Internal Use Only
Service Manual
LG-D821
Date: September, 2013 / Issue 0.9
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 & Solution .............................................................................6
2.4 HW Features ...............................................................................................6
2.5 SW Features ................................................................................................9
2.6 H/W SPEC. ................................................................................................. 12
2.7 LG-D821 Figures..................................................................................... 29
3. TROUBLE SHOOTING ..........................................................30
3.1 RF Component ....................................................................................... 30
3.2 SIGNAL PATH ........................................................................................... 33
3.3 Checking XO Block ................................................................................ 37
3.4 Checking RF Front-end Separator .................................................. 40
3.5 Checking RF Block ................................................................................. 43
3.6 GPS Trouble shooting ........................................................................122
3.7 WIFI/BT Trouble shooting .................................................................128
3.8 Audio troubleshooting .....................................................................133
3.9 Camera.....................................................................................................150
3.10 Main LCD trouble ..............................................................................156
3.11 Touch Trouble Shooting .................................................................160
3.12 Vibrator Troubleshooting ..............................................................162
3.13 Gyro/Accel Sensor Troubleshooting .........................................165
3.14 Compass sensor troubleshooting ..............................................167
3.15 Barometer sensor troubleshooting (Pressure Sensor ) ......169
3.16 Proximity Sensor on/o troubleshooting ...............................171
3.17 Light Sensor on/o trouble ..........................................................173
3.18 NFC .........................................................................................................175
3.19 Power ON Troubleshooting ..........................................................178
3.20 Wireless Charging Troubleshooting ..........................................182
3.21 USB Trouble shooting .....................................................................185
3.22 HDMI Troubleshooting ...................................................................188
4. DOWNLOAD .......................................................................192
5. BLOCK DIAGRAM ..............................................................209
6. CIRCUIT DIAGRAM ............................................................223
7. BGA PIN MAP .....................................................................238
8. PCB LAYOUT .......................................................................246
9. CALIBRATION .....................................................................252
10. DISASSEMBLE GUIDE ......................................................271
11. EXPLODED VIEW & REPLACEMENT PART LIST .............281
LGE Internal Use Only
- 2 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1. INTRODUCTION
1. Introduction
1. 1 Purpose
1. INTRODUCTION
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 Limitation
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.
LGE Internal Use Only
- 3 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1. INTRODUCTION
1. Introduction
E. Notice of Radiated Emission
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. information is ESD handling: Following
• 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.
LGE Internal Use Only
- 4 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
LG-D821 Product SPEC
2.1 Product Name
LG-D821 :WCDMA(B1,B2,B4,B5,B8)(HSPA+42Mbps(cat24)/ HSUPA 5.8Mbps(cat6)
+ GSM850/GSM900/DCS/PCS (GPRS Class10/EDGE Class10)+ FDD LTE (B1, B3, B5, B7, B8, B20)
(DL:102Mpbs, UL:51.0Mbps, Max DL MIMO layers = 2, Release8(Cat3))
2.2 Supporting Standard
2.1 Product Name
LG-D821 : WCDMA(B1,B2,B4,B5,B8)(HSPA+42Mbps(cat24)/ HSUPA 5.8Mbps(cat6) + GSM850/GSM900/DCS/PCS (GPRS Class10/EDGE
2.2 Supporting Standard
Class10)+ FDD LTE (B1, B3, B5, B7, B8, B20) (DL:102Mpbs, UL:51.0Mbps, Max DL MIMO layers = 2, Release8(Cat3))
2. PERFORMANCE
Supporting Standard
Item Feature Comment
WCDMA(FDD1,2,4,5,8)
/EGSM/GSM850/DCS1800/PCS1900 with seamless
handover
WCDMA(FDD1) TX : 1920 – 1980 MHz
WCDMA(FDD1) RX : 2110 – 2170 MHz
WCDMA(FDD2) TX : 1850 – 1910 MHz
WCDMA(FDD2) RX : 1930 – 1990 MHz
WCDMA(FDD4) TX : 1710 – 1755 MHz
WCDMA(FDD4) RX : 2110 – 2155 MHz
WCDMA(FDD5) TX : 824 – 849 MHz
WCDMA(FDD5) RX : 869 – 894 MHz
WCDMA(FDD8) TX : 880 – 915 MHz
WCDMA(FDD8) RX : 925 – 960 MHz
Frequency Range
EGSM TX : 880 – 915 MHz
EGSM RX : 925 – 960 MHz
GSM850 TX : 824 – 849 MHz
GSM850 RX : 869 – 894 MHz
GSM900 TX : 880 – 915 MHz
GSM900 RX : 925 – 960 MHz
DCS1800 TX : 1710 – 1785 MHz
DCS1800 RX : 1805 – 1880 MHz
PCS1900 TX : 1850 – 1910 MHz
PCS1900 RX : 1930 – 1990 MHz
Application Standard WAP 2.0
LGE Internal Use Only
- 5 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG-D821 Product SPEC
2.3 Main Parts & Solution
LG-D821 Product SPEC
2.3 Main Parts & Solution
Item Part Name Comment
Digital Baseband AP Q8064 : Qualcomm
Analog Baseband MDM9215M : Qualcomm
RF Chip WTR1605L : Qualcomm
2.4 HW Features
2.3 Main Parts & Solution
2.4 HW Features
Item Part Name Comment
Digital Baseband AP Q8064 : Qualcomm
Analog Baseband MDM9215M : Qualcomm
RF Chip WTR1605L : Qualcomm
2. PERFORMANCE
Item Feature Comment
Form Factor DOP type
Battery
Size
Weight 139.5 g with Battery
PCB FR4, 10 Layers , 0.8t
Stand by time
Charging time 3 hrs 30min @ Power Off
Talk time
1) Capacity
Standard : Li-Ion Polymer, 2300mAh
2) Packing Type : Soft Pack Embeded
Standard :
133.9 x 68.7 x 9.1 (unit : mm)
CDMA Up to 350 hrs
GSM Up to 350 hrs
WCDMA Up to 350 hrs
LTE Up to 350 hrs
CDMA Up to 690 min
GSM Up to 405 min
WCDMA Up to 530min
@ SCI2 (CDMA)
@ Paging Period 5 (GSM)
@ DRX 7 (WCDMA)
@ DRX7 (LTE)
@ Tx= 10dBm (CDMA)
@ TX=LV5(EGSM)
@ Tx = 10dBm (WCDMA)
RX sensitivity
LGE Internal Use Only
LTE Up to 230 min
WCDMA(FDD1) : -108 dBm
WCDMA(FDD2) : -108 dBm
WCDMA(FDD2) : -108 dBm
WCDMA(FDD5) : -108 dBm
WCDMA(FDD8) : -108 dBm
EGSM : -108 dBm
GSM850 : -108 dBm
DCS 1800 : -108 dBm
- 6 -
@ Tx = 10dBm (LTE )
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG-D821 Product SPEC
2. PERFORMANCE
PCS 1900 : -108 dBm
WCDMA B1,2, 4,8 :
24dBm/3.84MHz,+1/-
TX output power
GPRS
compatibilit
y
EDGE
GPRS Class
12
WCDMA/
GSM/
GPRS
EGSM : 26 dBm
GSM850 :26 dBm
DCS 1800 : 25 dBm
PCS 1900 : 25 dBm
3dBm
WCDMA B5 :
23.5dBm/3.84MHz,+1/-
3dBm
EGSM : 32.5dBm
GSM850 : 32.5 dBm
DCS 1800 : 30 dBm
PCS 1900 : 30 dBm
Class3(WCDMA)
Class4 (EGSM)
Class4 (GSM850)
Class1 (PCS)
Class1 (DCS)
E2 (GSM900)
E2 (PCS)
E2 (DCS)
EDGE compatibility GPRS Class 12
SIM card type
Display
(5.0”, 1920 X 1080 Pixels)
Built-in Camera 8M AF + 1.3M VT
Status Indicator Yes
Keypad
ANT Main : Internal Fixed Type
System connector 5 Pin u-USB
Ear Phone Jack 3.5Phi,
PC synchronization Yes
Memory(AP) 16Gb(SDRAM DDR2)
Plug-In SIM
3V /1.8V
Main LCD
IPS TFT Main LCD
Full Touch Screen
Side Key : 3
Side Key : Power On
Volume up/down
LGE Internal Use Only
- 7 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG-D821 Product SPEC
+ 16GB eMMC
Speech coding FR, EFR, HR,AMR
Vibrator Built in Vibrator
BlueTooth Bluetooth 3.0
2. PERFORMANCE
MIDI(for Buzzer
Function)
Music Player
Video Player MPEG4, H.264
Camcorder MPEG4 or H.263
Voice Recording Yes
Speaker Phone mode
Support
Travel Adapter Yes
CDROM No
Stereo Headset Yes
Data Cable Yes
T-Flash
(External Memory)
SW Decoded 72Poly
MP3/WMA/AAC/MIDI/EAAC+/HE
AAC/OGG
Yes
No
LGE Internal Use Only
- 8 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
LG-D821 Product SPEC
2.5 SW Features
2.5 SW Features
Item Feature Comment
RSSI 0 ~4 Levels
Battery Charging 0 ~ 7 Levels
Key Volume 0 ~ 7 Level
Audio Volume 0 ~ 15 Level
Time / Date Display Yes
Multi-Language Yes
Quick Access Mode Camera/Chrome/App/Message/Phone
PC Sync No
Speed Dial Yes Voice mail center -> 1 key
Profile Yes
CLIP / CLIR Yes
English, Espanol, Franch,
Korea, Chinese, etc
not same with feature phone
setting
Name / Number / Email /Organization/
Website / Postal addresses /Events/
Phone Book
Note / IM / Nickname / Internet call/
Group
Last Received
Yes
Number
Last Missed Number Yes
Search by Number
Name / Number
/ Name
Group Yes
There is no limitation on the
number of items.
It depends on available
memory amount.
There is no limitation on the
number of items.
It depends on available
memory amount.
There is no limitation on the
number of items.
It depends on available
LGE Internal Use Only
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memory amount.
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
LG-D821 Product SPEC
Fixed Dial Number Yes
Service Dial Number No
Own Number Yes Read / Write
Voice Memo No
Call Reminder No
Network Selection Automatic
Mute Yes
Call Divert Yes
Call Barring No
Call Charge (AoC) No
Call Duration No
SMS (EMS)
SMS Over GPRS Yes
There is no limitation on the number of
items.
EMS does not support.
It depends on available memory
amount.
EMS Melody / Picture
Send / Receive / Save
MMS MPEG4
Send / Receive / Save
Long Message Yes
Cell Broadcast Yes
Download Yes
Game Yes
Calendar Yes
Memo No
World Clock No
Unit Convert Yes
Stop Watch Yes
Wall Paper No
WAP Browser Yes
No
No
TBD
WAP stack and wml are not
supported.
