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LCD TV

SERVICE MANUAL

CAUTION

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

CHASSIS : LB73A

MODEL : 26LC7D

26LC7D-AB

website:http://biz.LGservice.com

Summary of Contents for 26LC7D Series

Page 1: ...R LCD TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LB73A MODEL 26LC7D 26LC7D AB website http biz LGservice com ...

Page 2: ... 2 CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 9 TROUBLE SHOOTING 13 BLOCK DIAGRAM 18 EXPLODED VIEW 20 REPLACEMENT PARTS LIST 22 SVC SHEET ...

Page 3: ...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 turn to each exposed metallic parts such as antenna terminals phone jacks etc If the exposed metallic part has a ...

Page 4: ...vely 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 ground...

Page 5: ...not 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 boa...

Page 6: ...ce LGE TV test method followed 3 2 Demanded other specification Safety CB Specification EMC CISPR 13 Specification SPECIFICATION NOTE Specifications and others are subject to change without notice for improvement 4 General TV Specification No Item Specification Remark 1 Broadcasting system PAL B G DTV DVB T 2 Available Channel 1 VHF 0 5 5A 6 9 9A 10 12 2 UHF 20 75 3 CATV 02 44 4 DTV 06 9 9A 10 12 ...

Page 7: ...0 576 15 625 50 00 13 50 SDTV576i 2 720 576 31 25 50 00 27 00 SDTV576p 3 720 480 15 73 15 75 59 94 60 00 13 50 SDTV 480i 4 720 480 31 47 31 50 59 94 60 00 27 00 SDTV 480p 5 1280 720 44 96 45 00 59 94 60 00 74 25 HDTV 720P 6 1280 720 37 50 50 00 74 25 HDTV 720P 7 1920 1080 33 72 33 75 59 94 60 0 74 25 HDTV 1080i 8 1920 1080 28 125 50 00 74 25 HDTV 1080i No Resolution H freq kHz V freq kHz Pixel clo...

Page 8: ...DTV 1080P 8 1920 1080 56 25 50 148 5 HDTV 1080P 9 1920 1080 26 97 27 000 23 97 24 000 74 25 HDTV 1080P 10 1920 1080 33 71 33 75 29 97 30 000 74 25 HDTV 1080P PC 11 720 400 31 468 70 08 28 321 12 640 480 31 469 59 94 25 17 VESAVGA 13 640 480 37 500 75 00 31 50 VESA VGA 14 800 600 37 879 60 31 40 00 VESA SVGA 15 800 600 46 875 75 00 49 50 VESA SVGA 16 1024 768 48 363 60 00 65 00 VESA XGA 17 1024 768...

Page 9: ...put level will accurately have to be revised with 0 7 0 1VP P 4 3 Adjustment 1 How to adjustment the Component1 1 Select Component1 as the input with Color Bar Pattern in 480i 60Hz mode and select Component1 on screen 2 After receiving signal for at least 1 second press the ADJ Key on the Service R C to enter the Ez Adjust and select the 1 ADC 480i Comp1 Pressing the Vol Key to adjust the componen...

Page 10: ... 4C 25 4E 00 31 40 45 40 61 40 D1 C0 01 01 30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88 40 35 00 BC 88 21 00 00 18 00 00 00 00 00 00 00 00 50 00 00 00 00 00 00 00 00 00 00 00 00 00 FD 00 38 60 4B 1F 44 0F 00 0A 20 20 20 20 20 20 00 00 00 FC 70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 97 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 02 03 1D F1 4E 20 22 10 1F 01 02 03 04 05 12 93 10 14 07 16 23 15 07...

Page 11: ...libration of the CA 210 O Manual adjustment is also possible by the following sequence 1 Enter to 7 White Balance by pressing the ADJ key on the service remote control 2 Select Test Pattern White with ADJ key and HEAT RUN at least 15minutes 3 Select picture control condition to Dynamic Stick the sensor on center of screen And select 6 White Balance of Ez Adjust with ADJ key on service remote contr...

Page 12: ...MEMO 19 ...

