LG E475F Service Manual

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Table Of Contents 1. INTRODUCTION ..................................................................... 3 1.1 Purpose ........................................................................................................3 1.2 Regulatory Information .........................................................................3 2. PERFORMANCE ...................................................................... 5 2.1 Product Name ............................................................................................5 2.2 Supporting Standard ..............................................................................5 2.3 Main Parts : GSM Solution .....................................................................5 2.4 HW Features ...............................................................................................6 2.5 SW Features ............................................................................................. 11 2.6 HW SPEC. ................................................................................................. 15 3. TROUBLE SHOOTING ..........................................................23 3.1 RF Component .......................................................................................23 3.2 SIGNAL PATH ...........................................................................................24 3.3 Checking TCXO Block ...........................................................................27 3.4 Checking GSM TX Module(GSM PAM + ASM) Block ...............29 3.5 Checking WCDMA Block ....................................................................32 3.6 Checking GSM Block ............................................................................42 3.7 GPS/WIFI/BT RF Component ............................................................49 3.8 GPS/WIFI/BT SIGNAL PATH ................................................................51 3.9 GPS/WIFI/BT Trouble shooting ........................................................53 3.10 Power ON Trouble Shooting...........................................................59 3.11 Charging Trouble Shooting ............................................................62 3.12 2M FF Camera Trouble Shooting ..................................................64 3.13 Main LCD trouble ................................................................................67 3.14 Proximity Sensor on/off Trouble Shooting ...............................69 3.15 Motion Sensor on/off Trouble Shooting ...................................71 3.16 DC Motor Trouble Shooting ...........................................................73 3.17 SIM detect Trouble Shooting .........................................................75 3.18 Audio Troble ..........................................................................................80 4. DOWNLOAD .........................................................................96 5. BLOCK DIAGRAM ..............................................................113 6. CIRCUIT DIAGRAM ............................................................118 7. BGA PIN MAP .....................................................................127 8. PCB LAYOUT .......................................................................133 9. CALIBRATION .....................................................................135 10. HIDDEN MENU .................................................................154 11. DISASSEMBLE GUIDE .................................................160 12. EXPLODED VIEW & REPLACEMENT PART LIST .............168

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 1. INTRODUCTION LGE Internal Use Only 1.1 Purpose This manual provides the information necessary to repair, calibration, description and download the features of this model. 1.2 Regulatory Information A. Security Toll fraud, the unauthorized use of telecommunications system by an unauthorized part (for example, persons other than your company’s employees, agents, subcontractors, or person working on your company’s behalf) can result in substantial additional charges for your telecommunications services. System users are responsible for the security of own system. There are may be risks of toll fraud associated with your telecommunications system. System users are responsible for programming and configuring the equipment to prevent unauthorized use. The manufacturer does not warrant that this product is immune from the above case but will prevent unauthorized use of common carrier telecommunication service of facilities accessed through or connected to it. The manufacturer will not be responsible for any charges that result from such unauthorized use. B. Incidence of Harm If a telephone company determines that the equipment provided to customer is faulty and possibly causing harm or interruption in service to the telephone network, it should disconnect telephone service until repair can be done. A telephone company may temporarily disconnect service as long as repair is not done. C. Changes in Service A local telephone company may make changes in its communications facilities or procedure. If these changes could reasonably be expected to affect the use of the phones or compatibility with the net work, the telephone company is required to give advanced written notice to the user, allowing the user to take appropriate steps to maintain telephone service. D. Maintenance Limitations Maintenance limitations on the phones must be performed only by the manufacturer or its authorized agent. The user may not make any changes and/or repairs expect as specifically noted in this manual. Therefore, note that unauthorized alternations or repair may affect the regulatory status of the system and may void any remaining warranty. 1. INTRODUCTION

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 1. INTRODUCTION LGE Internal Use Only E. Notice of Radiated Emissions This model complies with rules regarding radiation and radio frequency emission as defined by local regulatory agencies. In accordance with these agencies, you may be required to provide information such as the following to the end user. F. Pictures The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly different. G. Interference and Attenuation A phone may interfere with sensitive laboratory equipment, medical equipment, etc. Interference from unsuppressed engines or electric motors may cause problems. H. Electrostatic Sensitive Devices ATTENTION Boards, which contain Electrostatic Sensitive Device (ESD), are indicated by the sign. Following information is ESD handling: • Service personnel should ground themselves by using a wrist strap when exchange system boards. • When repairs are made to a system board, they should spread the floor with anti-static mat which is also grounded. • Use a suitable, grounded soldering iron. • Keep sensitive parts in these protective packages until these are used. • When returning system boards or parts like EEPROM to the factory, use the protective package as described.

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only 2.1 Product Name LG-E475f : WCDMA850/2100+EGSM/GSM850/DCS/PCS (HSUPA5.6Mbps/HSDPA 7.2Mbps / GPRS Class 12 / EDGE Class 12) 2.2 Supporting Standard Item Feature Comment Supporting Standard WCDMA(FDD1,5)/EGSM/GSM850/DCS1800/ PCS1900 with seamless handover Phase 2+(include AMR) Frequency Range WCDMA(FDD1) TX : 1920 - 1980 MHz WCDMA(FDD1) RX : 2110 - 2170 MHz WCDMA(FDD5) TX : 824 - 849 MHz WCDMA(FDD5) RX : 869 – 894 MHz EGSM TX : 880 – 915 MHz EGSM RX : 925 – 960 MHz GSM850 TX : 824 – 849 MHz GSM850 RX : 869 – 894 MHz DCS1800 TX : 1710 – 1785 MHz DCS1800 RX : 1805 – 1880 MHz PCS1900 TX : 1850 – 1910 MHz PCS1900 RX : 1930 – 1990 MHz Application Standard Android OS 2.3 Main Parts : GSM Solution Item Part Name Comment Digital Baseband MSM7225A: Qualcomm Analog Baseband PM8029 : Qualcomm RF Chip RTR6285A : Qualcomm LGE Internal Use Only 2.1 Product Name LG-E475f : WCDMA850/2100+EGSM/GSM850/DCS/PCS (HSUPA5.6Mbps/HSDPA 7.2Mbps / GPRS Class 12 / EDGE Class 12) 2.2 Supporting Standard Item Feature Comment Supporting Standard WCDMA(FDD1,5)/EGSM/GSM850/DCS1800/ PCS1900 with seamless handover Phase 2+(include AMR) Frequency Range WCDMA(FDD1) TX : 1920 - 1980 MHz WCDMA(FDD1) RX : 2110 - 2170 MHz WCDMA(FDD5) TX : 824 - 849 MHz WCDMA(FDD5) RX : 869 – 894 MHz EGSM TX : 880 – 915 MHz EGSM RX : 925 – 960 MHz GSM850 TX : 824 – 849 MHz GSM850 RX : 869 – 894 MHz DCS1800 TX : 1710 – 1785 MHz DCS1800 RX : 1805 – 1880 MHz PCS1900 TX : 1850 – 1910 MHz PCS1900 RX : 1930 – 1990 MHz Application Standard Android OS 2.3 Main Parts : GSM Solution Item Part Name Comment Digital Baseband MSM7225A: Qualcomm Analog Baseband PM8029 : Qualcomm RF Chip RTR6285A : Qualcomm 2. PERFORMANCE 2.1 Product Name LG-E475f : WCDMA850/2100+EGSM/GSM850/DCS/PCS (HSUPA5.6Mbps/HSDPA 7.2Mbps / GPRS Class 12 / EDGE Class 12) 2.2 Supporting Standard 2.3 Main Parts : GSM Solution

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only 2.4 HW Features Item Feature Comment Form Factor DOP type Battery 1) Capacity Standard : Li-Ion Polymer, 1540mAh 2) Packing Type : Soft Pack Size Standard : 103.5 x 58.9 x 13.4mm Weight 107g With Battery RX sensitivity WCDMA(FDD1) : -106.7 dBm WCDMA(FDD5) : -107 dBm EGSM : -107 dBm GSM850 : -107 dBm DCS 1800 : -107 dBm PCS 1900 : -107 dBm TX output power WCDMA/ GSM/ GPRS WCDMA : 22.5dBm/3.84MHz,+1/- 3dBm EGSM : 32.5dBm GSM850 : 32.5 dBm DCS1800 : 29.5 dBm PCS 1900: 29.5 dBm EDGE compatibility EDGE Class 12 Rx only Power class GSM/GPRS/ WCDMA Class3(WCDMA) Class4 (EGSM) Class4 (GSM850) Class1 (PCS) Class1 (DCS) EDGE Class 12 Rx only E2 (GSM900) E2 (PCS) E2 (DCS) Display Main LCD QVGA Main LCD(3.0 inch, 320 x 240 ) 2.4 HW Features

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only Built-in Camera 2M CMOS Camera Status Indicator Yes Keypad Full Touch Screen Side Key : 3 Side Key : Power On Volume up/down ANT Main : Internal Fixed Type System connector 5 Pin u-USB Ear Phone Jack 3.5 pi type PC synchronization Yes Memory eMMC : 4GB LPDDR1 : 4Gb Speech coding FR, EFR, HR,AMR Vibrator Built in Vibrator Blue Tooth Bluetooth 3.0+EDR MIDI(for Buzzer Function) SW Decoded 72Poly Music Player MP3/WMA/AAC/MIDI/EAAC+/HE AAC/OGG Video Player MPEG4, H.264 Camcorder MPEG4 or H.263 Voice Recording Yes Speaker Phone mode Support Yes Travel Adapter Yes CDROM No Stereo Headset Yes Data Cable Yes T-Flash (External Memory) Yes ( Up to 32GB )

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only 1) RSSI Display BAR WCDMA mode GSM mode 5 Over -85 ±2dBm Over -91 ±2dBm 54 -86 ±2dBm -91 ±2dBm 43 -92 ±2dBm -96 ±2dBm 32 -98 ±2dBm -99 ±2dBm 21 -102±2dBm -103 ±2dBm 10 -106 ±2dBm -105 ±2dBm Measure RSSI after 10 seconds if you change power. 2) Charging Time 210 minutes under 3) Travel Charger Input : 100 ~ 240 V, 50/60 Hz Output : 5.1V, 700 mA 4) Battery Type Li-ion Battery Pack, 1540 mAh Standard Voltage : 3.7 V, Battery Full Charge Voltage : 4.1V ~ 4.2V Measure RSSI after 10 seconds if you change power. 2) Charging Time 210 minutes under 3) Travel Charger Input : 100 ~ 240 V, 50/60 Hz Output : 5.1V, 700 mA 4) Battery Type Li-ion Battery Pack, 1540 mAh Standard Voltage : 3.7 V, Battery Full Charge Voltage : 4.1V ~ 4.2V 1) RSSI Display

