Page 1
Internal Use Only
Service Manual
LG-E445
Date : April, 2013 / Issue 0.9
Page 2
Table Of Contents
1. INTRODUCTION ..................................................................... 3
1.1 Purpose ........................................................................................................3
1.2 Regulatory Information .........................................................................3
1.3 Specications .............................................................................................5
2. PERFORMANCE ...................................................................... 8
2.1 Product Name ............................................................................................8
2.2 Supporting Standard ..............................................................................8
2.3 Main Parts : GSM Solution .....................................................................8
2.4 HW Features ...............................................................................................9
2.5. HW SPEC .................................................................................................. 11
2.6 E445 Figures ............................................................................................ 24
3.
CIC AND SERVICE CENTER
3.1 CIC FAQ ...................................................................................................... 25
4. TROUBLE SHOOTING ..........................................................26
4.1 WCDMA Rx Part Troubleshooting ...................................................26
4.2 WCDMA Tx Part Trouble ...................................................................... 50
4.3 GSM Rx Part Troubleshooting ..........................................................78
4.4 GSM Tx Part Troubleshooting .........................................................100
4.5. Power ......................................................................................................116
4.6 Charging .................................................................................................121
4.7. USB TS .....................................................................................................123
4.8. Audio TS .................................................................................................124
4.9 6 AXIS Sensor on/o TS .....................................................................134
4.10 Proximity Sensor on/o TS ............................................................137
4.11 Touch Sensor Trouble Shooting ..................................................139
4.12 Vibrator Trouble Shooting .............................................................141
4.13 3M Main Camera TS .........................................................................143
4.14 Main LCD TS ........................................................................................145
4.15 BT/Wi TS .............................................................................................148
4.16 GPS TS ....................................................................................................151
4.17 FM TS ......................................................................................................154
..........................................................25
5. DOWNLOAD .......................................................................156
6. BLOCK DIAGRAM ..............................................................176
7. CIRCUIT DIAGRAM ............................................................185
8. BGA PIN MAP .....................................................................192
9. PCB LAYOUT .......................................................................198
10. CALIBRATION ...................................................................201
11. HIDDEN MENU .................................................................221
12. DISASSEMBLE GUIDE ......................................................245
13. EXPLODED VIEW & REPLACEMENT PART LIST .............251
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Page 3
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.
1. INTRODUCTION
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.
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.
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Page 4
1. INTRODUCTION
1. Introduction
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.
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Page 5
1. Introduction
1.3 Specification
1.3 Specication
KEY FEATURES
• Android 4.1-(Jelly Bean)
• 3.8” Touch Screen HVGA (480 x 320)
• 3MP FF with flash
• 3G Mobile Hotspot
ENHANCED USER EXPERIENCE
• Android 4.1
• Proximity Sensor – locks the touch screen and buttons while talking on the phone
• Motion Sensor – Electronic compass , Accelerometer and Gyroscope
1. INTRODUCTION
• USB Charging via Computer
• Airplane Mode (RF Off)
DESIGN
• Sleek and Stylish Design
• 3.8“ HVGA LCD Screen
• Capacitive Touch Screen – Glass with fast and accurate response
• Micro USB/Charging Port
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Page 6
1. Introduction
CAMERA/VIDEO
1. Introduction
• 3MP FF with flash
• Camera Resolutions: 2048 x 1536, 1280 x 960 Pixels
• Image Editor: zoom, rotate, crop images
• Brightness, ISO, White Balance,* Color Effects, Timer
• Cheese shutter – take photo with voice command.
• Video Resolutions: 640 x 480 320 x 240 176 x 144 Pixels
CAMERA/VIDEO
MULTIMEDIA
• Music Player for MP3, WMA, and Unprotected AAC
• Stereo Sound via Headset or Bluetooth
• Music Library – Organized by Artists, Albums, Songs, and Playlists
• Repeat and Shuffle Music Playback Modes
• 3MP FF with flash
• Camera Resolutions: 2048 x 1536, 1280 x 960 Pixels
• Image Editor: zoom, rotate, crop images
• Brightness, ISO, White Balance,* Color Effects, Timer
• Cheese shutter – take photo with voice command.
• Video Resolutions: 640 x 480 320 x 240 176 x 144 Pixels
1. INTRODUCTION
MULTIMEDIA
• Music Player for MP3, WMA, and Unprotected AAC
• Stereo Sound via Headset or Bluetooth
• Music Library – Organized by Artists, Albums, Songs, and Playlists
• Repeat and Shuffle Music Playback Modes
BLUETOOTH®
• Version: 3.0
• Supported Profiles: headset, hands-free, object push, advanced audio distribution (stereo), audio/video
remote control, file transfer, phone book access, message access, serial port
• Listen to Music with Optional Stereo Bluetooth Headset**
• Send User-Generated Pictures (JPEG) and Videos via Bluetooth Wireless Technology
*Depends on available memory.
**Accessories sold separately.
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Page 7
VOICE/AUDIO
1. Introduction
• One-Touch Speakerphone*
1. INTRODUCTION
• Speaker-Independent Voice Commands
• Voice-Activated Dialing
• Text to Speech
• MP3 Music Ringer Support
TOOLS & DATA
• Android Apps: Alarm/Clock, Browser, Calculator, Calendar (Corporate or Google), Camera, Contacts,
Email, Gallery, Gmail, Google+, Maps, Messaging, Messenger, Music Player, Phone, Places, Play Books,
Play Movies, Play Music, Play Store, Talk, Video Player, Voice Recorder, Youtube
• Navigation – spoken turn-by-turn directions showing real-time traffic
• Wi-Fi Connectivity – IEEE 802.11 b/g/n
• A-GPS Support for Enhanced Location Accuracy
SPECIFICATIONS
• Technology: GSM/WCMDA
• Frequencies: GSM 850,900,1800,1900
• WCDMA 2100, 900
• Data Transmission: WCMDA, GPRS
• Dimensions: 112.5 X 64.7 X 11.9(mm)
• Display: 3.8" , HVGA (480 x 320) pixels
• Standard Battery: 1,700 [mAh]
ACCESSORIES
• Standard Battery
• Travel Adapter and USB Cable*
• Stereo Headset
LGE Internal Use Only
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Page 8
2. PERFORMANCE
LG-E440 Product SPEC
2.1 Product Name
LG-E440 : WCDMA 900//2100+GSM850/EGSM/DCS/PCS
(HSUPA 5.8Mbps(cat6)/HSDPA 21Mbps(cat14)/GPRS Class33/EDGE Class33)
2.2 Supporting Standard
2.1 Product Name
LG-E445 : WCDMA 900//2100+GSM850/EGSM/DCS/PCS
2.2 Supporting Standard
(HSUPA 5.8Mbps(cat6)/HSDPA 21Mbps(cat14)/GPRS Class33/EDGE Class33)
2. PERFORMANCE
Supporting Standard
Frequency Range
WCDMA(FDD1,8)/EGSM/GSM850/DCS1800/PCS1900
with seamless handover
Phase 2+(include AMR)
SIM Toolkit : Class 1, 2, 3, C-E
WCDMA(FDD1) TX : 1920 – 1980 MHz
WCDMA(FDD1) RX : 2110 – 2170 MHz
WCDMA(FDD8) TX : 880 – 915 MHz
WCDMA(FDD8) RX : 925 – 960 MHz
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
2.3 Main Parts : GSM Solution
2.3 Main Parts : GSM Solution
Item Part Name Comment
AP Chip MT6575 (MTK)
CP Chip MT6162 (MTK)
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2. PERFORMANCE
LG-E440 Product SPEC
2.4 HW Features
2.4 HW Features
List Type / Spec.
1. Phone Type DOP Type
2. Size 112.5 x 64.7 x 11.9 (mm)
3. Weight 110g
4. Battery 1,700mAh ( typ.), 1,650mAh(min) (Li-Ion)
5.Chipset MT6575,
6. Memory 4GB(EMMC) +4Gb(LPDDR2)
Size 3.8 inch
Dot 320(H) X 480(V)
Color 16.7M colors
7. LCD
8. Main Camera (3M)
Display Type Active matrix TFT, Transmissive Type
NTSC Typ. 70%
Contrast Ratio Typ. 1000:1
Pixel Pitch 0. 055mm X 0.167mm (151.8ppi)
Color temperature 5000 ~ 9000(K) ( typ. 6500K)
Type CMOS image sensor
Resolution 2048(H) X 1536(V) pixels.
