Page 1 Internal Use Only Service Manual LG-L25 Date: Dec, 2014 / Issue 0.9...
Page 2: Table Of Contents
3. 20 Touch Trouble Shooting ..............71 3. 21 Vibrator Troubleshooting ............... 74 3. 22 Audio ...................... 76 LGE Internal Use Only - 2 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 4 • When returning system boards or parts like EEPROM to the factory, use the protective package as described. LGE Internal Use Only - 4 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 5: Performance
Classification Function MSM8926 Digital Baseband Processor WTR1625L 4G MODEM PMIC PM8926 PMIC K4E2E304EE-AGCE Mobile SDRAM(LPDDR3) WCN3660A BT/WLAN Tranceiver LGE Internal Use Only - 5 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 6: Hw Features
H.263 P0 Voice Recording Speaker Phone mode Support Travel Adapter CDROM Stereo Headset Data Cable T-Flash (External Memory) LGE Internal Use Only - 6 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 7: Sw Features
Contacts app Group Fixed Dial Number Service Dial Number Read only (add/edit/delete are not Own Number supported) LGE Internal Use Only - 7 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 8 Memo World Clock Unit Convert Stop Watch Wall Paper WAP stack and wml are not WAP Browser supported. LGE Internal Use Only - 8 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 9 Class 12 Hold / Retrieve No / No Conference Call Max. 3 DTMF Memo pad SyncML Hangout Email LGE Internal Use Only - 9 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 10: H/W Spec
6% -> 5% 16% -> 15% Low Battery Pop-up 6% -> 5% Power Off 1% -> 0% 3.4V ~ 3.5V LGE Internal Use Only - 10 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 11: Trouble Shooting
Duplexer FL1108 FL1113 BC0/BC6 Duplexer DRx Filter FL1115 GSM Quad Duplexer DRx Filter B3/B26/BC0 FEMid Diplexer FL1102 B26/BC0/GSM900 Duplexer LGE Internal Use Only - 11 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 12 SW1101 B1/B3/B26 BC0/BC6 ANT6913 GSM Quad ANT1104 ANT6912 ANT1101 RF Switch ANT1105 ANT1107 ANT1109 ANT1106 SW1102 RF Switch LGE Internal Use Only - 12 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 13 ANT1107/1109 B1/B3/B26/BC0/BC6/GSM Quad Main Ant Contact ANT1102/1103 GPS & B1/B11/BC6 Sub Ant Contact ANT1105/1106 B3/B26/BC0 Sub Ant Contact LGE Internal Use Only - 13 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 14: Lte & Wcdma & Cdma & Gsm Tx Signal Path
3.2 LTE & WCDMA & CDMA & GSM Tx SIGNAL PATH B1(WB1)/B3/B26(WB5)/BC0/BC6/GSM Quad Common B1(WB1)/BC6 B26(WB5)/BC0 GSM1800/1900 GSM 850/900 LGE Internal Use Only - 14 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 15: Lte & Wcdma & Cdma & Gsm Rx Signal Path
3.3 LTE & WCDMA & CDMA & GSM Rx SIGNAL PATH B1(WB1)/B3/B26(WB5)/BC0/BC6/GSM Quad PRx Common B1(WB1)/BC6 B26(WB5)/BC0/GSM850 GSM1800/1900 GSM 900 B11 DRx B1(WB1)/BC6 DRx B26(WB5)/BC0 DRx B3 DRx LGE Internal Use Only - 15 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 16 1. Check DC POWER Supply Circuit 2. Check XO 3. Check RF Signal Path Re-Download S/W & Cal LGE Internal Use Only - 16 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 17: Checking Rf Tx Level