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only 5) Current Consumption Stand by Voice Call Measurement Condition Bluetooth Off Bluetooth Connected WCDMA+GSM 7 mA under, =214 hours over (DRX=7, PP=5 ) 10 mA under =150 hours over (DRX=7, PP=5) 300mA under =300 min over (Tx=12dBm) LCD Backlight off GSM+GSM 4.5 mA under =333 hours over (PP5, PP=5) 7.5 mA under =200 hours over (PP5, PP=5) 330mA under =270 min over (Tx=Max) LCD Backlight off WCDMA only 3.0 mA under =500 hours over (DRX=7) 6 mA under =250 hours over (DRX=7) 300mA under =300 min over (Tx=12dBm) Measure standby current after 10 minutes after backlight off. 6) Battery Bar Battery Bar Specification Unit Battery Bar Specification Unit BAR 20 (Full) OVER 98% Soc % BAR 9 -> 8 43%  42% Soc % BAR 20 -> 19 98%  97% BAR 8 -> 7 38%  37% BAR 19 -> 18 93%  92% BAR 7 -> 6 33%  32% BAR 18 -> 17 88%  87% BAR 6 -> 5 28%  27% BAR 17 -> 16 83%  82% BAR 5 -> 4 23%  22% BAR 16 -> 15 78%  77% BAR 4 -> 3 18%  17% BAR 15 -> 14 73%  72% BAR 3 -> 2 13%  12% BAR 14 -> 13 68%  67% BAR 2 -> 1 8%  7% BAR 13 -> 12 63%  62% BAR 1 -> 0 3%  2% BAR 12 -> 11 58%  57% Low Battery Pop- up 4% ~ 15% : One Time popup (No call) BAR 11 -> 10 53%  52% Critical Low Battery Pop-up 0% ~ 3% : Every Level change popup (No call) BAR 10 -> 9 48%  47% POWER OFF Below 1% 5) Current Consumption

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only GSM+GSM 4.5 mA under =333 hours over (PP5, PP=5) 7.5 mA under =200 hours over (PP5, PP=5) 330mA under =270 min over (Tx=Max) LCD Backlight off WCDMA only 3.0 mA under =500 hours over (DRX=7) 6 mA under =250 hours over (DRX=7) 300mA under =300 min over (Tx=12dBm) Measure standby current after 10 minutes after backlight off. 6) Battery Bar Battery Bar Specification Unit Battery Bar Specification Unit BAR 20 (Full) OVER 98% Soc % BAR 9 -> 8 43%  42% Soc % BAR 20 -> 19 98%  97% BAR 8 -> 7 38%  37% BAR 19 -> 18 93%  92% BAR 7 -> 6 33%  32% BAR 18 -> 17 88%  87% BAR 6 -> 5 28%  27% BAR 17 -> 16 83%  82% BAR 5 -> 4 23%  22% BAR 16 -> 15 78%  77% BAR 4 -> 3 18%  17% BAR 15 -> 14 73%  72% BAR 3 -> 2 13%  12% BAR 14 -> 13 68%  67% BAR 2 -> 1 8%  7% BAR 13 -> 12 63%  62% BAR 1 -> 0 3%  2% BAR 12 -> 11 58%  57% Low Battery Pop- up 4% ~ 15% : One Time popup (No call) BAR 11 -> 10 53%  52% Critical Low Battery Pop-up 0% ~ 3% : Every Level change popup (No call) BAR 10 -> 9 48%  47% POWER OFF Below 1% 6) Battery Bar

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only 2.5 SW Features Item Feature Comment RSSI 0 ~ 5 Levels Battery Charging 0 ~ 20 Levels Key Volume 0 ~ 7 Level Audio Volume 0 ~ 7 Level Time / Date Display Yes Multi-Language Yes English/French/German/Spanish/Italia n/Danish/Dutch/Korean Quick Access Mode Dialing/ Contact /Message/Menu The user can edit as desired icon. (Menu icon excluded) Icon on the menu is the LONG-PRESS. DRAG icon to where you want to register. PC Sync Yes Speed Dial Yes Profile Yes not same with feature phone setting CLIP / CLIR Yes Phone Book Name / Number / Email / Website/Postal addresses/Organizations/Groups/ Birthday / Ringtone There is no limitation on the number of items. It depends on available memory amount. Ringtone can be specified in the detail view screen. Last Dial Number Yes Last Dial Numbers, Last Received Numbers and Last Missed Numbers can store up to a total of 500. Last Received Number Yes Last Dial Numbers, Last Received Numbers and Last Missed Numbers can store up to a total of 500. Last Missed Number Yes Last Dial Numbers, Last Received Numbers and Last Missed Numbers can store up to a total of 500. 2.5 SW Features

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only Search by Number / Name Name Group Yes There is no limitation on the number of items. It depends on available memory amount. Fixed Dial Number Yes Service Dial Number No Own Number Yes Read only (add/edit/delete are not supported) Voice Memo Yes Call Reminder No Network Selection Automatic Mute Yes Call Divert Yes Call Barring Yes Call Charge (AoC) Yes Call Duration Yes SMS (EMS) There is no limitation on the number of items. It depends on available memory amount. EMS does not support. SMS Over GPRS No EMS Melody / Picture No Send / Receive / Save No MMS MPEG4 Send / Receive / Save Yes Long Message MAX 2000 characters Cell Broadcast Yes Download Over the Web Game No

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only Calendar Yes Memo No World Clock No Unit Convert No Stop Watch No Wall Paper Yes WAP Browser No Support only web browser based on webkit. WAP stack and wml are not supported. Download Melody / Wallpaper Yes Over web browser SIM Lock No SIM Toolkit Class 1, 2, 3, C MMS Yes Google MMS Client EONS Yes CPHS Yes V4.2 ENS No Camera Yes 2M FF / Digital Zoom : x4 JAVA No Voice Dial No IrDa No Bluetooth Yes Ver. 3.0 FM radio Yes GPRS Yes Class 12 EDGE Yes Class 12 Rx only Hold / Retrieve Yes

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only Conference Call Yes Max. 6 DTMF Yes Memo pad No TTY No AMR Yes SyncML Yes IM No Email Yes

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only 2.6 HW SPEC. 1) GSM transceiver specification Item Specification Phase Error Rms : 5° Peak : 20 ° Frequency Error GSM : 0.1 ppm DCS/PCS : 0.1 ppm EMC(Radiated Spurious Emission Disturbance) GSM/DCS : < -28dBm Transmitter Output power and Burst Timing GSM : 5dBm – 33dBm ± 3dB DCS/PCS : 0dBm – 30dBm ± 3dB Burst Timing <3.69us Spectrum due to modulation out to less than 1800kHz offset 200kHz : -36dBm 600kHz : -51dBm/-56dBm Spectrum due to modulation out to larger than 1800kHz offset to the edge of the transmit band GSM : 1800-3000kHz :< -63dBc(-46dBm) 3000kHz-6000kHz : <-65dBc(-46dBm) 6000kHz < : < -71dBc(-46dBm) DCS : 1800-3000kHz :< -65dBc(-51dBm) 6000kHz < : < -73dBc(-51dBm) Spectrum due to switching transient 400kHz : -19dBm/-22dBm(5/0), -23dBm 600kHz : -21dBm/-24dBm(5/0), -26dBm Reference Sensitivity – TCH/FS Class II(RBER) : -105dBm(2.439%) Usable receiver input level range 0.012(-15 - -40dBm) Intermodulation rejection – Speech channels ± 800kHz, ± 1600kHz : -98dBm/-96dBm (2.439%) AM Suppression - GSM : -31dBm - DCS : -29dBm -98dBm/-96dBm (2.439%) Timing Advance ± 0.5T 2.6 HW SPEC. 1) GSM transceiver specification

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only 2) WCDMA transmitter specification Item Specification Transmit Frequency Band1 : 1920 MHz ~ 1980 MHz Band5 : 824 ~ 849 MHz Maximum Output Power +24 dBm / 3.84 MHz, +1 / -3 dB Frequency Error within ±0.1 PPM Open Loop Power Control Normal Conditions : within ±9 dB, Extreme Conditions : within ±12 dB Minimum Transmit Power < -50 dBm /3.84 MHz Occupied Bandwidth < 5 MHz at 3.84 Mcps (99% of power) Adjacent Channel Leakage Power Ratio (ACLR) > 33 dB @ ±5 MHz, > 43 dB @ ±10 MHz Spurious Emissions |f-fc| > 12.5 MHz < -36 dBm / 1 kHz RW @ 9 kHz ≤ f < 150 kHz < -36 dBm / 10 kHz RW @ 150 KHz ≤ f < 30 MHz < -36 dBm / 100 kHz RW @ 30 MHz ≤ f < 1 GHz < -30 dBm / 1 MHz RW @ 1 GHz ≤ f < 12.75 GHz < -60 dBm / 3.84 MHz RW @ 869 MHz ≤ f ≤ 894 MHz < -60 dBm / 3.84 MHz RW @ 1930 MHz ≤ f ≤ 1900 MHz < -60 dBm / 3.84 MHz RW @ 2110 MHz ≤ f ≤ 2155 MHz < -67 dBm / 100 kHz RW @ 925 MHz ≤ f ≤ 935 MHz < -79 dBm / 100 kHz RW @ 935 MHz < f ≤ 960 GHz < -71 dBm / 100 kHz RW @ 1805 MHz ≤ f ≤ 1880 MHz < -41 dBm / 300 kHz RW @ 1884.5 MHz < f < 1919.6 MHz Transmit Intermodulation < -31 dBc @ 5 MHz & < -41 dBc @ 10 MHz when Interference CW Signal Level = -40 dBc Error Vector Magnitude < 17.5 %, when Pout ≥ -20 dBm Peak Code Domain Error < -15 dB at Pout ≥ -20 dBm 2) WCDMA transmitter specification

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only 3) WCDMA receiver specification Item Specification Receive Frequency Band1: 2110MHz ~ 2170 MHz Band 5 : 869 – 894 MHz Reference Sensitivity Level Band1 : BER < 0.001 when Îor = -106.7 dBm / 3.84 MHz Band8 : BER < 0.001 when Îor = -106.7 dBm / 3.84 MHz Maximum Input Level BER < 0.001 when Îor = -25 dBm / 3.84 MHz Adjacent Channel Selectivity (ACS) ACS > 33 dB where BER < 0.001 when Îor = -92.7 dBm / 3.84 MHz & Ioac = –52 dBm / 3.84 MHz @ ±5 MHz Blocking Characteristic BER < 0.001 when Îor = -103.7 dBm / 3.84 MHz & Iblocking = -56 dBm / 3.84 MHz @ Fuw(offset) = ±10 MHz or Iblocking = -44 dBm / 3.84 MHz @ Fuw(offset) = ±15 MHz Spurious Response BER < 0.001 when Îor = -103.7 dBm / 3.84 MHz & Iblocking = -44 dBm Intermodulation BER < 0.001 when Îor= -103.7 dBm / 3.84 MHz & Iouw1 = -46 dBm @ Fuw1(offset) = ±10 MHz & Iouw2 = -46 dBm / 3.84 MHz @ Fuw2(offset) = ±20 MHz Spurious Emissions < -57 dBm / 100 kHz BW @ 9 kHz ≤ f < 1 GHz < -47 dBm / 1 MHz BW @ 1 GHz ≤ f ≤ 12.75 GHz Inner Loop Power Control In Uplink Adjust output(TPC command) cmd 1dB 2dB 3dB +1 +0.5/1.5 +1/3 +1.5/4 0 -0.5/+0.5 -0.5/+0.5 -0.5/+0.5 -1 -0.5/-1.5 -1/-3 -1.5/-4 group(10equal command group) +1 +8/+12 +16/+24 3) WCDMA receiver specification