Page 13: ...n t the high tension output come out Doesn t the VSC signal Vs ON come out Yes Yes Does high tension output voltage Drop occur When the Y B D Module input connector is removed does output voltage drop occur When the Y Z B D Module input connector is remove does Power Board high tension output voltage Drop occur Yes No No 9 Check the Power Board Output high tension circuit Yes 10 Check the Z B D Mo...

Page 14: ...ed continuously 2 Check following Is the LVDS cable normal Is the VSC Board normal Is the LVDS cable connected well Cable inserts well Yes No No Yes Does the Thine IC IC900 Operates Replace Thine IC900 No Is the Ctrl Board of Module normal Replace Ctrl B D No No Replace Scaler IC401 No Does the Scaler IC401 Operates Replace VSC Digital B D Replace the cable Yes Yes Yes ...

Page 15: ...ormal Is the Splitter normal Is the Flat Cables normal Replace Flat Cables Is the Tuner Cable connected well Cable inserts well Yes No No Yes Is the CXA2069Q IC100 normal Replace the Tuner No Is the Input voltage IIC Communication and CVBS output normal No Is normal the Input voltage IIC Communication and HV sync No Replace the IC No Yes Is the uPD64015 normal Is normal the Input voltage IIC Commu...

Page 16: ...ormal the Input voltage IIC Communication and HV sync Is the EDID correct Yes Is the latest version the Graphic card driver of the PC Update the Graphic card driver with the latest version No No Is normal the Input voltage IIC Communication and HV sync Yes Is the Scaler normal No Replace the IC Cable connected well No Is the Tuner Cable connected well No Is normal the Input voltage IIC Communicati...

Page 17: ...the IC200 Replace SPK cable Yes Yes Yes Is the RF Analog AV Component L R sound normal Is the CS5330A IC1000 MC33078 IC1001 Scaler IC401 normal No No Is the MSP4450K IC200 normal Replace the IC400 Yes Is the NSP2100 IC400 normal Replace the IC402 Yes Is the TAS5122 IC402 normal Replace the IC400 Yes Yes No No No No Is the Scaler IC401 normal Replace VSC Digital B D Yes Yes Replace the IC No Is the...

Page 18: ...DIF_IN_BYPASS 8 8 2 RX 0 2 RXC DDC I2C EEPROM AT24C02N 3 3 YCb Cr Vid eo SW CXA2181Q RGB DTV PC 5 RGBHV Co m p _1 YCb Cr 3 3 Co m p _2 YCb Cr 3 3 EPLD1 XC95144XL DVI_H V DE FID 3 3 OR 3 IIC3 SIF PAL Tuner Ext A L R 2 2 CXA2069 Co m p _1 2 2 L R Co m p _2 2 2 L R So und Pro c MSP4450 I2S Out 3 3 HD II HD II I2S_In MNT_Out L R 2 2 RGB Pho ne 2 2 L R Aud io ADC CS5331 PWM MODULATOR NSP2100A I2S PWM A...

Page 19: ...MEMO 12 ...

Page 20: ... 20 EXPLODED VIEW 300 301 200 201 532 531 530 120 590 202 581 204 203 205 601 600 430 402 401 403 431 580 520 400 206 521 ...

Page 21: ...ver Assembly Rear 26LC7D AB LB73A 26 FOR AU 401 MCK36577102 Cover MOLD HIPS 26LC7D AB HIPS 51SF REAR A V EVER3 FOR AU 402 MCK34645301 Cover Rear MOLD HIPS 51SF 26LC3R 27LC7R ABS stand rear cover HIPS 51SF 403 MGJ32425801 Plate PRESS EGI T1 6 METAL HGI 430 AAN32698601 Base Assembly STAND 26LC7D LA73E STAND BASE ASSY HI GLOSSY ABS XG569 520 EBU36575501 Main Total Assembly 26LC7D AA BRAND LB73A 521 M...

