 47p FM_ANT GND FM_ANT_GND TP1 TP2 TP3 TP4 TP5 ...

Page 52: ... good Replace J400 No Yes A condition is good FM_radio willwork properly properlyCheck condition of matching components TP1 2 3 4 5 Check BiasVoltage Give the additory solder in TP1 2 3 4 5 No START Check of earless_jackcondition A condition is good Replace Rear Cover No Check condition of intenna Check BiasVoltage A condition is good Replace U100 No Yes Yes Yes Yes Replace U100 No ...

Page 53: ...ved O nly for training and service purposes LGE Internal Use Only 50 4 TROUBLESHOOTING 4 5 Power On Trouble Figure 4 5 1 Figure 4 5 3 Figure 4 5 2 U100 TP1 VRTC TP3 VCORE TP6 VIO28 TP4 VIO18 TP5 VSF TP7 VA TP8 VUSB TP9 VRF TP10 VTCXO END TP2 END_KEY TP2 VA204 DNI R257 330 KB200 END_KEY END TP2 Figure 4 5 3 U100 TP3 VCORE TP8 VUSB TP1 VRTC TP6 VIO28 TP10 VTCXO TP5 VSF TP9 VRF TP4 VIO18 TP7 VA Figur...

Page 54: ...43_VCORE AVDD43_VD1 AVDD43_VD2 AVSS12_AUD AVSS12N_AUD_DAC AVSS12N_AUD_LDO AVSS28_ABB AVSS33_USB AVSS43_DRV AVSS43_LDOS AVSS43_VCORE AVSS43_VRF VA VCCK12_CORE1 VCCK12_CORE2 VCORE VCORE_FB VDD18SF_IO VDD28_IO VDD28_IO_BPI VDD28_RTC VDRV VFM VIBR VIO18 VIO28 VREF VRF VRF_S VRTC VSF VSIM VSIM2 VSS_DIG1 VSS_DIG2 VTCXO VUSB DVDD28_IO DVDD43_SPK1 DVSS43_SPK2 VCORE C111 1u 1UF C116 VIO18 VIO28 VUSB 1UF C1...

Page 55: ...geinto high of POWERKEY Yes Check the voltage of The LDO outputs at U100 Check the contact of power keyOr dome switch No Re download software Yes Does it downloaded normally Is the phone power on The phone will Properly operating Replace U101 No Replace U100 Does it work properly Replace the main board No No Yes Yes Yes TP1 VRTC 2 3V TP3 VCORE 1 2V TP4 VIO18 1 8V TP5 VSF 3 0V TP6 VIO28 2 8V TP7 VA...

Page 56: ...rnal Use Only 4 6 ChargingTrouble R252 1K R253 3K 100K R254 VBAT U201 RT9524 EUSY0410801 6 5 7 4 8 3 9 2 10 1 11 PGND VIN BATT ISET PGB GND1 CHGSB LDO GND2 IEOC EN_SET C240 1u VBUS_USB VBUS_LDO_4V9 0 1u C239 C241 1u VIO28 R255 DNI CHG_EN CHG_EOC 25V 10V 10V 1 CHARGER IC TP2 TP1 Figure 4 6 2 U201 CN203 TP1 TP2 Figure 4 6 1 ...

Page 57: ...se Only START Battery can be charged No Charging is properly operating Yes Re solder the CN203 Pin 1 VCHARGE Is the voltageatTP2 4 9V Replace U201 No Is I O Connector CN203 well soldered No Check the voltage atTP1 5 6V TheTA is out of orderChange theTA No Yes Change the battery Battery is charged Yes Replace U100 No Yes Yes Yes ...

Page 58: ...012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 7 VibratorTrouble Figure 4 7 2 C232 1u R237 10 10 R238 L201 1 VB200 2 1 47n C231 VIB_P TP1 TP1 R237 R238 Vibrator PAD Figure 4 7 1 ...

