LG U250 Service Manual Download Page 96

Page: 96 / 175

4. TROUBLE SHOOTING

- 97 -

[ Charger Troubleshooting Flow ]

Start

Check the pin and battery
Connect terminals of I/O
connector

Connection OK?

Change I/O connector

Is the TA (or USB Cable)

voltage 5.1V (or 5.0V)?

Change TA

(or USB Cable)

Is it charging properly

After turning on Q301(or Q302)

, Q302?

END

Change the board

Yes

Summary of Contents for U250

Page 1: ...Date June 2007 Issue 1 0 Service Manual Model U250 KU250 Service Manual U250 KU250 ...

Page 2: ...Block 92 4 9 Power ON Troubleshooting 94 4 10 Charger Troubleshooting 96 4 11 USB Troubleshooting 99 4 12 SIM Detect Troubleshooting 100 4 13 Camera Troubleshooting 102 4 14 Keypad Backlight Troubleshooting 105 4 15 Main LCD Troubleshooting 106 4 16 Receiver Path 107 4 17 Headset path 109 4 18 Speaker phone path 111 4 19 Main microphone 113 4 20 Headset microphone 115 4 21 Vibrator 117 5 DOWNLOAD ...

Page 3: ... 4 ...

Page 4: ...ble for any charges that resultfrom 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 is not done C Changes i...

Page 5: ...ipment 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 board they should sp...

Page 6: ...CDMA Tx 12 dBm Voice with 950mAh Over 180 min GSM Max Tx Power Voice Standby Time Over 350 Hrs WCDMA DRX 1 28 with 950mAh Over 450 Hrs GSM Paging period 9 Antenna Internal type LCD Main 1 76 TFT QCIF 262K LCD Backlight White LED Back Light Camera 1 3 Mega pixel VGA Video Call Camera Vibrator Yes Cylinder Type LED Indicator No MIC Yes Receiver Yes Earphone Jack Yes 18 pin Connectivity Bluetooth USB...

Page 7: ...age Temp 20 70 C Humidity 85 Max Reference Spec Min Typ Max Unit TA Power Available power 100 220 240 Vac No Item GSM DCS PCS 100k 1GHz 39dBm 9k 1GHz 39dBm MS allocated 1G A MHz 33dBm Channel 1G 12 75GHz 33dBm A M B MHz 39dBm Conducted B M 12 75GHz 33dBm 1 Spurious 100k 880MHz 60dBm 100k 880MHz 60dBm Emission 880M 915MHz 62dBm 880M 915MHz 62dBm Idle Mode 915M 1GHz 60dBm 915M 1GHz 60dBm 1G A MHz 50...

Page 8: ...r 0 1ppm 0 1ppm 4 Phase Error 5 RMS 5 RMS 20 PEAK 20 PEAK 3dB below reference sensitivity 3dB below reference sensitivity Frequency Error RA250 200Hz RA250 250Hz 5 Under Multipath and HT100 100Hz HT100 250Hz Interference Condition TU50 100Hz TU50 150Hz TU3 150Hz TU1 5 200Hz 0 100kHz 0 5dB 0 100kHz 0 5dB 200kHz 30dB 200kHz 30dB 250kHz 33dB 250kHz 33dB Due to 400kHz 60dB 400kHz 60dB Output RF modula...

Page 9: ...al Power control Power Tolerance Power control Power Tolerance Level dBm dB Level dBm dB 5 33 3 0 30 3 6 31 3 1 28 3 7 29 3 2 26 3 8 27 3 3 24 3 9 25 3 4 22 3 10 23 3 5 20 3 8 Transmitter Output Power 11 21 3 6 18 3 12 19 3 7 16 3 13 17 3 8 14 3 14 15 3 9 12 4 15 13 3 10 10 4 16 11 5 11 8 4 17 9 5 12 6 4 18 7 5 13 4 4 19 5 5 14 2 5 15 0 5 9 Burst timing Mask IN Mask IN ...

Page 10: ...wer 50dBm 3 84MHz Qin Qout PCCH quality levels 6 Out of synchronization handling of output power Toff DPCCH Ior 22 28dB Ton DPCCH Ior 24 18dB 7 Transmit OFF Power 56dBm 3 84MHz 8 Transmit ON OFF Time Mask 25us PRACH CPCH uplinlk compressed mode 25us 9 Change of TFC Power varies according to the data rate DTX DPCH off minimize interference between UE 10 Power setting in uplink compressed 3dB after ...

Page 11: ...MHz Interferer 40dBc 16 Error Vector Magnitude EVM 17 5 20dBm 12 2K 1DPDCH 1DPCCH 17 Transmit OFF Power 15dB SF 4 768Kbps Multi code transmission No Item GSM DCS PCS 1 Sensitivity TCH FS Class II 105dBm 105dBm 2 Co Channel Rejection C Ic 7dB Storage 30 85 TCH FS Class II RBER TU high FH 3 Adjacent Channel 200kHz C Ia1 12dB C Ia1 12dB Rejection 400kHz C Ia2 44dB C Ia2 44dB Wanted Signal 98dBm 1st W...

Page 12: ... UE 20dBm output power Class3 44dBm 3 84MHz f 2050 2095 and 2185 2230MHz UE 20dBm output power Class3 30dBm 3 84MHz f 2025 2050 and 5 Out band Blocking 2230 2255MHz UE 20dBm output power Class3 15dBm 3 84MHz f 1 2025 and 2255 12500MHz UE 20dBm output power Class3 6 Spurious Response 44dBm CW UE 20dBm output power Class3 46dBm CW 10MHz 7 Intermodulation Characteristic 46dBm 3 84MHz 20MHz UE 20dBm o...

Page 13: ... Cell off VT Test Condition Speaker off LCD backlight On 2 5 RSSI BAR Stand by Voice Call VT WCDMA Under 2 80 mA Under 290 mA Under 410mA DRX 1 28 Tx 12dBm Tx 12dBm Under 2 12 mA Under 320 mA GSM Paging 9 period Max Tx Power Level Change WCDMA GSM BAR 4 3 85 2 dBm 90 2 dBm BAR 3 2 95 2 dBm 95 2 dBm BAR 2 1 106 2 dBm 100 2 dBm BAR 1 0 111 2 dBm 106 2 dBm ...

Page 14: ...tion Standby Bar 4 Over 3 83 0 05V Bar 4 3 3 82 0 05V Bar 3 2 3 73 0 05V Bar 2 1 3 68 0 05V Bar 1 Empty 3 58 0 05V Low Voltage 3 58 0 05V Stand by 3 58 0 05V Talk Warning message Blinking Interval 3min Stand by 1min Talk Power Off 3 20 0 05V ...

Page 15: ...r 4 3 dB Max 15 3 dB 3 Side Tone Masking Rating STMR Min 17 dB 4 Echo Loss EL Min 40 dB 5 Idle Noise Sending INS Max 64 dBm0p 6 Idle Noise Receiving INR Nor Under 47 dBPA Max Under 36 dBPA 7 Sending Loudness Rating SLR 8 3dB 8 Receiving Loudness Rating RLR Nor 1 3 dB Max 12 3 dB 9 Side Tone Masking Rating STMR Min 25 dB 10 Echo Loss EL Min 40 dB 11 Idle Noise Sending INS Max 55 dBm0p 12 Idle Noise...

Page 16: ...signals between RF and baseband The quad band GSM transmitters use a baseband to IF upconversion followed by an offset phase locked loop that translates the GMSK modulated signal to RF UMTS 2100 GSM 900 1800 1900 Bluetooth 1 RTR6275 for GSM Tx and WCDMA Tx 2 RTR6275 for GSM Rx and WCDMA Rx 3 Bluetooth RF module 4 PM6650 for power management 1 QUALCOMM s branded chipset that implements a Zero IF ra...

Page 17: ...eband outputs are shared with the UMTS receiver and routed to the MSM IC for further signal processing The GSM transmit paths employ one stage of up conversion and in order to improve efficiency 1 The on chip quadrature up converter translates the GMSK modulated signal to a constant envelope phase signal at RF 2 The amplitude modulated AM component is applied to the ramping control pin of power am...

Page 18: ...e of six paths 1 UMTS 2100 Rx Tx 2 GSM 900 Rx 3 GSM 900 Tx 4 DCS 1800 Rx and 5 DCS 1800 Tx PCS 1900 Tx High Band Tx s share the same path 6 PCS 1900 Rx UMTS operation requires simultaneous reception and transmission so the UMTS Rx Tx connection is routed to a duplexer that separates receive and transmit signals The GSM900 DCS and PCS operation is time division duplexed so only the receiver or tran...

Page 19: ...gnals are routed to the RTR6275 through band selection filters and matching networks that transform single ended 50 Ω sources to differential impedances optimized for gain and noise figure The RTR input uses a differential configuration to improve second order inter modulation and common mode rejection performance The RTR6275 input stages include MSM controlled gain adjustments that maximize recei...

Page 20: ...3 TECHNICAL BRIEF 21 Fig 1 2 RTR6275 RX feature ...

