LG 42LA790V Service Manual Download Page 114

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Only for training and service purposes

LGE Internal Use Only

Abnormal Power Section

Solder defect, Short/Crack

Abnormal Power Section

Solder defect, Short/Crack

Fuse Open, Abnormal power section

Noise

GRADATION

Abnormal Display

Appendix : Exchange EPI Cable or Main B/D (2)

Summary of Contents for 42LA790V

Page 1: ... 47LA790V W 9 47LA790V W 9 ZA CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL LED TV SERVICE MANUAL North Latin America http aic lgservice com Europe Africa http eic lgservice com Asia Oceania http biz lgservice com Internal Use Only ...

Page 2: ...ight LG Electronics Inc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 13 EXPLODED VIEW 22 SCHEMATIC CIRCUIT DIAGRAM ...

Page 3: ...inals etc to be sure the set is safe 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 m...

Page 4: ...ctrostatic charge on your body by touching a known earth ground Alter natively obtain and wear a commercially available discharg ing 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 e...

Page 5: ...he 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 replace...

Page 6: ...gium Russia Luxemburg Greece Czech Croatia Turkey Moroco Ireland Latvia Estonia Lithuania Poland Portugal Romania Albania Bosnia Serbia Slovakia Be ralus DTV MPEG2 4 DVB T2 8 countries UK Ireland Sweden Denmark Finland Norway Ukraine Kaza khstan Russia DTV MPEG2 4 DVB C 37 countries Germany Netherland Switzerland Hungary Austria Slovenia Bul garia France Spain Italy Belgium Russia Luxemburg Greece...

Page 7: ...al Bitrate_Mbit s 1 4 1 8 1 16 1 32 Modulation Code Rate QPSK 1 2 2 3 3 4 5 6 7 8 16 QAM 1 2 2 3 3 4 5 6 7 8 64 QAM 1 2 2 3 3 4 5 6 7 8 DVB T2 Guard Interval Bitrate_Mbit s 1 4 1 8 1 16 1 32 1 128 19 128 19 256 Modulation Code Rate QPSK 1 2 2 5 2 3 3 4 5 6 16 QAM 1 2 2 5 2 3 3 4 5 6 64 QAM 1 2 2 5 2 3 3 4 5 6 256 QAM 1 2 2 5 2 3 3 4 5 6 DVB C Symbolrate 4 0Msymbols s to 7 2 Msymbols s Modulation 1...

Page 8: ... 350 31 468 70 09 25 17 EGA Х 2 720 400 31 469 70 08 28 32 DOS O 3 640 480 31 469 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 1152 864 54 348 60 053 80 VESA 7 1280 1024 63 981 60 020 108 VESA SXGA O 8 1360 768 47 712 60 015 85 5 VESA WXGA O 9 1920 1080 67 5 60 00 148 5 WUXGA CEA861D O HDMI DTV 1 640 480 31 469 31 5 59 94 60 25 125 1 SD...

Page 9: ...aving 2 720 576 31 25 50 27 SDTV 576P 3 1280 720 45 00 60 00 74 25 HDTV 720P 4 1280 720 37 500 50 74 25 HDTV 720P 5 1920 1080 33 75 60 00 74 25 HDTV 1080I 2D to 3D Side by Side Half Top Bottom 6 1920 1080 28 125 50 00 74 25 HDTV 1080I 7 1920 1080 27 00 24 00 74 25 HDTV 1080P 2D to 3D Side by Side Half Top Bottom Checker Board Row Interleaving Column Interleaving 8 1920 1080 28 12 25 74 25 HDTV 108...

Page 10: ...ive Primary HDTV 720P HDTV 720P 15 44 96 45 59 94 60 148 35 148 5 4 Side by side Full HDTV 720P 16 1920 1080 33 72 33 75 59 94 60 74 18 74 25 5 Top and Bottom Side by side half Secondary HDTV 1080I Primary HDTV 1080I 17 67 432 67 50 59 94 60 148 35 148 5 5 Frame packing Line alternative Primary HDTV 1080I HDTV 1080I 18 33 72 33 75 59 94 60 148 35 148 5 5 Side by side Full HDTV 1080I 19 28 125 50 0...

Page 11: ...ottom HDTV 720P 2 1280 720 45 00 60 00 74 25 2D to 3D Side by Side Top Bottom HDTV 720P 3 1280 720 44 96 59 94 74 176 2D to 3D Side by Side Top Bottom HDTV 720P 4 1920 1080 33 75 60 00 74 25 2D to 3D Side by Side Top Bottom HDTV 1080I 5 1920 1080 33 72 59 94 74 176 2D to 3D Side by Side Top Bottom HDTV 1080I 6 1920 1080 28 12 50 74 25 2D to 3D Side by Side Top Bottom HDTV 1080I 7 1920 1080 67 500 ...

Page 12: ...hecker Board Row Interleaving Column Interleaving 7 USB DLNA Movie 3D 3D supported mode manually 9 USB DLNA 3D 3D supported mode automatically No Resolution H freq kHz V freq Hz Pixel clock MHz 3D input proposed mode 1 Under 320x240 2D to 3D 2 Over 320x240 2D to 3D Side by Side Half Top Bottom 8 USB DLNA Photo 3D 3D supported mode manually No Resolution H freq kHz V freq Hz Pixel clock MHz 3D inpu...

