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LG RZ-20LA70 Service Manual

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Download this manual See also: Owner's Manual
P/NO : 3828VD0168C
更多难得图纸资料可去 中国家电维修技术联盟网 免费下
http://bbs.jdwx.net.cn/
Oct.,2003
Printed in Korea
e-mail:http://www.LGEservice.com/techsup.html
LCD TV
SERVICE MANUAL
CHASSIS : ML-024D
MODEL : RZ-20LA70
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
website:http://biz.LGservice.com

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  • Page 1 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html LCD TV SERVICE MANUAL CHASSIS : ML-024D MODEL : RZ-20LA70 CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. Oct.,2003 P/NO : 3828VD0168C Printed in Korea...

  • Page 2: Table Of Contents

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ CONTENTS CONTENTS ....................2 PRODUCT SAFETY ..................3 DESCRIPTION OF CONTROLS .............. 4 ADJUSTMENT INSTRUCTION ..............7 TROUBLE SHOOTING ................13 PRINTED CIRCUIT BOARD ..............14 BLOCK DIAGRAM...................17 EXPLODED VIEW .................. 18 EXPLODED VIEW PARTS LIST ..............19 REPLACEMENT PARTS LIST ............... 20 SVC.

  • Page 3: Product Safety

    No deviations are 6. Do not remove a replacement ES device from its protective package until allowed without prior approval by LG Electronics Inc. Service work should be immediately before you are ready to install it. (Most replacement ES devices...

  • Page 4: Description Of Controls

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ 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 side panel of the set. Remote control handset MUTE POWER Before you use the remote control handset, please install the bat- teries.

  • Page 5: These Buttons Are Used For Teletext

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ 9. POWER switches the set on from standby or off to standby. 10. I/II selects the language during dual language broadcast. selects the sound output (option). 11. MENU MUTE POWER selects a me TV/AV I/II 12. PSM (Picture Status Memory) recalls your preferred picture setting.
  • Page 6 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ Side panel • RZ- 20LA70 series S-VIDEO VIDEO (MONO) AUDIO Back panel 1. ON/OFF (O/I) 7. POWER/STANDBY INDICATOR (O) switches the set on from standby or off to illuminates red in standby mode. standby. illuminates green when the set is switched on. Note : Power line lives even when the power is off.

  • Page 7: Adjustment Instruction

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ ADJUSTMENT INSTRUCTION 1. Application Object This instruction is for the application to the LCD TV. 2. Notes (1) This set uses an adapter, so connect the adapter and the set correctly before adjustment. (2) The adjustment must be performed under the correct sequence.
  • Page 8 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ 4. Option 1 data setting (200PR ~ A2 ST:1bit, SYS:2bit composition) OPTION OPTION TEXT I/II SV SCART A2 ST TEXT I/II SV SCART A2 ST 200PR 200PR Data Data - 8 -...
  • Page 9 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ OPTION OPTION TEXT I/II SV SCART A2 ST TEXT I/II SV SCART A2 ST 200PR 200PR Data Data - 9 -...
  • Page 10 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ OPTION OPTION TEXT I/II SV SCART A2 ST TEXT I/II SV SCART A2 ST 200PR 200PR Data Data - 10 -...
  • Page 11 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ OPTION TEXT I/II SV SCART A2 ST 200PR Data 5. Option2 data(ACMS~BBACK:1bit,LANG:3bit) OPTION OPTION ACMS BBACK LANG ACMS BBACK LANG Data Data - 11 -...
  • Page 12 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ 6. Option3 data(IIC AFT~CH+AU:1bit) OPTION HiDEV IIC T MONO CH+AUS Data - 12 -...

  • Page 13: Trouble Shooting

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ TROUBLE SHOOTING 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 IC805 SI4925. P1 and Pin 50 connector 1) Check and fix P1 connector being slipped out Cracked components and...

  • Page 14: Printed Circuit Board

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ PRINTED CIRCUIT BOARD MAIN(TOP) - 14 -...
  • Page 15 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ MAIN(BOTTOM) - 15 -...
  • Page 16 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ POWER CONTROL - 16 -...

  • Page 17: Block Diagram

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ BLOCK DIAGRAM - 17 -...

  • Page 18: Exploded View

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ EXPLODED VIEW - 18 -...

  • Page 19: Exploded View Parts List

    PART NO. DESCRIPTION 6306V20002A LCD MODULE,V201V1-T01 VGA CHIMEI TFT COLOR 6400GKTX01A SPEAKER,FULLRANGE F1527C-6428 K-TONE 8OHM 7/12W 83DB OTHERS 4811V00076A BRACKET ASSEMBLY,REAR AV RZ-20LA70 ML024D . 4950V00192A METAL,SHIELD SBHG ML024 4950V00192C METAL,SHIELD SBHG 20LA70 C/SKD 4950V00188A METAL,FRAME SBHG FOR CMO MODULE...