Page 22: ...0G 55TO 125C C1109 0CC560BK41A C1005C0G1H560JT 56pF 5 50V C0G 55TO 125C C111 0CK104BF56A C1005X7R104KET 100nF 10 16V X7R 55TO 125 C1110 0CC560BK41A C1005C0G1H560JT 56pF 5 50V C0G 55TO 125C C1113 0CE335WK6D8 MVK4 0TP50VC3 3M 3 3uF 20 50V 14MA 40TO C1115 0CK103BH56A C1005X7R1E103KT 10nF 10 25V X7R 55TO 12 C1119 0CE226WF6DC MVK5 0TP16VC22M 22uF 20 16V 30MA 40TO 10 C112 0CK104BF56A C1005X7R104KET 100n...

Page 23: ...C1307 0CK104BF56A C1005X7R104KET 100nF 10 16V X7R 55TO 125 C1308 0CK104BF56A C1005X7R104KET 100nF 10 16V X7R 55TO 125 C1309 0CK104BF56A C1005X7R104KET 100nF 10 16V X7R 55TO 125 C1310 0CE107WF6DC MVK6 3TP16VC100M 100uF 20 16V 80MA 40TO C1311 0CH5470K618 0402N470M500LT 47pF 5 50V C0G 55TO 125C C1312 0CE226WF6DC MVK5 0TP16VC22M 22uF 20 16V 30MA 40TO 10 C1313 0CE226WF6DC MVK5 0TP16VC22M 22uF 20 16V 30...

Page 24: ...C326 EAE32166101 CS1005XR473K250CR 0 047uF 10 25V X7R 55T C327 0CK334CF56A C1608X7R1C334KT 330nF 10 16V X7R 55TO 12 C328 0CK104BF56A C1005X7R104KET 100nF 10 16V X7R 55TO 125 C329 0CK334CF56A C1608X7R1C334KT 330nF 10 16V X7R 55TO 12 C330 0CK334CF56A C1608X7R1C334KT 330nF 10 16V X7R 55TO 12 C331 0CE106WFKDC MVK4 0TP16VC10M 10uF 20 16V 16MA 40TO 10 C332 0CK104BF56A C1005X7R104KET 100nF 10 16V X7R 55T...

Page 25: ... 40TO 85 C490 EAE30840401 25SVPD10M 10uF 20 25V 1 5A 55TO 125C SVP C491 0CE476WH6DC MVK8 0TP25VC47M 47uF 20 25V 80MA 40TO 85 C491 EAE30840401 25SVPD10M 10uF 20 25V 1 5A 55TO 125C SVP C492 0CK104BF56A C1005X7R104KET 100nF 10 16V X7R 55TO 125 C5 0CE476VF6DC VGV476M016S0ANE010 47uF 20 16V 70MA 40TO C500 0CK104BF56A C1005X7R104KET 100nF 10 16V X7R 55TO 125 C500 EAE33970001 CS1005X5R105K6R3NR 1uF 10 6 ...

Page 26: ...C658 0CE105WK6DC MVK4 0TP50VC1M 1uF 20 50V 5 6MA 40TO 105 C658 0CK105CF94A 0603F105Z160CT 1uF 20TO 80 16V Y5V 30TO C659 0CE105WK6DC MVK4 0TP50VC1M 1uF 20 50V 5 6MA 40TO 105 C659 0CK105CF94A 0603F105Z160CT 1uF 20TO 80 16V Y5V 30TO C660 0CE105WK6DC MVK4 0TP50VC1M 1uF 20 50V 5 6MA 40TO 105 C660 0CK105CF94A 0603F105Z160CT 1uF 20TO 80 16V Y5V 30TO C661 0CK101BK4EA C1005C0G1H101JT 100pF 5 50V C0G 55TO 1...

Page 27: ...5C C829 0CK103BH56A C1005X7R1E103KT 10nF 10 25V X7R 55TO 12 C830 0CK103BH56A C1005X7R1E103KT 10nF 10 25V X7R 55TO 12 C831 0CK102BK56A 0402B102K500CT 1nF 10 50V X7R 55TO 125C C831 0CK102BK56A 0402B102K500CT 1nF 10 50V X7R 55TO 125C C832 0CK106EF56A C3216X7R1C106KT 10uF 10 16V X7R 55TO 125 C833 0CK102BK56A 0402B102K500CT 1nF 10 50V X7R 55TO 125C C834 0CE227SF6DC MVG6 3TP16VC220M 220uF 20 16V 130MA 4...

