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LG 37LC5DCB Service Manual
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LG 37LC5DCB Service Manual

LG 37LC5DCB Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : LA64A
MODEL : 37LC5DCB
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
37LC5DCB-UA

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Summary of Contents for LG 37LC5DCB

  • Page 1: Service Manual

    LCD TV SERVICE MANUAL CHASSIS : LA64A MODEL : 37LC5DCB 37LC5DCB-UA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS CONTENTS ....................2 PRODUCT SAFETY ..................3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ...............12 TROUBLE SHOOTING ................18 BLOCK DIAGRAM...................24 EXPLODED VIEW .................. 25 REPLACEMENT PARTS LIST ............... 27 SVC. SHEET ....................- 2 -...

  • Page 3: Product Safety

    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 Shock, Fire, or other Hazards.

  • Page 4: Servicing Precautions

    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 5 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. When holes are the slotted type, the following technique board will weaken the adhesive that bonds the foil to the circuit should be used to remove and replace the IC.

  • Page 6: Specification

    37, 42 inch Wide Aspect Ratio 16:9 Tuning System LCD Module LC370WX3-SLD1 LG Philips LCD LC420WX6-SLD1 Operating Environment 1) Temp : 0 ~ 40 deg 2) Humidity : ~ 80 % Storage Environment 1) Temp. : -20 ~ 50 deg...
  • Page 7 5. Chroma & Brightness Item Unit Remark White brightness cd/m EZ Picture: Daylight, Color Temperature: Medium Color coordinate 0.602 0.632 0.662 Full Signal Swing (Default) 0.312 0.342 0.372 ± 0.025 GREEN 0.258 0.288 0.318 0.580 0.610 0.640 BLUE 0.117 0.147 0.177 0.035 0.065...
  • Page 8 7. RGB Input (PC/DTV) Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 640*350 31.469 70.08 25.17 640*480 31.469 59.94 25.17 VESA(VGA) 640*480 37.861 72.80 31.50 VESA(VGA) 640*480 37.500 75.00 31.50 VESA(VGA) 800*600 35.156 56.25 36.00 VESA(SVGA) 800*600 37.879 60.31 40.00 VESA(SVGA) 800*600 48.077 72.18 50.00...
  • Page 9 9. HDMI2 Input (DTV) Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 720*480 31.500 59.94 27.00 SDTV 480P 720*480 31.469 60.00 27.03 SDTV 480P 1280*720 44.96 59.94 HDTV 720P 1280*720 45.00 60.00 HDTV 720P 1920*1080 33.72 59.94 HDTV 1080I 1920*1080 33.75 60.00 HDTV 1080I 10.
  • Page 10 11. Electro Optical Characteristic Specifications (module standard) 11-1. 37LC5DC Item Unit Remark Contrast Ratio(CR) Surface Luminance, White Cd/m Full white Luminance Variation ( white/5P) Response Time Gray to Gray msec Color coordinate 0.636 Full Pattern -0.03 0.343 +0.03 GREEN 0.284 0.615 BLUE 0.144...
  • Page 11 12. Customer Menu Setup (Shipment Condition) Item Condition Remark Input Mode TV02CH Volume Level Mute Aspect Ratio 16:9 Video EZ Picture Daylight Color temperature (Disable) Can be access only EZ picture is setting user mode Auto Advanced Cinema: Off Reset Audio Audio Language EZ SoundRite...

  • Page 12: Adjustment Instruction

    ADJUSTMENT INSTRUCTION 1. Application Range 4. Method of PTC MICOM Download This spec sheet is applied all of the 'LA64A' Chassis. 4.1 Connection of MICOM JIG 2. Specification 2.1 Because this is not a hot chassis, it is not necessary to use an isolation transformer.
  • Page 13 1) Select HCS12 Before ADC Calibration, should be executed the "Module type 2) Target Frequency Settings : selection". A. Checking the factor -> Use Specified Target Frequency , Unsecure target . B. Insert Target Bus Frequency -> 7372800 6. Color Balance adjustment. 3) Specify Algorithm: 9S12dt128_128k .12P 4) Specify S Record: select download file.
  • Page 14 6.2 Auto Component Color Balance 6.3 Auto RGB Color Balance 6.2.1 Required Test Equipment 6.3.1 Required Test Equipment - Remote controller for adjustment - Remote controller for adjustment - 802F Pattern Generator Which has 720p YPbPr output - 802F Pattern Generator, Master (MSPG-925FS), etc. with Standard (0.7Vpp) See Fig.
  • Page 15 7. EDID / DDC INPUT 6.4 RF Color Balance 1) Input the RF cable(2 ch) 7.1 EDID(The Extended Display Identification Data) / 2) Set the EZ Pictures to Daylight mode in Video menu. DDC(Display Data Channel) download 3) Press INSTART key on R/C for adjustment. 4) Press the (Vol.
  • Page 16 7.1.3 Data of EDID for 32/37/42LC5DC-UA,32LX5DC-UA Before adjustment of white balance, should be executed the 7.1.3.1 DDC data of Analog-RGB 'color balance adjustment' 8. Adjustment of White Balance 8.1 Required Equipment - Remote controller for adjustment - Color Analyzer (CA-210 or same product ) - Auto W/B adjustment instrument(only for Auto adjustment) - Use inner(SELF) Pattern 8.2 Adjustment of White Balance (For Manual adjustment)
  • Page 17 9. Auto white Balance (AV) 10.2 Lodgenet Card & Auto Camport Check command1 command2 Set ID Data Default value Input Select x R-Gain G-Gain B-Gain R-Offset G-Offset j B-Offset 10. Test factor for commercial model 10.1 IR In/ Out Check 10.3 RJP(Remote Jack Pack) Check 10.1.1 Check Order 'Pass' Judgment 10.3.1 Check Order 'Pass' Judgment...