Frame Rate 15 fps@ QXGA, 30 fps@ XGA
View Angle 65°
Image Scaling Down 3M, 2M,1M,VGA
Pixel x size 1.4um x1.4um
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Page 10
LG-E440 Product SPEC
1) MIDI MIDI
2. PERFORMANCE
10. Audio
11. Bluetooth
12. WLAN
depend on environment 0 ~ 50m (depend on environment)
13. GPS type A-GPS, GNSS
2) Mono 18 X 10 X 3T Speaker, Receiver Dual mode
3) Receiver 18 X 10 X 3T Speaker, Receiver Dual mode
Effective Distance 10M
Distance 0 m ~ 10 m (depend on environment)
standard IEEE 802.11 b/g/n
Throughput Max 40Mbps (SDIO Driver performance)
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2.5. HW SPEC
LG-E440 Product SPEC
2.5. HW SPEC.
1) WCDMA transmitter specification
1) WCDMA transmitter specication
Item Spec. Min Typ. Max Unit
2. PERFORMANCE
Maximum Output
Power
Frequency Accuracy - -200 - +200 Hz
Minimum Output
Power
Occupied
Bandwidth
Adjacent Channel
Leakage Power
Ratio
Error Vector
Magnitude(EVM)
Peak Code Domain
Error
Power class Ⅲ
Δf = ± 10MHz
21.0 23.0 25.0
- - - -50 dBm/3.84MHz
- - - 4.6 MHz
Δf = ± 5MHz
- - - 17
- - - 15
- - -33 dBm/3.84MHz
- - -43 dBm/3.84MHz
dBm/3.84MHz
dBm/3.84MHz
%
Open Loop
Output Power
Transmit Off Power
Spectrum Emission
Mask
LGE Internal Use Only
Ior =-106.7dBm/3.84MHz -46.7 - -28.7
Ior =-65.7dBm/3.84MHz -23.0 - -5.0
Ior =-25.0dBm/3.84MHz -0.0 - 14.0
- - - -56 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
- 11 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
dBm/3.84MHz
dBm/3.84MHz
dBm/3.84MHz
Only for training and service purposes
Page 12
2. PERFORMANCE
LG-E440 Product SPEC
Transmit Spurious
Emission
9kHz ~ 150kHz
150kHz ~ 30MHz
30MHz ~ 1GHz
1GHz ~ 12.5GHz
-36
-36
-36
-30
dBm
dBm
dBm
dBm
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Page 13
2. PERFORMANCE
LG-E440 Product SPEC
Transmit Spurious
Emission
9kHz ~ 150kHz
-36
dBm
150kHz ~ 30MHz
-36
dBm
30MHz ~ 1GHz
-36
dBm
1GHz ~ 12.5GHz
-30
dBm
2) WCDMA receiver specification
2) WCDMA receiver specication
Item Specification
<REFÎ
>
or
(ACS)
Receive Frequency
Reference Sensitivity Level
Maximum Input Level BER < 0.001 when Îor = -25 dBm / 3.84 MHz
Adjacent Channel Selectivity
Blocking Characteristic
Spurious Response
BD1: 2110 ~ 2170 MHz
BD8: 925 MHz ~ 960 MHz
Band1 : BER < 0.001 when Îor = -106.7 dBm / 3.84 MHz
Band8 : BER < 0.001 when Îor = -103.7 dBm / 3.84 MHz
ACS > 33 dB where BER < 0.001 when
Îor = <REFÎ
& Ioac = –52 dBm / 3.84 MHz @ ±5 MHz
BER < 0.001 when Îor = <REFÎ
& Iblocking = -56 dBm / 3.84 MHz @ Fuw(offset) = ±10 MHz
or Iblocking = -44 dBm / 3.84 MHz @ Fuw(offset) = ±15 MHz
BER < 0.001 when Îor = <REFÎ
BER < 0.001 when Îor= <REFÎ
> + 14 dB / 3.84 MHz
or
& Iblocking = -44 dBm
> + 3 dB / 3.84 MHz
or
> + 3 dB / 3.84 MHz
or
> + 3 dB / 3.84 MHz
or
Intermodulation
Spurious Emissions
Inner Loop Power Control
In Uplink
& Iouw1 = -46 dBm @ Fuw1(offset) = ±10 MHz
& Iouw2 = -46 dBm / 3.84 MHz @ Fuw2(offset) = ±20 MHz
< -57 dBm / 100 kHz BW @ 9 kHz ≤ f < 1 GHz
< -47 dBm / 1 MHz BW @ 1 GHz ≤ f ≤ 12.75 GHz
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
LGE Internal Use Only
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Page 14
LG-E440 Product SPEC
3) HSDPA transmitter specification
t Level for
3) HSDPA transmitter specication
2. PERFORMANCE
Item Spec. Min Typ. Max Unit
5.2.A Maximum
Output Power
with HS-DPCCH
5.7A HS-DPCCH
Trandsmitter
1/15 ≤ βc/βd ≤ 12/15
13/15 ≤ βc/βd ≤ 15/8
15/7 ≤ βc/βd ≤ 15/0
Step 0
Step 1 –
Step 0
MAX
/
0dBm
Δf = 2.5~3.5MHz -35-15 * (Δf-2.5) dBc/30KHz
Step 2 –
Step 3
Step 5 –
Step 4
Step 6 –
Step 7
21.0
20
19
23.0
23.0
22.5
0 dBm +/- 1 dB dB
6 dB +/- 2.3 dB dB
1 dB +/- 0.6 dB dB
0 dB +/- 0.6 dB dB
5 dB +/- 2.3 dB dB
25.0
25
25
dBm/3.84MHz
Receiver
5.9A Spectrum
Emission Mask
with HS-DPCCH
5.10A Adjacent
Channel Leakage
Power Ratio with
HS-DPCCH
5.13.1A Error
Vector
Magnitude (EVM)
with HS-DPCCH
6.3A Maximum
Inpu
HS-PDSCH
Reception
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
Δf = ± 5MHz
Δf = ± 10MHz
MAX Power
-20 dBm
Pin = -25dBm - - 10 BLER(%)
- - -33 dBm/3.84MHz
- - -43 dBm/3.84MHz
- - 17.5
%
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Page 15
LG-E440 Product SPEC
4) GSM receiver specification
4) GSM receiver specication
2. PERFORMANCE
Item
Phase Error
Frequency Error
EMC(Radiated Spurious Emission
Disturbance)
Transmitter Output power and Burst Timing
Burst Timing
Spectrum due to modulation out to less
than 1800kHz offset
Spectrum due to modulation out to larger
than 1800kHz offset to the edge of the
transmit band
Spec.
Rms : 5°
Peak : 20 °
GSM : 0.1 ppm
DCS/PCS : 0.1 ppm
3000kHz-6000kHz : <-65dBc(-46dBm)
GSM/DCS : < -28dBm
GSM : 5dBm – 33dBm ± 3dB
DCS/PCS : 0dBm – 30dBm ± 3dB
<3.69us
200kHz : -36dBm
600kHz : -51dBm/-56dBm
GSM :
1800-3000kHz :< -63dBc(-46dBm)
6000kHz < : < -71dBc(-46dBm)
DCS :
1800-3000kHz :< -65dBc(-51dBm)
6000kHz < : < -73dBc(-51dBm)
Spectrum due to switching transient
Reference Sensitivity – TCH/FS
Usable receiver input level range
Intermodulation rejection – Speech
channels
AM Suppression
- GSM : -31dBm - DCS : -29dBm
Timing Advance
LGE Internal Use Only
400kHz : -19dBm/-22dBm(5/0), -23dBm
600kHz : -21dBm/-24dBm(5/0), -26dBm
Class II(RBER) : -105dBm(2.439%)
0.012(-15 - -40dBm)
± 800kHz, ± 1600kHz
- 15 -
: -98dBm/-96dBm (2.439%)
-98dBm/-96dBm (2.439%)
± 0.5T
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Page 16
2. PERFORMANCE
LG-E440 Product SPEC
5) Bluetooth transmitter specification
5) Bluetooth transmitter specication
Item Spec. Min Typ. Max
Output Power
Power Density
Power Control
Frequency Range
Tx Output Spectrum
(20dB BW)
Tx Output Spectrum
(Adjacent Output
Power)
DH5
PRBS9
DH5
PRBS9
DH1
PRBS9
DH5
PRBS9
DH5
PRBS9
DH5
PRBS9
Power
(Class I)
@100kHz RBW
Step size
Power(min)
-30dBc
@100kHz RBW
Δf =f
H-fL
@M-N = 2
@M-N ≥ 3
Unit
0 - 20
- +20
dBm
dBm
2 - 8 dB
- 4 dBm
2400 - 2483.5 MHz
- 1 MHz
- -20
- -40
dBm
dBm
Modulation Index
Initial Carrier Freq.
