Page 1 Internal Use Only Service Manual LG-D405 Date: March, 2014 / Issue 0.9...
Page 2: Table Of Contents
3.16 Proximity Sensor troubleshooting..........105 3.17 Power ON Troubleshooting ............107 3.18 FM Trouble Shooting ...............111 3.19 USB Trouble Shooting ..............116 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...
Page 5: Performance
2.1 Product Name LG- D410 : WCDMA900/1900/2100+EGSM/GSM850/DCS1800/PCS1900(HSPA + / GPRS Class 12 / EDGE Class 12) LG- D405 : WCDMA900/1900/2100+EGSM/GSM850/DCS1800/PCS1900(HSPA + / GPRS Class 12 / EDGE Class 12) LG- D410 : WCDMA900/1900/2100+EGSM/GSM850/DCS1800/PCS1900(HSPA + / GPRS Class 12 / EDGE Class 12) 2.2 Supporting Standard...
Page 6: Hw Features
Display Main LCD(qHD) TFT Main LCD(4. 7”,960 x 540) Built-in Camera 8M AF / VGA VT Status Indicator LGE Internal Use Only - 6 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 7 Speaker Phone mode Support Travel Adapter In-box item CDROM Stereo Headset In-box item Data Cable In-box item T-Flash(External Memory) LGE Internal Use Only - 7 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 8 Under 400 mA @ Max Power Avg. Talk current @GSM Level 5 Under 400 mA @ Tx10dBm Avg. LGE Internal Use Only - 8 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 9: Sw Features
Search by Number/Name Group Fixed Dial Number Service Dial Number Own Number Voice Memo Call Reminder Network Selection Automatic LGE Internal Use Only - 9 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 10 Download Melody / Over web browser or Google Play Wallpaper SIM Lock SIM Toolkit Class 1,2,3,C,E EONS CPHS LGE Internal Use Only - 10 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 11 Class 12 Hold / Retrieve Conference Call Max. 7 DTMF Memo pad Both NB and WB SyncML Hangouts Email LGE Internal Use Only - 11 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 12: Hw Spec
: -98dBm/-96dBm (2.439%) AM Suppression GSM : -31dBm -98dBm/-96dBm (2.439%) DCS : -29dBm Timing Advance ± 0.5T LGE Internal Use Only - 12 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 13 < 17.5 %, when Pout ≥ -20 dBm < -15 dB at Pout  -20 dBm Peak Code Domain Error LGE Internal Use Only - 13 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 14 +1.5/4 Inner Loop Power Control -0.5/+0.5 -0.5/+0.5 -0.5/+0.5 In Uplink -0.5/-1.5 -1/-3 -1.5/-4 group(10equal command group) +8/+12 +16/+24 LGE Internal Use Only - 14 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 15 Power Ratio (ACLR) > 43 dB @ ±10 MHz Error Vector Magnitude < 17.5 %, when Pout ≥ -20 dBm LGE Internal Use Only - 15 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 16 Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0 (BLER or R), 16QAM Only BLER < 10% or R >= 700kbps LGE Internal Use Only - 16 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 17 ≥ 35dB @FER ≤ 8%, Rx Adjacent Channel interference input signal -70dBm@fc±30MHz(2Mbps DQPSK) Rejection interference input signal -70dBm@fc±25MHz(11Mbps CCK) LGE Internal Use Only - 17 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 18 ※ACR shall be measured by setting the desired signal's strength 3 dB above the rate-dependent sensitivity specified in min input sensitivity LGE Internal Use Only - 18 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 19 ※ACR shall be measured by setting the desired signal's strength 3 dB above the rate-dependent sensitivity specified in min input sensitivity LGE Internal Use Only - 19 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 20 21 -104±2 -103±2 CPIPH Level=-3.3 21 -104±2 -103±2 10 -110±2 -105±2 10 -110±2 -105±2 LGE Internal Use Only - 20 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 21: Trouble Shooting
3. TROUBLE SHOOTING 3. TROUBLE SHOOTING 3.1 RF Component FL1602 U1100 U1601 U1602 FL1100 FL1101 FL1600 FL1603 U1500
LGE Internal Use Only - 21 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 22 WCDMA B1 Duplexer FL1601 WCDMA B5 Duplexer FL1602 WCDMA B2 Duplexer FL1603 WCDMA B1 TX SAW SW101 MOBILE S/W LGE Internal Use Only - 22 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 23: Signal Path
WCDMA B1, B8 and B2 TX Signal PATH 1. WCDMA B1 TX PATH 2. WCDMA B8 TX PATH 3. WCDMA B2 TX PATH LGE Internal Use Only - 23 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 24 WCDMA B1, B2 and B8 RX Signal PATH 1. WCDMA B1 RX PATH 2. WCDMA B8 RX PATH 3. WCDMA B2 RX PATH LGE Internal Use Only - 24 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 25 1. GSM900 RX PATH 2. GSM850 RX PATH 3. GSM1900 RX PATH 4. GSM1800 RX PATH 5.GSM COMMON TX PATH LGE Internal Use Only - 25 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 26: Checking Xo Block
The output frequency (19.2MHz) of XO (X4100) is used as the reference one of WTR2605 and PM8226 internal VCO.

