Page 1 Internal Use Only Service Manual LG-D120 Date : August, 2014 / Issue 1.0...
Page 2: Table Of Contents
3.12 Camera ....................93 3.13 LCD ......................95 3.14 BT/Wifi ..................... 98 3.15 GPS......................101 3.16 FM Radio ....................105 LGE Internal Use Only - 2 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 3: Introduction
In accordance with these agencies, you may be required to provide information such as the following to the end user. - 4 - LGE Internal Use Only - 3 - 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. - 5 - LGE Internal Use Only - 4 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 5: Performance
Product SPEC 2.1 Product Name 2.1 Product Name LG-D120 : WCDMA 900/2100+GSM850/EGSM/DCS/PCS 2.1 Product Name LG-D120 : WCDMA 900/2100+GSM850/EGSM/DCS/PCS(HSUPA 5.8Mbps(cat6)/HSDPA 14.4Mbps(cat8)/GPRS Class12/EDGE Rx only (HSUPA 5.8Mbps(cat6)/HSDPA 14.4Mbps(cat8)/GPRS Class12/EDGE Rx only Class12) Class12) LG-D120 : WCDMA 900/2100+GSM850/EGSM/DCS/PCS 2.2 Supporting Standard 2.2 Supporting Standard (HSUPA 5.8Mbps(cat6)/HSDPA 14.4Mbps(cat8)/GPRS Class12/EDGE Rx only Class12)
Page 6: Hw Features
8. Main Camera (2M) View Angle 42.3˚(V) / 54.7 ˚(H) / 65.7 ˚(D) Image Scaling Down 2M(1600*1200), 1M(1280*960) LGE Internal Use Only - 6 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 7 Max 40Mbps (SDIO Driver performance) depend on environment 0 ~ 50m (depend on environment) 13. GPS type A-GPS LGE Internal Use Only - 7 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 8: Hw Spec
Δf = 8.5~12.5MHz dBc/1MHz 9kHz ~ 150kHz 150kHz ~ 30MHz Transmit Spurious Emission 30MHz ~ 1GHz 1GHz ~ 12.5GHz LGE Internal Use Only - 8 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 9 +1.5/4 -0.5/+0.5 -0.5/+0.5 -0.5/+0.5 -0.5/-1.5 -1/-3 -1.5/-4 Inner Loop Power Control group(10equal command group) In Uplink +8/+12 +16/+24 LGE Internal Use Only - 9 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 10 Magnitude (EVM) -20 dBm with HS-DPCCH 6.3A Maximum Input Level for Receiver Pin = -25dBm BLER(%) HS-PDSCH Reception LGE Internal Use Only - 10 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 11 : -98dBm/-96dBm (2.439%) AM Suppression -98dBm/-96dBm (2.439%) GSM : -31dBm - DCS : -29dBm Timing Advance ± 0.5T LGE Internal Use Only - 11 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 12 Drift Rate Freq. Drift Carrier Frequency Drift 10101010 kHz/50us Drift Rate Freq. Drift 10101010 kHz/50us Drift Rate LGE Internal Use Only - 12 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 13 Δf = -5MHz (CW_i) Input power @CW_i Δf = -10MHz (BT_i) -64dBm@ BT_w Maximum Input Level PRBS9 Input power @BT_w LGE Internal Use Only - 13 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 14 ≥ -10dBm(1Mbps,2Mbps,5.5Mbps,11Mbps) @ FER ≤ 8% Rx Max input Sensitivity ≥ 35dB @FER ≤ 8%, Rx Adjacent Channel interference input signal -70dBm@fc±25MHz(11Mbps) Rejection LGE Internal Use Only - 14 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 15 ※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 - 15 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 16 ※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 - 16 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 17 500uA Under 500 uA 7. Backup Battery under 5uA under 5uA 7. Backup Battery under 5uA under 5uA LGE Internal Use Only - 17 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 18 -109 ±3dBm -106 ±3dBm 10 -100 ±2dBm -103 ±2dBm -104 ±2dBm 21 -107 ±3dBm -109 ±3dBm -106 ±3dBm 10 LGE Internal Use Only - 18 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 19 4% ~ 15% : One Time popup (No call) Critical Low Battery Pop-up 0% ~ 3% : Every Level change popup (No call) Power Off LGE Internal Use Only - 19 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 20: Trouble Shooting
* There are no Test Points on the IQ Data Line. So It is impossible to check the IQ Data Wave form. LGE Internal Use Only - 20 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 21 3. TROUBLE SHOOTING MT6166 (U1500) RF3237 (U1100) (FL1300) (FL1301) <Main Bot> LGE Internal Use Only - 21 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 22 +2V8_VTCXO_MTK is OK? Refer to Logic troubleshoot DC Power Supply Circuit is OK See Next page to Check XO Circuit LGE Internal Use Only - 22 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 23 (+1V825_VRF_MTK ) TP2 : C1504 (+1V825_VRF_MTK ) TP6: C1501 (+2V8_VTCXO_MTK ) <Main Bot> R1505, R1506 is deleted (12/26 ) LGE Internal Use Only - 23 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 24 XO circuit is Ok . See next page Is it similar ? to check RF signal path. Replace Main B/D LGE Internal Use Only - 24 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 25 3G_RX_B5_N 3GB8_RXP 3GB8_RXN B40_RXP B40_RXN NOTE 1 PDET_IN XTAL1 XTAL2 OZ26000004 X1500 TST1 TST2 R1514 RCAL TOL=0.01 RFVCO_MON LGE Internal Use Only - 