Tolerance
Carrier Frequency Drift
DH5
11110000
DH5
10101010
DH5
PRBS9
DH1
10101010
DH3
10101010
DH5
10101010
f1
AVG
f2
MAX
f2
/f1
AVG
AVG
140 - 175
115 -
0.8 -
-75 - +75
Freq. Drift -25 - +25
Drift Rate -20 - +20
Freq. Drift -40 - +40
Drift Rate -20 - +20
Freq. Drift -40 - +40
Drift Rate -20 - +20
kHz
kHz
kHz
kHz
kHz/50us
kHz
kHz/50us
kHz
kHz/50us
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Page 17
LG-E440 Product SPEC
6) Bluetooth receiver specification
6) Bluetooth receiver specication
Item Spec. BER=0.1% Min Typ. Max Unit
2. PERFORMANCE
Sensitivity
(Single Slot Packet)
Sensitivity
(Multi Slot Packet)
C/I Performance*
Input power @BT_w
Input power @BT_w
Input power @BT_i
DH1
PRBS9
DH5
PRBS9
DH1
PRBS9
-
-
C/I@Co-Channel
-60dBm @ BT
C/I @1MHz
-60dBm@ BT
C/I @2MHz
-60dBm@ BT
C/I @≥3MHz
-67dBm@ BT
C/I @Image
-67dBm@ BT
C/I @ Image±1MHz
-67dBm@ BT
30M ~2 GHz
-67dBm@ BT
-40 -37
-10 -
- -70 dBm
- -70 dBm
- 11
- 0
- -30
dB
- -9
- -20
Blocking
Performance
Intermodulation
Performance
Maximum Input
Level
LGE Internal Use Only
DH1
PRBS9
Input power @CW
DH1
PRBS9
Input power @CW_i
DH1
PRBS9
Input power @BT_w
2 ~ 2.4 GHz
-67dBm@ BT
2.5 ~ 3 GHz
-67dBm@ BT
3 ~ 12.75 GHz
-67dBm@ BT
Δf = +5MHz (CW_i)
Δf = +10MHz (BT_i)
-64dBm@ BT_w
Δf = -5MHz (CW_i)
Δf = -10MHz (BT_i)
-64dBm@ BT_w
- -20 -
- 17 -
-27 -
-27 -
-10 -
-39 -
-39 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
dBm
dBm
dBm
dBm
Only for training and service purposes
Page 18
LG-E440 Product SPEC
7) WLAN 802.11b transceiver specification
7) WLAN 802.11b transceiver specication
Item Specification
2. PERFORMANCE
Transmit Frequency 2400 MHz ~ 2483.5 MHz ( CH1~CH13)
Tx Power Level
Frequency Tolerance within ±25 PPM
Chip clock Frequency
Tolerance
≤ -30 @ fc-22MHz< f <fc-11MHz and fc+11MHz< f <fc+22MHz
Spectrum Mask
Power ramp on/off time
Carrier Suppression
Modulation Accuracy
(Peak EVM)
≤ 20dBm under (Europe), ≤ 30dBm under (USA)
within ±25 PPM
≤ -50 @ f < fc-22MHz and f > fc+22MHz
≤ 2us
≤ -15dB
≤ 35%
Spurious Emissions
Rx Min input Sensitivity
Rx Max input Sensitivity
Rx Adjacent Channel
Rejection
LGE Internal Use Only
< -36 dBm @ 30MHz ~ 1GHz
< -30 dBm above @ 1GHz ~ 12.75GHz
< -47 dBm @ 1.8GHz ~ 1.9GHz
< -47 dBm @ 5.15GHz ~ 5.3GHz
≤ -76dBm(1Mbps,2Mbps,5.5Mbps,11Mbps) @ FER ≤ 8%
≥ -10dBm(1Mbps,2Mbps,5.5Mbps,11Mbps) @ FER ≤ 8%
≥ 35dB @FER ≤ 8%,
interference input signal -70dBm@fc±25MHz(11Mbps)
- 18 -
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Page 19
2. PERFORMANCE
LG-E440 Product SPEC
8) WLAN 802.11g transceiver specification
8) WLAN 802.11g transceiver specication
Item Specification
Transmit Frequency 2400 MHz ~ 2483.5 MHz ( CH1~CH13)
Tx Power Level
Frequency Tolerance within ±25 PPM
Chip clock Frequency
Tolerance
Spectrum Mask
Transmitter constellation error
(rms EVM)
≤ 20dBm under (Europe), ≤ 30dBm under (USA)
within ±25 PPM
≤ -20 @ ±11MHz offset (9Mhz ~ 11MHz)
≤ -28 @ ±20MHz offset (11MHz ~ 20Mhz)
≤ -40 @ ±30MHz offset (20MHz ~ 30Mhz)
≤ -5dB
Spurious Emissions
Rx Min input Sensitivity
Rx Max input Sensitivity
Rx Adjacent Channel
Rejection
< -36 dBm @ 30MHz ~ 1GHz
< -30 dBm above @ 1GHz ~ 12.75GHz
< -47 dBm @ 1.8GHz ~ 1.9GHz
< -47 dBm @ 5.15GHz ~ 5.3GHz
PER ≤ 10%
-82dBm@6Mbps, -81dBm@9Mbps, -79dBm@12Mbps
-77dBm@18Mbps, -74dBm@24Mbps, -70dBm@36Mbps
-66dBm@48Mbps, -65dBm@54Mbps
≥ -20dBm(6,9,12,18,24,36,48,54Mbps) @ PER ≤ 10%
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
LGE Internal Use Only
- 19 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 20
2. PERFORMANCE
LG-E440 Product SPEC
9) WLAN 802.11n transceiver specification
9) WLAN 802.11n transceiver specication
Item Specification
Transmit Frequency
Tx Power Level ≤ 20dBm under (Europe), ≤ 30dBm under (USA)
Frequency Tolerance within ±25 PPM
Chip clock Frequency
Tolerance
Spectrum Mask
Transmitter constellation error
(rms EVM)
2400 MHz ~ 2483.5 MHz ( CH1~CH13)
within ±25 PPM
≤ -20 @ ±11MHz offset (9Mhz ~ 11MHz)
≤ -28 @ ±20MHz offset (11MHz ~ 20Mhz)
≤ -45 @ ±30MHz offset (20MHz ~ 30Mhz)
≤ -5dB@6.5Mbps, ≤ -10dB@13Mbps, ≤ -13dB@19.5Mbps,
≤ -16dB@26Mbps, ≤ -19dB@39Mbps, ≤ -22dB@52Mbps,
≤ -25dB@58.5Mbps, ≤ -28dB@65Mbps
< -36 dBm @ 30MHz ~ 1GHz
Spurious Emissions
-82dBm@6.5Mbps, -79dBm@13Mbps, -77dBm@19.5Mbps
Rx Min input Sensitivity
-74dBm@26Mbps, -70dBm@39Mbps, -66dBm@52Mbps
Rx Max input Sensitivity ≥ -20dBm(6.5,13,19.5,26,39,52,58.5,65Mbps) @ PER ≤ 10%
Rx Adjacent Channel
Rejection
※ACR shall be measured by setting the desired signal's strength
< -30 dBm above @ 1GHz ~ 12.75GHz
< -47 dBm @ 1.8GHz ~ 1.9GHz
< -47 dBm @ 5.15GHz ~ 5.3GHz
PER ≤ 10%
-65dBm@58.5Mbps, -64dBm@65Mbps
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
LGE Internal Use Only
3 dB above the rate-dependent
sensitivity specified in min input sensitivity
- 20 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 21
10) GPS receiver specication
LG-E440 Product SPEC
10) GPS receiver specification
LG-E440 Product SPEC
10) GPS receiver specification
Item Spec.
Sensitivity Test
Success rate ≥ 60% @ -154 dBm
11) Current consumption
** Test condition for Standby current consumption should be as below.
: Measurement time 1hr, with Agilent & CMT JIG
Item Spec.
2. PERFORMANCE
Sensitivity Test
11) Current consumption
** Test condition for Standby current consumption should be as below.
: Measurement time 1hr, with Agilent & CMT JIG
2. Sleep : connector Ear jack
3. Current(Sleep & Idle AVG) Under 10mA @ DRX 7 Under 10mA @ P.P 5
4. BT Connected idle
Item
1. Sleep Mode
WCDMA
Under 5mA
Under 6mA
Under 15mA
Success rate ≥ 60% @ -154 dBm
Specification
GSM
Under 5mA
Under 6mA
Under 15mA
5. Talk Mode
6. Power Off Mode
7. Backup Battery
LGE Internal Use Only
- Max Pwr
Under 600mA @ Avg
- Tx 10dBm
Under 300 mA @ Avg
under 300uA
under 5uA
- 21 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
GSM LVL 5
under 300 mA @ Avg
Under 300 uA
under 5uA
Only for training and service purposes
Page 22
LG-E440 Product SPEC
12) RSSI indicator (Based on Cell power)
12) RSSI indicator (Based on Cell power)
2. PERFORMANCE
BAR
13) Current consumption
13) Current consumption
5
54
43
32
21
10
Standby
(WCDMA)
Over 350 Hours
Under 4.5mA
WCDMA
Over -85 ±2dBm
-85 ±2dBm
-89 ±2dBm
-95 ±2dBm
-99 ±2dBm
-105 ±3dBm
GSM/DCS/PCS
Over -92 ±2dBm
-92 ±2dBm
-96 ±2dBm
-100 ±2dBm
-104 ±2dBm
-106 ±3dBm
DRX 7 @ BATT Capacity : 1700mAh
14) Charging hour
14) Charging hour
Under 3 hour 30min (1700mAh battery, 700mA TA)
Under 3 hour 30min (1700mAh battery, 700mA TA)
LGE Internal Use Only
- 22 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 23
LG-E440 Product SPEC
15) Battery indicator
15) Battery indicator
Battery Bar Specification
BAR 20 (Full) 98% over
2. PERFORMANCE
BAR 20 --> 19
BAR 19 --> 18
BAR 18 --> 17
BAR 17 --> 16
BAR 16 --> 15
BAR 15 --> 14
BAR 14 --> 13
BAR 13 --> 12
BAR 12 --> 11
BAR 11 --> 10
BAR 10 --> 9
BAR 9 --> 8
BAR 8 --> 7
BAR 7 --> 6
BAR 6 --> 5
98% ◊ 97%
93% ◊ 92%
88% ◊ 87%
83% ◊ 82%
78% ◊ 77%
73% ◊ 72%
68% ◊ 67%
63% ◊ 62%
58% ◊ 57%
53% ◊ 52%
48% ◊ 47%
43% ◊ 42%
38% ◊ 37%
33% ◊ 32%
28% ◊ 27%
remain%
BAR 5 --> 4
BAR 4 --> 3
BAR 3 --> 2
BAR 2 --> 1
BAR 1 --> 0
Low Battery Pop-up 4% ~ 15% : One Time popup (No call)
Critical Low Battery Pop-up 0% ~ 3% : Every Level change popup (No call)
Power Off 1%
LGE Internal Use Only
23% ◊ 22%
16% ◊ 15%
13% ◊ 12%
8% ◊ 7%
3% ◊ 2%
- 23 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 24
2.6 E445 Figures
2. PERFORMANCE
LGE Internal Use Only
- 24 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 25
3. CIC AND SERVICE CENTER
3. CIC AND SERVICE CENTER
3.1 CIC FAQ
This document is draft version, so the contents will be updated after registering the nal one.