LGE Internal Use Only - 26 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 27 1.9V ≥ VREG_XO ≥ 1.7V Check PM8226 Check TP2 (19.2 MHz) Check soldering and 19.2 MHz Signal components XO OK LGE Internal Use Only - 27 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 28: Checking Femid (Gsm, W B1/B2/B8) Block
3. TROUBLE SHOOTING 3.4 Checking FEMID (GSM, W B1/B2/B8) Block TP3 TP4
LGE Internal Use Only - 28 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 29 Check TP1~7 (High Level) 1.4V < Voltage < 3.0V Check the TP8,9 Check the ANT Logic in each mode LGE Internal Use Only - 29 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 30 TRX1 W B1/B4 TRX TRX2 W B2 TRX TRX3 G900/850 RX WB5/B8 TRX4 TRX,G850/900 G1900 RX G1800 RX LGE Internal Use Only - 30 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 31: Checking Wcdma Block
Check XO Block Refer to 3.3 Check FEMID Block Refer to 3.4 Check RF TRX Level Re-download & Cal LGE Internal Use Only - 31 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 32 Refer to 3.3 3.5.2 Checking FEMID Block Refer to 3.4 3.5.3 Checking RF TX Level {WCDMA B1}
LGE Internal Use Only - 32 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 33 100p C1107 100p C1108 100p WTR_PRX_LB_2_IN FL1101 881.5MHz SWAP the RX Filter G850 EAM62732801 G900 EAM62732901
LGE Internal Use Only - 33 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 34 Over 21 dBm? Check TP2 Check FL1600 Over 21 dBm? Check TP3 Check PAM Over ‐3dBm? Check WTR2605 LGE Internal Use Only - 34 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 35 C1676 100p C1672 100p RFOUT RFIN VCC2 VCC1 PGND SKY77761 U1600 C1673 C1613 C1614 C1617 C1618 1.5n DRBFM LGE Internal Use Only - 35 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 36 3. TROUBLE SHOOTING PA LOGIC B1/B4 POWER MODE PA0_ON_1 PA0_R0 PA0_R1 SHUT DOWN STAND-BY HP MODE MP MODE LP MODE LGE Internal Use Only - 36 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 37 L1140 C1106 100p C1107 100p C1108 100p WTR_PRX_LB_2_IN FL1101 881.5MHz SWAP the RX Filter G850 EAM62732801 G900 EAM62732901 LGE Internal Use Only - 37 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 38 GND5 RFIN U1602 PA0_ON_0 C1641 100p C1642 100p VENHB SKY77742-21 PA0_ON_2 GND4 VENLB PA0_R_0 EAN62885901 RFOUTLB VMODE WTR_PDET_IN LGE Internal Use Only - 38 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 40 Over 21 dBm? Check TP2 Check FL1601 Over 21 dBm? Check TP3 Check PAM Over ‐3dBm? Check WTR2605 LGE Internal Use Only - 40 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 41 PA0_ON_0 (C1647) : PAM Enable & Band Select PA0_ON_2 (C1648) : PAM Enable & Band Select PA0_R_0 (C1648) : Gain Control
LGE Internal Use Only - 41 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 42 PA LOGIC B2/B5 POWER MODE PA_ON_0 PA_ON_2 PA0_R0 SHUT DOWN STAND-BY B1/B2 HPM B1/B2 LPM B5/B8 HPM B5/B8 LPM LGE Internal Use Only - 42 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 43 L1140 C1106 100p C1107 100p C1108 100p WTR_PRX_LB_2_IN FL1101 881.5MHz SWAP the RX Filter G850 EAM62732801 G900 EAM62732901 LGE Internal Use Only - 43 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 44 RFIN WTR_TX3_OUT U1602 PA0_ON_0 C1641 100p C1642 100p VENHB SKY77742-21 PA0_ON_2 GND4 VENLB PA0_R_0 EAN62885901 RFOUTLB VMODE WTR_PDET_IN LGE Internal Use Only - 44 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 46 Over 21 dBm? Check TP2 Check FL1602 Over 21 dBm? Check TP3 Check PAM Over ‐3dBm? Check WTR2605 LGE Internal Use Only - 46 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 47 PA0_ON_0 (C1647) : PAM Enable & Band Select PA0_ON_2 (C1648) : Gain Control PA0_R_0 (C1648) : Gain Control