Page 59: ... Only 56 START YES NO YES Vibrator Working well Replace the R237 R238 NO Doesthe vibrator vibrate well Replace the Vibrator or Cleanthe vibrator pad Isthe voltage at TP1 high SETTING Enter the engineering mode and set vibrator on at vibration of Device test menu 4 TROUBLESHOOTING START Is the voltage atTP1 high Replace the R237 R238 No VibratorWorking well Does the vibrator vibrate well Replace th...

Page 60: ...P1 TP2 TP 3 57 4 TROUBLESHOOTING 4 8 LCD Trouble CN400 TP1 Figure 4 8 2 TP2 R499 R497 R496 R498 R495 Figure 4 8 3 Figure 4 8 1 4 8 LCDTrouble Figure 4 8 3 CN400 14 12 11 10 9 8 7 6 5 4 3 2 1 13 C403 27p C402 27p VBAT 100ohms R496 C401 27p C404 27p R499 100ohms R498 100ohms R495 100ohms C405 27p VIO28 C400 1u 100ohms R497 R1 120K LSA0 LSCE0B_R LSDA_R LSCK LRSTB_R LCD_MAKER_ID LCD_BL_1 TP3 TP2 TP1 T...

Page 61: ...well Check the soldering Condition of CN400 Re solder LCD Module No Yes Yes Check the voltage atTP2 2 8V Yes Check the voltage at each pin ofTP3 changeslow to high Yes Does LCDWork Properly Yes Re solder C400 No Re solder resister connected faulty pin R495 499 No Replace LCD Module No Is the voltage ofTP1 is upper 2 5V Check the soldering Condition of CN400 Re download Re solder LCD ModuleReplace ...

Page 62: ...OUBLE SHOOTING 62 Copyright 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 9 SpeakerTrouble Figure 4 9 2 CN201 Speaker contact pad Figure 4 9 1 TP1 ...

Page 63: ...served Only for training and service purposes LGE Internal Use Only Figure 4 9 3 VA200 R250 R251 5 5 V SMD 480pF 1005 SEVY0003901 VA201 C207 ECCH0000151 4 7n C203 39pF VA227 EDTY0012501 Diode TVS SEMTECH VA228 4 7n C208 CN201 2 1 SPK_N SPK_P RCV_P RCV_N Contact Type TP1 ...

Page 64: ...for training and service purposes LGE Internal Use Only START Check the audio signalTP1 Re Download No Speaker working well Make a phone call Yes Check the audio signa lTP1 Re Download No Yes Yes Does SpeakerWork Properly Yes Clean CN201 or Change the Speaker No TP1 Play Sound Midi ...

Page 65: ...4 TROUBLE SHOOTING 65 Copyright 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 10 EarphoneTrouble Figure 4 10 1 TP1 J400 TP3 TP2 ...

Page 66: ...M6 L404 0 1uH C422 12p R421 100K C411 470p R422 100K D400 100K R423 VA R424 100K 470p C412 100n L401 VA401 C416 39pF C418 39pF R528 1K VA402 VA403 100ohms R418 100ohms R420 FB402 1800 FB403 1800 0 1uF C513 C512 0 1uF R540 10K C419 10u R542 1 5K VMIC_BIAS_P L402 0 1uH L403 0 1uH 1800 FB401 C406 47p C414 39pF FM_ANT HS_MIC_P HS_MIC_N HS_L GND HS_R HS_HOOK_DET FM_ANT_GND HS_JACK_DET TP1 TP2 TP3 ...

Page 67: ...signalLevel at TP2 Is a fewhundreds mV AC Change another Headset and Try again or Re solder J400 No Check the audio signal Change another Headset and Try again or Re solder J400 No Yes Set the speech of the test equipment to PRBS mode and connect call Yes Set the speech of the test equipment to echo modeand connect call Yes Check the voltage Levelof TP1 is Low Re download Change another Headset an...

