Internal Use Only North/Latin America Europe/Africa Asia/Oceania http://aic.lgservice.com http://eic.lgservice.com http://biz.lgservice.com LED LCD TV SERVICE MANUAL CHASSIS : LD2AE MODEL : 26LT640H 26LT640H-ZA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS CONTENTS . ............................................................................................. 2 SAFETY PRECAUTIONS ......................................................................... 3 SERVICING PRECAUTIONS ................................................................... 4 SPECIFICATION ....................................................................................... 6 ADJUSTMENT INSTRUCTION .............................................................. 10 BLOCK DIAGRAM .
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.
SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this service manual and its supplements and addenda, read and follow the SAFETY PRECAUTIONS on page 3 of this publication. NOTE: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precautions. Remember: Safety First. General Servicing Precautions 1.
IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above. 3. Solder the connections.
SPECIFICATION NOTE : Specifications and others are subject to change without notice for improvement. 1. Application range This specification is applied to the LCD TV used LD2AE chassis. 3. Test method 2. Requirement for Test 1) Performance: LGE TV test method followed 2) Demanded other specification - Safety : CE, IEC specification - EMC : CE, IEC Each part is tested as below without special appointment.
No. 6 Item RGB Input 7 HDMI Input (3EA) 8 9 Audio Input (2EA) SDPIF out (1EA) 10 Earphone out (1EA) 11 USB (1EA ) Specification RGB-PC HDMI1-DTV/DVI HDMI2-DTV HDMI3-DTV RGB/DVI Audio SPDIF out Antenna, AV1, AV2, Component, RGB, HDMI1, HDMI2, HDMI3 EMF, DivX HD, For SVC (download) DVB DVB-C 13 RS232C (1EA) .
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*480 15.73 60.00 13.5135 SDTV ,DVD 480I 2 720*480 15.73 59.94 13.50 SDTV ,DVD 480I 3 720*480 31.50 60.00 27.027 SDTV 480P 4 720*480 31.47 59.94 27.00 SDTV 480P 5 1280*720 45.00 60.00 74.25 HDTV 720P 6 1280*720 44.96 59.94 74.176 HDTV 720P 7 1920*1080 33.75 60.00 74.25 HDTV 1080I 8 1920*1080 33.72 59.94 74.
5.3. HDMI Input(PC/DTV) No. Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) PC(DVI) 1 Proposed Remark DDC 640*350 31.468 70.09 25.17 EGA X 2 720*400 31.469 3 640*480 31.469 70.08 28.32 DOS O 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 1280*768 47.776 59.870 79.50 CVT(WXGA) Х 7 1360*768 47.712 60.015 85.50 VESA (WXGA) O 8 1280*1024 63.981 60.020 108.
ADJUSTMENT INSTRUCTION 1. Application Range (4) Click "Connect" tab. If "Can't" is displayed, check connection between computer, jig, and set. This specification sheet is applied to all of the LCD TV with LD2AE 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.
3.1. ADC Process (1) ADC - Enter Service Mode by pushing "ADJ" key, - Enter Internal ADC mode by pushing "►" key at "7. ADC Calibration". EZ ADJUST 4. Total Assembly line process 4.1. Adjustment Preparation ADC Calibration 0. Tool Option1 ADC Comp 480i NG 1. Tool Option2 ADC Comp 1080p NG 2. Tool Option3 ADC RGB NG 3. Tool Option4 4. Tool Option 5 Start Reset 5. Country Group 6. Area Option 7. ADC Calibration ඖ 8. White Balance 9.
4.4.
(1) HD RGB EDID data 00 10 20 30 40 50 60 70 80 90 A0 B0 C0 D0 E0 F0 0 00 1 2 3 4 5 FF FF FF FF FF c 01 03 68 10 0F 50 54 A1 08 00 01 01 01 01 01 01 35 00 A0 5A 00 00 6E 28 55 00 A0 5A 3E 1F 46 10 00 0A FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF f.
5. Model name & Serial number D/L 4) Check the model name Instart menu. → Factory name displayed. (ex 42LD450-ZA) 5) Check the Diagnostics.(DTV country only) → Buyer model displayed.(ex 42LD450) ▪ Press "Power on" key of service remote control. (Baud rate : 115200 bps) ▪ Connect RS232 Signal Cable to RS-232 Jack. ▪ Write Serial number by use RS-232. ▪ Must check the serial number at the Product/Service info.. (menu key -> red key -> select product/Service info) 5.1.