LGE Internal Use Only - 47 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 48 PA LOGIC B2/B5 POWER MODE PA_ON_0 PA_ON_2 PA0_R0 SHUT DOWN STAND-BY B1/B2 HPM B1/B2 LPM B5/B8 HPM B5/B8 LPM LGE Internal Use Only - 48 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 49 L1140 C1106 100p C1107 100p C1108 100p WTR_PRX_LB_2_IN FL1101 881.5MHz SWAP the RX Filter G850 EAM62732801 G900 EAM62732901 LGE Internal Use Only - 49 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 50
+VPA0 B1, B4 FL1600 EAM62711201 L1621 2.2n TX_MODULE_TRX_1 LNA_PRX_MB1_IN L1616 GND1 GND6 GND2 GND5 GND3 GND4 C1613 LGE Internal Use Only - 50 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 51 Check RF Switch (M/S) Check TP1 Signal exist ? Check TP2 Signal exist ? Check FL1600 Check WTR2605 LGE Internal Use Only - 51 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 52 L1140 C1106 100p C1107 100p C1108 100p WTR_PRX_LB_2_IN FL1101 881.5MHz SWAP the RX Filter G850 EAM62732801 G900 EAM62732901 LGE Internal Use Only - 52 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 53 WTR_PRX_LB_1_IN L1626 4.7n GND1 GND6 GND2 GND5 GND3 GND4 Shunt cap must be<=33pF guarantee LNA gain setting time LGE Internal Use Only - 53 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 54 Check RF Switch (M/S) Check TP1 Signal exist ? Check TP2 Signal exist ? Check FL1601 Check WTR2605 LGE Internal Use Only - 54 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 55 L1140 C1106 100p C1107 100p C1108 100p WTR_PRX_LB_2_IN FL1101 881.5MHz SWAP the RX Filter G850 EAM62732801 G900 EAM62732901 LGE Internal Use Only - 55 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 56 WTR_PRX_LB_1_IN L1626 4.7n GND1 GND6 GND2 GND5 GND3 GND4 Shunt cap must be<=33pF guarantee LNA gain setting time LGE Internal Use Only - 56 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 57 Check RF Switch (M/S) Check TP1 Signal exist ? Check TP2 Signal exist ? Check FL1602 Check WTR2605 LGE Internal Use Only - 57 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 58: Checking Gsm Block
Check XO Block Refer to 3.3 Check FEMID Block Refer to 3.4 Check RF TRX Level Re-download & Cal LGE Internal Use Only - 58 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 59 W7 CI (06/07) SPDT_SEL PA0_R_1 C1145 3.9p WTR_TX1_OUT PA0_R_0 ANT0_SW_SEL_0 ANT0_SW_SEL_3 ANT0_SW_SEL_1 ANT0_SW_SEL_2 Schematic of GSM(850/900)/DCS/PCS Tx Block LGE Internal Use Only - 59 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 61 Check TP2, 3 If GSM(TP2) under 6 dBm ? Check Tx Module If DCS/PCS(TP2) under 6 dBm ? Check WTR2605 LGE Internal Use Only - 61 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 62 L1140 C1106 100p C1107 100p C1108 100p WTR_PRX_LB_2_IN FL1101 881.5MHz SWAP the RX Filter G850 EAM62732801 G900 EAM62732901 LGE Internal Use Only - 62 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 63 GND3 GND5 GND2 RX_G1800 L1138 G1800, G1900 GND6 GND1 RX_G1900 L1139 C1149 100p C1150 100p WTR_PRX_MB_3_IN GSM1900_OUT GSM1800/1900_IN LGE Internal Use Only - 63 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 64 Check TP1 Signal exist ? Check RF Switch (M/S) Check TP2,3,4 Signal exist ? Check Tx Module Check WTR2605 LGE Internal Use Only - 64 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 65: Gps Trouble Shooting
