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Manual LG Electronics 42LM760T-ZB

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  • LG Electronics 42LM760T-ZB - page 1

    Printed in Korea P/NO : MFL67360907 (1203-REV00) CHASSIS : LD22E MODEL: 42LM760S/760T 42LM760S/760T -ZB 42LM761S/761T 42LM761S/761T -ZA 42LM765S/765T 42LM765S/765T -ZD CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. LED LCD TV SER VICE MANUAL North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgs ...

  • LG Electronics 42LM760T-ZB - page 2

    - 2 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes CONTENTS CONTENTS .............................................................................................. 2 SAFETY PRECAUTIONS ........................................................................ 3 SERVICING PRECAUTIO ...

  • LG Electronics 42LM760T-ZB - page 3

    - 3 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 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 ...

  • LG Electronics 42LM760T-ZB - page 4

    - 4 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes SER VICING 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 ...

  • LG Electronics 42LM760T-ZB - page 5

    - 5 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes IC Remove/Replacement Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent at against the cir- cuit foil. When holes are the slotted type, the following technique shoul ...

  • LG Electronics 42LM760T-ZB - page 6

    - 6 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes SPECIFICA TION NOTE : Specifications and others are subject to change without notice for improvement . 1. Application range This specification is applied to the LCD TV used LD22E chassis. 2. Requirement for T est Each part is te ...

  • LG Electronics 42LM760T-ZB - page 7

    - 7 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes No. Item Specication Remarks 2 Broadcasting system 1) P AL-BG 2) P AL-DK 3) P AL-I/I’ 4) SECAM L/L ’, DK, BG, I 5) DVB-T 6) DVB-C 7) DVB-T2 8) DVB-S DVB-S: Satellite 3 Receiving system Analog : Upper Heterodyne Digital : ...

  • LG Electronics 42LM760T-ZB - page 8

    - 8 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 5. Component V ideo Input (Y , C b /P b , C r /P r ) 6. RGB input (PC) No. Resolution H-freq(kHz) V -freq(Hz) Porposed 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 7 ...

  • LG Electronics 42LM760T-ZB - page 9

    - 9 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 7. HDMI Input 7.1. DTV mode No. Resolution H-freq(kHz) V -freq.(kHz) Proposed 1. 640*480 31.469 / 31.5 59.94/60 SDTV 480P 2. 720*480 31.469 / 31.5 59.94 / 60 SDTV 480P 3. 720*576 31.25 50 SDTV 576P 4. 720*576 15.625 50 SDTV 576I ...

  • LG Electronics 42LM760T-ZB - page 10

    - 10 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes ADJUSTMENT INSTRUCTION 1. Application Range This specification sheet is applied to all of the LED LCD TV with LD22E chassis. 2. Designation (1) Because this is not a hot chassis, it is not necessary to use an isolation transfor ...

  • LG Electronics 42LM760T-ZB - page 11

    - 1 1 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 3.2. MAC address D/L, CI+ key D/L, Widevine key D/L, ESN D/L Connect: USB port Communication Prot connection ▪ Com 1,2,3,4 and 1 15200(Baudrate) Mode check: Online Only ▪ check the test process: DETECT -> MAC -> CI - ...

  • LG Electronics 42LM760T-ZB - page 12

    - 12 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 3.5. Model name & Serial number Download 3.5.1. Model name & Serial number D/L ▪ Press "Power on" key of service remote control. (Baud rate : 1 15200 bps) ▪ Connect RS232 Signal Cable to RS-232 Jack. ▪ W ...

  • LG Electronics 42LM760T-ZB - page 13

    - 13 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 4. Manual Adjustment * ADC adjustment is not needed because of OTP(Auto ADC adjustment) 4 . 1 EDID(The Extended Display Identification Data)/DDC(Display Data Channel) download 4.1.1. Overview It is a VESA regulation. A PC or a ...

  • LG Electronics 42LM760T-ZB - page 14

    - 14 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 4.2. White Balance Adjustment 4.2.1. Overview ▪ W/B adj. Objective & How-it-works (1) Objective: T o reduce each Panel's W/B deviation (2) How-it-works : When R/G/B gain in the OSD is at 192, it means the panel is at ...

  • LG Electronics 42LM760T-ZB - page 15

    - 15 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes ▪ Adjustment condition and cautionary items 1) Lighting condition in surrounding area Surrounding lighting should be lower 10 lux. Try to isolate adj. area into dark surrounding. 2) Probe location : Color Analyzer(CA-210) pro ...

  • LG Electronics 42LM760T-ZB - page 16

    - 16 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 4.6. 3D function test (Pattern Generator MSHG-600, MSPG-6100[Support HDMI1.4]) * HDMI mode NO. 872 , pattern No.83 (1) Please input 3D test pattern like below . (2) When 3D OSD appear automatically , then select OK key . (3) Do ...

  • LG Electronics 42LM760T-ZB - page 17

    - 17 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes 4.12. GND and Internal Pressure check 4.12.1. Method (1) GND & Internal Pressure auto-check preparation - Check that Power cord is fully inserted to the SET . (If loose, re-insert) (2) Perform GND & Internal Pressure au ...

