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LG C2500 Service Manual

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Service Manual
C2500
Date: February, 2006 / Issue 1.0

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Summary of Contents for LG C2500

  • Page 1 Service Manual C2500 Date: February, 2006 / Issue 1.0...
  • Page 2 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.

  • Page 3: Table Of Contents

    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...
  • Page 4 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.

  • Page 5: Warnings And Cautions

    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.

  • Page 6: 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...

  • Page 7: Level 2.5 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.
  • Page 8 Battery connector Pitch=2.5mm 3Pin PA08303 ENZY0018701 2285-3187-0000 Antenna Ass'y ( w Louder SPK) SNGF0013601 2206-1110-0001 Receiver Panasonic - EASG1D501E2 SURY0009301 228S-1187-0000 TOP CASE Ass'y LG Silver ( w LENS) ACGK0073101 2211-DP18-1100 Deco. Plate for Side-L MDAC0017601 2211-DP18-2100 Deco. Plate for Side-R MDAC0017701 2211-SE18-0100...
  • Page 9 Description SVC Level LG P/N 2218-18B5-0080 PCB Main Board, C2500 SAFY0159101 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.

  • Page 10: Level Of Repair Service Tools And Interfaces

    SW D/L cable : 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.

  • Page 11: Mobile Unit Basic Kit

    2. LEVEL 2 SERVICE GUIDELINES 5. Voice Ringer. 6. Wireless Application Protocol (WAP) Browser. 7. Backup Battery. 8. Downloadable polyphonic melody ring tones. 9. Clock, Calculator and Currency Converter. 2.5. Mobile Unit Basic Kit Figure 2.1: Hand portable Main Unit Kit Content Item Description Part Number...

  • Page 12: Operating Instructions

    3. OPERATING INSTRUCTIONS 3. OPERATING INSTRUCTIONS 3.1. General This section provides a brief guide to the operation and facilities available on the telephone handset. Refer to the Operating Instruction supplied with the telephone for full operational information. 3.2. Liquid Crystal Display The telephone handset has a graphical chip on glass display.

  • Page 13: Essential Indicators

    3. OPERATING INSTRUCTIONS Essential indicators Indicates signal strength and alternate line service. Shows handset current battery charge strength. Indicates the phone keypad is locked. Indicates the profiles alert type is Ring Indicates the profiles alert type is vibration. Indicates the profiles alert type is vibration and ring. Indicates the profiles alert type is vibration then ring.

  • Page 14: Location Of Controls

    3. OPERATING INSTRUCTIONS 3.3. Location of Controls Hand-free kit connection Earpiece Adjust Volume Side key Audio Play Display Screen Power on / charging indicator USB connector Microphone Antemma area Speaker Battery Cover Figure 3.2: Location of Controls - 13 -...

  • Page 15: Alpha Entry

    3.4. Alpha Entry 3.4.1. Character Set / Key Assignments There are 20 keys on C2500, including 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, *, #, SEND, END, Left-Soft-Key (LSK), Right-Soft-Key (RSK), 4-way Navigation Key. The following ID drawing is only used for Keypad Layout’s reference.

  • Page 16: Key Function List

    3. OPERATING INSTRUCTIONS ➢ Key Function List λ A. Power/End key. • Switch phone on and off. Also, ends a call or Exit from any function and back to Idle mode. λ B. Selection Key • The function of the keys depends on the text shown on the display above the keys. For example, Menu and Name in Idle mode.

  • Page 17: Public Man Machine Interface (Mmi)

    3. OPERATING INSTRUCTIONS 3.5. Public Man Machine Interface (MMI) 3.5.1. Reading the Phonebook Memory Location # <MEMORY LOCATION> # Leading zeros can be left out of the location number, e.g. 007 can be 7. 3.5.2. Features for Factory Service Features Description By 2945#*# to enter production mode A.
  • Page 18 3. OPERATING INSTRUCTIONS G. Ring tone[7] This menu is to test the Ring tone. H. LED[8] This menu is to test the LED. • Main LCM BL on: Main LCM BL is on. • Main LCM BL off: Main LCM BL is off. •...

  • Page 19: Tips For Call Option

    3. OPERATING INSTRUCTIONS 3.5.3.Tips for Call Option A call can be connected to any single caller by pressing Option key. When user press Option key during active call, user can choose one of those functions from the list: Hold: put a call on. Retrieve: reconnect a holding call.

  • Page 20: Troubleshooting

    3. OPERATING INSTRUCTIONS 3.7. Troubleshooting The user is given the following information and advised to contact the dealer if the problems persist: Problem Cause Remedy Telephone will not Check that the battery pack is fully charged switch on and correctly connected to the telephone. Extremely short battery The network in use and the Avoid areas of poor reception.

