LG RT-15LA70 Page 1 Service Manual Download

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LCD TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : ML-041B

MODEL: RT-15LA70

(RT-15LA70 Rev A)

website:http://biz.LGservice.com

e-mail:http://www.LGEservice.com/techsup.html

*( ) ID LABEL Model No.

*Same looking with new chassis

*Issue Date; 2004. 06

Summary of Contents for RT-15LA70

Page 1: ...NG THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS ML 041B MODEL RT 15LA70 RT 15LA70 Rev A website http biz LGservice com e mail http www LGEservice com techsup html ID LABEL Model No Same looking with new chassis Issue Date 2004 06 ...

Page 2: ...NTS 2 PRODUCT SAFETY 3 SPECIFICATION 4 TIMING CHART 11 ADJUSTMENT INSTRUCTION 12 TROUBLE SHOOTING 16 BLOCK DIAGRAM 21 WIRING DIAGRAM 23 EXPLODED VIEW 24 EXPLODED VIEW PARTS LIST 25 REPLACEMENT PARTS LIST 26 SVC SHEET ...

Page 3: ...t such as antennas terminals etc to be sure the set is safe to operate without damage of electrical shock Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in...

Page 4: ...ely obtain and wear a commercially available discharging wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge buildup or exposure of the assembly 3 Use only a grounde...

Page 5: ...t shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replaced component and adjacent components and the circuit board...

Page 6: ...h Size mm Surface Treatment Operating Mode Back light Unit R T Typ Maker Type ActiveDisplay Area Pixel Pitch mm Electrical Interface Color Depth Size mm Surface Treatment Operating Mode Back light Unit R T Typ LPL TFT Color LCD Module 15 0 inches 380 16mm diagonal Aspect 4 3 0 0 297mm H x0 297mm V xRGB LVDS 6BIT WITH FRC 16 777 216 colors 332 8 H x262 2 V x18 D Anti Glare HAZE 3 Hard Coating 3H No...

Page 7: ... 1 2 3 4 4 Feature and Function 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Teletext REMOCON AV Input S Vedio Input Component input PERI TV Connector RGB VGA Input H p input PC Sound input RS 232 Discrete IR 2 Carrier Stereo NICAM Stereo 2 Carrier Dual NICAM Dual DW Double Window Mode MW Multi Window Mode Film Mode Noise Reduction Progressive Scan Motion Detection SR...

Page 8: ...AM BG 2 PAL SECAM DK 3 PAL I I 4 SECAM L L 5 NTSC M 6 PAL N M 7 NTSC M VHF E2 E12 UHF E21 E69 CATV S1 S20 HYPER S21 S41 L L B C D VHF 2 13 UHF 14 69 CATV 1 125 VHF Low 1 M10 VHF High 4 S22 UHF S23 62 AC 100 240V 50Hz 60HZ FVS 100 program FS 1 Temp 0 40 deg 2 Humidity 85 3 Temp 20 60 deg 4 Humidity 85 Item Specification Remark No EU Non EU RZ RT PAL Market 7 NTSC Area RM PAL FRANCE NTSC JAPAN PAL 2...

Page 9: ... Remark 1 2 3 4 5 Power Supply Normal Stand By Suspend Mode DPM Off Mode Cut off Switch off ITEM D SUB Pin Configuraion Control Function Y Pb Pr D4 Jack 525i 525p 750p 1125i H V Sync On On Off On On Off Off Off Spectification 1 RED 3 Blue 5 S T GND 7 Green GND 9 N C 11 ID0 GND 13 H Sync 15 SCL 1 Contrast Brightness 2 H Position V Position 3 Tracking Clock Phase 4 Auto Configure RESET 1 Y 3 Pb 5 Pr...

Page 10: ...OCON Working Sensitivity Straight REMOCON Working Sensitivity T B L R Closed Caption Sensitivity Teletext Sensitivity 0 1 0 1 85 10 9 70 70 dBm m m dBm dBm LGE Specification 30 degree NTSC ONLY Item Min Typ Max Unit Remark Mode H_display V_display V frequency H_total H_blanking H_sync H Polarity H_bp H_fp H freq kHz Clk MHz V_total V_blanking V_sync V Polarity V_bp V_fp VGA 60 640 480 60 800 160 9...

Page 11: ...80 1 3 16 H 31 469 900 720 18 108 54 V 70 082 449 400 13 2 34 H 37 879 1056 800 40 128 88 V 60 317 628 600 1 4 23 H 46 875 1056 800 16 80 160 V 75 0 625 600 1 3 21 H 48 363 1344 1024 24 136 160 V 60 004 806 768 3 6 21 Mode H V Sort 1 2 3 4 5 6 7 25 175 28 324 25 175 31 5 40 0 49 5 65 0 640x350 640x480 800x600 720x400 800x600 800x600 1024x768 Sync Polarity Frequency Dot Clock Total Period E Video A...