  • LG Electronics 42LM760T-ZB - page 18

    - 18 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes L/R In SPDIF OUT USB Audio AMP ( STA) I2S Out MTK jpG jpG P_TS CVBS P_TS T/C Demod IF(+/-) USB1 RS-232C PC-RGB PC-AUDIO OPTIC LAN SYSTEM DDR3 X 1600 X 16 (2Gb) HDMI1 HDMI2 HDMI3 Side Rear RGB,H/V Etherne ...

  • LG Electronics 42LM760T-ZB - page 19

    - 19 - LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved. Only for training and service purposes A22 A2 A21 A5 A10 A G1 900 300 200 400 540 521 530 800 810 710 700 910 560 410 570 120 510 501 500 310 * Set + Stand * Stand Base + Body L V1 L V2 A G2 AG3 122 Dual Play 123 Clip T ype (Option) EXPLODED VIEW Many electrical and ...

  • LG Electronics 42LM760T-ZB - page 20

    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. CI_DATA[5] CI_DATA[7] MT5369_TS_OUT[2] CI_DATA[2] CI_DATA[ ...

  • LG Electronics 42LM760T-ZB - page 21

    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. CI_ADDR[3] CI_DATA[7] CI_ADDR[4] CI_DATA[2] MT5369_TS_OUT[ ...

  • LG Electronics 42LM760T-ZB - page 22

    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. C532 0.1uF +3.3V_NORMAL POWER_ON/OFF1 C544 0.1uF 16V C535 ...

  • LG Electronics 42LM760T-ZB - page 23

    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. SC_FB_SOC C605 10pF EU C614 0.01uF EU R610 51K 1/16W 1% EU ...

  • LG Electronics 42LM760T-ZB - page 24

    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. BRDQ[30] BRDQ[18] BRA[10] ARDQ[30] BRA[1] BRDQ[22] BRA[4] ...

  • LG Electronics 42LM760T-ZB - page 25

    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. MT5369_TS_IN[5] CI_TS_DATA[5] MT5369_TS_IN[3] CI_TS_DATA[6 ...

  • LG Electronics 42LM760T-ZB - page 26

    THERMAL THERMAL THERMAL THERMAL 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. C2432 0.01uF 50V L2407 BLM ...

  • LG Electronics 42LM760T-ZB - page 27

    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. EEPROM_SCL +3.5V_ST GND POWER_ON/OFF2_4 EDID_WP R3023 4.7M ...

  • LG Electronics 42LM760T-ZB - page 28

    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. D1-_HDMI1_SOC D0+_HDMI1_SOC R3303 100 R3319 22 HDMI_EXT_ED ...

  • LG Electronics 42LM760T-ZB - page 29

    Fiber Optic 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. JK3601 KJA-PH-0-0177 3 DETECT 4 L 5 GND 1 R +3 ...

  • LG Electronics 42LM760T-ZB - page 30

    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. R3700 10K HP_OUT HP_LOUT +3.3V_NORMAL JK3700 KJA-PH-0-0177 ...

  • LG Electronics 42LM760T-ZB - page 31

    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. AV1_R_IN C3802 0.1uF RS232 C3803 0.1uF RS232 COMP1_Pr +3.5 ...

  • LG Electronics 42LM760T-ZB - page 32

    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. IR R4118 10K 5% L4100 BLM18PG121SN1D C4102 0.1uF LED_B/GP4 ...

  • LG Electronics 42LM760T-ZB - page 33

    USB DOWN STREAM USB DOWN STREAM USB DOWN STREAM THERMAL THERMAL THERMAL 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 T ...

  • LG Electronics 42LM760T-ZB - page 34

    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. SC_L_IN C4602 4700pF EU Q4601 MMBT3904(NXP) EU E B C C4604 ...

  • LG Electronics 42LM760T-ZB - page 35

    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. M_RFModule_ISP M_REMOTE_RX M_REMOTE_TX +3.3V_NORMAL L4800 ...

  • LG Electronics 42LM760T-ZB - page 36

    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. EPHY_RDN C5002 0.1uF 16V C5001 0.01uF 50V EPHY_TDP EPHY_TD ...

  • LG Electronics 42LM760T-ZB - page 37

    THERMAL 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. I2C_SDA1 +3.5V_ST C5818 0.22uF 50V SPK_R- R5802 10 ...

  • LG Electronics 42LM760T-ZB - page 38

    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. SIGN600005 SCART_Rout SCART_MUTE SCART_Lout DTV/MNT_R_OUT ...

  • LG Electronics 42LM760T-ZB - page 39

    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. HP_ROUT_MAIN R6100 4.7K HP_LOUT_AMP R6104 OPT 100K R6105 4 ...

  • LG Electronics 42LM760T-ZB - page 40

    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. Q6201 AO3407A CI G D S +5V_CI_ON C6207 4.7uF 10V OPT R6218 ...

  • LG Electronics 42LM760T-ZB - page 41

    THERMAL 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. FE_TS_DATA[5] FE_TS_DATA[4] FE_TS_DATA[2] FE_TS_DA ...

