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LG RT-20LA30 Service Manual

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P/NO : 3828VD0090E
Dec.,2001
Printed in Korea
e-mail:http://www.LGEservice.com/techsup.html
LCD TV

SERVICE MANUAL

CHASSIS : MF-002A
MODEL : RT-20LA30
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
website:http://biz.LGservice.com

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Summary of Contents for LG RT-20LA30

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : MF-002A MODEL : RT-20LA30 CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. Dec.,2001 P/NO : 3828VD0090E Printed in Korea...

  • Page 2: Table Of Contents

    CONTENTS Contents ....................2 Safety Precautions ..................3 Servicing Precautions ................4 Descriptions of Controls ................ 6 Adjustment Instruction ................9 Troubleshooting ..................18 Exploded View ..................20 Exploded View Parts List ...............21 Replacement Parts List ................ 22 SVC. Sheet ....................- 2 -...

  • Page 3: Safety Precautions

    SAFETY PRECAUTIONS IMPORT ANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by the Schematic Diagram and Replacement Parts List. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.

  • Page 4: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service transistors and semicounductor "chip" components. The manual and its supplements and addenda, read and follow the following techniques should be used to help reduce the SAFETY PRECAUTIONS on page 3 of this publication. incidence of component damage caused by static by static NOTE: If unforeseen circumstances create conflict between the electricity.
  • Page 5 c. Qulckly move the soldering iron tip to the junction of the Fuse and Conventional Resistor component lead and the printed circuit foil, and hold it Removal/Replacement there only until the solder flows onto and around both the 1. Clip each fuse or resistor lead at top of the circuit board component lead and the foil.

  • Page 6: Description Of Controls

    DESCRIPTION OF CONTROLS All the functions can be controlled with the remote control handset. Some functions can also be adjusted with the buttons on the front panel of the set. Remote control handset Before you use the remote control handset, please install the bat- POWER MUTE teries.

  • Page 7: For Further Details, See The 'Teletext' Section

    8. MUTE switches the sound on or off. 9. TV/AV selects TV or AV monitor mode. clears the menu from the screen. switches the set on from standby. POWER MUTE 10. SLEEP sets the sleep timer. 11. LIST displays the programme table. 12.

  • Page 8: Tv/Av

    RE/RL-20LA30 series Side panel S-VIDEO VIDEO MONO AUDIO Back panel 1. MAIN POWER (ON/OFF) 7. POWER/STANDBY INDICATOR (r r ) switches the set on or off. illuminates brightly when the set is in standby mode. 2. TV/AV dims when the set is switched on. selects TV or AV monitor mode.

  • Page 9: Adjustment Instruction

    ADJUSTMENT INSTRUCTION 1. Application Object 5. Using method for CA-110 This instruction is for the application to the LCD TV. Use it in case of needing adjustment brightness. 2. Notes COLOR ANALYZER: Center of CA110 Screen (1) This set uses an adapter, so connect the adapter and the Input signal of Video set correctly before adjustment.
  • Page 10 OPTION OPTION TEXT I/II SA SCART A2 ST TEXT I/II SA SCART A2 ST Data Data - 10 -...
  • Page 11 OPTION OPTION TEXT I/II SA SCART A2 ST TEXT I/II SA SCART A2 ST Data Data - 11 -...
  • Page 12 OPTION OPTION TEXT I/II SA SCART A2 ST TEXT I/II SA SCART A2 ST Data Data - 12 -...
  • Page 13 Table 2. OPTION 2 Function ACMS BBACK LANG DATA Option Code Function Remark Austrailia Without ACMS funtion ACMS With ACMS funtion NORMAL Volume Curve RUSHED Volume Curve Defaut(0) Without Blue Back BBACK With Blue Back English English only LANG English+EU4 English+Other EU English,Farsi FARSI...
  • Page 14 DATA ACMS BBACK LANG DATA PANEL IIC T INVT MD SA MONO CH+AU Table 3. OPTION 3 Function Option Code Function Remark LOCAL KEY(20A20 MODEL) LOCAL KEY(20LA30 MODEL) Without TURBO SEARCH funtion With TURBO SEARCH funtion LCD PANEL OPTION PANEL Defaut(0) RESERVED Tunning with AFT Voltage...
  • Page 15 PANEL INVT MD SA MONO CH+AU PANEL INVT MD SA MONO CH+AU IIC T IIC T DATA DATA - 15 -...
  • Page 16 PANEL INVT MD SA MONO CH+AU PANEL INVT MD SA MONO CH+AU IIC T IIC T DATA DATA - 16 -...
  • Page 17 PANEL INVT MD SA IIC T MONO CH+AU DATA - 17 -...

