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Internal Use Only
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Asia/Oceania http://biz.lgservice.com
LED LCD TV
SERVICE MANUAL
CHASSIS : LD21C
MODEL : 42LS3450/345S/345T/341C
42LS3450/345S/345T/341C-ZA
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67360738 (1210-REV01) Printed in Korea
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CONTENTS CONTENTS .............................................................................................. 2 SAFETY PRECAUTIONS ........................................................................ 3 SERVICING PRECAUTIONS ................................................................... 4 SPECIFICATION ...................................................................................... 6 ADJUSTMENT INSTRUCTION ............................................................. 11 BLO
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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 LD21C 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 LD21C 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. 5. HI-POT Test ▪ After enter Service Mode by pushing "ADJ" key, 5.1. HI-POT auto-check preparation ▪ Enter White Balance by pushing " " key at "8. White ► - Check the POWER cable and SIGNAL cable insertion condition Balance". EZ ADJUST White Balance 5.2. HI-POT auto-check Cool Color Temp. 0. Tool Option1 (1) Pallet moves in the station. (POWER CORD / AV CORD is R-Gain 172 1. Tool Option2 G-Gain 172 tightly inserted) 2. Tool Option3 B-Gain 19
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6.3. Method & notice 7. MAC Address & CI+ key download (1) Serial number D/L is using of scan equipment. 7.1 MAC Address (2) Setting of scan equipment operated by Manufacturing 7.1.1 Equipment & Condition Technology Group. (3) Serial number D/L must be conformed when it is produced in ▪ Play file : Serial.exe production line, because serial number D/L is mandatory by ▪ MAC Address edit D-book 4.0. ▪ Input Start / End MAC address * Manual Download(Model Name and Serial Number) 7.1.2 Download
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7.2 LAN Inspection 7.2.1. Equipment & Condition ▪ Each other connection to LAN Port of IP Hub and Jig 7.2.2. LAN inspection solution ▪ LAN Port connection with PCB ▪ Network setting at MENU Mode of TV ▪ Setting automatic IP ▪ Setting state confirmation -> If automatic setting is finished, you confirm IP and MAC Address. 7.3. LAN PORT INSPECTION(PING TEST) Connect SET -> LAN port == PC -> LAN Port SET PC 7.3.1. Equipment setting (1) Play the LAN Port Test PROGRAM. (2) Input IP set up for an ins
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BLOCK DIAGRAM Applied Model : **LS3450 CI Slot Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only - 16 - Only for training and service purposes LVDS X-tal FPC(51P) 24M (FHD/50Hz) IF +/- TDSS- TDSS- TU_CVBS SERIAL FLASH G G1 10 01 1D D SPI IC1401 (8M bit) SIF MX25L8005M2I ( (L LG GIIT T) ) DDR3 1Gb Rear DDR3 Add. DDR3 1Gb 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 NA
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Applied Model : **LS345T 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 F
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Applied Model : **LS345S CI Slot Copyright © LG Electronics. Inc. All rights reserved. LGE Internal Use Only - 18 - Only for training and service purposes LVDS X-tal FPC(51P) 24M (FHD/50Hz) FE_TS_DATA[0:7] TDSQ- TDSQ- TU_CVBS SERIAL FLASH G G0 00 01 1D D SPI IC1401 (8M bit) SIF MX25L8005M2I ( (L LG GIIT T) ) DDR3 1Gb DDR3 Add. Rear DDR3 1Gb 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 F
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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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+3.5V_ST --> 3.375V --> 3.46V +12V/+15V +20V --> 3.51V --> 3.76V (3.59V) +12V/+15V +3.5V_ST +3.5V_ST PANEL_POWER +24V --> 3.78V --> 3.92V (3.79V) R488 FROM LIPS & POWER B/D +12V --> 3.58V --> 3.82V (3.68V) L412 100K OPT 120 +18.5V --> 3.5V --> 3.75V (3.59V) PD_+12V R463 CIS21J121 PD_+3.5V R450 10K R448 0 OPT 2.7K PWR_DET_ON_SEMI IC408 0.015uF C442 1% 5% 0.01uF NCP803SN293 C438 10uF C409 C436 New item R402 0.1uF 25V POWER_DET 0.015uF 0.01uF 100 VCC RESET 25V 3 2 50V 50V Q409 +3.5V_ST AO3407A PD_K
