LG BL42k User manual
Service Manual Model : BL42k
Internal Use Only
Service Manual
BL42k
Date: December, 2009 / Issue 1.0
- 3 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Table Of Contents
1. INTRODUCTION...............................................5
1.1 Purpose......................................................................5
1.2 Regulatory Information.................................................5
2. PERFORMANCE............................................... 7
2.1 Product Name .............................................................7
2.2 Supporting Standard....................................................7
2.3 Main Parts : GSM Solution ...........................................7
2.4 HW Features ..............................................................8
2.5 SW Features .............................................................10
2.6 HW SPEC..................................................................12
3. TECHNICAL BRIEF......................................... 16
3.1 GENERAL DESCRIPTION.............................................16
3.2 GSM MODE...............................................................17
3.3 UMTS MODE.............................................................21
3.4 OFF-CHIP RF COMPONENTS......................................26
3.5 OFF-CHIP COMPONENTS...........................................29
3.6 General Description ...................................................33
3.7 Power management ..................................................45
3.8 SUB SYSTEM ............................................................50
4. TROUBLE SHOOTING..................................... 59
4.1 RF Component ..........................................................59
4.2 RF Path ....................................................................61
4.3 Trouble Shooting of GSM Part (GSM900/1800/1900) ..63
4.4 Trouble Shooting of WCDMA part................................71
4.5 Checking Bluetooth Block ..........................................77
4.6 Checking FM Radio Block ..........................................82
4.7 Power ON Troubleshooting .........................................85
4.8 Charger Troubleshooting ............................................88
4.9 USB Troubleshooting..................................................89
4.10 USIM Detect Troubleshooting....................................90
4.11 Camera Troubleshooting ..........................................93
4.12 Main side view LED Troubleshooting .........................95
4.13 Slide Key side view LED Troubleshooting ...................97
4.14 LCD Troubleshooting................................................99
4.15 Vibrator Troubleshooting.........................................101
4.16 Receiver Path........................................................102
4.17 Headset path.........................................................105
4.18 Speaker phone path ..............................................107
4.19 Main microphone ..................................................110
4.20 Headset microphone..............................................112
5. Download ................................................... 114
5.1 Introduction.............................................................114
5.2 Downloading Procedure...........................................115
5.3 Troubleshooting Download Errors..............................131
5.4 Caution...................................................................136
6. Block Diagram ........................................... 137
7. CIRCUIT DIAGRAM...................................... 147
8. BGA Pin Map ..............................................161
9. PCB LAYOUT ...............................................167
10. Calibration................................................ 177
11. Test Mode.................................................180
12. EXPLODED VIEW & REPLACEMENT
PART LIST ................................................189
12.1 EXPLODED VIEW ...................................................189
12.2 Replacement Parts ................................................191
12.3 Accessory .............................................................215
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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. INTRODUCTION
1. INTRODUCTION
isYWG
G
1. Introduction
1.1. Purpose
This manual provides the information necessary to repair, calibration, description and download the
features of this model.
1.2. Regulatory Information
A. Security
Toll fraud, the unauthorized use of telecommunications system by an unauthorized part (for example,
persons other than your company’s employees, agents, subcontractors, or person working on your
company’s behalf) can result in substantial additional charges for your telecommunications services.
System users are responsible for the security of own system.
There are may be risks of toll fraud associated with your telecommunications system. System users
are responsible for programming and configuring the equipment to prevent unauthorized use. The
manufacturer does not warrant that this product is immune from the above case but will prevent
unauthorized use of common carrier telecommunication service of facilities accessed through or
connected to it. The manufacturer will not be responsible for any charges that result from such
unauthorized use.
B. Incidence of Harm
If a telephone company determines that the equipment provided to customer is faulty and possibly
causing harm or interruption in service to the telephone network, it should disconnect telephone
service until repair can be done. A telephone company may temporarily disconnect service as long as
repair is not done.
C. Changes in Service
A local telephone company may make changes in its communications facilities or procedure. If these
changes could reasonably be expected to affect the use of the phones or compatibility with the net
work, the telephone company is required to give advanced written notice to the user, allowing the user
to take appropriate steps to maintain telephone service.