TP26 U1102 TP25 Single TP15 TP16 TP11 TP14 TP24 TP22 TP12 TP23 U1300 B1(WB1)/B3/B26(WB5) BC0/BC6 QSM Quad TP21 LGE Internal Use Only - 17 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 18 GND12 RFIN_GSM_HB RFOUT_GSM_LB RFIN_GSM_LB TP14 TP15 TP24 TP25 TP26 PGND VCC2 VCC1 RFOUT RFIN VBAT TP16 SCLK SDATA LGE Internal Use Only - 18 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 19 TP21,22 : Over 3.0V TP23 : Over 1.7V Check TP11(C1301) at U1300 WTR1625L is OK Check OVER -3dBm Change the Board LGE Internal Use Only - 19 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 20 TP21,22 : Over 3.0V TP23 : Over 1.7V Check TP11(C1301) at U1300 WTR1625L is OK Check OVER -3dBm Change the Board LGE Internal Use Only - 20 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 21 TP24,25 : Over 3.0V TP26 : Over 1.7V Check TP16(C1133) at U1102 WTR1625L is OK Check OVER -3dBm Change the Board LGE Internal Use Only - 21 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 22 TP21,22 : Over 3.0V TP23 : Over 1.7V Check TP12(L1308) at U1300 WTR1625L is OK Check OVER -3dBm Change the Board LGE Internal Use Only - 22 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 23 TP21,22 : Over 3.0V TP23 : Over 1.7V Check TP15(L1325) at U1300 WTR1625L is OK Check OVER -3dBm Change the Board LGE Internal Use Only - 23 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 24 TP21,22 : Over 3.0V TP23 : Over 1.7V Check TP14(L1322) at U1300 WTR1625L is OK Check OVER -3dBm Change the Board LGE Internal Use Only - 24 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 25: Checking Rf Tx Level (Cont.)
3. TROUBLE SHOOTING 3.5 Checking RF Tx Level (Cont.) <TOP> <BOT> LGE Internal Use Only - 25 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 26 Coupling GND1 GND6 GND2 GND5 GND3 GND4 GND1 GND6 GND2 GND5 GND3 GND4 COMMON Termination_Port GND2 GND1 Coupling LGE Internal Use Only - 26 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 27 Check TP5 FEMid is OK Check Over 21dBm Check TP6,7 Coupler is OK Check OVER 21dBm Change the Board LGE Internal Use Only - 27 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 28: Checking Rf Prx Level
(LTE B1,B3,B11,B26 / WCDMA B1,B5 / CDMA BC0,BC6 / GSM Quad) TP14 TP15 TP11 TP10 TP12 TP13 TP16 LGE Internal Use Only - 28 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 29 GND3 GND7 GND4 TP11 TP14 TP16 COMMON TP15 Termination_Port GND2 GND1 Coupling GND1 GND6 GND2 GND5 GND3 GND4 LGE Internal Use Only - 29 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 30 Signal Exist? Check TP6,7,8,9,10,11 FEMid is OK Signal Exist? Check TP12,15 Coupler is OK Signal Exist? Replace Main B’d LGE Internal Use Only - 30 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 31: Checking Rf Drx Level
3. TROUBLE SHOOTING 3.7 Checking RF DRx Level (LTE B1,B3,B11,B26 / WCDMA B1,B5 / CDMA BC0,BC6) TP10 LGE Internal Use Only - 31 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 32 G1 G2 G3 G1 G2 +2V75_VREG_L14 TP10 GND1 HI-BAND G1 G2 G3 COMMON COMMOM GND3 GND2 LO-BAND G1 G2 G3 LGE Internal Use Only - 32 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 33 GPS LNA&Diplexer Check TP9 Module(U1103) is OK. Signal Exist? Check TP10,11 Diplexer is OK. Signal Exist? Replace Main B’d LGE Internal Use Only - 33 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 34: Gps/Wifi/Bt Module