LGE Internal Use Only
- 25 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 26
4. TROUBLE SHOOTING
4.1 WCDMA Rx Part Troubleshooting
4.1.1 WCDMA_B1 Rx
START
Rx TEST SETUP
- DL Channel : 10700
- Sector Power : -30 dBm
4. TROUBLE SHOOTING
1. Check
DC Power Supply circuit
2. Check MT6162 XO
3.Check RF Signal path
Re download S/W & Cal
* There are no Test Points on the IQ Data Line. So It is impossible to check the IQ Data Wave form.
LGE Internal Use Only
- 26 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 27
4. TROUBLE SHOOTING
MT6162
(U101)
RF3237
(U102)
DPX
(FL103)
LGE Internal Use Only
- 27 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 28
4.1.1.1 Checking DC Power supply circuit
START
4. TROUBLE SHOOTING
Check TP1(C113)
+1V8_VRF_MTK is OK?
Yes
Check TP2(C105)
+2V85_VRF_MTK is OK?
Yes
Check TP3(C134)
+2V8_VTCXO_MTK is OK?
Yes
DC Power Supply Circuit is OK
See Next page to Check XO Circuit
No
No
No
The Problem may be Logic part
Refer to Logic troubleshoot
The Problem may be Logic part
Refer to Logic troubleshoot
The Problem may be Logic part
Refer to Logic troubleshoot
LGE Internal Use Only
- 28 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 29
4. TROUBLE SHOOTING
TP3: C134
(+2V8_VTCXO_MTK )
(+2V85_VRF_MTK )
+2V85_VRF_MTK
C1051u
BSI1_CLK
+1V8_VRF_MTK
C1131u
1u C112
TP2: C105
BSI1_DATA
+1V8_VIO_MTK
BSI1_CS1
C1141u
MT6162
(U101)
TP1 : C113
(+1V8_VRF_MTK )
BSI1_CS0
TP2
LGE Internal Use Only
L2
VSUP1
K1
VDD_18
H1
J2
VSUP2a
U101
G2
VDD_28b
TP1
1
B1
C2
D1
E2
F1
CLK
DATA0
EN
VINT
GND2
DATA1
REFCLK1
REFCLK2
REFCLK3
VDDXO
NC4
XO2
XO1/REFIN
VTUNE
CLK_MODE
VSUP2b
GND1
PGND
A2
B3
A4
B5
A6
B7
A8
B9
A10
B11
A12
C124 1n
- 29 -
SYSCLK
+2V8_VTCXO_MTK
C131
1uC135
TP3
1n
C134
MAIN_CLK_26MHz
0.1u
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 30
4.1.1.2 Checking MT6162 XO circuit
START
4. TROUBLE SHOOTING
Check TP1(C131)
Is it 26MHz?
Replace X101 and
then check TP1(C131)
Is it similar ?
NO
Replace Main B/D
NO
YES
YES
XO circuit is Ok . See next page
to check RF signal path.
XO circuit is Ok . See next page
to check RF signal path.
LGE Internal Use Only
- 30 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 31
4. TROUBLE SHOOTING
REFCLK1
REFCLK2
REFCLK3
VDDXO
NC4
XO2
XO1/REFIN
VTUNE
CLK_MODE
VSUP2b
GND1
PDET
TP1 : C131
(MAIN_CLK_26MHz)
A2
B3
A4
B5
A6
B7
A8
B9
A10
B11
A12
B13
C124 1n
1uC135
C131
TP1
MT6162
(U101)
SYSCLK
+2V8_VTCXO_MTK
1n
C134
PDET
0.1u
MAIN_CLK_26MHz
LGE Internal Use Only
- 31 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 32
4.1.1.3 Checking RF signal path (PAM)
START
4. TROUBLE SHOOTING
Check TP1(C110) at U102
Check if there is any major dierence referring
To Figure 4.1.1(b). Is any signal detected at that
point?
Yes
Check TP2(L109) at FL104
Check if there is any major dierence referring
To Figure 4.1.1(c). Is any signal detected at that
point?
Yes
Is any signal detected at
that point?
No
No
No
Check L102,C110, SW101
Check TP3(C179),TP4(C180), TP5(C181),
at U102. Is any DC signal detected
at that points?
Yes
Replace U102
Check L109
No
TX module is OK. See next page to check DPX
LGE Internal Use Only
Yes
The Problem may be Logic part
Refer to Logic troubleshoot
- 32 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 33
4. TROUBLE SHOOTING
TP3
TP4
TP5
U102
TX module
TP1
TP2
SW101
ANT
1
COMMON
G3 G4
43
LGE Internal Use Only
TP1
W850_W900_TRX
2
C110 1.5n
C118
DNI
L102
100n
24
23
22
GND9
GND10
GND11
GND12
25
GND13
26
GND14
27
GND15
28
GND16
29
GND17
30
GND18
31
1
GND1
2
U102
GND2
3
HB_RFIN
21
20
GND8
LB_RFIN
5
4
19
ANT
GND7
VRAMP
TX_EN
6
18
TRX6
MODE
7
GND
- 33 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TP2
W1900_2100_TRX
17
TRX5
GND6
16
TRX3
15
TRX2
14
GND5
13
GND4
12
GND3
11
VBATT
10
BS2
BS1
9
8
Page 34
4. TROUBLE SHOOTING
TP3
TP4
TP5
C179
100p
C180
100p
C181
100p
ANT_SEL1
ANT_SEL2
ANT_SEL0
GSM_PA_EN
C138
100p
LGE Internal Use Only
Figure 4.1.1 (b)
Figure 4.1.1 (c)
- 34 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 35
4.1.1.4 Checking RF signal path (FEM)
START
4. TROUBLE SHOOTING
Check TP1(L109) at FL103
Check if there is any major dierence referring
To Figure 4.1.1(b) Is any signal detected at
that point?
Yes
Is any signal detected at
that point?
Yes
All WCDMA_B1 Rx check is complete.
If the phone sill do not work ,replace main board
No
No
Check L110,L108, C147, C153
Replace FL103
LGE Internal Use Only
- 35 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 36
FL103 DPX
4. TROUBLE SHOOTING
TP1
B1 W2100 TRX(W1900)
C156
DNI
1.8n
L109
2.7n
L110
W1900_2100_TRX
TP1
LGE Internal Use Only
FL103
ANT
2
GND1
4 9
GND3 GND4
RX1
RX2
TX
GND5GND2
- 36 -
C147
5p
C148
L108
4.7n
C153
16
8
3
75
DNI
C150
DNI
5p
RX_W1900_W2100_INN
C149
DNI
RX_W1900_W2100_INP
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 37
Figure 4.1.1 (b)
4. TROUBLE SHOOTING
LGE Internal Use Only
Figure 4.1.1 (c)
- 37 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 38
4.1.2 WCDMA_B8 Rx
4. TROUBLE SHOOTING
START
Rx TEST SETUP
- Test Channel : 3013
- Sector Power : -30 dBm
1. Check
DC Power Supply circuit
2. Check MT6162 XO
3. Check RF Signal Path
Re download S/W, Cal
* there are no Test Points on the IQ Data Line. So It is impossible to check the IQ Data Wave form
LGE Internal Use Only
- 38 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 39
MT6162
(U101)
4. TROUBLE SHOOTING
RF3237
(U102)
DPX
(FL104)
LGE Internal Use Only
- 39 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 40
4.1.2.1 Checking DC Power supply circuit
START
4. TROUBLE SHOOTING
Check TP1(C113)
+1V8_VRF_MTK is OK?
