LG RT-23LZ55 Page 15 Service Manual Download | Manualshive

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TROUBLESHOOTING

No power
(LED indicator off)

Check short of main B/D
or Change Power B/D

Change IC1300,IC4 or IC8

Change LED Assy

Change L808,L809

(F801,F802)

Check 24V or 12V

of Power B/D

Check Output of

IC1300, IC4 or IC8

Check LED Assy

Check P101 Connector

Fail

Fail

Fail

Change L3, L1300

Check Output of

L3, L1300

Fail

Pass

Fail

Pass

Pass

Pass

:[A]Process

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Summary of Contents for RT-23LZ55

Page 1: ...ERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS ML 041A MODEL RT 23LZ55 RZ 23LZ55 website http biz LGservice com e mail http www LGEservice com techsup html ...

Page 2: ...NTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 10 TROUBLE SHOOTING 15 BLOCK DIAGRAM 20 WIRING DIAGRAM 23 EXPLODED VIEW 24 EXPLODED VIEW PARTS LIST 25 REPLACEMENT PARTS LIST 27 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: ...ion Remark 1 Video input applicable system PAL D K B G I NTSC M SECAM NTSC 4 43 2 Receivable Broadcasting System 1 PAL SECAM BG RZ RT 2 PAL SECAM DK EU Non EU 3 PAL I I PAL Market 4 SECAM L L 5 NTSC M 6 PAL N M 6 7 South America Market 7 NTSC M 7 Except South America NTSC Market RM 3 RF Input Channel VHF E2 E12 UHF E21 E69 PAL CATV S1 S20 HYPER S21 S41 L L B C D FRANCE VHF 2 13 UHF 14 69 NTSC CATV...

Page 7: ... 13 Line3 Ready D4 Jack 2 Y GND 525i 525p 750p 1125i 4 Pb GND 6 Pr GND 8 LINE1 JAPAN Only 10 Line2 Ready 12 SWITCH GND 14 SWITCH 7 H V Sync Video Power consumption LED Power ON ON ON Active max 170W W Green Stand by OFF ON OFF 3 0W W Red DPMS Mode ON OFF OFF typ 30W W Green Power off W 8 LCD Module Type Size LPL 559 8 x 333 8 x 45 7 mm H x V x D Pixel Pitch LPL 0 372 x 0 124 x RGB mm Pixel Format ...

Page 8: ...t TOP FLOF LIST 10 page Top option 2 REMOCON NEC Code PAL NTSC 3 AV Input 1 Rear RT RM 4 S AV Input 1 Side 5 Component input 2 Side Rear RT RM 1 Side RZ HD 6 PERI TV Connector Half SCART 1 Rear RZ 7 PERI TV Connector Full SCART 1 Rear RZ 8 RGB Input 1 DVI 9 RS 232 1 D sub 9 pin RM 10 Discrete IR 1 RM 11 D Sub Audio Input 1 Stereo 12 2 Carrier Stereo BG DK 13 NICAM Stereo BG I LL 14 2 Carrier Dual ...

Page 9: ...0 37 5 50 00 HDTV 720p 50HZ RT RZ 9 1920x1080 31 25 28 125 50 00 HDTV 1080i 50Hz Only AU RT RZ 10 1920x1080 33 75 60 00 HDTV 1080i 60Hz ATSC RT RM RZ 11 1920x1080 33 72 59 94 HDTV 1080i 59 94Hz RT RM RZ No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed DVI PC Analog RGB Digital RGB 1 640x480 31 469 59 94 25 17 VESA VGA 2 800x600 37 879 60 31 40 00 VESA SVGA 3 1024x768 48 363 60 00 65 00 ...

Page 10: ...e DVI I Jack of LCD TV 3 3 2 Auto Gain Offset Adjustment Input signal Level 730mV To use Pattern Generator MSPG925FS Apply Model 37 Patten 19 XGA 1024 X 768 60Hz white black top and bottom pattern signal Don t apply 16 gray signal Press IN START Key by using the Remote Controller SVC after converting to Adjustment Mode press VOL Key consecutively in Auto Gain Menu After adjustment is complete pres...