C5206 Reference Description R1401 ANT5202 R1400 CN9100 CN1103 ANTENNA CONTACT ANT2500 FL1105 Saw Filter GPS LNA U1500 WTR2605 LGE Internal Use Only - 65 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 66 C2339 C5210 R1107 C5206 R1401 ANT5202 R1400 CN9100 ANT2500 R1108 L1137 C1163 L1136 GPS Signal SW1100 LGE Internal Use Only - 66 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 67 Check TP1 R11002 is 1.8v Check U4100 L11014 is 2.7v Check TP2 Check X4100 Signal exist? Check WTR2605 LGE Internal Use Only - 67 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 68 L1118 6.3V L1146 8.2n L1147 2.2n C1161 100p WTR_GNSS_RF_IN_1 RFIN RFOUT SFMG2BAD001 L1126 Schematic of GPS LNA Block LGE Internal Use Only - 68 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 69 3. TROUBLE SHOOTING U4100 X4100
R1504 WTR_XO_IN 51 TOL=0.01 option) C1508 100p WTR0_XO_IN LGE Internal Use Only - 69 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 70: Wifi/Bt Trouble Shooting
Connected to antenna Reference Description C-Clip CN5100 Connected to antenna FL5100 Saw Filter U5100 WCN3620 LGE Internal Use Only - 70 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 71 3. TROUBLE SHOOTING 3.8.2 WIFI/BT Signal Path Tx/Rx To opposite side WIFI,BTSignal LGE Internal Use Only - 71 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 72 Power for WCN analog, digital,and RF core circuits. VREG_L24_1V3 Power for WLAN driver amplifier circuits VREG_L16_3V3 Power for WLAN 2.4GHz PA circuits LGE Internal Use Only - 72 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 74 VDD_WL_PLL_1P3 VDD_WL_LO_1P3 C5112 C5113 VDD_WL_2GPA_3P3 C5114 100p VDD_BT_DA_3P3 100p C5116 C5115 100p R5104 R5105 VREG_L16_3V3 Schematic of WCN3620 LGE Internal Use Only - 74 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 75: Audio Trouble
Replace component Fail on TP1 -> replace U6100 U2100 or main board U6100 Fail on TP2 -> replace R6107 LGE Internal Use Only - 75 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 76 CN102 L100 SPK_P L101 SPK_N EAB62653001 Rev.C BRS-181030P08-P BUJEON size change (1005-->1608) Rev 1.0 (06/03) TP3(L101) TP1(L100) TP3(L101) LGE Internal Use Only - 76 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 77 R6107 +VPWR SPKR_DRVM SPK_N TP2(R6107) R6108 +VPWR_BOOST_BYPASS VDD_SPKDRV GND_SPKDRV_1 GND_SPKDRV_2 GND4 RevC)131111-FM TP2(R6107) TP1(FB6100) LGE Internal Use Only - 77 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 78 TP1 to TP2/TP3 to TP4 Short test. Is it OK? Rework component TP1(L6810), TP3(L6811) Works well? Replace component U6100 LGE Internal Use Only - 78 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 79 3. TROUBLE SHOOTING TP1(L6810) CN6810 L6810 RCV_P EAB62888201 L6811 EM-TECH RCV_N TP3(L6811) TP3(L6811) TP1(L6810)
LGE Internal Use Only - 79 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 80 Replace component MIC100on Lower FPCB Check Mic Power in Main Board TP1(MIC_BIAS_1) Replace component U6100 Change Main Board LGE Internal Use Only - 80 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 81 (0603-->1005) MIC100 GOERTEK EAB62830801 FB100 1800 0529 MIC_IN1_P P/N change (01/02) TP2(FB100) VA101 VA100 R100 (06/24) TP1(C100) TP2(FB100) LGE Internal Use Only - 81 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 82 Check Mic Power in Main Board Check Mic signal in Main Board TP1(MIC_BIAS_1) TP2(MIC3_IN_P) Replace component MIC6920 Replace component U6100 LGE Internal Use Only - 82 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 83 MIC_IN3_P for CI &DCR 1.9ohm,value 1800 (06/13) 0620 GND Close to MIC 0603,5.5V,35V,33pF Rev1.0) TP2(FB6920) TP1(C6920)