Download Melody /
Wallpaper
LGE Internal Use Only
Over web browser
- 10 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG-D821 Product SPEC
SIM Lock No
SIM Toolkit Class 1, 2, 3, C, E
MMS Yes
EONS Yes
CPHS Yes V4.2
ENS No
2. PERFORMANCE
Camera Yes
JAVA Android do not support JAVA
Voice Dial No
IrDa No
Bluetooth No Ver.4.0
FM radio Yes
GPRS No Class 12
EDGE Yes Class 12
Hold / Retrieve Yes
Conference Call Yes Max. 7
DTMF Yes
Memo pad No
TTY Yes
AMR Yes
SyncML No
8M AF
VT : 1.3 M HD
IM Yes Gtalk
Email Yes
LGE Internal Use Only
- 11 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG-D821 Product SPEC
2.6 HW SPEC.
1) GSM transceiver specification
2.6 H/W SPEC.
1) GSM transceiver specication
2. PERFORMANCE
Item Specification
(Radiated Spurious Emission Disturbance)
Transmitter Output power
Spectrum due to modulation out to less than
Spectrum due to modulation out to larger than
1800kHz offset to the edge of the transmit
Phase Error Rms : 5°/ Peak : 20 °
Frequency Error GSM : 0.1 ppm/ DCS / PCS : 0.1 ppm
EMC
Burst Timing < 3.69us
1800kHz offset
band
GSM/DCS : < -28dBm
GSM850, EGSM : 5dBm ~ 32.5dBm ± 3dB
DCS/PCS : 0dBm ~ 30dBm ± 3dB
200kHz : -36dBm
600kHz : -51dBm/-56dBm
GSM850, EGSM :
1800-3000kHz :< -63dBc(-46dBm)
3000kHz-6000kHz : <-65dBc(-46dBm)
6000kHz < : < -71dBc(-46dBm)
DCS, PCS :
1800-3000kHz :< -65dBc(-51dBm)
Spectrum due to switching transient
Reference Sensitivity – TCH/FS Class II(RBER) : -105dBm(2.439%)
Usable receiver input level range 0.012(-15 - -40dBm)
Intermodulation rejection
LGE Internal Use Only
6000kHz < : < -73dBc(-51dBm)
400kHz : -19dBm/-22dBm(5/0), -23dBm
600kHz : -21dBm/-24dBm(5/0), -26dBm
± 800kHz, ± 1600kHz
– Speech channels
AM Suppression
- GSM : -31dBm
- DCS : -29dBm
Timing Advance ± 0.5T
- 12 -
: -98dBm / -96dBm (2.439%)
-98dBm/-96dBm (2.439%)
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG-D821 Product SPEC
2) WCDMA transmitter specification
2) WCDMA transmitter specication
2. PERFORMANCE
Maximum Output Power
Item Spec. Min Typ. Max Unit
Frequency Accuracy - -200 - +200 Hz
Minimum Output Power - - - -50 dBm/3.84MHz
Occupied Bandwidth - - - 4.6 MHz
Adjacent Channel
Leakage Power Ratio
Error Vector
Magnitude(EVM)
Peak Code Domain Error - - - 15 dBm/3.84MHz
Open Loop
106.7dBm/3.84MHz
Power class Ⅲ
Δf = ± 5MHz
Δf = ± 10MHz
- - - 17 %
Ior =-
21.0 24 25.0 dBm/3.84MHz
- - -33 dBm/3.84MHz
- - -43 dBm/3.84MHz
-46.7 - -28.7 dBm/3.84MHz
Output Power
Transmit Off Power - - - -56 dBm/3.84MHz
Spectrum Emission Mask
Transmit Spurious
Emission
Ior =-65.7dBm/3.84MHz -23.0 - -5.0 dBm/3.84MHz
Ior =-25.0dBm/3.84MHz -0.0 - 14.0 dBm/3.84MHz
Δf = 2.5~3.5MHz -35-15 * (Δf-2.5) dBc/30KHz
Δf = 3.5~7.5MHz -35-1 * (Δf-3.5) dBc/1MHz
Δf = 7.5~8.5MHz -39 10 * (Δf-7.5) dBc/1MHz
Δf = 8.5~12.5MHz -49 dBc/1MHz
9kHz ~ 150kHz
150kHz ~ 30MHz
30MHz ~ 1GHz
1GHz ~ 12.5GHz
-36 dBm
-36 dBm
-36 dBm
-30 dBm
LGE Internal Use Only
- 13 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
LG-D821 Product SPEC
3) WCDMA receiver specification
3) WCDMA receiver specication
Item Spec. Min Typ. Max Unit
Reference
Sensitivity Level
Maximum
Input Level
Adjacent Channel
Selectivity(ACS)
In Band Blocking
BER < 0.001% - - -106.7 dBm/3.84MHz
Pin = -25dBm - - 0.1 BER(%)
Jammer(Modulation)
= -52dBm/3.84MHz
Δf = ± 5MHz
BER < 0.001%
Jammer(Modulation)
= -56dBm/3.84MHz
Δf = ± 10MHz
BER < 0.001%
Jammer(Modulation)
= -44dBm/3.84MHz
Δf = ± 15MHz
BER < 0.001%
- - -103 dBm/3.84MHz
- - -103.7 dBm/3.84MHz
- - -103.7 dBm/3.84MHz
Inter-modulation
Desensitization
Spurious Emissions
Jammer1(CW)= -46dBm
Jammer2(Modulation)
= -46dBm/3.84MHz
Δf=± 10MHz
BER < 0.001%
Jammer1= -46dBm(CW)
Jammer2(Modulation)
= -46dBm/3.84MHz
Δf=± 20MHz
BER < 0.001%
30kHz ~ 1GHz - - -57 dBm/30kHz
1GHz ~ 1.92GHz - - -47 dBm/1MHz
1.92GHz ~ 1.98GHz - - -60 dBm/3.84MHz
1.98GHz ~ 2.11GHz - - -47 dBm/3.84MHz
2.11GHz ~ 2.17GHz - - -60 dBm/3.84MHz
2.17GHz ~ 12.75GHz - - -47 dBm/1MHz
- - -103.7 dBm/3.84MHz
- - -103.7 dBm/3.84MHz
LGE Internal Use Only
- 14 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG-D821 Product SPEC
4) HSDPA transmitter / receiver specification
for
4) HSDPA transmitter / receiver specication
2. PERFORMANCE
transmitter
Item Spec. Min Typ. Max Unit
5.2.A Maximum
Output Power
with HS-DPCCH
5.7A HS-DPCCH
5.9A Spectrum
Emission Mask
with HS-DPCCH
1/15 ≤ βc/βd ≤ 12/15
13/15 ≤ βc/βd ≤ 15/8
15/7 ≤ βc/βd ≤ 15/0
Step 1 – Step 0 6 dB +/- 2.3 dB dB
MAX /
0dBm
Step 2 – Step 3 1 dB +/- 0.6 dB dB
Step 5 – Step 4 0 dB +/- 0.6 dB dB
Step 6 – Step 7 5 dB +/- 2.3 dB dB
Δf = 2.5~3.5MHz -35-15 * (Δf-2.5) dBc/30KHz
Δf = 3.5~7.5MHz -35-1 * (Δf-3.5) dBc/1MHz
Δf = 7.5~8.5MHz -39 10 * (Δf-7.5) dBc/1MHz
21
20
19
Step 0 0 dBm +/- 1 dB dB
23
22.5
22
25
25
25
dBm/3.84MHz
receiver
5.10A Adjacent
Channel
Leakage Power
Ratio with HS-
DPCCH
5.13.1A Error
Vector
Magnitude
(EVM) with HS-
DPCCH
6.3A Maximum
Input Level
HS-PDSCH
Reception
Δf = 8.5~12.5MHz -49 dBc/1MHz
Δf = ± 5MHz
Δf = ± 10MHz
MAX Power
-20 dBm
Pin = -25dBm - - 10 BLER(%)
- - -33 dBm/3.84MHz
- - -43 dBm/3.84MHz
- - 17.5 %
LGE Internal Use Only
- 15 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5) LTE Transmitter specication
LG-D821 Product SPEC
5) LTE Transmitter specification
20.3
23.0
25.7
Item Spec. Min Typ. Max Unit
2. PERFORMANCE
Maximum Output
Power (Class III)
Frequency Error QPSK
EVM
IQ-component QPSK, 12RB
In-band emissions
for non allocated RB
Spectrum Flatness QPSK, 50RB -2
Occupied bandwidth QPSK, 50RB
Leakage Power Ratio)
ACLR
(Adjacent Channel
Power class 3
(Environmental Test )
QPSK
16QAM
QPSK, 12RB
E-UTRA ACLR1
UTRA ACLR1
UTRA ACLR2
( 20.3)
-0.1 PPM
-15hz
( 23.0)
dBm/
( 25.7)
+0.1 PPM
+15hz
17.5
12.5
-24.2 dBc
-24.2 dB
+3.4 dB
10 MHz
-29.2 dB
-32.2 dB
-35.2 dB
10MHz
%
Transmitter
Spurious emissions
9 kHz < f < 150 kHz
150kHz < f < 30 MHz
30MHz < f < 1GHz
1GHz < f < 12.75GHz
-36 dBm/1kHz
-36 dBm/10kHz
-36 dBm/100kHz
-30 dBm/1MHz
LGE Internal Use Only
- 16 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
6) LTE receiver specication
LG-D821 Product SPEC
6) LTE receiver specification
2. PERFORMANCE
Item Spec. Min Typ. Max Unit
Sensitivity Level
(DL : QPSK, 50RB
UL : QPSK, 25RB)
Maximum input Level
ACS
(Adjacent Channel
Selectivity)
Dual Receiver
Single Receiver
(exception in 3GPP)
Dual Receiver
(DL : 64QAM, 50RB
UL : QPSK, 12RB)
Dual Receiver
(DL : QPSK, 50RB
UL : QPSK, 12RB)
Δf = ± 7.5MHz, LTE BW
5MHz
Dual Receiver
B2: -95
dBm/
B4 : -97
10MHz
B17: -94
B2 : -92
dBm
B4 : -94.0
/10MHz
B17: -91.0
dBm
-25.7
/10MHz
33 dB
In-Band Blocking
(DL : QPSK, 50RB
UL : QPSK, 20RB)
Narrow Band Blocking
(DL : QPSK, 50RB
UL : QPSK, 20RB)
Intermodulation
(DL : QPSK, 50RB
UL : QPSK, 20RB)
Spurious emissions
(DL : QPSK, 0RB
UL : QPSK, 0RB)
Δf = ± 7.5MHz, LTE BW
5MHz
Δf = ± 12.5MHz, LTE BW
5MHz
Dual Receiver
Δf = ± 5.2125MHz, CW
Dual Receiver
Δf = ± 12.5MHz, CW
Δf = ± 25MHz, LTE BW
5MHz
Dual Receiver
30MHz < f < 1GHz
1GHz < f < 12.75 GHz
-88.3
dBm
/10MHz
dBm
-81.3
/10MHz
dBm
-88.3
/10MHz
dBm
-57
/100kHz
dBm
-47
/1MHz
LGE Internal Use Only
- 17 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG-D821 Product SPEC
7) WLAN 802.11a transceiver specification
7) WLAN 802.11a transceiver specication
2. PERFORMANCE
Item Specification
Transmit Frequency 5170 ~ 5815 MHz (CH36 ~ 64, CH100 ~ 124, CH149 ~ 161)
Tx Power Level ≤ 2.5mW/MHz(CH36 ~ 48), ≤ 10mW/MHz(CH52 ~ 161)
Frequency Tolerance within ±20 PPM
Chip clock Frequency
Tolerance
Spectrum Mask
Transmitter constellation error
(rms EVM)
within ±20 PPM
≤ -20 @ ±11MHz offset (9Mhz ~ 11MHz)
≤ -28 @ ±20MHz offset (11MHz ~ 20Mhz)
≤ -40 @ ±30MHz offset (20MHz ~ 30Mhz)
≤ -5dB@6Mbps, ≤ -8dB@9Mbps, ≤ -10dB@12Mbps,
≤ -13dB@18Mbps, ≤ -16dB@24Mbps, ≤ -19dB@36Mbps,
≤ -22dB@48Mbps, ≤ -25dB@54Mbps
< -36 dBm @ 30 MHz to 47 MHz
< -54 dBm @ 47 MHz to 74 MHz
< -36 dBm @ 74 MHz to 87,5 MHz
< -54 dBm @ 87,5 MHz to 118 MHz