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only 4) HSDPA transmitter specification Item Specification Transmit Frequency Band1 : 1920 MHz ~ 1980 MHz Band5 : 824MHz ~ 849MHz Maximum Output Power Sub-Test 1=1/15, 2=12/15 21~25dBm / 3.84 MHz 3=13/15 4=15/8 20~25dBm / 3.84 MHz 5=15/7 6=15/0 19~25dBm / 3.84 MHz HS-DPCCH Sub- test in table C.10.1.4 Power step Power step slot boundary Power step size, P [dB] Transmitter power step tolerance [dB] 5 1 Start of Ack/Nack 6 +/- 2.3 2 Start of CQI 1 +/- 0.6 3 Middle of CQI 0 +/- 0.6 4 End of CQI 5 +/- 2.3 Spectrum Emission Mask Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0 Frequency offset from carrier △f Minimum requirement Measurement Bandwidth 2.5 ~ 3.5 MHz -35-15×(△f-2.5)dBc 30 kHz 3.5 ~ 7.5 MHz -35-1×(△f-3.5)dBc 1 MHz 7.5 ~ 8.5 MHz -35-10×(△f-7.5)dBc 1 MHz 8.5 ~ 12.5 MHz -49dBc 1 MHz Adjacent Channel Leakage Power Ratio (ACLR) Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0 > 33 dB @ ±5 MHz > 43 dB @ ±10 MHz Error Vector Magnitude < 17.5 %, when Pout ≥ -20 dBm 4) HSDPA transmitter specification

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only 5) HSDPA receiver specification Item Specification Receive Frequency Band1: 1920MHz ~ 2170 MHz Band5 : 869MHz ~ 894MHz Maximum Input Level (BLER or R), 16QAM Only Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0 BLER < 10% or R >= 700kbps 6) WLAN 802.11b transceiver specification Item Specification Transmit Frequency 2400 MHz ~ 2483.5 MHz ( CH1~CH13 ) Tx Power Level ≤ 20dBm under Frequency Tolerance within ±25 PPM Chip clock Frequency Tolerance within ±25 PPM Spectrum Mask ≤ -30 @ fc-22MHz< f fc+22MHz Power ramp on/off time ≤ 2us Carrier Suppression ≤ -15dB Modulation Accuracy (Peak EVM) ≤ 35% Spurious Emissions < -36 dBm @ 30MHz ~ 1GHz < -30 dBm above @ 1GHz ~ 12.75GHz < -47 dBm @ 1.8GHz ~ 1.9GHz < -47 dBm @ 5.15GHz ~ 5.3GHz Rx Min input Sensitivity ≤ -85dBm(1Mbps,2Mbps,5.5Mbps,11Mbps) @ FER ≤ 8% Rx Max input Sensitivity ≥ -10dBm(1Mbps,2Mbps,5.5Mbps,11Mbps) @ FER ≤ 8% Rx Adjacent Channel Rejection ≥ 35dB @FER ≤ 8%, interference input signal -70dBm@fc±25MHz(11Mbps) LGE Internal Use Only 5) HSDPA receiver specification Item Specification Receive Frequency Band1: 1920MHz ~ 2170 MHz Band5 : 869MHz ~ 894MHz Maximum Input Level (BLER or R), 16QAM Only Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0 BLER < 10% or R >= 700kbps 6) WLAN 802.11b transceiver specification Item Specification Transmit Frequency 2400 MHz ~ 2483.5 MHz ( CH1~CH13 ) Tx Power Level ≤ 20dBm under Frequency Tolerance within ±25 PPM Chip clock Frequency Tolerance within ±25 PPM Spectrum Mask ≤ -30 @ fc-22MHz< f fc+22MHz Power ramp on/off time ≤ 2us Carrier Suppression ≤ -15dB Modulation Accuracy (Peak EVM) ≤ 35% Spurious Emissions < -36 dBm @ 30MHz ~ 1GHz < -30 dBm above @ 1GHz ~ 12.75GHz < -47 dBm @ 1.8GHz ~ 1.9GHz < -47 dBm @ 5.15GHz ~ 5.3GHz Rx Min input Sensitivity ≤ -85dBm(1Mbps,2Mbps,5.5Mbps,11Mbps) @ FER ≤ 8% Rx Max input Sensitivity ≥ -10dBm(1Mbps,2Mbps,5.5Mbps,11Mbps) @ FER ≤ 8% Rx Adjacent Channel Rejection ≥ 35dB @FER ≤ 8%, interference input signal -70dBm@fc±25MHz(11Mbps) 5) HSDPA receiver specification 6) WLAN 802.11b transceiver specification

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only 7) WLAN 802.11g transceiver specification Item Specification Transmit Frequency 2400 MHz ~ 2483.5 MHz ( CH1~CH13 ) Tx Power Level ≤ 20dBm Frequency Tolerance within ±25 PPM Chip clock Frequency Tolerance within ±25 PPM Spectrum Mask ≤ -20 @ ±11MHz offset (9Mhz ~ 11MHz) ≤ -28 @ ±20MHz offset (11MHz ~ 20Mhz) ≤ -40 @ ±30MHz offset (20MHz ~ 30Mhz) Transmitter constellation error (rms EVM) ≤ -5dB Spurious Emissions < -36 dBm @ 30MHz ~ 1GHz < -30 dBm above @ 1GHz ~ 12.75GHz < -47 dBm @ 1.8GHz ~ 1.9GHz < -47 dBm @ 5.15GHz ~ 5.3GHz Rx Min input Sensitivity PER ≤ 10% -82dBm@6Mbps, -81dBm@9Mbps, -79dBm@12Mbps -77dBm@18Mbps, -74dBm@24Mbps, -70dBm@36Mbps -66dBm@48Mbps, -65dBm@54Mbps Rx Max input Sensitivity ≥ -20dBm(6,9,12,18,24,36,48,54Mbps) @ PER ≤ 10% Rx Adjacent Channel Rejection PER ≤ 10%, ACR ≥ 16dB@6Mbps, ACR ≥ 15dB@9Mbps, ACR ≥ 13dB@12Mbps, ACR ≥ 11dB@18Mbps, ACR ≥ 8dB@24Mbps, ACR ≥ 4dB@36Mbps ACR ≥ 0dB@48Mbps, ACR ≥ -1dB@54Mbps ※ACR shall be measured by setting the desired signal's strength 3 dB above the rate-dependent sensitivity specified in min input sensitivity 7) WLAN 802.11g transceiver specification

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only 8) WLAN 802.11n transceiver specification Item Specification Transmit Frequency 2400 MHz ~ 2483.5 MHz ( CH1~CH13 ) Tx Power Level ≤ 20dBm Frequency Tolerance within ±25 PPM Chip clock Frequency Tolerance within ±25 PPM Spectrum Mask ≤ -20 @ ±11MHz offset (9Mhz ~ 11MHz) ≤ -28 @ ±20MHz offset (11MHz ~ 20Mhz) ≤ -45 @ ±30MHz offset (20MHz ~ 30Mhz) Transmitter constellation error (rms EVM) ≤ -5dB Spurious Emissions < -36 dBm @ 30MHz ~ 1GHz < -30 dBm above @ 1GHz ~ 12.75GHz < -47 dBm @ 1.8GHz ~ 1.9GHz < -47 dBm @ 5.15GHz ~ 5.3GHz Rx Min input Sensitivity PER ≤ 10% [email protected], -79dBm@13Mbps, [email protected] -74dBm@26Mbps, -70dBm@39Mbps, -66dBm@52Mbps [email protected], -64dBm@65Mbps Rx Max input Sensitivity ≥ -20dBm(6,9,12,18,24,36,48,54Mbps) @ PER ≤ 10% Rx Adjacent Channel Rejection PER ≤ 10%, ACR ≥ [email protected], ACR ≥ 13dB@13Mbps, ACR ≥ [email protected], ACR ≥ 8dB@26Mbps, ACR ≥ 4dB@39Mbps, ACR ≥ 0dB@52Mbps ACR ≥ [email protected], ACR ≥ -2dB@65Mbps ※ACR shall be measured by setting the desired signal's strength 3 dB above the rate-dependent sensitivity specified in min input sensitivity 8) WLAN 802.11n transceiver specification

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only 9) GPS receiver specification Item Specification Receive Frequency 1574.42 MHz ~ 1576.42 MHz Minimum Sensitivity 1 satellite ≥-142dBm, 7 satellites ≥ -147dBm at coarse time aiding 9) GPS receiver specification

- 23 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3. TROUBLE SHOOTING 3.1 RF Component Reference Description Reference Description U1000 RTR6285A(Transceiver) FL1007 WCDMA (V) Duplexer U1001 GSM TX Module (ASM+GSM PAM) FL1003 WCDMA (I) RX SAW Filter U1002 WCDMA (I) PAM FL1001 EGSM/850 Rx saw filter U1003 WCDMA (V) PAM FL1002 DCS/PCS Rx saw filter FL1004 WCDMA (I) TX SAW Filter X2000 VCTCXO(19.2MHz) FL1006 WCDMA (I) Duplexer SW1000 RF Antenna Connector FL1008 WCDMA (V) TX SAW Filter RF component (WCDMA / GSM) X2000 VCTCXO U1000 RF Transceiver FL1003 W2100 Rx SAW FL1004 W2100 Tx SAW U1002 W2100 PAM FL1006 W2100 DPX FL1002 DCS/PCS Rx SAW FL1001 EGSM/850 Rx SAW U1001 GSM PAM +ASM U1003 W850 PAM FL1008 W850 Tx SAW SW1000 Mobile Switch FL1007 W850 DPX

- 24 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.2 SIGNAL PATH WCDMA I and V Band TX Signal PATH D2. WCDMA 2100 TX PATH E2. WCDMA 850 TX PATH F1. COMMON TX/RX PATH

- 25 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only WCDMA I and V Band RX Signal PATH D1. WCDMA 2100 RX PATH E1. WCDMA 850 RX PATH F1. COMMON TX/RX PATH

- 26 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only GSM850/GSM900/DCS/PCS’s RX/TX Signal PATH A. GSM850/GSM900/DCS1800/PCS1900 RX PATH B. GSM850/GSM900/DCS1800/PCS1900 TX PATH C1. COMMON TX/RX PATH

- 27 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.3 Checking TCXO Block The output frequency (19.2MHz) of TCXO (X2000) is used as the reference one of RTR6285 and PM8029 internal VCO. Schematic of the Crystal Part (19.2MHz) TP1 TP3 TP2 19.2MHZ X2000 X1G003581002700 VC VCC TP1 TP2 GND OUT 100 R2003 C2005 1n 10n C2009 C2017 1n 0.1u C2006 VREG_TCXO_2.85V TCXO_RTR_19.2MHZ TCXO_PM_19.2MHZ TRK_LO_ADJ TCXO Circuit Clesed to TCXO TP2 TP1 TP3