LGE Internal Use Only - 83 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 84 TP5(-NCP_VNEG), TP6(NPC_C1P) When headset inserted change High REF) -> Low? Replace component U6100 Replace component U6100 Replace component U6420 LGE Internal Use Only - 84 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 85 GND. C6106 0.1u LDO_HI_CAP TP1(R6105) TP3(FB6612) TP4(L6610) TP2(FB6611) TP1(R6105)

LGE Internal Use Only - 85 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 86 U6100 C6103 CCOMP Pin 18(GND) should have WCD9302 a dedicated via to main GND. C6106 0.1u LDO_HI_CAP TP1(R6105) LGE Internal Use Only - 86 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 87 R6424 330K TOL=0.01 1.2K TOL=0.01 R6612 MIC_BIAS_2 R6613 C6615 MIC_IN2_N TP2(C6614, R6616) C6420 TP1(R6105) TP2(C6614) TP2(R6616) LGE Internal Use Only - 87 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 88: Camera
TP3 : 1.8V /TP4 : 2.8V TP5 : 24MHz Change the Camera Module Camera is OK? Change the Main board LGE Internal Use Only - 88 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 89 MAIN_CAM0_MCLK MAIN_CAM_DVDD CAM_AVDD_2V8 CAM_IOVDD_1V8 CAM_VCM_2V8 CAM0_I2C_SDA CAM0_I2C_SCL for W & X commonize (06/03) RevB) for GPS tuning 0603,5.5V,35V,15pF LGE Internal Use Only - 89 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 90 TP2 : 1.2V TP3 : 1.8V TP4 : 24MHz Change the Camera Module Camera is OK? Change the Main board LGE Internal Use Only - 90 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 91 RevC) Sunny-low/ Cowell-high VT_MAKER_ID FL7400 VT_CAM_MIPI_CLK_N VT_CAM_MIPI_CLK_P VT_CAM_MIPI_DATA0_N VT_CAM_MIPI_DATA0_P CN7400 CAM_AVDD_2V8 FRONT_CAM_DVDD CAM_IOVDD_1V8 CAM0_I2C_SDA CAM0_I2C_SCL VT_CAM_PWDN VT_CAM_RESET_N 6.3V LGE Internal Use Only - 91 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 93: Main Lcd Trouble Shooting
Check LCD Power in Main Board module TP3(VREG_L15_2V8) TP1(DDVDL_-5.5V) TP4(VREG_L8_1V8) TP2(DDVDH_+5.5V) TP5(PMIC_LED_A) Replace LCD Module Replace component U9301 Replace component U4100 LGE Internal Use Only - 93 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 94 COMMON_I2C_SDA DDVDL_-5.5V EAN62731801 -OUT_N PGND1 PGND2 CFLY1 4.7u C9307 2.2u AGND CFLY2 C9302 TP1(C9308) TP2(C9303) TP1(C9308)
LGE Internal Use Only - 94 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 95 LCD_RESET_N CABC_WLED LCD_MIPI_DATA0_N VREG_L8_1V8 VREG_L15_2V8 LCD_VSYNC TP8(FL7103) EAG63232601 1005,5.6V,15.5V,100pF TP4(C7102) TP3(C7100) TP6(FL7101) CN7100 TP7(FL7102) TP8(FL7103) TP5(R7101)
LGE Internal Use Only - 95 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 96: Touch Troubleshooting
If device’s other function is normal, then replace U4100 Can you see I2C wave form? @TP5, TP6? Replace U7200 LGE Internal Use Only - 96 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 97 SYNC RX12 NOISE_IN RX11 RX10 TP7202 DBG_CLK TP7203 DBG_DATA TP5(R2205) R2205 3.3K TOUCH_I2C_SDA VREG_L6_1V8 R2206 3.3K TOUCH_I2C_SCL TP6(R2206) LGE Internal Use Only - 97 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 98 3. TROUBLE SHOOTING TP2(C7202) TP1(C7201) TP3(R7200) TP4(R7202) TP5(R2205) TP6(R2206)
LGE Internal Use Only - 98 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 99: Vibrator Trouble Shooting