< -36 dBm @ 118 MHz to 174 MHz
Spurious Emissions
-82dBm@6Mbps, -81dBm@9Mbps, -79dBm@12Mbps
Rx Min input Sensitivity
-77dBm@18Mbps, -74dBm@24Mbps, -70dBm@36Mbps
Rx Max input Sensitivity ≥ -30dBm(6,9,12,18,24,36,48,54Mbps) @ PER ≤ 10%
< -54 dBm @ 174 MHz to 230 MHz
< -36 dBm @ 230 MHz to 470 MHz
< -54 dBm @ 470 MHz to 862 MHz
< -36 dBm @ 862 MHz to 1 GHz
< -30 dBm @ 1 GHz to 5.15 GHz
< -30 dBm @ 5.35 GHz to 5.47 GHz
< -30 dBm @ 5.725 GHz to 26.5 GHz
PER ≤ 10%
-66dBm@48Mbps, -65dBm@54Mbps
LGE Internal Use Only
- 18 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
LG-D821 Product SPEC
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 802.11b transceiver specification
LG-D821 Product SPEC
ACR shall be measured by setting the desired signal's strength
Rx Adjacent Channel
Rejection
※
8) WLAN 802.11b transceiver specication
Chip clock Frequency
Item Specification
Transmit Frequency 2400 MHz ~ 2483.5 MHz ( CH1~CH13 )
Tx Power Level ≤ 20dBm under (Europe), ≤ 30dBm under (USA)
Frequency Tolerance within ±25 PPM
Tolerance
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
3 dB above the rate-dependent
sensitivity specified in min input sensitivity
within ±25 PPM
Spectrum Mask
Power ramp on/off time ≤ 2us
Carrier Suppression ≤ -15dB
Modulation Accuracy(Peak EVM) ≤ 35%
Spurious Emissions
Rx Min input Sensitivity ≤ -76dBm(1Mbps,2Mbps,5.5Mbps,11Mbps) @ FER ≤ 8%
Rx Max input Sensitivity ≥ -10dBm(1Mbps,2Mbps,5.5Mbps,11Mbps) @ FER ≤ 8%
Rx Adjacent Channel
≤ -30 @ fc-22MHz< f <fc-11MHz and fc+11MHz< f <fc+22MHz
≤ -50 @ f < fc-22MHz and f > fc+22MHz
< -36 dBm @ 30MHz ~ 1GHz
< -30 dBm above @ 1GHz ~ 12.75GHz
< -47 dBm @ 1.8GHz ~ 1.9GHz
< -47 dBm @ 5.15GHz ~ 5.3GHz
≥ 35dB @FER ≤ 8%,
Rejection
LGE Internal Use Only
interference input signal -70dBm@fc±25MHz(11Mbps)
- 19 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
9) WLAN 802.11g transceiver specication
LG-D821 Product SPEC
8) WLAN 802.11g transceiver specification
ACR shall be measured by setting the desired signal's strength 3 dB
Item Specification
2. PERFORMANCE
Transmit Frequency 2400 MHz ~ 2483.5 MHz ( CH1~CH13 )
Tx Power Level ≤ 20dBm under (Europe), ≤ 30dBm under (USA)
Frequency Tolerance within ±25 PPM
Chip clock Frequency Tolerance within ±25 PPM
Spectrum Mask
Transmitter constellation error
(rms EVM)
Spurious Emissions
≤ -13dB@18Mbps, ≤ -16dB@24Mbps, ≤ -19dB@36Mbps,
≤ -20 @ ±11MHz offset (9Mhz ~ 11MHz)
≤ -28 @ ±20MHz offset (11MHz ~ 20Mhz)
≤ -40 @ ±30MHz offset (20MHz ~ 30Mhz)
≤ -5dB@6Mbps, ≤ -8dB@9Mbps, ≤ -10dB@12Mbps,
≤ -22dB@48Mbps, ≤ -25dB@54Mbps
< -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
Rx Max input Sensitivity ≥ -20dBm(6,9,12,18,24,36,48,54Mbps) @ PER ≤ 10%
Rx Adjacent Channel
Rejection
※
LGE Internal Use Only
-82dBm@6Mbps, -81dBm@9Mbps, -79dBm@12Mbps
-77dBm@18Mbps, -74dBm@24Mbps, -70dBm@36Mbps
-66dBm@48Mbps, -65dBm@54Mbps
ACR ≥ 16dB@6Mbps, ACR ≥ 15dB@9Mbps,
ACR ≥ 13dB@12Mbps, ACR ≥ 11dB@18Mbps,
ACR ≥ 8dB@24Mbps, ACR ≥ 4dB@36Mbps
ACR ≥ 0dB@48Mbps, ACR ≥ -1dB@54Mbps
sensitivity specified in min input sensitivity
PER ≤ 10%
PER ≤ 10%,
above the rate-dependent
- 20 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
10) WLAN 802.11n(HT20) transceiver specication
LG-D821 Product SPEC
9) WLAN 802.11n(HT20) transceiver specification
Item Specification
2. PERFORMANCE
Transmit Frequency
5150~5850MHz(CH36,CH40,CH44,CH48~116,CH132~165) (USA)
Tx Power Level
Frequency Tolerance
Chip clock Frequency
Tolerance
Spectrum Mask
Transmitter constellation error
(rms EVM)
<50mW(CH36~48), <250mW(CH52~140), <1W(CH149~165) (USA)
2400 MHz ~ 2473.5 MHz ( CH1~CH11) (USA)
2400 MHz ~ 2483.5 MHz ( CH1~CH13) (Europe)
5150~5725MHz(CH36,CH40,CH44,CH48~140) (Europe)
≤20dBm (CH1~13) (Europe), ≤ 30dBm (CH1~11) (USA)
≤20dBm(CH36~64), ≤27dBm(CH100~140) (Europe)
≤ -5dB@6.5Mbps, ≤ -10dB@13Mbps, ≤ -13dB@19.5Mbps,
≤ -16dB@26Mbps, ≤ -19dB@39Mbps, ≤ -22dB@52Mbps,
within ±25 PPM(2400 ~ 2483.5 MHz)
within ±20 PPM(5150 ~ 5850 MHz)
within ±25 PPM(2400 ~ 2483.5 MHz)
within ±20 PPM(5100 ~ 5850 MHz)
≤ -20 @ ±11MHz offset (9Mhz ~ 11MHz)
≤ -28 @ ±20MHz offset (11MHz ~ 20Mhz)
≤ -45 @ ±30MHz offset (20MHz ~ 30Mhz)
≤ -25dB@58.5Mbps, ≤ -28dB@65Mbps
Spurious Emissions
[ 2400 MHz ~ 2483.5 MHz ( CH1 ~ 13 ) ]
< -36 dBm @ 30MHz ~ 1GHz
< -30 dBm above @ 1GHz ~ 12.75GHz
< -47 dBm @ 1.8GHz ~ 1.9GHz
< -47 dBm @ 5.15GHz ~ 5.3GHz
[ 5150 MHz ~ 5850 MHz ( CH36 ~ 165 ) ]
< -36 dBm @ 30 MHz to 47 MHz
< -54 dBm @ 47 MHz to 74 MHz
< -36 dBm @ 74 MHz to 87,5 MHz
< -54 dBm @ 87,5 MHz to 118 MHz
< -36 dBm @ 118 MHz to 174 MHz
< -54 dBm @ 174 MHz to 230 MHz
< -36 dBm @ 230 MHz to 470 MHz
< -54 dBm @ 470 MHz to 862 MHz
< -36 dBm @ 862 MHz to 1 GHz
< -30 dBm @ 1 GHz to 5.15 GHz
< -30 dBm @ 5.35 GHz to 5.47 GHz
< -30 dBm @ 5.725 GHz to 26.5 GHz
LGE Internal Use Only
- 21 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG-D821 Product SPEC
Rx Min input Sensitivity
2. PERFORMANCE
PER ≤ 10%
-82dBm@6.5Mbps, -79dBm@13Mbps, -77dBm@19.5Mbps
-74dBm@26Mbps, -70dBm@39Mbps, -66dBm@52Mbps
-65dBm@58.5Mbps, -64dBm@65Mbps
Rx Max input Sensitivity
Rx Adjacent Channel
Rejection
≥ -20dBm @ PER ≤ 10%(2400 ~ 2483.5 MHz)
≥ -30dBm @ PER ≤ 10%(5150 ~ 5850 MHz)
PER ≤ 10%,
ACR ≥ 16dB@6.5Mbps, ACR ≥ 13dB@13Mbps,
ACR ≥ 11dB@19.5Mbps, ACR ≥ 8dB@26Mbps,
ACR ≥ 4dB@39Mbps, ACR ≥ 0dB@52Mbps
ACR ≥ -1dB@58.5Mbps, 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
LGE Internal Use Only
- 22 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG-D821 Product SPEC
10) Bluetooth transmitter specification
11) Bluetooth transmitter specication
Item Spec. Min Typ. Max Unit
2. PERFORMANCE
Output Power
Power Density
Frequency Range
Tx Output Spectrum
(20dB BW)
Tx Output Spectrum
(Adjacent Output Power)
DH5
PRBS9
DH5
PRBS9
DH5
PRBS9
DH5
PRBS9
DH5
PRBS9
DH5
11110000
Modulation Index
DH5
10101010
Nominal Pwr -6 - +20 dBm
Peak Pwr - - +23 dBm
@100kHz BW
- +20 dBm
-30dBm
2400 - 2483 MHz
@100kHz BW
AVG
H-fL
f1
AVG
f2
MAX
/f1
AVG
140 - 175
115 -
0.8 -
- 1 MHz
- -20
- -40
dBm
dBm
kHz
kHz
Δf =f
@M-N = 2
@M-N >= 3
f2
Initial Carrier Freq.
Tolerance
Carrier Frequency Drift
Out of Band Spurious
Emission
LGE Internal Use Only
DH5
PRBS9
DH1
Freq. Drift -25 - +25
10101010
DH3
Freq. Drift -40 - +40
10101010
Freq. Drift -40 - +40
DH5
10101010
DH1
PRBS9
@ 30MHz ~ 12.75GHz
-75 - +75
Drift Rate -20 - +20
Drift Rate -20 - +20
Drift Rate -20 - +20
- 23 -
20
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
kHz
kHz
kHz/50us
kHz
kHz/50us
kHz
kHz/50us
dBc
2. PERFORMANCE
LG-D821 Product SPEC
11) Bluetooth receiver specification
12) Bluetooth receiver specication
Item Spec. Min Typ. Max Unit
Sensitivity
(Single Slot Packet)
Sensitivity
(Multi Slot Packet)
C/I Performance
DH1
PRBS9
DH5
PRBS9
DH1
PRBS9
BER @ 0.1%
BER @ 0.1%
Co-Channel
-60dBm@ BER0.1%
C/I @1MHz
-60dBm@ BER 0.1%
C/I @2MHz
-60dBm@ BER 0.1%
C/I @≥3MHz
-67dBm@ BER0.1%
- -70 dBm
- -70 dBm
- 11
- 0
- -30
dB
- -40
Blocking Performance
DH1
PRBS9
C/I @Image
-67dBm@ BER 0.1%
C/I @1MHz Image
-67dBm@ BER 0.1%
-10dBm @
30M ~2 GHz
-27dBm @
2 ~ 2.4 GHz
-27dBm @
2.5 ~ 3 GHz
-10dBm @
3 ~ 12.75 GHz
- -9
- -20
- -67 dBm
LGE Internal Use Only
- 24 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG-D821 Product SPEC
Δf = +5MHz (CW)
LG-D821 Product SPEC
Intermodulation
Performance
DH1
PRBS9
Δf = +5MHz (CW)
Δf = +10MHz (BT)
BER @ 0.1%
- -64 dBm
Δf = -5MHz (CW)
Δf = -10MHz (BT)
BER @ 0.1%
- -64 dBm
Maximum Input Level
DH1
PRBS9
BER @ 0.1% -20 -
dBm
12) GPS receiver specification
2. PERFORMANCE
Intermodulation
Performance
Maximum Input Level
DH1
PRBS9
DH1
PRBS9
Δf = +10MHz (BT)
BER @ 0.1%
Δf = -5MHz (CW)
Δf = -10MHz (BT)
BER @ 0.1%
BER @ 0.1% -20 -
- -64 dBm
- -64 dBm
13) GPS receiver specication
Item Specification
Receive Frequency 1574.42 MHz ~ 1576.42 MHz
Minimum Sensitivity 1 satellite ≥-142dBm, 7 satellites ≥ -147dBm at coarse time aiding
dBm
14) NFC
Operate below 3 mode.
