LG 47LG70YD, Service Manual

Page 1: ...LCD TV SERVICE MANUAL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL CHASSIS LB81D MODEL 47LG70YD 47LG70YD AA website http biz LGservice com Internal Use Only ...

Page 2: ...ht LG Electronics Inc All right reserved Only for training and service purposes C 2008 2 CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 11 TROUBLE SHOOTING 17 BLOCK DIAGRAM 21 EXPLODED VIEW 33 SVC SHEET ...

Page 3: ...afe 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 ter...

Page 4: ...e 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 charg...

Page 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 repla...

Page 6: ...D AA LK520D3LZ97 52LG70YD AA Operating Environment 1 Temp 0 40 deg LGE Spec 2 Humidity 80 Storage Environment 1 Temp 20 60 deg 2 Humidity 85 1 Application range This specification is applied to the LCD TV used LB81D 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 ...

Page 7: ...03 0 335 0 03 GREEN X 0 289 Y 0 609 BLUE X 0 145 Y 0 063 WHITE X 0 279 Y 0 292 RED X 0 610 0 640 0 670 52LG70YD AA Y 0 300 0 330 0 360 GREEN X 0 250 0 280 0 310 Y 0 570 0 600 0 630 BLUE X 0 120 0 150 0 180 Y 0 030 0 060 0 090 WHITE X 0 242 0 272 0 302 Y 0 247 0 277 0 307 5 Color coordinate uniformity N A 6 Contrast ratio 900 1300 47LG70YD AA 1200 1800 52LG70YD AA 7 Color Temperature Cool 11 000 Te...

Page 8: ... 768 47 72 59 8 84 75 WXGA 7 1366 768 47 56 59 6 84 75 WXGA 8 1280 1024 63 595 60 0 108 875 SXGA 9 1920 1080 66 647 59 988 138 625 WUXGA 6 Component Video Input Y PB PR No Specification Remark Resolution H freq kHz V freq Hz 1 720x480 15 73 59 94 SDTV DVD 480i 2 720x480 15 75 60 SDTV DVD 480i 3 720x480 31 47 59 94 SDTV 480p 4 720X480 31 5 60 SDTV 480p 5 720x576 15 625 50 SDTV DVD 576i 6 720x576 31...

Page 9: ... 9 1920 1080 66 647 59 988 138 625 WUXGA DTV 1 720 480 31 47 59 94 27 00 SDTV 480P 4 3 2 720 480 31 50 60 27 027 SDTV 480P 4 3 3 720 480 31 47 59 94 27 000 SDTV 480P 16 9 4 720 480 31 50 60 00 27 027 SDTV 480P 16 9 5 720 576 31 25 50 00 27 000 SDTV 576P 6 1280 720 37 50 50 00 74 176 HDTV 720P HDCP 7 1280 720 44 96 59 94 74 176 HDTV 720P HDCP 8 1280 720 45 00 60 00 74 250 HDTV 720P 9 1920 1080 33 7...

Page 10: ...Remark 1 Product Widt W Length D Height H mm Dimension Before Packing 1034 293 4 735 mm With Stant After Packing 1330 257 772 mm 2 Product Only SET 23 5 Kg With BOX 26 2 Kg 8 2 52LG70YD AA No Item Content Unit Remark 1 Product Widt W Length D Height H mm Dimension Before Packing 1156 2 342 9 813 1 mm With Stant After Packing 1266 460 887 mm 2 Product Only SET 29 5 Kg With BOX 35 4 Kg ...

Page 11: ...spection 3 Main PCB check process APC After Manual Insult executing APC Download 1 Execute ISP program Mstar ISP 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 ...

Page 12: ...r Service Mode by pushing ADJ key execute ADC Adjust by pushing G key 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 MPSG 1025D 7 color bar Impress Resolution 1080i Model 223 in Pattern Ge...

Page 13: ...with Mstar scaler Manufacture have no use for dwnload of EDID for HDMI1 2 3 4 because HDMI EDID data is in the Application Program 4 3 1 Analog data 128Byte 2Bi EDID block 0 Bytes 0 127 00H 7FH Block Type EDID 1 3 4 3 2 Digital data HDMI 1 256Byte EDID block 0 Bytes 0 127 00H 7FH Block Type EDID 1 3 EDID block 1 Bytes 128 255 80H FFH Block Type CEA EDID Timing Extension Version 3 13 LGE Internal U...

Page 14: ...Must not AC power OFF during blinking 4 12 Internal pressure Confirm whether is normal or not when between power board s ac block and GND is impacked on 1 5kV dc or 2 2kV dc for one secon 14 LGE Internal Use Only Copyright LG Electronics Inc All right reserved Only for training and service purposes C 2008 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 00 FF FF FF FF FF FF 00 1E 6D FC 9C 01 01 01 01 10 0A 12 01...