TP2/TP3 to TP4 Replace Lower FPCB Short test. Is it OK? Rework component TP1(L105), TP3(L106) Works well? Replace Lower FPCB LGE Internal Use Only - 99 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 100 (0603-->1005) VB100 L105 100n +VPWR EAU61805901 WHVM-1030FS 100n L106 WOOSUNG PMIC_VIB_N 01/02 P/N change (07/04) (06/30) Add (Main-->Lower) LGE Internal Use Only - 100 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 101: Gyro/Accel Trouble Shooting
Check main board TP1(R2201), TP2(R2202). TP3(C8101) 2.85V? It’s signal level high? Replace component U2100 Replace component U4100 Replace component U8100 LGE Internal Use Only - 101 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 102 : b'0001_011x 0.1u 0.1u TP1(R2201) R2201 3.3K SENSOR0_I2C_SDA VREG_LVS1_1V8 R2202 3.3K SENSOR0_I2C_SCL TP2(R2202) TP3(R2205) TP1(R2201) TP2(R2202)
LGE Internal Use Only - 102 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 103: Compass Sensor Troubleshooting
BMC150 INT2 GND3 EAN62637201 COMPASS_INT DRDY accelerometer : b'0001_001x 6.3V 6.3V C8100 C8101 geomagnetic : b'0001_011x 0.1u 0.1u LGE Internal Use Only - 103 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 105: Proximity Sensor Troubleshooting
& Call connected Object moved at the Proximity sensor LCD off? Change the main board Function is OK? LGE Internal Use Only - 105 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 106 SENSOR0_I2C_SCL APDS-9130 : b'0111001x LEDK LEDA C8400 C8401 6.3V 6.3V RevB) DGMS RevB) DGMS Proximity sensor
LGE Internal Use Only - 106 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 107: Power On Troubleshooting
PWR key press -> BAT_FET_N goes low -> GPIO8 High -> VREG_S3 High -> VREG_L6 High -> VREG_L12 High -> BB_CLK -> PON_RESET_N goes high -> PS_HOLD High. SW9711 R9607 PM_KYPD_PWR_N TP1(R9607) VREG_S1_1P15 VREG_S2_1P15 VREG_S3_1P35 VREG_S4_2P1 TP4(C4139) LGE Internal Use Only - 107 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 108 R4110 BB_CLK1 BB_CLK R4112 BB_CLK2 NFC_CLK_OUT R4114 SLEEP_CLK1 SLEEP_CLK QCT Ref.checklist (05/30) VREF_BAT_THERM VREF_BAT_THM VREF_LPDDR2 VREF_LPDDR REF_BYP GND_REF LGE Internal Use Only - 108 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 109 (0.7V) TP4: C4139 PON_RESET_N high? Check U4100(PM8226) TP5:TP4103 Check U4100(PM8226) PS_HOLD (TP6:R4104) Check battery connector & +VPWR line filter(CN9100,FL9100) LGE Internal Use Only - 109 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 110 3. TROUBLE SHOOTING TP5(TP4103) TP1(R9607) TP4(C4139) TP2(X4100)
TP6(R4104) TP3(R4110)
LGE Internal Use Only - 110 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 111: Fm Trouble Shooting
C1620 C1665 C1607 L1140 L1627 C1668 R1600 C1666 LGE Internal Use Only C1613 - 111 - Copyright © 2014 LG Electronics. Inc. All right reserved. C1507 Only for training and service purposes C1512 C1614 TP2200 U1500 C2350 C1511 C1504 C1618...
Page 112 C1618 C1609 C2398 L1501 C1505 C1610 C1608 C1202 C1617 U1201 C1510 C1671 LGE Internal Use Only - 112 - Copyright © 2014 LG Electronics. Inc. All right reserved. C1503 C1676 C1672 Only for training and service purposes C1200 C4155 C1508...
Page 113 C5105 is 1.3V? Check RF Line. : L5101, L5100, C6610, L6610, D6610 FM RX Signal exist? L5101 Check U5100 (WCN3620) LGE Internal Use Only - 113 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 114 C1618 C1609 C2398 L1501 C1505 C1610 C1608 C1202 C1617 U1201 C1510 C1671 LGE Internal Use Only - 114 - Copyright © 2014 LG Electronics. Inc. All right reserved. C1503 C1676 C1672 Only for training and service purposes C1200 C4155 C1508...