1) Card mode : Smart Card capability for mobile device(recognition distance : over 20mm)
2) Reader mode : Get information from tag(recognition distance : over 20mm)
3) Peer-to-peer mode : Device to device communication(recognition distance : over 5mm)
LGE Internal Use Only
- 25 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG-D821 Product SPEC
14) Current consumption
15) Current consumption
Item
1. Sleep Mode 6mA ↓ 6mA ↓ 6mA ↓ 6mA ↓
2. PERFORMANCE
Specification
LTE WCDMA GSM CDMA
2. Sleep : Ear jack
connected
3. Sleep & Idle average
4. BT Connected
Sleep& Idle
5. Talk Mode
6. No SVC Mode
7. Flight mode 6.0mA↓ 6.0mA↓ 6.0mA↓ 6.0mA↓
8. Power Off Mode 500uA ↓ 500uA ↓ 500 uA ↓ 500 uA ↓
6mA ↓ 6mA ↓ 6mA ↓ 6mA ↓
6.5mA↓
@ SCI2
9.5mA ↓ 9.5mA ↓ 9.5mA ↓ 9.5mA ↓
-Max Pwr :
850mA↓ @
Avg
-Tx 10dBm
400mA ↓
@ Avg
200mA ↓ 200mA ↓ 200mA ↓ 200mA ↓
6.5mA ↓
@ DRX 7
-Max Pwr :
500mA↓
@ Avg
- Tx 10dBm
260 mA↓
@ Avg
6.5mA ↓
@ P.P 5
GSM LVL 5
340 mA↓
@ Avg
6.5mA ↓
@ SCI2
-Max Pwr:
650mA↓
@ Avg
-Tx 10dBm
200mA ↓
@ Avg
LGE Internal Use Only
- 26 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG-D821 Product SPEC
15) Battery life time
16) Battery life time
Item Specification Test Condition
2. PERFORMANCE
Standby
(LTE)
Standby
(GSM)
Standby
(WCDMA)
Standby
(CDMA)
Voice Call
(WCDMA)
Voice Call
(GSM)
350 hours over
DRX 7 @ BATT : 2300mAh
6.5mA ↓
350 hours over
EGSM P5 @ BATT : 2300mAh
6.5mA ↓
350 hours over
DRX7 @ BATT : 2300mAh
6.5mA ↓
350 hours over
SCI2 @ BATT : 2300mAh
6.5mA ↓
530 mins over
10dBm @ BATT :2300mAh (AMR Mode)
260mA ↓
405 mins over
EGSM, LV5 @ BATT : 2300mAh
340mA ↓
153 mins over (TBD)
Voice Call (VT)
Voice Call
(LTE)
Voice Call
(CDMA)
900mA ↓ (TBD)
230 mins over
600mA ↓
690 mins over
200mA ↓
17) Charging hour
3hour 30min. under (typ. 2300mAh battery, 1.2A TA)
LGE Internal Use Only
4G , Tx:+12dBm, Speaker Mode, Max volume
@ BATT :2300mAh
LTE Cat2 @ TX 10dBm & LCD ON(Default Brightness)
10dBm @ BATT : 2300mAh
- 27 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG-D821 Product SPEC
17) RSSI indicator (Based on Cell power) :
LG-D821 Product SPEC
17) RSSI indicator (Based on Cell power) :
Specification
Unit
LTE WCDMA GSM CDMA
BAR 4->3 -85dBm±3dBm -88dBm±3dBm -90dBm±3dBm -76dBm±3dBm
Antenna
BAR
BAR 3->2 -95dBm±3dBm -96dBm±3dBm -98dBm±3dBm -86dBm±3dBm
BAR 2->1 -105dBm±3dBm -102dBm±3dBm -104dBm±3dBm -96dBm±3dBm
BAR 1->0 -115dBm±3dBm -106dBm±3dBm -108dBm±3dBm
-
101dBm±3dBm
1) WCDMA setting : Uplink ParametersMaximum Uplink Transmit Power Level(=24dBm)
2)After cell power change, at least 10sec delay is necessary before RSSI measurement.(RSSI stability)
18) Battery indicator
18) RSSI indicator (Based on Cell power) :
2. PERFORMANCE
Specification
BAR 4->3 -85dBm±3dBm -88dBm±3dBm -90dBm±3dBm -76dBm±3dBm
BAR 3->2 -95dBm±3dBm -96dBm±3dBm -98dBm±3dBm -86dBm±3dBm
BAR 2->1 -105dBm±3dBm -102dBm±3dBm -104dBm±3dBm -96dBm±3dBm
BAR 1->0 -115dBm±3dBm -106dBm±3dBm -108dBm±3dBm
1) WCDMA setting : Uplink Parameters-> Maximum Uplink Transmit Power Level(=24dBm)
2) After cell power change, at least 10sec delay is necessary before RSSI measurement.(RSSI stability)
19) Battery indicator
LTE WCDMA GSM CDMA
-
101dBm±3dBm
Unit
Antenna
BAR
Battery Bar Specification Battery Bar Specification
Bar 20(Full) 98% above Bar 9 -> Bar 8 43% -> 42%
Bar 20 -> Bar 19 98% -> 97% Bar 8 -> Bar 7 38% -> 37%
Bar 19 -> Bar 18 93% -> 92% Bar 7 -> Bar 6 33% -> 32%
Bar 18 -> Bar 17 88% -> 87% Bar 6 -> Bar 5 28% -> 27%
Bar 17 -> Bar 16 83% -> 82% Bar 5 -> Bar 4 23% -> 22%
Bar 16 -> Bar 15 78% -> 77% Bar 4 -> Bar 3 18% -> 17%
Bar 15 -> Bar 14 73% -> 72% Bar 3 -> Bar 2 13% -> 12%
Bar 14 -> Bar 13 68% -> 67% Bar 2 -> Bar 1 8% -> 7%
Bar 13 -> Bar 12 63% -> 62% Bar 1 -> Bar 0 3% -> 2%
Bar 12 -> Bar 11 58% -> 57% Power off 1% below
Bar 11 -> Bar 10 53% -> 52% Low battery pop-up 14% ,4%
Bar 10 -> Bar 9 48% -> 47%
LGE Internal Use Only
- 28 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LG-D821 Product SPEC
2.8 D821 Figures
2.7 D821 Figures
2. PERFORMANCE
LGE Internal Use Only
- 29 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
3.1 RF Component
3. TROUBLE SHOOTING
U1001
UMTS(B1,B2,B4,B8)
LTE(B1,B3,B8)
GSM Quad
MMPA
U2002
DC –DC
Convertor
U1008
UMTS(B5/B6)
LTE(B5)
U1002
B20 PAM
FL1006
B20 Tx SAW
FL1019
B7 Tx
Separator
U2000
DC –DC
Convertor
U1003
B7 PAM
LGE Internal Use Only
TOP
- 30 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
BOT
3. TROUBLE SHOOTING
U1000
Separator
FL1011
Separator
FL2003
Separator
FL1005
B20
Duplexer
DRx
FL2012
B7 DRx
Separator
FL2014
B7 DRx
SAW
U2007
B7
DRx
Separator
U2004
RF Transceiver
FL1003
B8
Duplexer
FL1001
B5/B6
B19
Duplexer
DRx SAW
FL2002/ 2001 /2000
B3/ B2 /B1,4
B1,4
DRx
Separator
Duplexer
FL2008
B20
DRx
SAW
FL1016
B7
Balun
FL1020
B1/B4
FL1013
B3
FL1014
Coupler
U2001
/B2/B3
Separator
FL1013
B2
Duplexer
SW2000
RF Switch
DRx SAW
FL2007/ 2005
B8/ B5
U2003
B5/ B8
DRx Separator
FL1015
B7 Duplexer
FL1007
B1
Duplexer
FL1012
B4
Duplexer
FL1018
Separator
SW1000
RF Switch
LGE Internal Use Only
FL13002
Separator
SW1001
RF Switch
- 31 -
SW1003
RF Switch
SW1002
RF Switch
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
RF component
Reference No. Description Reference No. Description
FL1001 B5, B6 GSM850 Duplexer FL1002 B5, B6 Low Pass Filter
FL1003 B8, GSM900 Duplexer FL1004 B8 Low Pass Filter
FL1005 B20 Duplexer FL1006 B20 Tx Saw Filter
FL1007 B1 Duplexer FL1008 B2, GSM1900 Duplexer
FL1012 B4 Duplexer FL1013 GSM 1800 Duplexer
U2005 GPS LNA FL1018
FL1020 B1, B4 Separator FL2000 B1, B4 DRx SAW Filter
FL2001 B2 DRx SAW Filter FL2003
FL2005 B5 DRx SAW Filter FL2007 B8 DRx SAW Filter
FL2008 B20 DRx SAW Filter FL2009 GPS, B7 Separator
FL2011 GPS SAW Filter U1002 B20 PAM
U1000
U1008 B5, B6 PAM U2000 DC-DC convertor
U2001 B1, B2, B4 DRx Separator U2002 DC-DC convertor (QFE1100)
U2003 B5, B6, B8 DRx Separator U2004 RF Transceiver
B5, B8, B20, GSM850, GSM900
Separator
U1001 B1, B2, B4, B8 GSM Quad MMPA
B1, B2, B4, GSM1800, GSM1900
Separator
B1, B2, B4, B5, B6, B8, B20
Separator
LGE Internal Use Only
- 32 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.2 SIGNAL PATH
WCDMA/LTE/CDMA/GSM TX ow
3. TROUBLE SHOOTING
TOP/BOT
<U1001, MMPA>
1. WCDMA, LTE B1 TX PATH
2. WCDMA B4 TX PATH
3. WCDMA B2 TX PATH
4. WCDMA B8 TX PATH
5. GSM_HB TX PATH
6. GSM_LB TX PATH
7. COMMON High Band TX/RX PATH
8. COMMON Low Band TX/RX PATH
<U1008, B5 PAM>
9.WCDMA, LTE B5 / WCDMA B6 / TX PATH
<U1002, B20 PAM>
10. LTE B20 TX PATH
<U1003, B7 PAM>
11. LTE B7 TX PATH
LGE Internal Use Only
TOP
- 33 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
LGE Internal Use Only
BOT
- 34 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- WCDMA/LTE/CDMA/GSM PRX ow
3. TROUBLE SHOOTING
LGE Internal Use Only
1. WCDMA, LTE B1 PRX PATH
2. WCDMA B4 PRX PATH
3. WCDMA B2 / GSM 1900 PRX PATH
4. WCDMA, LTE B8 / GSM900 PRX PATH
5. LTE B3 / GSM 1800 PRX PATH
6. COMMON High Band TX/RX PATH
7. COMMON Low Band TX/RX PATH
8. WCDMA, LTE B5 / WCDMA B6 / GSM850 PRX PATH
9. LTE B20 PRX PATH
10. LTE B7 TX PATH
- 35 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- WCDMA/LTE/CDMA DRX ow
3. TROUBLE SHOOTING
LGE Internal Use Only
1. WCDMA, LTE B1 / WCDMA B4 DRX PATH
2. WCDMA B2 DRX PATH
3. WCDMA, LTE B8 DRX PATH
4. WCDMA, LTE B5 / WCDMA B6 DRX PATH
5. LTE B20 DRX PATH
6. LTE B7 DRX PATH
- 36 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
3.3 Checking XO Block
The output frequency (19.2MHz) of XO (X6000) is used as the reference one of WTR1605L(U2004) and PM8941(U6002)
nternal VCO.
TP2
U2004
BOT
TOP
TP1
X6000
LGE Internal Use Only
- 37 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
13'1/21
3. TROUBLE SHOOTING
R6031
DNI
C6027
0.1u
XO_IN
VTUNE_PRX
C6028
1n
120
79
X6000
1RAA19200AAA
EAW62063901
SENSOR XTAL2
XTAL1 GND1
19.2MHz
TP2
34
21
C2027
100p
DNIC2078
TP1
R2017
R6032DNI
DNI R6033
0
DNI(100K,1%)
DNI(0 ohm)
XO_OUT_A0
LGE Internal Use Only
Schematic of the Crystal Part (19.2MHz)
- 38 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check TP1
3. TROUBLE SHOOTING
1.9 .2 MHz Single
Yes
Check TP2
19.2MHz Signal
Yes
XO OK
No
Check the X6000
No
Check the U6002
LGE Internal Use Only
- 39 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.4 Checking RF Front-end Separator
3.4.1 FL1018 (High Band)
Check the supply voltage and control level for FL1018/U1000
3. TROUBLE SHOOTING
TP3
TP1
FL1018
Separator
TP2
TRX_ANT2
33pC1079
TX_GSM_HB
L1054
DNI
11
10
9
8
7
6
12
ANT
GND3
TX1LB
TX2HB
LMSP32QP-F03
GND2
TRX8
5
BOT
134
14
TRX6
GND4
FL1018
EAT61793601
TRX10
GND1 TRX7
TRX9
3
2 15
TRX5TRX1
16
1
TRX4
TRX2
17
22
VDD
GND5
SDATA
SCLK
GND6
TRX3
TX_B41
RX_B41
VIO
18
19
20
21
23
+2V95_VREG_L16
TRX_B7
RFFE2_DATA
RFFE2_CLK
TRX_B4
TRX_B1
TRX_B3
TRX_B2_B25
+1V8_VREG_S3A_RF
TP2
TP1
C1081100p
100p C1080
TP3
LGE Internal Use Only
- 40 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.4.2 U1000 (Low Band)
+2V95_VREG_L16
Check the supply voltage and control level for FL1018/U1000
3. TROUBLE SHOOTING
TP1
TP2
U1000
Separator
GND
BOT
TP1
100pC1025
TX_GSM_LB
+1V8_VREG_S3A_RF
10pC1023
TP2
TRX_ANT1
LGE Internal Use Only
C1016 33p
L1013
DNI
21
207
191817
TXLB
TXHB
GND4
1
ANT
2
NC1
3
TRX6
4
TRX5
5
6
TRX4
GND1
EAT61914101
U1000
RF1492A
VDD GND3
VIO
8
9
GND2
16
NC4
15
NC3
14
NC2
13
TRX1
12
TRX2
11
TRX3
SCLK
SDATA
TRX_B17
TRX_B8
TRX_B5_B26
10
TP3
- 41 -
R1015 0
R1016
0
4/4_QCT_R-013551
RFFE2_CLK
RFFE2_DATA
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check TP1
3. TROUBLE SHOOTING
TP1 > 2.95V
Yes
Check TP2
TP2 > 1.8V
Yes
Check TP3
TP3 Signal?
Yes
No
No
No
Check the Power ON
Check the PM8941
Check the FL1018
Check the U1000
LGE Internal Use Only
RF Path Open
- 42 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5 Checking RF Block
3. TROUBLE SHOOTING
START
Check XO (19.2MHz) Block
Refer to 4.3
Check the FL1018/U1000
Refer to 3.4
Check Tx/ Rx Level
Re-Download & Cal.
