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Internal Use Only
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LED TV
SERVICE MANUAL
CHASSIS : LD34N
MODEL: 55LA970V/W/9 55LA970V/W/9-ZA
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67733212 (1308-REV00) Printed in Korea
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CONTENTS CONTENTS .............................................................................................. 2 SAFETY PRECAUTIONS ........................................................................ 3 SERVICING PRECAUTIONS .................................................................... 4 SPECIFICATION ....................................................................................... 6 ADJUSTMENT INSTRUCTION .............................................................. 13 EXP
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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 LD34N 1) Performance: LGE TV test method followed chassis. 2) Demanded other specification - Safety : CE, IEC specification - EMC : CE, IEC 2. Requirement for Test - Wireless : Wireless HD Specification (Option) Each part is tested as below without special appointment. 1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F
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No. Item Specification Remarks 2 Broadcasting system 1) PAL-BG/DK/I/I’ 2) SECAM L/L’, DK, BG, I 3) DVB-T/T2, C, S/S2 1 ) Digital TV - VHF, UHF - C-Band, Ku-Band 2) Analogue TV 3 Program coverage -VHF : E2 to E12 -UHF : E21 to E69 -CATV : S1 to S20 -HYPER : S21 to S47 ► DVB-T - Guard Interval(Bitrate_Mbit/s) 1/4, 1/8, 1/16, 1/32 - Modulation : Code Rate QPSK : 1/2, 2/3, 3/4, 5/6, 7/8 16-QAM : 1/2, 2/3, 3/4, 5/6, 7/8 64-QAM : 1/2, 2/3, 3/4, 5/6, 7/8 ► DVB-T2 - Guard Interval(Bitrat
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5. External input format 5.1. 2D Mode (1) Component input(Y, CB/PB, CR/PR) No. Resolution H-freq(kHz) V-freq(Hz) 1. 720×480 15.73 60.00 SDTV, DVD 480i 2. 720×480 15.63 59.94 SDTV, DVD 480i 3. 720×480 31.47 59.94 480p 4. 720×480 31.50 60.00 480p 5. 720×576 15.625 50.00 SDTV 576i 6. 720×576 31.25 50.00 SDTV 576p 7. 1280×720 45.00 50.00 HDTV 720p 8. 1280×720 44.96 59.94 HDTV 720p 9. 1280×720 45.00 60.00 HDTV 720p 10. 1920×1080 31.25 50.00 HDTV 1080i 11. 1920×1080 33.75 60.00 HDTV 1080i 12. 1920×108
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5.2. 3D Mode (1) RF Input(3D supported mode manually) No. Resolution Proposed 3D input proposed mode 1080I 1 HD - DTV 720P 2D to 3D 576P Side by Side(Half) 2 SD - DTV 576I Top & Bottom 3 SD - ATV(CVBS/SCART) (2) RF Input(3D supported mode automatically) No. Signal 3D input proposed mode Side by Side(Half), 1 Frame Compatible Top & Bottom (3) HDMI 1.3 (3D supported mode manually) No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed 3D input proposed mode 1 720*480 31.5 60 27.03 SDTV 48
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(4) HDMI 1.4b (3D supported mode automatically) No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) VIC 3D input proposed mode Proposed Top-and-Bottom Secondary(SDTV 480P) 1 31.469 / 31.5 59.94/ 60 25.125/25.2 1 Side-by-side(half) Secondary(SDTV 480P) 640*480 Frame packing Secondary(SDTV 480P) 2 62.938/63 59.94/ 60 50.35/50.4 1 Line alternative (SDTV 480P) 3 31.469 / 31.5 59.94/ 60 50.35/50.4 1 Side-by-side(Full) (SDTV 480P) Top-and-Bottom Secondary(SDTV 480P) 4 31.469 / 31.5 59.94 / 60 27.0
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(5) HDMI-PC Input (3D) (3D supported mode manually) No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) 3D input proposed mode Proposed 2D to 3D, Side by Side(half) 1 1024*768 48.36 60 65 HDTV 768P Top & Bottom 2D to 3D, Side by Side(half) 2 1360*768 47.71 60 85.5 HDTV 768P Top & Bottom 2D to 3D, Side by Side(half) Top & Bottom, Checker Board, 3 1920*1080 67.500 60 148.50 Single Frame Sequential, HDTV 1080P Row Interleaving, Column Interleaving 54 24 296.703 2D to 3D, 4 3840*2160 56.25 25 29
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(8) USB, DLNA -Photo (3D) (3D supported mode manually) No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) 3D input proposed mode 1 Under 320x240 - - - 2D to 3D 2 Over 320x240 - - - 2D to 3D, Side by Side(Half), Top & Bottom (9) USB, DLNA (3D) (3D supported mode automatically) No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) 3D input proposed mode Side by Side(Half), Top & Bottom, Checker 1 1080p 33.75 30 74.25 Board, MPO(Photo), JPS(Photo) (10) Miracast, Widi (3D supported mode manu