Page 68: ...rophoneTrouble Figure 4 11 2 R244 1 SUMY0003815 B4010AL443 49 MIC200 2 1 VA203 VA202 10u C215 39pF C218 C219 0 033uF C221 39pF C216 39pF R217 2 2Kohms R213 1Kohms VMIC_BIAS_P 100ohms R219 R218 100ohms 2 2Kohms R220 C220 39pF 0 033uF C217 L202 27n 27n L203 MAIN_MIC_P MAIN_MIC_N 10 uF 6 3V M X5R TC 1608 R TP ECCH0005604 MIC TP1 TP2 MIC200 TP1 TP2 ...

Page 69: ...YES YES Checkthe voltage Levelat TP2 while talking Canhear your voice through the earpiece Make a phone call thencheck TP1 mic bias voltage NO Change the microphone YES NO Go to speaker trouble Re download orreplace U100 Checkmicrophone hole YES Microphone will work properly 4 TROUBLESHOOTING START Make a phone call then checkTP1 micbias voltage Re downloador replace U100 No Microphone will workpr...

Page 70: ...es LGE Internal Use Only 4 12 SIM Card InterfaceTrouble Figure 4 12 2 VA216 DNI DNI VA219 C223 1u DNI VA217 VA218 DNI R225 DNI VSIM1 R226 DNI VSIM1 DNI R227 VSIM1 DNI R222 J200 C11 C10 C12 C9 C7 C3 C6 C2 C5 C1 VCC GND1 RST VPP CLK IO GND2 GND5 GND3 GND4 SIM_DATA_1 SIM_CLK_1 SIM_RST_1 SIM_CONNECTOR_1 TP1 TP1 J200 ...

Page 71: ...training and service purposes LGE Internal Use Only START Does the SIM cardsupport 3V or 1 8V Change the SIM Card Only supports 3V or 1 8V SIM card No SIM Card will workproperly Yes Check the voltageLevel at TP1 Is 3V or 1 8V Yes Change the SIM Card Or Re download Or Re solder J200 No ...

Page 72: ...Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 13 KEY backlightTrouble Figure 4 13 2 VA215 DNI VBAT 330 R232 LD203 LD202 LD201 DNI VA214 LD200 R233 330 1u C230 R234 330 330 R231 M_KEY_LED1 M_KEY_LED2 TP1 TP2 TP2 TP1 ...

Page 73: ...ight 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only START TP2 VBAT Replace the main board No Backlight will work properly Yes TP1 low Yes Check the state of LED or U100 No ...

Page 74: ...onics Inc All right reserved Only for training and service purposes LGE Internal Use Only 4 14Torch LightTrouble Figure 4 14 2 VA404 LD410 4 3 2 1 LD420 4 3 2 1 LD400 4 3 2 1 R407 4 7 DNI VA408 VBAT TORCH_LED TP1 TP1 LD410 LD400 LD420 Figure 4 14 1 ...

Page 75: ...ronics Inc All right reserved Only for training and service purposes LGE Internal Use Only START TP1 low WhenTorch on Re soldering R407 VA404 No Torch will work properly Yes Are all LEDsWorking Yes Check the soldering each LED LD400 LD410 LD420 No ...

Page 76: ...l Use Only 4 15 Micro SDTrouble Figure 4 15 2 R541 10p 10p VA405 VA407 10p VA406 DNI TP400 SCHB1B0201 S400 ENSY0023802 GND DAT2 CD_DAT3 CMD VDD CLK VSS CARD_DETECT DAT0 COVER_DETECT1 DAT1 47K R414 2 47K R410 2 C409 1u VIO28 R544 DNI R413 470K R412 100K GND TF_DATA0 TF_CMD TF_CLK TF_CHECK TP3 TP2 TP1 Figure 4 15 1 TP1 TP2 TP3 ...