Yes
Check TP2(C105)
+2V85_VRF_MTK is OK?
Yes
CheckTP3(C134)
+2V8_VTCXO_MTK is OK?
Yes
No
No
No
The Problem may be Logic part
Refer to Logic troubleshoot
The Problem may be Logic part
Refer to Logic troubleshoot
The Problem may be Logic part
Refer to Logic troubleshoot
DC Po wer su pply Circuit is OK. See next
LGE Internal Use Only
Page to check XO circuit
- 40 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 41
4. TROUBLE SHOOTING
TP3: C134
(+2V8_VTCXO_MTK )
(+2V85_VRF_MTK )
+2V85_VRF_MTK
C1051u
BSI1_CLK
+1V8_VRF_MTK
C1131u
1u C112
TP2: C105
BSI1_DATA
+1V8_VIO_MTK
BSI1_CS1
C1141u
MT6162
(U101)
TP1 : C113
(+1V8_VRF_MTK )
BSI1_CS0
TP2
LGE Internal Use Only
L2
VSUP1
K1
VDD_18
H1
J2
VSUP2a
U101
G2
VDD_28b
TP1
1
B1
C2
D1
E2
F1
CLK
DATA0
EN
VINT
GND2
DATA1
REFCLK1
REFCLK2
REFCLK3
VDDXO
NC4
XO2
XO1/REFIN
VTUNE
CLK_MODE
VSUP2b
GND1
PGND
A2
B3
A4
B5
A6
B7
A8
B9
A10
B11
A12
C124 1n
- 41 -
SYSCLK
+2V8_VTCXO_MTK
C131
1uC135
TP3
1n
C134
MAIN_CLK_26MHz
0.1u
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 42
4.1.2.2 Checking MT61672 XO circuit
START
4. TROUBLE SHOOTING
Check TP1(C131)
Is it 26MHz?
Replace X101 and
then check TP1(C131)
Is it similar ?
Replace Main B/D
No
No
Yes
Yes
XO circuit is Ok. See next page
to check RF signal path
XO circuit is Ok. See next page
to check RF signal path.
LGE Internal Use Only
- 42 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 43
4. TROUBLE SHOOTING
REFCLK1
REFCLK2
REFCLK3
VDDXO
NC4
XO2
XO1/REFIN
VTUNE
CLK_MODE
VSUP2b
GND1
PDET
TP1 : C131
(MAIN_CLK_26MHz)
A2
B3
A4
B5
A6
B7
A8
B9
A10
B11
A12
B13
C124 1n
1uC135
C131
TP1
MT6162
(U101)
SYSCLK
+2V8_VTCXO_MTK
1n
C134
PDET
0.1u
MAIN_CLK_26MHz
LGE Internal Use Only
- 43 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 44
4.1.2.3 Checking RF signal path (PAM)
START
4. TROUBLE SHOOTING
Check TP1(C110) at U102
Check if there is any major dierence referring
To Figure 4.1.1(b). Is any signal detected at that
point?
Yes
Check TP2(C176) at FL104
Check if there is any major dierence referring
To Figure 4.1.1(c). Is any signal detected at that
point?
Yes
Is any signal detected at
that point?
No
No
No
Check L102,C110, SW101
Check TP3(C179),TP4(C180), TP5(C181),
at U102. Is any DC signal detected
at that points?
Yes
Replace U102
Check C176
No
TX module is OK. See next page to check DPX
LGE Internal Use Only
Yes
The Problem may be Logic part
Refer to Logic troubleshoot
- 44 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 45
4. TROUBLE SHOOTING
TP3
TP4
TP5
U102
TX module
TP1
TP2
SW101
ANT
1
COMMON
G3 G4
43
LGE Internal Use Only
25
26
27
28
29
30
31
TP2
GND12
GND13
GND14
GND15
GND16
GND17
GND18
24
GND11
GND1
1
23
GND10
GND2
2
21
22
GND9
U102
HB_RFIN
3
4
20
ANT
GND8
VRAMP
LB_RFIN
5
W850_W900_TRX
W1900_2100_TRX
17
18
19
TRX6
TRX5
GND7
GND6
TRX3
TRX2
GND5
GND4
GND3
VBATT
TX_EN
MODE
BS2
BS1
6
9
8
7
16
15
14
13
12
11
10
TP1
2
C110 1.5n
C118
DNI
L102
100n
GND
- 45 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 46
4. TROUBLE SHOOTING
TP3
TP4
TP5
C179
100p
C180
100p
C181
100p
ANT_SEL1
ANT_SEL2
ANT_SEL0
GSM_PA_EN
C138
100p
Center Frequency : 942.6MHz
Figure 4.1.1 (b)
Center Frequency : 942.6MHz
LGE Internal Use Only
Figure 4.1.1 (c)
- 46 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 47
4.1.2.4 Checking RF signal path (FEM)
START
4. TROUBLE SHOOTING
Check TP1(C176) at FL104
Check if there is any major dierence referring
To Figure 4.1.1(b) Is any signal detected at
that point?
Yes
Is any signal detected at
that point?
Yes
All WCDMA_B8 Rx check is complete.
If the phone sill do not work ,replace main board
No
No
Check L118, L114, L112, L116
Replace FL104
LGE Internal Use Only
- 47 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 48
FL104 DPX
RX_W850_W900_INP
RX_W850_W900_INN
4. TROUBLE SHOOTING
B8 W900 TRX (W850)
W850_W900_TRX
L117
DNI
C176
18p
L118
5.1n
TP1
FL104
RX1
ANT
RX2
2
GND1
4 9
GND3 GND4
TX
GND5GND2
TP1
L112
1.5n
L114
15n
L116
1.5n
16
8
3
75
DNI
L113
LGE Internal Use Only
- 48 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 49
Center Frequency :
942.6MHz
4. TROUBLE SHOOTING
Figure 4.1.1 (b)
Center Frequency :
942.6MHz
Figure 4.1.1 (c)
LGE Internal Use Only
- 49 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 50
4.2 WCDMA Tx Part Trouble
4.2.1 WCDMA_B1 Tx
4. TROUBLE SHOOTING
START
WCDMA B1 Tx TEST SETUP
- Test Channel : 9750
- Sector Power : -55 dBm
1. Check
DC Power Supply Circuit
2. Check MT6162 XO
3. Check PA
4. Check DPX
5. Check PAM
Re download S/W & Cal
* There are no Test Points on the IQ Data Line. So It is impossible to check the IQ Data Wave form
LGE Internal Use Only
- 50 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 51
4. TROUBLE SHOOTING
MT6162
(U101)
MT6162
(U101)
RF3237
(U102)
DPX
(FL103)
LGE Internal Use Only
- 51 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 52
4.2.1.1 Checking DC Power supply circuit
START
4. TROUBLE SHOOTING
Check TP1(C113)
+1V8_VRF_MTK is OK?
Yes
Check TP2(C105)
+2V85_VRF_MTK is OK?
Yes
Check TP3(C134)
+2V8_VTCXO_MTK is OK?
Yes
No
No
No
The Problem may be Logic part
Refer to Logic troubleshoot
The Problem may be Logic part
Refer to Logic troubleshoot
The Problem may be Logic part
Refer to Logic troubleshoot
DC Po wer su pply Circuit is OK. See next
LGE Internal Use Only
Page to check XO circuit
- 52 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 53
4. TROUBLE SHOOTING
TP3: C134
(+2V8_VTCXO_MTK )
(+2V85_VRF_MTK )
+2V85_VRF_MTK
C1051u
BSI1_CLK
+1V8_VRF_MTK
C1131u
1u C112
TP2: C105
BSI1_DATA
+1V8_VIO_MTK
BSI1_CS1
C1141u
MT6162
(U101)
TP1 : C113
(+1V8_VRF_MTK )
BSI1_CS0
TP2
LGE Internal Use Only
L2
VSUP1
K1
VDD_18
H1
J2
VSUP2a
U101
G2
VDD_28b
TP1
1
B1
C2
D1
E2
F1
CLK
DATA0
EN
VINT
GND2
DATA1
REFCLK1
REFCLK2
REFCLK3
VDDXO
NC4
XO2
XO1/REFIN
VTUNE
CLK_MODE
VSUP2b
GND1
PGND
A2
B3
A4
B5
A6
B7
A8
B9
A10
B11
A12
C124 1n
- 53 -
SYSCLK
+2V8_VTCXO_MTK
C131
1uC135
TP3
1n
C134
MAIN_CLK_26MHz
0.1u
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 54
4.2.1.2 Checking MT6162 XO circuit
START
4. TROUBLE SHOOTING
Check TP1(C131)
Is it 26MHz?
No
Replace X101 and
then check TP1(C131)
Is it similar ?
No
Replace Main B/D
Yes
Yes
XO circuit is Ok. See next page
to check RF signal path
XO circuit is Ok. See next page
to check RF signal path.