Page 21: ...tarting value is shown in Figure1 3 The RTR6275 IC is able to support GSM 900 and GSM 1800 1900 mode transmitting This design guideline shows a tri band GSM application Both high band and low band outputs are followed by resistive pads to ensure that the load presented to the outputs remains close to 50ohm The low band GSM Tx path also includes a Tx band SAW filter to remove noise spurious compone...

Page 22: ...iltered and applied to the quadrature up converter mixers The up converter output is amplified by multiple variable gain stages that provide transmit AGC control The AGC output is filtered and applied to the driver amplifier this output stage includes an integrated matching inductor that simplifies the external matching network to a single series capacitor to achieve the desired 50 Ω interface The...

Page 23: ...3 TECHNICAL BRIEF 24 Figure 1 4 RTR6275 IC functional block diagram WCDMA_2100_TX WCDMA_2100_RX ...

Page 24: ...ch the PLL is phase and frequency locked The RTR6275 IC integrates most of PLL loop filter components on chip except two off chip loop filter series capacitors and significantly reduces off chip component requirement With the integrated fractional N PLL synthesizers the RTR6275 has the advantages of more flexible loop bandwidth control fast lock time and low integrated phase error 3 5 Off chip RF ...

Page 25: ...ol circuits within the MSM6245 IC require a reference voltage for proper operation and sufficient accuracy Connecting the PM6650 IC REF_OUT directly to the MSM6245 IC GSM_PA_PWR_CTL_REF provides this reference This sensitive analog signal needs a 0 1 ÏF low frequency filter near to MSM side and isolate from digital logic and clock traces with ground on both sides plus ground above and below if rou...

Page 26: ...ling DVS for MSMC and PA Eleven low dropout regulator circuits with programmable output voltages implemented using three different current ratings 300 mA two 150 mA six and 50 mA three These can be used to power MSMA MSMP RFRX1 RFRX2 RFTX SYNT TCXO WLAN MMC USB and RUIM circuits All regulators can be individually enabled disabled for power savings Low power mode available on MSMA and MSMP regulato...

Page 27: ...wer on sequencing including the MSM device s reset signal Several events continuously monitored for triggering power on power off sequences Supports and orchestrates soft resets USB OTG transceiver for full speed 12 Mb s and low speed 1 5 Mb s interfacing of the MSM device to computers as a USB peripheral or connecting the MSM device to other peripherals RUIM level translators enable MSM device in...

Page 28: ...3 TECHNICAL BRIEF 29 Figure1 7 PM6650 Block Diagram ...

Page 29: ...operations This eliminates the need for any external couplers power detectors current sensing etc to assure the output power level The module has Tx enable and band select inputs Module construction is a low profile overmolded land grid array on laminate 3 TECHNICAL BRIEF 30 Figure 1 8 GSM PAM Schematic GSM_PA_BAND MODE 8 86dB HIGH Rev D EGSM GSM DCS PCS Rev 1 0 LOW 7 5dB C136 0 01u 10nH L116 L406...

Page 30: ...d isolation the transmit channel power also leaks into the receiver In this case the leakage is outside the receiver passband but at a relatively high level It combines with Rx band jammers to create cross modulation products that fall in band to desensitize the receiver The required Tx band isolation depends on the PA channel power and Tx band losses between the PA and LNA Minimum duplexer Tx ban...

Page 31: ...DC up to the first band of particular concern and from the last band of particular concern to beyond three times the highest passband frequency Tx band leakage the transmitter channel power although attenuated by the duplexer still presents a cross modulation threat in combination with Rx band jammers The RF filter must provide rejection of this Tx band leakage Other frequencies of particular conc...

Page 32: ...ncludes BT baseband embedded BT 1 1 compliant baseband core so the other bluetooth components are an bluetooth RF module and Antenna Figure1 9 shows the bluetooth system architecture in the U250 KU250 Figure1 9 Bluetooth system architecture MSM6245 Bluetooth baseband ...

Page 33: ...for wireless connectivity to peripherals Qcamera with 30 fps QCIF viewfinder resolution and support for 2 MP camera sensors Direct interface to digital camera module with video front end VFE image processing True 3D graphics for advanced wireless gaming SecureMSM v2 0 includes support for Open Mobile Alliance OMA DRM v2 0 SIM lock and IMEI integrity Support for Q fuse Only trusted boot is supporte...

Page 34: ... 2M GSM PAM GSM TX SAW COUPLER VCTCXO Bluetooth RF Module U SIM 1 3M CAM USB MIC SPK RCV KEYPAD NAND SDRAM FLASH MAIN LCD VGA CAM GSM900 Rx GSM1800 Rx GSM1900 Rx GSM900 Tx GSM1800 1900 Tx AntSW Logic WCDMA2100 Tx WCDMA2100 Rx GSM VCO WCDMA VCO HDET GSM Block WCDMA Block Figure 1 10 Simplified Block Diagram ...

Page 35: ...ARM 926ejs With Jazelle UMTS WCDMA BT 1 2 processor Rx ADC Tx DAC MP3 AAC EVRC QCELP AMR CMX MIDI EBI 1 EBI 2 Open GL ES 3D 2D MPEG 4 H 263 H 264 Keypad I F USB UART1 UART2 RUIM1 UART3 PMIC SBI Camera 1 3M I O Conn NAND Flash 512Mbit SDRAM 512Mbit LCD 1 76inch PM6650 GSM GPRS EDGE processor JTAG RF SBI GPIO USIM US B VGA camera Figure 1 11 Simplified Block Diagram of MSM6245 ...

Page 36: ... modes and data rates for W CDMA frequency division duplex FDD with the following restrictions The downlink supports the following specifications Up to four physical channels including the broadcast channel BCH if present Up to three dedicated physical channels DPCHs Spreading factor SF range support from 4 to 256 The following transmit diversity modes are supported Space time transmit diversity S...

Page 37: ...ax No sub rates are supported 3 8 4 GPRS features Packet switched data GPRS DTM Simple Class A operation Multi slot class 12 data services CS schemes CS1 CS2 CS3 and CS4 GEA1 GEA2 and GEA3 ciphering Maximum of four Rx timeslots per frame 3 8 5 EDGE features EDGE E2 power class for 8 PSK DTM simple Class A multi slot class 12 Downlink coding schemes CS 1 4 MCS 1 9 Uplink coding schemes CS 1 4 MCS 1...

Page 38: ...al CPU clock rate with on chip cache Java hardware acceleration Enhanced memory support 75 MHz and 90 MHz bus clock for SDRAM 32 bit SDRAM Dual memory buses separating the high speed memory subsystem EBI1 from low speed peripherals EBI2 such as LCD panels 1 8 memory interface support for EBI1 and 1 8 V or 2 6 V memory interface support EBI2 NAND FLASH memory interface 8 16 bit data I O width NAND ...

Page 39: ...rted AMR NB AMR WB AMR WB AAC AAC Plus Enhanced AAC Plus Windows Media Audio v9 RealAudio v8 Integrated stereo wideband codec for music digital clips CMX Video codecs supported MPEG 4 H 263 H 264 Windows Media v9 and RealNetworks v10 Video telephony services QvideophoneTM A two way mobile video conferencing solution that delivers 15 fps QCIF 64kbps Video codecs supported MPEG 4 and H 263 Audio cod...

Page 40: ... Note 1 At this time only 32 bit SDRAM is supported on the MSM6245 device There are potential MIPS issues when running Bluetooth and video telephony concurrently with any other memory configuration 16 bit SDRAM and NOR FLASH are currently being evaluated and documentation will be updated accrdingly in the next revision Table 1 1 Summary of MSM6245 device features ...

Page 41: ...3 TECHNICAL BRIEF 42 Table 1 2 Description of RF configurations ...

Page 42: ...e Suppression NS and programmable 13 tap Type I FIR Tx Rx compensation filters The MSM6245 device s integrated ARM9TDMI processor downloads the firmware into the QDSP4000 and configures QDSP4000 to support the desired functionality 3 8 12 ARM Microprocessor subsystem The MSM6245 device uses an embedded ARM926EJ S microprocessor This microprocessor through the system software controls most of the f...

Page 43: ...lel LCD interface and a UART interface The function of these pins is documented in the various software releases 3 8 15 UART The MSM6245 device employs three UARTs UART1 has dedicated pins while UART2 and UART3 share multiplexed pins 3 8 16 USB The MSM6245 device integrates a universal serial bus USB controller that supports both unidirectional and bidirectional transceiver interfaces The USB cont...

Page 44: ...ources are applied verifying that they are within acceptable operational limits and coordinates battery and coin cell recharging while maintaining the handset electronics supply voltages Eight programmable output voltages are generated using low dropout voltage regulators all derived from a common trimmed voltage reference A dedicated controller manages the TCXO warm up and signal buffering and ke...

Page 45: ...3 TECHNICAL BRIEF 46 Figure 1 12 PM6650 Functional Block Diagram ...