  • Page 18: Troubleshooting

    Troubleshooting 1. General Features Symptom Cause Check Point No screen Input error of inverter connector 1) Bend the pin legs of P802B connector -> recheck them 2) Check and repair the IC806,807 SI4925,IC801 SI786,IC803 SI4808. P502 and Pin 21 connector 1) Check and fix P503B connector being slipped out 2) Check and fix the components at P502 LCD module...
  • Page 19 MEMO - 19 -...

  • Page 20: Exploded View

    EXPLODED VIEW - 20 -...

  • Page 21: Exploded View Parts List

    EXPLODED VIEW PARTS LIST PART NO. DESCRIPTION 6304VT2011A LCD LC201V1-A1 20.1” LGPHILIPS-LCD 120-D44E SPEAKER,4 OHM 3/5W 80DB 6410VWH006A POWER CORD EB10A VDE/SEMKO 1800MM H 3091V00A20D CABINET ASSEMBLY 5020V00552C BUTTON 5020V00553A BUTTON,POWER 3809V00A10M BACK COVER ASSY 4811V00019A BRACKET ASSY,ABS STAND 4950V00081B METAL,HINGE FIXER SUS304 3550V00202A COVER,A/V ABS...

  • Page 22: Replacement Parts List

    REPLACEMENT PARTS LIST For Capacitor & Resistors, the CC, CX, CK, CN : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit CQ : Polyestor RS : Metal Oxide Film in the P/No. means as follows; CE : Electrolytic RN : Metal Film RF : Fusible LOCA.
  • Page 23 For Capacitor & Resistors, the CC, CX, CK, CN : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit CQ : Polyestor RS : Metal Oxide Film in the P/No. means as follows; CE : Electrolytic RN : Metal Film RF : Fusible LOCA.
  • Page 24 L807 6210TCE001G FILTER,HH-1M3216-501 CERATEC 3216MM R SWITCH L901 6210TCE001G FILTER,HH-1M3216-501 CERATEC 3216MM R SW1101 140-313A SWITCH,TACT 2LEAD 100G(TA) LG C&D NON L902 6210TCE001G FILTER,HH-1M3216-501 CERATEC 3216MM R SW1101 6600VM1001A SWITCH,SDKLA1 ALPS UL/CSA 250V 5A VER L903 6210TCE001G FILTER,HH-1M3216-501 CERATEC 3216MM R...
  • Page 25 RESONATOR,CRYSTAL SX-1SMD SUNNY RADIAL 14.318MHZ X601 6202VDT002B RESONATOR,CRYSTAL SX-1SMD SUNNY RADIAL 14.318MHZ X901 156-A02M RESONATOR,CRYSTAL HC49U KJE RADIAL 18.432MHZ 30P ACCESSORIES 3828VA0310L MANUAL,OWNERS UKR/BZ03 LG RU/EN 061M 6710V00061M REMOTE CONTROLLER 6634VBW002L ADAPTER,RF 100/220VVOLT 15VOLT MISCELLANEOUS PA1101 6726VV0006D REMOTE CONTROLLER RECEIVER 38.0KHZ...
  • Page 26 BLOCK DIAGRAM...
  • Page 28 PRINTED CIRCUIT BOARD MAIN(TOP)
  • Page 29 MAIN(BOTTOM)
  • Page 30 MX(TOP) MX(BOTTOM) CONTROL(TOP) CONTROL(BOTTOM) SPEAKER(TOP) TUNER(TOP) TUNER(BOTTOM)

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