25 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 26 PAM is OK. See next page to check DPX The Problem may be Logic part Refer to Logic troubleshoot LGE Internal Use Only - 26 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 27 3. TROUBLE SHOOTING U1100 TP2(B1) : C1311 (RF3237) TP2(B8) : C1300 TP1 : C1104 <Main Bot> LGE Internal Use Only - 27 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 30 Replace FL103 All WCDMA_B1/B2/B5/B8 Rx check is complete. If the phone sill do not work ,replace main board LGE Internal Use Only - 30 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 31 3. TROUBLE SHOOTING TP2(B8) : L1300 TP2(B1) : C1302 U1100 (RF3237) (FL1301) (FL1300) TP1 : C1104 <Main Bot> LGE Internal Use Only - 31 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 32 GND1 GND2 GND4 L1314 L1317 GND3 GND5 1.2p EAM62930901 EAM62810101 EAM62930901 SW1100 2.7n L1104 COMMON C1104 L1107 0.5p LGE Internal Use Only - 32 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 34: Wcdma Tx Part
* There are no Test Points on the IQ Data Line. So It is impossible to check the IQ Data Wave form. LGE Internal Use Only - 34 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 35 3. TROUBLE SHOOTING MT6166 (U1500) RF3237 (U1100) (FL1300) (FL1301) <Main Bot> LGE Internal Use Only - 35 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 36 +2V8_VTCXO_MTK is OK? Refer to Logic troubleshoot DC Power Supply Circuit is OK See Next page to Check XO Circuit LGE Internal Use Only - 36 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 37 (+1V825_VRF_MTK ) TP2 : C1504 (+1V825_VRF_MTK ) TP6: C1501 (+2V8_VTCXO_MTK ) <Main Bot> R1505, R1506 is deleted (12/26 ) LGE Internal Use Only - 37 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 38 XO circuit is Ok . See next page Is it similar ? to check RF signal path. Replace Main B/D LGE Internal Use Only - 38 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 39 3G_RX_B5_N 3GB8_RXP 3GB8_RXN B40_RXP B40_RXN NOTE 1 PDET_IN XTAL1 XTAL2 OZ26000004 X1500 TST1 TST2 R1514 RCAL TOL=0.01 RFVCO_MON LGE Internal Use Only - 39 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 40 The Problem may be Logic part Whether it is higher than 1.5V Refer to Logic troubleshoot Replace U103/U104 LGE Internal Use Only - 40 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 41 3. TROUBLE SHOOTING TP4:C1316 TP2 : L1314 TP3: C1317 SKY77758 (U1300) TP1:L1306 TP5:C1318 <Main Bot> LGE Internal Use Only - 41 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 42 3G_PA_LB_EN GND2 RFIN_LB VBATT RFOUT_HB RFIN_HB CPL_IN GND1 VMODE PA_MODE_SEL_0 CPL_OUT VEN_HB 3G_PA_HB_EN R1302 R1303 PDET_IN Figure 3.2.1.4 LGE Internal Use Only - 42 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 43 All WCDMA_B1/B8 Tx check is complete. If the phone sill do not work ,replace main board Figure 3.1.1 (b) LGE Internal Use Only - 43 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 44 3. TROUBLE SHOOTING TP1(B8): C1300 TP2(B1) : C1311 (FL1301) (FL1300) <Main Bot> LGE Internal Use Only - 44 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 45 C1312 3.9n L1312 L1313 RX_OUT2 2.7n GND1 GND2 GND4 L1314 L1317 GND3 GND5 TP2(B1) 1.2p EAM62930901 EAM62810101 EAM62930901 LGE Internal Use Only - 45 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 46: Gsm Rx Part
* There are no Test Points on the IQ Data Line. So It is impossible to check the IQ Data Wave form LGE Internal Use Only - 46 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 47 3. TROUBLE SHOOTING MT6166 (U1500) RF3237 (FL1100) (U1100) <Main Bot> LGE Internal Use Only - 47 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 48 +2V8_VTCXO_MTK is OK? Refer to Logic troubleshoot DC Power Supply Circuit is OK See Next page to Check XO Circuit LGE Internal Use Only - 48 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 49 (+1V825_VRF_MTK ) TP2 : C1504 (+1V825_VRF_MTK ) TP6: C1501 (+2V8_VTCXO_MTK ) <Main Bot> R1505, R1506 is deleted (12/26 ) LGE Internal Use Only - 49 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 50 XO circuit is Ok . See next page Is it similar ? to check RF signal path. Replace Main B/D LGE Internal Use Only - 50 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 51 3G_RX_B5_N 3GB8_RXP 3GB8_RXN B40_RXP B40_RXN NOTE 1 PDET_IN XTAL1 XTAL2 OZ26000004 X1500 TST1 TST2 R1514 RCAL TOL=0.01 RFVCO_MON LGE Internal Use Only - 51 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 52 PAM is OK. See next page to check DPX The Problem may be Logic part Refer to Logic troubleshoot LGE Internal Use Only - 52 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 53 3. TROUBLE SHOOTING TP2(G850/900): L1103 U1100 (RF3237) TP2(G1800/1900): L1111 TP1 :C1104 <Main Bot> LGE Internal Use Only - 53 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 54 GND14 TRX2 GND15 GND5 GND16 GND4 GND17 GND3 GND18 VBAT VBATT C1120 C1108 C1109 ANT0_SW_SEL_0 ANT0_SW_SEL_1 ANT0_SW_SEL_2 GSM_PA_EN LGE Internal Use Only - 54 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 55 To Figure 3.1.1(b) Is any signal detected at that point Check anything point SAW filter is OK. Replace main B/D. LGE Internal Use Only - 55 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 56 5.6n GSM1800/1900_UnB GSM1800/1900_Bal1 L1105 1.5n 2G_RX_HB_P GND2 GSM1800/1900_Bal2 L1108 2G_RX_LB_N GND1 GSM850/900_Bal1 GSM850/900_UnB GSM850/900_Bal2 L1109 L1110 L1112 2G_RX_LB_P LGE Internal Use Only - 56 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 58: Gsm Tx Part