  • LG Electronics 42LM760T-ZB - page 42

    THERMAL 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. A_GND LNB_OUT DCDC_GND DCDC_GND A_GND A_GND R6901 ...

  • LG Electronics 42LM760T-ZB - page 43

    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. EXT_AMP_MUTE AUDIO_L_OUT_COMMERCIAL C7005 0.1uF 50V +24V + ...

  • LG Electronics 42LM760T-ZB - page 44

    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. TXC3N TXACLKN C7102 0.1uF 50V OPT TXA0N C7100 10uF 16V OPT ...

  • LG Electronics 42LM760T-ZB - page 45

    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. I2C_SCL1 L/DIM0_SCLK R7601 10K L/DIM_OUT +3.3V_NORMAL L/DI ...

  • LG Electronics 42LM760T-ZB - page 46

    THERMAL THERMAL 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. VCOM_N MCLK DISCHG R7709 0 1/16W R7743 0 1 ...

  • LG Electronics 42LM760T-ZB - page 47

    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. EMMC_DATA[5] EMMC_DATA[0] EMMC_DATA[2] EMMC_DATA[1] EMMC_D ...

  • LG Electronics 42LM760T-ZB - page 48

    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. +3.5V_ST L8900 BLM18PG121SN1D LOGO_LIGHT P8900 12507WR-03L ...

  • LG Electronics 42LM760T-ZB - page 49

    ...

  • LG Electronics 42LM760T-ZB - page 50

    2012 LED/LCD TV Engineering guide < Applicable Model > XXLM760S-ZB Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 42LM760T-ZB - page 51

    ◈ CONTENT ◈ New features Main PCBs Block Diagrams, IIC Map Structure of TV set and connection of sub ass’ys New sub ass’ys - Instruction of new sub ass’ys - How to use tool - Download Adjust way of new features (widevine…) Repair guide The latest issue and concerning issue Copyright © 2012 LG Electronics. Inc. All rights reserved. Only ...

  • LG Electronics 42LM760T-ZB - page 52

    EPI Interface EPI(Embedded Point-Point Interface) Features • Point-Point topolo gy (support 2 Pair op tion ) • CDR (Clock Data Recovery) • Bandwidth up to 1.85Gbps/pair at FHD 120Hz 10 bit applicatio n • Lock signal cascading and feedback to T-Con • Embedded Control Data Merits • Better reliability on comm on noise • No data skew an d ...

  • LG Electronics 42LM760T-ZB - page 53

    EPI Interface (mini-LVDS vs. EPI) Comparison HF mini-LVDS What to change EPI (Embedded cloc k P-to-P Interface) - Difficult to upgrade bandwidth limit - Multiple number of wires needed for higher bandwidth HF mini- LVDS FHD (10bit) 60Hz 120Hz 240Hz No. of Signal 36 36 72 Connector 60pin (2ea) 60pin (2ea) 80pin (2ea) - Better reliability on common n ...

  • LG Electronics 42LM760T-ZB - page 54

    HF mini-LVDS EPI Topology Protocol Features @10bit, FHD120 • Multi Drop • Data rate: 660Mbps • External clock • Point to Point • Data rate : 1.8Gbps • Embedded clock, Control Merit • Simple structure • Standardization • Fewer Lines : 12 • Embedded clock : low EMI, Clock skew free • Easy to PCB design Demerit • Too many lines ...

  • LG Electronics 42LM760T-ZB - page 55

    Main PCB for Broadband Main + TCON all in one To PSU 1 2 6 4 1 Main processor, DDR Memory eMMC Memory 2 3 4 Micom for Key/IR sensing PMIC Audio AMP (10W+10W) xxLM760S-ZB Soft touch +IR Front Spk To module 5 5 EPI Wafer G/S model 2 1 LNB IC Only G/S model 1 2 Chassis : LD22E PCB P/No : EAX64307905 3 6 Level shifter WIFI RF Assy Copyright © 2012 LG ...

  • LG Electronics 42LM760T-ZB - page 56

    MTK5369 Block Diagram( LM76 ) L/R In SPDIF OUT USB Audio AM P (NTP7500 or STA) I2S Ou t MTK CI slot CI slot P_TS CVBS P_TS T/C Demod IF(+/-) USB1 RS-232 C PC-RGB PC-AUDIO OPTIC LA N SYSTEM DDR3 X 1600 X 16 (2Gb) HDMI1 HDMI2 HDMI3 Side Rear RGB,H/V Ethernet CVBS UA RT SYSTEM EEPROM X 1 (256Kb ) HDMI MUX (HDCP EEPROM) M-Remote Module Air / Cable TUNE ...

