LG C2500 Manuale utente
Service Manual Model : C2500
Date: February, 2006 / Issue 1.0
Service Manual
C2500
Service Manual
Personal Cellular Telephone
C2500
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.
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a
product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any
attempt to service or repair the product or products dealt with in thes service information by anyone else could result in
serious injury or death.
1. INTRODUCTION.......................................5
1.1 Purpose of the Manual ................................... 5
1.2 Structure of the Manual....................................5
1.3 Servicing Responsibilities ................................5
2. LEVEL 2.5 SERVICE GUIDELINES.........6
2.1 Introduction ......................................................6
2.2 Level of Repair Guidelines...............................6
2.3 Level of Repair Service Tools and Interfaces ..9
2.4 Features...........................................................9
2.5 Mobile Unit Basic Kit ......................................10
3. OPERATING INSTRUCTIONS ...............11
3.1 General ..........................................................11
3.2 Liquid Crystal Display.....................................11
3.3 Location of Controls .......................................13
3.4 Alpha Entry.....................................................14
3.4.1. Character Set / Key Assignments...........14
3.5 Public Man Machine Interface (MMI) .............16
3.5.1. Reading the Phonebook
Memory Location ....................................16
3.5.2. Features for Factory Service ..................16
3.5.3. Tips for Call Option.................................18
3.6 Security Procedure.........................................18
3.7 Troubleshooting .............................................19
4. ASSEMBLY INSTRUCTIONS.................20
4.1 Assembly Structure........................................20
4.2 Antenna sub assembly...................................21
4.3 PCB sub assembly.........................................22
4.4 Top case sub assembly .................................25
4.5 Bottom case sub assembly ............................25
4.6 Main assembly ...............................................27
5. TECHNICAL SPECIFICATION ...............30
5.1 TX Characteristics..........................................30
5.1.1. Frequency Error......................................30
5.1.2. Modulation Phase Error..........................30
5.1.3. Output RF Spectrum due to Modulation .30
5.1.4. Output RF Spectrum due to Switching
Transients ...............................................30
5.1.5. Spurious Emissions at Antenna
Connector ...............................................31
5.1.6. Residual Peak Power .............................33
5.2 Rx Characteristics..........................................34
5.2.1. Sensitivity................................................34
6. Calibration .............................................37
7. BLOCK DIAGRAM .................................44
7.1 C2500 Base band Hardware Typical application
and Block Diagram.........................................44
7.2 C2500 RF Block Diagram ..............................46
8. C2500 PCB PLACEMENT......................47
9. CIRCUIT DIAGRAM ...............................49
10. REPLACEMENT PART LIST................57
CONTENTS
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IMPORTANT
This document is intended for use by qualified service personnel only.
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.
1. INTRODUCTION
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1.1. Purpose of the Manual
This service manual contains the information and procedures required for instilling, 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.
1. INTRODUCTION
2. LEVEL 2 SERVICE GUIDELINES
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2.1. Introduction
The document is intended to help you carry out repair up to Level 2 on the C2500 mobile phone.
The repair for International version and Asian variants are identical unless otherwise noted, therefore
the description herein is confined to C2500 only.
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
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.
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.
2. LEVEL 2 SERVICE GUIDELINES
All repairs have to be carried out in an environment set up
according to ESD regulations defined in international standards.
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
DARTS P/N Description SVC Level LG P/N
2284-1870-6000 Swap Unit Complete, C2500 L0
2. LEVEL 2 SERVICE GUIDELINES
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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.
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.
DARTS P/N Description SVC Level LG P/N
2207-0030-0003 Vibrator 3V L1 SJMY0007009
228S-2187-0010 BOTTOM CASE Ass'y Silver L1 ACGM0071701
221C-BA03-0102 Battery connector Pitch=2.5mm 3Pin PA08303 L1 ENZY0018701
2285-3187-0000 Antenna Ass'y ( w Louder SPK) L1 SNGF0013601
2206-1110-0001 Receiver Panasonic - EASG1D501E2 L1 SURY0009301
228S-1187-0000 TOP CASE Ass'y LG Silver ( w LENS) L1 ACGK0073101
2211-DP18-1100 Deco. Plate for Side-L L1 MDAC0017601
2211-DP18-2100 Deco. Plate for Side-R L1 MDAC0017701
2211-SE18-0100 SIDEKEY 1 WAY L1 MBJL0032901
2211-SE18-1100 SIDEKEY 2 WAY L1 MBJN0008401
2218-1800-6280 Keypad RUS Silver L1 ABGA0006901
2212-DM18-0000 Metal dome L1 ADCA0051201
2206-5030-0083 MIC. FPT-22718-3 L1 SUMY0005604
2211-BA18-0100 Battery Cover LG L1 MCJA0032301
2213-TR18-0100 RF_SW_CAP rubber Grey L1 MCCF0035601
2214-MF13-3Z80 Screw (M1.6*3.8)°AZN°AWhite L1 GMZZ0020401
2213-TR18-1100 PHONE JACK CAP L1 MCCC0036001
2213-TR18-2100 USB CAP L1 MCCE0029101
225N-TM03-3280 SENSOR VGA TM03-E1-X10 L1
2. LEVEL 2 SERVICE GUIDELINES
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Level 2 Part No.