Change the Board
LGE Internal Use Only
- 43 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.1 Checking XO (19.2MHz) Block
Refer to 3.3
3.5.2 Checking the FL1018/ U1000
Refer to 3.4
3.5.3 Checking RF TX Level
<ACPM-7600 PAM>
3.5.3.1 WCDMA, LTE B1
3. TROUBLE SHOOTING
TP1
TP3
TP2
LGE Internal Use Only
BOT TOP
- 44 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
W_FL2-R-SMT-1_80
TX_PA_OUT_B1
TX_PA_OUT_B3
TX_PA_OUT_B4
EAG63412001
ANTG3
G2
SW1002
G1
8.2nL1005
27nL1009
L1000 DNI
TP2
C1022 1.5n
DNIL1015
TRX_ANT2
CPL_CPL
C1114 100p
DNI
DNI
20549-001E
ANT
1
SW1003
G3 G4
43
EAG63293301
COMMON
FL1014
Termination_Port
ECA30240001
Coupling
GND2
R1011
6
5
49.9
4
13.04.25 changed
LDJ18829M24AD011
1
IN
2
GND1
2
22pC1071
3
OUT
L1048
100n
TP1
L1073
L1074
TP3
B1
100pC1000
12n
L1001
3.9pC1006
B3
DNIL1006
B4
3pC1015
L1010 DNI
B2/B25
L1016 DNI
VPA_GSM
100n
C1011
DNI
C1012
VPA
0
R1002
0
R1020
R1023
5.1
Closed to PA
2
C1102 100p
1
4/4_QCT_R-013547
35
RFOUT_B1
34
RFOUT_B3
33
RFOUT_B4
32
RFOUT_B2
31
RFOUT_B5_B26
30
GND14
4/4_QCT_R-013545
1nC1117
RC snubber
49.9
R1001
36
GND15
GND16
GND17
CPL_OUT
U1001
ACPM-7600-TR1
EAN62765801
GND19
GND18
RFIN_B1_B2
RFIN_B3_B4
RFIN_B5_B8
PGND
GND20
RFIN_B26
GND1
GND2
C1003
33p
L1003
DNI
C1013
33p
DNI
DNI
C1021
33p
L1014
DNI
BC1, B1, B2, B25
TX_OUT_MB3
B3, B4
C1014
TX_OUT_MB2
33p
L1008
B5, B6, B19, B26, BC0, BC10
ING3
G1NC
C1017
OUTG2
FL1002
33p
4 3
5 2
6 1
EAM62691501
LFL18829MTCRD627
C1018
L1012
DNI
TX_OUT_LB4
33p
VPA_BATT
1n
10u
C1007
C1103
43424140393738
VIO
1
2
3
4
5
6
7
+1V8_VREG_S3A_RF
C1002
33p
C1020
LGE Internal Use Only
- 45 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
First, Check the conducted Max. Power using the RF Connector
Check the FL1018
3. TROUBLE SHOOTING
Check TP1
Over 21 dBm?
No
Check TP2
Over 21 dBm?
No
Check TP3
Over -3 dBm?
No
Check U2004
(WTR1605L)
Yes
RF TX Level is OK
Yes
Check FL1007 (B1 Duplexer)
Yes
Check U1001(PAM)
LGE Internal Use Only
- 46 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.3.2 WCDMA B2
3. TROUBLE SHOOTING
TP3
TP1
BOT TOP
TP2
LGE Internal Use Only
- 47 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
W_FL2-R-SMT-1_80
TX_PA_OUT_B1
TX_PA_OUT_B3
TX_PA_OUT_B4
TX_PA_OUT_B2_B25
EAG63412001
ANTG3
G2
SW1002
G1
TRX_ANT2
CPL_CPL
C1114 100p
DNI
L1073
DNI
L1074
20549-001E
ANT
1
SW1003
G3 G4
43
EAG63293301
COMMON
TP1
2
L1048
100n
22pC1071
LDJ18829M24AD011
1
IN
2
GND1
3
OUT
FL1014
Termination_Port
ECA30240001
Coupling
GND2
R1011
6
5
49.9
4
13.04.25 changed
TP3
B1
100pC1000
12n
L1001
L1000 DNI
3.9pC1006
C1022 1.5n
DNIL1015
3pC1015
B3
DNIL1006
B4
L1010 DNI
B2/B25
L1016 DNI
8.2nL1005
27nL1009
TP2
VPA_GSM
100n
C1011
DNI
C1012
VPA
0
R1002
0
R1020
R1023
5.1
Closed to PA
2
C1102 100p
1
4/4_QCT_R-013547
35
RFOUT_B1
34
RFOUT_B3
33
RFOUT_B4
32
RFOUT_B2
31
RFOUT_B5_B26
30
GND14
4/4_QCT_R-013545
1nC1117
RC snubber
49.9
R1001
36
GND15
GND16
GND17
CPL_OUT
U1001
ACPM-7600-TR1
EAN62765801
GND19
GND18
RFIN_B1_B2
RFIN_B3_B4
RFIN_B5_B8
PGND
GND20
RFIN_B26
GND1
GND2
VPA_BATT
1n
10u
C1007
C1103
43424140393738
VIO
1
2
3
4
5
6
7
+1V8_VREG_S3A_RF
C1002
33p
C1020
BC1, B1, B2, B25
C1003
33p
L1003
DNI
C1013
33p
L1008
DNI
DNI
C1021
33p
L1014
DNI
TX_OUT_MB3
C1014
33p
B3, B4
TX_OUT_MB2
B5, B6, B19, B26, BC0, BC10
ING3
G1NC
OUTG2
FL1002
4 3
5 2
LFL18829MTCRD627
6 1
EAM62691501
C1018
C1017
33p
33p
L1012
DNI
TX_OUT_LB4
LGE Internal Use Only
- 48 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check the FL1018
3. TROUBLE SHOOTING
Check TP1
Over 21 dBm?
No
Check TP2
Over 21 dBm?
No
Check TP3
Over -3 dBm?
No
Check U2004
(WTR1605L)
Yes
RF TX Level is OK
Yes
Check FL1008 (B2 Duplexer)
Yes
Check U1001(PAM)
LGE Internal Use Only
- 49 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.3.3 WCDMA B4
3. TROUBLE SHOOTING
TP3
TP1
BOT TOP
TP2
LGE Internal Use Only
- 50 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
W_FL2-R-SMT-1_80
TX_PA_OUT_B1
TX_PA_OUT_B3
TX_PA_OUT_B4
TX_PA_OUT_B2_B25
EAG63412001
ANTG3
G2
SW1002
G1
33p
TRX_ANT2
CPL_CPL
TX_OUT_LB4
TP1
SW1003
G3 G4
R1023
5.1
Closed to PA
2
1
35
RFOUT_B1
34
RFOUT_B3
33
RFOUT_B4
32
RFOUT_B2
31
RFOUT_B5_B26
30
GND14
EAG63293301
COMMON
43
4/4_QCT_R-013545
1nC1117
RC snubber
49.9
R1001
36
GND15
GND16
GND17
CPL_OUT
U1001
ACPM-7600-TR1
EAN62765801
GND19
GND18
RFIN_B1_B2
RFIN_B3_B4
RFIN_B5_B8
2
PGND
GND20
RFIN_B26
GND1
GND2
L1048
100n
VPA_BATT
1n
10u
C1007
C1103
43424140393738
VIO
1
2
3
4
5
6
7
+1V8_VREG_S3A_RF
VPA_GSM
100n
C1011
DNI
L1074
20549-001E
ANT
1
VPA
0
R1002
DNI
C1012
0
4/4_QCT_R-013547
R1020
C1102 100p
C1114 100p
DNI
L1073
B1
100pC1000
12n
L1001
L1000 DNI
3.9pC1006
C1022 1.5n
DNIL1015
3pC1015
B3
DNIL1006
B4
L1010 DNI
B2/B25
L1016 DNI
TP2
8.2nL1005
27nL1009
22pC1071
LDJ18829M24AD011
1
IN
2
GND1
3
OUT
TP3
C1002
C1003
33p
33p
L1003
DNI
C1013
33p
C1021
C1020
33p
L1014
DNI
ECA30240001
Coupling
FL1014
GND2
Termination_Port
BC1, B1, B2, B25
TX_OUT_MB3
B3, B4
C1014
TX_OUT_MB2
33p
L1008
DNI
DNI
B5, B6, B19, B26, BC0, BC10
ING3
G1NC
OUTG2
FL1002
4 3
5 2
6 1
EAM62691501
LFL18829MTCRD627
R1011
6
5
49.9
4
13.04.25 changed
C1018
C1017
33p
L1012
DNI
LGE Internal Use Only
- 51 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check the FL1018
3. TROUBLE SHOOTING
Check TP1
Over 21 dBm?
No
Check TP2
Over 21 dBm?
No
Check TP3
Over -3 dBm?
No
Check U2004
(WTR1605L)
Yes
RF TX Level is OK
Yes
Check FL1012 (B4 Duplexer)
Yes
Check U1001(PAM)
LGE Internal Use Only
- 52 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.3.4 WCDMA B8
3. TROUBLE SHOOTING
TP3
TP1
BOT TOP
TP2
LGE Internal Use Only
- 53 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
EAG63412001
ANTG3
G2
SW1000
G1
W_FL2-R-SMT-1_80
TX_PA_OUT_B1
TX_PA_OUT_B3
TX_PA_OUT_B4
TX_PA_OUT_B2_B25
TX_PA_OUT_B5_B26_BC0_BC10_ET
TX_PA_OUT_B8
DNIL1071
L1000 DNI
8.2nL1005
27nL1009
L1019 DNI
L1022 2.2p
DNIL1015
C1031
100pC1000
3.9pC1006
C1022 1.5n
DNI
C1032 5.6n
33pC1113
B1
12n
L1001
B3
DNIL1006
B4
3pC1015
L1010 DNI
B2/B25
L1016 DNI
B5/B6/B19/B26
BC0/BC10
2.7p
L1021
1.5pL1023
TP2
L1072 DNI
B8
SW1001
ANT COMMON
1
G3 G4
VPA
VPA_GSM
0
100n
R1002
DNI
C1102 100p
C1011
C1012
0
4/4_QCT_R-013547
R1020
20549-001E
EAG63293301
43
R1023
5.1
Closed to PA
2
1
35
RFOUT_B1
34
RFOUT_B3
33
RFOUT_B4
32
RFOUT_B2
31
RFOUT_B5_B26
30
GND14
29
RFOUT_B8
28
VCC1
27
VCC2
26
VCC_GSM
25
GND13
24
RFOUT_GSM_HB
23
GND12
22
RFOUT_GSM_LB
2
4/4_QCT_R-013545
1nC1117
RC snubber
49.9
R1001
36
GND15
GND16
GND17
CPL_OUT
U1001
ACPM-7600-TR1
EAN62765801
GND11
GND8
GND9
GND10
202119
PGND
GND19
GND20
GND18
RFIN_B1_B2
RFIN_B3_B4
RFIN_B26
RFIN_B5_B8
SDATA
VBATT
RFIN_GSM_HB
RFIN_GSM_LB
GND6
GND5
GND7
16
17
15218
L1002
100n
43424140393738
GND1
VIO
GND2
SCLK
GND3
GND4
C1001
1n
C1103
1
3
4
5
6
7
8
9
10
11
12
13
14
TP1
VPA_BATT
10u
C1007
1n
+1V8_VREG_S3A_RF
0R1003
0
R1004
R1026
1K
LDJ18829M24AD011
1
IN
2
GND1
3
OUT
C1002
33p
L1003
DNI
C1020
33p
RFFE1_CLK
RFFE1_DATA
C1030
33p
ECA30240001
Coupling
FL1000
GND2
Termination_Port
BC1, B1, B2, B25
C1003
TX_OUT_MB3
33p
C1014
C1013
33p
33p
L1008
DNI
DNI
C1021
L1014
DNI
L1020
DNI
6
5
4
B3, B4
TX_OUT_MB2
CPL_CPL
B5, B6, B19, B26, BC0, BC10
ING3
G1NC
OUTG2
FL1002
4 3
3
2
G1
OUT
FL1004
NC
G2
5
4
5 2
6 1
EAM62691501
LFL18829MTCRD627
1
IN
G3
EAM62691501
6
LFL18829MTCRD627
C1018
C1017
33p
33p
L1012
DNI
B8
C1029
C1028
33p
33p
L1018
DNI
TP3
1800, 1900
C1034
C1033
33p
33p
1p
L1024
TRX_ANT1
CPL_PDET_IN
TX_OUT_LB4
TX_OUT_LB3
TX_OUT_MB4
LGE Internal Use Only
- 54 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check the U1000
3. TROUBLE SHOOTING
Check TP1
Over 21 dBm?
No
Check TP2
Over 21 dBm?
No
Check TP3
Over -3 dBm?
