LG KG270 User manual
Date: April, 2007 / Issue 1.0
Service Manual Model : KG270/MG160
Service Manual
KG270/MG160
Internal Use Only
KG270_cover(6)_0404 1904.1.1 1:19 AM ˘`1
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1. INTRODUCTION ...............................5
1.1 Purpose .................................................. 5
1.2 Regulatory Information............................ 5
2. PERFORMANCE...............................7
2.1 H/W Features...........................................7
2.2 S/W Features...........................................8
3. TECHNICAL BRIEF ........................14
3.1 Digital Main Processor(PMB7880).........14
3.2 Power Amplifier Module (SKY77318) ....22
3.3 26 MHz Clock (DCXO)...........................24
3.4 RTC(32.768KHz Crystal) .......................25
3.5 LCD Interface(3-wire SPI interface).......26
3.6 SIM Card Interface.................................28
3.7 KEYPAD Interface .................................29
3.8 Battery Charging Block Interface ...........30
3.9 RF Interface ...........................................31
3.10 Audio Interface.....................................33
3.11 Key LED Interface................................37
3.12 Vibrator Interface .................................38
3.13 Memory Interface.................................39
3.14 Power Block Interface..........................40
3.15 FM Radio Interface ..............................42
4. TROUBLE SHOOTING ...................44
4.1 RF Trouble.............................................44
4.2 TX Trouble .............................................50
4.3 Power On Trouble..................................54
4.4 SIM Card Trouble...................................56
4.5 Vibrator Trouble .....................................58
4.6 Keypad Trouble......................................60
4.7 RTC Trouble ..........................................62
4.8. Key backlight Trouble ...........................64
4.9. LCD Trouble..........................................66
4.10. Microphone Trouble............................69
4.11. Receiver Trouble.................................71
4.12 Speaker Trouble ..................................73
4.13 Headphone Trouble .............................75
4.14 Charging Trouble .................................77
4.15 FM Radio Trouble ................................79
5. DOWNLOAD.......................................82
5.1 Download Setup.....................................82
5.2 Download Process.................................83
6. BLOCK DIAGRAM ..........................88
7. Circuit Diagram ..............................89
8. PCB LAYOUT..................................93
9. ENGINEERING MODE ....................95
9.1 About Engineering Mode .......................95
9.2 Access Codes........................................95
9.3 Key Operation........................................95
9.4 Engineering Mode Menu Tree ...............95
10. CALIBRATION ..............................92
10.1 Test Equipment Setup .........................92
10.2 Calibration Steps..................................92
11. STAND ALONE TEST .................109
11.1 Test Program Setting.........................109
11.2 Tx Test...............................................111
11.3 RX Test..............................................112
12. EXPLODED VIEW &
REPLACEMENT PART LIST ..... 113
12.1 Exploded View .................................. 113
12.2 Replacement Parts ............................115
12.3 Accessory ......................................... 124
Table Of Contents
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 4 -
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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1. INTRODUCTION
1.1 Purpose
This manual provides the information necessary to repair, 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 this phone or compatibility with the
network, 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 this model must be performed only by the manufacturer or its authorized
agent. The user may not make any changes and/or repairs expect as specifically noted in this manual.
Therefore, note that unauthorized alternations or repair may affect the regulatory status of the system
and may void any remaining warranty.
1. INTRODUCTION
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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1. INTRODUCTION
E. Notice of Radiated Emissions
This model complies with rules regarding radiation and radio frequency emission as defined by local
regulatory agencies. In accordance with these agencies, you may be required to provide information
such as the following to the end user.
F. Pictures
The pictures in this manual are for illustrative purposes only; your actual hardware may look slightly
different.
G. Interference and Attenuation
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.
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 7 -
2. PERFORMANCE
2.1 H/W Features
2. PERFORMANCE
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Item Specifications
Band GSM DUAL Band(900/1800)
Type Bar type
Dimension 98 * 45 * 12.9mm
Weight 60g
Battery 750mAh Li-ion
Talk Time Over 2hours @EGSM,TX Level : 5
Stand-by Time Over 200 hours @Paging period : 5
RTC Under 4 hours when removed battery.