Page 77: ...Internal Use Only START Check the soldering condition Of R410 R412 R41474 Re soldering No Micro SD Card will work properly Yes Micro SD Detect OK Yes Change U100 No Check outTF_CLK Data0Timing OK Replace Micro SD Card Check theTP3 2 8V TF_CHECK TP2 Is High Re attach or ReplaceTP1 Re download SW Yes Yes Yes Yes No No No ...

Page 78: ...pyright 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only 5 DOWNLOAD k G GaG㜼 Onzt s pG GZUWP XUj G G GGaG㜼 iyh psGO tnP YUGzV G 㾡 aG㜼 OGw 㾡ㇵḴ㛺㢀UGP LG A270 LG A270 ...

Page 79: ...5 DOWNLOAD 79 Copyright 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only kss 㾡 a 㜼 On Y_W kssP kssG 㾡 aG㜼 On Y_W UkssP LG A270 LG A270 LG A270 ...

Page 87: ...5 DOWNLOAD 87 Copyright 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only LG A270 LG A270 LG A270 LG A270 LG A270 LG A270 LG A270 LG A270 LG A270 ...

Page 91: ...eceiver Speaker Main Antenna FM Antenna TX MODULE TX RX Memory 30x00 Serial Flash 32 768kHz X TAL 26MHz X TAL Main LCD 1 45 TFT LCD TX RX RF Transceiver FM RADIO 65K 128x128 Digital Baseband Processor MT6251_MTK 78MHz Single Charger MIC 5 pin µ USB connector TA SIM Card 1 Vibrator Keypad 3 5pi Connector Charger Battery Connector Battery SD CARD Flash LED 3 Charging only TA LED 3 Headset ...

Page 92: ...AVSS12_AUD AVSS12N_AUD_DAC AVSS12N_AUD_LDO AVSS28_ABB AVSS33_USB AVSS43_DRV AVSS43_LDOS AVSS43_VCORE AVSS43_VRF VA VCCK12_CORE1 VCCK12_CORE2 VCORE VCORE_FB VDD18SF_IO VDD28_IO VDD28_IO_BPI VDD28_RTC VDRV VFM VIBR VIO18 VIO28 VREF VRF VRF_S VRTC VSF VSIM VSIM2 VSS_DIG1 VSS_DIG2 VTCXO VUSB DVDD28_IO DVDD43_SPK1 DVSS43_SPK2 R112 330k VCORE VBAT R113 7 5K VBUS_LDO_4V9 C126 2 2u C111 1u 1UF C116 VIO18 ...

Page 93: ...63 R264 330 330 R265 R266 330 VIO28 C510 5 6p ZD501 VBAT 5 5 V SMD 480pF 1005 SEVY0003901 VA201 R543 1K 39p C508 R233 330 C207 ECCH0000151 4 7n C203 39pF VB200 2 1 VA227 EDTY0012501 Diode TVS SEMTECH VA228 TP200 KB216 1u C230 VBUS_USB R234 330 10u C215 39pF C218 C219 0 033uF C221 39pF C216 39pF R217 2 2Kohms R213 1Kohms VMIC_BIAS_P 100ohms R219 R218 100ohms 2 2Kohms R220 47n C231 R270 33p C220 39p...

Page 94: ...N VSW_EN BS RSVD1 RSVD2 GND1 GND2 VBATT1 VBATT2 GND3 GND4 GND5 GND6 GND7 Rx2 RSVD3 Rx1 RSVD TxEN VRAMP GND8 GND9 GND10 ANT GND11 GND12 GND13 PGND SC301 1 L314 0 5p C305 1p VBAT 22p C350 220p C304 1 2 L310 1n 12n L381 L350 3 6n 24K R391 33p C311 DNI C312 DNI C301 C302 33p L390 10n 12n L380 2 2p C306 2 2p C300 C310 1 5p 1 5p C317 L308 3 3n L311 3 3n D301 EAH61533301 L312 5 6n ANT301 L391 10n L303 12...

