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Internal Use Only
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LCD TV
SERVICE MANUAL
CHASSIS : LD21C
MODEL : 26CS460/460S/460T
MODEL : 26CS460/460S/460T-ZA
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67360708 (1204-REV00) Printed in Korea
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CONTENTS CONTENTS .............................................................................................. 2 SAFETY PRECAUTIONS ........................................................................ 3 SERVICING PRECAUTIONS ................................................................... 4 SPECIFICATION ...................................................................................... 6 ADJUSTMENT INSTRUCTION ............................................................. 10 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) HD RGB EDID data(HD RGB input: only LM34 Model 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 71 40 61 40 45 40 31 40 01 01 EZ ADJUST ADC Calibration 30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88 0. Tool Option1 ADC Comp 480i NG 40 35 00
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* Auto-control interface and directions 3.4 Function Check (1) Adjust in the place where the influx of light like floodlight - Check display and sound around is blocked. (illumination is less than 10 lux). ■ Check Input and Signal items. (2) Adhere closely the Color analyzer(CA210) to the module 1) TV less than 10 cm distance, keep it with the surface of the 2) AV (SCART / CVBS) Module and Color analyzer's prove vertically.(80° ~ 100°). 3) COMPONENT (480i) (3) Aging time 4) RGB (PC : 1024
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4.2. EYE-Q function check 4.4. IR emitter inspection (1) Turn on TV. (1) Start 3D pattern inspection. (2) Press EYE key of Adjustment remote control. (2) If IR emitter signal is correctly received to IR receiver, the (3) Cover the Eye Q II sensor on the front of the using your lamp of IR tester turn on. hand and wait for 6 seconds. (4) C onfirm that R/G/B value is lower than 10 of the "Raw Data (Sensor data, Back light)". If after 6 seconds, R/G/B value is not lower than 10, replace Eye Q I
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6.2. Comand Set 5. HI-POT Test Adjust mode CMD(hex) LENGTH(hex) Description 5.1. HI-POT auto-check preparation EEPROM WRITE A0h 84h+n n-bytes Write (n = 1~16) - Check the POWER cable and SIGNAL cable insertion condition * Description FOS Default write : <7mode data> write 5.2. HI-POT auto-check Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0, (1) Pallet moves in the station. (POWER CORD / AV CORD is Phase tightly inserted) Data write : Model Name and Serial Number write in EEP
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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 ▪ Setting
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BLOCK DIAGRAM Applied Model : **LM5800, **LS5600, **LS3500, **CS460 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 C
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Applied Model : **LM580T, **560T, **LS350T, **CS460T 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 Compone
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Applied Model : **LM580S, **560S, **LS350S, **CS460S 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 Compone
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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
