LG KG190 User manual

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KG190
Version: 1B
Every care has been taken to ensure that contents of this service manual give an accurate representation
of the equipment. However, DARTS TECHNOLOGIES CORP. accepts no responsibility for inaccuracies
which may occur and reserves the right to make changes to the design without prior notice.

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CONTENTS
1. INTRODUCTION
1.1 Purpose of the Manual
1.2 Structure of the Manual
1.3 Servicing Responsibilities
2. LEVEL 2.5 SERVICE GUIDELINES
2.1 Introduction
2.2 Level of Repair Guidelines
2.3 Level of Repair Service Tools and Interfaces
2.4 Features
2.5 Mobile Unit Basic Kit
3. OPERATING INSTRUCTIONS
3.1 General
3.2 Liquid Crystal Display
3.3 Location of Controls
3.4 Alpha Entry
3.4.1. Character Set / Key Assignments
3.5 Public Man Machine Interface (MMI)
3.5.1. Reading the Phonebook Memory Location
3.5.2. Features for Factory Service
3.5.3. Tips for Call Option
3.6 Security Procedure
3.7 Troubleshooting
4. ASSEMBLY INSTRUCTIONS
4.1 Assembly Structure
4.2 Antenna sub assembly
4.2.1. Appendix 1 Speaker module sub assembly
4.3 PCB sub assembly
4.4 Top case sub assembly
4.5 Bottom case sub assembly
4.6 Main assembly

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5. TECHNICAL SPECIFICATION
5.1 TX Characteristics
5.1.1. Frequency Error
5.1.2. Modulation Phase Error
5.1.3. Output RF Spectrum due to Modulation
5.1.4. Output RF Spectrum due to Switching Transients
5.1.5. Spurious Emissions at Antenna Connector
5.1.6. Residual Peak Power
5.2 Rx Characteristics
5.2.1. Sensitivity
6. BLOCK DIAGRAM
6.1 KG190 Base band Hardware Typical application and Block Diagram
6.2 KG190 RF Block Diagram
7. KG190 PCB PLACEMENT
8. CIRCUIT DIAGRAM
9. SPPL list

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IMPORTANT
This document is intended for use by qualified service personnel only.
Company Policy
Our policy is of continuous development; details of all technical modifications will be included with service
bulletins.
While every endeavor has been made to ensure the accuracy of this document, some errors may exist. If any
errors are found by the reader, please notified it to company

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Warnings and Cautions
Please refer to the phone’s user guide for instructions relating to operation, care and
maintenance including important safety information. Note also the following:
Warnings:
1. CARE MUST BE TAKEN ON INSTALLATION IN VEHICLES FITTED WITH ELECTRONIC ENGINE
MANAGEMENT SYSTEMS AND ANTI–SKID BRAKING SYSTEMS. UNDER CERTAIN FAULT
CONDITIONS, EMITTED RF ENERGY CAN AFFECT THEIR OPERATION. IF NECESSARY,
CONSULT THE VEHICLE DEALER/MANUFACTURER TO DETERMINE THE
IMMUNITY OF VEHICLE ELECTRONIC SYSTEMS TO RFENERGY.
2. THE HANDPORTABLE TELEPHONE MUST NOT BE OPERATED
IN AREAS LIKELY TO CONTAIN POTENTIALLY EXPLOSIVE ATMOSPHERES EG PETROL
STATIONS (SERVICE STATIONS), BLASTING AREAS ETC.
3. OPERATION OF ANY RADIO TRANSMITTING EQUIPMENT, INCLUDING CELLULAR
TELEPHONES, MAY INTERFERE WITH THE FUNCTIONALITY OF INADEQUATELY PROTECTED
MEDICAL DEVICES. CONSULT A PHYSICIAN OR THE MANUFACTURER OF THE MEDICAL
DEVICE IF YOU HAVE ANY QUESTIONS. OTHER ELECTRONIC EQUIPMENT MAY
ALSO BE SUBJECT TO INTERFERENCE.
Cautions:
1. Servicing and alignment must be undertaken by qualified personnel only.
2. Ensure all work is carried out at an anti–static workstation and that an anti–static wrist strap
is worn.
3. Ensure solder, wire, or foreign matter does not enter the telephone as damage may result.
4. Use only approved components as specified in the parts list.
5. Ensure all components, modules screws and insulators are correctly re–fitted after servicing
and alignment. Ensure all cables and wires are repositioned correctly.

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1. INTRODUCTION
1.1. Purpose of the Manual
This service manual contains the information and procedures required for installing, operating and servicing
the LG GSM Personal Cellular Mobile Telephone system operating on GSM Digital Cellular Networks.
1.2. Structure of the manual
The manual is structured to provide service engineering personnel with the following information and
procedures:
1. General and technical information – provides a basic understanding of the equipment, kits and options,
together with detailed information for each of the major component parts.
2. Installation and operating information – provides instructions for unpacking, installing and operating the
equipment.
3. Servicing information – provides complete instructions for testing, disassembly, and reassembly of the
product. Step-by-step troubleshooting information is given to enable the isolation and identification of a
malfunction, and thus determine what corrective action should be taken. The test information enable
verification of the integrity of the equipment after any remedial action has been carried out.
4. Illustrated parts list – provides to enable the identification of all cosmetic and some electrical components,
for the ordering of replacement parts.
1.3. Servicing Responsibilities
The procedures described in this manual must performed by qualified service engineering personnel, at an
authorized service center.
The service engineering personnel are responsible for fault diagnosis and repair of all equipment described in
this manual.