Page 115 If 2.4GHz WLAN spurs are observed around 2.6 to 2.7 GHz, replace R5102 with upto 20 nH inductor. R5105 VREG_L16_3V3 LGE Internal Use Only - 115 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 116: Usb Trouble Shooting
Check VREG_L10_1V8 (TP3:C2359) and Check U4100(PM8226) VREG_20_3V075 (TP4:C2360) is high? USB_D_P is high? Check Lower FPCB (TP5:FL101) Change the Main PCB LGE Internal Use Only - 116 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 117 3. TROUBLE SHOOTING CN9400 USB_D_P USB_D_M SPK_P SPK_N PM_USB_ID VBUS_USB_IN 0618 ENBY0040701 LS-MTRON TP1(C9402) 0603,5.5V,35V,33pF +5V0_VREG_BHARGER +VPWR TP2(C4142) CHG_PGND LGE Internal Use Only - 117 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 118 PM_USB_ID : direct connection to USB connector to detect ID when MSM PHY is off D102 D103 C106 Rev.G Part change (06/24) size change (0603-->1006) LGE Internal Use Only - 118 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 119 3. TROUBLE SHOOTING TP5(FL101) TP2(C4142) TP3(C2359) TP4(C2360) TP1(C9402)
LGE Internal Use Only - 119 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 120: Download
TOOL VERSION DLL NAME USB DRIVER Please Check the Version to “B2B” Name Part No. Software D/L Cable LGE Internal Use Only - 120 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 132 4. DOWNLOAD LGD405 LGD405 LGD405AT-00-V10a-SSV-XXX-JUN-03-2013+0.tot LGD405 LGE Internal Use Only - 132 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 133 4. DOWNLOAD LGD405 LGD405 LGD405AT-00-V10a-SSV-XXX-JUN-03-2013+0.tot LGD405 LGD405 LGE Internal Use Only - 133 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 137: Block Diagram
- Up key Speaker (1810) - Down key 5V_USB - Home key Ear-Jack (Side Contact) KPD_PWR_N USB Con. LGE Internal Use Only - 137 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 138 5. BLOCK DIAGRAM [LGD405] RF -Main Option : G850(G900) WCDMA B1 WCDMA B2, B8(B5) Atten LGE Internal Use Only - 138 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 140 (8M pixel) LDO_3 CAM_AVDD_2V8 VREG_L6_1V8 Touch +VPWR LDO_1 VREG_L28_2V95 VREG_L28 ATMX336 ATMX336 Front CAM (1.3M) PMIC_VIB_N +VPWR PMIC_VIB_N LGE Internal Use Only - 140 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 141 (1.2GHz Quad SDC1_CMD MSM_RESOUT_N Cortex-A7) RST_N RESOUT_N SDCARD_DATA_0~3 SDC2_D_0~3 SDCARD_CLK SDC2_CLK Micro SD socket SDCARD_CMD SDC2_CMD SDCARD_DET GPIO_37 LGE Internal Use Only - 141 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 142 RX0~RX12 GPIO 18 GPIO_18 RX0~RX12 RX0~RX12 GPIO_19 TOUCH COB TOUCH Panel GPIO_17 TOUCH_MAKER_ID GPIO 116 GPIO_116 TOUCH_MAKER_ID_2 GPIO_16 LGE Internal Use Only - 142 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 143 VT Camera MIPI CSI1 CLK P/N MIPI_CSI1_CLK_P/N VT_MAKER_ID (VGA) GPIO_1 VT_CAM_MCLK GPIO_27 CAM0_I2C_SDA CAM0_I2C_SCL VT_CAM_PWDN GPIO_31 VT_CAM_RESET_N GPIO_28 LGE Internal Use Only - 143 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 144 GPIO_115 Proximity LEDA MSM8226 (1.2GHz Quad Cortex-A7) VREG_LVS1_1V8 IRRC D IRRC TXD D_IRRC_TXD GPIO_33 WCD9302 LINE_OUT_IRRC LINE_OUT1 GPIO_28 LGE Internal Use Only - 144 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 145 VDD_TX_RX VREG_S4_2P1 VSW_S4 VDD_BUCK VDD_SPKDRV EAR_SENSE_JACK MBHC_HSDET HPH_L HPH_L HPH_R HPH_R EAR_MIC_JACK MIC2_INP MIC_BIAS_2 MIC_BIAS2 MIC2 INM MIC2_INM LGE Internal Use Only - 145 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 146: Circuit Diagram
7. BGA PIN MAP 7. BGA PIN MAP U1500-WTR2605 U1500-WTR2605 Not Used LGE Internal Use Only - 162 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 151 7. BGA PIN MAP U6100-CODEC IC(WCD9302) U6100-CODEC IC(WCD9302) Not Used LGE Internal Use Only - 167 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 152 Converter(LM3263) 7. BGA PIN MAP U1201-DCDC Converter(LM3263) Not Used LGE Internal Use Only - 168 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 153: Pcb Layout