D. Maintenance Limitations
Maintenance limitations on the phones must be performed only by the manufacturer or its authorized
agent. The user may not make any changes and/or repairs expect as specifically noted in this manual.
Therefore, note that unauthorized alternations or repair may affect the regulatory status of the system
and may void any remaining warranty.
E. Notice of Radiated Emissions
This model complies with rules regarding radiation and radio frequency emission as defined by local
regulatory agencies. In accordance with these agencies, you may be required to provide information
such as the following to the end user.
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Only for training and service purposes
1. INTRODUCTION
isYWG
G
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.
G
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Copyright © 2009 LG Electronics. Inc. All right reserved.
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2. PERFORMANCE
2. PERFORMANCE
BL42K Product SPEC
3
2.1 Product Name
BL42K : WCDMA900/2100+EGSM/DCS/PCS
(HSDPA 3.6Mbps / GPRS Class 10 / EDGE Class 10)
2.2 Supporting Standard
Item Feature Comment
Supporting
Standard
WCDMA(FDD1,8)/EGSM/DCS1800/PCS1900 with
seamless handover
Phase 2+(include AMR)
SIM Toolkit : Class 1, 2, 3, C-E
Frequency Range 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
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, JAVA 2.0
2.3 Main Parts : GSM Solution
Item Part Name Comment
Digital Baseband QSC6270 : Qualcomm
Analog Baseband QSC6270 : Qualcomm
RF Chip QSC6270 : Qualcomm
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2. PERFORMANCE
BL42K Product SPEC
4
2.4 HW Features
Item Feature Comment
Form Factor Slider type
1) Capacity
Standard : Li-Ion, 900mAh
Battery
2) Packing Type : Soft Pack
Size Standard :
106.9 X 50.8 X 12.3mm
Weight 115g With Battery
Volume TBD
PCB LX-BUMP 2 10 Layers
Stand by time 2G Up to 300 hrs
3G Up to 300 hrs
@ Paging Period 5 (2G)
@ DRX 7 (3G)
Charging time 4 hrs @ Power Off / 900mAh
Talk time 2G Up to 180mins
3G Up to 110 mins
@ Power Level 5 (2G)
@ Tx = 12dBm (3G)
RX sensitivity WCDMA(FDD1) : -106.7 dBm
WCDMA(FDD8) : -103.7 dBm
EGSM : -105 dBm
DCS 1800 : -105 dBm
PCS 1900 : -105 dBm
WCDMA/
GSM/
GPRS
WCDMA : 24dBm/3.84MHz,+1/-3dBm
EGSM : 33dBm
DCS 1800 : 30 dBm
PCS 1900 : 30 dBm
Class3(WCDMA)
Class4 (EGSM)
Class1 (PCS)
Class1 (DCS)
TX output
power
EDGE GSM 900 : 27 dBm
DCS 1800 : 26 dBm
PCS 1900 : 26 dBm
E2 (GSM900)
E2 (PCS)
E2 (DCS)
GPRS compatibility GPRS Class 10
EDGE compatibility EDGE Class 10
SIM card type Plug-In SIM
3V /1.8V
Display 2.4”TFT QVGA
Built-in Camera 5M CMOS Camera
1.3M CMOS Camera (VGA)
Status Indicator Yes
Keypad Function Key : 4
Navigation Key : 5
Navigation Key:
Cancel Key, Menu Key,
Send Key, END/PWR Key
ANT Main : Internal Fixed Type
System connector 5 Pin
Ear Phone Jack 3.5Phi, 4 Pole, Stereo
PC synchronization Yes
Memory NAND Flash : 2Gbit
SDRAM : 1Gbit
Speech coding FR, EFR, HR,AMR
BL42K Product SPEC
4
2.4 HW Features
Item Feature Comment
Form Factor Slider type
1) Capacity
Standard : Li-Ion, 900mAh
Battery
2) Packing Type : Soft Pack
Size Standard :
106.9 X 50.8 X 12.3mm
Weight 115g With Battery
Volume TBD
PCB LX-BUMP 2 10 Layers
Stand by time 2G Up to 300 hrs
3G Up to 300 hrs
@ Paging Period 5 (2G)
@ DRX 7 (3G)
Charging time 4 hrs @ Power Off / 900mAh
Talk time 2G Up to 180mins
3G Up to 110 mins
@ Power Level 5 (2G)
@ Tx = 12dBm (3G)
RX sensitivity WCDMA(FDD1) : -106.7 dBm
WCDMA(FDD8) : -103.7 dBm
EGSM : -105 dBm
DCS 1800 : -105 dBm
PCS 1900 : -105 dBm
WCDMA/
GSM/
GPRS
WCDMA : 24dBm/3.84MHz,+1/-3dBm
EGSM : 33dBm
DCS 1800 : 30 dBm
PCS 1900 : 30 dBm
Class3(WCDMA)
Class4 (EGSM)
Class1 (PCS)
Class1 (DCS)
TX output
power
EDGE GSM 900 : 27 dBm