  • LG Electronics 42LM760T-ZB - page 57

    Jack Interface [PR0P ],[PB0P],[ Y0P] [OPCTRL8] [VDACX_OUT] [VDACY_OUT] [AUOUTL0] [ADIN0_SRV] [CVBS2P] [AIN0_L_ADDC] [AIN0_R_AADC] [SPDIF_OUT] [AUOUTR0] Main SoC MTK [SOY0] [Y1P],[ PB1P],[P R1P] [OPCTRL 9] [AL0_ADAC] [AR0_ADAC [VGA_SCL] [VGA_SDA] [OPCTRL 7] [VSYNC], [HSYNC] [RP],[GP],[ BP] [ASPDIF0] SPDIF SPDIF_O UT [AIN2_L_AADC] COMP 1 PHONE JACK C ...

  • LG Electronics 42LM760T-ZB - page 58

    GP4 Backend block diagram (EPI & T-con) IC7700 TPS65178 IC7701 TPS65198 50Pin EPI LEFT 50Pin EPI RIGHT VCOM, G IP _ RST R(0 옴 ) OPT DISCHG VGL_I VGL_I VGH_ODD, VGH_EVEN VGH_R, VGH_F, VST R (0 옴 ) CLK1~6_I CLK1~6 VCOM_P/N/LOOP VGL_FB CTRLN VCC CTRLP VGH_FB VDD SWP SWN Main SoC MTK R (47 옴 ) EO_SOC MCLK_SOC GST_SOC GCLK_SOC GCLK MCLK GST EO ...

  • LG Electronics 42LM760T-ZB - page 59

    GP4 Backend block diagram (EPI & T-Con) Main SoC MTK IC7700 TPS65178 50Pin EPI LEFT 50Pin EPI RIGHT GMA[1][3][9][10][12 ][14][15][16][18] GMA[4][5][7][12][15] EPI_LOCK3 TXA1N/P, T XACLKN/P, TXA 4N/P EPI CH1/2/3 EPI CH4/5/6 TXA0N/P, TXB1 N/P, TXB2N/P Z_OUT Vcore VDD H_VDD Vcore H_VDD VDD VCC18 VCC18 VCOMLFB VCOMRFB EPI_LOCK6 EPI_ LOCK6_S OURCE V ...

  • LG Electronics 42LM760T-ZB - page 60

    GP4 Backend block diagram (LVDS Tx & Local Dimming) LVDS Tx Block Main SoC MTK LVDS_SEL BIT_SEL_LOW 51Pin LVDS Output PANEL_VC C (+12V) 41Pin LVDS Output 10-bit (R) Dual-link LVDS Output 24 10-bit (R) 24 Dual-link LVDS Output • LVDS_SEL : “H”=JEIDA, “L” or NC=VESA (LGD) • BIT_SEL : “H” o r NC = 10-bit, “L” = 8-bit L/DIMO_SCL ...

  • LG Electronics 42LM760T-ZB - page 61

    Interconnection - 1 1 Main PCB 2 Power Board 3 Tact key PCB T-con Driver 1 2 3 4 5 Main / LPB 24Pin cable Main / Module EPI cable 50& 50PIN LED driver / PSU 10Pin (IR+Touch) Cable SPK Cable Local Dimming Cable [PCBs] [Cables] 6 1 2 3 1 2 3 4 5 6 xxLM760S-ZA 7 RF Assy Cable 7 8 WIFI Assy Cable 8 4 5 4 RF Assy 5 WIFI Assy Copyright © 2012 LG Ele ...

  • LG Electronics 42LM760T-ZB - page 62

    2012Y IR + Soft touch PCB Pinmap Circuit Block Diagram Pin Configuration KEY1, KEY2 Voltage (Tolerance of voltage ± 0.2V) Ass’y Picture Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 42LM760T-ZB - page 63

    2012Y IR + Soft Touch LED Lighting Scenario 구분 Spec 내용 비고 Power Indicator UI - 12Y GP4 High(L9), GP4 Mid(MTK), GP4 Low(S7LR2) Æ “ Po wer Light” UI Delete compared with 11Y(GP3 model) - 11Y Carry Over Model : 12Y same Power LED scenario process Æ “ Po wer Light “ UI Delete, The way of 11Y Soft Touch Ass’y is us ed. White LED ...

  • LG Electronics 42LM760T-ZB - page 64

    Introductions of GP4 Sensor (Touch IC) Touch Key Threshold Level (Ta = 25ºC ) 1. Verify the number of THR at first. 2. Once you correctly touch Touch b u tt on for more than 1 sec, yo u can see a Touch data w hile yo u keep touchi ng the button. 3. Keep in mind that you can onl y read the Touch data during touch status. 4. It doesn’t matter that ...

  • LG Electronics 42LM760T-ZB - page 65

    Introductions of GP4 Sensor (Touch IC) Touch EEPROM Register change with USB port 1. Write all of the address, value ( Hex ) as a below . capable of only Touch.txt file based on the left picture 2. Make the file [ Filename : ‘Touch.txt’ ] and move it to USB (T he outermost area, Don’t move it to any folder) 3. Connect USB to TV and press butt ...

  • LG Electronics 42LM760T-ZB - page 66

    Introductions of 12Y RF ass’y + Magic Remote control Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 42LM760T-ZB - page 67

    1. System Remote RF Receiver TV UART or USB RF  Pairing Information Transmission (Send to TV after Paired) • Static Calibration Da ta (Bypass only) • Remote FW ver. (S ave also in Receiver) • BD_ADDR (Save also in Receiver) • Pairing Information Tr ansmission Sequence • When it is paired, the remote sends packets(pairi ng success, F/W ...