No
Check U2004
(WTR1605L)
Yes
RF TX Level is OK
Yes
Check FL1003 (B8 Duplexer)
Yes
Check U1001(PAM)
LGE Internal Use Only
- 55 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.3.5 GSM Low Band(GSM850, 900)
3. TROUBLE SHOOTING
TP3
TP1
TP2
BOT TOP
LGE Internal Use Only
- 56 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
B3
EAG63412001
ANTG3
G2
SW1000
G1
W_FL2-R-SMT-1_80
TX_PA_OUT_B3
TX_PA_OUT_B4
TX_PA_OUT_B2_B25
TX_PA_OUT_B5_B26_BC0_BC10_ET
TX_PA_OUT_B8
TX_GSM_HB
TX_GSM_LB
8.2nL1005
27nL1009
L1019 DNI
L1022 2.2p
DNIL1071
C1022 1.5n
DNIL1015
C1031
C1032 5.6n
C1040 15p
DNIL1026
33pC1113
3.9pC1006
DNIL1006
3pC1015
L1010 DNI
L1016 DNI
B5/B6/B19/B26
DNI
2.7p
L1021
1.5pL1023
12n
L1027
C1049 3.3n
L1072 DNI
B4
B2/B25
BC0/BC10
B8
GSM_HB
GSM_LB
SW1001
20549-001E
ANT COMMON
1
G3 G4
43
2
EAG63293301
C1001
L1002
100n
GND16
GND9
GND17
GND8
GND19
GND20
GND18
RFIN_B1_B2
RFIN_B3_B4
RFIN_B26
RFIN_B5_B8
SDATA
VBATT
RFIN_GSM_HB
RFIN_GSM_LB
GND6
GND5
GND7
16
17
15218
1n
C1103
43424140393738
PGND
1
3
4
5
GND1
6
VIO
7
GND2
8
SCLK
9
10
GND3
11
12
GND4
13
14
Closed to PA
2
1
35
RFOUT_B1
34
RFOUT_B3
33
RFOUT_B4
32
RFOUT_B2
31
RFOUT_B5_B26
30
GND14
29
RFOUT_B8
28
VCC1
27
VCC2
26
VCC_GSM
25
GND13
24
RFOUT_GSM_HB
23
GND12
22
RFOUT_GSM_LB
R1001
36
GND15
CPL_OUT
U1001
ACPM-7600-TR1
EAN62765801
GND11
GND10
202119
0
100n
R1002
DNI
C1012
R1020
C1102 100p
0
4/4_QCT_R-013547
C1011
49.9
Need to change, ACPM-7600(APT+ET)
LDJ18829M24AD011
1n
1
2
3
TP1
10u
C1007
+1V8_VREG_S3A_RF
C1020
0R1003
RFFE1_CLK
0
RFFE1_DATA
R1004
R1026
1K
TX_PA_IN_B5_B26_BC0_BC10_APT
IN
GND1
OUT
33p
C1030
33p
FL1000
C1013
C1021
L1014
DNI
Coupling
Termination_Port
C1014
33p
33p
L1008
DNI
DNI
L1020
DNI
C1130
33p
ECA30240001
6
5
GND2
4
B3, B4
TX_OUT_MB2
B5, B6, B19, B26, BC0, BC10
ING3
G1NC
OUTG2
FL1002
4 3
3
2
G1
OUT
FL1004
NC
G2
5
4
5 2
6 1
EAM62691501
LFL18829MTCRD627
1
IN
G3
EAM62691501
6
LFL18829MTCRD627
C1018
C1017
33p
33p
L1012
DNI
C1029
C1028
33p
33p
L1018
DNI
C1034
C1033
33p
33p
1p
L1024
C1041
C1042
33p
33p
L1028
DNI
TRX_ANT1
CPL_PDET_IN
CPL_CPL
TX_OUT_LB4
B8
TX_OUT_LB3
1800, 1900
TX_OUT_MB4
850, 900
TX_OUT_LB2
TP3
LGE Internal Use Only
L1034 1.5p
L1035 DNI
TP2
- 57 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check the U1000
3. TROUBLE SHOOTING
Check TP1
Over 31 dBm?
No
Check TP2
Over 31 dBm?
No
Check TP3
Over -3 dBm?
No
Check U2004
(WTR1605L)
Yes
Yes
Yes
RF TX Level is OK
Check U1000
(Low Band FEM)
Check U1001(PAM)
LGE Internal Use Only
- 58 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.3.6 GSM High Band(GSM1800, 1900)
3. TROUBLE SHOOTING
TP3
TP2
TP1
BOT TOP
LGE Internal Use Only
- 59 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
B3
EAG63412001
ANTG3
G2
SW1002
G1
W_FL2-R-SMT-1_80
TX_PA_OUT_B3
TX_PA_OUT_B4
TX_PA_OUT_B2_B25
TX_PA_OUT_B5_B26_BC0_BC10_ET
TX_PA_OUT_B8
TX_GSM_HB
TX_GSM_LB
8.2nL1005
27nL1009
L1019 DNI
L1022 2.2p
C1022 1.5n
DNIL1015
C1031
C1032 5.6n
C1040 15p
DNIL1026
C1114 100p
DNI
L1073
3.9pC1006
DNIL1006
3pC1015
L1010 DNI
L1016 DNI
B5/B6/B19/B26
DNI
2.7p
L1021
1.5pL1023
12n
L1027
C1049 3.3n
B4
B2/B25
BC0/BC10
B8
GSM_HB
TP2
GSM_LB
DNI
L1074
G3 G4
0
R1002
0
R1020
EAG63293301
COMMON
SW1003
43
Closed to PA
2
C1102 100p
1
4/4_QCT_R-013547
35
RFOUT_B1
34
RFOUT_B3
33
RFOUT_B4
32
RFOUT_B2
31
RFOUT_B5_B26
30
GND14
29
RFOUT_B8
28
VCC1
27
VCC2
26
VCC_GSM
25
GND13
24
RFOUT_GSM_HB
23
GND12
22
RFOUT_GSM_LB
TP1
49.9
R1001
36
GND15
CPL_OUT
U1001
ACPM-7600-TR1
EAN62765801
GND11
GND10
202119
GND16
GND9
2
GND17
GND8
GND19
GND20
GND18
RFIN_B1_B2
RFIN_B3_B4
RFIN_B26
RFIN_B5_B8
SDATA
VBATT
RFIN_GSM_HB
RFIN_GSM_LB
GND6
GND5
GND7
16
17
15218
L1048
100n
1n
C1103
43424140393738
PGND
1
3
4
5
GND1
6
VIO
7
GND2
8
SCLK
9
10
GND3
11
12
GND4
13
14
20549-001E
ANT
1
100n
C1011
DNI
C1012
Need to change, ACPM-7600(APT+ET)
LDJ18829M24AD011
1
2
22pC1071
10u
C1007
+1V8_VREG_S3A_RF
R1004
R1026
TX_PA_IN_B5_B26_BC0_BC10_APT
3
C1020
0R1003
RFFE1_CLK
0
RFFE1_DATA
1K
IN
GND1
OUT
33p
C1030
33p
FL1014
Termination_Port
C1013
33p
DNI
DNI
C1021
L1014
DNI
L1020
DNI
C1014
33p
L1008
C1130
33p
ECA30240001
R1011
6
Coupling
5
GND2
49.9
4
CPL_CPL
13.04.25 changed
B3, B4
TX_OUT_MB2
B5, B6, B19, B26, BC0, BC10
ING3
G1NC
OUTG2
FL1002
4 3
3
2
G1
OUT
FL1004
NC
G2
5
4
5 2
6 1
EAM62691501
LFL18829MTCRD627
1
IN
G3
EAM62691501
6
LFL18829MTCRD627
TP3
C1018
C1017
33p
33p
L1012
DNI
B8
C1029
C1028
33p
33p
L1018
DNI
1800, 1900
C1034
C1033
33p
33p
1p
L1024
C1042
33p
L1028
DNI
850, 900
C1041
33p
TRX_ANT2
TX_OUT_LB4
TX_OUT_LB3
TX_OUT_MB4
TX_OUT_LB2
LGE Internal Use Only
L1034 1.5p
L1035 DNI
- 60 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check the U1000
3. TROUBLE SHOOTING
Check TP1
Over 31 dBm?
No
Check TP2
Over 31 dBm?
No
Check TP3
Over -3 dBm?
No
Check U2004
(WTR1605L)
Yes
Yes
Yes
RF TX Level is OK
Check FL1018
(High Band FEM)
Check U1001(PAM)
LGE Internal Use Only
- 61 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.3.7 WCDMA LTE B5
<ACPM-5805 PAM>
EAG63412001
ANTG3
G2
SW1000
G1
W_FL2-R-SMT-1_80
DNIL1071
3. TROUBLE SHOOTING
TP1
SW1001
20549-001E
43
2
EAG63293301
33pC1113
L1072 DNI
ANT COMMON
1
G3 G4
L1002
100n
C1001
1n
LDJ18829M24AD011
1
IN
2
GND1
3
OUT
FL1000
Termination_Port
ECA30240001
Coupling
GND2
6
5
4
TRX_ANT1
CPL_PDET_IN
CPL_CPL
TX_PA_OUT_B5_B26_BC0_BC10_APT
+1V8_VREG_S3A_RF
TP2
L1068 6.8n
L1069
DNI
'13.06.03_QCT
VPA_GSM
C1098
C1093
2.2p
2.2u
R1014 49.9
C1097
10n
ACPM-5805-TR2
EAN62698501
U1008
VEN
VMODEGND
NCISO
RFINRFOUT
VCC1VCC2
CPL
6
7 4
8 3
9 2
10 1
PGND
11
5
VPA_BATT
C1094
C1099
330p
2.2u
C1095
100p
PA_ON0_B26
PA0_R1_B26
C1091
C1096
100p
TP3
33pC1092
33p
L1067
DNI
TX_PA_IN_B5_B26_BC0_BC10_APT
LGE Internal Use Only
- 62 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TP3
3. TROUBLE SHOOTING
TP2
TP1
BOT TOP
LGE Internal Use Only
- 63 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check the U1000
3. TROUBLE SHOOTING
Check TP1
Over 21 dBm?
No
Check TP2
Over 21 dBm?
No
Check TP3
Over -3 dBm?
No
Check U2004
(WTR1605L)
Yes
Yes
Yes
RF TX Level is OK
Check FL1001
(B5 Duplexer)
Check U1001(PAM)
LGE Internal Use Only
- 64 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.3.8 LTE B3
3. TROUBLE SHOOTING
TP3
TP1
TP2
BOT TOP
LGE Internal Use Only
- 65 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
W_FL2-R-SMT-1_80
TX_PA_OUT_B1
TX_PA_OUT_B3
TX_PA_OUT_B4
TX_PA_OUT_B2_B25
EAG63412001
ANTG3
G2
SW1002
G1
TP1
LDJ18829M24AD011
1
IN
2
GND1
3
OUT
C1002
C1003
33p
33p
L1003
DNI
C1013
33p
TP3
DNI
C1021
C1020
33p
L1014
DNI
SW1003
G3 G4
R1023
5.1
Closed to PA
2
1
35
RFOUT_B1
34
RFOUT_B3
33
RFOUT_B4
32
RFOUT_B2
31
RFOUT_B5_B26
30
GND14
EAG63293301
COMMON
43
4/4_QCT_R-013545
1nC1117
RC snubber
49.9
R1001
36
GND15
GND16
GND17
CPL_OUT
U1001
ACPM-7600-TR1
EAN62765801
GND19
GND18
RFIN_B1_B2
RFIN_B3_B4
RFIN_B5_B8
2
PGND
GND20
RFIN_B26
GND1
GND2
22pC1071
L1048
100n
VPA_BATT
1n
10u
C1007
C1103
43424140393738
VIO
1
2
3
4
5
6
7
+1V8_VREG_S3A_RF
VPA_GSM
100n
C1011
DNI
L1074
20549-001E
ANT
1
VPA
0
R1002
DNI
C1012
0
4/4_QCT_R-013547
R1020
C1102 100p
C1114 100p
DNI
L1073
B1
100pC1000
12n
L1001
L1000 DNI
3.9pC1006
C1022 1.5n
DNIL1015
3pC1015
B3
DNIL1006
B4
L1010 DNI
B2/B25
L1016 DNI
TP2
8.2nL1005
27nL1009
ECA30240001
6
Coupling
FL1014
Termination_Port
GND2
5
4
BC1, B1, B2, B25
TX_OUT_MB3
B3, B4
C1014
TX_OUT_MB2
33p
L1008
DNI
B5, B6, B19, B26, BC0, BC10
ING3
G1NC
C1017
OUTG2
FL1002
33p
4 3
5 2
6 1
EAM62691501
LFL18829MTCRD627
R1011
49.9
13.04.25 changed
C1018
L1012
DNI
CPL_CPL
33p
TRX_ANT2
TX_OUT_LB4
LGE Internal Use Only
- 66 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
First, Check the conducted Max. Power using the RF Connector
Check the FL1018
3. TROUBLE SHOOTING
Check TP1
Over 21 dBm?
No
Check TP2
Over 21 dBm?
No
Check TP3
Over -3 dBm?