Page 28: ...0 0DD184009AA KDS184 KDS184 TP KEC 85V 300MA KEC D300 0DD184009AA KDS184 KDS184 TP KEC 85V 300MA KEC D301 0DD184009AA KDS184 KDS184 TP KEC 85V 300MA KEC D602 0DD184009AA KDS184 KDS184 TP KEC 85V 300MA KEC D603 0DD184009AA KDS184 KDS184 TP KEC 85V 300MA KEC D702 0DD184009AA KDS184 KDS184 TP KEC 85V 300MA KEC D704 0DD184009AA KDS184 KDS184 TP KEC 85V 300MA KEC D800 0DS226009AA KDS226 1 2V 85V 300MA ...

Page 29: ...35 4 0TO5 5V 5NSEC 5NSEC 0W TSSOP R IC800 0IMCRSH001A PQ05DZ1U 6TO16V 5V 8W D2PAK R TP 5P SHARP IC801 0IPMG00049A AZ1117H 1 8TR E1 H13A 3 2TO10V 1 8V 0W SO IC801 0IPMG00049A AZ1117H 1 8TR E1 H13A 3 2TO10V 1 8V 0W SO IC802 0IPMGA0010A AZ1117H 3 3 4 75TO10V 3 3V 0W SOT223 R TP IC802 0IPMGA0010A AZ1117H 3 3 4 75TO10V 3 3V 0W SOT223 R TP IC900 0ISA721700C LA7217M 4 5VTO5 5V 16 1KHZ 150MW 0F MFP R IC90...

Page 30: ...03 0RJ0222C692 MNR04 M0APJ 220 22OHM 5 1 16W 1005X4 R TP AR703 EBC32260405 MNR04M0APJ680 68OHM 5 1 16W 4 SMD R TP 8P AR704 0RJ0222C692 MNR04 M0APJ 220 22OHM 5 1 16W 1005X4 R TP AR704 EBC32260405 MNR04M0APJ680 68OHM 5 1 16W 4 SMD R TP 8P AR705 0RJ0222C692 MNR04 M0APJ 220 22OHM 5 1 16W 1005X4 R TP AR705 EBC32260405 MNR04M0APJ680 68OHM 5 1 16W 4 SMD R TP 8P AR706 0RJ0222C692 MNR04 M0APJ 220 22OHM 5 1...

Page 31: ...OHM 5 1 16W 1005 R TP R R1150 0RJ4701C678 MCR01MZPJ472 4 7KOHM 5 1 16W 1005 R TP R R1151 0RJ2201C678 MCR01MZPJ222 2 2KOHM 5 1 16W 1005 R TP R R1152 0RJ2201C678 MCR01MZPJ222 2 2KOHM 5 1 16W 1005 R TP R R1153 0RJ0000C678 MCR01MZPJ000 0OHM 5 1 16W 1005 R TP ROHM R1154 0RJ0000C678 MCR01MZPJ000 0OHM 5 1 16W 1005 R TP ROHM R1155 0RJ0000C678 MCR01MZPJ000 0OHM 5 1 16W 1005 R TP ROHM R1156 0RJ0000C678 MCR0...

Page 32: ... 1005 R TP R R1426 0RJ0222C678 MCR01MZPJ220 22OHM 5 1 16W 1005 R TP R R1427 0RJ0222C678 MCR01MZPJ220 22OHM 5 1 16W 1005 R TP R R1428 0RJ0222C678 MCR01MZPJ220 22OHM 5 1 16W 1005 R TP R R143 0RJ0000C678 MCR01MZPJ000 0OHM 5 1 16W 1005 R TP ROHM R1430 0RJ0222C678 MCR01MZPJ220 22OHM 5 1 16W 1005 R TP R R1431 0RJ0222C678 MCR01MZPJ220 22OHM 5 1 16W 1005 R TP R R1432 0RJ1000C678 MCR01MZPJ101 100OHM 5 1 16...