DCS 1800 : 26 dBm
PCS 1900 : 26 dBm
E2 (GSM900)
E2 (PCS)
E2 (DCS)
GPRS compatibility GPRS Class 10
EDGE compatibility EDGE Class 10
SIM card type Plug-In SIM
3V /1.8V
Display 2.4”TFT QVGA
Built-in Camera 5M CMOS Camera
1.3M CMOS Camera (VGA)
Status Indicator Yes
Keypad Function Key : 4
Navigation Key : 5
Navigation Key:
Cancel Key, Menu Key,
Send Key, END/PWR Key
ANT Main : Internal Fixed Type
System connector 5 Pin
Ear Phone Jack 3.5Phi, 4 Pole, Stereo
PC synchronization Yes
Memory NAND Flash : 2Gbit
SDRAM : 1Gbit
Speech coding FR, EFR, HR,AMR
- 9 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
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LGE Internal Use Only
2. PERFORMANCE
BL42K Product SPEC
5
Data & Fax Built in Data & Fax support
Vibrator Built in Vibrator
Blue Tooth V2.1,A2DP
MIDI(for Buzzer
Function)
SW Decoded 64Poly
Music Player MP3/AAC/AAC+/WMA
Video Player MPEG4, H.263 40fps@QVGA
Camcorder MPEG4, 15fps@QVGA
Voice Recording Yes
Speaker Phone mode
Support
Yes
Travel Adapter Yes
CDROM Yes
Stereo Headset Yes
Data Cable Yes
T-Flash
(External Memory)
Yes
- 10 -
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2. PERFORMANCE
BL42K Product SPEC
6
2.5 SW Features
Item Feature Comment
RSSI 0 ~ 7 Levels
Battery Charging 0 ~ 3 Levels
Key Volume 0 ~ 7 Level
Audio Volume 1 ~ 20 Level
Time / Date Display Yes
Multi-Language Yes (English,German,Dutch,Czech,
Hungarian,Croatian,Polish,
Slovak,Turkish,French,
Italian,Spanish,Swedish,
Danish,Romanian,Greek,
Portuguese,Bulgarian,
TradChinese,SimpChinese,
Russian,Slovenian,Korean,Icela
ndic)
Quick Access Mode Dialing / Call Log / Contact / Menu /
Message / Camera / Favorite
PC Sync Schedule / Phonebook / MEMO /
SMS / Download (Photo, file)
Speed Dial Yes (1~9) Voice mail center -> 1 key
Profile Yes
CLIP / CLIR Yes
Phone Book Name + 5 Numbers + 1 Memo + 2 e-
mail + 3 Group Select + Picture +
Ringtone + Anniversary day
Total 1000 Member
Last Dial Number Yes Total Call DB Max 100
LDN (SIM) N/A
Last Received
Number
Yes Total Call DB Max 100
LDN (SIM) N/A
Last Missed Number Yes Total Call DB Max 100
LDN (SIM) N/A
Search by Number
/ Name
Name and Number
Group 30
Fixed Dial Number Yes
Service Dial Number Yes
Own Number Yes
Voice Memo Yes
Call Reminder Yes
Network Selection Automatic
Mute Yes
Call Divert Yes
Call Barring Yes
Call Charge (AoC) Yes
Call Duration Yes
SMS (EMS) 1000 EMS : Release4
(Except Text align)
BL42K Product SPEC
6
2.5 SW Features
Item Feature Comment
RSSI 0 ~ 7 Levels
Battery Charging 0 ~ 3 Levels
Key Volume 0 ~ 7 Level
Audio Volume 1 ~ 20 Level
Time / Date Display Yes
Multi-Language Yes (English,German,Dutch,Czech,
Hungarian,Croatian,Polish,
Slovak,Turkish,French,
Italian,Spanish,Swedish,
Danish,Romanian,Greek,
Portuguese,Bulgarian,
TradChinese,SimpChinese,
Russian,Slovenian,Korean,Icela
ndic)
Quick Access Mode Dialing / Call Log / Contact / Menu /
Message / Camera / Favorite
PC Sync Schedule / Phonebook / MEMO /
SMS / Download (Photo, file)
Speed Dial Yes (1~9) Voice mail center -> 1 key
Profile Yes
CLIP / CLIR Yes
Phone Book Name + 5 Numbers + 1 Memo + 2 e-
mail + 3 Group Select + Picture +
Ringtone + Anniversary day
Total 1000 Member
Last Dial Number Yes Total Call DB Max 100
LDN (SIM) N/A
Last Received
Number
Yes Total Call DB Max 100
LDN (SIM) N/A
Last Missed Number Yes Total Call DB Max 100
LDN (SIM) N/A
Search by Number
/ Name
Name and Number
Group 30
Fixed Dial Number Yes
Service Dial Number Yes
Own Number Yes
Voice Memo Yes
Call Reminder Yes
Network Selection Automatic
Mute Yes
Call Divert Yes
Call Barring Yes
Call Charge (AoC) Yes
Call Duration Yes
SMS (EMS) 1000 EMS : Release4
(Except Text align)
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Copyright © 2009 LG Electronics. Inc. All right reserved.
