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LCD TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

CHASSIS : LD84A

MODEL : 32LG3000

32LG3000-ZA

website:http://biz.LGservice.com

Internal Use Only

Содержание 32LG3000

Страница 1: ...LCD TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LD84A MODEL 32LG3000 32LG3000 ZA website http biz LGservice com Internal Use Only ...

Страница 2: ...right 2008 LG Electronics Inc All right reserved Only for training and service purposes CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 10 TROUBLE SHOOTING 14 BLOCK DIAGRAM 20 EXPLODED VIEW 22 SVC SHEET ...

Страница 3: ...fe to operate without damage of electrical shock Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm meter lead in turn to each exposed metallic parts such as antenna term...

Страница 4: ... on your body by touching a known earth ground Alternatively obtain and wear a commercially available discharging wrist strap device which should be removed to prevent potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ES devices place the assembly on a conductive surface such as aluminum foil to prevent electrostatic charge...

Страница 5: ...the solder joints of the two original leads If they are not shiny reheat them and if necessary apply additional solder Fuse and Conventional Resistor Removal Replacement 1 Clip each fuse or resistor lead at top of the circuit board hollow stake 2 Securely crimp the leads of replacement component around notch at stake top 3 Solder the connections CAUTION Maintain original spacing between the replac...

Страница 6: ...0 17025 H x 0 51075 V LG3000 Back Light 32 16CCFL Straight type LG3000 Display Colors 16 7M 16 777 216 Coating 3H AG 1 Application range This specification is applied to the LCD TV used LD84A chassis 2 Requirement for Test Each part is tested as below without special appointment 1 Temperature 25 5ºC 77 9ºF CST 40 5ºC 2 Relative Humidity 65 10 3 Power Voltage Standard input voltage 100 240V 50 60Hz...

Страница 7: ...PAL I I SECAM L L DVB T ID TV Receiving system Analog Upper Heterodyne Digital COFDM Scart Jack 2EA PAL SECAM Scart 1 Jack is Full scart and support RF OUT analog Scart 2 Jack is Half scart and support MNT DTV OUT Video Input RCA 1EA PAL SECAM NTSC 4 System PAL SECAM NTSC PAL60 S Video Input 1EA PAL SECAM NTSC 4 System PAL SECAM NTSC PAL60 Component Input 1EA Y Cb Cr Y Pb Pr RGB Input 1EA RGB PC A...

Страница 8: ... 744 59 948 101 00 WSXGA 22LG3000 ZA only 11 1680 1050 65 16 59 94 147 00 WSXGA 22LG3000 ZA only 12 1280 1024 63 595 60 0 108 875 SXGA FHD Model only 13 1920 1080 66 647 59 988 138 625 WUXGA FHD Model only 6 Component Video Input Y PB PR No Specification Remark Resolution H freq kHz V freq Hz 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 4 720 4...

Страница 9: ...9 948 101 00 WSXGA 22LG3000 ZA only 11 1680 1050 65 16 59 94 147 00 WSXGA 22LG3000 ZA only 12 1280 1024 63 595 60 0 108 875 SXGA FHD Model only HDCP 13 1920 1080 66 647 59 988 138 625 WUXGA FHD Model only HDCP 9 HDMI PC 8 HDMI DTV No Resolution H freq kHz V freq Hz Pixel clock MHz Proposed 1 720 480 15 734 15 6 59 94 60 27 00 SDTV 480I 2 720 480 31 469 31 5 59 94 60 27 00 27 03 SDTV 480P 3 720 576...

Страница 10: ...P Utility and then click Config tab 2 Set as below and then click Auto Detect and check OK message If display Error Check connect computer jig and set 3 Click Connect tab If display Can t Check connect computer jig and set 4 Click Read tab and then load download file XXXX bin by clicking Read 5 Click Auto tab and set as below 6 Click Run 7 After downloading check OK message USB DOWNLOAD 1 Put the ...

Страница 11: ...y at ADC CALIBRATION RGB PC 2 COMPONENT input ADC 1 Component Gain Offset Adjustment Convert to Component in Input source Signal equipment displays Impress Resolution 480i MODEL 209 in Pattern Generator 480i Mode Pattern 65 in Pattern Generator MSPG 925 series Impress Resolution 1080i Model 223 in Pattern Generator 1080i Mode Pattern 65 in Pattern Generator MSPG 925 series Adjust by commanding AUT...