LGE Internal Use Only
- 54 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 55
4. TROUBLE SHOOTING
REFCLK1
REFCLK2
REFCLK3
VDDXO
NC4
XO2
XO1/REFIN
VTUNE
CLK_MODE
VSUP2b
GND1
PDET
TP1 : C131
(MAIN_CLK_26MHz)
A2
B3
A4
B5
A6
B7
A8
B9
A10
B11
A12
B13
C124 1n
1uC135
C131
TP1
MT6162
(U101)
SYSCLK
+2V8_VTCXO_MTK
1n
C134
PDET
0.1u
MAIN_CLK_26MHz
LGE Internal Use Only
- 55 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 56
4.2.1.3 CChecking B1 TX PA
START
4. TROUBLE SHOOTING
Check TP1(C158) at U103
Check if there is any major dierence referring
To Figure 4.2.1.4 Is it similar ?
Yes
Check TP2(C157)at U103
Check if there is any major dierence referring
To Figure 4.2.1.4 Is it similar ?
No
Check TP3(C162) at U103 (VPWR)
Whether it is higher than 1.5V
Yes
No
Check C163, C164
Yes
PAM circuits OK See next page
No
The Problem may be Logic part
Refer to Logic troubleshoot
LGE Internal Use Only
Replace U103
- 56 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 57
TP1(RF IN)
4. TROUBLE SHOOTING
+3V4_VWPAM_MTK
C157 3.9p
C160
7.5n
TP2(RF OUT)
U103
PA
MT6162
RF3237
(U102)
(U101)
TP2(RF OUT)
Close to pin1
C166
100p
C151
2.2u
PA_R1
PA_R0
PA_ON_W1900_2100
DPX (FL103)
VBATT
W1900_W2100 TX
C163
6.8n
C158 4.7p
C164
DNI
W1900_2100_TX_IN
TP3
TP3
C162
C161
1n
2.2u
11
PGND
10 1
9 2
8 3
L111
DNI
7 4
6
CPL
U103
VCC1VCC2
RFINRFOUT
NCISO
VMODEGND
5
VEN
C152
1n
C165
100p
PDET
R106
27
LGE Internal Use Only
R107
27
R108
36
- 57 -
TP1(RF IN)
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 58
4. TROUBLE SHOOTING
TP1
Figure 4.2.1.4
TP2
LGE Internal Use Only
- 58 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 59
4.2.1.4 Checking RF signal path (DPX)
START
4. TROUBLE SHOOTING
Check TP1(L109) at FL103
Check if there is any major dierence referring
To Figure 4.1.1(b) Is any signal detected at
that point?
Yes
Is any signal detected at
that point?
Yes
DPX is OK. See next page to check PAM
No
No
Check L110
Replace FL103
LGE Internal Use Only
Figure 4.1.1 (b)
- 59 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 60
4. TROUBLE SHOOTING
U103
PA
B1 W2100 TRX(W1900)
C156
DNI
1.8n
L109
2.7n
L110
W1900_2100_TRX
TP1
MT6162
(U101)
FL103
ANT
2
GND1
4 9
GND3 GND4
DPX (FL103)
16
RX1
8
RX2
3
TX
GND5GND2
75
TP1
RF3237
(U102)
C147
5p
L108
4.7n
C153
5p
C148
DNI
C150
DNI
RX_W1900_W2100_INN
C149
DNI
RX_W1900_W2100_INP
LGE Internal Use Only
- 60 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 61
4.2.1.5 Checking RF signal path (PAM)
START
4. TROUBLE SHOOTING
Check TP1(C110) at U102
Check if there is any major dierence referring
To Figure 4.1.1(b). Is any signal detected at that
point?
Yes
Check TP2(L109) at FL104
Check if there is any major dierence referring
To Figure 4.1.1(c). Is any signal detected at that
point?
Yes
Is any signal detected at
that point?
No
No
No
Check L102,C110, SW101
Check TP3(C179),TP4(C180), TP5(C181),
at U102. Is any DC signal detected
at that points?
Yes
Replace U102
Check L109
No
TX module is OK. See next page to check DPX
LGE Internal Use Only
Yes
The Problem may be Logic part
Refer to Logic troubleshoot
- 61 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 62
4. TROUBLE SHOOTING
TP4
TP5
TP3
U102
TX module
TP1
TP2
TP2
TP1
W850_W900_TRX
W1900_2100_TRX
SW101
ANT
1
COMMON
G3 G4
43
2
C110 1.5n
C118
DNI
L102
100n
24
23
21
22
17
18
19
20
LGE Internal Use Only
- 62 -
ANT
TRX6
TRX5
GND7
GND8
GND9
GND10
GND11
GND12
25
GND13
26
GND14
27
GND15
28
GND16
29
GND17
30
GND18
31
1
GND1
2
U102
GND2
3
HB_RFIN
LB_RFIN
5
4
VRAMP
GND6
16
TRX3
15
TRX2
14
GND5
13
GND4
12
GND3
11
VBATT
10
TX_EN
MODE
BS2
BS1
6
9
8
7
GND
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 63
4. TROUBLE SHOOTING
TP3
TP4
TP5
C179
100p
C180
100p
C181
100p
ANT_SEL1
ANT_SEL2
ANT_SEL0
GSM_PA_EN
C138
100p
LGE Internal Use Only
Figure 4.1.1 (b)
- 63 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 64
4.2.2 WCDMA_B8 Tx
4. TROUBLE SHOOTING
START
WCDMA B8 Tx TEST SETUP
- Test Channel : 2788
- Sector Power : -55 dBm
1. Check
DC Power Supply circuit
2. Check MT6162 XO
3. Check PA
4. Check DPX
5. Check PAM
Re download S/W & Cal
* There are no Test Points on the IQ Data Line. So It is impossible to check the IQ Data Wave form
LGE Internal Use Only
- 64 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 65
4. TROUBLE SHOOTING
PAM
(U103)
MT6162
(U101)
RF3237
(U102)
DPX
(FL104)
LGE Internal Use Only
- 65 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 66
4.2.2.1 Checking DC Power supply circuit
START
4. TROUBLE SHOOTING
Check TP1(C113)
+1V8_VRF_MTK is OK?
Yes
Check TP2(C105)
+2V85_VRF_MTK is OK?
Yes
Check TP3(C134)
+2V8_VTCXO_MTK is OK?
Yes
No
No
No
The Problem may be Logic part
Refer to Logic troubleshoot
The Problem may be Logic part
Refer to Logic troubleshoot
The Problem may be Logic part
Refer to Logic troubleshoot
DC Po wer su pply Circuit is OK. See next
LGE Internal Use Only
Page to check XO circuit
- 66 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 67
4. TROUBLE SHOOTING
TP3: C134
(+2V8_VTCXO_MTK )
(+2V85_VRF_MTK )
+2V85_VRF_MTK
C1051u
BSI1_CLK
+1V8_VRF_MTK
C1131u
1u C112
TP2: C105
BSI1_DATA
+1V8_VIO_MTK
BSI1_CS1
C1141u
MT6162
(U101)
TP1 : C113
(+1V8_VRF_MTK )
BSI1_CS0
TP2
LGE Internal Use Only
L2
VSUP1
K1
VDD_18
H1
J2
VSUP2a
U101
G2
VDD_28b
TP1
1
B1
C2
D1
E2
F1
CLK
DATA0
EN
VINT
GND2
DATA1
REFCLK1
REFCLK2
REFCLK3
VDDXO
NC4
XO2
XO1/REFIN
VTUNE
CLK_MODE
VSUP2b
GND1
PGND
A2
B3
A4
B5
A6
B7
A8
B9
A10
B11
A12
C124 1n
- 67 -
SYSCLK
+2V8_VTCXO_MTK
C131
1uC135
TP3
1n
C134
MAIN_CLK_26MHz
0.1u
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 68
4.2.2.2 Checking MT6162 XO circuit
START
4. TROUBLE SHOOTING
Check TP1(C131)
Is it 26MHz?
No
Replace X101 and
then check TP1(C131)
Is it similar ?
No
Replace Main B/D
Yes
Yes
XO circuit is Ok. See next page
to check RF signal path
XO circuit is Ok. See next page
to check RF signal path.
LGE Internal Use Only
- 68 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 69
4. TROUBLE SHOOTING
REFCLK1
REFCLK2
REFCLK3
VDDXO
NC4
XO2
XO1/REFIN
VTUNE
CLK_MODE
VSUP2b
GND1
PDET
TP1 : C131
(MAIN_CLK_26MHz)
A2
B3
A4
B5
A6
B7
A8
B9
A10
B11
A12
B13
C124 1n
1uC135
C131
TP1
MT6162
(U101)
SYSCLK
+2V8_VTCXO_MTK
1n
C134
PDET
0.1u
MAIN_CLK_26MHz
LGE Internal Use Only
- 69 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 70
4.2.2.3 Checking B8 TX PA
START
4. TROUBLE SHOOTING
Check TP1(L115) at U104
Check if there is any major dierence referring
To Figure 4.2.1.4 Is it similar ?