Page 15: ...e E8 00 data EEPROM Write by some values COLOR SAVE EB 00 00 Color Save R G B cutoff Drive Contrast Bright H POSITION 20 00 00 64 They have different V POSITION 30 00 00 64 range each mode CLOCK 90 00 00 64 FOS Adjustment PHASE 92 00 00 64 R DRIVE 16 00 cool 00 80 Drive adjustment 01 medium 02 warm G DRIVE 18 00 cool 00 80 01 medium 02 warm B DRIVE 1A 00 cool 00 80 01 medium 02 warm R CUTOFF 80 00...

Page 16: ...PROM 5 7 NVRAM Read Send CMD 70h to read Video RAM value from MICOM And save its value to 128 Bytes Buffer Common Buffer for the use of EDID Delay 500ms Time to Wait and Read Video RAM from MICOM Be transmitted the contents of MICOM s 128 bytes Buffer to PC 128th Data is the CheckSum of 127 bytes data That s OK if the value of adding 128 bytes Data is Zero 16 LGE Internal Use Only Copyright LG Ele...

Page 17: ...ot NO After checking the Power of Main IC IC100 you should decide to replace Main IC or not This board has big problem because Main IC IC100 have some troubles After checking thoroughly all path once again You should decide to replace Main Board or not Check the output data of TU800 Pin 24 34 Can you see the normal signal NO Could you measure voltage of TU800 IIC lines Are they all normal NO You s...

Page 18: ...nce again You should decide to replace Main Board or not YES 4 Component doesn t display Check J701 Can you see the normal waveform Check the input of Component Audio switch IC1001 Can you see the normal waveform Check the output of Component Audio switch IC1001 Can you see the normal waveform YES YES YES NO J701 may have problem Replace this Jack NO After checking the Power of component Audio swi...

Page 19: ...GB Audio switch or not NO After checking the Power of RGB Audio switch you should decide to replace RGB Audio switch or not Check the output of Main IC IC100 Especially you should check The H V sync and clock Can you see the normal waveform YES NO After checking the Power of Main IC IC100 you should decide to replace Main IC or not This board has big problem because Main IC IC100 have some trouble...

Page 20: ... and power of HDMI Switch you should decide to replace HDMI Switch or not NO NO After checking the Power of this chip you should decide to replace this or not After checking the Power of HDMI Switch you should decide to replace MST3361 or not YES Check HDCP communication lines IC902 NO After checking the Power of this chip you should decide to replace this or not Check the output of Main IC IC100 ...

Page 21: ... MUTE 6 AUOUTR0 80 AUOUTL0 79 GPIO12 45 LVDS 177 190 194 199 RXE RXO BIN 1 SOGIN 2 GIN 3 RIN 4 VS_RGB 7 HS_RGB 8 SCL RX 33 SDA TX 34 DM_DET PB_IN 11 SOY 13 Y_IN 14 PR_IN 16 AUL_IN1 70 AUR_IN1 71 CVBS1 30 AUL_IN0 68 AUR_IN 69 SV_C0 25 SV_Y0 26 GPIO15 48 6612F00099A 0 27617 EAG31022001 0 185 Tx Rx IC603 MAX3232CDR Tx_Out Rx_In R232C_TXD R232C_RXD EEPROM AT24C028N DDC_SDA UART_Tx DDC_SCL UART_Rx IR_R...

Page 22: ... 255 2 3 3V 1 8V HP_OUT_L 42 HP_OUT_R 1 OUT_P_R 8 OUT_N_R 14 OUT_P_L 35 OUT_N_L 29 IN_L 38 IN_R 5 HP_DET 37 MUTE 6 12V AUOUTR0 80 AUOUTL0 79 GPIO12 45 LVDS 177 190 194 199 RXE RXO BIN 1 SOGIN 2 GIN 3 RIN 4 VS_RGB 7 HS_RGB 8 SCL RX 33 SDA TX 34 DM_DET AUR_IN3 76 AUL_IN3 75 PB_IN 11 SOY 13 Y_IN 14 PR_IN 16 AUL_IN1 70 AUR_IN1 71 CVBS1 30 AUL_IN0 68 AUR_IN 69 SV_C0 25 SV_Y0 26 GPIO15 48 6630G70016A 0 ...

Page 23: ... SAR2 203 SAR3 204 ROMSCK 35 ROMSD 36 SPI_CK 171 SPI_DI 172 SPI_DO 173 SPI_CZ 174 KEY_CTL 1 2 3 EAN32213401 LVDS 8Bit EEPROM 32K 24C32 EEPROM 32K 24C32 0IMMRAL025A 5V 0 145 0 76 Flash 16M SST25VF016B Flash 16M SST25VF016B 0 67 3 3V Changed 32K 512K HY5DU561622 DDR HY5DU561622 DDR 2 5_DDR HY5DU561622 DDR HY5DU561622 DDR MICRONAS FRC9459M EL A3 MICRONAS MICRONAS FRC9459M EL A3 HYB18TC256160BF 3S DDR...

Page 24: ...g and service purposes C 2008 MSD2379A MSTAR DDC_I2C E2PROM_I2C E2PR OM EDID ISP I2C MSCL MSDA IF_P IF_N SIF TUNER_CVBS IF_AGC Buffer Buffer LPF TS 0 7 TS_CLK TS_SYNC TS_VALID I2C MSCL MSDA MAIN I2C CVBS_0 SIF TS_DATA Add sy nc p attern of each input output Add deta il bloc k di agram of VSB ...