- 28 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Check TP1 VCC of TCXO VCC ≥ 2.8V Check PM8029 No Yes Check TP2 2.4V ≥ Voltage ≥ 0.4V Check MSM7225A No Yes Check TP3 19.2 MHz Signal Check soldering and components No Yes TCXO is OK

- 29 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.4 Checking GSM TX Module(GSM PAM + ASM) Block ANT_SEL2 ANT_SEL1 TX_EN ANT_SEL0 VBATT(TP1)

- 30 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Schematic of the Antenna Switch Block C1038 10u DNI C1125 VBAT U1001 16 15 14 13 12 11 10 17 9 8 7 6 4 3 28 1 44 43 42 41 40 39 38 37 36 35 32 33 34 24 23 22 29 30 31 18 21 25 20 26 19 27 5 2 GND2 GND5 GND13 TRX1 ANT TRX2 GND12 TRX3 VRAMP PGND3 PGND2 PGND1 GND10 TRX4 GND11 PGND6 PGND5 PGND4 PGND7 PGND8 PGND9 PGND10 PGND11 PGND12 PGND13 PGND14 PGND15 PGND16 GND1 GND14 GND3 GND4 GND6 GND7 GND8 TX_HB_IN TXEN TX_LB_IN BS2 BS1 VBATT VCC GND9 MODE C1039 100p 1 2 DNI C1124 130 R1012 2 1 R1011 47 2 1 130 R1013 R1008 91 2 1 R1007 91 75 R1006 1n C1118 1 2 C1201 DNI ANT_SEL2 ANT_SEL1 W1900_W2100_RTX W850_W900_RTX 11dB 7dB 2mm TP1

- 31 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Checking Switch Block Power Source Check ANT_SEL 0,1,2,3 High Level 1.2V < Voltage < 3V Check the TP1(VBATT) No Yes Check the Logic In each mode Antenna Switch Module logic(SKY77584) ANT_SEL 0 ANT_SEL 1 ANT_SEL 2 Tx_EN STAND-BY LOW LOW LOW LOW GTX_LB LOW LOW HIGH HIGH GTX_HB LOW HIGH HIGH HIGH GRX_LB HIGH LOW LOW LOW GRX_HB HIGH HIGH LOW LOW WTRX_HB HIGH LOW HIGH LOW WTRX_LB LOW HIGH LOW LOW

- 32 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.5 Checking WCDMA Block START 1. Check TCXO 19.2MHz 6. Ro-download SW & Cal. 2. Check Tx Module Block Refer to 1.4 3. Check RF Tx Level 5. Check RF Level 4. Check PAM Block Refer to 1.5.4

- 33 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.5.1 Checking TCXO Block Refer to 3.3 3.5.2 Checking Tx Module Block Refer to 3.4 3.5.3 Checking RF TX Level Test Point (TX Level) TP1 TP3 TP4 TP2

- 34 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only For testing, Max power output is needed. 100p C1001 DNI C1005 U1001 16 15 14 13 12 11 10 17 9 8 7 6 4 3 28 1 44 43 42 41 40 39 38 37 36 35 32 33 34 24 23 22 29 30 31 18 21 25 20 26 19 27 5 2 GND2 GND5 GND13 TRX1 ANT TRX2 GND12 TRX3 VRAMP PGND3 PGND2 PGND1 GND10 TRX4 GND11 PGND6 PGND5 PGND4 PGND7 PGND8 PGND9 PGND10 PGND11 PGND12 PGND13 PGND14 PGND15 PGND16 GND1 GND14 GND3 GND4 GND6 GND7 GND8 TX_HB_IN TXEN TX_LB_IN BS2 BS1 VBATT VCC GND9 MODE DNI C1004 C1002 6.8p C1003 DNI SW1000 4 3 2 1 ANT COMMON G3 G4 L1001 15n 100p C1007 W1900_W2100_RTX W850_W900_RTX TP1

- 35 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only RF Tx Level is OK Yes Check PAM Block Refer to 1.5.4 Check TX Module Yes No Check Duplexer Yes No Check RTR6285A Yes No No Check TP1 Over 21dBm? Check TP2 Over 21dBm? Check TP3 Over 21dBm? Check TP4 Over 7dBm? Check ANT_SEL 0,1,2 (High, Low, Low) RTR6285 Maximum output Power = 7 dBm RTR6285 minimum output Power = -80 dBm C1108 DNI U1003 6 5 7 4 8 3 9 2 10 1 11 PGND VCC1 VCC2 RFIN RFOUT VMODE_1 CPL_IN VMODE_0 GND VEN CPL_OUT U1002 6 5 7 4 8 3 9 2 10 1 11 PGND VCC1 VCC2 RFIN RFOUT VMODE_1 CPL_IN VMODE_0 GND VEN CPL_OUT FL1004 5 3 2 4 1 IN OUT G2 G1 G3 3.9n L1034 C1116 1.2p 2.7p L1029 C1117 DNI L1031 2.7p C1076 1.8p C1109 100p 100p C1110 100p L1022 49.9 R1022 51 R1017 1.2p L1021 C1085 2.7n C1112 0.5p 5.6n L1033 VBAT FL1007 7 5 8 4 9 2 3 1 6 ANT RX1 TX GND1 GND5 GND2 RX2 GND3 GND4 C1082 330p 100p C1094 VBAT C1097 680p 1 2 C1091 1p C1093 100p 10n C1089 R1019 110 R1018 110 C1095 680p 330p C1080 2.2u C1081 12n L1016 2.2u C1096 DNI C1104 C1101 1n 2.4n L1015 DNI C1107 33p L1102 22 R1020 220 R1026 220 R1024 1.8n C1111 C1090 100 C1088 100 22 C1087 22 L1023 15n C1103 1.8n L1020 FL1006 7 5 8 4 9 2 3 1 6 ANT RX TX GND1 GND6 GND2 GND5 GND3 GND4 FL1008 5 3 2 4 1 IN OUT G2 G1 G3 DNI C1200 PA_ON0 PA_R0 PA_R0 PA_ON1 RX_WCDMA_HB 3G_PAM_MODE 3G_PAM_MODE W850_W900_TX_OUT PDET_IN RX_WCDMA_900_P RX_WCDMA_900_M W1900_W2100_RTX W850_W900_RTX W1900_W2100_TX_OUT Band II WCDMA DUAL Band V 4dB attunation Close to pin1 8dB TP4 TP3 TP2

- 36 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.5.4 Checking PAM Block PAM Control Signal PA_ON0 (C1094), PA_ON1(C1110) : PAM Enable PA_R0: PAM Gain Control PA_ON must be HIGH (over 2.6V) PAM IN/OUT Signal : When PAM is under the operation of high power mode (PA_R0(C1093) : Low), PAM OUT power must be over 21 dBm PAM IN power must be under 10 dBm TP1 TP2 TP3

- 37 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Set the phone Tx is ON and PDM is 210 Check TP3 Over 21dBm? RF Tx Level is OK Yes No Change the board Check TP2 PA_R0 ≥ 2.6V Check MSM7225A Yes No Check TP1 Over 10 dBm? Check RTR6285A Yes No C1108 DNI U1003 6 5 7 4 8 3 9 2 10 1 11 PGND VCC1 VCC2 RFIN RFOUT VMODE_1 CPL_IN VMODE_0 GND VEN CPL_OUT U1002 6 5 7 4 8 3 9 2 10 1 11 PGND VCC1 VCC2 RFIN RFOUT VMODE_1 CPL_IN VMODE_0 GND VEN CPL_OUT FL1004 5 3 2 4 1 IN OUT G2 G1 G3 3.9n L1034 C1116 1.2p 2.7p L1029 C1117 DNI L1031 2.7p C1076 1.8p C1109 100p 100p C1110 100p L1022 49.9 R1022 51 R1017 1.2p L1021 C1085 2.7n C1112 0.5p 5.6n L1033 VBAT FL1007 7 5 8 4 9 2 3 1 6 ANT RX1 TX GND1 GND5 GND2 RX2 GND3 GND4 C1082 330p 100p C1094 VBAT C1097 680p 1 2 C1091 1p C1093 100p 10n C1089 R1019 110 R1018 110 C1095 680p 330p C1080 2.2u C1081 12n L1016 2.2u C1096 DNI C1104 C1101 1n 2.4n L1015 DNI C1107 33p L1102 22 R1020 220 R1026 220 R1024 1.8n C1111 C1090 100 C1088 100 22 C1087 22 L1023 15n C1103 1.8n L1020 FL1006 7 5 8 4 9 2 3 1 6 ANT RX TX GND1 GND6 GND2 GND5 GND3 GND4 FL1008 5 3 2 4 1 IN OUT G2 G1 G3 DNI C1200 PA_ON0 PA_R0 PA_R0 PA_ON1 RX_WCDMA_HB 3G_PAM_MODE 3G_PAM_MODE W850_W900_TX_OUT PDET_IN RX_WCDMA_900_P RX_WCDMA_900_M W1900_W2100_RTX W850_W900_RTX W1900_W2100_TX_OUT Band II WCDMA DUAL Band V 4dB attunation Close to pin1 8dB TP2 TP3 TP1

- 38 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.5.5 Checking RF Rx Level Test Point (RF Rx Level) Bias TP5 TP3 TP2 TP1

- 39 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 100p C1001 DNI C1005 U1001 16 15 14 13 12 11 10 17 9 8 7 6 4 3 28 1 44 43 42 41 40 39 38 37 36 35 32 33 34 24 23 22 29 30 31 18 21 25 20 26 19 27 5 2 GND2 GND5 GND13 TRX1 ANT TRX2 GND12 TRX3 VRAMP PGND3 PGND2 PGND1 GND10 TRX4 GND11 PGND6 PGND5 PGND4 PGND7 PGND8 PGND9 PGND10 PGND11 PGND12 PGND13 PGND14 PGND15 PGND16 GND1 GND14 GND3 GND4 GND6 GND7 GND8 TX_HB_IN TXEN TX_LB_IN BS2 BS1 VBATT VCC GND9 MODE HJ-ICT-06Y ANT1002 1 DNI C1004 C1127 1p C1002 6.8p C1003 DNI SW1000 4 3 2 1 ANT COMMON G3 G4 L1001 15n 2 1 C1007 1.8n W1900_W2100_RTX W850_W900_RTX TP1