No
Check U2004
(WTR1605L)
Yes
Yes
Yes
RF TX Level is OK
Check FL1013
(B3 Duplexer)
Check U1001(PAM)
LGE Internal Use Only
- 67 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.3.9 LTE B7
3. TROUBLE SHOOTING
TP1
TP3
BOT TOP
TP2
LGE Internal Use Only
- 68 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
EAG63412001
ANTG3
G2
SW1002
G1
W_FL2-R-SMT-1_80
4/4_QCT_R-013552
VPA_BATT
C1114 100p
DNI
L1073
VPA_GSM
2.2uC1119
20549-001E
ANT
1
SW1003
G3 G4
DNI
L1074
VPA_GSM
'13.06.04 APT ONLY
0
R1022
Closed to PA
1nC1107
EAG63293301
COMMON
43
TP1
FL1014
Termination_Port
ECA30240001
Coupling
GND2
R1011
6
5
49.9
4
13.04.25 changed
LDJ18829M24AD011
1
IN
2
GND1
2
22pC1071
L1048
100n
3
OUT
TRX_ANT2
CPL_CPL
DNIL1051
C1074
100pC1108
5.6p
TP2
10uC1106
L1052 DNI
0
R1021
4/4_QCT_R-013552
1
10
3
9 2
7
11
B7 PA
VCC1
VCC2
U1003
VBAT
ACPM-9307-TR1
EAN62867801
GND
PGND
+1V8_VREG_S3A_RF
4
VIO
6
SCLK
RFINRFOUT
SDTA
NC
5
8
RFFE1_DATA
RFFE1_CLK
TP3
33pC1075
3nC1076
TX_PA_IN_B7
L1053 1p
LGE Internal Use Only
- 69 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check the FL1018
3. TROUBLE SHOOTING
Check TP1
Over 21 dBm?
No
Check TP2
Over 21 dBm?
No
Check TP3
Over -3 dBm?
No
Check U2004
(WTR1605L)
Yes
Yes
Yes
RF TX Level is OK
Check FL1015
(B7 Duplexer)
Check U1003(PAM)
LGE Internal Use Only
- 70 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.3.10 LTE B20
3. TROUBLE SHOOTING
TP2
TP1
TP3
BOT TOP
LGE Internal Use Only
- 71 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
EAG63412001
ANTG3
G2
SW1000
G1
W_FL2-R-SMT-1_80
DNIL1071
3. TROUBLE SHOOTING
TP1
SW1001
20549-001E
43
2
EAG63293301
33pC1113
L1072 DNI
ANT COMMON
1
G3 G4
L1002
100n
C1001
1n
LDJ18829M24AD011
1
IN
2
GND1
3
OUT
FL1000
Termination_Port
ECA30240001
Coupling
GND2
6
5
4
VPA
RC snubber
TRX_ANT1
CPL_PDET_IN
CPL_CPL
VPA_BATT
C103510u
C1112 100p
L1031
DNI
TP2
R1019
5.1
4/4_QCT_R-013571
0
R1017
0
R1018
Closed to PA
21
1
VCC1
10
VCC2
3
9 2
7
11
VBAT
EAN62867601
GND
PGND
U1002
RF8020
1nC1118
DNIC1036
DNIC1038
VIO
SCLK
RFINRFOUT
SDTA
NC
+1V8_VREG_S3A_RF
4
6
5
8
0R1012
R1013 0
100pC1037
RFFE1_CLK
RFFE1_DATA
TP3
C1046
33p
L1032
DNI
LGE Internal Use Only
B20 PA
- 72 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check the U1000
3. TROUBLE SHOOTING
Check TP1
Over 21 dBm?
No
Check TP2
Over 21 dBm?
No
Check TP3
Over -3 dBm?
No
Check U2004
(WTR1605L)
Yes
Yes
Yes
RF TX Level is OK
Check FL1005
(B20 Duplexer)
Check U1002(PAM)
LGE Internal Use Only
- 73 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.4 Checking RF Rx Level
3.5.4.1 WCDMA B1/ LTE B1
3. TROUBLE SHOOTING
TP4
BOT
TP2
TP3
FL1018
TP1
LGE Internal Use Only
- 74 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
W_FL2-R-SMT-1_80
TRX_B1
TRX_B4
EAG63412001
G2
SW1002
G1
TP2
C1065 1n
ANTG3
C1052 1.8n
TRX_ANT2
CPL_CPL
C1114 100p
DNI
L1073
DNI
L1074
20549-001E
ANT
1
SW1003
G3 G4
43
EAG63293301
COMMON
TP1
2
L1048
100n
22pC1071
LDJ18829M24AD011
1
IN
2
GND1
3
OUT
FL1014
Termination_Port
ECA30240001
Coupling
GND2
R1011
6
5
49.9
4
13.04.25 changed
TX_PA_OUT_B1
C1122 3.3n
+2V95_VREG_L16
B1
6
2
4
L1038 3.3n
EAM62930901B8575
ANT
TX_IN
FL1007
RX_OUT1
RX_OUT2
GND1
GND2
GND4
GND3 GND5
3
1
8
7
95
22n L1084
B4
ACMD-4104-TR1
DNIL1045
2
EAM62791401
ANT
FL1012
RX1
GND1
GND2 GND5
GND3 GND4
RX2
36
TX
1
8
94
75
TX_PA_OUT_B4
L1081
8.2n
C1125 10p
10pC1124
TP3
3.3nC1123
XM0831SZ
PORT3+
GND1
GND2
PORT2-
EAM62493001
PORT3-
FL1020
PORT1-
PORT1+
Path
PRX_B4(P2)
PRX_B1(P3)
VDD
CTLPORT2+
10
9
8
7
C1121
100p
VDD VCTL
H
H
1
2
3
4
5 6
TX_B41
C1063
100p
TP4
PRX_B1_B4_SEL
L
H
+2V95_VREG_L16
C1056 33p
L1039
6.8n
C1061 33p
PRX_MB3_IN_P
PRX_MB3_IN_N
+1V8_VREG_S3A_RF
TRX_ANT2
LGE Internal Use Only
33pC1079
TX_GSM_HB
L1054
DNI
11
10
9
8
7
6
12
ANT
GND3
TX1LB
TX2HB
LMSP32QP-F03
GND2
TRX8
5
134
14
TRX6
TRX5TRX1
GND4
FL1018
FL1018
EAT61793601
TRX10
GND1 TRX7
TRX9
2 15
3
- 75 -
16
1
TRX4
TRX2
17
22
GND5
SDATA
SCLK
GND6
TRX3
TRX_B7
RX_B41
100p C1080
VDD
18
VIO
19
20
21
RFFE2_DATA
RFFE2_CLK
23
TRX_B4
TRX_B1
TRX_B3
TRX_B2_B25
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C1081100p
Check TP1
3. TROUBLE SHOOTING
Check TP1
Signal Exist?
Check TP2
Signal Exist?
Check TP3
Signal Exist?
Check TP4
Signal Exist?
Yes
Yes
Yes
Yes
No
No
No
No
Check the RX Level
Check the FL1018
Check the FL1007
(B1 Duplexer)
Check the FL1020
(B1/4 Separator)
LGE Internal Use Only
Check the U2004
(WTR1605L-1)
- 76 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.4.2 WCDMA B2/ PCS1900
3. TROUBLE SHOOTING
TP3
BOT
TP2
FL1018
TP1
LGE Internal Use Only
- 77 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
EAG63412001
G2
G1
W_FL2-R-SMT-1_80
TRX_B2_B25
SW1002
ANTG3
TP2
C1114 100p
DNI
L1073
DNI
L1074
B2/B25/BC1/G1900
2.7n
C1053
DNIL1037
ANT
FL1008
ACMD-6125
EAM62930201
GND1 GND6
GND2 GND5
GND3 GND4
20549-001E
ANT
1
SW1003
G3 G4
TP3
16
RX
3
TX
92
84
75
EAG63293301
COMMON
43
TP1
2
L1061 5.6n
TX_PA_OUT_B2_B25
22pC1071
L1048
100n
C1050 1.2p
LDJ18829M24AD011
1
IN
2
GND1
3
OUT
5.6n
L1062
1.2p
C1088
FL1014
Termination_Port
L1036
6.8n
ECA30240001
Coupling
GND2
C1051 100p
100pC1055
R1011
6
5
49.9
4
13.04.25 changed
L1060
DNI
TRX_ANT2
CPL_CPL
PRX_MB1_IN_N
PRX_MB1_IN_P
TRX_ANT2
LGE Internal Use Only
33pC1079
TX_GSM_HB
L1054
DNI
11
10
9
8
7
6
12
ANT
GND3
TX1LB
TX2HB
LMSP32QP-F03
GND2
TRX8
5
134
14
TRX6
TRX5TRX1
GND4
FL1018
FL1018
EAT61793601
TRX10
GND1 TRX7
TRX9
2 15
3
- 78 -
16
1
TRX4
TRX2
17
22
GND5
SDATA
SCLK
GND6
TRX3
+2V95_VREG_L16
+1V8_VREG_S3A_RF
TX_B41
TRX_B7
RX_B41
100p C1080
VDD
18
VIO
19
20
21
RFFE2_DATA
RFFE2_CLK
23
TRX_B4
TRX_B1
TRX_B3
TRX_B2_B25
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
C1081100p
Check TP1
3. TROUBLE SHOOTING
Check TP1
Signal Exist?
Yes
Check TP2
Signal Exist?
Yes
Check TP3
Signal Exist?
Yes
Check the U2004
(WTR1605L-1)
No
No
No
Check the RX Level
Check the FL1018
Check the FL1008
(B2 Duplexer)
LGE Internal Use Only
- 79 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.4.3 WCDMA B4
3. TROUBLE SHOOTING
TP4
TP3
TP2
TRX_ANT2
33pC1079
TX_GSM_HB
L1054
DNI
11
10
9
8
7
6
12
ANT
GND3
TX1LB
TX2HB
LMSP32QP-F03
GND2
TRX8
5
BOT
134
14
TRX6
TRX5TRX1
GND4
FL1018
FL1018
EAT61793601
TRX10
GND1 TRX7
TRX9
2 15
3
16
1
TRX4
TRX2
TP1
17
GND5
SDATA
GND6
TRX3
22
VDD
VIO
SCLK
TX_B41
RX_B41
18
19
20
21
23
+2V95_VREG_L16
TRX_B7
RFFE2_DATA
RFFE2_CLK
FL1018
+1V8_VREG_S3A_RF
C1081100p
100p C1080
LGE Internal Use Only
- 80 -
TRX_B4
TRX_B1
TRX_B3
TRX_B2_B25
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
W_FL2-R-SMT-1_80
TRX_B1
TP2
TRX_B4
EAG63412001
ANTG3
G2
SW1002
G1
C1052 1.8n
C1065 1n
TRX_ANT2
CPL_CPL
C1114 100p
DNI
L1073
DNI
L1074
20549-001E
ANT
1
SW1003
G3 G4
43
EAG63293301
COMMON
TP1
2
L1048
100n
22pC1071
LDJ18829M24AD011
1
IN
2
GND1
3
OUT
FL1014
Termination_Port
ECA30240001
Coupling
GND2
R1011
6
5
49.9
4
13.04.25 changed
TX_PA_OUT_B1
C1122 3.3n
+2V95_VREG_L16
B1
6
2
4
L1038 3.3n
EAM62930901B8575
ANT
TX_IN
FL1007
RX_OUT1
RX_OUT2
GND1
GND2
GND4
GND3 GND5
3
1
8
7
95
B4
ACMD-4104-TR1
DNIL1045
2
EAM62791401
ANT
FL1012
RX1
GND1
GND2 GND5
GND3 GND4
RX2
36
TX
1
8
94
75
22n L1084
TX_PA_OUT_B4
L1081
8.2n
C1125 10p
10pC1124
3.3nC1123
XM0831SZ
1
PORT3+
2
GND1
3
GND2
4
PORT2-
5 6
TP3
EAM62493001
PORT3-
FL1020
PORT1-
PORT1+
Path
PRX_B4(P2)
PRX_B1(P3)
VDD
CTLPORT2+
10
9
8
7
C1121
100p
VDD VCTL
L
H
H
H
C1063
100p
TP4
PRX_B1_B4_SEL
C1056 33p
L1039
6.8n
C1061 33p
PRX_MB3_IN_P
PRX_MB3_IN_N
LGE Internal Use Only
- 81 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check TP1
3. TROUBLE SHOOTING
Check TP1
Signal Exist?
Check TP2
Signal Exist?
Check TP3
Signal Exist?
Check TP4
Signal Exist?