  • Page 20: Replacement Parts List

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ 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...
  • Page 21 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ 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 22 6210TCE001G HH-1M3216-501 3216MM R/TP 6602T10002D ETC 50P FH12-50S-0.5H HIROSE . L200 6200JB8010L MLB-201209-1000L-N2 P100 366-932E 2.5MM 6P GIL-G LG CABLE S (STICK) L200 6210TCE001A HB-1S2012-080JT 2012MM CHIP-BEAD P101 6602V20005L 2.0MM 12P GIL-S LG CABLE STRAIGHT L201 6210TCE001A HB-1S2012-080JT 2012MM CHIP-BEAD...
  • Page 23 L701 125-022K FERRITE 1UH TAPING TH701 163-048D THERMISTOR,KL15L2R5 +/- 15% 125V L702 125-022K FERRITE 1UH TAPING TU401 6700PF0002A TUNER,TAFH-S321D LG PAL FS 4SYS L703 6210TCE001G HH-1M3216-501 3216MM R/TP VA701 164-003K VARISTOR,SVC621D-14A ILJIN 620V 0% L704 6210TCE001G HH-1M3216-501 3216MM R/TP L801...
  • Page 24 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ P/NO:3854VA0135A-S1 2003.10.13...
  • Page 25 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ SVC. SHEET : 3854V A0135A-S1...
  • Page 26 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ website:http://biz.LGservice.com e-mail:http://www.LGEservice.com/techsup.html LCD TV SERVICE MANUAL CHASSIS : ML-041B MODEL : RZ-20LA70 (RZ-20LA70 Rev A) ) ID LABEL Model No. CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. *Same looking with new chassis...

  • Page 27: Svc. Sheet

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ CONTENTS CONTENTS ....................2 PRODUCT SAFETY ..................3 SPECIFICATION ..................4 ADJUSTMENT INSTRUCTION ...............10 TROUBLE SHOOTING ................12 BLOCK DIAGRAM...................17 WIRING DIAGRAM ..................19 EXPLODED VIEW .................. 20 EXPLODED VIEW PARTS LIST ..............21 REPLACEMENT PARTS LIST ............... 22 SVC. SHEET ....................

  • Page 28: Safety Precautions

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ SAFETY PRECAUTIONS IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in 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 29: Servicing Precautions

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service unit under test. manual and its supplements and addenda, read and follow the 2. After removing an electrical assembly equipped with ES SAFETY PRECAUTIONS on page 3 of this publication. devices, place the assembly on a conductive surface such as NOTE: If unforeseen circumstances create conflict between the aluminum foil, to prevent electrostatic charge buildup or...
  • Page 30 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through Circuit Board Foil Repair which the IC leads are inserted and then bent flat against the Excessive heat applied to the copper foil of any printed circuit circuit foil.

  • Page 31: Specification

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range This specification is applied to ML-041B chassis. 2. Requirement for Test Testing for standard of each part must be followed in below condition.
  • Page 32 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ 4. Feature and Function Item Specification Remark Teletext Top(option) TOP, FLOF REMOCON PAL/ NTSC NEC Code CVBS VIDEO Input Rear S-VIDEO Input Rear Component input Rear (option, NT) PERI TV Connector Full SCART : 1 Rear (option,EU) H/p input Rear RS-232...
  • Page 33 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ 6.Engineering Specification Item Specification Remark Power Supply H/V Sync Video Power Consumption LED Color Normal On/On Active GREEN Stand By Off/On Suspend Mode On/Off DPM Off Mode Off/Off Cut-off Switch off PBP SWAP ON/OFF ITEM Spectification Remark D-SUB Pin Configuraion 1: RED...
  • Page 34 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ 6-2.Power Item Unit Remark AC Power Shut Down Voltage DC Voltage, Inverter 22.8 25.2 DC Voltage, LCD Panel 11.4 12.6 DC Voltage, Audio 14.0 16.0 DC Voltage, Tuner(5) DC Voltage, Tuner(9) Japan only DC Voltage, Tuning(31) DC Voltage, VCTi(5) DC Voltage, VCTi(8) DC Voltage, VCTi(3.3)

  • Page 35: Adjustment Instruction

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ ADJUSTMENT INSTRUCTION 1. Application Object This instruction is for the application to the LCD TV. 2. Adjustment 2.1 Adjustment overview The unit is set to automatically adjust using the factory automation equipment. However when errors occur, it should be adjusted manually. 2.2 Auto Gain/Offset adjustment 2.2.1 RF Mode adjustment 2.2.1.1 Adjustment preparation...
  • Page 36 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ SVC REMOCON To turn the TV on or off POWER To turn the TV on automatically if the power is supplied to the TV. (Use the POWER ON POWER key to deactivate): It should be deactivated when delivered. To activate the mute function.