- 40 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only C1108 DNI U1003 6 5 7 4 8 3 9 2 10 1 11 PGND VCC1 VCC2 RFIN RFOUT VMODE_1 CPL_IN VMODE_0 GND VEN CPL_OUT U1002 6 5 7 4 8 3 9 2 10 1 11 PGND VCC1 VCC2 RFIN RFOUT VMODE_1 CPL_IN VMODE_0 GND VEN CPL_OUT FL1004 5 3 2 4 1 IN OUT G2 G1 G3 3.9n L1034 C1116 1.2p 2.7p L1029 C1117 DNI L1031 2.7p C1076 1.8p C1109 100p 100p C1110 100p L1022 49.9 R1022 51 R1017 1.2p L1021 C1085 2.7n C1112 0.5p 5.6n L1033 VBAT FL1007 7 5 8 4 9 2 3 1 6 ANT RX1 TX GND1 GND5 GND2 RX2 GND3 GND4 C1082 330p 100p C1094 VBAT C1097 680p 1 2 C1091 1p C1093 100p 10n C1089 R1019 110 R1018 110 C1095 680p 330p C1080 2.2u C1081 12n L1016 2.2u C1096 DNI C1104 C1101 1n 2.4n L1015 DNI C1107 33p L1102 22 R1020 220 R1026 220 R1024 1.8n C1111 C1090 100 C1088 100 22 C1087 22 L1023 15n C1103 1.8n L1020 FL1006 7 5 8 4 9 2 3 1 6 ANT RX TX GND1 GND6 GND2 GND5 GND3 GND4 FL1008 5 3 2 4 1 IN OUT G2 G1 G3 DNI C1200 PA_ON0 PA_R0 PA_R0 PA_ON1 RX_WCDMA_HB 3G_PAM_MODE 3G_PAM_MODE W850_W900_TX_OUT PDET_IN RX_WCDMA_900_P RX_WCDMA_900_M W1900_W2100_RTX W850_W900_RTX W1900_W2100_TX_OUT Band II WCDMA DUAL Band V 4dB attunation Close to pin1 8dB TP3 TP2 2140MHz FL1003 5 2 4 3 1 IN OUT _OUT G1 G3 L1019 8.2p DNI R1016 R1015 0 VDD_RX C1079 1.8p C1083 DNI L1018 1.5n 1.2n L1017 1.5n L1024 100p C1078 1.8p C1092 C1077 0.1u R1014 1K DNI C1086 C1084 1.2n WB2100_MIX_INM WB2100_MIX_INP RX_WCDMA_1900_LNA_OUT RX_WCDMA_2100_LNA_OUT WCDMA RX 2100 LNA Circuit W2100 RX(2110 - 2170 MHz) TP5 Bias

- 41 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Set the phone Rx is On Check bias block soldering No Yes Change the board Check TP1 Signal exist? Check RF Switch (M/S) No Yes Check TP2 Signal exist? Check TX Module Refer 1.4 No Yes Check TP3 Signal exist? Check Duplexer No Yes Check TP4 Signal exist? DNI  SKIP No Yes Check TP5 Signal exist? Check RTR6285 and Rx SAW filter No Yes Check BIAS over 2.1 V?

- 42 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.6 Checking GSM Block START 4. Ro-download SW & Cal. 1. Check TCXO Block 2. Check Tx Module 3. Check RF TRX Level

- 43 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 1 2,3

- 44 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.6.1 Checking TCXO Block Refer to 3.3 3.6.2 Checking Tx module Block Refer to 3.4 3.6.3 Checking RF TX level TP1 TP2 TP3

- 45 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Schematic of GSM/DCS/PCS Tx Block C1038 10u 100p C1001 C1202 100p 1.2n C1022 4.7n L1004 DNI C1005 DNI C1125 VBAT U1001 16 15 14 13 12 11 10 17 9 8 7 6 4 3 28 1 44 43 42 41 40 39 38 37 36 35 32 33 34 24 23 22 29 30 31 18 21 25 20 26 19 27 5 2 GND2 GND5 GND13 TRX1 ANT TRX2 GND12 TRX3 VRAMP PGND3 PGND2 PGND1 GND10 TRX4 GND11 PGND6 PGND5 PGND4 PGND7 PGND8 PGND9 PGND10 PGND11 PGND12 PGND13 PGND14 PGND15 PGND16 GND1 GND14 GND3 GND4 GND6 GND7 GND8 TX_HB_IN TXEN TX_LB_IN BS2 BS1 VBATT VCC GND9 MODE C1039 100p 1 2 8.2n L1009 2 1 DNI C1124 HJ-ICT-06Y ANT1002 1 DNI C1004 ANT1001 HJ-ICT-06Y 1 C1127 1p C1002 6.8p C1003 DNI DNI C1128 130 R1012 2 1 R1011 47 2 1 130 R1013 R1008 91 2 1 R1007 91 75 R1006 SW1000 4 3 2 1 ANT COMMON G3 G4 100p C1046 C1203 100p L1001 15n 2 1 1n C1118 1 2 HJ-ICT-06Y ANT1005 1 C1007 1.8n C1201 DNI ANT_SEL2 ANT_SEL1 GSM850_GSM900_TX DCS_PCS_TX W1900_W2100_RTX W850_W900_RTX 11dB 7dB PCS(1850-1910 MHz) DCS(1710-1785 MHz) GSM850(824-849MHz) 2mm GSM900(880-915MHz) TP1 TP2 TP3

- 46 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Check TCXO Block Refer to 1.3 Check TP1 If GSM over 31 dBm? If DCS/PCS over 28 dBm? GSM/DCS/PCS Tx is OK Check other part Yes No Change the board Check TP2, 3 If GSM(TP2) under 6 dBm? If DCS/PCS(TP3) under 6 dBm? Check Tx Module (ASM+EDGE PAM) Refer to 4.4 Yes No Check RTR & PAD Check soldering and components No Problem Still exist Problem START

- 47 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.6.4 Checking RF Rx Block TP2 TP1

- 48 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Set the phone Rx is On Check RF Switch (M/S) No Yes Change the board Check TP1 Signal exist ? Check TP2 Signal exist ? Check Tx Module Refer to 3.4 No Yes Schematic of GSM/DCS/PCS Rx Block L1002 2n 100p C1001 DNI L1003 15n L1005 C1013 1.2n 7.5n C1028 C1024 1.2n L1006 DNI 7.5n C1040 1.2n C1022 4.7n L1004 FL1002 4 3 2 1 5 10 6 7 8 9 GSM1900_Bal_OUT2 GSM1900_Bal_OUT1 GSM1800_Bal_OUT2 GSM1800_Bal_OUT1 GND5 GND4 GSM1800/1900_IN GND1 GND2 GND3 DNI L1007 10p C1041 10p C1048 15n L1008 10n L1012 8.2n L1035 8.2n L1036 DNI C1005 DNI L1013 U1001 16 15 14 13 12 11 10 17 9 8 7 6 4 3 28 1 44 43 42 41 40 39 38 37 36 35 32 33 34 24 23 22 29 30 31 18 21 25 20 26 19 27 5 2 GND2 GND5 GND13 TRX1 ANT TRX2 GND12 TRX3 VRAMP PGND3 PGND2 PGND1 GND10 TRX4 GND11 PGND6 PGND5 PGND4 PGND7 PGND8 PGND9 PGND10 PGND11 PGND12 PGND13 PGND14 PGND15 PGND16 GND1 GND14 GND3 GND4 GND6 GND7 GND8 TX_HB_IN TXEN TX_LB_IN BS2 BS1 VBATT VCC GND9 MODE 8.2n L1009 2 1 HJ-ICT-06Y ANT1002 1 DNI C1004 C1127 1p C1002 6.8p C1003 DNI SW1000 4 3 2 1 ANT COMMON G3 G4 100p C1046 L1001 15n 2 1 C1007 1.8n FL1001 4 3 2 1 5 10 6 7 8 9 GSM900_Bal_OUT2 GSM900_Bal_OUT1 GSM850_Bal_OUT2 GSM850_Bal_OUT1 GND5 GND4 GSM850/900_IN GND1 GND2 GND3 RX_PCS_P RX_PCS_M RX_DCS_P RX_DCS_M RX_GSM_900_P RX_GSM_900_M RX_GSM_850_P RX_GSM_850_M W1900_W2100_RTX W850_W900_RTX GSM(925-960 MHz) DCS(1805-1880 MHz) PCS(1930-1990 MHz) GSM(869-894 MHz) TP2 TP1

- 49 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.7 GPS/WIFI/BT RF Component GPS Component Reference Description ANT1004 Antenna Pad FL1005 GPS SAW FILTER U1004 GPS LNA ANT1004 FL1005 U1004

- 50 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only BT/WiFi Component Reference Description ANT9001 ANTENNA PAD connected to Carrier type antenna U9000 BT module U9001 WiFi module FL9000 FEM ANT9001 FL9000 U9000 U9001

- 51 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.8 GPS/WIFI/BT SIGNAL PATH GPS Signal PATH (main board bottom) GPS Rx PATH

- 52 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only WiFi / BT Signal PATH WiFi / BT Tx and Rx PATH BT TRx WIFI_Rx WIFI_Tx

- 53 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.9 GPS/WIFI/BT Trouble shooting 3.9.1 A-GPS Block TP2 TP1 ANT1004 10n C1100 6.8p C1129 C1113 DNI 10n L1025 6.8n L1032 12 R1023 VREG_RF_2.7V_RTR 18p C1105 C1106 0.1u 6.8p C1115 DNI C1099 DNI C1114 C1098 100p 1.5n L1030 FL1005 5 3 2 4 1 IN OUT G1 G2 G3 3p L1027 100n L1026 U1004 4 3 5 2 6 1 7 PGND NC1 VDD RF_IN RF_OUT NC2 VSD R1021 12 DNI L1028 18p L1103 GPS_MODE GPS_IN Near To LNA LNA for the GPS TP1 TP2

- 54 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Set the phone GPS is ON Check TP1 About 2.7V? Check power LRC filter soldering No Yes Change the board Check TP2 About 2.6V? Check SW and NV item No Yes

- 55 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.9.2 WLAN/BT/FM Block START 1. Check the Power Component Change 2. Check the Clock 3. Check the Module [Figure] Schematic of WiFi/BT module TP2 TP1 TP3

- 56 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Module part C9003 1n L9000 0.5p C9000 100p L9007 100n DNI L9001 ANT9001 DNI C9004 3.3n L9005 DNI C9005 C9012 3n C9013 DNI 2400MHz,2500MHz FL9000 13 11 7 12 2 4 10 9 8 6 5 1 3 WLAN_RX WLAN_TX BT_TRX GND1 GND2 GND3 GND4 TR_SW0 TR_SW1 TR_SW2 ANT CPL PGND L9002 2n C9007 DNI DNI C9006 C9014 DNI C9011 DNI C9010 DNI C9009 DNI BT_WLAN_RF BT_WLAN_RF BT_RF_QCT WLAN_PWR_DET_IN WLAN_RF_RX WLAN_RF_TX WLAN_SW_[0] WLAN_SW_[1] WLAN_SW_[2] BT-ANT WiFi TX-ANT WiFi RX-ANT LOW LOW LOW HIGH HIGH LOW ANTENNA SWITCH MODULE LOGIC LOW SW2 SW1 SW0 HIGH LOW BT/WI-FI FRONT-END