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.
Level 2.5 Part No.
DARTS P/N Description SVC Level LG P/N
2218-18B5-0080 PCB Main Board, C2500 L2 SAFY0159101
ONLY THE QUALIFIED PERSONNEL SHALL BE LIABLE TO
PERFORM THIS LEVEL OF REPAIRS UNDER THE SUPERVISION
AND APPROVAL OF DARTS TECHNICAL TRAINER.
DARTS P/N Description SVC Level LG P/N
2221-1341-0082 LCM STN 128x128dot 26P LKC34TML8Y L2.5 SVLY0027001
220B-0010-0000
BACKUP BATT D4.8Xh1.4mm 0.06F XC414-II06
L2.5 SBCL0001003
220S-1020-0081 SIDE KEY 20MA/12V 6P L2.5 ESCY0004301
220S-2010-0081
RF TEST SWITCH 6000MHz 2W 50 OHM MS156
L2.5 ENWY0004101
2212-BC18-0000 BASE BAND COVER FOR ARI L2.5 MCBA0011201
2212-BF18-0000 BASE BAND FRAME FOR ARI L2.5 MCBA0011202
2212-RC18-0000 RF COVER FOR ARI L2.5 MCBA0011301
2212-RF18-0000 RF FRAME FOR ARI L2.5 MCBA0011302
221C-SC06-0182
SIM CARD CONN PITCH=2.54mm 6P 217-010-60 L2.5 ENSY0017201
221C-SP02-0186
SPEK CONN P=3mm 2P CBE-2809-2258H POGOPI
L2.5 ENZY0018401
221C-PG01-0181 POGO PIN 1P CDR-5815-2961 L2.5 ENZY0018501
221J-EP06-0988 EARPHONE JACK 6P L2.5 ENJE0005101
221C-IN05-0185 MINI USB CONN 5P US25R05-SBP L2.5 ENRY0006201
2265-3010-0582 LED R G B HT-372FCH-DT L2.5 EDLS0001001
221C-sk20-0186 Socket 20p CLE9020-0102F L2.5 ENSY0017301
2. LEVEL 2 SERVICE GUIDELINES
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2.3. Level of Repair Service Tools and Interfaces
This section provides an overview of the necessary equipments and tools to conduct the specified
levels of repair job accordingly.
The service interface is used for the purpose of communicating with the mobile unit in situation such
as software upgrading and testing process. These service interfaces are listed below:
2.4. Features
The LG Telephone Model C2500 is a high performance small, light handset for business and domestic
use. The following features are provided:
1. Triple Codec which includes Half Rate / Full Rate and Enhanced Full Rate (EFR) speech codec.
2. Tri Band E-GSM900 and DCS1800 operation.
3. GPRS Service.
4. T9 Text Entry.
Level of Repairs Tools & Equipments DARTS P/N LG P/N
0Not required
1
ESD Strap, Tweezer, Power Drill, Air blower,
Flux remover, Disassembly tool, Digital Multimeter
2ESD Strap
As in Level 1 with additional equipment: Soldering and
2.5 desoldering station, Flux paste, Solder wick, Solder lead,
C2500 soldering jigs, CTS 55 GSM Tester, C2500 Testing
jigs, Power supply
DO NOT INTEND TO REMOVE ANY ACTIVE COMPONENTS AS
THIS WILL CAUSE THE MAIN BOARDS TO MALFUNCTION AND
BEYOND THE REPAIR BOUNDARIES
DARTS P/N Description SVC Level LG P/N
RF Cable L2.5
SW D/L cable : ALL
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