Page 25: ... and service purposes C 2008 MSD2379A MSTAR DDC_I2C E2PROM_I2C E2PR OM EDID ISP TUNER S CL SDA IF_P IF_N SIF TUNER_CVBS IF_AGC Buffer Buffer LPF TS 0 7 TS_CLK TS_SYNC TS_VALID I2C MSCL MSDA MAIN I2C CVBS_0 SIF TS_DATA Add sy nc p attern of each input output Add deta il bloc k di agram of VSB ...

Page 26: ...service purposes C 2008 Signal Video AV S Video AT_TU_V Y Cb Cr_IN Y C IN CVBS1 CVBS0 CVBS1 MStar MSD2379A From Tuner SVIDEO Y C Component Y Cb Cr RGB RGB_IN Component RGB LGD T3303 LGD T3303 TS Data DTV_IN Add sy nc p attern of each input output Add deta il bl oc k di agr am of each Vid eo input ...

Page 27: ... All right reserved Only for training and service purposes C 2008 NT P3 000 MSD2379A MSTAR SPEAKER Output SIF TS_DATA AU_OUT0_ L R AV1_L R COMPONENT_L R DSUB RGB_L R Add sy nc p attern of each input output Add deta il bl oc k di agr am of each Audio input ...

Page 28: ...nd service purposes C 2008 M STAR MSD2379 A IR Local Key 57 IR IN SAR is low speed 6 Bits ADC input and also for GPIO function use The I O tolerance is 3 3V maximum for use The application of A D key the conversion voltage for full scale of MSD1226L is 1 8V 201 SAR0 202 SAR1 KEY_CTL_0 KEY_CTL_1 ...

Page 29: ...D IC800 MP1583DN Z 12V Sound Mute 12V Option Pannel 23 Output Current 3A Input 4 75V to 23V Output 1 22V to 21V 0 6A 0 4A TUNER IC800 MP1583DN Z 5V 12V 0 46 265mA IC807 KIA78R05F Output Current 1A Input 7V Max 35V Output 5V 0 17 IC803 AZ1117H 3 3V IC804 AZ1117H 3 3V ST_3 3V ST_3 3V Flash Memory MX25L1605AM2C SDRAM HY57V641620ETP IC802 KD1084ADT R ST_1 8V IR IC806 AZ1117H 1 8 IC805 AZ1117H 3 3 1 8V...

Page 30: ...MP1583DN Z 12V Sound Mute 12V Option Pannel 23 Output Current 3A Input 4 75V to 23V Output 1 22V to 21V 0 6A 0 4A TUNER IC800 MP1583DN Z 5V 12V 0 46 265mA IC807 KIA78R05F Output Current 1A Input 7V Max 35V Output 5V 0 17 IC803 AZ1117H 3 3V IC804 AZ1117H 3 3V ST_3 3V ST_3 3V Flash Memory MX25L1605AM2C SDRAM HY57V641620ETP IC802 KD1084ADT R ST_1 8V IR IC807 AZ1117H 1 2 IC805 AZ1117H 3 3 1 2V 3 3V Pa...

Page 31: ... 33 DDC_SD 34 SCL RX SDA TX VGA_RX VGA_TX EEPROM 24C32 DDC_ROMSCK 35 DDC_ROMSD 36 ROMSCK ROMSD FLASH SST25VF016B SPI_CK SPI_DI SPI_DO SPI_CZ SPI_CK 171 SPI_DI 172 SPI_DO 173 SPI_CZ 174 VGA D SUB VGA D SUB EEPROM 24C21A DDC_SCL DDC_DSA UATX1 55 UARX1 56 SDRAM 4M 16Bit SDRAM 4M 16Bit SDRAM 4M 16Bit M2_CKE M2_MCLK M2_A 0 11 M2_DQ 0 15 M2_DQM0 M2_DQM1 CKE MCLK AR 0 11 MDATA 0 15 DQM0 DQM1 CKE MCLK AR ...

Page 32: ...ed Only for training and service purposes C 2008 Mstar MSD1226L ATSC NTSC Tuner LGDT 3303 MSCL MSDA I2C_5V 4 7K 5VST NVRAM I2C Address 0xC2 0x1C Mstar MSD1226L MX25L1605 Serial Flash SCK SDI SDO CSZ SPI_CK SPI_DI SPI_DO SPI_CSZ SCLK SI SO CS 4 7K 3 3V DDC_ROM SCL SDA 0xA0 ...

Page 33: ...W 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...

Page 34: ...SCHEMATICDIAGRAM Copyright LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only C 2008 ...

Page 35: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only C 2008 ...

Page 36: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only C 2008 ...

Page 37: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only C 2008 ...

Page 38: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only C 2008 ...

Page 39: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only C 2008 ...

Page 40: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only C 2008 ...

Page 41: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only C 2008 ...

Page 42: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only C 2008 ...

Page 43: ...Copyright LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only C 2008 ...

Page 44: ...Jun 2008 Printed in Korea P NO MFL47147109 ...