Page 46: ...For additional accuracy or to capture variations over time this voltage is routed internally to the housekeeping ADC via the analog multiplexer PM6650 circuits monitor voltages at VCHARGER and ICHARGE pins to determine which supply should be used and when to switch between the two supplies These pins are connected to the Source or emitter and Drain or collector contacts of the pass transistor resp...

Page 47: ...IC The trickle charger is on chip programmable current source that supplies current from VDD to pin VBAT Trickle charging can be used for lithium ion and nickelbased batteries with its performance specified below 3 2V The charging current is set to 80mA 3 TECHNICAL BRIEF 48 Parameter Min Typ Max Unit Trickle Current 60 80 100 mA ...

Page 48: ...e battery voltage reaches a target voltage 4 2V The end of constant voltage charging is commonly detected 10 of the full charging current Charging Method CC CV Constant Current Constant Voltage Maximum Charging Voltage 4 2V Maximum Charging Current 600mA Nominal Battery Capacity 950mAh Charger Voltage 5 1V Charging time Max 3h Except time trickle charging Full charge indication current icon stop c...

Page 49: ... memories supported burst NOR burst PSRAM Synchronous DRAM memories supported Byte addressable memory supporting 8 bit 16 bit and 32 bit accesses Pseudo SRAM PSRAM memory support EBI2 Features Support for asynchronous FLASH and SRAM 16bit 8bit Interface support for byte addressable 16bit devices UB_N LB_N signals Support for 8 bit 16bit wide NAND flash Support for parallel LCD interfaces port mapp...

Page 50: ...6245 SDRAM 512Mb NAND 512Mb 64MB DATA 31 0 ADDRESS 14 0 WE CS CAS RAS CLK_EN CLK DQM 3 0 NAND_CS NAND_RE NAND_WE NAND_CLE NAND_WP NAND_ALE NAND_READY DATA 7 0 EBI1 EBI2 Figure 1 14 Simplified Block Diagram of Memory Interface ...

Page 51: ...1_GPIO93 F17 PA_ON0 Q_IM_CH0 AA25 W23 Q_IM_CH1 Q_IP_CH0 Y25 V23 Q_IP_CH1 Q_OUT B12 Q_OUT_N A12 I_IM_CH0 AB25 I_IM_CH1 V25 I_IP_CH0 AC25 I_IP_CH1 W25 B13 I_OUT A13 I_OUT_N D17 GRFC0_GPIO3 B8 GRFC1_AUX_SBDT_GPIO4 A8 GRFC2_GPIO5 D9 GRFC3_GPIO6 F10 H10 GRFC4_AUX_SBCK_GPIO7 GRFC5_AUX_SBST_GPIO8 D11 T23 GRFC7_GPIO10 GRFC8_GPIO11 B4 T19 GRFX6_GPIO9 GP_PDM1_PA_RAN_GE0 H17 GP_PDM2_PA_RAN_GE1 DAC_REF F12 BT...

Page 52: ...rol PA_ON WCDMA 2100 TX Power Amp Enable ANT_SEL 0 2 Ant Switch Module Mode Selection WCDMA GSM Tx Rx DCS PCS Tx Rx GSM_PA_BAND GSM DCS PCS Band Selection of Power Amp GSM_PA_RAMP Power Amp Gain Control of APC_IC GSM_PA_EN Power Amp Gain Control Enable of APC_IC ...

Page 53: ...et USIM_Data USIM Data T Rx 3 11 2 2 UART Interface UART signals are connected to MSM GPIO through IO connector with 115200 bps speed 3 TECHNICAL BRIEF 54 Figure 1 16 SIM Interface Table UART Interface MSM6245 PM6650 USIM USIM CLK USIM Reset USIM Data USIM Data USIM Reset USIM CLK VREG_UIM 2 85V GPIO_Map Name Note GPIO_96 UART_RXD Data_Rx GPIO_95 UART_TXD Data_Tx ...

Page 54: ...gure 1 17 Schematic of USB block MSM6245 Side PM6650 Side Name Note USB_DAT Data to from MSM USB_SE0 Data to from MSM USB_OE_N Out Put Enable of Transceiver USB_VBUS USB_Power From Host PC USB_D USB Data to Host USB_D USB Data to Host G6 UART2_DP_TX_DATA_GPIO88 E4 F4 UART2_RFR_N_GPIO91 L23 UART3_CTS_N_GPIO86 UART3_DP_RX_DATA_GPIO85 M21 M19 UART3_DP_TX_DATA_GPIO84 N26 USB_DAT_VP USB_OE_TP_N N25 N23...

Page 55: ...d RF power levels The MSM6245 device has six analog input pins which are multiplexed to the input of the internal HKADC 3 TECHNICAL BRIEF 56 Figure 1 18 MSM6245 HKADC Block diagram Table HKADC channel table Channel Signal Note HKADC0 AMUX_OUT RF PAM Temperature Check HKADC1 VBATT_SENSE Battery voltage level HKADC2 NC NC HKADC3 NC NC HKADC4 PCB_Rev_ADC PCB Version Check HKADC5 Battery_THERM Battery...

Page 56: ... COL0 COL1 COL2 COL3 COL4 ROW 0 CLR MENU ROW 1 1 2 3 LEFT UP ROW 2 4 5 6 OK RIGHT ROW 3 7 8 9 SEND SEARCH ROW 4 0 DOWN BACK 7 HOT3 4 2 8 1 6 9 HOT4 5 0 3 KEY MAP OK UP 401 LEFT 405 404 400 SEARCH HOT400 403 SND BACK 406 R423 100K 407 DN MENU 408 RIGHT 100K 2 4 6 8 1 3 5 7 RA400 HOT401 CLR 402 409 KEY_ROW 4 KEY_ROW 3 KEY_ROW 2 KEY_ROW 1 KEY_ROW 0 KEY_COL 0 KEY_COL 1 KEY_COL 2 KEY_COL 4 KEY_COL 3 VR...

Page 57: ...EVL14K02200 VA430 0 1uF C411 C424 NA 1u C412 C414 0 1u VSYNC 19 18 HSYNC 7 MCLK 20 PCLK PGND1 32 31 PGND2 PGND3 30 29 PGND4 PGND5 28 27 PGND6 PGND7 26 25 PGND8 9 RESETB 11 SCK SDA 10 STANDBY 12 14 VDDIO AGND1 6 AGND2 17 16 AVDD 22 D0 D1 23 24 D2 D3 1 2 D4 D5 3 4 D6 D7 5 8 DGND1 DGND2 15 21 DGND3 DVDD 13 MEGA_CAM_PWR_DOWN I2C_SDA I2C_SCL MEGA_CAM_RESET_N CAM_VSYNC_OUT CAM_HSYNC_OUT VREG_CAM_AVDD_2 ...

Page 58: ...d MAIN PCB in camera module Pixel Clock 49 152M O CAM_PCLK 20 Vertical Sync O CAM_VSYNC_OUT 19 Horizontal Sync O CAM_HSYNC_OUT 18 GND GND GND 17 GND GND GND 15 AVDD I VREG_CAM_AVDD_2 8V 16 GND GND GND 21 Data O CAM_DATA_OUT 5 3 Data O CAM_DATA_OUT 6 4 Data O CAM_DATA_OUT 7 5 GND GND GND 6 MCLK 7 GND GND GND 8 Camera reset signal I MEGA_CAM_RESET_N 9 I2C_SDA 10 VDDIO I VREG_CAM_AVDD_2 8V 14 DVDD I ...

Page 59: ...6245 Camera I O Power I VREG_AVDD_2 8V 20 Camera I O Power I VREG_AVDD_2 8V 19 Camera reset signal I VGA_CAM_RESET_N 18 I2C Clock I I2C_SCL 17 GND GND GND 15 I2C Data I I2C_SDA 16 GND GND GND 3 Clock for Camera Data Out 12 288M O CAM_PCLK 4 Data O CAM_DATA 0 5 Data O CAM_DATA 1 6 Data O CAM_DATA 2 7 Data O CAM_DATA 3 8 Data O CAM_DATA 4 9 Data O CAM_DATA 5 10 Horizontal Sync O CAM_HSYNC 14 Vertica...

Page 60: ...ure 1 22 Schematic of KEY back light circuit KEY side KEY_BACK_LIGHT LED 8EA REV_B EDLH0013501 EDLH0006001 R418 100ohm 100ohm R415 100ohm R411 R413 100ohm LD408 LEBB S14H LEBB S14H LD405 LD406 LEBB S14H R414 100ohm LD400 LEBB S14H 100ohm R417 LD404 LEBB S14H LEBB S14H LD403 100ohm R416 LEBB S14H LD402 R419 100ohm LEBB S14H LD407 VPWR KYBD_BACKLIGHT ...