The WTR1605L is integrated GPS solution. ANT1103 SW1103 ANT1102 U1103 Reference Description U1103 GPS LNA SW1103 RF SWITCH ANT1102 / ANT1103 ANTENNA CONTACT LGE Internal Use Only - 34 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 35 ANT5100 / ANT5101 Antenna Contact(Feeding) FL5100 2.4Ghz / 5Ghz Separator FL5101 SAW Filter U5102 5Ghz PAM U5100 Wi-Fi/BT Chip LGE Internal Use Only - 35 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 36: Gps/Wifi/Bt Signal Path
SW1103 U1103 3.9.2WIFI,BT Signal Path 5Ghz RX 5Ghz TX U5100 U5102 2.4Ghz T/RX FL5101 2.4Ghz/5Ghz T/RX FL5100 ANT5101 LGE Internal Use Only - 36 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 37: Checking Gps/Wifi/Bt
Check PMIC(U4100) +2.75V Change the GPS IC(U1103) Change Main Board Check if GPS works well GPS will work properly LGE Internal Use Only - 37 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 38 ANT1103 SW1103 ANT1102 U1103 TP1(C1137) ANT1102 COMMON FEED ANT1103 FEED TP1(C1137) +2V75_VREG_L14 GND3 CELL GND1 GND2 GNSS_A GNSS_B LGE Internal Use Only - 38 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 39 FL5100, FL5101 and around them. Check if TP1 TP2 TP4=1.3V, Check PMIC(U4100) TP3=3V, TP5=+VPWR Change the Main Board LGE Internal Use Only - 39 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 40 FL5101 ANT5101 FL5100 Antenna Contact ANT5101 GND3 GND1 FEED GND2 ANT5100 FEED FL5100 FL5101 GND3 GND1 GND2 FL5100 LGE Internal Use Only - 40 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 41 3. TROUBLE SHOOTING U5102 GND1 GND4 VCC3 GND2 VCC2 VCC1 VMODE VDD_WL_LO U5100 +1V3_VREG_L24 VDD_WL_LO LGE Internal Use Only - 41 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 42 3. TROUBLE SHOOTING +1V8_VREG_L6 +1V8_VREG_L10 +1V3_VREG_L24 +1V3_VREG_L24 +3V0_VREG_L16 U5100 +1V3_VREG_L24 VDD_WL_LO +1V3_VREG_L24 +3V0_VREG_L16 LGE Internal Use Only - 42 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 43: Checking Nfc
Check TP 2 PM8926 check Bias Range 1.65~1.8V Check TP 3 PM8926 check 19.2Mhz Signal exists Change the Board LGE Internal Use Only - 43 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 46: Sim
Clock Line (C9511) MSM8926 (U2100) Data Line (C9512) or Main BD Change Change Main BD SIM Card OK? LGE Internal Use Only - 46 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 47 3. TROUBLE SHOOTING 3. 12. 2 USIM <Bot> USIM_VCC +2V95_VREG_L22 UIM1_RESET_N UIM1_CLK LGE Internal Use Only - 47 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 48: Side Key
Up : KEYPAD_SENSE_2(VA9712) TP2 When press S/W Is it Low ? Check the MSM 8926(U2100) or Main BD LGE Internal Use Only - 48 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 50: Usb
+5V0_VREG_BHARGER (C4143) PM8926 (U4100) Over 4.35V? Check the FL9203 Is USB DM(TP4)/DP(TP5) Triggered? Check Change main BD. USB Connection LGE Internal Use Only - 50 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 52 3. TROUBLE SHOOTING VBUS_USB_IN GND1 GND2 D2_2 7 D2_1 VBUS_USB_IN +5V0_VREG_BHARGER +5V0_VREG_BHARGER +VPWR VBAT VBAT_SENSE +VPWR VCOIN +5V0_VREG_BHARGER +1V35_VSW_S3 LGE Internal Use Only - 52 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 53: Gyro Sensor / Accelerometer Sensor