6. CI+ Key Download method 2. Check the method of CI+ key value (RS232) 1) Into the main ass’y mode (RS232 : aa 00 00) 6.1. Download Procedure (1) Press "Power on" key of a service R/C. (Baud rate : 115200 bps) (2) Connect RS232-C Signal Cable. (3) Write CI+ Key through RS-232-C. (4) Check whether the key was downloaded or not at ‘In Start’ menu. (Refer to below).
Half NIM (CAN) - - Tuner Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes - 16 - S001D) TU3702 RS- 232C 5V LED Clock MAX3232CDR IC1106 MP2305 MP2305 IC1302 DC/DC Conv.
EXPLODED VIEW IMPORTANT SAFETY NOTICE 300 * Set +Stand * Stand Base + Body A2 A21 A31 501 500 A10 510 200 LV1 540 810 120 401 521 400 910 900 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.
IC102 NAND01GW3B2CN6E Boot from SPI CS1N(EXT_FLASH) Boot from SPI_CS0N(INT_FLASH) +3.3V_Normal /PF_CE0 OPT R108 1K NC_7 NC_8 C101 0.1uF +3.3V_Normal VDD_1 NC_9 NC_10 OPT /PF_CE1 AL PF_ALE W /PF_WE WP R106 1K C B /PF_WP R102 3.
MODEL OPTION NON_DVB_T2 DVB_T2 T25 NON_3D 3D MODEL_OPT_4 U23 NON_OLED OLED MODEL_OPT_5 T24 NON_DVB_S DVB_S MODEL_OPT_6 B8 NON_120HZ 120HZ MODEL_OPT_7 A8 C4068-*1 68pF K3 D0+_HDMI1 J1 D0-_HDMI1 D1+_HDMI1 K2 K1 D1-_HDMI1 L2 D2+_HDMI1 L3 D2-_HDMI1 R4033 22 DDC_SDA_1 T5 R4034 22 T4 DDC_SCL_1 V5 HPD1 RXACKN VIFP VIFM RXA0P RXA0N IP RXA1P IM RXA1N RXA2P RXA2N SIFP SIFM 47 AC4 ANALOG SIF Close to MSTAR AD3 0.1uF 0.1uF C4011 C4013 0.1uF C4006 0.1uF 0.
MICOM MODEL OPTION CLOCK_SCL CLOCK_SDA R313 22 /PI_RESET_NEC 13pF 22 R349 22 P47/INTP2 R360 P46/INTP1/TI05/TO05 P120/INTP0/EXLVI 81 82 83 P43/SCK01 P44/SI01 P45/SO01 84 87 85 86 TOOL0 TOOL1 P42/TI04/TO04 P41/TOOL1 P40/TOOL0 89 RESET 90 91 P124/XT2 P123/XT1 92 P122/X2/EXCLK P121/X1 FLMD0 93 95 88 R345 1M FLMD0 0.
R448 2.7K New item GND 8 GND 9 10 3.5V BEAD_SS C406 0.1uF 16V +12V/+15V C408 0.1uF 16V OPT BEAD_SS L402 CIS21J121 3.5V 11 12 3.5V 13 14 GND GND 15 16 GND/V-sync 12V 17 18 INV ON 12V 19 20 A.DIM 12V 21 22 P.DIM1 GND/P.DIM2 23 24 Err OUT R419 1K PANEL_DISCHARGE_RES R415 100 C R418 6.8K OPT E C412 0.1uF 16V PD_+24V R407-*1 3K PD_+24V VCC 1/10W 1% PD_+12V R447 1.
AMP_RESET C516 1000pF 50V 50V GND_1 6 DGND Q501 MMBT3904(NXP) C505 1000pF 50V E PVDD1_1 PVDD1_3 PVDD1_2 38 39 OUT1A_1 40 OUT1A_2 BST1A /RESET AD GND_IO PGND1A 42 BST1B 32 VDR1 31 VCC_5 30 AGND SDA 12 25 OUT2A_1 R508 12 R515 12 C530 390pF 50V L505 10.0uH L506 10.0uH C537 0.1uF 50V R509 12 4.7K C535 0.47uF 50V C531 390pF 50V D502 1N4148W 100V OPT R516 SPEAKER_L C538 0.1uF 50V R513 12 R517 4.