Page 61: ... 23 24 25 26 27 28 29 3 30 31 32 CN400 1 10 11 12 13 14 15 16 17 18 19 C409 0 1u 5 G2 10 INOUT_A1 1 2 INOUT_A2 INOUT_A3 3 4 INOUT_A4 9 INOUT_B1 INOUT_B2 8 7 INOUT_B3 INOUT_B4 6 FL400 ICVE21184E150R500FR G1 INOUT_A3 3 INOUT_A4 4 INOUT_B1 9 8 INOUT_B2 INOUT_B3 7 6 INOUT_B4 FL402 ICVE21184E150R500FR 5 G1 10 G2 1 INOUT_A1 INOUT_A2 2 EVL14K02200 VA410 FL403 G1 5 G2 10 INOUT_A1 1 2 INOUT_A2 INOUT_A3 3 4...

Page 62: ...e downlink path amplifies the signal from DBB chip MSM6245 and outputs it to receiver or speaker The receive path can be directed to either one of two earphone amplifiers or the auxiliary output The outputs earphone1 EAR1OP EAR1ON and auxiliary out LINE_P LINE_N are differential outputs Earphone2 HPH_L HPH_R is a single ended output stage designed to drive a headset speaker The microphone interfac...

Page 63: ...MP AUXIN AF19 AUXIP AE19 AA18 AUXOUT 220n 36 R202 C203 10p C204 220n C202 C211 22n C212 0 1u 22n C210 47p C200 LINE_N LINE_P MIC2N MIC1N MIC1P MIC2P HPH_R HPH_L RCV RCV MICBIAS Figure 1 25 Audio part schematics Figure 1 26 Audio part schematics I O CONNECTOR R402 1M C400 0 1u C401 33u 100K R405 100ohm R406 U400 NCS2200SQ2T2G 2 GND 1 OUT VCC 5 3 VIN VIN 4 R403 51K 8 9 19 2 21 3 4 5 6 7 CN401 HSEJ 1...

Page 64: ...O2 10 1 VCC U401 NLAS5223BMNR2G 0 01u C410 SPK_RCV RCV_EN_N SPK_RCV RCV RCV SPK SPK VPWR REV_B EDTY0008606 EDTY0008601 MIC REV_B SUMY0010301 SUMY0003802 C421 39p C420 39p C419 0 1u D403 PSD05 LF INSTPAR PSD05 LF D404 INSTPAR 2 2K R424 47p C417 R425 2 2K 1 2 OB4 15L42 C33L MIC400 C418 0 1u 10u C416 MICBIAS MIC1P MIC1N Figure 1 27 Audio part schematics ...

Page 65: ... 5 6K R430 C423 C428 1u 0 1u R427 1K R429 1K C431 NA C422 0 1u 2 4 INM INP 3 OUTA 5 8 OUTB VM 7 VP 6 1 _SD NCP2890DMR2 U402 BYPASS 5600p C426 RCVP 10u C425 C429 1000p R4285 6K RCVN C430 1000p R426 20K 100nH L402 L401 100nH C4275600p R431 20K SPK_RCV SPK_RCV LINE_P LINE_N VPWR SPK SPK_AMP_EN SPK ...

Page 66: ...3 Speaker MIDI Bell Loud Mode MIDI Speaker Phone Loud Mode Headset Voice Call Headset Speaker Phone Loud Mode Speaker phone Receiver Voice Call Description Receiver Mode Voice Call Device MODE Speaker Receiver EMS1810TP Speaker Receiver 4 42 dB microphone OB4 15L42 C33L MIC400 MIC 5 Ear jack RMBLGG080STSB Ear jack 6 Dual Analog Switch NLAS5223BMNR2G U401 Analog Switch 3 1W Audio Amp Base Band Mode...

Page 67: ... WCDMA 2100 GSM Tri Band 900 1800 1900 Color LCD Main 262K TFT 1 76 Dual Camera 1 3Mega VGA 0 3M 1810 speaker receiver Stereo Headset Speaker phone in GSM and WCDMA MP3 AAC decoder and play MPEG4 encoder decoder and play save JPEG en decoder Supports Bluetooth USB 950 mAh Li Ion ...

Page 68: ...3 TECHNICAL BRIEF 69 2 U250 KU250 Main Component Main board Bottom Main board Top Logic Audio RF Bluetoot h Logic ...

Page 69: ...101 X100 SW100 FL101 U103 U100 FL104 U500 Reference Description Reference Description SW100 Ant Switch module FL104 W2100 Duplex U500 Front End module U103 WCDMA PAM U101 GSM PAM X100 VCTCXO FL101 GSM SAW BT module U100 RTR6275 ...

Page 70: ...HNICAL BRIEF 71 Logic Audio Reference Description Reference Description BAT300 Backup Battery CN401 MMI connector 18pin U303 1 3M Cam LDO CN403 1 3M Cam Connector U402 Audio AMP CN401 CN403 BAT300 U402 U303 ...

Page 71: ...ECHNICAL BRIEF 72 Logic U201 U301 U300 J300 CN400 S300 Reference Description Reference Description U201 MSM6245_A U300 PMIC U301 Memory MCP J300 U SIM socket CN400 Main To LCD Connector S300 T FLASH socket ...

Page 72: ...4 TROUBLE SHOOTING 73 4 1 RF Component 4 TROUBLE SHOOTING LGMC ...

Page 73: ...4 TROUBLE SHOOTING 74 Block Diagram Block Ref Name UMTS Part Name Function Comment ...

Page 74: ...4 TROUBLE SHOOTING 75 4 2 SIGNAL PATH_UMTS RF Common Tx Rx UMTX 2100 Tx Rx UMTX 2100 Tx UMTX 2100 Rx Tx I Q LO RX I Q ...

Page 75: ...4 3 SIGNAL PATH_GSM RF 4 TROUBLE SHOOTING 76 Common Tx Rx GSM900 Tx PCS Rx Tx I Q LO RX I Q DCS PCS Tx EGSM900 RX DCS RX ...

Page 76: ...7SH04FU U104 GND 3 100p C185 0 1u C181 R124 100ohm 1000p C182 R128 100K C183 0 01u 1000p C186 DSA321SCE 19 2M X100 GND 2 5 NC1 NC2 6 7 NC3 NC4 8 OUTPUT 3 4 VCC 1 VCONT 19 2MHz 0 01u C188 C187 1000p VREG_TCXO_2 85V TRK_LO_ADJ TCXO_BT VREG_BT_2 85V TCXO_PM RTR6275_TCXO TP2 TP1 TP3 TP4 Schematic of the VC TCXO Block Test Point of the VC TCXO Block TP1 TP4 TP3 TP2 ...

Page 77: ...4 TROUBLE SHOOTING 78 Check C312 of PMIC U300 Check R213 of MSM U201 T ...

Page 78: ...SM1800_RX2 2 GSM1900_RX1 3 4 GSM1900_RX2 GSM900_RX1 5 6 GSM900_RX2 16 GSM900_TX VDD 19 WCDMA2100 9 ANT 11 CTRL1 18 CTRL2 22 7 GND1 GND10 23 GND2 8 GND3 10 GND4 12 GND5 13 15 GND6 17 GND7 GND8 20 GND9 U500 D5011 33p C109 VREG_RF_SMPS ANT_SEL1 ANT_SEL0 ANT_SEL0 ANT_SEL1 TP1 Schematic of the Front End Module Block Test Point of the Front End Module Block TP1 ...

Page 79: ...4 TROUBLE SHOOTING 80 Logic Table of the FEM TP1 VREG RF SMPS GSM 1800 GSM1900 RX GSM 900 RX GSM 900 TX WCDMA GSM 1800 GSM 1900 TX ...

Page 80: ... 1 IN 4 O1 U102 CP0402A1950DNTR 50OHM 4 3 COUP 2 IN 1 OUT L404 1 8nH 4 5 3 1 NA L122 KRX102U TR100 2 1p C165 3 3p C162 C159 15p R122 130 R119 51 1 5p C154 4 1 RX TX 2 FL104 ACMD 7602 ANT 3 PGND 130 R121 0 1u C170 4 7u C155 47 R120 2 RFOUT 8 1 VCC1 VCC2 10 4 VCONT 5 VREF WS2512_TR1G U103 11 BGND GND1 3 GND2 6 7 GND3 9 GND4 RFIN 0 5p C164 100p C192 C158 15p 1nH L123 10nH C157 VPWR PA_R0 VPWR PWR_DET...

Page 81: ...4 TROUBLE SHOOTING 82 ...

Page 82: ...Tx Power Detected value Check R120 2 TX_AGC_ADJ UMTS RTR6275 Tx Amp Gain Control 3 VREG_TCXO_2 85V UMTS PAM enable C170 about 2 85V 4 VPWR UMTS PAM Main Voltage 3V VPWR 4 2V 5 PA_ON Turns the PA on and off 6 PA_R0 Control signals that step the active PA mode and bias PWR_DET VREG_TCXO_2 85 VPWR ...