Page 11: ... G changing R and B If it is not adjusted adjust with fixed B changing G and R 3 7 Component signal Gain Offset Adjustment Auto adjustment RT 23LZ55 Execution of RF no signal during Heat Run over 30min Connect to the LCD TV Component1 terminal with Patten Generator MSPG 925FS Convert INPUT MODE to Component1 Connect RS 232C Communication Cable to the Auto Adjustment Equipment and SET s upgrade Por...

Page 12: ...t 00 FF FF FF FF FF FF 00 1E 6D 07 56 01 01 01 01 00 0E 01 03 01 40 26 78 08 B1 DA A1 56 48 98 24 13 48 4B A1 08 00 31 40 01 01 01 01 45 40 01 01 61 40 81 80 01 01 4E 1F 00 90 51 00 1B 30 40 88 13 00 A2 0B 32 00 00 18 1B 21 50 A0 51 00 1E 30 48 88 35 00 A2 0B 32 00 00 1C 00 00 00 FD 00 3B 3D 1F 30 09 00 0A 20 20 20 20 20 20 00 00 00 FC 00 52 54 32 33 4C 5A 35 35 0A 20 20 20 20 00 3E 00 FF FF FF FF...

Page 13: ...otel On 3 Top 1 0 Top OFF 1 Top ON 4 I II SAVE 1 0 Ch Sound Non Memory 1 Ch Sound Memory 5 Turbo Vol 0 0 except below area Off 1 Middle East Area Vol On 6 Ch Aus 0 0 except below area Off 1 China Australia On Option3 1 Language 1 0 Eng Only 1 EU5 2 12 nations Europe 3 Eng Chinese 4 Eng Arab Urdu 5 Eng FARSI 2 Txt Lang 0 0 WEST EU 1 EAST EU1 2 TURKY EU 3 EAST EU2 4 CYRILLIC1 5 CYRILLIC2 6 CYRILLIC3...

Page 14: ...put To check 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 ...

Page 15: ...ange Power B D Change IC1300 IC4 or IC8 Change LED Assy Change L808 L809 F801 F802 Check 24V or 12V of Power B D Check Output of IC1300 IC4 or IC8 Check LED Assy Check P101 Connector Fail Fail Fail Change L3 L1300 Check Output of L3 L1300 Fail Pass Fail Pass Pass Pass A Process ...

Page 16: ...ck 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 Faill Change module Fail Check panel link Cable or module Pass Pass Pass Pass Pass B Process ...

Page 17: ... Process 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 Fail Re soldering or Change the defect part Faill Pass Pass Pass Check the input output of IC500 IC600 Re soldering or Change the defect part Fail Pass ...

Page 18: ...f TU1000 Check the input output of IC1 Check the input output of IC500 IC600 Check input source cable and jack Fail Fail Fail Faill Re soldering or Change the defect part Fail 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 Re soldering or Change the defect part Pass Pass ...

Page 19: ...e input Check the input source Fail Pass Re soldering or Change the defect part 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 20: ...BLOCK DIAGRAM RZ 23LZ55 20 ...

Page 21: ... 21 BLOCK DIAGRAM RT 23LZ55 ...

Page 22: ... it Scaler is reponsible for regulating the timing of signal to LCD panel and size and location of the signal Graphic control accepts the PC Analog RGB and DVI D Digital signal Scalar is reponsible for regulating the timing of signal to LCD panel and size and location of the signal Graphic control accepts the PC Analog RGB and DVI D Digital signal the signal of PC input is connected to analog port...

Page 23: ...ARD 1 2 3 4 5 6 7 8 9 10 11 WIRING DIAGRAM No Part No 1 2 3 4 5 6 7 8 9 10 11 Wiring Part List 6631T11020N 6631T20033F 6631T20034Y 6631T25019K 6631T20033A 6631T20033T 6631T20033D 6631T20029Z 6631T20029Y 6631T20033E 6631T20034Z 23 ...