Страница 12: ...odel Don t push The IN STOP KEY after completing the function inspection 4 2 DPM operation confirmation Only Apply for MNT Model Check if Power LED Color and Power Consumption operate as standard Set Input to RGB and connect D sub cable to set Measurement Condition 100 240V 50 60Hz Confirm DPM operation at the state of screen without Signal 4 3 DDC EDID Write RGB 128Byte Connect D sub Signal Cable...

Страница 13: ...0xA0 page AC off on and on HDCP button of MSPG925 and confirm whether picture is displayed or not of using MSPG925 HDCP Key value is different among the sets 4 11 Outgoing condition Configuration When pressing IN STOP key by SVC remocon Red LED are blinked alternatively And then Automatically turn off Must not AC power OFF during blinking 4 12 Internal pressure Confirm whether is normal or not whe...

Страница 14: ...rocess Plug in the power cord Yes No Connect the Cable No Is the fuse of PSU normal Replace the Fuse Yes No Is it connected that PSU and P1100 in Main B D Connect the Cable P1100 If there is normal status Replace main board Yes No After all cables connect is removed to PSU the AC voltage marking is authorized on manual When ST BY 5V 15V are not operated replace PSU Is inserted a plugged in power c...

Страница 15: ...IC IC100 No Yes No Change Main bord Yes No S W download and set White Balance value Before change Main Board Check S W version and White Balance value Does minute discharge at Module Is the link cable normal Is the IC801 s output normal Is the inverter on 2 No Raster 1 Symptom 1 No OSD abnd image occur at screen 2 It maintains the conditioon where the front LED is blue 2 Check process Is output th...

Страница 16: ...rmal CheckTU500 _Pin15 Is the LVDS cable connected well Is the input voltage normal Check TU500_Pin4 Is the I2C communication Normal Check Pin10 Pin11 3 Unusual display from TV CATV mode BLOCK A Yes No No Yes Replace Main board Check the Power Same as Block A Yes No Check the Tuner Is video output of the tuner normal Check TU500_ pin24 pin34 Is the input voltage normal Check Pin21 22 Is the I2C co...

Страница 17: ... JK600 _Pin7 11 15 No If there is normal status Replace main board Is waveform of Switching IC normal Check IC700_Pin11 12 13 5 Unusual display from AV1 AV2 SCART mode CVBS Input RGB Input 6 Unusual display from AV3 SIDE AV mode CVBS Input Yes No If there is normal status Replace main board Same as Block A Is video input of RCA Jack normal Check R704 Check the input source 7 Unusual display from C...

Страница 18: ...re is normal status Replace main board Is waveform of Switching IC normal Check IC700_Pin11 12 13 8 Unusual display from RGB mode Check the input source Same as Block A No Check the IC900 IC901 IC903 No Check the IC902 and DHCP value No Check the IC902 No Yes Is video input of the HDMI jack normal Check JK900 901 902 Yes Check DDC communication lines IC900 901 903 _Pin5 6 Yes Check HDCP communicat...

Страница 19: ...C1000 Replace main board No Yes No No All input is no sound Only HDMI is no Sound Only RF or DTV is no sound Is the speaker on on menu Is the Speaker cable normal 10 No Sound 1 Symptom 1 LED is blue 2 Screen display but sound is not output 2 Check process Yes IC100 operate normally Yes IC1000 operate normally Yes Yes Change Main bord S W download and set White Balance value Before change Main Boar...

Страница 20: ... DSUB_H V_SYNC MAX3232 IC702 DDC UART Tx Rx HDMI Switch IC902 EEPROM HDMI_I2C HDMI_I2C_0 HDMI_CEC Rx HPD TMDS x3 HPD x3 HDMI_CEC x3 USB_DM DP 5V_HDMI PCM_ADD PCM_DATA TS_Parallel TU_TS_DATA KIC7SZ32FU IC802 PCM_CD_ON CI_CD_1 2 IIS MUTE LED_G R IR Flash Memory 4MB IC101 SC1_CVBS_IN SC2_CVBS_IN SC1_TV_VOUT DTV MNT_V_OUT SC1_L R_IN TV_L R_OUT DTV MNT_L R_OUT LCD Panel 52 47 42 37 FHD 32 HD RESET I2C ...

Страница 22: ...y Copyright 2008 LG Electronics Inc All right reserved Only for training and service purposes 22 300 200 510 121 500 120 122 400 401 800 801 802 804 803 530 521 821 805 550 910 904 902 901 905 903 900 830 540 EXPLODED VIEW ...

Страница 26: ...Feb 2008 Printed in Korea P NO MFL41037107 ...

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