3. TROUBLE SHOOTING 3.4 GSM Tx Part 3.4.1 GSM850/900/DCS/PCS Tx MT6166 (U1500) RF3237 (U1100) <Main Bot> LGE Internal Use Only - 58 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 59 +2V8_VTCXO_MTK is OK? Refer to Logic troubleshoot DC Power Supply Circuit is OK See Next page to Check XO Circuit LGE Internal Use Only - 59 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 60 (+1V825_VRF_MTK ) TP2 : C1504 (+1V825_VRF_MTK ) TP6: C1501 (+2V8_VTCXO_MTK ) <Main Bot> R1505, R1506 is deleted (12/26 ) LGE Internal Use Only - 60 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 61 XO circuit is Ok . See next page Is it similar ? to check RF signal path. Replace Main B/D LGE Internal Use Only - 61 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 62 3G_RX_B5_N 3GB8_RXP 3GB8_RXN B40_RXP B40_RXN NOTE 1 PDET_IN XTAL1 XTAL2 OZ26000004 X1500 TST1 TST2 R1514 RCAL TOL=0.01 RFVCO_MON LGE Internal Use Only - 62 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 63 Check if there is any major difference referring PAM circuits OK See next page. To Figure 3.2.1.4 Is it similar ? Replace U1100 LGE Internal Use Only - 63 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 64 3. TROUBLE SHOOTING TP2(DCS/PCS): C1111 (U1100) TP2 (850/900) : C1117 TP1 : L1104 <Main Bot> LGE Internal Use Only - 64 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 65 GND16 GND4 GND17 GND3 GND18 VBATT TP2(DCS/PCS): C1111 C1111 2G_TX_HB C1117 2G_TX_LB R1104 10K TP2 (850/900) : C1117 LGE Internal Use Only - 65 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 66: Power
Power ON sequence of D120 VBAT DDLO UVLO PWRKEY BBWAKEUP VRTC VPROC VSYS VIO18/VEMC_3V3 VA/VIO28 VUSB VMC/VMCH VTCXO RESETB - 55 - LGE Internal Use Only - 66 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 67 Check MT6323 PAM Voltage level? R4130 Check MT6323 RTC CLOCK Change MT6323 And Return to Start Check Battery connector (CN9501) LGE Internal Use Only - 67 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 68 VPA_1 VPA_2 C4134 C4135 2.2u ZD4132 DNI_EDSY0019601 Near-end cap VPA_FB L4132 680n VSYS +2V2_MTK_AVDD +2V8_MTK_VA System DC/DC INDUCTOR(L4132) LGE Internal Use Only - 68 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 69 3. TROUBLE SHOOTING VBAT VREF_BAT_THERM R9518 BAT_ON BATT_TEMP_ADC TOL=0.01 C9504 C9505 C9506 C9529 CN9501 0.1u 100p BATTERY CONNECTOR(CN9501) LGE Internal Use Only - 69 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 70 3. TROUBLE SHOOTING PWR KEY BATTERY CONNECTOR(CN9501) Core DC/DC INDUCTOR(L4130) System DC/DC INDUCTOR(L4132) <Main Bot> LGE Internal Use Only - 70 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 71: Charging
VBAT U4101 ISET U4101 EXT_CHG_STAT VSS1 VCHG_LDO_4V9 VSS2 EXT_CHG_EN IFULL EN_SET IEOC Setting 3K ohm : 100mA U4101 LGE Internal Use Only - 71 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 72 Is it charging properly After turning on? Change the Charger IC ( U4101 ) Connection OK? Change the Main PCB LGE Internal Use Only - 72 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 73: Usb Ts
Change I/O connector (CN9502) Connection OK? Change the Main PCB Is the signal ok for USB+ & - ? LGE Internal Use Only - 73 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 74: Audio
AU_MICBIAS1 AU_MICBIAS0 MIC IN2 P MIC_IN2_P AU_VIN1_P MIC_IN1_P AU_VIN0_P AU_VIN1_N MIC_IN2_N AU_VIN0_N MIC_IN1_N ACCDET Headset HOOK_DETECT Main MIC LGE Internal Use Only - 74 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 75 Hear the sound to the Speaker? Change Speaker Module? Check Main PCB. C4101(TP1), FB8504,8505(TP2), C8012,8013(TP3) Speaker Sound OK? Change Main Board LGE Internal Use Only - 75 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 76 Use the Option 1 AU_HSP AU_HSN C8011 CN8100 FB8504 RCV_N FB8505 RCV_P TP2(FB8504,8505) EAB62688401 BRS-181031P08-P 330p 330p C8012 C8013 TP3(C8012,8013) LGE Internal Use Only - 76 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 77 3. TROUBLE SHOOTING TP1(C4101) U4100 <Main Bot> TP3(C8012,8013) TP2(FB8504,8505) <Main Top> LGE Internal Use Only - 77 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 78 Change Receiver Module. Can you hear a sound? Check Main PCB.