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Internal Use Only
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LED TV
SERVICE MANUAL
CHASSIS : LD3AF
MODEL : 37LN549E 37LN549E-ZA
37LP63*H 37LP63*H-ZA
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67800104 (1305-REV00) Printed in Korea
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CONTENTS CONTENTS .............................................................................................. 2 SAFETY PRECAUTIONS ........................................................................ 3 SERVICING PRECAUTIONS ................................................................... 4 SPECIFICATION ...................................................................................... 6 ADJUSTMENT INSTRUCTION ............................................................. 10 TRO
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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 Exploded View. 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. Do not modify the original design without permission of manufacturer. General Guidance Leakage Current Hot Check
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SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service 2. After removing an electrical assembly equipped with ES manual and its supplements and addenda, read and follow the devices, place the assembly on a conductive surface such as SAFETY PRECAUTIONS on page 3 of this publication. aluminum foil, to prevent electrostatic charge buildup or expo- NOTE: If unforeseen circumstances create conflict between the sure of the assembly. following servicing precautions and any
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IC Remove/Replacement 3. Solder the connections. Some chassis circuit boards have slotted holes (oblong) through CAUTION: Maintain original spacing between the replaced which the IC leads are inserted and then bent flat against the cir- component and adjacent components and the circuit board to cuit foil. When holes are the slotted type, the following technique prevent excessive component temperatures. should be used to remove and replace the IC. When working with boards using the familiar r
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SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range 3. Test method This specification is applied to the LED TV used LD3AF 1) Performance: LGE TV test method followed chassis. 2) Demanded other specification - Safety : CE, IEC specification - EMC : CE, IEC 2. Requirement for Test Each part is tested as below without special appointment. 1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C 2) Relative Humidity: 65 %
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No. Item Specification Remarks Analogue TV Analogue TV : (RF) VHF: E2 to E12, UHF : E21 to E69 1) PAL-BG (CATV) S1 to S20, HYPER: S21 to S47 2) PAL-DK 3) PAL-I/I’ Digital TV : VHF, UHF 2 Broadcasting system 4) SECAM L/L’ Digital TV Satellite TV : VHF, UHF, C-Band, Ku-Band 1) DVB-T/C/T2 Satellite Digital TV * DVB-T2 ( T2 model only support ) 1) DVB-T/C/S/S2 * DVB-S/S2 (Satellite model only support ) ► DVB-T - Guard Interval (Bitrate_Mbit/s) 1/4, 1/8, 1/16, 1/32 - Modulation : Code Rate QPSK :
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5. Supported video resolutions (2D) 5.1. Component Input (Y, CB/PB, CR/PR) No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock(MHz) Proposed 1 720*576 15.625 50.00 13.5 SDTV ,DVD 576I 2 720*480 15.73 60.00 13.5135 SDTV ,DVD 480I 3 720*480 15.73 59.94 13.50 SDTV ,DVD 480I 4 720*576 31.25 50.00 27.00 SDTV 576P 5 720*480 31.50 60.00 27.027 SDTV 480P 6 720*480 31.47 59.94 27.00 SDTV 480P 7 1280*720 37.50 50.00 74.25 HDTV 720P 8 1280*720 45.00 60.00 74.25 HDTV 720P 9 1280*720 44.96 59.94 74.176 HDTV 72
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5.3. HDMI Input(PC/DTV) No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark PC(DVI) DDC 1 640*350 31.468 70.09 25.17 EGA X 2 720*400 31.469 70.08 28.32 DOS O 3 640*480 31.469 59.94 25.17 VESA(VGA) O 4 800*600 37.879 60.31 40.00 VESA(SVGA) O 5 1024*768 48.363 60.00 65.00 VESA(XGA) O 6 1152*864 54.348 60.053 80.00 VESA O 7 1360*768 47.712 60.015 85.50 VESA (WXGA) O 8 1280*1024 63.981 60.020 108.0 VESA (SXGA) O 9 1920*1080 67.50 60.00 148.5 HDTV 1080P O DTV 1 720*480 31.47 59.94
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ADJUSTMENT INSTRUCTION (4) Click "Connect" tab. If "Can't" is displayed, check connection 1. Application Range between computer, jig, and set. This specification sheet is applied to all of the LED TV with LD3AF chassis. (2) (3) 2. Designation (1) The adjustment is according to the order which is designated and which must be followed, according to the plan which can be changed only on agreeing. (2) Power adjustment : Free Voltage. (3) Magnetic Field Condition: Nil. (4) Input signal Un