Yes
Yes
Yes
Yes
No
No
No
No
Check the RX Level
Check the FL1018
Check the FL1012
(B4 Duplexer)
Check the FL1020
(B1/4 Separator)
LGE Internal Use Only
Check the U2004
(WTR1605L-1)
- 82 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.4.4 WCDMA B5/ LTE B5/ GSM850
TP1
3. TROUBLE SHOOTING
TP3
U1000
BOT
TP2
LGE Internal Use Only
- 83 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
+2V95_VREG_L16
EAG63412001
G2
SW1000
G1
W_FL2-R-SMT-1_80
TRX_ANT1
SW1001
20549-001E
43
2
EAG63293301
ANTG3
33pC1113
DNIL1071
L1072 DNI
ANT COMMON
1
G3 G4
L1002
100n
C1001
1n
TP1
LDJ18829M24AD011
1
IN
2
GND1
3
OUT
FL1000
Termination_Port
ECA30240001
Coupling
GND2
6
5
4
TRX_ANT1
CPL_PDET_IN
CPL_CPL
+1V8_VREG_S3A_RF
100pC1025
10pC1023
TX_GSM_LB
GND
21
207
191817
TXLB
C1016 33p
L1013
DNI
GND4
1
ANT
2
NC1
3
TRX6
4
TRX5
5
TRX4
6
GND1
TXHB
U1000
U1000
RF1492A
EAT61914101
VDD GND3
SDATA
VIO
8
9
10
GND2
TRX1
TRX2
TRX3
SCLK
NC4
NC3
NC2
16
15
14
13
12
11
TRX_B17
TRX_B8
TRX_B5_B26
LGE Internal Use Only
- 84 -
R1015 0
R1016
0
RFFE2_CLK
RFFE2_DATA
4/4_QCT_R-013551
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TRX_B5_B26
TP2
B5/B6/B19/B26/BC0/BC10/G850
6
8107
TX
GND5
100pC1008
L1007
DNI
GND6
GND12
GND13
GND14
17
GND4
GND3
GND2
GND1
5
4
RX
1
GND7
9
GND8
ANT
11
12
13
GND9
GND10
FL1001
GND11
14315216
TP3
C1104
33p
C1004 3p
L1085
33p
C1101
3. TROUBLE SHOOTING
TX_PA_OUT_B5_B26_BC0_BC10_APT
TX_PA_OUT_B5_B26_BC0_BC10_ET
L1088 3.9n
C1005
100p
L1086
12n
C1009
3p
12n
L1004
18n
L1089 3.9n
C1010
100p
PRX_LB3_IN_P
PRX_LB3_IN_N
Check TP1
Check TP1
Signal Exist?
Yes
Check TP2
Signal Exist?
Yes
Check TP3
Signal Exist?
Yes
Check the U2004
(WTR1605L-1)
No
No
No
Check the RX Level
Check the U1000
Check the FL1001
(B5 Duplexer)
LGE Internal Use Only
- 85 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.4.5 WCDMA B8/ GSM900
TP1
3. TROUBLE SHOOTING
TP3
U1000
BOT
TP2
LGE Internal Use Only
- 86 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
+2V95_VREG_L16
EAG63412001
ANTG3
G2
SW1000
G1
W_FL2-R-SMT-1_80
DNIL1071
SW1001
20549-001E
43
2
EAG63293301
33pC1113
L1072 DNI
ANT COMMON
1
G3 G4
L1002
100n
C1001
1n
TP1
LDJ18829M24AD011
1
IN
2
GND1
3
OUT
FL1000
Termination_Port
ECA30240001
Coupling
GND2
6
5
4
TRX_ANT1
CPL_PDET_IN
CPL_CPL
+1V8_VREG_S3A_RF
100pC1025
10pC1023
TX_GSM_LB
GND
TRX_ANT1
C1016 33p
L1013
DNI
21
207
GND4
1
ANT
2
NC1
TRX6
TRX5
TRX4
GND1
U1000
U1000
RF1492A
EAT61914101
VDD GND3
3
4
5
6
191817
TXLB
TXHB
SDATA
VIO
8
9
10
GND2
TRX1
TRX2
TRX3
SCLK
NC4
NC3
NC2
16
15
14
13
12
11
R1015 0
R1016
4/4_QCT_R-013551
TRX_B17
TRX_B8
TRX_B5_B26
RFFE2_CLK
0
RFFE2_DATA
LGE Internal Use Only
- 87 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
TRX_B8
C1026 33p
TP2
B8/G900
SAYFH897MHE0F0A
6.2n
2
4 9
L1017
Check TP1
EAM62514001
ANT RX1
RX2
FL1003
GND1
GND3 GND4
TX
GND5GND2
C1019 18n
TP3
16
8
3
L1011
DNI
18nC1027
TX_PA_OUT_B8
PRX_LB2_IN_P
PRX_LB2_IN_N
75
Check TP1
Signal Exist?
Yes
Check TP2
Signal Exist?
Yes
Check TP3
Signal Exist?
Yes
Check the U2004
(WTR1605L-1)
No
No
No
Check the RX Level
Check the U1000
Check the FL1003
(B8 Duplexer)
LGE Internal Use Only
- 88 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.4.6 LTE B7
3. TROUBLE SHOOTING
TP3
TP4
TP2
TP5
BOT
FL1018
TP1
LGE Internal Use Only
- 89 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
EAG63412001
G2
G1
W_FL2-R-SMT-1_80
TRX_ANT2
SW1002
ANTG3
C1114 100p
DNI
L1073
33pC1079
TX_GSM_HB
L1054
DNI
DNI
L1074
20549-001E
ANT
1
SW1003
G3 G4
43
EAG63293301
COMMON
ANT
11
GND3
10
TX1LB
9
TX2HB
8
GND2
7
TRX8
6
2
L1048
100n
12
14
134
TRX6
GND4
FL1008
FL1018
EAT61793601
LMSP32QP-F03
TRX10
GND1 TRX7
TRX9
5
2 15
3
16
TRX5TRX1
1
22pC1071
TP1
17
TRX4
GND5
TRX2
TRX3
22
LDJ18829M24AD011
TX_B41
RX_B41
VDD
VIO
SDATA
SCLK
GND6
18
19
20
21
23
1
2
3
IN
FL1014
GND1
Termination_Port
OUT
+2V95_VREG_L16
TRX_B7
ECA30240001
6
Coupling
5
GND2
4
RFFE2_DATA
RFFE2_CLK
TRX_ANT2
R1011
49.9
CPL_CPL
13.04.25 changed
+1V8_VREG_S3A_RF
C1081100p
100p C1080
LGE Internal Use Only
- 90 -
TRX_B4
TRX_B1
TRX_B3
TRX_B2_B25
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
TRX_B7
TP2
2.2pC1069
33pC1070
RX_B7
L1047
B7
ACMD-6107
10pC1073
6 1
6.8n
2
GND1
L1050
4 7
GND3 GND6
EAM62571601
RXANT
FL1015
TX
OPT
GND4GND2
TP3
3
8
95
DNI
5.6p
C1074
DNIL1051
L1052 DNI
RX_B7
RX_B41
C1105
DNI
3/27 Add
XMSS1R6G0PA-001TMP
3
B41 Saw add
DNI_EAM62810001
ACPF-7041
U1007
2 1
TX/RXANT
L1070
DNI
GND
3
10p
C1090
B7_B41_SEL
5
4
EAM62730001
VCTL
PORT2
GND
ANT
FL1017
6
VDD
PORT1
1
2
+2V95_VREG_L16
HHM1918A2
UNBAL BALAN1
BALAN2
3
EAM62790201
FL1016
GND
TP5
12
4
C1089
10p
L1065
8.2n
L1063
L1064
33p
33p
L1066
DNI
PRX_HB_IN_N
PRX_HB_IN_P
B41 Balun add
TP4
VDD
100p C1078
Path
RX_B41(P1)
VCTL
H
H
HRX_B7(P2)
L
LGE Internal Use Only
- 91 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Check TP1
3. TROUBLE SHOOTING
Check TP1
Signal Exist?
Check TP2
Signal Exist?
Check TP3
Signal Exist?
Check TP4
Signal Exist?
Yes
Yes
Yes
Yes
No
No
No
No
Check the RX Level
Check the FL1018
Check the FL1015
(B7 Duplexer)
Check the FL1017
(B7 Separator)
LGE Internal Use Only
Check TP5
Signal Exist?
Yes
Check the U2004
(WTR1605L-1)
No
- 92 -
Check the FL1016
(B7 Balun)
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.4.7 LTE B20
3. TROUBLE SHOOTING
TP3
TP1
TP2
BOT
LGE Internal Use Only
- 93 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
+2V95_VREG_L16
EAG63412001
G2
SW1000
G1
W_FL2-R-SMT-1_80
TRX_ANT1
SW1001
20549-001E
43
2
EAG63293301
ANTG3
33pC1113
DNIL1071
ANT COMMON
1
G3 G4
L1002
100n
C1001
1n
LDJ18829M24AD011
1
IN
2
GND1
3
OUT
FL1000
Termination_Port
ECA30240001
Coupling
GND2
6
5
4
TRX_ANT1
CPL_PDET_IN
CPL_CPL
TP1
L1072 DNI
+1V8_VREG_S3A_RF
10pC1023
TRX_B17
TRX_B8
TRX_B5_B26
C1016 33p
L1013
DNI
GND
21
207
GND4
1
ANT
2
NC1
TRX6
TRX5
TRX4
GND1
U1000
U1000
RF1492A
EAT61914101
VDD GND3
3
4
5
6
191817
TXLB
TXHB
SDATA
VIO
8
9
10
TX_GSM_LB
GND2
NC4
NC3
NC2
TRX1
TRX2
TRX3
SCLK
100pC1025
16
15
14
13
12
11
LGE Internal Use Only
- 94 -
R1015 0
R1016
0
RFFE2_CLK
RFFE2_DATA
4/4_QCT_R-013551
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
TRX_B17
TP2
10pC1043
Check TP1
L1029
7.5n
B8091 EAM62672701
ANT
FL1005
2
GND1
4 9
GND3 GND4
RX1
RX2
TX
GND5GND2
12nC1039
22n
TP3
L1025
16
8
3
75
C1044 12n
0.6nC1045
L1030
DNI
PRX_LB1_IN_P
PRX_LB1_IN_N
L1031
DNI
Check TP1
Signal Exist?
Yes
Check TP2
Signal Exist?
Yes
Check TP3
Signal Exist?
Yes
Check the U2004
(WTR1605L-1)
No
No
No
Check the RX Level
Check the U1000
Check the FL1005
(B20 Duplexer)
LGE Internal Use Only
- 95 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.4.8 LTE B3/ DCS1800
3. TROUBLE SHOOTING
BOT
TP3
TP1
TP2
FL1018
LGE Internal Use Only
- 96 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
EAG63412001
G2
G1
W_FL2-R-SMT-1_80
TRX_ANT2
SW1002
LDJ18829M24AD011
1
IN
2
GND1
3
OUT
SW1003
G3 G4
43
EAG63293301
COMMON
2
L1048
100n
22pC1071
TP1
DNI
L1074
20549-001E
ANT
1
ANTG3
C1114 100p
DNI
L1073
ECA30240001
6
Coupling
FL1014
Termination_Port
GND2
5
4
+2V95_VREG_L16
R1011
49.9
13.04.25 changed
+1V8_VREG_S3A_RF
TRX_ANT2
CPL_CPL
TX_B41
33pC1079
TRX_B7
RX_B41
L1054
DNI
12
14
17
16
134
C1081100p
100p C1080
TX_GSM_HB
11
10
9
8
7
6
ANT
GND3
TX1LB
TX2HB
LMSP32QP-F03
GND2
TRX8
5
TRX6
GND4
FL1018
EAT61793601
FL1018
TRX10
GND1 TRX7
TRX9
2 15
3
TRX5TRX1
1
TRX4
TRX2
22
GND5
SDATA
SCLK
GND6
TRX3
VDD
VIO
18
19
20
21
23
RFFE2_DATA
RFFE2_CLK
TRX_B4
TRX_B1
TRX_B3
TRX_B2_B25
LGE Internal Use Only
- 97 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
TRX_B3
TP2
C1067
B3/G1800
1n
L1046 DNI
Check TP1
ANT RX
GND1 GND6
GND2 GND5
GND3 GND4
FL1013
ACMD-6103-TR1
EAM62632601
TP3
TX
1pC1059
L1041
5.6n
15n
C1064
16
3
92
84
75
5.6nL1044
1p
TX_PA_OUT_B3
L1042
100pC1060
C1068 100p
PRX_MB2_IN_N
L1043 15n
PRX_MB2_IN_P
Check TP1
Signal Exist?
Yes
Check TP2
Signal Exist?
Yes
Check TP3
Signal Exist?
Yes
Check the U2004
(WTR1605L-1)
No
No
No
Check the RX Level
Check the FL1018
Check the FL1013
(B3, DCS1800 RX Filter)
LGE Internal Use Only
- 98 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.5.5 Checking DRx Front-end Separator
FL2003
Separator
3. TROUBLE SHOOTING
TP1
TP2
TP3
FL1018
Separator
BOT
LGE Internal Use Only
- 99 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TROUBLE SHOOTING
+1V8_VREG_S3A_RF
+2V95_VREG_L16
10
TP2
TP1
DRX_B5_B26
DRX_B8
DRX_B1_B4
DRX_B2_B25
100p C2016
100p C2015
DRX_B3
6
512
4
3132141
RF10
RF1
15
NC
PGND
SCLK
SDATA
GND4
16
RF9
RF6
7
GND1
8
GND2
9
ANT
GND3
RF5
RF8
FL2003
RF1660
EAM62690801
RF2
RF3
RF4 RF7
11
VIO
VDD
21
20
19
18
17
TP3
RFFE2_CLK
RFFE2_DATA
LGE Internal Use Only
- 100 -
DRX_B17
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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