  • Page 18: Troubleshooting

    TROUBLESHOOTING - 18 -...
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  • Page 24: Block Diagram

    BLOCK DIAGRAM - 24 -...

  • Page 25: Exploded View

    EXPLODED VIEW - 25 -...

  • Page 26: Exploded View Parts List

    Speaker,Full Range, EN1562C-6712 ND 10W 8OHM 82DB 100HZ 193.5 X 42 X 39.9 LUG KOREA TOPTONE EAJ36548001 LCD,Module-TFT, LC370WX3-SLD1 WXGA 37INCH 1366X768 500CD COLOR 72% 16/9 900:1(DCR 5000:1) 6ms(GTG), Zero RT Pol. 10000K LG PHILIPS LCD ABJ32333302 Cabinet Assembly, 37LB5DC-UA LA64A 37" COMMERCIAL ACQ32494201 Cover Assembly, 37LC5DC-UA LA64A 37"...

  • Page 27: Replacement Parts List

    0CE476WH6DC "Capacitor,AL,Chip" MVK8.0TP25VC47M 47uF 2 MFL34797007 "Manual,Owners" PRINTING USER LA64A BR C1307 0CE476WH6DC "Capacitor,AL,Chip" MVK8.0TP25VC47M 47uF 2 MFL34797025 "Manual,Owners" PRINTING USER LA64A LG C1308 0CE476WH6DC "Capacitor,AL,Chip" MVK8.0TP25VC47M 47uF 2 MKJ32022820 Remote Controller COMPLEX LA64A 37LC5 37 C1534 0CE226WF6DC "Capacitor,AL,Chip" MVK5.0TP16VC22M 22uF 2...
  • Page 28 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C706 0CE107WF6DC "Capacitor,AL,Chip" MVK6.3TP16VC100M 100uF C1132 0CK103CK56A "Capacitor,Ceramic,Chip" 0603B103K500CT 10nF 10 C707 0CE107WF6DC "Capacitor,AL,Chip" MVK6.3TP16VC100M 100uF C1133 0CK104CF56A "Capacitor,Ceramic,Chip" 0603B104K160CT 100nF 1 C708 0CE107WF6DC "Capacitor,AL,Chip" MVK6.3TP16VC100M 100uF C1134 0CK104CF56A "Capacitor,Ceramic,Chip"...
  • Page 29 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C1202 0CC470CK41A "Capacitor,Ceramic,Chip" C1608C0G1H470JT 47pF 5 C134 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C1203 0CC470CK41A "Capacitor,Ceramic,Chip" C1608C0G1H470JT 47pF 5 C135 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C1204 0CK105CD56A "Capacitor,Ceramic,Chip"...
  • Page 30 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C202 0CK103CK56A "Capacitor,Ceramic,Chip" 0603B103K500CT 10nF 10 C340 0CK102CK56A "Capacitor,Ceramic,Chip" 0603B102K500CT 1nF 10% C204 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C341 0CK102CK56A "Capacitor,Ceramic,Chip" 0603B102K500CT 1nF 10% C205 0CK104CK56A "Capacitor,Ceramic,Chip"...
  • Page 31 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C423 0CK224DH56A "Capacitor,Ceramic,Chip" 0805B224K250CT 220nF 1 C494 0CC102CK41A "Capacitor,Ceramic,Chip" C1608C0G1H102JT 1nF 5% C424 0CK224DH56A "Capacitor,Ceramic,Chip" 0805B224K250CT 220nF 1 C494 0CK102CK56A "Capacitor,Ceramic,Chip" 0603B102K500CT 1nF 10% C425 0CK224DH56A "Capacitor,Ceramic,Chip"...
  • Page 32 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C556 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C614 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C557 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C615 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C558 0CK104CK56A "Capacitor,Ceramic,Chip"...
  • Page 33 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C734 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C823 0CK103CK56A "Capacitor,Ceramic,Chip" 0603B103K500CT 10nF 10 C735 0CK104CK56A "Capacitor,Ceramic,Chip" 0603B104K500CT 100nF 1 C824 0CK103CK56A "Capacitor,Ceramic,Chip" 0603B103K500CT 10nF 10 C736 0CK104CK56A "Capacitor,Ceramic,Chip"...