- Quick Cover not operate U1500 : Modem WTR205 - no Network Service - no Power PID1 LG-D405_EAX65568301_1.1_MAIN_TOP - 169 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 154 CN9100 ANT2500 SW101: RF Mobile Switch - no Network service R1108 L1137 C1163 L1136 SW1100 D9400 D9401 LG-D405_EAX65568301_1.1_MAIN_BOT - 170 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 156 C103 FL101 C112 L100 FL100 D104 D101 L101 C106 C105 R101 L102 SW100 ANT100 C102 ANT101 CN103 LG-D405_EAX65671801_F_LOWE_1.0_BOT - 172 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 157 I/O Cable RF Cable_Main Power Supply_PIF Power Supply 5.3V Power Supply_Phone Power Supply 5.0V RF Test Equipment E5515C(8960) NOTICE LGE Internal Use Only - 173 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 159 9. CALIBRATION LGD405 MS695 [Tachyon36]LGMS695_20120213_Calibration LGD405 LGE Internal Use Only - 175 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 162 9. CALIBRATION LGD405 LGD405 LGD405 LGD405 LGD405 LGD405 LGD405 LGD405 LGE Internal Use Only - 178 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 165 9. CALIBRATION RF cable : (P/No : “RIF-200 and phone” are connected in 5P E-SATA DC_Plug 5P E-SATA DC_Plug LGE Internal Use Only - 181 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 173: Calibration
9. CALIBRATION LGD405 MS695 MS695 LGD405 LGD405 LGD405 LGD405 LGD405 LGD405 LGD405 LGE Internal Use Only - 189 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 176: Hidden Menu
Start the desired menu: Menu, click Version Info Classified Information representation -> Hidden Menu -> Settings -> Version Info LGE Internal Use Only - 192 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 177 All auto Test - Full (+Power) -> You can check Test Results When you touch the screen with pushing power key LGE Internal Use Only - 193 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 178 SIM Switch key : touch key Proximity Sensor : Blind the Proximity sensor Camera Test – Snapshot Touch screen to capture LGE Internal Use Only - 194 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 179 Camera is recoding for 5 seconds VT Camera Test Show the VT Camera image Display Check Test Check Black & White Color LGE Internal Use Only - 195 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 180 Check the sound Vibrator Test Check the vibration IrRC Test Touch the ‘Start’ Button and check IrRC function through JIG LGE Internal Use Only - 196 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 181 GPS(RF) test : CNO is some value : OK Bluetooth Scanning is PASS : OK WiFi Scanning is PASS : OK LGE Internal Use Only - 197 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 182 Loopback Test Check the Audio loopback Check the Speaker loopback Individual item You can test only individual item LGE Internal Use Only - 198 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 183: Disassemble Guide
11. DISASSEMBLE GUIDE 11. DISASSEMBLE GUIDE 1. Disassemble Battery Cover Take apart the battery cover using notch below LGE Internal Use Only - 199 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 184 11. DISASSEMBLE GUIDE 2. Disassemble Battery & Screw Take apart the battery and remove screw (11 point) LGE Internal Use Only - 200 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 185 2. Insert spatula, in the bottom right of the phone and unhook right, top and left (Back view) LGE Internal Use Only - 201 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 186 1. Take connectors and coaxial cable (1~6) out of 2. Take apart the Main PCB the Main PCB LGE Internal Use Only - 202 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 188: Exploded View & Replacement Part List
12. EXPLODED VIEW & REPLACEMENT PART LIST This document is draft version, so the contents will be updated after registering the final one. LGE Internal Use Only - 204 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...

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