Page 83: ...4 3 COUP 2 IN 1 OUT L404 1 8nH 4 5 3 1 NA L122 KRX102U TR100 2 1p C165 C445 2 2p L411 4 7nH 2 2p C161 3 3p 3 O2 4 C162 EFCH2140TDE1 FL103 G1 2 G2 5 IN 1 O1 C159 15p C174 10p R122 130 R119 51 1 5p C154 C444 2 2p 4 1 RX TX 2 FL104 ACMD 7602 ANT 3 PGND L409 4 7nH 130 R121 L121 1nH 0 1u C170 4 7u C155 47 R120 2 RFOUT 8 1 VCC1 VCC2 10 4 VCONT 5 VREF WS2512_TR1G U103 11 BGND GND1 3 GND2 6 7 GND3 9 GND4 ...

Page 84: ...4 TROUBLE SHOOTING 85 ...

Page 85: ...4 TROUBLE SHOOTING 86 4 7 Checking GSM Block 1 3 2 ...

Page 86: ... 12 GND7 13 GND8 14 GND9 16 21 P_GND 19 RSVD_GND VAPC 20 17 VBATT 2 VCC1A 6 VCC1B BS 1 DCS_PCS_IN 3 15 DCS_PCS_OUT EGSM_IN 4 EGSM_OUT 11 ENABLE 18 GND1 5 GND2 7 8 SKY77318 U101 100nH L102 C121 33u C110 C138 33p NA 21 14 GSM18001900_TX GSM1800_RX1 1 GSM1800_RX2 2 GSM1900_RX1 3 4 GSM1900_RX2 GSM900_RX1 5 6 GSM900_RX2 16 GSM900_TX VDD 19 WCDMA2100 9 ANT 11 CTRL1 18 CTRL2 22 7 GND1 GND10 23 GND2 8 GND...

Page 87: ...4 7 3 Checking RF Tx level 4 TROUBLE SHOOTING 88 ...

Page 88: ... PAM Supply Voltage Vcc higher than 3 0V Schematic of GSM PAM Block TP1 TP2 TP3 TP4 Rev D EGSM C136 0 01u 10nH L116 100p C438 4 p 1 5nH L403 100ohm 100ohm R113 R117 100ohm R107 C153 15p EFC FL1 C123 0 01u 68p C139 C134 0 01u GND3 9 GND4 10 GND5 GND6 12 GND7 13 GND8 14 GND9 16 21 P_GND 19 RSVD_GND VAPC 20 17 VBATT 2 VCC1A 6 VCC1B BS 1 DCS_PCS_IN 3 15 DCS_PCS_OUT EGSM_IN 4 EGSM_OUT 11 ENABLE 18 GND1...

Page 89: ...124 100p NA C120 0 5p C190 C105 NA 5p C439 NA C116 1 5nH L403 L115 18nH C123 0 01u L111 5 6nH 100nH L102 C121 33u 5 6p C443 C110 33p 21 14 GSM18001900_TX GSM1800_RX1 1 GSM1800_RX2 2 GSM1900_RX1 3 4 GSM1900_RX2 GSM900_RX1 5 6 GSM900_RX2 16 GSM900_TX VDD 19 WCDMA2100 9 ANT 11 CTRL1 18 CTRL2 22 7 GND1 GND10 23 GND2 8 GND3 10 GND4 12 GND5 13 15 GND6 17 GND7 GND8 20 GND9 U500 D5011 33p C109 2 7nH L405 ...

Page 90: ...4 TROUBLE SHOOTING 91 ...

Page 91: ... L126 1000p C171 R118 0 C169 NA 100p C178 1u C172 C179 100p ANT103 FEED NC1 NC2 ACS2450HBAXX C177 0 1uF SYNC_DET_TX_EN 5 VCC_OUT 3 14 VDD_BAT 2 VDD_INT 10 VDD_MSM 7 XTAL_IN 16 ANT CLK_REF 9 GND1 1 GND2 6 GND3 8 GND4 15 PGND1 17 PGND2 18 19 PGND3 PGND4 20 13 RX_BB_TX_BB 11 SBCK SBDT 12 4 SBST LBRQ 2B43A M100 1000p C176 C173 2 2u C180 2 2u 0 R123 BT_DATA TCXO_BT VREG_MSMP_2 7V BT_CLK BT_SBCK BT_SBDT...

Page 92: ...4 TROUBLE SHOOTING 93 Start TP1 TP2 Signals exits TP3 Is clock ok 19 2M TP4 Signals exits Change the Main board Change the M100 NO YES YES YES NO Change the X100 NO Change the Main board ...

Page 93: ...ower up and system reset assert to MSM6245 Phone booting and PS_HOLD assert to PMIC 4 TROUBLE SHOOTING 94 Start Battery voltage higher than 3 20V Key press VREG_MSMC_1 2V VREG_MSMP_2 7V VREG_MSME_1 8V VREG_TCXO_2 85V VREG_MSMA_2 6V power up Is clock ok R306 19 2M X300 32 768Khz Change the Main board Change or charging the Battery Check the Key Dome Change the Main board Check the TXCO NO YES YES Y...

Page 94: ...4 TROUBLE SHOOTING 95 VREG_MSMP VREG_MSMA VREG_MSME VREG_MSMC X300 32 768Khz R306 19 2Mhz U250 KU250 Main PCB BOTTOM ...

Page 95: ...oint Connection of TA or USB Cable Charging current path Battery Troubleshooting Procedure Check the charger TA or USB Cable connector Check the charging current Path Check the battery CHARGER Differential lines route as equal length as possible ICHARGE ICHARGEOUT G S SI3493DV E3 D1 D2 D3 D4 Q301 Q302 QST4 3 B 1 C1 C2 2 5 6 4 0 1 R313 2 C2 5 6 4 QST4 B 3 C1 1 Q300 USB_VBUS ICHARGEOUT VBATT BATT_FE...

Page 96: ...eck the pin and battery Connect terminals of I O connector Connection OK Change I O connector Is the TA or USB Cable voltage 5 1V or 5 0V Change TA or USB Cable Is it charging properly After turning on Q301 or Q302 Q302 END Change the board NO Yes NO Yes NO Yes ...

Page 97: ...4 TROUBLE SHOOTING 98 R313 Q301 Q302 Q300 Charging part Main PCB Front ...

Page 98: ...50 is USB connected to U250 KU250 power on USB_VBUS Q300 go to 5V USB_D go to 3 3V USB_DAT is triggered USB work Start Q400 pin 4 is 5V USB_D is 3 3V Change the Main board Check Q300 pin 4 Check VA401 NO YES YES NO Cable is inserted YES Insert cable NO Power is on YES Go to power on trouble shooting NO ...

Page 99: ...equence of U250 KU250 is USIM_CLK USIM_RST USIM_DATA triggered VREG_UIM_2 85V go to 2 8V USIM IF work Start Work well VREG_UIM_2 85V is 2 85V USIM_P_CLK is run Change the Main board End Check J300 Yes No YES NO Re insert the SIM card Change SIM card Work well End Yes No ...

Page 100: ...M VA302 EVLC18S02003 VA301 EVL14K02200 C353 0 1u smd_1005h_5_r C352 smd_1005h_5_r 33p R317 15K EVLC18S02003 VA300 6 CLK 3 5 GND1 GND2 9 10 GND3 GND4 12 11 GND5 IO 7 2 RST 4 RSV1 8 RSV2 1 VCC VPP J300 HSSC 8P 18 L302 56nH VREG_USIM_2 85V USIM_P_RST_N USIM_P_CLK USIM_P_DATA Figure USIM part schematics ...

Page 101: ...nals are generated by MSM6245 4 13 1 MEGA CAMERA Start Yes NO END Camera is OK Check the camera connector and reconnect the camera Change the Main board Camera is OK Check the CAM_MCLK Change the camera Yes Yes NO NO NO END Yes Change the Main board Change the Main board ...

Page 102: ...GA CAMERA Start Yes NO END Camera is OK Check the camera connector and reconnect the camera Change the Main board Camera is OK Check the CAM_MCLK Change the camera Yes Yes NO NO NO END Yes Change the Main board Change the Main board ...

Page 103: ...O REV_D 6 BGND 2 GND NC 5 STBY 1 3 VIN VOUT 4 BH15LB1WHFV U501 1u C348 1u C447 C349 1u 1u C350 NC2 6 9 PGND VIN 1 8 VOUT1 VOUT2 7 RT9011 MGPQW U303 2 EN1 3 EN2 5 GND NC1 4 1u C347 VREG_CAM_DVDD_1 5V CAM_LDO_EN VPWR VREG_CAM_DVDD_1 8V VREG_CAM_AVDD_2 8V VPWR CAM_LDO_EN ...

Page 104: ...battery NO Yes Yes Key press Change the Main board Yes NO VPWR is above 3 2V KYBD_BACKLIGHT is 0V Backlight LED ON No END YES VPWR KEY_BACK_LIGHT LED 8EA REV_B EDLH0013501 EDLH0006001 R418 100ohm 100ohm R415 100ohm R411 R413 100ohm LD408 LEBB S14H LEBB S14H LD405 LD406 LEBB S14H R414 100ohm LD400 LEBB S14H 100ohm R417 LD404 LEBB S14H LEBB S14H LD403 100ohm R416 LEBB S14H LD402 R419 100ohm LEBB S14...