+1V8_VREG_LVS1(C8103) PM8926 (U4100) for Check GYRO_INT (TP8100) Check SENSOR0_I2C_SDA(R2207) MSM8926 (U2100) SENSOR0_I2C_SCL(R2208) or Main BD Change Main BD LGE Internal Use Only - 53 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 54 3. TROUBLE SHOOTING 3. 15. 2 Gyro Sensor / Accelerometer sensor <Bot> U8100 <Top> LGE Internal Use Only - 54 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 55 3. TROUBLE SHOOTING +1V8_VREG_LVS1 FSYNC REGOUT SDO/AD0 +1V8_VREG_LVS1 VDDIO U8100 AUX_CL +1V8_VREG_LVS1 +1V8_VREG_L6 +1V8_LCDTOUCH_IO Rev.B +1V8_8M_VDDIO +1V8_VREG_L27 LGE Internal Use Only - 55 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 56: Compass Sensor
PM8926 (U4100) +2V85_VREG_L19(C8200) TP1, TP2 Check COMPASS_INT (TP8200) Check SENSOR0_I2C_SDA(R2207) MSM8926 (U2100) SENSOR0_I2C_SCL(R2208) or Main BD Change Main BD LGE Internal Use Only - 56 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 58 3. TROUBLE SHOOTING U8200 TEST1 +2V85_VREG_L19 AVDD TEST0 +1V8_VREG_LVS1 +1V8_VREG_LVS1 +1V8_VREG_L6 +1V8_LCDTOUCH_IO Rev.B +1V8_8M_VDDIO +1V8_VREG_L27 LGE Internal Use Only - 58 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 59: Proximity/Ambient Light Sensor
PM8926 (U4100) +2V85_VREG_L19(C8401) TP1, TP2 Check PROXIMITY_INT (D8401) Check SENSOR0_I2C_SDA(R2207) MSM8926 (U2100) SENSOR0_I2C_SCL(R2208) or Main BD Change Main BD LGE Internal Use Only - 59 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 60 3. TROUBLE SHOOTING 3. 17. 2 Proximity/Ambient Light Sensor <Top> <Top> U8400 <Top> LGE Internal Use Only - 60 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 61 3. TROUBLE SHOOTING +2V85_VREG_L19 SENSOR0_I2C_SDA U8400 PROXIMITY_INT SENSOR0_I2C_SCL +1V8_VREG_LVS1 LEDK LEDA +1V8_VREG_LVS1 +1V8_VREG_L6 +1V8_LCDTOUCH_IO Rev.B +1V8_8M_VDDIO +1V8_VREG_L27 LGE Internal Use Only - 61 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 62: Camera
The Camera Clock Check the MAIN_CAM0_MCLK (C7315) MSM 8926 or main BD. Check MIPI Line (FL7300~FL7302) Change the camera module LGE Internal Use Only - 62 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 64 3. TROUBLE SHOOTING +1V8_8M_VCM +2V8_OIS_DIG FL7300 +2V8_OIS_ANA +1V8_8M_VDDIO VOUT1 +2V8_OIS_ANA VOUT1 VOUT2 +2V8_OIS_DIG VOUT2 +1V2_VREG_L26 +1V8_8M_VDDIO FL7301 LGE Internal Use Only - 64 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 65 The Camera Clock Check the VT_CAM_MCLK (C7403) MSM 8926 or main BD. Check MIPI Line (FL7400) Change the camera module LGE Internal Use Only - 65 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 67 3. TROUBLE SHOOTING +1V8_VREG_L27 +2V8_VREG_L15 +1V2_VREG_L5 +1V8_8M_VDDIO FL7400 LGE Internal Use Only - 67 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 68: Lcd
Check LCD connector Reconnect CN16001 (CN16001) Check Check U4100 (PM8926) +3V1_VREG_L28 (C16000) Check U7303 (LDO) +1V8_LCDTOUCH_IO (C16002) Check LCD Module LGE Internal Use Only - 68 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 69 3. TROUBLE SHOOTING +1V8_LCDTOUCH_IO +1V8_LCDTOUCH_IO +3V1_VREG_L28 PMIC_LED_C PMIC_LED_A +5V5_DDVDH +1V8_LCDTOUCH_IO -5V5_DDVDL LGE Internal Use Only - 69 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 71: Touch Trouble Shooting
Check U4100 (PM8926) +1V8_LCDTOUCH_IO(C16002) Check U7303 (LDO) Check I2C Line Check U2100 (MSM8926) (ZD16005, ZD16006) Change Touch Module LGE Internal Use Only - 71 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 72 3. TROUBLE SHOOTING +1V8_LCDTOUCH_IO +1V8_LCDTOUCH_IO +3V1_VREG_L28 PMIC_LED_C PMIC_LED_A +5V5_DDVDH +1V8_LCDTOUCH_IO -5V5_DDVDL LGE Internal Use Only - 72 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 74: Vibrator Troubleshooting