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2. PERFORMANCE
BL42K Product SPEC
7
SMS Over GPRS Yes
EMS Melody / Picture
Send / Receive / Save
Yes
Receive only
MMS MPEG4
Send / Receive / Save
Yes
Yes
Long Message MAX 1000 Characters SMS 7pages
Cell Broadcast Yes
Download Over the WAP
Game Yes
Calendar Yes
Memo 100
World Clock Yes
Unit Convert Currency/Surface/Length/Volume/W
eight/Temperature/Velocity
Stop Watch Yes
Wall Paper Yes
WAP Browser Over WAP 2.0 Obigo
Download Melody /
Wallpaper
Yes Over WAP
SIM Lock Yes Operator Dependent
SIM Toolkit Yes R99
MMS Yes Obigo +LG MMS Client
EONS No
CPHS Yes V4.2
ENS No
Camera Yes 5M AF /
Digital Zoom : x2
JAVA Yes CLDC V1.1 / MIDP V2.1
Download Over WAP
Voice Dial No
IrDa No
Bluetooth Yes BT 2.1+EDR
HFP/HSP/A2DP&AVRCP
/OPP/BPP/PBAP/SPP/DUN/FTP
FM radio Yes
GPRS Yes Class 12
EDGE Yes Class 12
Hold / Retrieve Yes
Conference Call Yes Max. 6
DTMF Yes
Memo pad Yes
TTY No
AMR Yes
SyncML Yes
IM Yes(Only Orange) ORANGE MSN
Email Yes
- 12 -
LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
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2. PERFORMANCE
BL42K Product SPEC
8
2.6 HW SPEC.
1) GSM transceiver specification
Item Specification
Phase Error Rms : 5°
Peak : 20 °
Frequency Error GSM : 0.1 ppm
DCS/PCS : 0.1 ppm
EMC(Radiated Spurious Emission
Disturbance) GSM/DCS : < -28dBm
T
ransmitter Output power and Burst
Timing
GSM : 5dBm – 33dBm ± 3dB
DCS/PCS : 0dBm – 30dBm ± 3dB
Burst Timing <3.69us
Spectrum due to modulation out to
less than 1800kHz offset
200kHz : -36dBm
600kHz : -51dBm/-56dBm
Spectrum due to modulation out to
larger than 1800kHz offset to the
edge of the transmit band
GSM :
1800-3000kHz :< -63dBc(-46dBm)
3000kHz-6000kHz : <-65dBc(-46dBm)
6000kHz < : < -71dBc(-46dBm)
DCS :
1800-3000kHz :< -65dBc(-51dBm)
6000kHz < : < -73dBc(-51dBm)
Spectrum due to switching transient 400kHz : -19dBm/-22dBm(5/0), -23dBm
600kHz : -21dBm/-24dBm(5/0), -26dBm
Reference Sensitivity – TCH/FS Class II(RBER) : -105dBm(2.439%)
Usable receiver input level range 0.012(-15 - -40dBm)
Intermodulation rejection – Speech
channels
± 800kHz, ± 1600kHz
: -98dBm/-96dBm (2.439%)
AM Suppression
TGSM : -31dBm
- DCS : -29dBm
-98dBm/-96dBm (2.439%)
Timing Advance ± 0.5T
- 13 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
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LGE Internal Use Only
2. PERFORMANCE
BL42K Product SPEC
9
2) WCDMA transmitter specification