Page 95: ...F R528 1K VA402 R498 100ohms VA403 100ohms R418 100ohms R420 R495 100ohms DNI VA408 C405 27p FB402 1800 FB403 1800 0 1uF C513 C512 0 1uF VIO28 R540 10K C419 10u C400 1u 100ohms R497 R1 120K SCHB1B0201 S400 ENSY0023802 GND DAT2 CD_DAT3 CMD VDD CLK VSS CARD_DETECT DAT0 COVER_DETECT1 DAT1 47K R414 2 47K R410 2 C409 1u VIO28 R544 DNI R413 470K R412 100K R542 1 5K VMIC_BIAS_P L402 0 1uH L403 0 1uH 1800...

Page 96: ...rnal Use Only Copyright 2012 LG Electronics Inc All right reserved O nly for training and service purposes LGE Internal Use Only 76 8 BGA PIN MAP TopView BGA IC pin check U100 ؼ Ball Diagram Top View MT6251 Mediatek Not USE 9 BGA PIN MAP 8 BGA PIN MAP BGA IC pin check U100 Ball Diagram Top View MT6251 Mediatek Not USE ...

Page 97: ...1 KB213 KB218 R217 R266 TP104 KB214 VA205 R257 VA204 R265 R258 R264 R263 R262 VA215 LD200 R219 C216 R218 C217 C218 L202 C219 L203 VA202 C220 KB217 KB204 C230 R232 R233 R231 R234 LD203 VA214 VA208 R261 R260 VA206 VA207 R259 LD202 D400 C422 L401 L404 C406 R455 KB216 KB210 KB215 9 PCB LAYOUT LGA270_MAIN_EAX64750301_1 0_TOP CN201 SPK contact pad No RCV SPK sound CN400 LCD connector No LCD Display LD20...

Page 98: ...6 VA403 R540 FB403 R420 R528 C419 R423 L403 R418 R154 VB200 C108 C100 C118 C122 R112 C126 R113 R111 C103 C350 C304 R391 R392 C302 C312 L302 L308 C303 C317 C311 L310 VA405 VA407 R544 R541 VA406 C307 L392 C305 ANT300 VA222 C243 R229 VA225 J400 FB401 C411 D301 VA401 L402 R421 R419 ANT304 R256 R155 VA221 C115 C116 R370 C301 R394 U300 R414 R413 R230 C316 C229 VA224 R355 C399 C398 L314 C360 C361 C321 C3...

Page 99: ...nternal Use Only 77 10 ENGINEERINGMODE 10 ENGINEERING MODE Engineering mode is designed to allow a service man engineer to view and test the basic functions provided by a handset The key sequence for switching the engineering mode on is 3845 270 Select Pressing END will switch back to non engineering mode operation Use Up and Down key to select a menu and press select key to progress the test Pres...

Page 100: ...e Only 78 11 1 Overview Auto cal Auto Calibration is the PC side Calibration tool that perform Tx Rx and Battery Calibration with Agilent 8960 GSM call setting instrument and Tektronix PS2521G Programmable Power supply Auto cal generates calibration data by communicating with phone and measuring equipment then write it into calibration data block of flash memory in GSM phone 11 AUTO CALIBRATION 11...

Page 101: ... Data I O Auto Test Logic Tachyon Logic Control dll for communication with system Config ini configuration files for port setting and cable loss Model configuration files for each model OCX component files for Tachyon PhoneCmd files for communication with phone Report test result files Temp store calibration value 11 3 2 File Explain Model_Calibration xml stored data for calibration Model_CallSetu...

Page 102: ...ing and service purposes LGE Internal Use Only 80 11 AUTO CALIBRATION 11 4 How to use Tachyon 11 4 1 Modelselection Follow the procedure before start calibration auto test a Clickthe icon in tool bar b Select model name and then do double click the buyer name You will see configuration files loaded in the right window with PASS information above Example of selection of model name Solution MTK Mode...

