Service Manuals, User Guides, Schematic Diagrams or docs for : LG Mobile Phone LG C2500 LG C2500 1
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Service Manual
Service Manual
C2500
Model : C2500
Date: February, 2006 / Issue 1.0
Service Manual Personal Cellular Telephone
C2500
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.
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.
CONTENTS
1. INTRODUCTION.......................................5 5. TECHNICAL SPECIFICATION ...............30
1.1 Purpose of the Manual ................................... 5 5.1 TX Characteristics..........................................30
1.2 Structure of the Manual....................................5 5.1.1. Frequency Error......................................30
1.3 Servicing Responsibilities ................................5 5.1.2. Modulation Phase Error ..........................30
5.1.3. Output RF Spectrum due to Modulation .30
2. LEVEL 2.5 SERVICE GUIDELINES .........6 5.1.4. Output RF Spectrum due to Switching
2.1 Introduction ......................................................6 Transients ...............................................30
2.2 Level of Repair Guidelines ...............................6 5.1.5. Spurious Emissions at Antenna
Connector ...............................................31
2.3 Level of Repair Service Tools and Interfaces ..9
5.1.6. Residual Peak Power .............................33
2.4 Features ...........................................................9
5.2 Rx Characteristics ..........................................34
2.5 Mobile Unit Basic Kit ......................................10
5.2.1. Sensitivity................................................34
3. OPERATING INSTRUCTIONS ...............11
6. Calibration .............................................37
3.1 General ..........................................................11
3.2 Liquid Crystal Display.....................................11
7. BLOCK DIAGRAM .................................44
3.3 Location of Controls .......................................13
7.1 C2500 Base band Hardware Typical application
3.4 Alpha Entry.....................................................14
and Block Diagram.........................................44
3.4.1. Character Set / Key Assignments...........14
7.2 C2500 RF Block Diagram ..............................46
3.5 Public Man Machine Interface (MMI) .............16
3.5.1. Reading the Phonebook
8. C2500 PCB PLACEMENT......................47
Memory Location ....................................16
3.5.2. Features for Factory Service ..................16
3.5.3. Tips for Call Option .................................18
9. CIRCUIT DIAGRAM ...............................49
3.6 Security Procedure.........................................18
3.7 Troubleshooting .............................................19 10. REPLACEMENT PART LIST................57
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
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
-3-
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.
-4-
1. INTRODUCTION
1. INTRODUCTION
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.
-5-
2. LEVEL 2 SERVICE GUIDELINES
2. LEVEL 2 SERVICE GUIDELINES
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.
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
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
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
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.
-6-
2. LEVEL 2 SERVICE GUIDELINES
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 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
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