Page 105: ...are generated by MSM6245 The signal path is MSM6245 CN400 LCD Module Start GO to power on trouble shooting Key LED is on Change the LCD module Yes NO Press END key Disconnect and reconnect The LCD connector END LCD display OK No Yes END LCD display OK No Yes Change the Main board ...

Page 106: ...g Switch U401 Receiver Start Connect the phone to network Equipment and setup call Setup 1KHz tone out NO The sine wave appears at L401 L402 YES NO Can you hear the tone Change receiver YES END Change the Main board The sine wave appears at R421 R422 Check the analog switch YES NO ...

Page 107: ...4 TROUBLE SHOOTING 108 R422 R421 U401 ...

Page 108: ...HPH_L C402 C401 R407 R406 CN401 MMI Connector Start Connect the phone to network equipment and setup call Setup 1KHz tone out and insert headset Can you hear the tone Change the Headset YES NO END Sine wave appears at R407 R406 Change the Main board YES NO ...

Page 109: ...4 TROUBLE SHOOTING 110 C401 C402 R406 C407 CN401 ...

Page 110: ...o network equipment and setup call Setup 1KHz tone out Sine wave appears at R429 R427 and C423 C422 Change the Main board NO SPK_AMP_EN is2 6V Change the Main board NO YES The sine wave appears at SPK_RCV SPK_RCV YES NO Change speaker YES Change the Main board The sine wave appears at SPK SPK Change the Audio Amp NO YES And R431 R426 Can you hear the tone YES NO END ...

Page 111: ...4 TROUBLE SHOOTING 112 Analog Switch Audio Amp SPK ...

Page 112: ... 19 Main microphone MIC400 MIC1P MIC1N MSM6245 Start MIC_BIAS C416 is 1 8V Change main board NO Make a call Change the MIC NO YES Change the Main board Make sound to MIC Work well END YES NO YES Sine wave appears at C418 C419 ...

Page 113: ...4 TROUBLE SHOOTING 114 MIC400 C417 R424 ...

Page 114: ... MSM6245 Start HOOK_KEY is detected Yes END Make a call Change the MAIN board MICBIAS is biased by 1 8V Change the Main board Yes OK NO NO NO Change the headset and retry YES Sine wave appears at C210 C211 Change the headset or Main board and retry NO Yes Change the MAIN board ...

Page 115: ...4 TROUBLE SHOOTING 116 Ear_Sense_N MIC Input ...

Page 116: ...ected between VPWR and VIB_DRV_N PM6650 25 pin The Vibrator motor driver is an SBI programmable voltage out that is reference to VPWR Start Operate the Vibrator NO Change vibrator or PM6650 Work well End Yes RB521S 30 D400 TP401 L400 56nH TP400 VPWR MOTOR_PWR ...

Page 117: ...4 TROUBLE SHOOTING 118 VPWR MOTOR_PWR ...

Page 118: ...9 handsets at the same time 5 1 2 Downloading Procedure Connect the phone to your desktop PC using the USB cable and run the LGMDP application Before getting started set up LGMDP preferences from the Preferences of the file menu the way you want Click on the File menu and select Preferences Play a success sound It will be played a wav file when the download has been completed To enable this simply...

Page 119: ...or downloading images Then click on the Connect button The port number COM7 shall be different from that of the port number in the snapshot The status Ready is displayed when the application is ready for downloading While the images are transmitted from PC to the handset a progressive bar Red box indicating the degree of transmission of data is displayed U250 KU250 ...

Page 120: ...ck to the way they were before you started downloading new images check the option Erase_EFS The calibration data user contents media and module are erased Only calibration data is kept when NV backup restore is checked The user contents and file system physically are wiped out Keep All Contents Maintain user data including WAP AD DRM E mail Play lists and images when downloading a new S W images ...

Page 121: ...rowse The folder name shall be different from that of the folder name in the snapshot The folder name indicates the path where the image files are located 5 DOWNLOAD 122 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 ...

Page 122: ... on the Browse button The selected AMSS image will be downloaded to the handset from the path directory in the PC Make sure that you have chosen correct file In case of wrong AMSS Modem file is file is selected the phone may not work The file name shall be different from that of the file name in the snapshot U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U2...

Page 123: ...button Click on the START button to start downloading A summary of the selected images and option information window will be displayed Click on the No button if this is not the setting you are downloading for Otherwise click on the Yes button to continue downloading selected image file with options 5 DOWNLOAD 124 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU2...

Page 124: ...me in the LGMDP installation directory Backing up NV data and backed up NV data will be stored in the LGMDP installation directory Erasing the existing directories and files before the Module image is downloaded Downloading the AMSS modem image 5 1 2 3 Downloading NV_U250 KU250 U250 KU250 U250 KU250 U250 KU250 ...

Page 125: ...ng NV data which backed up in the Backing up process User can also restore NV data using NV Default image selection Rebooting the handset and re establishing the connection Erasing the existing directories and files before downloading the selected Media image U250 KU250 U250 KU250 ...

Page 126: ...5 DOWNLOAD 127 Downloading Media image in progress Downloading Module image in progress Downloading process has completed successfully U250 KU250 U250 KU250 U250 KU250 ...

Page 127: ...Device Manager allows to monitor current hardware that is installed on your PC Device Manager is designed to monitor USB connectivity and check where the COM has been installed Select Device Manager from the Tools of the file menu ...

Page 128: ...emergency mode Simultaneously press 2 5 and PWR red keys and then try to download all the images up to AMSS In the emergency mode you can not download media or module image The phone supports a special mode called emergency mode In this mode minimum units for downloading is running so that users can download the images again in case of emergency situation AMSS modem Media and Module images can not...

Page 129: ...ure that you have chosen the right image file After choosing valid images then click on the Start button to start downloading selected images The selected image will be downloaded to the handset from the path directory in the PC After downloading images successfully it will boot to normal mode U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 K...

Page 130: ...Restore error Next slide shows the remedial procedure to adopt Connect the handset and Press the Connect button in the Select Port window Enable state in the window indicates that the Phone has been detected and is ready to download U250 KU250 U250 KU250 U250 KU250 ...

Page 131: ... every time NV Backup option was selected and the name of the nv file is determined based on the time when NV Backup was done Choose the desired NV file to be downloaded on the handset and click on Start U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 U250 KU250 ...

Page 132: ...do NV restore and image media and module download 3 The NV data saved at LGMDP folder as following format 4 Recommended that the Module and Media Image have to be downloaded at the same time 5 Erase EFS option will erase everything media module nv items and user data in the EFS area D LGMDP 004400 01 429926 _COM14_ LGMDP folder name IMEI number Port number ...

Page 133: ...6 BLOCK DIAGRAM 134 6 1 GSM UMTS RF Block 6 BLOCK DIAGRAM Fig 2 1 U250 KU250 RF Functional Block Diagram ...

Page 134: ...6 BLOCK DIAGRAM 135 Table 2 1 RF Block Component ...

Page 135: ...6 BLOCK DIAGRAM 136 6 2 Interface Diagram 6 2 1 RTR6275 MSM6245 Interface Diagram Fig 2 2 RTR6275 MSM6245 Interface Diagram ...

Page 136: ...6 BLOCK DIAGRAM 137 6 2 2 Memory Interface Fig 2 3 Memory Interface Diagram ADDRESS 14 0 ...

Page 137: ...6 BLOCK DIAGRAM 138 6 2 3 USB UART SIM JTAG Interface Fig 2 4 USB UART SIM JTAG Interface ...

Page 138: ...omment UMTS PA_CTL signal PA_R0 UMTS Tx High Low Power Control GSM PA_CTL signal GSM_PA_BAND DCS or PCS GSM Mode Selection GSM_PA_EN Power Amp Gain Control Enable GSM_PA_RAMP Power Amp Gain Control ANT_SEL 0 1 Ant Switch Module Mode Selection UMTS GSM900Tx Rx DCS Tx Rx PCS Tx Rx ...

Page 139: ...6 BLOCK DIAGRAM 140 6 2 4 Placement Top Side LGMC ...

Page 140: ...6 BLOCK DIAGRAM 141 Bottom Side LGMC ...

Page 141: ... 142 ...

Page 142: ... O1 100ohm 100ohm R113 R117 100ohm R107 C106 8 2p C153 1000p 15p C159 C182 15p C107 6p C179 C128 100p 22p 3 G2 5 G3 1 IN 4 O1 R110 91 EFCH897MTDB1 FL101 2 G1 C119 22p C123 0 01u 39 R112 C174 R128 100K 10p C183 0 01u C117 10p R122 130 56p 1000p C186 C101 L111 5 6nH 68p C139 3300p R119 51 C114 1 5p C154 47nH L114 C444 2 2p C137 NA ANT G1 G2 RF 12p SW100 KMS 507 4 1 RX TX 2 C112 FL104 ACMD 7602 ANT 3...