(C4101, FB8504,8505, C8012,8013)Receiver Sound OK? Change Main Board LGE Internal Use Only - 78 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 79 Check parts about Mic Bias Mic works well? (R8102,R8116) Change MIC8100 or MT6323(U4100). Mic works well? Change Main Board LGE Internal Use Only - 79 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 80 MIC_IN1_N VA8103 VA8102 C8109 C8110 EDTY0012501 Check L8102,8103 and MIC Bias voltage level (R8116, R8102) R8116, R8102 L8102,8103 LGE Internal Use Only - 80 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 81 Check the left signal and detection line short when headset inserted? Change MT6323(U4100). Mic works well? Change Main Board LGE Internal Use Only - 81 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 82 R8109 L8101 FM_ANT MIC_IN2_N HPH_AMP_R R8507 2.2K C8111 R8110 EAR_SENSE_JACK R8508 HPH_AMP_L MIC_IN2_P C8112 C8114 C8113 MAIN GND LGE Internal Use Only - 82 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 83 * Check Parts about earjack detect (R8107, R8110, R8106) Check Parts about earjack detect (R8107, R8110, R8106) <Main Top> LGE Internal Use Only - 83 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 84 Sound play via headset? Check TPA6136(U8102) and peripheral circuits Works well? Check MT6323(U4100). Works well? Change Main Board LGE Internal Use Only - 84 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 85 Check the input power +VBATT and Gain Parameter (C8501, R8503) In case of you can’t heard anything, check C8509~8512 If the sound is abnormal, check C8115,C8116 LGE Internal Use Only - 85 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 86: 3Axis Sensor
SDA/SDI/SDO GND2 SDO/SA0 U8100 GND3 K2DH SENSOR0_I2C_SCL SCL/SPC VDD_IO ACCEL_INT C8100 C8125 0.1u < > 3 AXIS sensor LGE Internal Use Only - 86 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 87 Change the 3 AXIS Sensor IC(U8100) 3 AXIS Sensor function is OK? Change the main board 3 AXIS Sensor Function is OK? LGE Internal Use Only - 87 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 88 SENSOR0_I2C_SDA SDA/SDI/SDO GND2 U8100 U8100 SDO/SA0 GND3 K2DH SENSOR0_I2C_SCL SCL/SPC VDD_IO ACCEL_INT C8100 C8125 0.1u U8100 <Main Bot> LGE Internal Use Only - 88 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 89: Touch Sensor
Check I2C Line & Signal Line (TP3 &TP4) Touch Works OK? Change Touch Module Touch Works OK? Change Main Board LGE Internal Use Only - 89 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 90 VA7209 TP4(VA7208) +3V0_TOUCH_MTK : TP2 (C7214) +3V0_TOUCH_MTK : TP2 (C7214) TP4(VA7208) TP3(VA7209) +1V8_VIO_MTK : TP1 (R7201) <Main Bot> LGE Internal Use Only - 90 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 91: Vibrator
Check Power 3.0V Motor Power is OK? Check Main PCB VB8100 Pad. Is it Normal? Change Main Board LGE Internal Use Only - 91 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 92 3. TROUBLE SHOOTING Motor Power Motor Power L8112 Motor Power VB8100 L8113 +3V0_MTK_VIBR 2 2 7 VA8108 EAU62128001 DM-YK408 DNI_SEVY0005101 LGE Internal Use Only - 92 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 93: Camera
Check VIO(TP1), AVDD(TP2 ),DVDD(TP3) Change the Main board Check the camera signals MCLK(TP4) Change the Camera Camera is OK ? LGE Internal Use Only - 93 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 94 C5003 VIO: TP1(C5002) AVDD: TP2(C5004) 2.2u DNI_SEVY0005101 MCLK: TP4 (R7206) VIO: TP1(C5002) AVDD: TP2(C5004) DVDD: TP3(C5003) <Main Bot> LGE Internal Use Only - 94 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 95: Lcd
LCD display is OK ? Check LCD Power +2V8_LCD_VCI(TP1), Change the LCD Module +1V8_LCD_VIO(TP2), LCD_BL_EN(TP3) Change the Main Board The LCD works LGE Internal Use Only - 95 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 96 LED6 LCD_BL_EN: TP3 LED5 MLED_5 (R7205) LED4 MLED_4 LED3 MLED_3 LED2 MLED_2 LED1 MLED_1 VOUT C7211 C7209 2.2u LGE Internal Use Only - 96 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 97 3. TROUBLE SHOOTING VCI: TP1 (C7203) VIO: TP2 (C7200) LCD_BL_EN: TP3 (R7205) <Main Bot> LGE Internal Use Only - 97 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 99 0.5p +1V8_MTK_VCN 5_1_1_11_BT_WiFi_GPS_FM_MT6627_V0_3_1129144809 WB_GPS_RFIN GPS_DPX_RFOUT +3V3_MTK_VCN AVDD33_WBT U5100 R5101 +2V8_MTK_VCN AVDD28_FM MT6627 FM_RX_IN_N FM_LANT_N L5108 FM_LANT_P FM_ANT GPS_RFIN LGE Internal Use Only - 99 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 100 Check the signal level at TP2 (C5122) Check the Antenna contact point(TP3) Check Antenna Clip or well(ANT5100) Replace Antenna BT-WiFi will work properly LGE Internal Use Only - 100 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 102 3G_RX_B5_N 3GB8_RXP 3GB8_RXN B40_RXP B40_RXN NOTE 1 PDET_IN XTAL1 XTAL2 OZ26000004 X1500 TST1 TST2 R1514 RCAL TOL=0.01 RFVCO_MON LGE Internal Use Only - 102 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 103 FM_ANT FM_LANT_P C5109 100p GPS_RFIN GPS_RX_IP 5_1_1_11_BT_WiFi_GPS_FM_MT6627_V0_3_1129144809 GPS_RX_IN AVDD18_GPS GPS_RX_QP +1V8_MTK_VCN DVSS GPS_RX_QN L5111 5_1_1_11_BT_WiFi_GPS_FM_MT6627_V0_3_1129144809 Close to MT6627 LGE Internal Use Only - 103 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 104 Check the signal level at TP5(C5106) Check the Antenna contact point(TP6) Check Antenna Clip or well(ANT5102) Replace Antenna GPS will work properly LGE Internal Use Only - 104 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 105: Fm Radio