Page 24: ... 24 EXPLODED VIEW 010 020 070 100 110 120 130 140 150 160 190 090 080 030 040 050 060 170 180 ...

Page 25: ...RZ RT RM 23LZ50 WIDE LED P SW TOTAL BRAND LF 6871TST630B PWB PCB ASSEMBLY SUB RZ 23LZ50 KEY CONTROL TOTAL BRAND LF 4951TKS236E METAL ASSEMBLY FRAME MAIN 23LZ50S LPL SET 4951TKS236F METAL ASSEMBLY FRAME MAIN 23LZ50S LPL C SKD 6871TPT287E PWB PCB ASSEMBLY POWER RZ 23LZ50 POWER TOTAL BRAND AUTOBAHN 23 PB FREE or 6871TPT287J PWB PCB ASSEMBLY POWER RZ 23LZ50 POWER TOTAL BRAND DVD 23LX1RV 3313TP2024C MA...

Page 26: ...SEMBLY SUB RZ 23LZ50 KEY CONTROL TOTAL BRAND LF 4951TKS236E METAL ASSEMBLY FRAME MAIN 23LZ50S LPL SET 4951TKS236F METAL ASSEMBLY FRAME MAIN 23LZ50S LPL C SKD 6871TPT287J PWB PCB ASSEMBLY POWER RZ 23LZ50 POWER TOTAL BRAND DVD 23LX1RV or 6871TPT287E PWB PCB ASSEMBLY POWER RZ 23LZ50 POWER TOTAL BRAND AUTOBAHN 23 PB FREE 33139P2006A MAIN TOTAL ASSEMBLY RZ 23LZ55 SKD LPL BRAND ML 041A LF 6871TST632C PW...

Page 27: ...6 0 1UF 50V 10 X7R 2012 R TP C521 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C522 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C523 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C526 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C527 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C528 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C529 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C530 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C531 0CH3104K566 0 ...

Page 28: ...R 2012 R TP C915 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C916 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP DATE 2005 08 25 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C917 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C918 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C919 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C920 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C921 0CH3104K566 0 1UF 50V 10 X7R 2012 R TP C922 0CH3104K566 0...

Page 29: ...P C1303 0CH6101K416 100PF 50V 5 NP0 2012 R TP C1308 0CH6101K416 100PF 50V 5 NP0 2012 R TP C14 0CH6102K406 1000PF 50V 5 SL 2012 R TP C2 0CH6102K406 1000PF 50V 5 SL 2012 R TP C20 0CH6102K406 1000PF 50V 5 SL 2012 R TP DATE 2005 08 25 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C237 0CH6102K406 1000PF 50V 5 SL 2012 R TP C238 0CH6102K406 1000PF 50V 5 SL 2012 R TP C319 0CH6120K416 12PF 2012 50V 5 NP0 ...

Page 30: ...300 0CE107WF6DC 100UF MVK 16V 20 R TP SMD C301 0CE107WF6DC 100UF MVK 16V 20 R TP SMD C302 0CH8106F691 10UF 16V 20 105STD CYL R C303 0CH8106F691 10UF 16V 20 105STD CYL R C304 0CH8106F691 10UF 16V 20 105STD CYL R C307 0CH8106F691 10UF 16V 20 105STD CYL R C308 0CE107WF6DC 100UF MVK 16V 20 R TP SMD DATE 2005 08 25 S AL LOC NO PART NO DESCRIPTION SPECIFICATION C309 0CH8106F691 10UF 16V 20 105STD CYL R ...