Yes
Check TP2(C177)at U104
Check if there is any major dierence referring
To Figure 4.2.1.4 Is it similar ?
No
Check TP3(C171) at U104 (VPWR)
Whether it is higher than 1.5V
Yes
No
Check C172
Yes
PAM circuits OK See next page
No
The Problem may be Logic part
Refer to Logic troubleshoot
LGE Internal Use Only
Replace U104
- 70 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 71
TP3
MT6162
(U101)
4. TROUBLE SHOOTING
RF3237
(U102)
+3V4_VWPAM_MTK
C177 1.8n
C178
18n
L119
1.8p
TP2(RF OUT)
TP1(RF IN)
TP3
C171
1n
11
PGND
10 1
9 2
8 3
7 4
6
CPL
R111
49.9
U104 PA
U104
VCC1VCC2
RFINRFOUT
NCISO
VMODEGND
VEN
TP2(RF OUT)
C167
1n
Close to pin1
5
C175
C174
100p
100p
DPX (FL104)
VBATT
C168
2.2u
PA_R1
PA_R0
PA_ON_W850_W900
TP1(RF IN)
L115 100p
C172
10n
W850_W900 TX
W850_W900_TX_IN
C173
DNI
LGE Internal Use Only
- 71 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 72
Center Frequency :
897.6MHz
4. TROUBLE SHOOTING
TP1
Center Frequency :
897.6MHz
TP2
Figure 4.2.1.4
LGE Internal Use Only
- 72 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 73
4.2.2.4 Checking RF signal path (DPX)
START
4. TROUBLE SHOOTING
Check TP1(C176) at FL104
Check if there is any major dierence referring
To Figure 4.1.1(b) Is any signal detected at
that point?
Yes
Is any signal detected at
that point?
Yes
DPX is OK. See next page to check PAM
No
No
Check L118
Replace FL104
LGE Internal Use Only
Center Frequency :
897.6MHz
Figure 4.1.1 (b)
- 73 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 74
TP1
RX_W850_W900_INP
RX_W850_W900_INN
4. TROUBLE SHOOTING
B8 W900 TRX (W850)
W850_W900_TRX
L117
DNI
C176
18p
TP1
DPX (FL104)
L118
5.1n
2
4 9
FL104
ANT
GND1
GND3 GND4
L112
1.5n
L114
15n
L116
1.5n
16
RX1
8
RX2
3
TX
GND5GND2
75
DNI
L113
LGE Internal Use Only
- 74 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 75
4.2.2.5 Checking RF signal path (TX Module)
START
4. TROUBLE SHOOTING
Check TP1(C110) at U102
Check if there is any major dierence referring
To Figure 4.1.1(b). Is any signal detected at that
point?
Yes
Check TP2(C176) at FL104
Check if there is any major dierence referring
To Figure 4.1.1(c). Is any signal detected at that
point?
Yes
Is any signal detected at
that point?
No
No
No
Check L102,C110, SW101
Check TP3(C179),TP4(C180), TP5(C181),
at U102. Is any DC signal detected
at that points?
Yes
Replace U102
Check C176
No
TX module is OK. See next page to check DPX
LGE Internal Use Only
Yes
The Problem may be Logic part
Refer to Logic troubleshoot
- 75 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 76
4. TROUBLE SHOOTING
TP4
TP5
TP3
U102
TX module
TP1
TP2
TP1
SW101
ANT
1
COMMON
G3 G4
43
2
C110 1.5n
C118
DNI
L102
100n
TP2
24
23
W850_W900_TRX
W1900_2100_TRX
17
18
19
21
22
20
LGE Internal Use Only
- 76 -
ANT
TRX6
TRX5
GND7
GND8
GND9
GND10
GND11
GND12
25
GND13
26
GND14
27
GND15
28
GND16
29
GND17
30
GND18
31
1
GND1
2
U102
GND2
3
HB_RFIN
LB_RFIN
5
4
VRAMP
GND6
16
TRX3
15
TRX2
14
GND5
13
GND4
12
GND3
11
VBATT
10
TX_EN
MODE
BS2
BS1
6
9
8
7
GND
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 77
4. TROUBLE SHOOTING
TP3
TP4
TP5
C179
100p
C180
100p
C181
100p
ANT_SEL1
ANT_SEL2
ANT_SEL0
GSM_PA_EN
C138
100p
Center Frequency :
897.6MHz
Figure 4.1.1 (b)
LGE Internal Use Only
- 77 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 78
4.3 GSM Rx Part Troubleshooting
4.3.1 GSM850/900 Rx
Rx TEST SETUP
- BCH :GSM850 /EGSM for GSM900
- TCH: GSM850 / EGSM for GSM900
- Channel : 190 / 37 for GSM 900
- Sector Power : -30 dBm
4. TROUBLE SHOOTING
START
1. Check
DC Power Supply circuit
2. Check MT6162 XO
3. Check RF Signal path
Re download S/W & Cal
* There are no Test Points on the IQ Data Line. So It is impossible to check the IQ Data Wave form
LGE Internal Use Only
- 78 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 79
SAW lter
(FL102)
4. TROUBLE SHOOTING
MT6162
(U101)
RF3237
(U102)
LGE Internal Use Only
- 79 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 80
4.3.1.1 Checking DC Power supply circuit
START
4. TROUBLE SHOOTING
Check TP1(C113)
+1V8_VRF_MTK is OK?
Yes
Check TP2(C105)
+2V85_VRF_MTK is OK?
Yes
Check TP3(C134)
+2V8_VTCXO_MTK is OK?
Yes
No
No
No
The Problem may be Logic part
Refer to Logic troubleshoot
The Problem may be Logic part
Refer to Logic troubleshoot
The Problem may be Logic part
Refer to Logic troubleshoot
DC Po wer su pply Circuit is OK. See next
LGE Internal Use Only
Page to check XO circuit
- 80 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 81
4. TROUBLE SHOOTING
TP3: C134
(+2V8_VTCXO_MTK )
(+2V85_VRF_MTK )
+2V85_VRF_MTK
C1051u
BSI1_CLK
+1V8_VRF_MTK
TP2: C105
BSI1_DATA
+1V8_VIO_MTK
BSI1_CS1
MT6162
(U101)
TP1 : C113
(+1V8_VRF_MTK )
BSI1_CS0
TP2
LGE Internal Use Only
1u C112
L2
VSUP1
K1
VDD_18
C1131u
H1
J2
VSUP2a
U101
G2
VDD_28b
TP1
C1141u
1
B1
C2
D1
E2
F1
CLK
DATA0
EN
VINT
GND2
DATA1
REFCLK1
REFCLK2
REFCLK3
VDDXO
NC4
XO2
XO1/REFIN
VTUNE
CLK_MODE
VSUP2b
GND1
PGND
A2
B3
A4
B5
A6
B7
A8
B9
A10
B11
A12
C124 1n
- 81 -
SYSCLK
+2V8_VTCXO_MTK
C131
1uC135
TP3
1n
C134
MAIN_CLK_26MHz
0.1u
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 82
4.3.1.2 Checking MT6162 XO circuit
START
4. TROUBLE SHOOTING
Check TP1(C131)
Is it 26MHz?
No
Replace X101 and
then check TP1(C131)
Is it similar ?
No
Replace Main B/D
Yes
Yes
XO circuit is Ok. See next page
to check RF signal path
XO circuit is Ok. See next page
to check RF signal path.
LGE Internal Use Only
- 82 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 83
4. TROUBLE SHOOTING
REFCLK1
REFCLK2
REFCLK3
VDDXO
NC4
XO2
XO1/REFIN
VTUNE
CLK_MODE
VSUP2b
GND1
PDET
TP1 : C131
(MAIN_CLK_26MHz)
A2
B3
A4
B5
A6
B7
A8
B9
A10
B11
A12
B13
C124 1n
1uC135
C131
TP1
MT6162
(U101)
SYSCLK
+2V8_VTCXO_MTK
1n
C134
PDET
0.1u
MAIN_CLK_26MHz
LGE Internal Use Only
- 83 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 84
4.3.1.3 Checking RF signal path (TX Module)
START
4. TROUBLE SHOOTING
Check TP1(C110) at U102
Check if there is any major dierence referring
To Figure 4.1.1(b). Is any signal detected at that
point?
Yes
Check TP2(C130) at U102
Check if there is any major dierence referring
To Figure 4.1.1(c). Is any signal detected at that
point?
Yes
Is any signal detected at
that point?
No
No
No
Check L102,C110, SW101
Check TP3(C179),TP4(C180),TP5(C181),
at U102. Is any DC signal detected
at that points?