3. TROUBLE SHOOTING 3.16 FM Radio TP2(L8105,L8101) <Main Top> TP1(L5108) <Main Bot> LGE Internal Use Only - 105 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 106 3. TROUBLE SHOOTING +1V8_MTK_VIO L8101 FM_ANT R8507 HPH_AMP_R R8110 EAR_SENSE_JACK TP2(L8105,L8101) R8508 HPH_AMP_L R8111 L8105 LGE Internal Use Only - 106 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 107 Give the addition solder in (L8101,L8105,L5108) Good? L8101,L8105 (TP2),L5108 (TP1) Replace U5100 Check Bias Voltage Good? FM will work properly LGE Internal Use Only - 107 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 108: Download
Please Check the Version to “B2B” Name Part No. Software D/L Cable Micro 5P (56-open-910K) USB DLC RAD32167835 LGE Internal Use Only - 108 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 110 4. DOWNLOAD LGD120 LGD120_20140701_LGFLASHv151_Download LGD120 LGE Internal Use Only - 110 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 120 4. DOWNLOAD LGD120 LGD120_20140701_LGFLASHv151_Download LGD120_20140701_LGFLASHv151_Download LGD120 LGD120AT-00-V10a-SSV-XXX-JUN-03-2013+0.tot LGD120 LGE Internal Use Only - 120 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 121 4. DOWNLOAD LGD120_20140701_LGFLASHv151_Download LGD120AT-00-V10a-SSV-XXX-JUN-03-2013+0.tot LGD120 LGD120 LGE Internal Use Only - 121 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 125: Block Diagram
5. BLOCK DIAGRAM 5. BLOCK DIAGRAM [D120] (Single SIM) block diagram RF I/F Duplexer Duplexer 26MH 26MHz FM RADIO LGE Internal Use Only - 125 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 126 TRX3 FILTER +2V8+MTK_VTCXO GSM850_GSM900_RX 3G_RX_LB_N MT6323 PMIC GSM_PA_EN BPI_BUS3 TX_EN VRAMP GSM_PA_RAMP BPI_BUS0 MODE MODE BPI_BUS1 BPI_BUS2 ANT_SEL0~2 LGE Internal Use Only - 126 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 127 CMD eMMC_CMD CMDm MC0_CMD eMMC_CLK_MTK MC0_CK CLKm eMMC_CLK +1V8_MTK_VIO VIO18 +3V3_MTK_eMMC VCCm VEMC_3V3 +1V2_MTK_LPDDR2 1V2 MTK LPDDR2 LGE Internal Use Only - 127 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 128 LRSTB LCD MAKER ID LCD_MAKER_ID SPI_CS TOUCH_INT GPIO_129 I2C SENSOR SDA I2C_SENSOR_SDA TOUCH UTXD2/GPIO_102 I2C_SENSOR_SCL Synaptics URXD2/GPIO_101 S2200 LGE Internal Use Only - 128 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 129 +1V8_MAIN_CAM_DVDD VCAMD +1V8_MAIN_CAM_IOVDD VCAM_IO MT6323 3 Axis Sensor 3 Axis Sensor +1V8_MTK_VIO VIO18 K2DH SENSOR0_I2C_SDA URXD2 SENSOR0_I2C_SDA UTXD2 LGE Internal Use Only - 129 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 130 SPK/RCV MIC_BIAS_2 MIC_BIAS_1 AU_MICBIAS1 AU_MICBIAS0 MIC IN2 P MIC_IN2_P AU_VIN1_P MIC_IN1_P AU_VIN0_P AU_VIN1_N MIC_IN2_N AU_VIN0_N MIC_IN1_N ACCDET HOOK_DETECT LGE Internal Use Only - 130 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 131 WB_CTRL CTRL/GPIO WB_CTRL LNA+ SAW GPS_RX_I_Q GPS_RFIN GPS_RX_I_Q GPS_RX_I_Q GPS LNA EN 26MHz MT6166 VIO_MTK_1V8/2V8/3V3 CONN_XO_IN MT6329 XO_IN LGE Internal Use Only - 131 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 132: Circuit Diagram
2G_TX_LB TRX2 TRX3 R1104 10K GSM_PA_RAMP TRX5 TRX6 LB TX HB TX BOSS HOLE Daisy_Chain OJ900 OJ901 PID1 - 132 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 133 TST2 GND8 GND_AUXADC R1514 Route AUXADC_GND with 24mil trace width RCAL TOL=0.01 RFVCO_MON under VREF_BAT_THERM / AUXADC_TSX trace - 133 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 134 PA_MODE_SEL_0 GND2 GND4 L1314 CPL_OUT VEN_HB 3G_PA_HB_EN L1317 L1315 GND3 GND5 1.2p EAM62930901 EAM62810101 EAM62930901 R1302 R1303 PDET_IN - 134 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 135 AD18 EBI_DQS_3_B EDQS3_B VREF0 AC11 VREF_LPDDR2 EDCLK0_B VREF1 AB17 AA18 EDCLK0 EBI_CLK_B AA19 AF24 EDCLK1_B ERESET EBI_CLK EDCLK1 - 135 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 136 BSI_EN/GPIO_149 RFIC0_BSI_EN RDN0/GPIO_74 BSI_CLK/GPIO_150 MIPI_MTK_DN RFIC0_BSI_CLK RDP1/GPIO_75 BSI_DATA0/GPIO_151 RFIC0_BSI_DATA_0 RDN1/GPIO_76 BSI_DATA1/GPIO_152 RFIC0_BSI_DATA_1 MIPI_MTK_CLKP RCP/GPIO_77 BSI_DATA2/GPIO_153 RFIC0_BSI_DATA_2 MIPI_MTK_CLKN RCN/GPIO_78 - 136 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 137 Based on your system level design, if better FM performance is needed on your system, please refer to FM desense performance enhance proposal. - 137 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 138 VSS_18 AB14 GND_WBG_14 VSS_19 VSS_1 VSS_20 AC21 VSS_2 VSS_21 AD11 VSS_3 VSS_22 VSS_4 VSS_23 AF13 VSS_5 VSS_24 AF26 - 138 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 