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Internal Use Only
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LED LCD TV
SERVICE MANUAL
CHASSIS : LD21B
MODEL : 47LS679C 47LS679C-ZC
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67360741 (1209-REV00) Printed in Korea
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CONTENTS CONTENTS .............................................................................................. 2 SAFETY PRECAUTIONS ........................................................................ 3 SERVICING PRECAUTIONS ................................................................... 4 SPECIFICATION ...................................................................................... 6 ADJUSTMENT INSTRUCTION ............................................................. 11 SCR
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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 LCD TV used LD21B 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 1) PAL-BG 2) PAL-DK 2 Broadcasting system 3) PAL-I/I’ 4) SECAM L/L’ 5) DVB-T/T2/C/S ► 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(Bitrate_Mbit/s) 1/4, 1/8, 1/16, 1/32, 1/128, 19/128, 19/256, - Modulation : Code Rate QPSK : 1/2, 2/5, 2/3, 3/4, 5/6 Analog : Upper Heterodyne 16-QAM
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5. 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 720P 10 1920
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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 FHD only 9 1920*1080 67.50 60.00 148.5 HDTV 1080P O FHD only DTV 1 7
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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 LCD TV with LD21B 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 3.3. EDID data (1) ADC (1) FHD RGB EDID data (RGB input : only LD21B support) - Enter Service Mode by pushing "ADJ" key, 0 1 2 3 4 5 6 7 8 9 A B C D E F - Enter Internal ADC mode by pushing "►" key at "7. ADC 00 00 FF FF FF FF FF FF 00 1E 6D a b 10 c 01 03 68 A0 5A 78 0A EE 91 A3 54 4C 99 26 Calibration". 20 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80 EZ ADJUST ADC Calibration 30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C 0. Tool Option1 ADC Comp 480i NG 40 45 00 A0 5
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* Connecting picture of the measuring instrument 3.4. Function Check (On Automatic control) - Check display and sound Inside PATTERN is used when W/B is controlled. Connect to ■ Check Input and Signal items. auto controller or push Adjustment R/C POWER ON → 1) TV Enter the mode of White-Balance, the pattern will come out. 2) AV (SCART / CVBS) 3) COMPONENT (480i) 4) RGB (PC : 1024 x 768 @ 60hz) (* RGB input : LD21B only support) Full White Pattern CA-210 5) HDMI COLOR 6) PC Audio In (* exce
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* Manual W/B process using adjust Remote control. 4.3. IR emitter inspection ▪ After enter Service Mode by pushing "ADJ" key, (1) Start 3D pattern inspection. ▪ Enter White Balance by pushing " " key at "8. White ► (2) If IR emitter signal is correctly received to IR receiver, the Balance". lamp of IR tester turn on. EZ ADJUST White Balance Cool Color Temp. 0. Tool Option1 R-Gain 172 1. Tool Option2 G-Gain 172 2. Tool Option3 B-Gain 192 3. Tool Option4 R-Cut 64 4. Tool Option5 G-Cut 5. Count
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6.3. Method & notice 5. HI-POT Test (1) Serial number D/L is using of scan equipment. 5.1. HI-POT auto-check preparation (2) Setting of scan equipment operated by Manufacturing - Check the POWER cable and SIGNAL cable insertion condition Technology Group. (3) Serial number D/L must be conformed when it is produced in production line, because serial number D/L is mandatory by 5.2. HI-POT auto-check D-book 4.0. (1) Pallet moves in the station. (POWER CORD / AV CORD is tightly inserted) * M
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7.2. LAN Inspection 7. MAC Address & CI+ key download 7.2.1. Equipment & Condition 7.1. MAC Address ▪ Each other connection to LAN Port of IP Hub and Jig 7.1.1. Equipment & Condition ▪ Play file : Serial.exe ▪ MAC Address edit ▪ Input Start / End MAC address 7.1.2. Download method (1) Communication Prot connection 7.2.2. LAN inspection solution ▪ LAN Port connection with PCB ▪ Network setting at MENU Mode of TV ▪ Setting automatic IP Connection : PCBA (USB Port) → USB to Serial Adapter ▪ Sett
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SCREW ASSEMBLY WORKING GUIDE ■ Screw specification and application situation AA AA AA AA AA AA BB BB AA CC AA AA AA BB BB AA AA C C C C C C C C C C C C C C C C DDD DDD DDD DDD Check Screw Type When Screw is assembled at 'A' Part. If 'C' Screw is used at the 'A' part, Module will get damaged. Copyright © LG Electronics. Inc. All righ
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BLOCK DIAGRAM CI Slot Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only - 17 - Only for training and service purposes LVDS X-tal FPC(51P) 24M (FHD/50Hz) FE_TS_DATA[0:7] TDSN- TDSN- TU_CVBS SERIAL FLASH G G3 30 01 1D D SPI IC1401 (8M bit) SIF MX25L8005M2I ( (L LG GIIT T) ) DDR3 1Gb Rear DDR3 1Gb DDR3 Add. IC1202 IC1201 DDR3 Data H5TQ1G63BFR H5TQ1G63BFR TMDS HDMI1/2(DVI) I2C M24M01-HRMN6TP CVBS, Y/Pb/Pr, L/R IC104 256Kbit Component1 FE_ VOUT F-SCART NAND FLASH SC1_CV
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EXPLODED VIEW 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 X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Copyright © LG Electronics. In
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IC102 NAND01GW3B2CN6E NAND FLASH MEMORY +3.3V_Normal +3.3V_Normal Boot from SPI CS1N(EXT_FLASH) 1’b0 NC_1 NC_29 Boot from SPI_CS0N(INT_FLASH) 1’b1 1 48 NAND_FLASH_1G_NUMONYX IC101 NC_2 NC_28 EAN60762401 2 47 LGE2111A-T8 PCM_A[0-7] NC_3 NC_27 OS 3 46 PCM_D[0-7] 22 (I2S_OUT_BCK,I2S_OUT_MCK,PAD_PWM1PAD_PWM0) NC_4 NC_26 S7LR2_DIVX_MS10 4 45 PCM_D[0] AR101 B51_no_EJ : 4’b0000 Boot from 8051 with SPI flash W21 OS PCMDATA[0]/GPIO126 NC_5 I/O7 PC
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MODEL OPTION PIN NAME PIN NO. LOW HIGH +3.3V_Normal +2.5V_Normal +3.3V_Normal MODEL OPTION MODEL_OPT_0 AB3 FHD HD +1.10V_VDDC +1.10V_VDDC VDDC 1.05V MODEL_OPT_1 PHM_ON F4 PHM_OFF VDDC : 2026mA OS_DualStream(O)/NonOS_ErrorOut(X) MODEL_OPT_2 AB2 NON_DVB_T2 DVB_T2 R290 1K T25 NON_3D 3D OPT OPT MODEL_OPT_3 MODEL_OPT_4 OPT OPT OPT OPT OPT U23 NON_OLED OLED OPT OPT R201 100 IF_AGC_SEL MODEL_OPT_0 R202 BOOSTER_OPT 100 MODEL_OPT_5 T24 NON_DVB_S LNA2_CTL MODEL_OPT_1 DVB_S RF_SW_OPT 100 R203 RF_SWITCH_CTL