Item Specification
Transmit Frequency Band1 : 1920 MHz ~ 1980 MHz
Band8 : 880MHz~915MHz
Maximum Output Power +24 dBm / 3.84 MHz, +1 / -3 dB
Frequency Error within ±0.1 PPM
Open Loop Power Control Normal Conditions : within ±9 dB,
Extreme Conditions : within ±12 dB
Minimum Transmit Power < -50 dBm /3.84 MHz
Occupied Bandwidth < 5 MHz at 3.84 Mcps (99% of power)
Adjacent Channel Leakage
Power Ratio (ACLR)
> 33 dB @ ±5 MHz,
> 43 dB @ ±10 MHz
Spurious Emissions
|f-fc| > 12.5 MHz
< -36 dBm / 1 kHz RW @ 9 kHz ≤ f < 150 kHz
< -36 dBm / 10 kHz RW @ 150 KHz ≤ f < 30 MHz
< -36 dBm / 100 kHz RW @ 30 MHz ≤ f < 1 GHz
< -30 dBm / 1 MHz RW @ 1 GHz ≤ f < 12.75 GHz
< -60 dBm / 3.84 MHz RW @ 869 MHz ≤ f ≤ 894 MHz
< -60 dBm / 3.84 MHz RW @ 1930 MHz ≤ f ≤ 1900 MHz
< -60 dBm / 3.84 MHz RW @ 2110 MHz ≤ f ≤ 2155 MHz
< -67 dBm / 100 kHz RW @ 925 MHz ≤ f ≤ 935 MHz
< -79 dBm / 100 kHz RW @ 935 MHz < f ≤ 960 GHz
< -71 dBm / 100 kHz RW @ 1805 MHz ≤ f ≤ 1880 MHz
< -41 dBm / 300 kHz RW @ 1884.5 MHz < f < 1919.6 MHz
Transmit Intermodulation < -31 dBc @ 5 MHz & < -41 dBc @ 10 MHz
when Interference CW Signal Level = -40 dBc
Error Vector Magnitude < 17.5 %, when Pout ≥ -20 dBm
Peak Code Domain Error < -15 dB at Pout t-20 dBm
- 14 -
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Only for training and service purposes
2. PERFORMANCE
BL42K Product SPEC
10
3) WCDMA receiver specification
Item Specification
Receive Frequency Band1 : 2110 ~ 2170 MHz
Band8 : 925~960MHz
Reference Sensitivity Level Band1 : BER < 0.001 when Îor = -106.7 dBm / 3.84 MHz
Band8 : BER < 0.001 when Îor = -103.7 dBm / 3.84 MHz
Maximum Input Level BER < 0.001 when Îor = -25 dBm / 3.84 MHz
Adjacent Channel Selectivity
(ACS)
ACS > 33 dB where BER < 0.001 when
Îor = -92.7 dBm / 3.84 MHz
& Ioac = –52 dBm / 3.84 MHz @ ±5 MHz
Blocking Characteristic BER < 0.001 when Îor = -103.7 dBm / 3.84 MHz
& Iblocking = -56 dBm / 3.84 MHz @ Fuw(offset) = ±10 MHz
or Iblocking = -44 dBm / 3.84 MHz @ Fuw(offset) = ±15 MHz
Spurious Response BER < 0.001 when Îor = -103.7 dBm / 3.84 MHz
& Iblocking = -44 dBm
Intermodulation BER < 0.001 when Îor= -103.7 dBm / 3.84 MHz
& Iouw1 = -46 dBm @ Fuw1(offset) = ±10 MHz
& Iouw2 = -46 dBm / 3.84 MHz @ Fuw2(offset) = ±20 MHz
Spurious Emissions < -57 dBm / 100 kHz BW @ 9 kHz ≤ f < 1 GHz
< -47 dBm / 1 MHz BW @ 1 GHz ≤ f ≤ 12.75 GHz
Inner Loop Power Control
In Uplink
Adjust output(TPC command)
cmd 1dB 2dB 3dB
