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LG Electronics 32LH7000 manual

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Table of contents for the manual

  • Page 1

    LCD TV SER VICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. CHASSIS : LD91D MODEL : 32LH7000 32LH7000-ZA North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com Internal Use Only Downloaded From TV-Manual.com Manuals[...]

  • Page 2

    LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes - 2 - CONTENTS CONTENTS .............................................................................................. 2 PRODUCT SAFETY ..................................................................................3 SPECIFICA [...]

  • Page 3

    LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes - 3 - SAFETY PRECAUTIONS Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by i n t h e Schematic Diagram and Exploded View. It is essential that these spe[...]

  • Page 4

    LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes - 4 - 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 betw[...]

  • Page 5

    LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes - 5 - 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 shou[...]

  • Page 6

    LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes - 6 - SPECIFICA TION NOTE : Specifications and others are subject to change without notice for improvement . 4. General specification 1. Application range This specification is applied to the LCD TV used LD91D chassis. 2. Requirem[...]

  • Page 7

    5. Chroma& Brightness (1) Module optical specification 1) Stable for approximately 60 minutes in a dark environment at 25ºC 2) Operating Ambient Humidity : Min 10, Max 90 %RH 3) Supply Voltage : 24V 4) Frame Frequency : 120Hz (2) Chroma (PSM: Vivid, Color Temperature: Cool) - except “RGB PC Mode PSM:Standard,Color Temperature:Medium” **The[...]

  • Page 8

    - 8 - LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes 6. Component V ideo Input (Y , P B , P R ) No Specification Remark Resolution H-freq(kHz) V-freq(Hz) 1. 720x480 15.73 60.00 SDTV,DVD 480i 2. 720x480 15.63 59.94 SDTV,DVD 480i 3. 720x480 31.47 59.94 480p 4. 720x480 31.50 60.0[...]

  • Page 9

    LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes - 9 - 8. HDMI Input (PC/DTV) (1) DTV Mode No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark 1 720x480 15.734 /15.6 59.94 /60 27.00 SDTV 480I 2 720x480 31.469 /31.5 59.94 /60 27.00/27.03 SDTV 480P 3 720x576 15.[...]

  • Page 10

    LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes - 10 - ADJUSTMENT INSTRUCTION 1. Application Range This specification sheet is applied to all of the LCD TV with LD91D chassis. 2. Designation 1) The adjustment is according to the order which is designated and which must be follo[...]

  • Page 11

    4) Updating is staring. 5) Fishing the version uploading, you have to put USB stick and “AC Power” off. 6) After putting “AC Power” on and check updated version on your TV. * If downloading version is more high than your TV have, TV can lost all channel data. In this case, you have to channel recover. if all channel data is cleared, you did[...]

  • Page 12

    LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes - 12 - * Connecting picture of the measuring instrument (On Automatic control ) Inside PATTERN is used when W/B is controlled. Connect to auto controller or push Adjustment R/C POWER ON -> Enter the mode of White-Balance, the p[...]

  • Page 13

    * Edid data and Model option download (RS232) - Manual Download * Caution Use the proper signal cable for EDID Download - Analog EDID : Pin3 exists - Digital EDID : Pin3 exists (1) Analog Data 128Byte (2Bi) (2) DIGITAL DATA(HDMI-1/2/3/4) 256Byte * Detail EDID Options are below ⓐ Product ID ⓑ Serial No: Controlled on production line. ⓒ Month, [...]

  • Page 14

    - 14 - LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes 5. Serial number D/L • press “Power on” key of service remocon. (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 Di[...]

  • Page 15

    LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes - 15 - 1. TV/CA TV doesn’t display TROUBLESHOOTING 2. DTV doesn’t display Ch eck th e o u tp u t d ata o f IC104 in th e Jack Bo ard Pin 52. Can y o u see t h e n o rmal sign al? NO Co u l d y o u measu re v o ltag e o f IC104[...]

  • Page 16

    LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes - 16 - 3. A V 1/2 doesn’t display Ch eck JK 200, JK20 1 Can y o u see t h e n o rmal w av efo rm? NO JK20 0, JK20 1 ma y h ave p r o b lem. Rep l ace th is Jack. Ch eck th e o u t p u t o f Main IC(IC100). Esp ecially y o u sh o[...]

  • Page 17

    LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes - 17 - 5. RGB PC doesn’t display Ch eck P30 0 , Can y o u see t h e n o rmal w av efo rm? NO JP300 ma y h av e p r o b lem. Rep l ace th is Jack. Ch eck th e in pu t o f RGB Au d i o s w itch (IC405 in th e Jack Bo ard ) , Can y[...]