CONTROL IR & LED +3.5V_ST R620 10K 1% R622 10K 1% L600 BLM18PG121SN1D R612 100 KEY1 L601 BLM18PG121SN1D R613 100 KEY2 C600 0.1uF D600 5.6V 200pF C601 0.1uF D601 5.6V 200pF P601 12507WR-10L +3.5V_ST 1 L602 BLM18PG121SN1D +3.5V_ST 2 +3.5V_ST R614 47K OPT R608 22 C602 0.1uF 16V R623 47K NEC_IR Q607 2SC3052 OPT R621 10K C B E OPT R624 47K C 3 C603 1000pF 50V +3.5V_ST 4 R625 47K OPT 5 6 B E Q608 2SC3052 +5V_ST R615 0 R603 22 C606 100pF 50V 7 ZD600 5.48VTO5.
FOR FHD REVERSE(10bit) Change in S7LR MIRROR [51Pin LVDS Connector] (For FHD 60/120Hz) LVDS_SEL +3.3V_Normal P703 FI-RE51S-HF-J-R1500 FHD 1 2 RXA0+ RXA0- RXA4- RXA0- RXA0+ RXA3+ RXA1+ RXA1- [30Pin LVDS Connector] (For HD 60Hz_Normal) R705 RXA3- RXA1- RXA1+ P705 3.
For CEC +3.5V_ST 5V_HDMI_1 HDMI_1 OPT R854 68K 5V_DET_HDMI_1 R806 10K R804 HDMI_CEC R830 B 1.8K 17 R802 3.3K DDC_SDA_1 16 DDC_SCL_1 15 R805 0 OPT R824 0 R809 0 13 OPT 5 4 3 2 1 A2 A1 +3.5V_ST CK+ OPT R813 100 D0-_HDMI1 D805 D0_GND R814 10K R816 68K 5V_HDMI_2 +5V_Normal D0+ D0+_HDMI1 D1-_HDMI1 D1_GND D1+ D1+_HDMI1 D2D2-_HDMI1 D2_GND CEC_REMOTE_NEC A1 D1- A2 CK+_HDMI1 D0- Q805 BSS83 HDMI_2 MMBD6100 D822 C 6 DDC_SCL_1 CEC_ON/OFF S B D 7 2.7K R812 68K G 8 2.
RS232C EXT_5V EXT_12V 10 5 R1000 0 9 R1001 100 8 IR_OUT_RS232C 4 3 7 R1002 100 2 +3.5V_ST D1000 CDS3C30GTH 30V OPT 6 D1001 CDS3C30GTH 30V OPT +3.5V_ST 1 C1000 0.33uF MAX3232CDR C1+ C1001 0.1uF C1002 0.1uF V+ C1- C2- VC1004 0.1uF SPG09-DB-009 R1004 1K JK1000 90V 16 R1003 47K VCC OPT C2+ C1003 0.1uF 1 D1002 1SS355 C1005 0.
RGB/SPDIF/PC/HP/USB RGB PC +5V_Normal D1115 MMBD6100 A2 C A1 EARPHONE BLOCK R1140 2.2K R1139 2.2K C1115 1000pF 50V OPT RGB_DDC_SCL HEAD_PHONE R1125 C 1K HEAD_PHONE Q1101 MMBT3904(NXP) B +3.3V_Normal B Q1104 MMBT3904(NXP) CHEAD_PHONE E R1155 1K GND 5 L 4 3 HEAD_PHONE 1 HEAD_PHONE R1128 1K C E Q1102 MMBT3904(NXP) HEAD_PHONE E B DSUB_HSYNC C1122 68pF 50V OPT C B R1129 3.