  • Page 21: Assembly Instructions

    4. ASSEMBLY INSTRUCTIONS 4. ASSEMBLY INSTRUCTIONS 4.1. Assembly Structure - 20 -...

  • Page 22: Antenna Sub Assembly

    4. ASSEMBLY INSTRUCTIONS 4.2. Antenna Base sub assembly 1. To add cmos rubber on antenna base 2. To add speaker on antenna base 3. To add speaker cover on antenna base - 21 -...

  • Page 23: Pcb Sub Assembly

    4. ASSEMBLY INSTRUCTIONS 4. To add antenna metal plate on Antenna base 5. To add cmos sponge on Antenna base 4.3 PCBA sub assembly 1. To add LCM module on PCBA - 22 -...
  • Page 24 4. ASSEMBLY INSTRUCTIONS 2. To add metal dome on PCBA 3. To add BB shielding cover on PCBA 4.To add RF shielding cover on PCBA - 23 -...
  • Page 25 4. ASSEMBLY INSTRUCTIONS 5.To add CMOS on PCBA 6.To add antenna base on PCBA 7. To add LCM shielding on PCBA - 24 -...

  • Page 26: Top Case Sub Assembly

    4. ASSEMBLY INSTRUCTIONS 4.4 Top case sub assembly 1. To add receiver rubber and receiver on top case 2. To add Keypad on top case 4.5 Bottom case sub assembly 1. To add battery connector on bottom case. - 25 -...
  • Page 27 4. ASSEMBLY INSTRUCTIONS 2. To add vibrator on bottom case. 3. To add Mic rubber and Mic on bottom case. 4. To add earphone cap on bottom case. - 26 -...

  • Page 28: Main Assembly

    4. ASSEMBLY INSTRUCTIONS 5. To add Mic boot on bottom case 6. To add mini-USB cap on bottom case 4.6 Main assembly 1. To add PCBA sub assembly on top case sub assembly. - 27 -...
  • Page 29 4. ASSEMBLY INSTRUCTIONS 2. To add left side key and strip on main assembly. 3. To add right side key and strip on main assembly. 4. To add bottom sub assembly on main assembly. - 28 -...
  • Page 30 4. ASSEMBLY INSTRUCTIONS 5. To add RF cap on Main assembly 6. To add battery cover on main assembly. - 29 -...

  • Page 31: Technical Specification

    5. TECHNICAL SPECIFICATION 5. TECHNICAL SPECIFICATION 5.1. TX Characteristics All data is applicable to E-GSM900 and DCS1800 / PCS1900 except where stated. 5.1.1. Frequency Error ± 0.1 ppm max. relative to base station frequency. 5.1.2. Modulation Phase Error RMS: Equal to or less than 5° Peak: Equal to or less than 20°...

  • Page 32: Spurious Emissions At Antenna Connector

    5. TECHNICAL SPECIFICATION Measurement conditions for output RF spectrum measurements: Frequency Spen 0 Hz Measurement Bandwidth: 30 kHz Video Bandwidth: 30 kHz (modulation) 100 kHz (switching) Average (Modulation) Over 200 burst Peak Hold (Switching) Over 10 burst 5.1.5. Spurious Emissions at Antenna Connector Frequency range Power level in dBm GSM 400,...
  • Page 33 5. TECHNICAL SPECIFICATION Approx video Frequency range Frequency offset Filter bandwidth bandwidth 100 kHz to 50 MHz 10 kHz 30 kHz 50 MHz to 500 MHz 100 kHz 300 kHz excl. relevant TX band: GSM 450: 450,4 MHz to 457,6 MHz;...

  • Page 34: Residual Peak Power

    5. TECHNICAL SPECIFICATION Approx video Frequency range Frequency offset Filter bandwidth bandwidth GSM 480: 478,8 MHz to 486 MHz > 6,0 MHz 100 kHz 300 kHz GSM 750: 777 MHz to 792 MHz GSM 850: 824 MHz to 849 MHz P-GSM: 890 MHz to 915 MHz E-GSM: 880 MHz to 915 MHz DCS: 1 710 MHz to 1 785 MHz...

  • Page 35: Rx Characteristics

    5. TECHNICAL SPECIFICATION 5.2. Rx Characteristics 5.2.1. Sensitivity E-GSM 900 Full Rate Speech The reference sensitivity performance in terms of frame erasure, bit error, or residual bit error rates (whichever is appropriate) is specified in the following table, according to the propagation conditions. Propagation Conditions Propagation Propagation...
  • Page 36 5. TECHNICAL SPECIFICATION DCS 1800 Full Rate Speech The reference sensitivity performance in terms of frame erasure, bit error, or residual bit error rates (whichever is appropriate) is specified in the following table, according to the propagation conditions. Propagation Conditions Propagation Propagation Channels...
  • Page 37 5. TECHNICAL SPECIFICATION PCS 1900 Full Rate Speech The reference sensitivity performance in terms of frame erasure, bit error, or residual bit error rates (whichever is appropriate) is specified in the following table, according to the propagation conditions. Propagation Conditions Propagation Propagation Channels...