  • Page 34 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C893 0CK104CF56A "Capacitor,Ceramic,Chip" 0603B104K160CT 100nF 1 CC707 0CK103BH56A "Capacitor,Ceramic,Chip" C1005X7R1E103KT- 10nF C894 0CK104CF56A "Capacitor,Ceramic,Chip" 0603B104K160CT 100nF 1 CC708 0CK103BH56A "Capacitor,Ceramic,Chip" C1005X7R1E103KT- 10nF C895 0CK104CF56A "Capacitor,Ceramic,Chip" 0603B104K160CT 100nF 1 CC709 0CK103BH56A "Capacitor,Ceramic,Chip"...
  • Page 35 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION D401 0DS181009AA "Diode,Switching" KDS181 1.2V 85V 300MA ZZD1300 0DZRM00178A "Diode,Zener" UDZS5.1B 5.1V 4.98TO5. D402 0DS181009AA "Diode,Switching" KDS181 1.2V 85V 300MA ZZD1301 0DZRM00178A "Diode,Zener" UDZS5.1B 5.1V 4.98TO5. D403 0DS181009AA "Diode,Switching"...
  • Page 36 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION IC506 0IPRP00692C "IC,Video Processors" FLI8662-LF-BC-XD 1.8VT FB406 6210TCE001G "Filter,Bead" HH-1M3216-501JT 500OHM IC702 0ILNR00070A "IC,Video Processors" BCM7411HKPBG 1.8VTO3.3 FB407 6210TCE001G "Filter,Bead" HH-1M3216-501JT 500OHM IC803 EAN32123602 "IC,Video Processors" LGDT1111B 3.135VTO3.46 FB408 6210TCE001G "Filter,Bead"...
  • Page 37 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L800 6210TCE001G "Filter,Bead" HH-1M3216-501JT 500OHM Q304 0TR830009BA FET BSS83 N-CHANNEL MOSFET LL1100 6210TCE001G "Filter,Bead" HH-1M3216-501JT 500OHM Q305 0TR830009BA FET BSS83 N-CHANNEL MOSFET L1102 EAM33010401 "Filter,LCR" MEM2012P25R0 EMI 25MHZ Q508 0TR830009BA FET BSS83 N-CHANNEL MOSFET...
  • Page 38 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION RESISTORs AR802 0RJ0222C687 "Resistor,Array" RCA86TRJ22R0 22OHM 5% AR803 0RJ0222C687 "Resistor,Array" RCA86TRJ22R0 22OHM 5% AR300 0RZZH033273 "Resistor,Array" MNR04M0ABJ330 33OHM 5% AR900 0RJ0222C687 "Resistor,Array" RCA86TRJ22R0 22OHM 5% AR300 EBC32260601 "Resistor,Array"...
  • Page 39 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1015 0RJ0332D677 "Resistor,Chip" MCR03EZPJ330 33OHM 5% R1072 0RJ0222D677 "Resistor,Chip" MCR03EZPJ220 22OHM 5% R102 0RH1101D622 "Resistor,Chip" MCR10EZHJ112 1.1KOHM 5 R1074 0RJ0222D677 "Resistor,Chip" MCR03EZPJ220 22OHM 5% R102 0RH1201D622 "Resistor,Chip"...
  • Page 40 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R114 0RH1002D622 "Resistor,Chip" MCR10EZHJ103 10KOHM 5% R1227 0RJ1201D677 "Resistor,Chip" MCR03EZPJ122 1.2KOHM 5 R1140 0RJ0101D677 "Resistor,Chip" MCR03EZPJ1R0 1OHM 5% 1 R1228 0RJ0102D677 "Resistor,Chip" MCR03EZPJ100 10OHM 5% R1140 0RJ0101D677 "Resistor,Chip"...
  • Page 41 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1276 0RJ1002D477 "Resistor,Chip" MCR03EZPF103 10KOHM 1% R1340 0RJ1000D677 "Resistor,Chip" MCR03EZPJ101 100OHM 5% R1277 0RJ0000D677 "Resistor,Chip" MCR03EZPJ000 0OHM 5% 1 R1341 0RJ1000D677 "Resistor,Chip" MCR03EZPJ101 100OHM 5% R1278 0RJ1002D677 "Resistor,Chip"...
  • Page 42 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R1558 0RJ4701D677 "Resistor,Chip" MCR03EZPJ472 4.7KOHM 5 R175 0RJ1001D677 "Resistor,Chip" MCR03EZPJ102 1KOHM 5% R1559 0RJ4701D677 "Resistor,Chip" MCR03EZPJ472 4.7KOHM 5 R178 0RJ1000D677 "Resistor,Chip" MCR03EZPJ101 100OHM 5% R156 0RJ4701D677 "Resistor,Chip"...