Page 33: ...ZPJ474 470KOHM 5 1 16W 1005 R TP R2614 0RJ0000C678 MCR01MZPJ000 0OHM 5 1 16W 1005 R TP ROHM R2616 0RJ0000C678 MCR01MZPJ000 0OHM 5 1 16W 1005 R TP ROHM R2619 0RJ0000C678 MCR01MZPJ000 0OHM 5 1 16W 1005 R TP ROHM R2621 0RJ1501C678 MCR01MZPJ152 1 5KOHM 5 1 16W 1005 R TP R R2623 0RJ1501C678 MCR01MZPJ152 1 5KOHM 5 1 16W 1005 R TP R R2624 0RJ0000C678 MCR01MZPJ000 0OHM 5 1 16W 1005 R TP ROHM R2626 0RJ1000...

Page 34: ...TP R R3086 0RJ0222C678 MCR01MZPJ220 22OHM 5 1 16W 1005 R TP R R3087 0RJ0222C678 MCR01MZPJ220 22OHM 5 1 16W 1005 R TP R R3088 0RJ0222C678 MCR01MZPJ220 22OHM 5 1 16W 1005 R TP R R3089 0RJ0222C678 MCR01MZPJ220 22OHM 5 1 16W 1005 R TP R R3090 0RJ0222C678 MCR01MZPJ220 22OHM 5 1 16W 1005 R TP R R3091 0RJ0222C678 MCR01MZPJ220 22OHM 5 1 16W 1005 R TP R R3092 0RJ0222C678 MCR01MZPJ220 22OHM 5 1 16W 1005 R T...

Page 35: ...8 0RJ0272C678 MCR01MZPJ270 27OHM 5 1 16W 1005 R TP ROH R519 0RJ0272C678 MCR01MZPJ270 27OHM 5 1 16W 1005 R TP ROH R522 0RJ2202C678 MCR01MZPJ223 22KOHM 5 1 16W 1005 R TP R524 0RJ4701C678 MCR01MZPJ472 4 7KOHM 5 1 16W 1005 R TP R R527 0RJ0000C678 MCR01MZPJ000 0OHM 5 1 16W 1005 R TP ROHM R529 0RJ0000C678 MCR01MZPJ000 0OHM 5 1 16W 1005 R TP ROHM R530 0RJ0000C678 MCR01MZPJ000 0OHM 5 1 16W 1005 R TP ROHM ...

Page 36: ...R TP ROH R724 0RJ0332C678 MCR01MZPJ330 33OHM 5 1 16W 1005 R TP ROH R725 0RJ0222C678 MCR01MZPJ220 22OHM 5 1 16W 1005 R TP R R726 0RJ0222C678 MCR01MZPJ220 22OHM 5 1 16W 1005 R TP R R727 0RJ0332C678 MCR01MZPJ330 33OHM 5 1 16W 1005 R TP ROH R728 0RJ0332C678 MCR01MZPJ330 33OHM 5 1 16W 1005 R TP ROH R729 0RJ0332C678 MCR01MZPJ330 33OHM 5 1 16W 1005 R TP ROH R731 0RJ3900C678 MCR01MZP5J391 390OHM 5 1 16W 1...

Page 37: ...473 47KOHM 5 1 16W 1005 R TP RO R928 0RJ5600C678 MCR01MZPJ561 560OHM 5 1 16W 1005 R TP RO R929 0RJ0472C678 MCR01MZPJ470 47OHM 5 1 16W 1005 R TP R R934 0RJ3901C678 MCR01MZPJ392 3 9KOHM 5 1 16W 1005 R TP R935 0RJ1001C678 MCR01MZPJ102 1KOHM 5 1 16W 1005 R TP ROH R936 0RJ1001C678 MCR01MZPJ102 1KOHM 5 1 16W 1005 R TP ROH R937 0RJ1001C678 MCR01MZPJ102 1KOHM 5 1 16W 1005 R TP ROH R940 0RJ1001C678 MCR01MZ...