Page 143: ...D20 CAMIF_DATA7_GPIO59 CAMIF_DATA8_GPIO60 F16 CAMIF_DATA9_GPIO61 F20 CAMIF_HSYNC_GPIO15 AA11 AC11 A2_6 A2_7 T12 A2_8 W12 AA12 A2_9 AUXIN AF19 AUXIP AE19 AA18 AUXOUT K19 AUX_PCM_CLK_GRFC14_GPIO80 AUX_PCM_DIN_GRFC13_GPIO14 N21 G4 AUX_PCM_DOUT_GRFC12_GPIO103 J8 AUX_PCM_SYNC_GRFC11_GPIO102 BOOT_MODE AE21 AE22 BOOT_MODE2 BOOT_MODE3 AD1 BT_CLK_GPIO25 G23 R19 N1 A2_1 AE9 A2_10 AC12 A2_11 AE12 AF12 A2_12 ...

Page 144: ...PKR_IN_M 79 SPKR_OUT_M 8 FLSH_DRV_N 80 REF_OUT MPP8 67 VREG_RFRX2 68 CBL0PWR_N MPP3 69 VREG_RFRX1 7 BAT_FET_N 70 AMUX_IN1 MPP1 71 VDD_RF 72 AMUX_IN2 MPP2 73 VREG_RFTX 6 VBAT 60 VCOIN 61 REF_ISET 62 REF_GND 63 REF_BYP 64 VREG_WLAN 65 VDD_WLAN 66 CBL1PWR_N MPP4 52 VDD_MSM 53 TCXO_OUT 54 VDD_ANA 55 TCXO_EN 56 VREG_MSMA 57 PS_HOLD 58 TCXO_IN 59 MSM_INT_N 45 SLEEP_CLK 46 XTAL_OUT 47 SBDT 48 VBACKUP 49 ...

Page 145: ...R2 U402 BYPASS 5600p OB4 15L42 C33L MIC400 C426 VA408 EVL14K02200 408 EVLC18S02003 VA400 RCVP RIGHT NA C448 100K 2 4 6 8 1 3 5 7 RA400 47p C408 R404 10K 3 COM1 9 COM2 6 GND IN1 4 IN2 8 5 NC1 NC2 7 NO1 2 NO2 10 1 VCC LEBB S14H U401 NLAS5223BMNR2G LD403 EVL14K02200 10u C425 VA403 C429 1000p R428 EVL14K02200 VA430 EVLC18S02003 5 6K INOUT_A3 3 INOUT_A4 4 INOUT_B1 9 8 INOUT_B2 INOUT_B3 7 6 INOUT_B4 VA4...

Page 146: ... 147 LGMC 8 PCB LAYOUT U250 KU250 ...

Page 147: ... 148 LGMC 8 PCB LAYOUT U250 KU250 ...

Page 148: ...ation of HOT KIMCHI 9 1 1 Configuration of directory Cm_Grut Debug Common dll_serialat Log LG_CL_009 dll Auto Cal CalAuto Directory File C At_Serial_Cmd xml Diag_NV6250_RevB dll Diag_NV dll Diag_NV6275 dll DLL_E5515CD DLL DLL_PwrControlD dll LG_CL_011 dll Dll_SerialATD dll PwrSupply_Cmd xml KU250 KU250 KU250 ...

Page 149: ...og AutoSetup_110 xml Cal_Setup_Test xml Ezlooks xml LG_RfCal_Q3G6280N_Polar_006 dll Procedure_KU250_103 xml script_auto_001 xml script_cal_003 xml Spec_3GPP_030 xml LG_RfTest_E5515C_211 dll ComLMPLib_11 dll Dll_EzLooksMQ_004 dll GuiTk115d dll HK_25 exe ijl11 dll SBCmd xml ShieldBox_DllD dll QMSL_MSVC6R dll ...

Page 150: ...G_UI_Ad6500_002 dll KU250 KU250 KU250 LG_UI_EmKU250_001 dll LG_UI_Qu6250_003 dll LG_UI_Qu6275_004 dll dll ocx MFCO42D DLL MSVCP60D DLL Win98 MFCD DLL COPY bat Win2000 MFCD DLL COPY bat WinXP MFCD DLL COPY bat MFC42D DLL MFCD42D DLL MFCN42D DLL Vsflex7L ocx vsflex7l_ocx_regist bat MSVCRTD DLL 1 _New_HK_0808 reg ...

Page 151: ...t Program Hot Kimchi 152 9 2 How to use HOT KIMCHI Procedure 1 Click Logic Operation of SETTING menu bar 2 Select UART Port that PC can communicate with the phone 3 Select LOGIC MODE that you want Logic Mode 1 Calibration Only ...

Page 152: ...9 Calibration RF Auto Test Program Hot Kimchi 153 Procedure 4 Select the model name U250 KU250 5 Click Start button KU250 Select U250 KU250 Click Start ...

Page 153: ...10 Factory Test Mode 154 10 1 Test Program Setting 1 Open LG FTM GUI 2 Click Options Port Settings 3 Select Com Port and click OK 10 Factory Test Mode ...

Page 154: ...tten at Rx UHF automatically 4 For Deciding to TX AGC insert 380 as a maximum value And then WCDMA Power is decided 5 To set PA Range select ON in R1 for High power mode or select ON in R0 for Low power mode 6 Depending on a situation Click Tx On or Tx Off 7 Set Rx mode Click LNA Range 0 4 8 Click Get IM2 and Get Rx AGC Confirm the value Channel Select Tx Control Rx Control ...

Page 155: ...t menu commands 2 Select RF Mode Click GSM or GSM1800 or GSM1900 3 Write wanted channel We usually set 1 4 For Deciding to PA DAC Value insert 14300 as a maximum value 5 Click Tx On or Tx Off 6 SET RX mode Click LNA Range 0 4 7 Click RX ON Tx Power Control Rx Gain Control Channel Control ...

Page 156: ... 157 1 2 3 4 5 6 7 8 12 13 15 16 17 18 19 20 22 28 29 30 31 32 35 34 33 36 23 24 25 26 27 37 14 11 10 9 11 EXPLODED VIEW REPLACEMENT PART LIST 11 1 EXPLODED VIEW ...

Page 157: ... 158 ...

Page 158: ...4 MFBZ00 FILTER MFBZ0002801 COMPLEX empty Without Color 9 4 MHGJ00 HOLDER SPEAKER MHGJ0001701 COMPLEX empty Black 7 4 MKAZ00 KEYPAD MKAZ0035901 COMPLEX empty Without Color 11 4 MPBG00 PAD LCD MPBG0058301 COMPLEX empty 1 2 Without Color 12 4 MPBT00 PAD CAMERA MPBT0039101 COMPLEX empty 1 2 Without Color 8 4 MTAB00 TAPE PROTECTION MTAB0160501 COMPLEX empty Without Color 1 4 MTAB01 TAPE PROTECTION MTA...

Page 159: ...OR MOTOR SJMY0007903 3 V 0 85 A 4 8 Height 5 8T Cylinder 3V 11000 23 4 SNGF00 ANTENNA GSM FIXED SNGF0023102 3 0 2 dBd EGSM DCS PCS W BAND I INTERNAL QUAD 2 0 50 3 0 20 3 MLAA00 LABEL APPROVAL MLAA0042001 COMPLEX empty Without Color 34 6 MCBA00 CAN SHIELD MCBA0017101 COMPLEX empty Without Color 6 MPBZ00 PAD MPBZ0179301 COMPLEX empty 0 6t Without Color 16 5 ADCA00 DOME ASSY METAL ADCA0064001 Without...

Page 160: ...0 TC 1005 R TP 6 C103 CAP CERAMIC CHIP ECCH0001002 180 pF 50V J NP0 TC 1005 R TP 6 C104 CAP CERAMIC CHIP ECCH0001002 180 pF 50V J NP0 TC 1005 R TP 6 C106 CAP CHIP MAKER ECZH0000846 8 2 pF 50V C NP0 TC 1005 R TP 6 C107 CAP CERAMIC CHIP ECCH0000107 6 pF 50V D NP0 TC 1005 R TP 6 C108 CAP CERAMIC CHIP ECCH0001002 180 pF 50V J NP0 TC 1005 R TP 6 C109 CAP CHIP MAKER ECZH0000830 33 pF 50V J NP0 TC 1005 R...

Page 161: ...43 CAP CERAMIC CHIP ECCH0000182 0 1 uF 10V K X5R HD 1005 R TP 6 C144 CAP CERAMIC CHIP ECCH0000393 22 uF 6 3V M X5R HD 2012 R TP 6 C147 CAP CERAMIC CHIP ECCH0000115 22 pF 50V J NP0 TC 1005 R TP 6 C149 CAP CERAMIC CHIP ECCH0000112 15 pF 50V J NP0 TC 1005 R TP 6 C150 CAP CERAMIC CHIP ECCH0000143 1 nF 50V K X7R HD 1005 R TP 6 C151 CAP CERAMIC CHIP ECCH0000115 22 pF 50V J NP0 TC 1005 R TP 6 C152 CAP CE...