Page 103: ...lectronics Inc All right reserved O nly for training and service purposes LGE Internal Use Only 81 11 AUTO CALIBRATION 11 4 2 Start cal auto a Click calibration autotest button in tool bar b Calibration autotest will be executed in order 1 Precede Action NV write Test command send 2 RF Calibration 3 RF Auto test 4 After action Phone reset Change UE to AMSS ...

Page 104: ...right 2012 LG Electronics Inc All right reserved O nly for training and service purposes LGE Internal Use Only 82 11 AUTO CALIBRATION 1 Model Selection 2 Calibration Test 3 Not Support 4 Stop 5 Test Only 6 Calibration Only 7 Phone Control 8 Loss Adjustment 9 System Option 10 Run Option 11 Voltage Current Setting 12 Show Result 11 4 3 Toolbar ...

Page 105: ... 11 5 Target Power 30 0 dBm 30 0 dBm 30 0 dBm Max power 1909 8 MHz 1880 MHz 1850 2 MHz Frequency 810 661 512 Channel PCS 1900 30 0 dBm 30 0 dBm 30 0 dBm Max power 1784 8 MHz 1747 6 MHz 1710 2 MHz Frequency 885 699 512 Channel DCS1800 32 5 dBm 32 5 dBm 32 5 dBm Max power 914 8 MHz 897 4 MHz 880 2 MHz Frequency 124 37 975 Channel EGSM 900 32 5 dBm 32 5 dBm 32 5 dBm Max power 848 8 MHz 836 8 MHz 824 ...

Page 106: ...00 MBK00 SUMY00 EAC00 MCK00 Cover Assembly Front Speaker Dual Mode Button Window LCD Tape Window Cover Assembly Rear Motor DC PIFA Antenna Multiple Cap Receptacle PCB Assembly Main Dome Assembly Metal LCD Module Can Shield Microphone Condenser Rechargeable Battery Lithium Ion Cover Battery MKC00 MJN00 ACQ00 EAB00 MBG00 EAJ00 EBR00 MBK00 ADB00 SUMY00 ACQ01 SJMY00 MBL00 EAA00 EAC00 MCK00 12 EXPLODED...

Page 107: ... BLACK 4 MCK032700 Cover Front MCK67119901 MOLD LUPOY LGA270 ATHABK BK BLACK BLACK 4 MCQ043300 Damper LCD MCQ66951501 COMPLEX LGA270 ATHABK BK BLACK BLACK 4 MKC00 Window LCD MKC64322702 CUTTING ACRYL LGA270 ATCLBK BK BLACK BLACK 4 MCQ074200 Damper Speaker MCQ66999801 COMPLEX LGA270 ATHABK BK BLACK BLACK 12 2 ReplacementParts Mechanic component 4 MDJ000000 Filter MDJ63407401 COMPLEX LGA270 ATHABK B...

Page 108: ...8301 COMPLEX LG VX6000 ZZ Without Color PID Label 4 Array PRINTING 6 SC301 Can Shield MBK63254901 PRESS SUS 0 2 LGA270 ATHABK BK BLACK BLACK 1 AGF000000 Package Assembly AGF76558804 LGA270 ATCLBK ZZ Without Color LGA270 TCLBK TR3B Unitbox Sleeve TCL UB LB TCL SEAL PO Label 600ea COMPLEX KS360 AACNRD ZZ Without Color TR3 2 MAY047100 Box Master MBEE0059811 COMPLEX KS360 AACNRD ZZ Without Color TR3 S...

Page 109: ...CL00 Cap Box MCCL0000408 COMPLEX KG270 CIS ZZ Without Color 3 M01PBZ Damper MPBZ0036846 COMPLEX KG225 TMU ZZ Without Color 3 MPBZ00 Damper MPBZ0219607 COMPLEX KF350d TCLSV ZZ Without Color 2 MEZ000000 Label MLAZ0050901 COMPLEX KU990 AGBRBK ZZ Without Color Battery Warning Label Lithium ion Battery Label 2 MEZ084100 Label Unit Box MLAQ0018017 PRINTING KF755d TCLGD ZZ Without Color 3445 TCL Seal Lab...