+1 +0.5/1.5 +1/3 +1.5/4
0 -0.5/+0.5 -0.5/+0.5 -0.5/+0.5
-1 -0.5/-1.5 -1/-3 -1.5/-4
group(10equal command group)
+1 +8/+12 +16/+24
- 15 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
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LGE Internal Use Only
2. PERFORMANCE
BL42K Product SPEC
11
4) HSDPA transmitter specification
Item Specification
Transmit Frequency Band1 : 1920 MHz ~ 1980 MHz
Band8 : 880MHz~915 MHz
Maximum Output Power Sub-Test
1=1/15, 2=12/15 21~25dBm / 3.84 MHz
3=13/15 4=15/8 20~25dBm / 3.84 MHz
5=15/7 6=15/0 19~25dBm / 3.84 MHz
HS-DPCCH
Sub-test
in table
C.10.1.4
Power
step
Power step slot
boundary
Power
step size,
P [dB]
Transmitter power
step tolerance [dB]
1 Start of
Ack/Nack
6 +/- 2.3
2 Start of CQI 1 +/- 0.6
5
3 Middle of CQI 0 +/- 0.6
Spectrum Emission Mask
Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0
Frequency offset
from carrier f Minimum requirement Measurement
Bandwidth
2.5 ~ 3.5 MHz -35-15×(f-2.5)dBc 30 kHz
3.5 ~ 7.5 MHz -35-1×(f-3.5)dBc 1 MHz
7.5 ~ 8.5 MHz -35-10×(f-7.5)dBc 1 MHz
8.5 ~ 12.5 MHz -49dBc 1 MHz
Adjacent Channel Leakage
Power Ratio (ACLR)
Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0
> 33 dB @ ±5 MHz
> 43 dB @ ±10 MHz
Error Vector Magnitude < 17.5 %, when Pout ≥ -20 dBm
5) HSDPA receiver specification
Item Specification
Receive Frequency
Band1 : 2110 ~ 2170 MHz
Band8 : 925 ~ 960Hz
Maximum Input Level
(BLER or R), 16QAM Only
Sub-Test : 1=1/15, 2=12/15, 3=13/15, 4=15/8, 5=15/7, 6=15/0
BLER < 10% or R >= 700kbps
- 16 -
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3. Technical Brief
3. TECHNICAL BRIEF
BL42K
G
GY
3. TECHNICAL BRIEF
3.1. GENERAL DESCRIPTION
The RF platform of BL42K supports two different communication modes (WCDMA/GSM modes) including
five communication bands (W2100/W850/GSM900/GSM1800/GSM190). The all the RF blocks can be divided
into three main parts, which are a WCDMA part, a GSM, and an antenna switch Mode.
The simplifed block diagram is shown in Figure 1.1.1i
[Figure 1-1] Block diagram of RF part
- 17 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
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LGE Internal Use Only
3. Technical Brief
BL20
G
GZ
3.3 3.2 GSM MODE
The EDGE/GPRS/GSM transceiver use a digital interface that is shared between receive and transmit data.
The receive interface is based on I and Q data and the transmitter interface is based on envelop and
frequency data.