ZQ 240 1% A6 A7 B2 D9 G7 K2 K8 N1 N9 R1 R9 A8 VDD_1 A9 VDD_2 A10/AP VDD_3 A11 VDD_4 A12/BC VDD_5 A13 VDD_6 VDD_7 NC_5 VDD_8 VDD_9 BA0 BA1 A1 A8 C1 C9 D2 E9 F1 H2 H9 J1 J9 L1 L9 A-MA14 T7 BA2 VDDQ_1 VDDQ_2 CK VDDQ_3 CK VDDQ_4 CKE VDDQ_5 VDDQ_6 CS VDDQ_7 ODT VDDQ_8 RAS VDDQ_9 CAS WE NC_1 NC_2 RESET B3 E1 G8 J2 J8 M1 M9 P1 P9 T1 T9 B1 B9 D8 E2 E8 F9 G1 G9 R8 R2 T8 R3 L7 R7 N7 T3 A-MA3 NC_4 NC_6 A14 A-MA6 A-MA4 D11 A-MA7 A-MA5 B14 A-MA8 A-MA6 C13 A-MA11 A-MA9
+3.5V_ST +3.5V_ST +3.3V_Normal S_FLASH_MAIN_MACRONIX OPT R1302 4.7K +3.5V_ST IC1300 MX25L8006EM2I-12G CS# /SPI_CS OPT R1301 10K 8 2 7 3 6 4 5 VCC R1305 0 C1300 0.
P4R_GLOBAL_TUNER_BLOCK +3.3V_TU R1403 100K R1402 100 +3.3V_TU TUNER_RESET C1404 0.1uF 16V R1407 1K TU1400 TDSS-G101D SI2176_DVB_1INPUT_H C1401 18pF 50V R1405 33 R1406 33 R1408 1K TU_SCL TU_SDA OPT OPT C1411 C1412 20pF 20pF 50V 50V C1405 18pF 50V +3.3V_TU 1 2 3 4 5 6 7 8 9 10 11 NC RESET OPT C1402 10uF 6.3V SCL C1409 0.1uF 16V C1407 100pF 50V +3.3V_TU NON_ASIA_TU R1413 470 NON_ASIA_TU R1415 82 SDA close to the tuner pin +3.3V OPT R1410 0 close to TUNER 0.1uF +1.
+3.3V_Normal BUFFER/LINE DRIVER +3.3V_PROIDIOM +3.3V_Normal +3.3V_PROIDIOM +3.3V_PROIDIOM +3.3V_PROIDIOM IC1500 74LVC16244ADGG OPT NFM18PS105R0J L1502 PI_LG1001 L1511 CIS21J121 PI_LG1001 L1509 CIS21J121 PI_LG1001 L1508 CIS21J121 PI_LG1001 L1507 CIS21J121 PI_LG1001 L1506 CIS21J121 0 . 1 u F PI_LG1001 0 . 1 u F PI_LG1001 C1535 0 . 1 u F PI_LG1001 C1534 0 . 1 u F PI_LG1001 C1533 0 . 1 u F PI_LG1001 C1532 0 . 1 u F PI_LG1001 C1531 0 . 1 u F PI_LG1001 C1530 0 .
+3.3V_Normal COMPONENT2 R1660 AV2 R1666 10K 1K AV2 OPT D1624 5.6V 200pF D1612 10pF 20V [GN]E-LUG 6A R1619 75 AV_CVBS_DET C1646 0.1uF 16V AV2 [GN]O-SPRING COMP2_Y+/AV_CVBS_IN 5A [GN]CONTACT 4A [BL]E-LUG-S 7B D1614 10pF 20V R1620 75 D1615 10pF 20V R1621 75 [BL]O-SPRING COMP2_Pb+ 5B [RD]E-LUG-S 7C IC1601-*1 SN324 [RD]O-SPRING_1 COMP2_Pr+ 5C [RD]CONTACT_1 4C OUT1 R1633 10K 1 COMP2_L_IN 5D R1603 0 [WH]O-SPRING 4E [RD]CONTACT_2 5E [RD]O-SPRING_2 6E [RD]E-LUG D1616 5.
EXT_SPK AMP UART/I2C SWITCH 400mA +5V_Normal +5V_SUB_AMP EXT_SPK +5V_SUB_AMP UART_SW1 CONNECTION L A - B0 MSTAR ADJ H A - B1 MSTAR DEBUG L1704 BLM18PG121SN1D EXT_SPK C1700 22uF 16V UART_SW2 CONNECTION L A - B0 INTERACTIVE H A - B1 NEC USB_DOWNLOAD EXT_SPK EXT_SPK C1701 0.