  • LG Electronics 42LM760T-ZB - page 68

    2. Remote Buttons (M3 vs. M4) BUTTON RF Unpaired IR_CODE RF Paired RF_CODE IR continuous repeat ETC. Phsica l Buttons POWER 0x08 0x 08 Y IR only BACK 0x28 0x8028 Y HOME 0x7C 0x807C Y ← 0x07 0x8007 Y → 0x06 0x8006 Y ↑ 0x40 0x8040 Y ↓ 0x41 0x8041 Y OK 0x75 0x8044 Y CH + 0x00 0x8000 Y CH - 0x01 0x8001 Y VOL + 0x02 0x8002 Y VOL - 0x03 0x8003 Y ...

  • LG Electronics 42LM760T-ZB - page 69

    MPU-3050 (Gyro) (Invensense) LIS331DLH(Accel.) (STMicro) BCM20733M (BROAD COM) Bluetooth 3.0 Key Button ( 4 x 5 ) AA x 2 Battery DC-DC 2.8V LDO Power Management Bluetooth Remocon Blueto o th Receiver BCM20702M (BROAD COM) Bluetooth 4.0 Antenna Connector X-tal 20 MHz Antenna X-tal 24 MHz 3. M4 Block Diagram 2.8V LDO 256Kbit (E 2 PROM) 512Kbit (Seria ...

  • LG Electronics 42LM760T-ZB - page 70

    주요 Item IC Manufacturer Function Remocon Voice Voice Codec WM8950 Wolfs on 16KHz Sampling of Audio data MEMS Mic. SPU0414HR5H Know les Sensing Voice Motion Sensor Gyro Sensor ITG3050 Invensense Sensing angular velocit y of X, Y, Z-axis Accelerometer MMA8452 Stmicro Sensing devic e tilt (Pitch & Roll angle) RF + Micom RF Antenna SDBTPTR3015 ...

  • LG Electronics 42LM760T-ZB - page 71

    5. RF Pairing / Un-pairing Method Method Description RF Pairing  Method1 – If unpaired, just press "OK" button. – If paired, press "OK" button after unpairing.  Method 2 (Repairing) – Press “BACK" button for 5 sec. • When do pairin g, the remote should make pa iring request IR signal(0x29) to TV. • When TV ...

  • LG Electronics 42LM760T-ZB - page 72

    Introductions of 12Y WIFI built in ass’y Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 42LM760T-ZB - page 73

    WIFI Built in ass’y feature(LGIT) WIFI built in feature PIN USB in terf ace 1 5V 2 DM 3 DP 4 GND -P i n m a p - Block diagram Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 42LM760T-ZB - page 74

    WIFI Built in Block-diagram(Arcadyan) Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 42LM760T-ZB - page 75

    WIFI Built in ass’y Specification Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 42LM760T-ZB - page 76

    12Y Widevine & HDCP 2.0 & NETFLX 1. Widevine? 2. HDCP 2.0 & NETFLIX? 3. DTCP? 4. Changed BOM Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 42LM760T-ZB - page 77

    1. Widevine? [Widevine] Widevine is the Solution(Library) o ffering Adaptive Streaming and DRM. In BBTV, when special CP do servi ce, this module is required key. Currently CP which is requested to widevine , is typically Austra lian Bigpond Live and North American CinemaNow. Furthermore, because the future will be the sp read of CP, widevine key d ...

  • LG Electronics 42LM760T-ZB - page 78

     HDCP 9 High-bandwidth Digital Content Protection 9 Protect high-value digital motion pictures, television programs and au dio against unauthorized interception and co pying between a digital set top box or digital video recorder and a digital TV or PC. 9 Specification developed by Intel Corpor ation to protect digital entertainment across the D ...

  • LG Electronics 42LM760T-ZB - page 79

    3. DTCP? [DTCP] The Digital Transmission Content Protecti on Specification defines a cryptogrphic protocol for protecting audio/video entertai nment content from unauthorized copying, intercepting, and tampering as it traverses digital transmission mechanisms such as a high-performance serial bus that conforms to the IEEE 1394-1995 standard. On ly ...

  • LG Electronics 42LM760T-ZB - page 80

    4. Changed BOM As-Was Current Æ 추가  Add Item 1.Marlin (Yes/No) 2 .CNTV (Yes/No) 3.HDCP Tx (Yes/No) 4.DTCP Rx (Yes/No) 5.HDCP Rx (Yes/No) 주 3 ) CNTV [Yes] : China Smart TV Onl y Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 42LM760T-ZB - page 81

    4. Changed BOM Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 42LM760T-ZB - page 82

    Contents of LCD TV Standard Repair Process No. Error symptom (High category) Error symptom (Mid cate gory) Page Remarks 1 A. Video error No video/Normal audio 1 2 No video/No audio 2 3 Video error, video lag/stop , fail tunning 3, 4 4 Color error 5 5 Vertical/Horizontal bar, residual image, light spot, external device color error 6 6 B. Power error ...