Page 12: ...t is completed press the Enter Key to save and finish the adjustment 2 2 3 PC Mode adjustment 2 2 3 1 Adjustment preparation Conduct Heat Run at the RF fog signals for more than 30 minutes Connect the Pattern Generator to 15 Pin D Sub Jack of LCD TV 2 2 3 2 Auto Gain Offset adjustment Convert the input mode to PC input Using the Pattern Generator 801GF VG819 adjust WXGA 1280 X 768 for resolution a...

Page 13: ...0 Hotel Off 1 Hotel On 0 Top Off 1 Top On 0 Ch Sound Non Memory 1 Ch Sound Memory 0 except below area Off 1 Middle east Area Vol On 0 except below area Off 1 China Australia On Option 1 Option 2 Option PAL NO ITEM CONDITION REMARK 1 2 3 Language Txt Lang Inch opt 1 0 0 0 Eng Only 1 EU5 2 12 nations Europe 3 Eng Chines 4 Eng Arab Urdu 5 Eng FARSI 0 WEST EU 1 EAST EU 1 2 TURKY EU 3 EAST EU 2 4 CYRIL...

Page 14: ... Exit button 2 EDID Read Write 1 Run WinEDID exe 2 Edit Week of Manufacture Year of Manufacture Serial Number a Input User Info Data b Click Update button c Click Write button 220 IBM Compatible PC Video Signal Generator PARALLEL PORT Power inlet required Power LED ST Switch Power Select Switch 110V 220V Control Line N o t u s e d R S 2 3 2 C P A R A L L E L V S Y N C P O W E R S T VGS MONIT OR E ...

Page 15: ...the front AV To move channel up down or to select a function displayed on the screen To adjust the volume or accurately control a specific function To set a specific function or complete setting To move the channel down in the PIP screen To use as a red key in the teletext mode To move the channel in the PIP screen To use as a green key in the teletext mode To switch between the main and sub scree...

Page 16: ... short of main B D or Change Lips Change IC1107 IC1104 Change LED Assy Check 15V or 5V of Lips Check Output of IC1107 IC104 Check LED Assy Check P1100 P210 Connector Fail Fail Change Q1100 Check Output of Q1100 Fail Pass Fail Pass Pass Pass A Process ...

Page 17: ...eck inverter Connector or inverter Check input source cable and jack Repeat A PROCESS Fail Change L900 L901 L902 L903 Fail Change IC901 Fail Change inverter connector or inverter Fail Change panel link cable or module Fail Change module Fail Check panel link Cable or module Pass Pass Pass Pass B Process ...

Page 18: ... Check the input output of IC1 Check the input output of IC901 Check input source cable and jack Fail Re soldering or Change the defect part Check X11 Fail Re soldering or Change the defect part Check X900 Fail Pass Pass Pass Check the input output of IC800 IC851 Re soldering or Change the defect part Fail Pass ...

Page 19: ...e input output of IC1 Check the input output of IC800 IC851 Check input source cable and jack Fail Fail Fail Fail Re soldering or Change the defect part Chek X11 Fail Re soldering or Change the defect part Check 5V 33V of TU1000 Re soldering or Change the defect part Pass Pass Pass Check the input output of IC901 Fail Re soldering or Change the defect part Check X900 Pass Pass ...

Page 20: ... Check the input source Fail Pass Re soldering or Change the defect part Check X11 Check the input output of IC1 Fail Pass Re soldering or Change the defect part Check the input output of IC100 IC101 Fail Pass Change speaker Check the speaker Fail Pass ...

Page 21: ...851 LA7222 IC2 TC90A65F IC500 14066 IC202 D SUB AT24C16 IC4 DIGITAL SIGNAL SOUND INPUT IF INPUT ANALOG SIGNAL SOUND OUTPUT ML 041B Block Diagram POWER IF PC SIDE_AV L R SIDE_L R PC L R L R AUDIO S A W Z1000 SCART V L R S VHS H P V SCART R G B SIDE V Y P b P r RGB OUT TTL 1 OUT TTL 2 OUT LVDS 1 O UT PC RGB COMPONENT ...

Page 22: ...nt to the LCD module as a TTL output VCTi is the main microprocessor that handles video signal processing and sound signal processing It also manages the RF signals received from the tuner The scaler can control timing to fit into the LCD panel and can also control the size and position of the input signal 2 Power Supply Unit The power supply unit provides 15V and 5V DC power to the mainboard The ...