Check out the setting menu on the phone. If not, check Test points shown on the pictures. Start Check U4100 (PM8926) Check PMIC_VIB_N Check L9910 Check +VPWR Check L9911 Check MOTOR Connector Check MOTOR LGE Internal Use Only - 74 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 76: Audio
Check Speaker Module Check Speaker Contact Check L6916 , L6917 Check Check L6914 , L6915 Check Check U6100 (WCD9302) LGE Internal Use Only - 76 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 78 WCD9302 -> EARO_P/EARO_N -> Receiver Start Check Receiver Module Check Receiver Contact Check L6912 , L6913 Check Check U6100 (WCD9302) LGE Internal Use Only - 78 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 80 Check MIC Bias (VA6917 or C6923) Check MIC6912 Check U6100 (WCD9302) (Main MIC) Check FB6917 Check MIC_IN1_P Check U6100 (WCD9302) LGE Internal Use Only - 80 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 82 Check MIC Bias (VA6922 or C6929) Check MIC6913 Check U6100 (WCD9302) (SUB MIC) Check FB6918 Check MIC_IN3_P Check U6100 (WCD9302) LGE Internal Use Only - 82 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 84 Check MIC_BIAS_2 signal (R6922) Check J6912 Check U6100 (WCD9302) (EAR_MIC) Check U6912 Check EAR_MIC_JACK signal Check U6100 (WCD9302) LGE Internal Use Only - 84 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 86: Download
TOOL INFORMATION TOOL VERSION DLL NAME USB DRIVER Please Check the Version to “B2B” Name Part No. D/L Cable LGE Internal Use Only - 86 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 97 4. DOWNLOAD LGL25 LGL25_20140617_LGFLASHv160_Download LGL25_20140617_LGFLASHv160_Download LGL25 LGL25AT-00-V10a-SSV-XXX-JUN-03-2013+0.tot LGL25 LGE Internal Use Only - 97 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 98 4. DOWNLOAD LGL25 LGL25_20140617_LGFLASHv160_Download LGL25 LGL23AT-00-V10a-SSV-XXX-JUN-03-2013+0.tot LGL25 LGL25 LGE Internal Use Only - 98 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 102: Block Diagram
5. BLOCK DIAGRAM 5. BLOCK DIAGRAM [L25] Total Block Diagram LGE Internal Use Only - 102 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 103: Rf Block Diagram
VDD_DIO (BC0) DRX GNSS_RF_INN L9_+2.05V VDD_RF2_ PM8926 PM8926 L1 +1 225V L1_+1.225V VDD_RF1_ DRX_MB1_IN WTR0_XO_IN B26(5),BC0 XO_IN DRX_LB2_IN LGE Internal Use Only - 103 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 104 5GHZ_RX WL_BB_QN WLAN_BB_QM WLAN_WCSS_XO CLK_OUT WCN_XO VPWR L6_1.8V VDD_IO_1P8 L10_1.8V VDD_XO_1P8 PM8926 L24_1.3V VDD_BT_WL_1P3 L16_3.3V VDD_BT_WL_PA_3P3 X-tal 48Mhz LGE Internal Use Only - 104 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 105 NFC_CLK_REQ CLK_REQ GPIO_3 BB_CLK2 +3V0_USIM1_NFC (Option) USIM SIMVCC NFC_SWP X-tal SWIO_UICC CLK1 NFC CLK O NFC_CLK_O 27.12Mhz (option) LGE Internal Use Only - 105 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 106 Accel / Gyro VDD / VDDIO / NCS PMUVCC PN547 DVDD PVDD COMPASS (NFC) AVDD VBAT /VBAT_DCDC +VPWR Proximity/Ambient LGE Internal Use Only - 106 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 107 GPIO_113 VLED_FLASH VT_CAM_MCLK AVDD FLASH_LED_OUT LCD_IO_EN +2V8_VREG_15 GPIO_28 VT_CAM_RESET_N VDDIO GPIO_2 CAM1_I2C_SDA GPIO_3 CAM1_I2C_SCL VREG_L27 VREG_L15 VREG_L5 VREG_L26 LGE Internal Use Only - 107 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 108 UIM1_DATA UIM1_DATA +2V95_VREG_L17 +1V8_VREG_L6 NFC_SWP VREG_L6 VREG_L17 (1.8V, 600mA) (2.95V, 600mA) SWIO_UICC EXT SW CTRL EXT_SW_CTRL PM8926 PN547 LGE Internal Use Only - 108 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 111: Circuit Diagram