Page 38: ...2 120OHM L300 0LCML00003B Filter Bead MLB 201209 0120P N2 120OHM L301 0LCML00003B Filter Bead MLB 201209 0120P N2 120OHM L400 0LCML00003B Filter Bead MLB 201209 0120P N2 120OHM L401 0LCML00003B Filter Bead MLB 201209 0120P N2 120OHM L402 0LCML00003B Filter Bead MLB 201209 0120P N2 120OHM L403 0LCML00003B Filter Bead MLB 201209 0120P N2 120OHM L404 0LCML00003B Filter Bead MLB 201209 0120P N2 120OHM...

Page 39: ...C STRAIGHT BK YELLOW J700 6612B00015B DC1R019WDH SOCKET 21P STRAIGHT SMD R TP J701 6612B00015B DC1R019WDH SOCKET 21P STRAIGHT SMD R TP J800 6612J10025A KCN BT 0 0055 4P PAL RCA ANGLE DIP TR RC EAG32151101 TOX177L F T 3P TX 2 54MM ANGLE 15BPS DIP IC1 6712000013A Receiver Module TSOP4438SO1 4 5TO5 5V 1 5MA IC1402 SAA30679402 S W Firmware 2 00 0 3FC2 AUSTRALIA FLASH ROM IC200 SAA30679204 S W Firmware...

Page 40: ...16 DACCLFCH DACCLFCH P1 P1 AVSSIO_PLL AVSSIO_PLL AB2 AB2 HOSTREADY HOSTREADY A7 A7 EXT_DB9 EXT_DB9 AD22 AD22 SDRAMADDR1 SDRAMADDR1 H25 H25 VDDCORE24 VDDCORE24 U10 U10 VDDCORE12 VDDCORE12 M9 M9 SDRAMDQ23 SDRAMDQ23 L24 L24 SDRAMDQ29 SDRAMDQ29 J25 J25 CHA D1_4 CHA D1_4 B14 B14 VSSCORE27 VSSCORE27 R13 R13 VDDIO7 VDDIO7 M4 M4 VSSIO19 VSSIO19 V14 V14 DOUT_R9 DOUT_R9 AF15 AF15 DACSELLRCH DACSELLRCH N3 N3...

Page 41: ...RAM_1 3 3VDD_SDRAM_1 3 3V 3 3VDD_SDRAM_1 3 3VDD_SDRAM_1 MLB 201209 0120P N2 L503 10uF 16V C528 10uF 16V C525 10uF 16V C510 3 3V MLB 201209 0120P N2 L504 3 3VDD_SDRAM_1 27MHz X500 6 1 25 34 0 1uF 16V C538 0 1uF C545 0 1uF 16V C540 0 1uF 16V C543 0 1uF 16V C532 0 1uF 16V C542 0 1uF 16V C533 0 01uF C544 0 01uF C546 0 01uF C539 1 16W 27 5 R508 1 16W 27 5 R518 1 16W 27 5 R509 1 16W 27 5 R519 22K R522 4...

Page 42: ...C1010 10uF 25V C1016 10uF 25V C1003 10uF 25V C1005 68 AR1006 68 AR1005 68 AR1004 68 AR1003 68 AR1002 68 AR1001 68 AR1000 68 R1006 68 R1002 68 R1007 68 R1005 0 1uF 16V C1025 XDR_DATA_R 3 XDR_DATA_G 5 XDR_DATA_G 7 XDR_DATA_R 0 XDR_DATA_B 9 XDR_DATA_B 3 XDR_DATA_R 8 XDR_DATA_B 0 XDR_DATA_R 1 XDR_DATA_R 9 XDR_DATA_G 3 XDR_DATA_R 5 XDR_DATA_G 2 XDR_DATA_B 4 XDR_DATA_G 9 XDR_DATA_G 8 XDR_DATA_G 6 XDR_DA...

Page 43: ...Apr 2007 Printed in Korea P NO MFL37744301 ...

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