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3.1. ADC Process 4. Total Assembly line process (1) ADC 4.1. Adjustment Preparation - Enter Service Mode by pushing "ADJ" key, ▪ W/B Equipment condition - Enter Internal ADC mode by pushing "►" key at "8. ADC ca210 : LED -> CH14, Test signal: Inner pattern(80IRE) Calibration". ▪ Above 5 minutes H/run in the inner pattern. (“power on” key EZ ADJUST ADC Calibration of adjust remote control) 0. Tool Option1 ADC Comp 480i NG ▪ If it is executed W/B adjustment in 2~3 minutes H/run, it is 1. Too
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* Auto-control interface and directions 4.2. DPM operation confirmation (1) Adjust in the place where the influx of light like floodlight (Only Apply for MNT Model) around is blocked. (illumination is less than 10 lux). Check if Power LED Color and Power Consumption operate as (2) Adhere closely the Color analyzer(CA210) to the module standard. less than 10 cm distance, keep it with the surface of the ■ Set Input to RGB and connect D-sub cable to set Module and Color analyzer's prove v
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(3) HD RGB EDID data 4.5.2. Manual Download 0 1 2 3 4 5 6 7 8 9 A B C D E F 00 00 FF FF FF FF FF FF 00 1E 6D a b (1) Use the proper signal cable for EDID Download 10 c 01 03 68 A0 5A 78 0A EE 91 A3 54 4C 99 26 - Analog EDID : Pin3 exists 20 0F 50 54 A1 08 00 71 40 61 40 45 40 31 40 01 01 - Digital EDID : Pin3 exists 30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88 (2) Never connect HDMI & D-sub Cable at the same time. 40 35 00 40 84 00 00 00 1C 01 1D 00 72 51 D0 1E 20 (3) U
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4.6. Outgoing condition Configuration 5.2. Comand Set ■ W hen pressing IN-STOP key by SVC remocon, Red LED Adjust mode CMD(hex) LENGTH(hex) Description are blinked alternatively. And then automatically turn off. EEPROM WRITE A0h 84h+n n-bytes Write (n = 1~16) (Must not AC power OFF during blinking) * Description FOS Default write : <7mode data> write 4.7. HI-POT Test Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0, 4.7.1. HI-POT auto-check preparation Phase - Check the POWER cabl
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2. Check the method of CI+ key value (RS232) 6. CI+ Key Download method 1) Into the main ass’y mode (RS232 : aa 00 00) 6.1. Download Procedure CMD 1 CMD 2 Data 0 (1) Press "Power on" key of a service Remote control. A A 0 0 (Baud rate : 115200 bps) (2) Connect RS232-C Signal Cable. 2) Check the mothed of CI+ key by command (3) Write CI+ Key through RS-232-C. (RS232 : ci 00 20) (4) Check whether the key was downloaded or not at ‘In Start’ CMD 1 CMD 2 Data 0 menu. (Refer to below). C I
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(8) Check displayed image status(color, size) when TV is 8.3. USB Cloning Function check turning on. ● CASE 1. Clock LED Model Please use this image for test. (9) Try this inspection with various resolution images. * Must Restore to LG Logo. (10) Press “MENU” key. (11) Move cursor to OPTION and press “7” key 7 times. (12) Select accurate CPU S/W file and check “LOGO Image” button. (Press yellow color key on Remote Control.) (13) Check LG Logo operation when TV is tu
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● CASE 2. No Clock LED Model 8.4. Check Commercial features concerning Output.(IR Out/SPK Out/External Clock) Model Info Commercial Feature Name IR Out External Speaker out External Clock LP63xH-ZA O O O LN549E-ZA O O X 8.4.1. External SPK Out and Volume control (1) Connect external speaker to speaker out port with phone jack on TV side as below. (2) Check the Max. speaker output is 1W or not. Sine wave with 1KHz will be displayed. (3) Press V ol. control button up/down in turns and check
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8.4.3. External Clock < Equipment & Condition > ▪ Simple Jig (External Clock Assy) ▪ Power only mode (1) Connect external Clock Assy to CLOCK INTERFACE. (2) Check the LED CLOCK. Check LED Clock in Power on mode. * After finishing 8.1 ~ 8.4 inspections, press “IN STOP” key. Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only - 18 - Only for training and service purposes
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TROUBLESHOOTING GUIDE 1. Check the booting Voltage No No No Make sure the Stand-by Voltage. Make sure the Power Make sure the disconnection of Exchange the P401 3, 5pin : +3.5V_ST Connector. Main board 3.5V circuit. Circuit board. Yes No Make sure the Micom voltage. Exchange the L301. L301 : +3.5V_ST Yes No Make sure the CLK of X300 Exchange the X300. Is 10MHz. Yes No No Push Micom Reset(SW300) and Re-download of Exchange the Mstar(IC101) make sure the PWR_ON Firmware. Or Main board P401 1pin
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2. Digital TV Video Check the Stand-by Voltage P401 3, 5pin : +3.5V_ST Yes No Check the Tuner 3.3V Exchange the L2606. ; L2606 Yes No Check the Tuner 1.8V. Exchange the IC2603. IC2603 2pin : 1.8V Yes No Check the IF_P/N signal Exchange the Tuner. TU2601~3 10/11pin Yes No Check the LVDS output signal of Exchange the Mstar(IC101) Mstar IC. or Main board. 3. Analog TV Video Check the RF cable and RF signal. Yes No Check the Tuner 3.3V Exchange the L2606. ; L2606 Yes No Check the Tuner 1.8V. Exch