Page 162: ... CHIP MAKER ECZH0000813 100 pF 50V J NP0 TC 1005 R TP 6 C200 CAP CERAMIC CHIP ECCH0000122 47 pF 50V J NP0 TC 1005 R TP 6 C201 CAP CERAMIC CHIP ECCH0000122 47 pF 50V J NP0 TC 1005 R TP 6 C202 CAP CHIP MAKER ECZH0001211 220 nF 10V Z Y5V HD 1005 R TP 6 C203 CAP CHIP MAKER ECZH0001211 220 nF 10V Z Y5V HD 1005 R TP 6 C204 CAP CERAMIC CHIP ECCH0000110 10 pF 50V D NP0 TC 1005 R TP 6 C205 CAP TANTAL CHIP ...

Page 163: ... CHIP ECCH0000143 1 nF 50V K X7R HD 1005 R TP 6 C240 CAP CHIP MAKER ECZH0004402 0 1 uF 16V Z NP0 TC 1005 R TP 6 C242 CAP CHIP MAKER ECZH0004402 0 1 uF 16V Z NP0 TC 1005 R TP 6 C243 CAP CERAMIC CHIP ECCH0000182 0 1 uF 10V K X5R HD 1005 R TP 6 C244 CAP CERAMIC CHIP ECCH0000155 10 nF 16V K X7R HD 1005 R TP 6 C246 CAP CERAMIC CHIP ECCH0000161 33 nF 16V K X7R HD 1005 R TP 6 C247 CAP CERAMIC CHIP ECCH00...

Page 164: ...P CERAMIC CHIP ECCH0000182 0 1 uF 10V K X5R HD 1005 R TP 6 C336 CAP CERAMIC CHIP ECCH0007801 4 7 uF 10V Z Y5V HD 1608 R TP 6 C337 CAP CHIP MAKER ECZH0000816 12 pF 50V J NP0 TC 1005 R TP 6 C338 CAP CHIP MAKER ECZH0000816 12 pF 50V J NP0 TC 1005 R TP 6 C339 CAP CERAMIC CHIP ECCH0005602 2 2 uF 16V K X5R HD 1608 R TP 6 C340 CAP CERAMIC CHIP ECCH0005602 2 2 uF 16V K X5R HD 1608 R TP 6 C341 CAP CERAMIC ...

Page 165: ... CERAMIC CHIP ECCH0000110 10 pF 50V D NP0 TC 1005 R TP 6 C414 CAP CERAMIC CHIP ECCH0000182 0 1 uF 10V K X5R HD 1005 R TP 6 C415 CAP CERAMIC CHIP ECCH0000110 10 pF 50V D NP0 TC 1005 R TP 6 C416 CAP TANTAL CHIP ECTH0003701 10 uF 6 3V M L_ESR 1608 R TP 6 C417 CAP CERAMIC CHIP ECCH0000122 47 pF 50V J NP0 TC 1005 R TP 6 C418 CAP CERAMIC CHIP ECCH0000182 0 1 uF 10V K X5R HD 1005 R TP 6 C419 CAP CERAMIC ...

Page 166: ...IN 0 4 mm ANGLE H 2 5 Reverse Type 6 CN403 CONN SOCKET ENSY0020101 24 PIN ETC 0 9 mm 6 D400 DIODE SWITCHING EDSY0011901 EMD2 30 V 1 A R TP VF 1 5V IF 200mA IR 30uA VR 10V 6 D401 DIODE TVS EDTY0007401 SMD 12 V 350 W R TP 6 D402 DIODE TVS EDTY0008610 SOD 523 5 V 250 W R TP PB FREE 6 D403 DIODE TVS EDTY0008601 SOD 323 6 V 400 W R TP PB FREE 6 D404 DIODE TVS EDTY0008601 SOD 323 6 V 400 W R TP PB FREE ...

Page 167: ... 1 nH S 1005 R TP 6 L123 INDUCTOR CHIP ELCH0005020 1 nH S 1005 R TP 6 L125 INDUCTOR CHIP ELCH0001410 12 nH J 1005 R TP Pb Free 6 L128 INDUCTOR CHIP ELCH0005010 1 8 nH S 1005 R TP 6 L300 INDUCTOR SMD POWER ELCP0008001 4 7 uH M 2 5 2 0 1 0 R TP 6 L301 INDUCTOR SMD POWER ELCP0008001 4 7 uH M 2 5 2 0 1 0 R TP 6 L302 INDUCTOR CHIP ELCH0001550 56 nH J 1608 R TP 6 L305 INDUCTOR SMD POWER ELCP0008001 4 7 ...

Page 168: ...05 R TP 6 R114 RES CHIP ERHY0003301 100 ohm 1 16W J 1005 R TP 6 R115 RES CHIP ERHY0003301 100 ohm 1 16W J 1005 R TP 6 R116 RES CHIP ERHY0003301 100 ohm 1 16W J 1005 R TP 6 R117 RES CHIP ERHY0003301 100 ohm 1 16W J 1005 R TP 6 R118 RES CHIP MAKER ERHZ0000401 0 ohm 1 16W J 1005 R TP 6 R119 RES CHIP MAKER ERHZ0000490 51 ohm 1 16W J 1005 R TP 6 R120 RES CHIP MAKER ERHZ0000483 47 ohm 1 16W J 1005 R TP ...

Page 169: ...TP 6 R317 RES CHIP MAKER ERHZ0000422 15 Kohm 1 16W J 1005 R TP 6 R318 RES CHIP MAKER ERHZ0000487 470 Kohm 1 16W J 1005 R TP 6 R380 RES CHIP MAKER ERHZ0000406 100 Kohm 1 16W J 1005 R TP 6 R400 RES CHIP MAKER ERHZ0000443 2200 ohm 1 16W J 1005 R TP 6 R401 RES CHIP MAKER ERHZ0000530 5 1 Kohm 1 16W J 1005 R TP 6 R402 RES CHIP MAKER ERHZ0000407 1000 Kohm 1 16W J 1005 R TP 6 R403 RES CHIP MAKER ERHZ00004...

Page 170: ...014001 35 5 dBm 56 A dBc dB 6x6x1 15 SMD Tri Band 6 U102 COUPLER RF DIRECTIONAL SCDY0003403 18 dB 25 dB 33 dB 1 0 0 58 0 35 SMD 1920M 1980M 4pin Pb Free empty SMD R TP 6 U103 PAM SMPY0014201 28 dBm 40 465 mA 44 dBc 26 5 dB 4x4x1 1 SMD 6 U104 IC EUSY0073401 SSOP5 P 0 65A 5 PIN R TP INVERTER Pb Free 6 U201 IC EUSY0318401 CSP 409 PIN R TP WEDGE Baseband Platform 6 U300 IC EUSY0306302 BCCS 84 PIN R TP...

Page 171: ...05 6 VA430 VARISTOR SEVY0004201 14 V SMD 120pF 1005 6 VA490 VARISTOR SEVY0004201 14 V SMD 120pF 1005 6 X100 VCTCXO EXSK0005703 19 2 MHz 1 5 PPM 40 pF SMD 3 2 2 5 0 9 1 5PPM 2 8V 3 2 2 5 0 9 SMD P TP 6 X300 X TAL EXXY0004601 032768 MHz 20 PPM 7 pF 65000 ohm SMD 6 9 1 4 1 3 5 SAFD00 PCB ASSY MAIN SMT TOP SAFD0087801 6 CN404 CONN SOCKET ENSY0020001 6 LD400 DIODE LED CHIP EDLH0006001 Blue 1608 R TP Bl...

Page 172: ...c Color Remark 6 R417 RES CHIP ERHY0003301 100 ohm 1 16W J 1005 R TP 6 R418 RES CHIP ERHY0003301 100 ohm 1 16W J 1005 R TP 6 R419 RES CHIP ERHY0003301 100 ohm 1 16W J 1005 R TP 6 R423 RES CHIP MAKER ERHZ0000406 100 Kohm 1 16W J 1005 R TP 6 SPFY00 PCB MAIN SPFY0147601 FR 4 1 0 mm BUILD UP 8 ...

Page 173: ...ack Europe Label Black 35 3 SSAD00 ADAPTOR AC DC SSAD0024501 100 240V 5060 Hz 5 1 V 7 A CE AC DC ADAPTOR 85Vac 264Vac 5 1V 0 15V 0 2V 700mA 5060 WALL 2P I O CONNECTOR ADAPTOR AC DC SSAD0024502 100 240V 5060 Hz 5 1 V 0 7 A CE AC DC ADAPTOR 5 1V 0 15V 0 2V 5 1V 700mA 5060 WALL 2P I O CONNECTOR ADAPTOR AC DC SSAD0024503 100 240V 5060 Hz 5 2 V 0 7 A CE AC DC ADAPTOR 85Vac 264Vac 5 2 0 3V 700mA 5060 WA...

Page 174: ...Note ...

Page 175: ...Note ...

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