The quad band EDGE/GSM/GPRS transceiver has the following general features:
Power class
GMSK low bands: Class 4 (33 dBm)
GMSK high bands: Class 1 (30 dBm)
8PSK low bands: Class E2 (27 dBm)
8PSK high bands: Class E2 (26 dBm)
Multi slot class 12 (4+4=5)
Dual Transfer Mode (DTM) class 9 (3+2=5)
Zero-IF receiver
-Polar modulation transmitter
3.2.1 GSM RECEIVER
There are two recommended GSM receiver path configurations; bothare shown in Figure 1.3.2.1. The
configuration shown on top allows the GSM 850 and GSM 1900 bands to share the UMTS 850 and UMTS 1900
paths for US applications and uses four LNA inputs to support quad-band GSM operation.
The lower example uses two LNAsfor quad-band GSM operation (one low band and one high
band), with two-way SAW filters between the antenna switch and the QSC inputs for each
band type.
BL20
G
GZ
3.3 3.2 GSM MODE
The EDGE/GPRS/GSM transceiver use a digital interface that is shared between receive and transmit data.
The receive interface is based on I and Q data and the transmitter interface is based on envelop and
frequency data.
The quad band EDGE/GSM/GPRS transceiver has the following general features:
Power class
GMSK low bands: Class 4 (33 dBm)
GMSK high bands: Class 1 (30 dBm)
8PSK low bands: Class E2 (27 dBm)
8PSK high bands: Class E2 (26 dBm)
Multi slot class 12 (4+4=5)
Dual Transfer Mode (DTM) class 9 (3+2=5)
Zero-IF receiver
-Polar modulation transmitter
3.2.1 GSM RECEIVER
There are two recommended GSM receiver path configurations; bothare shown in Figure 1.3.2.1. The
configuration shown on top allows the GSM 850 and GSM 1900 bands to share the UMTS 850 and UMTS 1900
paths for US applications and uses four LNA inputs to support quad-band GSM operation.
The lower example uses two LNAsfor quad-band GSM operation (one low band and one high
band), with two-way SAW filters between the antenna switch and the QSC inputs for each
band type.
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3. Technical Brief
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[Figure 1-2] QSC GSM receiver signal paths functional diagram
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3.2.2 GSM TRANSMITTER
The QSC62x0 device supports quad-band GSM transmissions with two separate dual-band
driver amplifer outputs; in fact, most Tx active circuits are contained within the device.
Both GSM transmit paths (Figure 1.3.1.1) begin with a single, shared analog baseband
signal from the device’s baseband circuits - the same interface and baseband circuits used
by the UMTS transmitters. The GSM transmitters use the same quadrature upconvertersas well
-one for low band signals and one for high band —with just one active at a time. The
transmiter LO signals are generated by circuits described.
in next section and delivered to the upconvertercircuits at the correct frequency, with
the proper phase relationship, and with an adequate drive level.
The SPDT switches at each driver amplifier input allow selectionof the output signal:
either the actual GSM signal from the upconverteror a test signal generated by the Tx LO
synthesizer. The Tx output chain is functionally identical for both the low band and the
high band: the power amplifer is driven by the QSC device through a matching network
and a resistive attenuator; the PA output is routed to the antenna switch module whose
output is connected to the antenna. In addition to the through signal path, the QSC device
also provides the PA ramp control signal that ensures smooth transitions while the
transmitter is turned on and off for GSM’sburst transmissions.
The ramp signal is generated by one of the baseband circuit’s Tx DACs. A switch after
the baseband amplifer selects whether the DAC output signal is routed to GSM PA
module for ramping the PA up or down, or to the transmitter signal path fo
transmission.
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3. Technical Brief
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[Figure 1.2.2] QSC GSM transmitter signal paths functional diagram
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3.3 UMTS MODE
The W-CDMA transceiver uses differential analog in-phase and quadrature-phase interfaces,
That is an IQ-interface, both in the receiver and transmitter information path..
The transceiver has the following general features:
. Power class : Power class 3 (+24dBm) in Band II and V
. Zero-IF Receiver.NoIF filter needed
. Direct IQ modulation transmitter
[Figure 1.3.1] WCDMA RF structure
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