  • Page 38: Calibration

    6. Calibration 6. Calibration 1. Select the comport no. which connected to mobile or fixture 2. Main Form - 37 -...
  • Page 39 6. Calibration (1) Open NVRAM database: Select the NVRAM database (2) Open configuration file: Select configuration file - 38 -...
  • Page 40 6. Calibration (3) Setup logging file: Decide the log file (4) Setup result file: Decide the result file - 39 -...
  • Page 41 6. Calibration (5) Open calibration data initial file: Open data initial file to calibration (6) Setup calibration data result file path: Decide the data result folder - 40 -...
  • Page 42 6. Calibration 3. Keep the mobile power off and put the mobile on fixture or connect mobile with cable then click the start button 4. After click Start button , waiting for mobile power on - 41 -...
  • Page 43 6. Calibration 5. Calibration begin Appendix :Cable loss 1. Click configuration file - 42 -...
  • Page 44 6. Calibration 2. Make up for the cable loss value - 43 -...

  • Page 45: Block Diagram

    7. BLOCK DIAGRAM 7. BLOCK DIAGRAM 7.1. C2500 Base band Hardware Typical application and Block Diagram Figure 7.1: Typical application of MT6217 - 44 -...
  • Page 46 7. BLOCK DIAGRAM Figure 7.2: MT6217 Block Diagram - 45 -...

  • Page 47: C2500 Rf Block Diagram

    7. BLOCK DIAGRAM 7.2. C2500 RF Block Diagram Figure 7.3: MT6120 Block Diagram - 46 -...

  • Page 48: C2500 Pcb Placement

    8. C2500 PCB PLACEMENT - 47 -...
  • Page 49 8. C2500 PCB PLACEMENT - 48 -...

  • Page 50: Circuit Diagram

    9. CIRCUIT DIAGRAM - 49 -...
  • Page 51 9. CIRCUIT DIAGRAM BB_Main - 50 -...
  • Page 52 9. CIRCUIT DIAGRAM LCD & Keypad - 51 -...
  • Page 53 9. CIRCUIT DIAGRAM PMIC & LED - 52 -...
  • Page 54 9. CIRCUIT DIAGRAM Cmos - 53 -...
  • Page 55 9. Circuit Diagram Momery & Audio - 54 -...
  • Page 56 9. Circuit Diagram - 55 -...
  • Page 57 9. CIRCUIT DIAGRAM - 56 -...

  • Page 58: Replacement Part List

    10. REPLACEMENT PART LIST Note: This Chapter is used for reference, Part order is ordered by SBOM standard on GCSC ITEM Darts P/No. Description Min. Q'ty Location LG part number Chip Set 2255-6217-3080 RISC PROCESSOR,TFBGA,282P U201 EUSY0298601 225K-T700-1080 BACKEND IC,TFBGA,96P,AIT700G/CN1-G U500...
  • Page 59 10. REPLACEMENT PART LIST ITEM Darts P/No. Description Min. Q'ty Location LG part number EME -SMT 220B-0010-0000 BACKUP BATT D4.8xH1.4mm 0.06F XC414-II06E N401 SBCL0001003 221J-EP06-0988 EARPHONE JACK KM03011ABGS1 6P J101 ENJE0005101 220S-2010-0081 SWITCH,RF TEST SWITCH,6000MHz 2W J601 ENWY0004101 221C-SC06-0182 CONN.,SIM CARD CONN.,6PIN,217+010+606,ACT...
  • Page 60 10. REPLACEMENT PART LIST ITEM Darts P/No. Description Min. Q'ty Location LG part number PRE-SUB ASS'Y OSP,PRE-SUB BOTTOM CASE ASS'Y,ARI, 228S-2187-0010 ACGM0071701 LOG,SILVER PRE-SUB ASS'Y OSP,PRE-SUB BOTTOM CASE ASS'Y,ARI, 228S-2187-0110 ACGM0071702 LOG,BLUE ME Ass'y 2206-6020-0088 SPEAKER,DMS1508C-11-PC-F3-G SUSY0020801 2214-MF13-3Z80 SCREW,D2.4XM1.6X3.8,ZN,WHITE GMZZ0020401...
  • Page 61 Note...
  • Page 62 Note...

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