2. LEVEL 2 SERVICE GUIDELINES
2.1. Introduction
The document is intended to help you carry out repair up to Level 2 on the KG190 mobile phone.
The repair for International version and Asian variants are identical unless otherwise noted, therefore the
description herein is confined to KG190 only.
All repairs have to be carried out in an environment set up according to ESD
regulations defined in international standards.
2.2. Level of Repair Guidelines
The following description provides an outline of the level of repairs that could be determined at customers’
premises. The level of repairs are highly dependent on the customer’s resource and capabilities and are
approved by
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Please abide by your service contract agreements in determining the level of
repairs that you are capable of conducting.
Only qualified personnel shall perform all the related repair procedures based on
the service contract
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2.2.1. Level 0
This level DO NOT involved any kinds of repair or disassembly of the mobile unit. The customer ONLY
needs to identify the fault occurred and send back the faulty units with the fault report to DARTS Mobile
Service Center
The inventory swap units are available for order.
Level 0 Part No.
DARTS P/N Description SVC Level LG P/N
2284-1870-6000 Swap Unit Complete, C2500 L0

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2.2.2. Level 1
This level requires the repair or disassembly of the mobile unit up to a certain specified criteria. This level
might requires a specific tools in conducting the Level 1 repair job. All components attached to the upper
and lower casings are replaceable. DO NOT remove any components on the PCB board.
If the repaired units still DO NOT function properly, customer needs to attach the fault report together
with the units complete with housings and send back to DARTS Mobile Service Center for further
investigations.
The components listed below are intended for Level 1 repair spares only.
Level 1 Part No.
DARTS P/N Description SVC Level LG P/N
2207-0030-0003 Vibrator 3V L1
2285-2187-0000 BOTTOM CASE Ass'y Silver L1
221C-BA03-0102 Battery connector Pitch=2.5mm 3Pin PA08303 L1
2285-3224-0000 Antenna Ass'y ( w Louder SPK) L1
2206-1110-0001 Receiver Panasonic - EASG1D501E2 L1
2285-1187-A000 TOP CASE Ass'y LG Silver ( w LENS) L1
2211-DP18-1100 Deco. Plate for Side-L L1
2211-DP18-2100 Deco. Plate for Side-R L1
2211-SE18-0100 SIDEKEY 1 WAY L1
2211-SE18-1100 SIDEKEY 2 WAY L1
2218-1800-A100 Keypad RUS Silver L1
2212-DM18-0000 Metal dome L1
2206-5080-0002 MIC. FPT-22718-3 L1
2211-BA18-0100 Battery Cover LG L1
2213-TR18-0100 RF_SW_CAP rubber Grey L1
2214-MF13-3Z80 Screw (M1.6*3.8)，ZN，White L1
2213-TR18-1100 PHONE JACK CAP L1
2213-TR18-2100 USB CAP L1
225n-TM03-3080 SENSOR VGA TM03-E1-X10 L1

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2.2.3. Level 2
This level of repair requires the exchange of the mobile unit main board. There will be non-removal of any
components on the faulty main board. The exchanged faulty main boards shall be properly packed in a plastic
bulk with the attached IMEI label and fault report and send back to DARTS Mobile Service Center for detailed
repairs.
Level 2 Part No.
DARTS P/N Description SVC Level LG P/N
2281-1831-0000 PCB Main Board, ARX L2

2.2.4. Level 2.5
This level requires the repair or removal of certain specified discrete components of the mobile units’
main board. This level of repair might requires a specific tools and soldering equipments with proper
soldering jigs in conducting the repair job.
ONLY THE QUALIFIED PERSONNEL SHALL BE LIABLE TO
PERFORM THIS LEVEL OF REPAIRS UNDER THE SUPERVISION
AND APPROVAL OF DARTS TECHNICAL TRAINER.
Level 2.5 Part No.
DARTS P/N Description SVC Level LG P/N
2221-1261-0002 LCM STN 128x128dot 26P LKC34TML8Y L2.5
220B-0010-0000 BACKUP BATT D4.8Xh1.4mm 0.06F XC414-II06 L2.5
220S-1020-0081 SIDE KEY 20MA/12V 6P L2.5
220S-2010-0081 RF TEST SWITCH 6000MHz 2W 50 OHM MS156 L2.5
2212-BC18-0000 BASE BAND COVER FOR ARI L2.5
2212-BF18-0000 BASE BAND FRAME FOR ARI L2.5
2212-RC18-0000 RF COVER FOR ARI L2.5
2212-RF18-0000 RF FRAME FOR ARI L2.5
221C-SC06-0102 SIM CARD CONN PITCH=2.54mm 6P 217-010-60 L2.5
221C-SP02-0186 SPEK CONN P=3mm 2P CBE-2809-2258H POGOPI L2.5
221C-PG01-0181 POGO PIN 1P CDR-5815-2961 L2.5
221J-EP06-0988 EARPHONE JACK 6P L2.5
221J-MU05-0185 MINI USB CONN 5P US25R05-SBP L2.5
2265-0301-0582 LED R G B HT-372FCH-DT L2.5
221C-sk20-0186 Socket 20p CLE9020-0102F L2.5
DO NOT IN
CAUSE T
TEND TO REMOVE ANYACTIVE COMPONENTS AS THIS WILL
HE MAIN BOARDS TO MALFUNCTION AND BEYOND THE
REPAIR BOUNDARIES
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