  • LG Electronics 42LM760T-ZB - page 83

    Contents of LCD TV Standard Repair Process Detail Technical Manual No. Error symptom Content Page Remarks 1 A. Video error_ No video/Normal audio Check LCD back light with naked eye A1 2 LED driver B+ 24V measuring method A2 3 Check White Balance value A3 4 Power Board voltage measuring method A4 6 A. Video error_ No video/Video lag/stop T UNER inp ...

  • LG Electronics 42LM760T-ZB - page 84

    Normal audio Y N Move to No video/No audio No video Normal audio Check Back Light On with naked ey e On Y N Check Power Board 12v,3.5v etc. Normal voltage Y N Replace T-con Board or module And Adjust VCOM Repair Power Board or parts Check Power Board 24v output Normal voltage Y Replace Inverter or module N Repair Power Board or parts End Always che ...

  • LG Electronics 42LM760T-ZB - page 85

    Normal voltage? Check various voltages of Power Board ( 3.5V,12V,20V or 24V…) No Video/ No audio Check and replace MAIN B/D Y Replace Power Board and repair parts N End Standard Repair Process A. Video error No video/ No audio ☞ A4 Establis hed date Revised date 2/13 LCD TV Error symptom 2010. 12 .14 Copyright © 2012 LG Electronics. Inc. All r ...

  • LG Electronics 42LM760T-ZB - page 86

    A. Picture Problem Picture bro k en/ Freezing Y N ☞ A6 N Check R F Signal le vel Normal Signal? Check RF Cable Connection 1. Reconnec tion 2. Install Bo oste r Check S/W Version Booster menu On → Off: Che c k Off → On: Check S/W Upgrade Check w hether oth er equipments hav e probl em or not. (By connecting RF Cabl e at other equipment) → DV ...

  • LG Electronics 42LM760T-ZB - page 87

    A. Picture Problem (DVB-S/S2) Tuning fail, Pictur e broken/ Free zing Y N ☞ A6 Check R F Signal le vel Normal Signal? Check S/W Version S/W Upgrade SVC Bulletin? Normal Picture? Y N Y Close Check RF signal cable (DVB satellite signal or not) Check whether other eq uipments have problem or not. (By connecting RF Cable at other equipment) → Set-T ...

  • LG Electronics 42LM760T-ZB - page 88

    Color error? Y N ※ Check and replace Link Cable (LVDS) and contact condition Y N Replace Main B/D Color error? Check error color input mode Check color by input -External Input -COMPONENT - RGB - HDMI/DVI Y External device /Cable normal External Input/ Component error Check external device and cable Y External device /Cable normal RGB/ HDMI/DVI e ...

  • LG Electronics 42LM760T-ZB - page 89

    Screen normal? N Y Check external device connection condition Y N Check and replace Link Cable Normal? Y N Screen normal? Replace Main B/D (adjust VCOM) Replace module Check color condi tion by input -External Input -Component - RGB - HDMI/DVI End Vertical/Horizontal bar, r esidual image, light spot Request repair for external device A. Video error ...

  • LG Electronics 42LM760T-ZB - page 90

    B. Power error No power Power LED On? Y N DC Power on by pressing Power Key On Remote control Y N Normal operation? Check Power On ‘”High” Check Power cord was inserted properly Check Power LED Replace Power B/D Measure voltage of each o u tpu t of Power B/D N Y Normal voltage? Replace Main B/D N Y OK? Replace Main B/D N Y Normal? Check ST-BY ...

  • LG Electronics 42LM760T-ZB - page 91

    B. Power error Off when on, off while viewing, po wer auto on/off Error? N Y Check Power Off Mode Fix A/C cord & Outlet and check each 3 phase out Check A/C cord Check for all 3- phase power out Check outlet Replace Main B/D CPU Abnormal (If Power Off mode is not display ed) Check Power B/D vol t ag e Y N Replace Main B/D Normal voltage? Replac ...

  • LG Electronics 42LM760T-ZB - page 92

    No audio Screen normal Check user menu > Speaker off Off N Y Cancel OFF Check audio B+ 24V of Power Board Normal vol t ag e Y N Replace Power Board and repair parts Check Speaker disconnection N Y Replace Speaker Replace MAIN Board End C. Audio error No audio/ Normal v id eo ☞ A24 ☞ A25 Disconnection Establis hed date Revised date 8/13 LCD T ...

  • LG Electronics 42LM760T-ZB - page 93

    → abnormal audio/di sconti nuation/n oise is same af ter “Check input signal” compared to No audio C. Audio error Wrecked audi o/ disco ntinu ation /noise Wrecked audio/ Discontinuation/ Noise for all audio Check and replace speaker and connector Wrecked audio/ Discontinuation/ Noise only for D-TV Wrecked audio/ Discontinuation/ Noise only fo ...

  • LG Electronics 42LM760T-ZB - page 94

    D. General Function Problem Remote co ntrol & Local sw itch checking Y N 1. Remote control(R/C) op erating error Check R/C itself Operation Norm al operating? Normal operating? Y Close Replace R/ C If R/C operate, Explain th e customer cause is inter ference from light in room. Check R/C Operat ing When turn off light in room Check & Replac ...