B26 DRX 876.5MHz G1 G2 B1 DRX +2V75_VREG_L14 2140MHz C1164 Path VCTL PORT1 - B1_DRX PORT2 - B11_DRX - 111 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 112 +1V8_VREG_L6 or +1V8_VREG_L10 RFFE1_CLK SCLK LM3263 SVDD RFFE1_DATA SDATA PGND L1400 1.5u +VPA0 C1402 4/30 THMC CAP À¸·Î º¯°æ - 112 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 113 GND55 GND59 GND56 GND60 GND57 GND61 GND62 GND63 < GND Contact Pin> SMT Shield CAN SC1500 DNI Àû¿ë - 113 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 114 0 ohm JTAG_TDO JTAG_TDI JTAG_TMS JTAG_TRST JTAG_PS_HOLD JTAG_SRST DNI_ENBY0053201 24-5804-014-000-829+ 5/26 C2109 add Rev.1.0 JTAG CON : DNI - 114 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 115 Main CAM R2213 2.2K CAM0_I2C_SDA +1V8_8M_VDDIO R2214 2.2K CAM0_I2C_SCL VT CAM R2219 2.2K +1V8_VREG_L27 CAM1_I2C_SDA R2220 2.2K CAM1_I2C_SCL - 115 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 116 VDD_APC_15 VDD_APC_16 VDD_APC_17 VDD_APC_18 VDD_APC_19 VDD_APC_20 VDD_APC_21 VDD_APC_22 VDD_APC_23 VDD_APC_24 VDD_APC_25 VDD_APC_26 VDD_APC_27 VDD_APC_28 VDD_APC_29 VDD_APC_30 VDD_APC_31 VDD_APC_32 - 116 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 117 GND_339 GND_166 AW30 GND_340 GND_167 AW38 GND_341 GND_168 AW40 GND_342 GND_169 GND_343 GND_170 GND_344 GND_171 AY29 RSVD GND_172 - 117 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 118 NC22 NC113 NC73 NC114 NC24 NC115 NC25 NC117 NC26 NC118 NC27 NC120 NC28 NC121 NC29 NC122 NC30 NC123 - 118 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 119 BAT_ID R9113 TOL=0.01 VA9103 Note 6 Rev. 0.4 : PA Thermistor Pull up R4115 100K +1V8_VREG_L12 PA_THERM_0 TOL=0.01 - 119 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 120 2000mA 1200mA <9-8-3_Flash_LED> 1200mA 1200mA Rev_0.3 300mA 300mA FLASH_LED_OUT_P 600mA LD9830 ZD9830 150mA 50mA EAV62175401 EAT62053101 600mA 50mA - 120 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 121 +VPWR_BOOST_BYPASS_RF For TMUS C5149 C5150 C5151 C5152 GND25 100p GND26 +VPWR Others GND27 +3V0_VREG_L16 GND28 P11&P73 P73 P73 - 121 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 122: Nfc Antenna
Use the port specified by the operator Delete with resistor component(DNI or 0ohm) +VPWR_BOOST_BYPASS_RF For TMUS +VPWR Others - 122 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 123 50pF value for ESD protection with d-class amp LAYER_ALIGN DLA_1 DLA_1 DLA_2 DLA_7 DLA_2 DLA_7 DLA_3 DLA_6 DLA_3 DLA_6 DLA_4 DLA_5 DLA_4 DLA_5 - 123 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 124 MC-C06162-1 : 1. Don't connect Positive of Tantal, TVS diode to Negative voltage if use 2. We recommend MLCC capacitor in this case - 124 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 125 2. Placement of Oder : Keypad - Capacitor(Varistor, TVS Diode) - Resistor MC-C00069-11 : Key ESD protection on each signal applied DNI Pad - 125 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 126 SHIELD CAN CLIP SC20001 SC20003 SC20005 SC20006 SC20008 SC20010 SC20015 SC10003 SC10006 SC10007 SC10009 SC10011 Rev.B Rev.B Rev.B - 126 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 127 KEYPAD_SENSE_1 ANT102 C-clip pad·Î ¿¬°á¿¹Á¤ (DGMS Guide) MC-C00069-11 : Key ESD protection on each signal applied DNI Pad - 127 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 128: Bga Pin Map