Page 110: ...KI M01747 abg 5DB 5 0 1 Metal Stamping Type KOMATECH CO LTD 3 EBR00 PCB Assembly Main EBR75627802 LGA270 ATCLBK 1 0 Main 4 EBR071500 PCB Assembly Main Insert EBR74361401 LGA270 ATHABK 1 0 Main 5 EAJ00 LCD Module EAJ62127601 TM014EDH23 SQQVGA 1 44INCH 128x128 210CD COLOR 50 4 3 500 1 60Hz Inverter N 32 36x38 00x2 6t Shanghai Tianma Micro Electronics Co Ltd 5 SUMY00 Microphone Conde nser SUMY0003815...

Page 111: ...ATA MANUFACTURING CO LTD 6 D400 Diode TVS EDTY0009401 VMNZ6 8CST2R 5 78V 0 10V 0A 100mW VMN2 R TP 2P 1 ROHM 6 R217 R220 Resistor Chip ERHZ0000443 MCR01MZP5J222 2 2KOHM 5 1 16W 1005 R TP ROHM 6 C230 Capacitor Ceramic Chip ECZH0001215 C1005X5R1A105KT000F 1uF 10 10V X5R 55TO 85C 1005 R TP TDK KOREA COOPERATION 6 L401 Inductor Multilayer Chip ELCH0001045 1608GC2TR10JLF 100NH 5 300mA 1OHM 600MHZ 12 SHI...

Page 112: ...1600 PCB Assembly Main SMT Bottom EBR74201601 LGA270 ATHABK 1 1 Main 6 D301 Diode TVS EAH61533301 RCLAMP0521PA TCT 5V 6V min 9 3V typ 11V max 15V 4A SLP1006P2 R TP 2P 1 SEMTECH INTERNATIONAL AG 6 R156 R157 R158 Resistor Chip ERHZ0000504 MCR01MZP5J680 68OHM 5 1 16W 1005 R TP ROHM 6 VA200 VA201 Diode TVS EDTY0012501 UCLAMP3311T TCT 3 3V 3 5V min 6 5V 5A SLP1006P2T R TP 2P 1 SEMTECH CORPORATION 6 R21...

Page 113: ...55A390J 39pF 5 50V NP0 55TO 125C 1005 R TP ROHM Semiconductor KOREA CORPORATION 6 C126 Capacitor Ceramic Chip ECCH0000198 CL05A225MQ5NSNC 2 2uF 20 6 3V X5R 55TO 85C 1005 R TP SAMSUNG ELECTRO MECHANICS CO LTD 6 R112 Resistor Chip ERHZ0000538 MCR01MZP5F3303 330KOHM 1 1 16W 1005 R TP ROHM 6 C361 Capacitor Ceramic Chip ECZH0000839 C1005C0G1H4R7CT000F 4 7pF 0 25PF 50V NP0 55TO 125C 1005 R TP TDK KOREA ...

Page 114: ...00124 MCR01MZP5F7501 7 5KOHM 1 1 16W 1005 R TP ROHM 6 C360 Capacitor Ceramic Chip ECCH0000195 GRM1555C1H3R9C 3 9pF 0 25PF 50V NP0 55TO 125C 1005 R TP MURATA MANUFACTURING CO LTD 6 L390 L391 Inductor Multilayer Chip ELCH0001409 LL1005 FHL10NJ 10NH 5 300mA 0 3OHM 4 3GHZ 9 SHIELD NONE 1 0X0 5X0 5MM R TP TOKO INC 6 R140 Resistor Chip ERHZ0000457 MCR01MZP5J300 30OHM 5 1 16W 1005 R TP ROHM 6 R237 R238 R...