Vout=(1+R1/R2)*0.765=5.03V EXTERNAL_POWER OUT 5V/12V POWER_OUT POWER_OUT R1804 100K R1820 43 Switching noise reducing [MPS recommend] POWER_OUT C1803 0.1uF 50V POWER_OUT R1810 22 IC1802 MP4460DQ-LF-Z SW_2 EN POWER_OUT R1800 18K POWER_OUT COMP C1802 150pF 50V 1 10 2 3 POWER_OUT $0.
* Option name of this page : CI_SLOT (because of Hong Kong) CI Region CI SLOT +5V_CI_ON CI TS INPUT EAG41860101 P1902 CI_SLOT 10067972-050LF C1906 10uF 10V R1903 10K EAG41860102 P1901 OPT 10067972-000LF C1903 0.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION. FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes 9.5T_GAS 12.5T_GAS GAS4-*1 5.5T_GAS 7.5T_GAS 9.5T_GAS 12.5T_GAS 5.5T_GAS GAS5-*1 5.5T_GAS GAS5-*2 7.
1. Trouble Shooting Contents of LCD TV Standard Repair Process No.
Standard Repair Process Error symptom LCD TV A. Video error Established date No video/ Normal audio Revised date 1/13 First of all, Check whether all of cables between board is inserted properly or not. (Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,) ☞A1 No video Normal audio Normal audio Y ☞A4 Check Back Light On with naked eye N Move to No video/No audio Y On Check Main Board 3.5V,12V,3.3V, 1.26V, 1.5V etc. N ☞A2 N Check Power Board 24V,12V,3.
Standard Repair Process LCD TV Error symptom A. Video error Established date No video/ No audio Revised date 2/13 ☞A4 No Video/ No audio Check various voltages of Power Board ( 3.5V,12V,20V or 24V…) Normal voltage? Y N Check and replace MAIN B/D End Replace Power Board and repair parts 2 Copyright © 2012 LG Electronics. Inc. All rights reserved.
Standard Repair Process Error symptom LCD TV Check RF Signal level Normal Signal? Y A. Picture Problem Established date Picture broken/ Freezing Revised date 3/13 . By using Digital signal level meter . By using Diagnostics menu on OSD ( Menu→Setup→Manual Tuning) - Signal strength (Normal : over 30%) - Signal Quality (Normal: over 30%) Check whether other equipments have problem or not.
Standard Repair Process LCD TV Error symptom Check color by input -External Input -COMPONENT -RGB -HDMI/DVI Color error? N Y A.
Standard Repair Process LCD TV Error symptom A.
Standard Repair Process LCD TV Error symptom B. Power error Established date No power Revised date ☞A17 Check Power LED . Stand-By: Red . Operating: white 6/13 ☞A19 DC Power on by pressing Power Key On Remote control Y Power LED On? N Normal N operation? Check Power On ‘”High” OK? Y Replace Power B/D N Y Check Power cord was inserted properly Replace Main B/D ☞A4 Measure voltage of each output of Power B/D N Normal? Y Close Y ※ Check ST-BY 3.
Standard Repair Process LCD TV Error symptom B.
Standard Repair Process LCD TV Error symptom C. Audio error Established date No audio/ Normal video Revised date ☞A24 No audio Screen normal Check user menu > Speaker off 8/13 ☞A25 N Off Check audio B+ 20V or 24V of Power Board Normal voltage Y N Cancel OFF Check Speaker disconnection Y Replace Power Board and repair parts N Disconnection Replace MAIN Board End Y Replace Speaker 8 Copyright © 2012 LG Electronics. Inc. All rights reserved.
Standard Repair Process LCD TV Error symptom C.
Standard Repair Process Error symptom LCD TV D. General Function Problem Established date Remote control & Local switch checking Revised date 10/13 1. Remote control(R/C) operating error Replace Main B/D ☞A27 Check R/C itself Operation Normal Y operating? N Normal operating? N Y Check R/C Operating When turn off light in room Check & Replace Baterry of R/C If R/C operate, Explain the customer cause is interference from light in room.
Standard Repair Process LCD TV Check input signal Error symptom Y Signal input? N D.