Yes
Replace U102
Check C175, L108
No
TX module is OK. See next page to check SAW lter
LGE Internal Use Only
Yes
- 84 -
The Problem may be Logic part
Refer to Logic troubleshoot
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 85
4. TROUBLE SHOOTING
TP4
TP5
TP3
U102
TX module
TP2
TP1
C117 1.5n
TP1
SW101
ANT
1
G3 G4
COMMON
43
2
C110 1.5n
C118
DNI
L102
100n
25
26
27
28
29
30
31
GND
GND12
GND13
GND14
GND15
GND16
GND17
GND18
24
1
23
GND11
GND1
2
22
GND10
U102
GND2
3
GND9
HB_RFIN
21
GND8
LB_RFIN
4
20
ANT
VRAMP
5
19
6
W850_W900_TRX
W1900_2100_TRX
17
18
TRX6
TRX5
GND7
GND6
16
TRX3
15
TRX2
14
GND5
13
GND4
12
GND3
11
VBATT
10
TX_EN
MODE
BS2
BS1
987
TP2
C130 1.2n
L106
12n
L103
4.7n
LGE Internal Use Only
- 85 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 86
ANT_SEL1
TP3
4. TROUBLE SHOOTING
TP4
4.3.1.4 Checking RF Flow(SAW lter)
START
TP5
C179
100p
C180
100p
C181
100p
ANT_SEL2
ANT_SEL0
GSM_PA_EN
C138
100p
Check TP1(C126) for 900band at FL102
Check TP2(C133) for 850band at FL102
Check if there is any major dierence referring
To Figure 4.1.1(b) Is any signal detected at
that point?
Yes
SAW lter is OK. Replace main B/D.
Yes
No
Replace FL102
To Figure 4.1.1(b) Is any signal detected at
that point
No
Check C126, C132, L105, C133, C136, L107
LGE Internal Use Only
- 86 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 87
4. TROUBLE SHOOTING
C130 1.2n
L106
12n
TP1
FL102
IN
GND O2_2
C_G1
C_G2
O1_1
O1_2
O2_1
C_G3
10532
GND
TP2
FL102
TP1
1nC126
PRX_GSM900_INN
91
8
7
64
C_G4
C132 1n
1nC133
TP2
C136 1n
L105
15n
PRX_GSM900_INP
PRX_GSM850_INP
L107
18n
PRX_GSM850_INN
LGE Internal Use Only
- 87 -
2mm
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 88
Figure 4.1.1 (b)
4. TROUBLE SHOOTING
LGE Internal Use Only
Figure 4.1.1 (c)
- 88 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 89
4.3.2 GSM1800/1900 Rx
4. TROUBLE SHOOTING
START
Rx TEST SETUP
- BCH :GSM1800/GSM1900
- TCH: GSM1800/GSM1900
- Channel : 698ch/610ch
- Sector Power : -30 dBm
1. Check
DC Power Supply circuit
2. Check MT6162 XO
3. Check RF Signal path
Re download S/W & Cal
* There are no Test Points on the IQ Data Line. So It is impossible to check the IQ Data Wave form
LGE Internal Use Only
- 89 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 90
MT6162
(U101)
SAW lter
(FL101)
4. TROUBLE SHOOTING
RF3237
(U102)
LGE Internal Use Only
- 90 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 91
4.3.2.1 Checking DC Power supply circuit
START
4. TROUBLE SHOOTING
Check TP1(C113)
+1V8_VRF_MTK is OK?
Yes
Check TP2(C105)
+2V85_VRF_MTK is OK?
Yes
Check TP3(C134)
+2V8_VTCXO_MTK is OK?
Yes
No
No
No
The Problem may be Logic part
Refer to Logic troubleshoot
The Problem may be Logic part
Refer to Logic troubleshoot
The Problem may be Logic part
Refer to Logic troubleshoot
DC Po wer su pply Circuit is OK. See next
LGE Internal Use Only
Page to check XO circuit
- 91 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 92
4. TROUBLE SHOOTING
TP3: C134
(+2V8_VTCXO_MTK )
(+2V85_VRF_MTK )
+2V85_VRF_MTK
C1051u
BSI1_CLK
+1V8_VRF_MTK
C1131u
1u C112
TP2: C105
BSI1_DATA
+1V8_VIO_MTK
BSI1_CS1
C1141u
MT6162
(U101)
TP1 : C113
(+1V8_VRF_MTK )
BSI1_CS0
TP2
LGE Internal Use Only
L2
VSUP1
K1
VDD_18
H1
J2
VSUP2a
U101
G2
VDD_28b
TP1
1
B1
C2
D1
E2
F1
CLK
DATA0
EN
VINT
GND2
DATA1
REFCLK1
REFCLK2
REFCLK3
VDDXO
NC4
XO2
XO1/REFIN
VTUNE
CLK_MODE
VSUP2b
GND1
PGND
A2
B3
A4
B5
A6
B7
A8
B9
A10
B11
A12
C124 1n
- 92 -
SYSCLK
+2V8_VTCXO_MTK
C131
1uC135
TP3
1n
C134
MAIN_CLK_26MHz
0.1u
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 93
4.3.2.2 Checking MT6162 XO circuit
START
4. TROUBLE SHOOTING
Check TP1(C131)
Is it 26MHz?
No
Replace X101 and
then check TP1(C131)
Is it similar ?
No
Replace Main B/D
Yes
Yes
XO circuit is Ok. See next page
to check RF signal path
XO circuit is Ok. See next page
to check RF signal path.
LGE Internal Use Only
- 93 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 94
4. TROUBLE SHOOTING
REFCLK1
REFCLK2
REFCLK3
VDDXO
NC4
XO2
XO1/REFIN
VTUNE
CLK_MODE
VSUP2b
GND1
PDET
TP1 : C131
(MAIN_CLK_26MHz)
A2
B3
A4
B5
A6
B7
A8
B9
A10
B11
A12
B13
C124 1n
1uC135
C131
TP1
MT6162
(U101)
SYSCLK
+2V8_VTCXO_MTK
1n
C134
PDET
0.1u
MAIN_CLK_26MHz
LGE Internal Use Only
- 94 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 95
4.3.2.3 Checking RF signal path (TX module)
START
4. TROUBLE SHOOTING
Check TP1(C110) at U102
Check if there is any major dierence referring
To Figure 4.1.1(b). Is any signal detected at that
point?
Yes
Check TP2(C117) at U102
Check if there is any major dierence referring
To Figure 4.1.1(c). Is any signal detected at that
point?
Yes
Is any signal detected at
that point?
No
No
No
Check L102,C110, SW101
Check TP3(C179),TP4(C180),TP5(C181),
at U102. Is any DC signal detected
at that points?
Yes
Replace U102
Check C117, L103
No
TX module is OK. See next page to check SAW lter
LGE Internal Use Only
Yes
- 95 -
The Problem may be Logic part
Refer to Logic troubleshoot
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 96
4. TROUBLE SHOOTING
TP4
TP5
TP3
U102
TX module
TP1
TP2
C117 1.5n
TP1
SW101
ANT
1
G3 G4
COMMON
43
2
C110 1.5n
C118
DNI
L102
100n
25
26
27
28
29
30
31
GND
GND12
GND13
GND14
GND15
GND16
GND17
GND18
24
1
23
GND11
GND1
2
22
GND10
U102
GND2
3
GND9
HB_RFIN
21
GND8
LB_RFIN
4
20
ANT
VRAMP
5
19
6
W850_W900_TRX
W1900_2100_TRX
17
18
TRX6
TRX5
GND7
GND6
16
TRX3
15
TRX2
14
GND5
13
GND4
12
GND3
11
VBATT
10
TX_EN
MODE
BS2
BS1
987
TP2
C130 1.2n
L106
12n
L103
4.7n
LGE Internal Use Only
- 96 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 97
ANT_SEL1
TP3
4. TROUBLE SHOOTING
TP4
4.3.2.4 Checking RF Flow(SAW lter)
START
TP5
C179
100p
C180
100p
C181
100p
ANT_SEL2
ANT_SEL0
GSM_PA_EN
C138
100p
Check TP1(C106) for 1900band at FL101
Check TP2(C123) for 1800band at FL101
Check if there is any major dierence referring
To Figure 4.1.1(b) Is any signal detected at
that point?
Yes
SAW lter is OK. Replace main B/D.
Yes
No
Replace FL101
To Figure 4.1.1(b) Is any signal detected at
that point
No
Check C106,,C122,L101,C123,C125,L104
LGE Internal Use Only
- 97 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 98
4. TROUBLE SHOOTING
C117 1.5n
L103
4.7n
TP1
FL101
IN
C_C5 O2_2
C_G1
O1_1
O1_2
O2_1
C_G2
C_G3
10532
TP2
FL101
TP1
1.5nC106
PRX_GSM1900_INN
91
8
7
64
C_G4
C122 1.5n
C123 1n
TP2
1nC125
L101
4.7n
PRX_GSM1900_INP
PRX_GSM1800_INN
L104
3.9n
PRX_GSM1800_INP
LGE Internal Use Only
- 98 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 99
Figure 4.1.1 (b)
4. TROUBLE SHOOTING
Figure 4.1.1 (c)
LGE Internal Use Only
- 99 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Page 100
4.4 GSM Tx Part Troubleshooting
4.4.1 GSM850/900 Tx
4. TROUBLE SHOOTING
MT6162
(U101)
RF3237
(U102)
LGE Internal Use Only
- 100 -
Copyright © 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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