7. BGA PIN MAP 7. BGA PIN MAP U5100- WCN3660A ,BT / Wi-Fimodule <TOP View> NOT IN USE LGE Internal Use Only - 127 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 129 ODT Will be connected to rank 0. The ODT Input to Rank 1(If 2nd rank is present) will bl connected to Ground in the package. LGE Internal Use Only - 128 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 130 7. BGA PIN MAP U2100-MSM8926(Top View)– Lower Left quadrant NOT IN USE LGE Internal Use Only LGE Internal Use Only - 129 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 131 7. BGA PIN MAP U2100-MSM8926(Top View)– Lower Left quadrant NOT IN USE LGE Internal Use Only LGE Internal Use Only - 130 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 132 7. BGA PIN MAP U2100-MSM8926(Top View)- Upper Right quadrant NOT IN USE LGE Internal Use Only LGE Internal Use Only - 131 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 133 7. BGA PIN MAP U2100-MSM8926(Top View)- Upper Left quadrant NOT IN USE LGE Internal Use Only - 132 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 134 VccQ VssQ DAT5 DAT6 DAT7 VssQ NC : No Connect, Shall be connected to ground or left floating. LGE Internal Use Only - 133 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 135 7. BGA PIN MAP U1400 –LM3263 ,IC, DC,DC Converter (Top View) <Top View> NOT IN USE LGE Internal Use Only LGE Internal Use Only - 134 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 136 7. BGA PIN MAP U4100–PM8926 , PMIC(Top View) LGE Internal Use Only - 135 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 137 7. BGA PIN MAP U1500 – WTR1625L (Top View)Lower Left quadrant NOT IN USE LGE Internal Use Only - 136 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 138 7. BGA PIN MAP U1500 – WTR1625L (Top View)Lower Right quadrant NOT IN USE LGE Internal Use Only - 137 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 139 7. BGA PIN MAP U1500 – WTR1625L (Top View)Upper Left quadrant NOT IN USE LGE Internal Use Only - 138 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 140 7. BGA PIN MAP U1500–WTR1625L (Top Viw)Upper Right quadrant NOT IN USE LGE Internal Use Only - 139 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 142: Bottom View
7. BGA PIN MAP U7500 – TPS65132 , DSV <Bottom View> LGE Internal Use Only - 141 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 143: Pcb Layout
U1300 : SKY77629-21 No Power-On , Charging , etc. No RF Power ANT1 : Home-Key No Home-Key operation LGL25_MAIN_EAX65885501_1.0_TOP - 142 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 144 CN9200 : USB IO : B1 / B3 / B26 QUAD GSM No USB operation ANT1 Contact LGL25_MAIN_EAX65885501_1.0_BOT - 143 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 149: Calibration