- 57 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only C9044 DNI U9000 WCN-2243-0-58BWLNSP-TR-06-0 GND2 GND3 AGND_FM1 AGND_FM2 AGND_FM3 AGND_FM4 GND4 AGND_FM AGND_BT1 AGND_BT2 AGND_BT3 AGND_BT4 AGND_BT5 AGND_BT6 AGND_BT7 GND1 SYS_RST_N I2C_SDA I2C_SCL FM_HRX_IN FM_PRXTX_IO FM_I2S_SD FM_I2S_WS FM_I2S_SCK BT_PCM_IN BT_PCM_CLK SLEEP_CLK BT_UART_RXD BT_UART_TXD BT_UART_CTS BT_UART_RTS VDD_IO VDD_XO_BIAS VREG_DIG VREG_ANA VDD_LDO_IN VDD_FM_1P3_1 VDD_FM_1P3_2 VDD_FM_1P3_3 VDD_FM_1P3_4 VDD_DIG_1P3 VDD_FM_DAC VDD_BT_PA VDD_BT_1P3_1 VDD_BT_1P3_2 VDD_BT_1P3_3 VDD_BT_1P3_4 FM_RDS_INT SYS_CLK FM_LO_L FM_LO_R BT_PCM_OUT BT_PCM_SYNC BT_CLK_REQ BT_ACTIVE BT_STATUS TX_CONFIRM BT_RFIO TP9000 R9002 2.2K 2.2K R9001 100n L9004 C9025 10p R9003 DNI C9023 0.1u VREG_MSME_1.8V R9004 1M 10p C9018 +3V_WLAN_WCN 10n C9017 10n C9022 100n L9003 C9015 10n C9008 12p DNI L9006 1M R9000 VREG_MSME_1.8V 10n C9016 C9019 4.7u C9020 4.7u 10n C9021 1u C9024 C9002 22p C9045 DNI SLEEP_CLK FM_L FM_R BT_PCM_CLK BT_PCM_CLK BT_PCM_SYNC BT_PCM_SYNC BT_UART_CTS BT_UART_RTS BT_PCM_IN BT_PCM_IN BT_UART_RX BT_UART_TX FM_RDS_INT BT_FM_CLK_WCN BT_FM_CLK_REQ_WCN FM_ANT BT_PCM_OUT BT_PCM_OUT BT_RST_N I2C_COMMON_SDA_WCN I2C_COMMON_SCL_WCN BT_ACTIVE BT_PRIORITY WLAN_ACTIVE BT_RF_QCT FM_LO_PMIC FM_RO_PMIC BT/FM Module : WCN2243 close to pin13 close to pin5 close to pin54 close to pin37 TP9001 U9001 63 33 53 56 45 71 84 75 82 28 13 16 6 15 14 23 11 21 12 17 22 87 80 41 29 20 39 19 26 25 9 27 18 SLEEP_CLK GND_D1 DNC1 GND_D2 GND_D3 WLAN_RST_N WLAN_ACTIVE BT_PRIORITY BT_ACTIVE TCXO_IN RF_RX PDET_IN PA_EN WLAN_CLK_REQ TR_SW_EN_0 TR_SW_EN_1 TR_SW_EN_2 SDIO_CMD SDIO_CLK SDIO_DATA3 SDIO_DATA2 SDIO_DATA1 SDIO_DATA0 DNC2 PLL_EXT_LPF GND_A RF_TX_DA RF_TX_PA GND_A1 GND_A2 GND_A3 GND_A4 REXT C9030 470p R9008 10K C9035 1n SLEEP_CLK WLAN_CLK WLAN_CMD WLAN_SDIO[3] WLAN_SDIO[2] WLAN_SDIO[1] WLAN_SDIO[0] WLAN_RST_N WLAN_CLK_REQ_WCN WLAN_CLK_WCN BT_ACTIVE BT_PRIORITY WLAN_ACTIVE WLAN_PWR_DET_IN WLAN_RF_RX WLAN_RF_TX WLAN_SW_[0] WLAN_SW_[1] WLAN_SW_[2] Wi-Fi : WCN1314

- 58 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only START Check the power block No Yes Board Change Module Check Yes No TP1, 2, 3 is OK? SDIO ok? UART ok? Test point Description Test point Net name Description TP1 +3V_WLAN_WCN Power for BT/WiFi BB core and WiFi power Amp. (V Batt) TP2 VREG_MSME_1.8V Power for BT power Amp. (1.8V) TP3 VREG_MSME_1.8V Power for host interface (1.8V)

- 59 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.10 Power ON Trouble Shooting Power On sequence of E475F is : Power key press -> KPD_PWR_N go to low -> PM8029 Power Up -> VREG_MSMC1_1.1V (L4000), VREG_MSMC2_1.1V (L4001), VREG_MSME_1.8V (L4002), VREG_P3_2.85V (C4054), VREG_MSMA1_2.6V (C4049), VREG_MSMA2_1.2V (C4045) ,VREG_TCXO_2.85V (C4050) power ON -> Phone booting and PS_HOLD(R4026) go to High START Change or charging the Battery No Yes Redownload SW image Check correctly working power key No Yes Change the Main board No Yes Change the Main board No Yes Battery voltage higher than 3.70V(OCV)? TP1(R8010) high to low when key press? Check below power output (VREG_MSMC1_1.1V) (VREG_MSMC2_1.1V) (VREG_MSME_1.8V) (VREG_P3_2.85V) (VREG_MSMA1_2.6V) (VREG_MSMA2_1.2V) (VREG_TCXO_2.85V) Is clock ok? TP2 (X2000) : 19.2M

- 60 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE Internal Use Only

- 61 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only TP1 TP2 VREG_MSMA2_1.2V VREG_P3_2.85V VREG_TCXO_2.85V VREG_MSMC1_1.1V VREG_MSMC2_1.1V VREG_MSME_1.8V VREG_MSMA1_2.6V

- 62 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.11 Charging Trouble Shooting 1. Charging Procedure - Connect TA or u-USB Cable - Control the charging current by BQ25040 IC - Charging current flows into the battery 2. Check Point - Connection of TA or USB Cable - Charging IC (BQ25040) - Battery 3. Troubleshooting Setup - Connect TA and battery to the phone 4. Troubleshooting Procedure - Check the charger (TA or USB Cable) - Check the OVP Circuit - Check the Charging IC - Check the battery FL4001 2 5 1 4 3 6 ZD4003 DNI 1u C4002 VBUS_CHG_IN C4003 22p C4001 FL4000 1 IN OUT GND1 GND2 DNI ZD4004 ZD4001 CN4000 11 10 9 5 4 3 2 1 8 7 6 USB_ID MINIABB_DP MINIABB_DM 2mm VBUS 2mm u-USB Connector TA (5.1V, 600mA) 1u C4005 4.7K R4002 VREG_PROX_3.0V VREG_MSME_1.8V 2.2u C4077 U1 RT8966AGQW 33 28 27 26 13 25 11 10 24 23 31 22 29 21 20 14 12 7 2 9 5 32 19 18 17 8 30 6 16 4 3 15 1 OUT1 AUD1 VIN OUT3 AUD2 GND1 SCL LED2 MIC CAP RES DSS OUT4 LED3 OUT2 LED1 DP U2 UID D+ SDA D- INT\ VBUS1 VBUS2 LED4 DN VBAT1 U1 VBAT2 EXPDET GND2 PGND 1u C4006 1u C4000 TP1 4.7K R4001 CAM_AVDD_2.8V R4003 10K CAM_DVDD_1.2V CAM_IOVDD_1.8V C4075 1u 1u C4074 1u C4076 GND USBH_DP USBH_DM VREG_MSME_1.8V VBAT MINIABB_INT MINIABB_I2C_SCL MINIABB_I2C_SDA VBUS_CHG_IN VCHG_VBUS USB_ID MLED[4] MLED[1] MLED[3] MLED[2] MINIABB_DP MINIABB_DM Mini ABB_NS TA Main Battery

- 63 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Check the pin and battery connect terminals of I/O connector Connection OK? No Yes Is the u-USB Cable voltage 4.8V (for 5.0V) No Yes Is it changing properly After turning on? START Check changing IC(U1) SMT status by X-ray. Exchange changing IC or change the Main board and reset. Change I/O connector Change TA (or u-USB cable) END Yes No Charger Troubleshoot Flow U1

- 64 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.12 2M FF Camera Trouble Shooting 2M camera control signals are generated by MSM7225A. Check the camera Conn. and reconnect the camera No No END END Yes Yes START Yes Change the camera Change the Main board No No Yes MSM7227 output signal check MCLK(TP1), Reset(TP2), PWDN(TP3) Camera is OK? Check IOVDD(TP4), DVDD(TP5), AVDD(TP6) Camera is OK?

- 65 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only AM28 AK24 AN27 AK26 AM26 AT26 AJ25 AR25 AM24 AN25 AJ15 AP36 AN35 AR33 AR15 AN17 AM16 AT32 G23 E25 G25 D24 C25 E23 G19 E19 H18 C19 H22 AB4 AG3 MPM_GPIO_0 AG1 MPM_GPIO_1 MPM_GPIO_2 GPIO_4 GPIO_5 GPIO_6 GPIO_7 GPIO_8 GPIO_9 GPIO_10 GPIO_11 GPIO_12 GPIO_13 GPIO_14 GPIO_15 GPIO_16 GPIO_17 GPIO_18 GPIO_19 GPIO_20 GPIO_21 GPIO_22 GPIO_23 GPIO_24 GPIO_25 GPIO_26 GPIO_27 GPIO_28 GPIO_29 GPIO_30 GPIO_31 GPIO_32 7.5p C2018 DNI C2019 R2004 1 PA_ON1 PS_HOLD CAM_MCLK WLAN_RST_N LCD_RS eMMC_DATA[7] eMMC_DATA[6] eMMC_DATA[5] TCXO_EN PM_INT_N MINIABB_INT PMIC_SSBI PROX_OUT TOUCH_I2C_SDA TOUCH_I2C_SCL MOTION_I2C_SCL PROX_I2C_SCL PROX_I2C_SDA EAR_POLE_DET HOOK_DET BT_RST_N 3G_PAM_MODE SIM_CONTROLLER_I2C_SCL SIM_CONTROLLER_I2C_SDA TP1 0 R5008 0 R5007 C5003 2.2u VA5003 C5004 4.7u CAM_IOVDD_1.8V CN5000 13 12 14 11 15 10 16 9 17 8 18 7 19 6 20 5 21 4 22 3 23 2 24 1 R5002 2.2K R5003 2.2K CAM_IOVDD_1.8V 2.2u C5002 VA5004 CAM_AVDD_2.8V CAM_DVDD_1.2V 0 R5006 0 R5005 CAM_MCLK MIPI_CSI_CLKN MIPI_CSI_CLKP MIPI_CSI_DN MIPI_CSI_DP CAM_RESET_N CAM_I2C_SDA CAM_I2C_SCL CAM_PWDN 2M CAMERA TP2 TP3 TP5 TP6 TP4