Page 31: ...3PYTR BS33 AIC 3 DATE 2005 08 25 S AL LOC NO PART NO DESCRIPTION SPECIFICATION IC604 0IPMG78341A AZ1085S 3 3TR E1 LF BCD 3PI IC8 0IMCRFA015A KA7805R FAIRCHILD 2P D PAK IC905 0IPMGFA061A FAN1587AD33X FAIRCHILD 3P D IC906 0IPMGSG018D LD1086DT18TR LF SGS THOMSON IC103 0ISS780800J KA78M08R 3P D PAK TP VOL R IC200 0ISA722200A LA7222 1280 AUDIO IC2000 0ISTL00026A MC14066BDR2G LF ON SEMI 14P IC702 0ISTL0...

Page 32: ...0AA CHIP 2SC3875S ALY BK KEC Q901 0TR387500AA CHIP 2SC3875S ALY BK KEC IC1101 0TF492509AA SI4925DY TP TEMIC 30V 6 1A DATE 2005 08 25 S AL LOC NO PART NO DESCRIPTION SPECIFICATION IC902 0TF492509AA SI4925DY TP TEMIC 30V 6 1A RA600 0RRZVTA001A MNR 14 E0A J 101 R OHM 100 RA601 0RRZVTA001A MNR 14 E0A J 101 R OHM 100 RA602 0RRZVTA001A MNR 14 E0A J 101 R OHM 100 RA603 0RRZVTA001A MNR 14 E0A J 101 R OHM ...

Page 33: ...D R516 0RH0222D622 22 OHM 1 10 W 2012 5 00 R517 0RH0222D622 22 OHM 1 10 W 2012 5 00 R519 0RH0222D622 22 OHM 1 10 W 2012 5 00 DATE 2005 08 25 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R520 0RH1800D622 180 OHM 1 10 W 2012 5 00 R527 0RH4701D622 4 7K OHM 1 10 W 2012 5 00 R530 0RH0000D622 0 OHM 1 10 W 2012 5 00 D R532 0RH0222D622 22 OHM 1 10 W 2012 5 00 R607 0RH1000D622 100 OHM 1 10 W 2012 5 00 R61...

Page 34: ...O PART NO DESCRIPTION SPECIFICATION R224 0RJ4702D677 47000 OHM 1 10 W 5 1608 R RT 23LZ55 R225 0RJ1001D677 1K OHM 1 10 W 5 1608 R TP RT 23LZ55 R228 0RJ1001D677 1K OHM 1 10 W 5 1608 R TP RT 23LZ55 R231 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP RT 23LZ55 R234 0RJ0222D677 22 OHM 1 10 W 5 1608 R TP RT 23LZ55 R237 0RJ0682D677 68 OHM 1 10 W 5 1608 R TP RZ 23LZ55 R238 0RJ0222D677 22 OHM 1 10 W 5 1608 R TP RZ...

Page 35: ...HM 1 10 W 5 1608 R TP R601 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R602 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R603 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R604 0RJ0000D677 0 OHM 1 10 W 5 1608 R TP DATE 2005 08 25 S AL LOC NO PART NO DESCRIPTION SPECIFICATION R606 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R608 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R609 0RJ1000D677 100 OHM 1 10 W 5 1608 R TP R62 0RJ100...

Page 36: ... SUNNY 13 500000MHZ X900 6202VDT002B SX 1 SUNNY SC14 3MHZ 30 X4000 6202TTB001G HC 49U SUNNY 12 288MHZ 5 RZ 23LZ55 IC900 6620F00017A CCSD 32T SM WOOYOUNG 32P PL TU1000 6700VS0003E TAEW G053D LGIT MULTI VS PA L1700 0LA0102K119 10UH K 2 3 3 4 TP R1700 0RN8200F409 820 1 6W 1 TA52 R1701 0RN6200F409 620 1 6W 1 TA52 R1702 0RN5100F409 510 OHM 1 6 W 1 00 TA52 R1703 0RN4300F409 430 OHM 1 6 W 1 00 TA52 R1704...

Page 37: ......

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Page 39: ...Aug 2005 Printed in Korea P NO 38289S0004V ...

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