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ADJUSTMENT INSTRUCTION 3.1.3. Adjustment 1. Application Range (1) Adjustment method This specification sheet is applied to all of the LED TV with - U sing RS-232, adjust items in the other shown in LD34N chassis. "3.1.3.3)" (2) Adj. protocol 2. Designation Protocol Command Set ACK (1) Because this is not a hot chassis, it is not necessary to Enter adj. mode aa 00 00 a 00 OK00x use an isolation transformer. However, the use of isolation xb 00 04 b 00 OK04x (Adjust 480i, 1080p Comp1 ) Source c
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3.3. LAN Inspection 3.4. LAN PORT INSPECTION(PING TEST) Connect SET → LAN port == PC → LAN Port 3.3.1. Equipment & Condition ▪ Each other connection to LAN Port of IP Hub and Jig SET PC 3.4.1. Equipment setting (1) Play the LAN Port Test PROGRAM. (2) Input IP set up for an inspection to Test Program. *IP Number : 12.12.2.2 3.4.2. LAN PORT inspection(PING TEST) (1) Play the LAN Port Test Program. (2) Connect each other LAN Port Jack. 3.3.2. LAN inspection solution (3) Play Test (F9) button and co
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2) Check the key download for transmitted command 3.5. Model name & Serial number Download (RS232: ci 00 10) 3.5.1. Model name & Serial number D/L CMD 1 CMD 2 Data 0 ▪ Press "Power on" key of service remote control. (Baud rate : 115200 bps) C I 1 0 ▪ Connect RS-232C Signal to USB Cable to USB. ▪ Write Serial number by use USB port. 3) Result value ▪ Must check the serial number at Instart menu. - Normally status for download : OKx - Abnormally status for download : NGx 3.5.2. Method & notice
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ⓓ Model Name(Hex): LGTV 4. Manual Adjustment Cf) TV set’s model name in EDID data is below. * ADC adjustment is not needed because of OTP(Auto ADC MODEL NAME MODEL NAME(HEX) adjustment) LG TV 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 (LG TV) 4.1. E DID(The Extended Display Identification ⓔ Checksum(LG TV): Changeable by total EDID data. Data)/DDC(Display Data Channel) download FHD 4.1.1. Overview EDID C/S data HDMI It is a VESA regulation. A PC or a MNT will display an optimal Bl
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# HDMI 3(C/S : E8 C0) 4.2.4. Equipment connection MAP EDID Block 0, Bytes 0-127 [00H-7FH] 0 0 1 2 3 4 5 6 7 8 9 A B C D E F Color Analyze r 00 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01 RS-232C Probe 10 01 17 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26 Compute r 20 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80 RS-232C RS-232C 30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C Pattern Generat or 40 45 00 40 84 63 00 00 1E 66 21 50 B0 51 00 1B 30 Signal Source 50 40 70 36 00 40 84 63 00
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How to adjust 4.2.6. Adj. method 1. If G gain is adjusted over 172 and R gain and B gain (1) Auto adj. method less than 192 , Adjust is O.K. 1) Set TV in adj. mode using POWER ON key. 2. If G gain is less than 172 , increase G gain by up to 2) Zero calibrate probe then place it on the center of the 172, and then increase R gain and B gain same Display. amount of increasing G gain. 3) Connect Cable.(RS-232C to USB) 3. If R gain or B gain is over 255 , Readjust G gain less 4)
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4.2.8. EDGE LED White balance table 4.3. Local Dimming Function Check (1) EDGE LED module change color coordinate because of Step 1) Turn on TV. aging time. Step 2) Press “TILT” key on the Adj. R/C (2) A pply under the color coordinate table, for compensated Step 3) A t the Local Dimming mode, module Edge Backlight aging time. moving left to right. Back light of IOP module moving (3) Normal line(Edge, Direct) Step 4) confirm the Local Dimming mode. - Gumi (Mar ~ Dec) & Global Step 5) Press “
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4.6. Wi-Fi Test 4.8. Inspection of light scattering Step 1) Turn on TV ▪ Test Method Step 2) Select Network Connection option in Network Menu. Step 3) Select Start Connection button in Network Connection. (1) Push “Power only” key. (2) Push “HDMI” hot key. (3) Inspect whether light scattering is occurred in internal black pattern or not. (4) Push “Power only” key. 4.9. Option selection per country 4.9.1. Overview Step 4) If the system finds any AP like blow PIC, it is working - Option select