139 C3321 C3322 VDD1e_4 2.2u 2.2u 470n VDD2e_1 VDD2e_2 VDD2e_3 VDD2e_4 VDD2e_5 +1V2_MTK_LPDDR2 VDD2e_6 C3323 C3324 R3309 240 TOL=0.01 - 139 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 140 AUXADC_GND first MT6323(HPL/R) XOUT to PMIC AUXADC_AUXIN_GPS pin than connect to main GND C4108 C4109 Size is changed (12/26) - 140 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 141 GND_LDO_21 GND_LDO_22 GND_LDO_23 Dedicate VSS ball, must return to cap then to main GND: 1. GND_VREF(N14) => Cap - 141 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 142 MLED_5 LED4 MLED_4 C5004 C5002 C5003 LED3 MLED_3 2.2u LED2 MLED_2 LED1 MLED_1 VOUT DNI_SEVY0005101 C7211 C7209 2.2u - 142 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 143 VA8103 C8109 C8110 R8111 EDTY0012501 L8105 MAIN GND Close to 3.5pi ear-jack R8515 FM_RX_IN_N HS_GND R8517 MAIN GND - 143 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 144 SCLK4/GPIO10 Single Dual Triple ECCH0002001 C9519 COMMON_I2C_SCL SRST4/GPIO11 SIO4/GPIO12 C9510,C9513,C9514,C9515 ECCH0004904 EAG63351601 J9502 COMMON_I2C_SDA ECZH0001215 C9512 EAN62228101 U9500 - 144 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 145 ( DGMS Guide ) Close to MT6627 MC-C00002-14 : ESD Protection Circuit CONN_XO_IN CONN_RSTB FM_DATA FM_CLK CONN_SPI_CLK CONN_SPI_DATA CONN_SPI_EN - 145 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 146: Bga Pin Map
7. BGA PIN MAP 7. BGA PIN MAP U1500 MT6166 RFIC Not Used LGE Internal Use Only - 146 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 152: Pcb Layout
C8012 EAX65765901_1.0_D125F_MAIN ( ) C8113 R8108 FB8102 CN7203 C8011 VA8107 - no Touch VA8106 R8110 R8107 PID1 LG-D120_MAIN_EAX65765901_1.0_TOP - 152 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 153 Function : MIC MIC8100 - no Connect with equipment for call ANT1101 ANT1100 CN9502 - no voice sound LG-D120_MAIN_EAX65765901_1.0_BOT - 153 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 154: Calibration
2. Port Setting (Refer to Attached image) 1) Uart Port2 : Use the “LGE CDMA USB Serial Port” GDMS LGE Internal Use Only - 154 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 155 9. CALIBRATION GDMS D120 MS695 [TachyonV48] LGD120 20140726 ALL File Calibration [Tachyon36]LGMS695_20120213_Calibration LGE Internal Use Only - 155 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 159 9. CALIBRATION D120 LGD120 LGD120 LGD120 LGD120 LGD120 LGD120 LGD120 LGD120 LGE Internal Use Only - 159 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 161 (P/No :BJAY0024004) “RIF-200 and phone” 5.3V are connected in 3G QCT 5P E-SATA DC_Plug 5P E-SATA DC_Plug No: RAD32167861 LGE Internal Use Only - 161 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 170 9. CALIBRATION LGD120 LGD120 LGD120 LGD120 LGD120 LGD120 LGD120 LGE Internal Use Only - 170 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 173: Hidden Menu
• Fake Language • GPS Test • MLT • LG RCT Test • DTV Test • Termal DAE Miti OFF LGE Internal Use Only - 173 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 174 10. GPS / BT / WIFI Test 11. FM Radio Test 12. LoopBack Test Auto All Test Result: -> Display Auto All Test result LGE Internal Use Only - 174 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 175 Menu key : Check Recognition Dual key : Check Recognition End key : Check recognition Camera Test 1 Main Camera Preview LGE Internal Use Only - 175 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 176 • Check the Black display • Check the White display Ring Test : Check sound • Check the sound LGE Internal Use Only - 176 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 177 A case-by-state vibration tests Touch window test Write with finger Motion Sensor Test Accelerometer sensor test • Check the accelerometer sensor LGE Internal Use Only - 177 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 178 • Check the BT scan FM Radio Test • Check the FM Radio (Insert earphone) Loopback Test • Check the Receiver loopback LGE Internal Use Only - 178 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 179 - Vibrator - Camera - Audio Loopback -> test on the device is working (The ability to use plant) LGE Internal Use Only - 179 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 180 • Check the SIM card • Check the SD card • Check Ear phone(jack) • Check Charging Mode LGE Internal Use Only - 180 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 181 LCD Display Test Mura Test : leakage of Light uniformity Keypad test list - Dop - Qwerty (Not Implemented) LGE Internal Use Only - 181 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 182 Audio test list - Ring - Effect Sound - Message Tone Vibrator test list - On/Off - Duration LGE Internal Use Only - 182 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 183 - File Creation in SD Card - File Modification in SD Card - File deletion in SD Card LGE Internal Use Only - 183 