  • LG Electronics 42LM760T-ZB - page 95

    Check technical informatio n - Fix information - S/W Version N Y Technical information? Check input signal Signal input? Y N External Input and Component Recognition error Check and fix externa l devic e/cable RGB,HDMI/ DVI, Optical Recognition error Replace Main B/D Replace Main B/D Fix in accordance with technical information D. Function error Ex ...

  • LG Electronics 42LM760T-ZB - page 96

    Check location of noise Identify nose type Circuit noise Replace PSU(wi th LED driver) Replace LED dr iver Mechanic al noise Check location of noise OR ※ When the nose is severe, rep lace the module (For models with fix infor mation, upgrade the S/W or provide th e d escripti o n) ※ If there is a “Tak Tak ” noise from the cabinet, refer to ...

  • LG Electronics 42LM760T-ZB - page 97

    Replace module Zoom par t with exter ior damage Module damage Cabinet damage Replace cabinet Replace remot e controller Remote controller damage Stand dent Replace stand F. Exterior defect Exterior defect Adjust VCOM Establis hed date Revised date 13/13 LCD TV Error symptom Standard Repair Process ☞ A28 2010. 12 .14 Copyright © 2012 LG Electroni ...

  • LG Electronics 42LM760T-ZB - page 98

    Contents of LCD TV Standard Repair Process Detail Technical Manual No. Error symptom Content Page Remark s 21 B. Power error_No power Check front di splay LED A17 22 Check power input Voltage & ST-BY 5V A18 23 Checking method when power is ON A19 24 POWER BOAR D voltage measuring method A4 25 26 B. Power error_Off when on, off while viewing POW ...

  • LG Electronics 42LM760T-ZB - page 99

    Entry met hod 1. Press the ADJ button on the re mote controller fo r adjustment. 2. Enter into White Balance of item 6. 3. After recordin g the R, G, B (GAIN, Cut) value of Color Temp (C ool/Medium/Warm), re- enter the value after r eplacing the MAIN BOARD. Standard Repair Process Detail Technical Manual Check Wh ite Balance value A. Video error_No ...

  • LG Electronics 42LM760T-ZB - page 100

    Standard Repair Process Detail Technical Manual Power Boar d v oltage meas uring m ethod A. Video error_No video/ Audio A5 Established date Revised date Error symptom Content LCD TV Check the DC 24V, 12V, 3.5V. 24 Pin (Power Boar d ↔ Main B oard ) SMAW200-H24S (YEONHO) 1 Power on 2 24V 3 24V 4 24V 5 GND 6 GND 7 GND 8 GND 9 3.5V 10 3.5V 11 3.5V 12 ...

  • LG Electronics 42LM760T-ZB - page 101

    MENU - Æ Set up Æ supp or t - Æ signal test - Æ select channel When the signal is strong, use the attenuator (-10dB, -15 dB, -20dB etc.) Standard Repair Process Detail Technical Manual TUNER input s ignal strengt h checking me thod A. Video error_Video error, video lag/stop <ALL MODELS> A6 Established date Revised date Error symptom Conte ...

  • LG Electronics 42LM760T-ZB - page 102

    Standard Repair Process Detail Technical Manual LCD- TV Version c hecking metho d A. Video error_Video error, video lag/stop 1. Checking method for remote controller for adjustment Press the IN-START with the remote controller for adjustment Version <ALL MODELS> A7 Established date Revised date Error symptom Content LCD TV 2010. 12 .14 Copyri ...

  • LG Electronics 42LM760T-ZB - page 103

    Standard Repair Process Detail Technical Manual LCD TV connection di agram (1) A. Video error _Vertical/Horizontal bar, residual image, light spot As the part connecting to the external in p ut, check the screen condition b y signal A8 Established date Revised date Error symptom Content LCD TV <ALL MODELS> 2010. 12 .14 Copyright © 2012 LG El ...

  • LG Electronics 42LM760T-ZB - page 104

    Checking method: 1. Check the signal st rength or check whether the scr een is normal when the external device is connected. 2. After mea suring each voltage from power supply, finally replace the MAIN BOARD. Standard Repair Process Detail Technical Manual TUNER chec king part A. Video error_Video error, video lag/stop <ALL MODELS> A9 Establi ...

  • LG Electronics 42LM760T-ZB - page 105

    Standard Repair Process Detail Technical Manual Adjustment Test p atte rn - ADJ Key A. Video error_Color error You can view 6 types of patterns using the ADJ Key Checking item : 1. Defective pixel 2. Resi dual image 3. MODUL E error (ADD-BAR,SCAN BAR..) 4.Video error (Classificati on of MODULE or Main-B/D!) A12 Established date Revised date Error s ...