Page 23: ...8P_1 0MM FFC 54MM RZ ONLY 17LZ50 ONLY 6P_2 0MM H B 600MM 3P_2 5MM H B 220MM 1 20P LVDS 200MM 2 41P TTL 3 50P TTL 145MM 4P_2 5MM SHIELD RECEPTERCLE GND 2PIN 4PIN 500MM 750MM 1 4 5 3 2 6 8 9 7 WIRING DIAGRAM No Part No 1 2 3 4 5 6 7 8 Wiring Part List 6631T25019Y 6631T11012R 6631T20028G 6631T20033U 6631T25021A 6631T11017N ...

Page 24: ...EXPLODED VIEW 1 2 3 4 5 5 6 8 7 10 11 12 13 14 17 18 19 20 21 22 15 16 9 ...

Page 25: ...ME MAIN 15LA66 70 LPL MODULE ONLY 9 3313TP1018A MAIN TOTAL ASSEMBLY RT 15LA70 LPL BRAND ML 041B 10 6871TPT281A PWB PCB ASSEMBLY POWER RZ 15LA70 POWER TOTAL POWERNET LIPS FOR CMO LPL HD 11 6871TST561A PWB PCB ASSEMBLY SUB RM 20LA70 ML 041B SUB TOTAL BRAND JACK DVD BOARD ASSY 12 4950TKS300C METAL SHIELD 15LA70 13 3551TKK537B COVER ASSEMBLY RZ 15LA70 REAR A V PHONE ML041B 14 4810V00925B BRACKET REAR ...

Page 26: ...ICATION C930 0CH3104K946 100000PF 50V Z F 2012 R TP C934 0CH3104K946 100000PF 50V Z F 2012 R TP C935 0CH3104K946 100000PF 50V Z F 2012 R TP C936 0CH3104K946 100000PF 50V Z F 2012 R TP C937 0CH3104K946 100000PF 50V Z F 2012 R TP C938 0CH3104K946 100000PF 50V Z F 2012 R TP C939 0CH3104K946 100000PF 50V Z F 2012 R TP C940 0CH3104K946 100000PF 50V Z F 2012 R TP C943 0CH3104K946 100000PF 50V Z F 2012 R...

Page 27: ...1608 50V 5 R TP NP0 C48 0CC220CK41A 22PF 1608 50V 5 R TP NP0 C53 0CC102CK41A 1000PF 1608 50V 5 R TP NP0 C56 0CC221CK41A 220PF 1608 50V 5 R TP NP0 DATE 2004 06 03 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C57 0CC221CK41A 220PF 1608 50V 5 R TP NP0 C58 0CC221CK41A 220PF 1608 50V 5 R TP NP0 C74 0CC102CK41A 1000PF 1608 50V 5 R TP NP0 C83 0CC102CK41A 1000PF 1608 50V 5 R TP NP0 C85 0CC102CK41A 1000PF...

Page 28: ...CERATEC 2012 L906 6210TCE001G HH 1M3216 501 CERATEC 3216MM L907 6210TCE001G HH 1M3216 501 CERATEC 3216MM L10 0LC1032101A 10UH 10 3216 R TC FI C3216 L1001 0LC1020101A 1UH 10 2012 R TC FI B2012 1 L1002 0LC1032101A 10UH 10 3216 R TC FI C3216 L15 0LC1032101A 10UH 10 3216 R TC FI C3216 DATE 2004 06 03 S AL LOC NO PART NO DESCRIPTION SPECIFICATION L2 0LC1032101A 10UH 10 3216 R TC FI C3216 L8 0LC1032101A...

Page 29: ... W 5 1608 R TP R226 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP DATE 2004 06 03 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R23 0RJ2701D677 2 7K OHM 1 10 W 5 1608 R TP R230 0RJ7502D677 75K OHM 1 10 W 5 1608 R TP R24 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R240 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R25 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R28 0RJ0000D677 0 OHM 1 10 W 5 1608 R TP R29 0RJ0000D677 0 OH...

Page 30: ...301D622 4 3K 1 10W 5 TA R2113 0RH0000D622 0 1 10W P TYPE TAPPING DATE 2004 06 03 S AL LOC NO PART NO DESCRIPTION SPECIFICATION LED2100 0DL200000CA SAM5670 DL 2LRG BK Y GREEN PA2101 6726TV0001A TSOP4838SO1 VISHAY 38 0KHZ H C1215 0CH3103K516 10000PF 50V 10 B Y5P 2012 C1216 0CH3103K516 10000PF 50V 10 B Y5P 2012 C1221 0CH6331K416 330PF 50V J NP0 2012 R TP C1223 0CH6471K416 470F 50V J NP0 2012 R TP C12...

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Page 33: ...Jun 2004 Printed in Korea P NO 3828TSL103G ...

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