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 184 • Battery Health • Battery Mode of Charging • Battery Level • Battery Technology • Battery Voltage • Battery Temperature LGE Internal Use Only - 184 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 185 - ABS On/Off Test - Touch LED Test LCD Test Manual Test Automatic Test Mura Test Proximity Test LGE Internal Use Only - 185 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 186 Touch Key Test Grid Touch Color Change Block Touch Test Touch Firmware Version Check Touch Panel Gesture Test LGE Internal Use Only - 186 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 187 10. HIDDEN MENU Hall Sensor Test Vibrator Duration Test Reset SD Card LGE Internal Use Only - 187 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 188 -Version Info -ALC -Auto run -Diag Settings -Data Settings -Battery -Audio -Camera -Bluetooth -ERS -ETC -LCD Always On LGE Internal Use Only - 188 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 189 - SWFV - FingerPrint Normal Mode : Change to Normal Mode ALC Mode : Change to ALC Mode LGE Internal Use Only - 189 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 190 - USB Set for Data - BT Set for Data - UART Set for Data - Null port LGE Internal Use Only - 190 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 191 • Speech Enhancement • Debug Info • Debug Session • Speech Logger • Audio Logger Camera Camera Clock Settings LGE Internal Use Only - 191 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 192 Add Dummy paired list BT Audio Loopback BT MTK Virtual Sniff Mode MTK Moble Log - Client Status - ERS Test LGE Internal Use Only - 192 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 193 10. HIDDEN MENU ADC Info LCD Always on Switch to LCD Backlight ON/OFF LGE Internal Use Only - 193 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 194 -North America APN Settings Factory Reset -Format SD card : External SD Card Data reset -Factory Rest :Changing the Factory LGE Internal Use Only - 194 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 195 Simme Lock Modem Settings - Connectivity - Bluetooth - CDS Information - FM Receiver - WiFi - WiFi CTIA LGE Internal Use Only - 195 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 196 PLL CG Sleep Mode Device Manager De-Sense Non-sleep mode Memory Power SD Card Test TouchScreen UART/USB Switch Sensor LGE Internal Use Only - 196 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 197 - Modem Reset Delay Setting Modem Settings - Others - Settings Font - SWLA - Thermal - USB ACM LGE Internal Use Only - 197 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 198 - Call Duration Streaming Streaming Setting Edit Edit Enable or not Streaming Log -> Log Enable or not LGE Internal Use Only - 198 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 199 - Radio log - Events log - Kernel log - Qucik Dump - Xlog - Copy Log files LGE Internal Use Only - 199 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 200 10. HIDDEN MENU Flex Test SMPL Counter North America APN Settings LGE Internal Use Only - 200 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 201 Wi-Fi Debug Screen Fake Language Switch to Fake language mode On/Off GPS Test gpsApp Test Air Test (Enable / Disable) LGE Internal Use Only - 201 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 202 10. HIDDEN MENU MLT HIDDEN Menu LG RCT Test LG RCT Check Display Result Copy Result To SD Card LGE Internal Use Only - 202 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 204: Disassemble Guide
1. Remove Battery Cover Assy 2. Remove Battery 3. Remove 6 Point Screws From Rear 4. Remove Cover Rear Assy LGE Internal Use Only - 204 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 205 2. Disassemble Main PCB 1. Remove FPCB CONNECTOR 1EA from PCB 2. Remove Main PCB from Front Assy LGE Internal Use Only - 205 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 206 11. DISASSEMBLE GUIDE 3. Disassemble H/W ITEM Remove Main Cam and Sheild Can LGE Internal Use Only - 206 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 208: Exploded View & Replacement Part List
Screw, Machine EBP00 Camera Module EAC00 Rechargeable Battery, Lithium Ion MBK00 Can, Shield MCK00 Cover, Battery ABH00 Button Assembly - 208 - LGE Internal Use Only Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 209 COMPLEX LGD125F.ABTMWH ZZ:Without Color - MJN061100 Tape,Protect MJN68887601 COMPLEX LGD125F.ABTMWH ZZ:Without Color - MJN107400 Tape,USP Film MJN68887706 COMPLEX LGD125F.ABTMWH ZZ:Without Color - LGE Internal Use Only - 209 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 210 MEZ65049701 label AAD000000 Addition Assembly AAD86978710 LGD120.AGRCKU KU:BLACK BLUE - MCK00 Cover,Battery MCK68168315 MOLD PC LGD125F.ABTMWH BK:Black - LGE Internal Use Only - 210 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 211 HIFILL 3075B . . NONE PCB Assembly, EBR071800 EBR79379309 