Standard Repair Process LCD TV Identify nose type Error symptom E. Noise Established date Circuit noise, mechanical noise Revised date Circuit noise Check location of noise Mechanical noise Check location of noise 12/13 Replace PSU(with LED driver) OR Replace LED driver ※ When the nose is severe, replace the module (For models with fix information, upgrade the S/W or provide the description) ※ Mechanical noise is a natural phenomenon, and apply the 1st level description.
Standard Repair Process LCD TV F. Exterior defect Error symptom Zoom part with exterior damage Exterior defect Module damage Replace module Cabinet damage Replace cabinet Remote controller damage Stand dent Established date Revised date 13/13 Replace remote controller Replace stand 13 Copyright © 2012 LG Electronics. Inc. All rights reserved.
Standard Repair Process Detail Technical Manual LCD TV Error symptom A. Video error_Video error, video lag/stop Content TUNER input signal strength checking method Established date Revised date A6 MENU -Æ red key(customer support -Æ signal test -Æ select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) A6 Copyright © 2012 LG Electronics. Inc. All rights reserved.
Standard Repair Process Detail Technical Manual LCD TV Error symptom A. Video error_Video error, video lag/stop Content LCD-TV Version checking method Established date Revised date A7 1. Checking method for remote controller for adjustment Version Press the IN-START with the remote controller for adjustment A7 Copyright © 2012 LG Electronics. Inc. All rights reserved.
Standard Repair Process Detail Technical Manual LCD TV Error symptom A. Video error_Color error Content Adjustment Test pattern - ADJ Key Established date Revised date A12 You can view 6 types of patterns using the ADJ Key Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..) 4.Video error (Classification of MODULE or Main-B/D!) A12 Copyright © 2012 LG Electronics. Inc. All rights reserved.
Appendix : Exchange T-Con Board (1) Solder defect, CNT Broken Solder defect, CNT Broken Solder defect, CNT Broken Solder defect, CNT Broken T-Con T-Con Defect, Defect, CNT CNT Broken Broken Solder defect,CNT CNTBroken Broken T-Con Defect, Abnormal Power Section Solder defect, Short/Crack Abnormal Power Section Solder defect, Short/Crack A - 1/5 Copyright © 2012 LG Electronics. Inc. All rights reserved.
Appendix : Exchange T-Con Board (2) Abnormal Power Section Solder defect, Short/Crack GRADATION Abnormal Power Section Solder defect, Short/Crack Fuse Open, Abnormal power section Abnormal Display Noise GRADATION A - 2/5 Copyright © 2012 LG Electronics. Inc. All rights reserved.
Appendix : Exchange PSU(LED driver) No Light Dim Light Dim Light Dim Light No picture/Sound Ok A - 3/5 Copyright © 2012 LG Electronics. Inc. All rights reserved.
Appendix : Exchange the Module (1) Panel Mura, Light leakage Crosstalk Panel Mura, Light leakage Press damage Press damage Crosstalk Un-repairable Cases In this case please exchange the module. Press damage A - 4/5 Copyright © 2012 LG Electronics. Inc. All rights reserved.
Appendix : Exchange the Module (2) Vertical Block Source TAB IC Defect Horizontal Block Gate TAB IC Defect Vertical Line Source TAB IC Defect Horizontal Gate TAB ICBlock Defect Gate TAB IC Defect Vertical Block Source TAB IC Defect Horizontal line Gate TAB IC Defect Gate TAB IC Defect Un-repairable Cases In this case please exchange the module. Horizontal Block Gate TAB IC Defect Gate TAB IC Defect A - 5/5 Copyright © 2012 LG Electronics. Inc. All rights reserved.
Standard Repair Process Detail Technical Manual LCD TV Error symptom B. Power error _Off when on, off whiling viewing Established Content POWER OFF MODE checking method date Revised date A22 Entry method 1. Press the IN-START button of the remote controller for adjustment 2. Check the entry into adjustment item 3 A22 Copyright © 2012 LG Electronics. Inc. All rights reserved.
Standard Repair Process Detail Technical Manual LCD TV Error symptom C. Audio error_No audio/Normal video Content Checking method in menu when there is no audio Established date Revised date A24 Checking method 1. Press the MENU button on the remote controller 2. Select the AUDIO function of the Menu 3. Select TV Speaker from Off to On A24 Copyright © 2012 LG Electronics. Inc. All rights reserved.