- 66 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only TP1 R A 1 12 13 24 C4021 C4060 R9008 SW8003 FB9000 R1021 C4059 VA8010 R5002 C4065 C9027 C9043 C4052 L9002 C4071 C1114 C4054 C9042 R8002 R8006 L7000 L7001 R5006 C9032 C4058 C1098 C9040 C9030 FB9001 C9004 R8004 VA5004 C5003 C4048 C9034 C4056 L1103 C1115 C4061 C1105 R8010 C4050 C1129 L4 FL1005 C9029 L1030 R1023 L1026 L1025 VA8012 C4032 VA5003 C9026 L1032 C8010 C5002 R9007 R5007 C9038 U1004 VA8009 U9001 TP4002 C4046 C9005 VB7000 R8007 C9036 VA8013 R5008 C1099 C9039 C9007 R8005 R5003 C9028 R5005 C4047 C9041 FB4000 C1106 C4051 C4030 C1113 C1100 ANT1004 R8003 C4066 C4022 TP9000 C9006 R9009 C4016 C4031 C9037 C5004 CN5000 C4055 L1027 R8008 C9035 C4024 C7001 VA8011 FB4001 TP4003 C4045 X4000 C4057 D7000 C4 C9031 VA8008 VA8015 ZD8001 C9033 L1028 L9005 C4008 TP4001 C4009 TP5 TP6 TP4 TP2 TP3

- 67 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.13 Main LCD trouble Main LCD control signals are generated by MSM7225A. Those signal’s path are : MSM7225A -> LCD Module Press Power key to tun the power On Is the circuit powered? Yes Follow the Power ion trouble-shooting No LCD display OK? START No Yes Change the LCD Module Disconnect and reconnect LCD connector Yes END Change the Main board No Check Power VREG_MSME_1.8V(TP1) VREG_LCD_2.8V(TP2)

- 68 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only TP1 TP2

- 69 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.14 Proximity Sensor on/off Trouble Shooting Proximity Sensor is worked as below : Call connected -> Object moved at the sensor -> Control the screen’s on/off operation automatically Measurement VREG_MSME_1.8V VREG_PROX_3.0V PROX_OUT PROX_I2C_SCL / SDA Call Connect & Object moved at the Proximity Sensor LCD off? No No Yes Work well? START END Change the Proximity Sensor (U9002) No Yes Chang the main board Yes Check PROX_I2C_SDA / SCL Output & Prox_out (TP1,2,3)

- 70 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only U9002 VDD 1 SDA 8 SCL 2 INT 7 LDR 6 LEDA 4 LEDK 5 GND 3 R6008 4.7K C6004 1u R6006 4.7K 4.7K R6007 VREG_MSME_1.8V VREG_MSME_1.8V VREG_PROX_3.0V PROX_OUT PROX_I2C_SCL PROX_I2C_SDA Proximity sensor TP1 TP3 TP2 TP1 TP3 TP2

- 71 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.15 Motion Sensor on/off Trouble Shooting Motion Sensor is worked as below : Accelerometer Sensor function On -> Tilt the phone (90˚) -> The screen is had rotated automatic Measurement VREG_MSME_1.8V MOTION_INT MOTION_I2C_SDA / SCL Tilt the phone No No Yes START END No Yes Accelerometer Sensor function On Yes No Yes The Screen is rotated? Check Motion_I2C_SDA/SCL output Check Motion_INT output Work well? Change the Motion Sensor U6000 Change the Motion Sensor U6000 Change the Main board

- 72 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only U6000 BMA255 12 4 3 2 1 11 6 8 7 9 10 5 INT1 CSB GND VDD GNDIO INT2 PS SDO SDX VDDIO NC SCX C6001 0.1u VREG_MSME_1.8V C6003 0.1u R6004 4.7K R6000 4.7K MOTION_INT MOTION_I2C_SCL MOTION_I2C_SDA Accelerometer sensor TP1 TP2 TP2 TP1

- 73 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.16 DC Motor Trouble Shooting Vibrator is worked as below Measurement VBAT VIB_DRV_N TP1 is same voltage as VBAT? No Yes Change thr Motor, working well ? START END Change the Main board No Yes Vibrator is not working well Yes Votage is almost 3V Between TP1 and TP2 No Change the PMIC Change the Main board

- 74 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only D7000 VBAT C7001 1u 82n L7000 L7001 82n VB7000 2 1 VIB_DRV_N TP1 TP2 TP2 TP1

- 75 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.17 SIM detect Trouble Shooting Yes No START Check the SIM slot 1. No Check “Triple SIM Settings” No Yes insert SIM Card correctly No Change the Main B/D Change the Main B/D TP 3 is 1.8V or 3.0V and active? SIM1 is checked ? SIM Card is inserted correctly? TP 1 is 1.8V or 3V? TP 2 is 1.8V or 3V? Change the Main B/D END Yes Yes 1) SIM 1 trouble shooting

- 76 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 2) SIM 2 & SIM 3 trouble shooting Yes No START Check the SIM slot 2 or 3. No No Check “Triple SIM Settings” No Yes insert SIM Card correctly No Change the Main B/D Change the Main B/D Change the Main B/D TP 6 or 9 is 1.8V or 3.0V and active ? SIM 2 or SIM is checked ? SIM Card is inserted correctly? TP 10 & 11 is 1.8V ? TP 4 or 7 is 1.8V or 3V ? TP 5 or 8 is 1.8V or 3V ? Change the Main B/D END Yes Yes Yes

- 77 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only Measurement SIM 1 VREG_USIM1_2.85V SIM1_RST SIM1_IO SIM 2 & SMI 3 Controller HSSC-6P-27_N J8001 9 8 10 7 6 3 5 2 4 1 C1 C5 C2 C6 C3 C7 GND1 GND4 GND2 GND3 DNI C8012 C8011 DNI DNI C8000 VA8000 VA8004 VREG_USIM1_2.85V VA8003 VA8002 R8000 15K 0.1u C8004 SIM1_CLK SIM1_IO SIM1_RST TP2 TP1 TP3 U8001 TXS02324 21 4 18 3 12 20 19 1 2 7 8 6 5 17 16 15 11 10 9 14 13 SCK SDA SIMRST SIMCLK SIMI/O IRQ RSTX DNU VISM1 SIM1RST SIM1CLK SIM1I/O VSIM2 SIM2RST SIM2CLK SIM2I/O VDDI/O VBAT GND1 GND2 PGND R8022 1 C8025 1u C8024 1u VREG_USIM2_2.85V_CONN VREG_USIM3_2.85V VBAT C8023 1u 1u C8026 R8029 4.7K R8028 4.7K VREG_MSME_1.8V VREG_MSME_1.8V SIM2_CLK SIM2_RST SIM2_IO SIM3_RST SIM3_CLK SIM3_IO SIM2_RST_CONN SIM2_CLK_CONN SIM2_IO_CONN SIM_CONTROLLER_IRQ SIM_CONTROLLER_RESET SIM_CONTROLLER_I2C_SCL SIM_CONTROLLER_I2C_SDA TP10 TP11

- 78 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only SIM 3 VREG_USIM3_2.85V SIM2_RST SIM2_IO SIM2 VREG_USIM2_2.85V_CONN SIM2_RST SIM2_IO J8003 HSSC-6P-27_N 9 8 10 7 6 3 5 2 4 1 C1 C5 C2 C6 C3 C7 GND1 GND4 GND2 GND3 DNI C8022 VREG_USIM3_2.85V VA8021 C8008 0.1u VA8023 VA8024 VA8022 DNI C8020 DNI C8021 R8021 DNI SIM3_RST SIM3_CLK SIM3_IO TP8 TP7 TP9 J8002 9 8 10 7 6 3 5 2 4 1 C1 C5 C2 C6 C3 C7 GND1 GND4 GND2 GND3 C8014 DNI C8013 DNI VA8006 R8001 15K VA8001 VA8007 0.1u C8009 VA8005 VREG_USIM2_2.85V_CONN C8001 DNI SIM2_RST_CONN SIM2_CLK_CONN SIM2_IO_CONN TP6 TP5 TP4

- 79 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only TP5 TP6 TP1 TP2 TP3 TP4 TP9 TP7 TP8 TP10 TP11

- 80 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.18 Audio Troble 3.18.1 Receiver Path MSM7225A-0-AB EAR1_OP, EAR1_ON -> RCV_P, RCV_N -> R4023, R4021 (TP3) ->U4001 (PM8029 : PMIC) ->FB4001, FB4000 (TP2) -> CN7000 (TP1) (SPK Pad) Yes No START END Yes No Connect the phone to network equipment and set-up call. Set-up 1KHz tone out. No Yes Re-contact or Change the SPK/RCV module No Change the SPK/RCV module Change the U4001 (PMIC) Yes Change the U2000 (MSM7225A) or Change the main PCB Can you hear the 1KHz TONE? The sine wave appears at CN7000 (TP1) ? The sine wave appears at FB4001, FB4000 (TP2)? The sine wave appears at R4023, R4021(TP3)?

- 81 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only DNI C7020 DNI C7021 CN7000 2 1 VA7001 VA7000 SPK_RCV_P SPK_RCV_N Close to SPK TP1 TP1

- 82 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only TP4005 TP4007 TP4009 FB4000 220 12 R4023 R4021 12 R4020 0 220 FB4001 C4065 1n C4042 18n C4062 18n TP4006 1n C4066 R4019 0 C4037 3.3n P22 R19 N21 P20 F18 H18 H16 N19 P18 F16 H14 F14 E21 E19 M16 M14 M6 M8 N17 H10 H8 C11 K15 M10 K11 C9 E9 D6 R23 R21 D18 C19 C17 C15 D16 E15 D14 E13 MPP1 MPP2 MPP3 MPP4 MPP5 MPP6 MPP7 MPP8_XO_THERM GND_SPKR_1 GND_SPKR_2 GPIO_1 GPIO_2 GPIO_3 KPD_PWR_N RESIN_N OPTION1 SBDT PON_RESET_N PM_INT_N PA_THERM PM_TRK_LO TRK_LO_ADJ HSED_BIAS1 HSED_BIAS2 EXT_IN_LP EXT_IN_RM HPA_IN_LP HPA_IN_RM HPA_GNDREF SPKR_IN_M SPKR_IN_P HPA_CM_SNS HPA_OUT_L HPA_OUT_R SPKR_BYP_M SPKR_BYP_P SPKR_OUT_M SPKR_OUT_P R4018 0 TP4010 1u C4072 C4041 2.2u 2.2u C4040 C4063 0.1u TP4008 GND nPON_RST LINE_OP HPH_R HPH_L RCV_P RCV_N LINE_ON TRK_LO GSM_PA_DAC_REF PM_INT_N KPD_PWR_N TRK_LO_ADJ PMIC_SSBI CHG_VALID PCB_REVISION MSM_USIM1_CLK MSM_USIM1_DATA MSM_USIM2_DATA EAR_L_PMIC EAR_R_PMIC HSED_BIAS1 SPK_RCV_P SPK_RCV_N SIM1_IO FM_LO_PMIC FM_RO_PMIC SIM2_IO EAR_GND Route to 3.5pi GND Route to MSM-AGND (pin B10) TP2 TP3 FB4001 FB4000 (TP2) U4001 U2000 R4023,R4021(TP3)

- 83 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.18.2 Headset path MSM7225A-0-AB LINE_OP, LINE_ON -> C4040, C4041(TP2) -> U4001 (PM8029 : PMIC)->R7001, R7000 -> FB7003, FB7002(TP1) -> CN7001 ( 3.5pi Ear-jack ) Yes No START END Connect the phone to network equipment and set-up call. Set-up 1KHz tone out. No Yes Re-Solder & Change CN7001 or change the main PCB No Change the U4001 (PMIC) Yes Change the U2000 (MSM7225A) or Change the main PCB Can you hear the 1KHz TONE? The sine wave appears at FB7003, FB7002(TP1)? The sine wave appears at C4040, C4041(TP2)?