LGD120.AGRCWP 1.0 Main Main,SMT PCB Assembly, EBR071700 EBR79340001 LGD125F.ABRAWP 1.1 Main Main,SMT Top LGE Internal Use Only - 211 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 212 GRM1555C1H6R8C_H 6.8pF 0.25PF 50V C0G - Capacitor(High 55TO+125C 1005 R/TP 0.5+/-0.05 L:1.0+-0.05 C5122 Frequency), EAE62883601 W:0.5+-0.05 T:0.5+-0.05 MURATA Ceramic,Chip MANUFACTURING CO.,LTD. LGE Internal Use Only - 212 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 213 Software,Mobile SAD34769501 Android KK Base D12010b - EUROPE MTK - EBR071600 Assembly,Main,SM EBR79379609 LGD120.AGRCWP 1.0 Main T Bottom LGE Internal Use Only - 213 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 214 1.9GHZ 8 SHIELD NONE 1.0X0.5X0.5MM R/TP Chip MURATA MANUFACTURING CO.,LTD. R8514 MCR01MZSJ000 0OHM 5% 1/16W 1005 R/TP - Resistor,Chip ERHZ0000401 R8517 ROHM. LGE Internal Use Only - 214 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 215 C4133 Capacitor,Ceramic, 55TO+85C 1608 R/TP 0.8+/-0.1 L:1.6+-0.1 W:0.8+- C4137 EAE62969601 Chip 0.1 T:0.8+-0.1 SAMSUNG ELECTRO-MECHANICS C4139 CO., LTD. LGE Internal Use Only - 215 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 216 MANUFACTURING CO.,LTD. C4113 C4145 C4147 C5102 C8100 C9504 MCR01MZP5J222 2.2KOHM 5% 1/16W 1005 R/TP - R8109 Resistor,Chip ERHZ0000443 ROHM. LGE Internal Use Only - 216 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 217 MECHANICS CO., LTD. R1302 RC0603F270CS 27OHM 1% 1/20W 0603 R/TP - R1303 Resistor,Chip EBC62456701 SAMSUNG ELECTRO-MECHANICS CO., LTD. R3312 LGE Internal Use Only - 217 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 218 12. EXPLODED VIEW & REPLACEMENT PART LIST Level Location no Description Specification Remark LG HK 0603 2N7S-T 2.7NH 0.3NH - 340mA - - L1104 Inductor,Multilayer, EAP62245901 0.21OHM 7.7GHZ 5 SHIELD - 0.6X0.3X0.3MM R/TP L1312 Chip TAIYO YUDEN CO.,LTD BQ25040 BQ25040 BQ25040,DFN ,10 ,R/TP ,Cal...
Page 219 L4130 Inductor,Wire EAP62527301 0.053OHM - - SHIELD 2.0X1.6X1.0MM - R/TP TDK L4132 Wound,Chip KOREA COOPERATION LG HK 0603 18NJ-T 18NH 5% - 180mA - - 0.71OHM Inductor,Multilayer, L1302 EAP62227901 2.3GHZ 5 SHIELD - 0.6X0.3X0.3MM R/TP TAIYO Chip YUDEN CO.,LTD B8515 942.5MHz 927.4to957.6MHz 897.5MHz...
Page 220 LL1005-FHL6N8J 6.8NH 5% - 300mA - - 0.23OHM Inductor,Multilayer, C5101 ELCH0001408 5.6GHZ 9 SHIELD NONE 1.0X0.5X0.5MM R/TP Chip TOKO, INC. LGE Internal Use Only - 220 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 221 HK1005 3N3S-T 3.3NH 0.3NH - 300mA 0.16OHM Inductor,Multilayer, C5106 ELCH0001034 6GHZ 8 SHIELD NONE 1.0X0.5X0.5MM R/TP Chip TAIYO YUDEN CO.,LTD LGE Internal Use Only - 221 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...
Page 222 MECHANICS CO., LTD. C2309 RC0201JR-0736RL 36OHM 5% 1/20W 0603 R/TP - R1304 Resistor,Chip ERHY0024501 YAGEO CORPORATION LG HK0603 82NJ-T 82NH 5% - 70mA - - 3.37OHM Inductor,Multilayer, C1104 EAP61866701 1GHZ 4 SHIELD 0 0.6X0.3X0.3MM R/TP TAIYO Chip YUDEN CO.,LTD LG HK 0603 3N9S-T 3.9NH 0.3NH - 300mA - -...
Page 223 L1103 Inductor,Multilayer, EAP61866901 0.15OHM 6GHZ 14 SHIELD 0 0.6X0.3X0.3MM R/TP L1500 Chip MURATA MANUFACTURING CO.,LTD. LG HK 0603 12NJ-T 12NH 5% - 190mA - - 0.68OHM L1108 Inductor,Multilayer, EAP62227801 2.7GHZ 5 SHIELD - 0.6X0.3X0.3MM R/TP TAIYO L1112 Chip YUDEN CO.,LTD MCR01MZP5F5101 5.1KOHM 1% 1/16W 1005 R/TP...
Page 224 MT6572 , QFN 5x5x0.9, Integrated 2.4GHz Balun & U5100 IC,WiFi EAN62909001 BPF, diplexer(GPS+BT/FM) QFN R/TP 41P MEDIATEK INC. LG HK 0603 5N6S-T 5.6NH 0.3NH - 260mA - - Inductor,Multilayer, L1101 EAP62227501 0.36OHM 4.6GHZ 5 SHIELD - 0.6X0.3X0.3MM R/TP Chip TAIYO YUDEN CO.,LTD GRM0335C1ER50C 0.5pF 0.25PF 25V X7R -...
Page 225 ERHZ0000308 - ROHM. MCR006YZPJ104 100KOHM 5% 1/20W 0603 R/TP R9028 Resistor,Chip ERHY0009506 - ROHM. LG HK 0603 39NJ-T 39NH 5% - 100mA - - 1.72OHM Inductor,Multilayer, L1109 EAP62228101 1.5GHZ 4 SHIELD - 0.6X0.3X0.3MM R/TP TAIYO Chip YUDEN CO.,LTD LGE Internal Use Only - 225 - Copyright ©...
Page 226 B8575 2140.0MHz 2110.0to2170.0MHz 1950.0MHz 1920.0to1980.0MHz 1.70/2.10dB 1.50/2.00dB FL1301 Filter,Duplexer EAM62930901 2.0x1.6x0.47t DUAL SMD R/TP 9P EPCOS PTE LTD. LG HK 0603 3N3S-T 3.3NH 0.3NH - 320mA - - Inductor,Multilayer, L1308 EAP62246001 0.23OHM 6.7GHZ 5 SHIELD - 0.6X0.3X0.3MM R/TP Chip TAIYO YUDEN CO.,LTD...
Page 227 MCS-02ED_EAC 90Vac~264Vac 4.75Vdc~5.25Vdv EAY060000 Adapters EAY62709906 850mA 50/60Hz CE WALL 2P USB - DONG DO ELECTRONICS CO., LTD LGE Internal Use Only - 227 - Copyright © 2014 LG Electronics. Inc. All right reserved. Only for training and service purposes...

LG -D120 Service Manual

1 Introduction

2 Performance

3 Trouble Shooting

4 Download

5 Block Diagram

6 Circuit Diagram

7 Bga Pin Map

8 Pcb Layout

9 Calibration

10 Hidden Menu

11 Disassemble Guide

12 Exploded View & Replacement Part List

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Summary of Contents for LG LG-D120

Table of Contents