Antenna Internal Type(Dual-band)
LCD(Main) 1.52"(128x128 pixels), 65K Color STN LCD
Back Light Yes
Back Light color Blue
Vibrator Yes
Speaker&Receiver Yes(11x07 Receiver, 16®™ Speaker)
C-MIC Yes
Earphone Jack Mono or Stereo(Optional)
SIM Yes(Plug in Type) : 3.0V
MIDI 16 poly
I/O Connect 18 Pins (included Earphone Jack)
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2.2 S/W Features
Function Detail Item Specification Etc.
Operating System OS O OSE
Data Circuit O
Packet X
Connectivity Infrared (IrDA) X
Bluetooth X
USB X
USB Mass storage X
RS232 O
Voice Function Voice Recording X
Voice Command X
Answering machine X
Memory User Memory O TBD Under 300KB
XMMS
XPictures (Still Image &
Moving Image)
XMP3 (Music Contents)
XJava Contents
OWallpaper 3 bitmap images
ORingtone 10 MIDI Ringtones
Xexternal memory (microSD)
Camera Camera Module X
Audio Voice Codec O FR, HR, EFR, AMR-NB
AMR O
FM Radio O
Integrated handsfree speaker O Speaker phone mode
2. PERFORMANCE
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LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Function Detail Item Specification Etc.
Display RSSI O 6 level
Battery Level O 5 level
RTC O
Multi?Language O Basic:English
Max. 4 language of Latin
2 or 3 language of etc.
Quick Access Mode X
PLMN/Service Indicator O
Dimming Clock X
Dual Clock X
Local Time / Selected Area Time
Normal Features Last Dialed Number O 10
Last Received Number O 10
Last Missed Number O 10
Scratch Pad Memory X
Call Call Waiting O
Manage-ment Call Swap O
Call Retrieve O
Auto Answer X
Automatic Redial O
Calling Line dentification O
Full Call divert O
Speed Dialing O
Last Number Redial O
Multi-party Call (Conference Call)
O
Explicit Call Transfer X
2. PERFORMANCE
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LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
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Function Detail Item Specification Etc.
Network Automatic Network Selection O
Manual Network Selection O
Network Service Status O
DTMF DTMF Signaling O
DTMF Enable & Disable O
Audio Key Tone Volume O 6 Level (Include Mute)
Ring Tone Volume O 6 Level (Include Mute)
Ring Tone Pattern O 10Type(fixed)
Ring Type Silent O Vibrator & Ring (Indicator)
Earpiece Volume O
6 Level (Include Mute)
Mute O
Cell Broadcast Read Cell Broadcast O
Cell Broadcast Categories O
Cell Broadcast Message O
Language
Phone Book Entry O 300
Field O Office,Mobile
Numeric Store and Recall O
Alphabetic Store O
Alphabetic Recall O
Scroll by alphabetic or O
numeric order
Last Number Dialed
O10
Last Number Missed O 10
Last Number Received O 10
Copy & Move O
Fixed Dial Number O
Barred Dial Number X
Service Dial Number O
Email Entry X
Picture ID X
Video Caller ID X
My Name card X
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. PERFORMANCE
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Function Detail Item Specification Etc.
Supp. Services Call Forwarding O All Incoming Calls,
ONo Reply
OOn Busy,
ONot reachable
Call Barring O All Outgoing Calls,
OInternational Calls,
OCalls except to Home Country
incoming Calls,
O
All incoming Calls when roaming
Conference Call O up to 3 calls
SIM Plug?In Type O 3 V only
SIM Lock O Service Provider / Network Lock
SIM Toolkit O Class 1, 2, 3
Prepaid SIM Operation O
Mega SIM X
Short Messaging Read Message O
Manage-ment Write and Edit Message O Not Support EMS
Send and Receive Message O
Reply to Message O
Forward Message
Extract Number from Message O
Message Status O
Message Unread Indicator O
Settable Message Center Number,
O
Reply Path and Validity O
Visible and Audible Message O
Receive Alerting
Voice Mail O
Settable Voice Mail Center Number
O
Message Protocol ONormal, Fax, National Paging,
Email, X400, ERMES, Voice
Message Overflow Indicator O
Message Center Number O
Help Menu X
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