  • Page 18

    - 18 - LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes 6. HDMI doesn’t display Check input c onnect JK600, JK601, JK602, JK60 3 Can y o u see t h e n o rmal w av efo rm? Ch eck DD C c o mmu n i cation lin es(IC600, IC601) Ch eck th e in pu t o f HDMI Switch (IC600) Th i s sig[...]

  • Page 19

    LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes - 19 - BLOCK DIAGRAM RGB COMPONENT F-SCART AV3 CLK,ERR,SYN,DATA[0] CVBS, Y/C DDR2 SDRAM (256MB) IC300 NAND Flash HYNIX IC402 URSA_C/D[10bit] USB Digital amp (NTP3100) IC701 YPbPr CVBS CVBS I2S PC RGB, H/V SYNC FHD 100Hz Panel 74LV[...]

  • Page 20

    - 20 - LGE Internal Use Only Copyright LG Electronics. Inc. All right reserved. Only for training and service purposes 300 200 400 530 540 820 550 830 570 A5 801 805 804 803 802 806 900 910 120 560 122 123 301 310 500 580 A10 A2 510 EXPLODED VIEW Many electrical and mechanical parts in this chassis have special safety-related characteristics. These[...]

  • Page 21

    ISP_TXD EEPROM_SDA USB_DM USB_DP FE_TUNER_SDA 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. HY27US08121B[...]

  • 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. SC1_CVBS_IN FE_VMAIN AV_CVBS_IN S_Y_IN AV_R_OUT 004:J15 S_[...]

  • Page 23

    +1.8V_DDR 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. 10uF C329 10uF C314 0.1uF C340 0.1uF C341 0.1uF [...]

  • Page 24

    +5V_ST VGA_EEPROM_WP ENKMC2838-T112 D400 A1 C A2 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. USB_DP US[...]

  • Page 25

    PCM_5V_CTL RSR025P03 Q501 S D G 2SC3052 Q500 E B C 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. +5V_CI_[...]

  • Page 26

    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. CK-_HDMI4 DDC_SDA_1 D0+_HDMI3 D0-_HDMI2 DDC_SCL_4 D0-_HDMI[...]

  • Page 27

    0.1uF 50V C729 OPT 0.1uF 50V C749 0.1uF 50V C735 SPK_R+ 007:AA17 POWER_DET 22000pF 50V C732 SPK_R- 007:AA17 MS_LRCK 002:V8 +24V_AMP 0.1uF 50V C728 4.7K R730 AMP_MUTE 002:C25 0.1uF 50V C733 OPT SDA_SUB/AMP 001:L3;004:Y11 SPK_L- 007:AA18 0.1uF 50V C750 4.7K R732 MS_LRCH 002:V8 SPK_L+ 007:AA18 MS_SCK 002:V8 AUDIO_MASTER_CLK 002:V8 +24V_AMP 0.1uF 50V C[...]

  • Page 28

    0.1uF 50V C842 PANEL_POWER +5V_ST +3.3V_ST +5V_GENERAL SI4925BDY Q806 3 S2 2 G1 4 G2 1 S1 5 D2_1 6 D2_2 7 D1_1 8 D1_2 +12V PANEL_CTL 001:AK20 +5V_ST +5V_ST 10K R832 OPT 10K R829 +3.3V_AVDD_MPLL POWER_ON/RL_ON +5V_CI +3.3V_ST 22K R837 22K R839 10K R833 10K R818 10K R821 PWM_DIM +5V_GENERAL 10K OPT R823 +24V INV_CTL 1uF 25V C804 OPT A_DIM 001:W12 +3.[...]

  • Page 29

    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. BLM18PG121SN1D L903 +3.3V_MEMC +1.26V_MEMC BLM18PG121SN1D [...]

  • 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. 56 AR1000 56 AR1002 56 AR1001 56 AR1003 22 AR1013 22 AR101[...]

  • 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. TUNER_CVBS_IF_P 47 R132 0.1uF C132 +5V_TUNER IF_AGC A_1.2V[...]

  • 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. 330pF 50V C203 SCART1_DET 75 R209 330pF 50V C212 OPT C200 [...]

  • Page 33

    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. DSUB_B 002:E7 10K R308 1K R329 DDC_SCL/UART_RX 75 R331 10K[...]

  • 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. 4.7uF 16V C442 100 R435 10K R430 100 R433 4.7uF 16V C440 1[...]

  • Page 35

    Feb., 2009 Printed in Korea P/NO : MFL58858405 Downloaded From TV-Manual.com Manuals[...]