- 84 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only TP3 FB7003 FB7002 C7019 0 DNI C7027 1800 FB7004 CN7001 6 1 4 4D 5 M5-MIC M4-DETECT M4-L M1-R M6-GND VA7006 FB7003 1800 DNI C7007 12 R7000 C7010 47p DNI C7008 C7011 10n L7002 100n VA7007 12 R7001 FB7002 1800 0 R7013 ZD7000 DNI C7009 DNI VA7008 0 R7011 R7006 0 EAR_L_PMIC EAR_R_PMIC FM_ANT EAR_SENSE_3.5PI EAR_MIC_3.5PI EAR_GND Delete 11.03.24 EAR_SENSE CIRCUIT Delete 11.03.24 EAR_MIC_BIAS CIRCUIT 3.5pi Ear Jack Connector TP1

- 85 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only TP4005 TP4007 FB4000 220 12 R4023 R4021 12 R4020 0 220 FB4001 C4065 1n C4042 18n C4062 18n TP4006 1n C4066 R4019 0 C4037 3.3n P22 R19 N21 P20 F18 H18 H16 N19 P18 F16 H14 F14 E21 E19 M16 M14 M6 M8 N17 H10 H8 C11 K15 M10 K11 KPD_PWR_N RESIN_N OPTION1 SBDT PON_RESET_N PM_INT_N PA_THERM PM_TRK_LO TRK_LO_ADJ HSED_BIAS1 HSED_BIAS2 EXT_IN_LP EXT_IN_RM HPA_IN_LP HPA_IN_RM HPA_GNDREF SPKR_IN_M SPKR_IN_P HPA_CM_SNS HPA_OUT_L HPA_OUT_R SPKR_BYP_M SPKR_BYP_P SPKR_OUT_M SPKR_OUT_P R4018 0 1u C4072 C4041 2.2u 2.2u C4040 GND nPON_RST LINE_OP HPH_R HPH_L RCV_P RCV_N LINE_ON TRK_LO PM_INT_N KPD_PWR_N TRK_LO_ADJ PMIC_SSBI EAR_L_PMIC EAR_R_PMIC HSED_BIAS1 SPK_RCV_P SPK_RCV_N FM_LO_PMIC FM_RO_PMIC EAR_GND Route to 3.5pi GND Route to MSM-AGND (pin B10) TP2 U4001 C4041,C4040(TP2)

- 86 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.18.3 Speaker/Speaker Phone path MSM7225A-0-AB HPH_R, HPH_L -> C4062, C4042(TP3) -> U4001 (PM8029 : PMIC)-> FB4001, FB4000 (TP2) -> CN7000 (TP1) (SPK Pad). Yes No START END Yes No Connect the phone to network equipment and set-up call. Set-up 1KHz tone out. No Yes Re-contact or Change the SPK/RCV module No Change the SPK/RCV module Change the U4001 (PMIC) Yes Change the U2000 (MSM7225A) or Change the main PCB Can you hear the 1KHz TONE? The Sine wave appears at CN7000 (TP1) The Sine wave appears at FB4001, FB4000(TP2)? The Sine wave appears at C4062, C4042(TP3)?

- 87 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only DNI C7020 DNI C7021 CN7000 2 1 VA7001 VA7000 SPK_RCV_P SPK_RCV_N Close to SPK TP1 TP1(CN7000)

- 88 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only TP4005 TP4007 TP4009 FB4000 220 12 R4023 R4021 12 R4020 0 220 FB4001 C4065 1n C4042 18n C4062 18n TP4006 1n C4066 R4019 0 C4037 3.3n P22 R19 N21 P20 F18 H18 H16 N19 P18 F16 H14 F14 E21 E19 M16 M14 M6 M8 N17 H10 H8 C11 K15 M10 K11 C9 E9 D6 R23 R21 D18 C19 C17 C15 D16 E15 D14 E13 MPP1 MPP2 MPP3 MPP4 MPP5 MPP6 MPP7 MPP8_XO_THERM GND_SPKR_1 GND_SPKR_2 GPIO_1 GPIO_2 GPIO_3 KPD_PWR_N RESIN_N OPTION1 SBDT PON_RESET_N PM_INT_N PA_THERM PM_TRK_LO TRK_LO_ADJ HSED_BIAS1 HSED_BIAS2 EXT_IN_LP EXT_IN_RM HPA_IN_LP HPA_IN_RM HPA_GNDREF SPKR_IN_M SPKR_IN_P HPA_CM_SNS HPA_OUT_L HPA_OUT_R SPKR_BYP_M SPKR_BYP_P SPKR_OUT_M SPKR_OUT_P R4018 0 TP4010 1u C4072 C4041 2.2u 2.2u C4040 C4063 0.1u TP4008 GND nPON_RST LINE_OP HPH_R HPH_L RCV_P RCV_N LINE_ON TRK_LO GSM_PA_DAC_REF PM_INT_N KPD_PWR_N TRK_LO_ADJ PMIC_SSBI CHG_VALID PCB_REVISION MSM_USIM1_CLK MSM_USIM1_DATA MSM_USIM2_DATA EAR_L_PMIC EAR_R_PMIC HSED_BIAS1 SPK_RCV_P SPK_RCV_N SIM1_IO FM_LO_PMIC FM_RO_PMIC SIM2_IO EAR_GND Route to 3.5pi GND Route to MSM-AGND (pin B10) TP2 TP3 U4001 C4041,C4040(TP2) FB4000, FB4001 (TP2)

- 89 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.18.4 Main Microphone MIC Signal: MIC500 -> R7007, R7008(TP2) -> C2015, C2014 (TP3) -> MIC_1P / MIC_1N of MSM7225A-0-AB MIC Bias: MIC_BIAS -> C2003 (TP1) -> MIC500 No START Change the main PCB Make a call Yes No Make some sound or voice to MIC C2003(TP1) is about 1.8V? Some sound signal appears at R7007, R7008 (TP2)? Some sound signal appears at C2015,C2014 (TP3)? Yes Yes Work Well? END Change the MIC No Change the U2000 (MSM7225A) or Change the Main PCB

- 90 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only AA3 AD8 D22 AN1 AL31 AK30 B4 E5 E11 D8 E9 A13 B12 A7 B6 C5 A5 D6 E7 C13 HPH_L HPH_R AUXIN AUXIP MIC1N MIC1P MIC2N MIC2P EAR1_ON EAR1_OP LINE_ON LINE_OP AUX_OUT CCOMP MIC_BIAS RESIN_N RESOUT_N SLP_CLK USBPHY_SYSCLK RSVD4 TCXO C2003 1u C2002 0.1u C2001 47p R2016 10K MIC_BIAS 2.2K R2001 0.1u C2008 0.1u C2016 0.1u C2007 0.1u C2015 0.1u C2014 R2000 51K nPON_RST PMIC_TCXO SLEEP_CLK LINE_OP HPH_R HPH_L RCV_P RCV_N MIC_1P nJTAG_RESOUT LINE_ON MIC_1N nRESETOUT VREG_MSME_1.8V HS_MIC TP1 TP2 C7015 2.2u GOERTEK MIC500 EAB62950601 2 1 39p C7018 R7009 2.2K 39p C7014 100 R7008 R7007 100 R501 1K 2.2K R7010 2 1 C7013 39p MIC_BIAS MIC_1P MIC_1N MAIN C- MIC TP3

- 91 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only R7007,R7008(TP2) U2000 C2003 (TP1) C2014 (TP3) C2015 (TP3)

- 92 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 3.18.5 Headset microphone - MIC Signal : 3.5 pi Headset (CN7001) -> FB7004(TP3) -> J_MIC of U7000 -> C2008(TP4) MIC2P of MSM7225A-0-AB - MIC Bias : HSED_BIAS1 of U4001 -> R7012(TP2) -> Headset MIC - HS Detect IC Bias: VBAT & VREG_MSME_1.8V -> C7024(TP1) No START Make a call Yes No Make a some sound or voice to MIC Yes C7024(TP1) is about 1.8V & R7012(TP2) is about 1.8V? Some sound signal appears at FB7004 (TP3)? Some sound signal appears at C2008 (TP4)? Yes END No Change the U2001 (MSM7225A-0-AB) or Change the Main PCB Change the U4001 (PM8029) or Change the Main PCB Change the Headset or Re-solder/ Change the CN7001

- 93 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 2.2K R7012 R7025 DNI U7000 FSA8008UMX 9 4 6 3 5 2 7 1 8 10 J_DET J_MIC VIO MIC DET VDD EN S/E JPOLE GND VREG_MSME_1.8V VBAT C7026 470p C7023 1u 0.1u C7024 33p C7022 TP7001TP7002TP7003 TP7000 HSED_BIAS1 EAR_SENSE HS_MIC EAR_POLE_DET EAR_MIC_EN EAR_SENSE_3.5PI HOOK_DET EAR_MIC_3.5PI HOOK DETECT 3 /4 POLE JACK DETECT TP2 TP1 C7024 (TP1) CN7001 R7012 (TP2) U7000

- 94 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only DNI C7027 1800 FB7004 CN7001 6 1 4 4D 5 M5-MIC M4-DETECT M4-L M1-R M6-GND VA7006 FB7003 1800 VA7007 FB7002 1800 ZD7000 DNI VA7008 TP3 FB7004 (TP3)

- 95 - Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only AA3 AD8 D22 AN1 AL31 AK30 B4 E5 E11 D8 E9 A13 B12 A7 B6 C5 A5 D6 E7 C13 HPH_L HPH_R AUXIN AUXIP MIC1N MIC1P MIC2N MIC2P EAR1_ON EAR1_OP LINE_ON LINE_OP AUX_OUT CCOMP MIC_BIAS RESIN_N RESOUT_N SLP_CLK USBPHY_SYSCLK RSVD4 TCXO C2003 1u C2002 0.1u C2001 47p R2016 10K MIC_BIAS 2.2K R2001 0.1u C2008 0.1u C2016 0.1u C2007 0.1u C2015 0.1u C2014 R2000 51K nPON_RST PMIC_TCXO SLEEP_CLK LINE_OP HPH_R HPH_L RCV_P RCV_N MIC_1P nJTAG_RESOUT LINE_ON MIC_1N nRESETOUT VREG_MSME_1.8V HS_MIC TP4 U2000 C2008 (TP4)

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only 4. DOWNLOAD This document is draft version, so the contents will be updated after registering the final one. TOOL INFORMATION TOOL VERSION DLL NAME USB DRIVER Please Check the Version to “B2B” H/W Name Part No. SW D/L Cable

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE475F LGE475F

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE475F LGE475F

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only

Copyright © 2013 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only LGE475F LGE475F