  • Page 43 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R201 0RJ0000D677 "Resistor,Chip" MCR03EZPJ000 0OHM 5% 1 R221 0RJ0000D677 "Resistor,Chip" MCR03EZPJ000 0OHM 5% 1 R2011 0RJ0102D677 "Resistor,Chip" MCR03EZPJ100 10OHM 5% R222 0RJ0000D677 "Resistor,Chip" MCR03EZPJ000 0OHM 5% 1 R2013 0RJ0102D677 "Resistor,Chip"...
  • Page 44 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R324 0RJ0222D677 "Resistor,Chip" MCR03EZPJ220 22OHM 5% R363 0RJ4701D677 "Resistor,Chip" MCR03EZPJ472 4.7KOHM 5 R325 0RJ0512D677 "Resistor,Chip" MCR03EZPJ510 51OHM 5% R364 0RJ4702D677 "Resistor,Chip" MCR03EZPJ473 47KOHM 5% R326 0RJ0222D677 "Resistor,Chip"...
  • Page 45 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R453 0RJ1501D677 "Resistor,Chip" MCR03EZPJ152 1.5KOHM 5 R531 0RJ0000D677 "Resistor,Chip" MCR03EZPJ000 0OHM 5% 1 R454 0RJ2001D677 "Resistor,Chip" MCR03EZPJ202 2KOHM 5% R532 0RJ0000D677 "Resistor,Chip" MCR03EZPJ000 0OHM 5% 1 R455 0RJ2001D677 "Resistor,Chip"...
  • Page 46 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R597 0RJ4701D677 "Resistor,Chip" MCR03EZPJ472 4.7KOHM 5 R659 0RJ4701D677 "Resistor,Chip" MCR03EZPJ472 4.7KOHM 5 R598 0RJ0000D677 "Resistor,Chip" MCR03EZPJ000 0OHM 5% 1 R660 0RJ1002D677 "Resistor,Chip" MCR03EZPJ103 10KOHM 5% R599 0RJ0000D677 "Resistor,Chip"...
  • Page 47 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R709 0RJ0000D677 "Resistor,Chip" MCR03EZPJ000 0OHM 5% 1 R765 0RJ1001D677 "Resistor,Chip" MCR03EZPJ102 1KOHM 5% R710 0RJ0222C678 "Resistor,Chip" MCR01MZPJ220 22OHM 5% R766 0RJ1002D677 "Resistor,Chip" MCR03EZPJ103 10KOHM 5% R711 0RJ0222C678 "Resistor,Chip"...
  • Page 48 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R834 0RJ0222D677 "Resistor,Chip" MCR03EZPJ220 22OHM 5% R890 0RJ4701D677 "Resistor,Chip" MCR03EZPJ472 4.7KOHM 5 R835 0RJ0222D677 "Resistor,Chip" MCR03EZPJ220 22OHM 5% R891 0RJ2200D677 "Resistor,Chip" MCR03EZPJ221 220OHM 5% R836 0RJ0222D677 "Resistor,Chip"...
  • Page 49 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R953 0RJ0682D677 "Resistor,Chip" MCR03EZPJ680 68OHM 5% RR632 0RJ0332D677 "Resistor,Chip" MCR03EZPJ330 33OHM 5% R954 0RJ0682D677 "Resistor,Chip" MCR03EZPJ680 68OHM 5% RR633 0RJ0332D677 "Resistor,Chip" MCR03EZPJ330 33OHM 5% R955 0RJ0682D677 "Resistor,Chip"...
  • Page 50 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION RT751 0RJ1000C678 "Resistor,Chip" MCR01MZPJ101 100OHM 5% SW101 140-313B "Switch,Tact" KPT-1115AM 1C1P 12VDC RT752 0RJ1000C678 "Resistor,Chip" MCR01MZPJ101 100OHM 5% SW102 140-313B "Switch,Tact" KPT-1115AM 1C1P 12VDC RT753 0RJ1000C678 "Resistor,Chip"...
  • Page 51 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION P801 366-932E "Connector,Wafer" GIL-G-06P-S3T2-E 6P 2. 68509A0004B "Cable,Assembly" PLUG(R/A TO S/T) UL 13 EAD30302101 "Harness,Single" 10P SHIELD DMS CONNECT EAD35683002 "Harness,Single" LVDS LPL STANDARD FI-X EAD35908101 "Harness,Single"...
  • Page 56 Mar., 2007 P/NO : MFL36550701 Printed in Korea...

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