  • LG Electronics 42LM760T-ZB - page 106

    Solder defe ct, CNT Broken T-Con Defect, CNT Broken T-Con Defect, CNT Broken T-Con Defect, CNT Broken Solder defe ct, CNT Broken Solder defe ct, CNT Broken Solder defe ct, CNT Broken Solder defect, CNT Broken Abnormal Power Section Solder defe ct, Short/Crack Abnormal Power Section Solder defe ct, Short/Crack Appendix : Exchange T-Con Board (1) Cop ...

  • LG Electronics 42LM760T-ZB - page 107

    Abnormal Power Section Solder defe ct, Short/Crack Abnormal Power Section Solder defe ct, Short/Crack Fuse Open, Abnormal power section Noise GRADATION GRADAT ION Abnormal Display Appendix : Exchange T-Con Board (2) Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 42LM760T-ZB - page 108

    Appendix : Exchange PSU(LED driver) No Light Dim Light Dim Light Dim Light No picture/Sound Ok Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 42LM760T-ZB - page 109

    Appendix : Exchange the Module (1) Panel Mura, Li ght leakage Press damage Crosstalk Crosstalk Press damage Panel Mura, Li ght leakage Press damage Un-repairable Cases In this case please exchange the module. Copyright © 2012 LG Electronics. Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only ...

  • LG Electronics 42LM760T-ZB - page 110

    Vertical Block Source TAB IC Defect Horizontal Block Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect Vertical Line Source TAB IC Defect Vertical Block Source TAB IC Defect Horizontal Block Gate TAB IC Defect Horizontal line Gate TAB IC Defect Gate TAB IC Defect Horizontal Block Gate TAB IC Defect Appendix : Exchange the Module (2) Un-repai ...

  • LG Electronics 42LM760T-ZB - page 111

    Standard Repair Process Detail Technical Manual Check front displ ay LED B. Power error _No power A17 Established date Revised date Error symptom Content LCD TV ST-BY condition: Red Power ON condition: w hite Front LED control : Menu Æ Option Æ Power Indicator Æ Standby light ON 2010. 12 .14 Copyright © 2012 LG Electronics. Inc. All rights rese ...

  • LG Electronics 42LM760T-ZB - page 112

    Standard Repair Process Detail Technical Manual Check power input voltage and ST-BY 5V B. Power error _No power A18 Established date Revised date Error symptom Content LCD TV For ’10 models, there is no voltage ou t for st-by purpose. When st-by, only 3.5V is normally on. Check the DC 20V/24V, 12V, 3.5V. Edge LED 2010. 12 .14 Edge LED 24 Pin (Pow ...

  • LG Electronics 42LM760T-ZB - page 113

    Standard Repair Process Detail Technical Manual Checking method when po wer is ON B. Power error _No power A19 Established date Revised date Error symptom Content LCD TV Check “power on” pin is high 2010. 12 .14 24 Pin (Power Boar d ↔ Main B oard ) SMAW200-H24S (YEONHO) 1 Power on 2 24V 3 24V 4 24V 5 GND 6 GND 7 GND 8 GND 9 3.5V 10 3.5V 11 3. ...

  • LG Electronics 42LM760T-ZB - page 114

    Entry method 1. Press the IN-START button of the remote controller for adjustment 2. Check the entry into adjustment item 3 Standard Repair Process Detail Technical Manual POWER OFF MODE checking m ethod B. Power error _Off when on, off whi ling viewing <ALL MODELS> A22 Established date Revised date Error symptom Content LCD TV 2010. 12 .14 C ...

  • LG Electronics 42LM760T-ZB - page 115

    Checking metho d 1. Press the MENU button on the remote controller 2. Select the AUDIO function of th e Menu 3. Select TV Speaker from Off to On Standard Repair Process Detail Technical Manual Checking method in menu w hen there is no audi o C. Audio error_No audio/Normal video <ALL MODELS> A24 Established date Revised date Error symptom Cont ...

  • LG Electronics 42LM760T-ZB - page 116

    Checking order when t here is n o audi o ① Check the contact condition of or 24V connector of Main Board ② Measure the 24V input voltage suppli ed from Power Board (If there is no input voltage, remove an d check the connector) ③ Connect the tester RX1 to the speake r terminal and if you hear the Ch ik C hik sound whe n you touch the GND and ...

  • LG Electronics 42LM760T-ZB - page 117

    Checking order 1, 2. Check IR c able c ondition between IR & M ain board. 3. Check the st-by 3.3V on the terminal 6. 4. When checking the Pre-Am p when the power is in ON condition, it is normal w hen the Analog Tester needle moves s l owly , and defective when it does not move at all. Standard Repair Process Detail Technical Manual Remote cont ...

  • LG Electronics 42LM760T-ZB - page 118

    Standard Repair Process Detail Technical Manual Sequence of the Vcom adjustment D. VCOM Adjustment 1. Case ■ LCD module change ■ T-Con board change 2. Equipment ■ Service Remote controller 3. Adjust sequence ■ Press the ‘adj’ key ■ select V-COM ■ As pushing the right or the l eft button on the remote controller, And find the V-COM v ...

Manufacturer LG Electronics Category Flat Panel Television

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All of them are important, but the most important information from the point of view of use of the device are in the user manual LG Electronics 42LM760T-ZB.

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