Page 115: ...F 1uF 10 10V X5R 55TO 85C 1005 R TP TDK KOREA COOPERATION 6 L308 L311 Inductor Multilayer Chip ELCH0001034 HK1005 3N3S T 3 3NH 0 3NH 300mA 0 16OHM 6GHZ 8 SHIELD NONE 1 0X0 5X0 5MM R TP TAIYO YUDEN CO LTD 6 L314 Capacitor Ceramic Chip ECZH0001002 C1005CH1H0R5BT000F 0 5pF 0 1PF 50V NP0 55TO 125C 1005 R TP TDK KOREA COOPERATION 6 R254 R412 Resistor Chip ERHZ0000406 MCR01MZP5J104 100KOHM 5 1 16W 1005 ...

Page 116: ...CR01MZP5F4703 470KOHM 1 1 16W 1005 R TP ROHM 6 R421 R422 R423 R424 Resistor Chip ERHZ0000204 MCR01MZP5F1003 100KOHM 1 1 16W 1005 R TP ROHM 6 R253 Resistor Chip ERHZ0000264 MCR01MZP5F3001 3KOHM 1 1 16W 1005 R TP ROHM 6 L380 L381 Inductor Multilayer Chip ELCH0004701 1005GC2T12NJLF 12NH 5 250mA 0 48OHM 2 1GHZ 8 SHIELD NONE 1 0X0 5X0 5MM R TP PILKOR ELECTRONICS LTD 6 C302 C311 R270 Capacitor Ceramic C...

Page 117: ...5 TSX 3225 TSX 3225 26 MHz 10 PPM 8 pF 40 ohm SMD 32X25X0 6 X Tal Infinion chip Pb Free EPSON TOYOCOM CORP EPSON TOYOCOM CORP 6 ZD501 Diode Zener EDNY0013602 EDZTE615 1B 4 98V 4 98TO5 2V 80OHM 150mW EMD2 R TP 2P 1 ROHM Semiconductor KOREA CORPORATION 6 J400 Jack Phone ENJE0008001 JAM3333 F32 7F 1P 4P ANGLE R TP 4mM BLACK 6P HON HAI PRECISION INDUSTRY CO LTD 6 X101 Crystal EXXY0004602 MC 146 12 5PF...

Page 118: ...HENZHEN EVERWIN PRECISION TECHNOLOGY CO LTD 6 C305 Capacitor Ceramic Chip ECZH0000802 C1005C0G1H010CT 1pF 0 25PF 50V NP0 55TO 125C 1005 R TP TDK KOREA COOPERATION 6 R542 Resistor Chip ERHZ0000220 MCR01MZP5F1501 1 5KOHM 1 1 16W 1005 R TP ROHM 6 R1 Resistor Chip ERHZ0000414 MCR01MZP5J124 120KOHM 5 1 16W 1005 R TP ROHM 6 SW300 Connector RF ENWY0004501 RF500 0 13MM STRAIGHT SOCKET SMD T REEL AU 50OHM ...

Page 119: ...x5 7 BLACK Bar Type 553450 950mAh Bar Type WW Up LG Chem LTD 2 AFN053800 Manual Assembly Operation AFN75740604 LGA270 ATCLBK ZZ Without Color Manual assy for LGA270 TCL 3 MBM062600 Card Quick Reference MBM63635901 COMPLEX LGP350F ATCLBK ZZ Without Color 3 MBM087200 Card Warranty MCDF0007501 COMPLEX L1400 TCLSV ZZ Without Color L1400 warranty card for Telcel in Mexico PRINTING 3 MFL053800 Manual Op...

Search results

Summary of Contents for LG-A270

Reviews:

Related manuals for LG-A270

Brands by name

Popular brands

LG LG-A270, Service Manual

Search results

Summary of Contents for LG-A270

Reviews:

Related manuals for LG-A270

Brands by name

Popular brands