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LG G1800 Service Manual

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G1800
Version: 1A

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Summary of Contents for LG G1800

  • Page 1 G1800 Version: 1A...

  • Page 2: Table Of Contents

    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.
  • Page 3 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 G1800 Base band Hardware Typical application and Block Diagram 6.2 G1800 RF Block Diagram 7. G1800 PCB PLACEMENT 8. SPPL list...
  • Page 4 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...

  • 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

    1.1. 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.

  • Page 7: General Description

    2.2. Features The LG Telephone Model G1800 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 8: Hand Portable Main Kits

    2.3. Hand portable Main Kits Figure 2.1: Hand portable Main Unit Kit Content Item Description Part Number Handset G1800 AC Travel Charger TA-18GR Standard Battery (Li-lon 720mAh) SBPL0076310...

  • Page 9: 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. The following icons are available: Figure 3.1: Crystal Display 1.
  • Page 10 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 11: Location Of Controls

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

  • Page 12: Alpha Entry

    3.4. Alpha Entry .4.1. Character Set / Key Assignments here are 20 keys on G1800, 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 Keyp ad Layout’s reference.

  • Page 13: Key Function List

    Key Function List A. Power/End key. • Switch phone o n an off. Also, ends a call or Exit from any function and back to Idle mode. B. Selection Key • The function of the k s dep nds on the text shown on the display above the keys. For example, Menu and Name in Idle mode.

  • Page 14: Public Man Machine Interface (Mmi)

    3.5. Public Man Machine Interface (MMI) .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. .5.2. Features for Factory Service Features Description By 2945#*# to enter production mode Contrast 4.Back light Production or service mode...

  • Page 15: Tips For Call Option

    3.5.3.Tips for Call Option 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 16: Troubleshooting

    3.7. Troubleshooting he user is given the following information and advised to contact the dealer if the problems persist: Problem Cause Remedy Telephone will not Check tha t 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 17: Assembly Instructions

    4. ASSEMBLY INSTRUCTIONS 4.1. Assembly Structure...

  • Page 18: Antenna Sub Assembly

    4.2. Antenna sub assembly To tear off paper liner form bracket sticker. To add antenna bracket on antenna base. To add antenna bracket on antenna base. To add set (refer to appendix 1) on antenna base.

  • Page 19: Appendix 1 Speaker Module Sub Assembly

    4.2.1. Appendix 1 Speaker module sub assembly To stick speaker rubber on speaker. To stick speaker gasket on speaker rear side.

  • Page 20: Pcb Sub Assembly

    4.3. PCB sub assembly To add shield cover on PCB. To hook LCM bracket assembly on PCB. To stick metal dome film on PCB.

  • Page 21: Top Case Sub Assembly

    To add antenna module on PCB. 4.4. Top case sub assembly To add keypad assembly on top case pre-sub assembly (refer to appendix 2). To add receiver on top case pre-sub assembly.

  • Page 22: Bottom Case Sub Assembly

    4.5. Bottom case sub assembly To add battery connector on bottom case. To add vibrator on bottom case. To add vibrator on bottom case.

  • Page 23: Main Assembly

    4.6. Main assembly To tear off protect film form lens inner side and PCB assembly on top case. To add side key_1 and strip_1 on main assembly left side. To add side key_2 and strip_2 on main assembly right side.
  • Page 24 To add bottom sub assembly on main assembly. To stuff RF rubber cap into main assembly. To fasten screw on main assembly.
  • Page 25 To stick IMEI / SN label on main assembly. To stick seal label on screw hole as illustration. To add battery cover on main assembly.

  • Page 26: Technical Specification

    5. TECHNICAL SPECIFICATION 5.1. TX Characteristics All data is applicable to E-GSM900 and DCS1800 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 27: Output Rf Spectrum Due To Switching Transients

    5.1.4. Output RF Spectrum due to Switching Transients Offset from Centre Maximum Level (dBm) Frequency (kHz) E-GSM 900 DCS 1800 ±400 ﹣19 ﹣22 ±600 ﹣21 ﹣24 ±1200 ﹣21 ﹣24 ±1800 ﹣24 ﹣27 Measurement conditions for output RF spectrum measurements: Frequency Spen 0 Hz Measurement Bandwidth: 30 kHz...
  • Page 28 Frequency range Frequency offset Filter bandwidth Approx video 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; GSM 480: 478,8 MHz to 486 MHz, and the RX bands: For GSM 400 MS: 460,4 MHz to 467,6 MHz;...

  • Page 29: Residual Peak Power

    Frequency range Frequency offset Filter bandwidth Approx video 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 NOTE 1: The excluded RX bands are tested in sub clause 13.4.

  • Page 30: Rx Characteristics

    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 Conditions Channels...
  • Page 31 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 Conditions Channels Propagation Conditions RA Static Conditions TUhigh...

  • Page 32: Block Diagram

    6. BLOCK DIAGRAM 6.1. G1800 Base band Hardware Typical application and Block Diagram Figure 6.1: Typical application of MT6218B...
  • Page 33 Figure 6.2: MT6218B Block Diagram...

  • Page 34: G1800 Rf Block Diagram

    6.2. G1800 RF Block Diagram Figure 6.3: MT6219 Block Diagram...

  • Page 35: G1800 Pcb Placement

    7. G1800 PCB PLACEMENT...
  • Page 36 G1800 Bottom Silkscreen...
  • Page 37 SPPL for LG - G1800 Version : 1124 ITEM Darts P/No. SVC 여부 Description Mini. Q'ty Location LG part number Chip Set D1TRMT6218B040 RISC PROCSSOR MT6218B TFBGA 274P U201 EUSY0244701 D1TTMT6129N000 RF TRANSCEIVER MT6129N QFN 56P U604 EUSY0244301 D1V2MT63050000 PM MT6305 QFN48 48P...
  • Page 38 Antenna Ass'y ( w Louder SPK) SNGF0005701 Top case Ass'y D1K12012100201 Receiver Panasonic - EASG1D501E2 SURY0009301 D3501PHXLG00S0 Pre-sub top case Ass'y LG Silver ( w LENS) ACGK0044001 D31DPPHXG00000 Deco. Plate for Play key Grey MDAC0011201 D31DPPHXG00010 Deco. Plate for Volume key Grey...
  • Page 39 RF_SW_CAP rubber Grey MCCF0020501 D3231163835210 Screw (M1.6*3.8)，ZN，White 1000 GMZZ0015801 Accessory D1B10377212010 Battery Pack LG SBPL0076310 D7003PHXLGRU03 Travel Charger ( Russia standard) LG SSAD0007869 D7001000000001 USB cable ( MP3 download cable) SGDY0005603 D7005000000300 Regular Stereo Earmic SGEY0004701 Include part Service RF Cable...

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