  • Page 37: Troubleshooting

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ TROUBLESHOOTING No power :[A]Process (LED indicator off) Check short of main B/D Check 15V or 5V or Change Lips Fail of Lips Pass Check Output of Change Q1100 Fail Q1100 Pass Check Output of Change IC1107, IC1104 IC1107, IC104 Fail Pass...
  • Page 38 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ No Raster :[B]Process Check LED Status Repeat A PROCESS on display unit Fail Check L900,L901 Change L900,L901, L902,L903 L902,L903 Fail Pass Check the input/ Change IC901 Output of IC901 Fail Pass Change inverter Check inverter connector or inverter Connector or inverter Fail Pass...
  • Page 39 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ No Raster on Component signal Repeat [A] Process Pass Check the signal of Check JA1200 or L1200, L1202, L1203 RCA CABLE Fail Pass Re-soldering or Check the input/ Change the defect part, Fail output of IC1 Check X11 Re-soldering or Check the input/output...
  • Page 40 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ No Raster on AV Signal No Raster on TV(RF) signal (Video, S-Video) Check 5V, 33V of TU1000 Repeat Check the output of Re-soldering or [A] Process Fail Fail TU1000 Change the defect part Pass Check the signal of Change L1209, L1210, L1209, L1210, L1212 L1212...
  • Page 41 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ No Sound Check the Change source input input source Fail Pass Re-soldering or Check the input/output Change the defect part of IC1 Fail Check X11 Pass Re-soldering or Check the input/output Change the defect part of IC100,IC101 Fail Pass Check the speaker...

  • Page 42: Block Diagram

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ BLOCK DIAGRAM...
  • Page 43 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ BLOCK DIAGRAM DESCRIPTION 1. Video Controller Unit & Display Data Conversion Unit The video controller unit receives the video signals inputted through the tuner, AV port (AV1, AV2, S-Video, component), and converts them into an analog RGB signal through the microcomputer (VCTI) combined with the video decoder that integrates various functions in one chip.
  • Page 44 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ LOCAL KEY IR_LED...
  • Page 45 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/...

  • Page 46: Exploded View Parts List

    METAL, PLATE 15, 20LA70 REAR A/V "B" T 4810V00925B BRACKET, REAR AV RZ-15LA70 ML024E HIPS . 5020V00871A BUTTON, CONTROL RZ-20LA70 ABS 8KEY . 3550V00383A COVER, REAR AV RZ-20LA70 HIPS 60HR . 4950V00157E METAL, HINGE ASSY NON 20LA70 4810V00767A BRACKET, STAND 20LA60 ML012B NON HINGE FRONT 4810V00768A...

  • Page 47: Replacement Parts List

    更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ REPLACEMENT PARTS LIST For Capacitor & Resistors, the CC, CX, CK, CN, CH : Ceramic RD : Carbon Film charactors at 2nd and 3rd digit in the CQ : Polyestor RS : Metal Oxide Film P/No. means as follows; CE : Electrolytic RN : Metal Film CF : Fixed Film...
  • Page 48 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ DATE: 2004. 06.16. DATE: 2004. 06.16. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C115 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R 0CC221CK41A 220PF 1608 50V 5% R/TP NP0 C116 0CK562CK51A 5600PF 1608 50V 10% R/TP B(Y5...
  • Page 49 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ DATE: 2004. 06.16. DATE: 2004. 06.16. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION FET & TRANSISTOR IC905 0IZZTSA003A ML-041B VGA PAL ATMEL 32P PLC-CMO IC1107 0TF492509AA SI4925DY TP TEMIC 30V 6.1A S IC905...
  • Page 50 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ DATE: 2004. 06.16. DATE: 2004. 06.16. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C931 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP C932 0RH0000D622...
  • Page 51 0RN2000F409 200 1/6W 1% TA52 ZD1212 0DZ620009HB UDZ S 6.2B TP ROHM SOD323 200 SW2200 140-313A TACT 2LEAD 100G(TA) LG C&D NO ZD1213 0DZ620009HB UDZ S 6.2B TP ROHM SOD323 200 SW2201 140-313A TACT 2LEAD 100G(TA) LG C&D NO ZD1214 0DZ620009HB UDZ S 6.2B TP ROHM SOD323 200...
  • Page 52 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ DATE: 2004. 06.16. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1233 0RH4703D622 470K 1/10W 5 D.R/TP R1234 0RH5101D622 5.1K 1/10W 5 D.R/TP R1235 0RH4703D622 470K 1/10W 5 D.R/TP R1236 0RH1802D622 18K 1/10W 5 D.R/TP R1237 0RH1802D622 18K 1/10W 5 D.R/TP...
  • Page 53 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/...
  • Page 54 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/...
  • Page 55 更多难得图纸资料可去 中国家电维修技术联盟网 免费下 http://bbs.jdwx.net.cn/ Jun., 2004 P/NO : 3828TSL103L Printed in Korea...

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