RAD32247878 I/O Cable RF Cable_Main Power Supply_PIF Power Supply 5.3V RF Test Equipment NOTICE CMW500 RF Cable connection LGE Internal Use Only - 148 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 151 9. CALIBRATION LGL25 MS695 [TachyonV48] LGL25 20140723 ALL File Calibration [Tachyon36]LGMS695_20120213_Calibration LGL25 LGE Internal Use Only - 150 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 154 9. CALIBRATION LGL25 LGL25 LGL25 LGL25 LGL25 LGL25 LGL25 LGL25 LGE Internal Use Only - 153 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 156 RAD32167861 RF cable : MS-156C (P/No :MXFJK1WT4000C2) This is for example. You can check “C:\LGE\Tachyon\Model\L25\Setting Guide” LGE Internal Use Only - 155 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 157 MS-156C MXFJK1WT4000C2 GPIB cable (IEEE-488) (P/No : BJAY0020058) RAD32167861 This is for example. You can check “C:\LGE\Tachyon\Model\L25\Setting Guide” LGE Internal Use Only - 156 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 168: Hidden Menu
-> All Auto Test - Full menu click Auto Detecting Item -> USIM1 Card SD Card Ear Phone wrong TA wrong Battery Battery ID LGE Internal Use Only - 167 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 169 Key Press Test -> Check Key Press, Proximity sensor Camera(Main)Test -> Main Camera Test Preview and Result Camcorder Test LGE Internal Use Only - 168 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 170: Vibrator Test
10. HIDDEN MENU Display Check Test -> Touch ‘Pass’ -> Check Change the White color Ring test Vibrator test LGE Internal Use Only - 169 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 171 Touch window test -> Write with finger Motion Sensor Test -> Check Magnetic, Accelerometer, Gyroscope Sensor GPS BT WIFI Test LGE Internal Use Only - 170 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 172 10. HIDDEN MENU NFC Test Loopback Test : Audio Camera OIS Test LGE Internal Use Only - 171 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 173: Disassemble Guide
2) Unhook in the inside of Cover rear using a wide spatula. Unhook 3)Unhook along to the direction S t art P oint * Unhook direction LGE Internal Use Only - 172 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 174 1. Disconnect Front Camera Connector 2. Disconnect LCD FPCB Connector 3.Unhook the PCB hook 3)Pull in main PCB LGE Internal Use Only - 173 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 175 At First : take off FPCB At Second : disassemble the Bracket Homekey (ABA75449001) 2) Disassemble the Homekey disassemble The Home-key (ABH75439601) LGE Internal Use Only - 174 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 176 Antenna Unhook 2point 2)Disassemble Main Antenna (EAB63748301) Disassemble at First the right hook, and next second left hook LGE Internal Use Only - 175 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 177 11. DISASSEMBLE GUIDE 5. COMPLETE DISASSEMBLING LG-L25 * DISASSEMBLE LG-L25 LGE Internal Use Only - 176 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 178: Exploded View & Replacement Part List
12. EXPLODED VIEW & REPLACEMENT PART LIST LGE Internal Use Only - 179 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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L25

LG -L25 Service Manual

Introduction

Performance

Trouble Shooting

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Block Diagram

Circuit Diagram

Bga Pin Map

Pcb Layout

Calibration

Hidden Menu

Disassemble Guide

Exploded View & Replacement Part List

Quick Links

Troubleshooting

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