Page 13: ...tment is needed to find the optimum black level and gain in Analog to Digital device and to compensate RGB deviation 3 1 2 Equipment Condition 1 USB to RS 232C Jig 2 MSPG 925 Series Pattern Generator MSPG 925FA pattern 65 Resolution 480i Comp1 1080P Comp1 1920 1080P SCART RGB Pattern Horizontal 100 Color Bar Pattern Pattern level 0 7 0 1 Vp p Image 3 1 3 Adjustment 1 Adjustment method Using RS 232...

Page 14: ...LAN Port Test PROGRAM 2 Input IP set up for an inspection to Test Program IP Number 12 12 2 2 3 4 2 LAN PORT inspection PING TEST 1 Play the LAN Port Test Program 2 Connect each other LAN Port Jack 3 Play Test F9 button and confirm OK Message 4 Remove LAN cable 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 115200 bps...

Page 15: ...ng method Check the Section 3 2 Check whether the key was downloaded or not at In Start menu Refer to below Check the Download to CI Key value in LGset 3 6 1 Check the method of CI Key value 1 Check the method on Instart menu 2 Check the method of RS232C Command 1 Into the main ass y mode RS232 aa 00 00 2 Check the key download for transmitted command RS232 ci 00 10 3 Result value Normally status ...

Page 16: ...3 00 00 1E 01 1D 80 18 0x05 71 1C 16 20 58 2C 25 00 40 84 63 00 00 9E 01 1D 0x06 00 72 51 D0 1E 20 6E 28 55 00 40 84 63 00 00 1E 0x07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ⓔ2 0 1 2 3 4 5 6 7 8 9 A B C D E F 00 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01 10 01 17 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26 20 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 81 80 30 01 01 01 01 01 01 02 3A 80 18 ...

Page 17: ...ent wb 00 10 Gain adjustment internal white pattern wb 00 1f Gain adjustment completed wb 00 20 Offset adjustment internal white pattern wb 00 2f Offset adjustment completed wb 00 ff End White Balance adjustment internal pattern disappears 0 0 1 2 3 4 5 6 7 8 9 A B C D E F 00 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01 10 01 17 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26 20 0F 50 54 A1 08 00 31 ...

Page 18: ...ease the B gain 3 x target y target i First decrease B so make y a little more than the target ii Adjust x value by decreasing the R 4 x target y target i First decrease B so make x a little more than the target ii Adjust x value by decreasing the G How to adjust 1 If G gain is adjusted over 172 and R gain and B gain less than 192 Adjust is O K 2 If G gain is less than 172 increase G gain by up to...

Page 19: ...ttern 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 Don t wear a 3D Glasses check the picture like below Mode Coordinate Temp uv x y Cool 0 271 0 002 0 270 0 002 13000K 0 0000 Medium 0 285 0 002 0 293 0 002 9300K 0 0000 Warm 0 310 0 002 0 325 0 002 6500K 0 0000 GP4 Aging ...

Page 20: ...est result 1 After press LNB On key 18 V LED and 22 KHz tone LED should be ON 2 After press LNB OFF key 18 V LED and 22 KHz tone LED should be OFF 4 8 Inspection of light scattering Test Method 1 Push Power only key 2 Push HDMI hot key 3 Inspect whether light scattering is occurred in internal black pattern or not 4 Push Power only key 4 9 Option selection per country 4 9 1 Overview Option selecti...

Page 21: ... LIVE NEUTRAL LEAKAGE CURRENT At 0 5 mArms 5 Audio Measurement condition 1 RF input Mono 1 KHz sine wave signal 100 Modulation 2 CVBS Component 1 KHz sine wave signal 0 5 Vrms 3 RGB PC 1 KHz sine wave signal 0 7 Vrms 6 USB S W Download Service only 1 Put the USB Stick to the USB socket 2 Automatically detecting update file in USB Stick If your downloaded program version in USB Stick is Low it didn...

Page 22: ... EXPLODED VIEW 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 ...

Page 23: ...8 W33 EXT_INTR0 GPIO67 W34 UART0_RXD AU12 UART0_TXD AT12 UART1_RXD AU13 UART1_TXD AT13 UART1_RTS AP12 UART1_CTS AR12 SPI_CS0 GPIO36 AE35 SPI_DO0 GPIO38 AE36 SPI_DI0 GPIO39 AF36 SPI_SCLK0 GPIO37 AF35 SPI_CS1 AG34 SPI_DO1 AF33 SPI_DI1 AG33 SPI_SCLK1 AG32 SCL0 GPIO66 AR15 SDA0 GPIO65 AP15 SCL1 GPIO64 AR16 SDA1 GPIO79 AP16 SCL2 GPIO78 AP17 SDA2 GPIO77 AR17 SCL3 AP6 SDA3 AR6 SCL4 AH32 SDA4 AJ33 SCL5 AH...

Page 24: ...C100 LG1154D_H13D GND_1 A27 GND_2 B5 GND_3 C5 GND_4 C26 GND_5 C27 GND_6 D5 GND_7 D26 GND_8 E5 GND_9 E6 GND_10 E7 GND_11 E8 GND_12 E22 GND_13 E23 GND_14 E26 GND_15 F7 GND_16 F8 GND_17 F22 GND_18 F23 GND_19 F24 GND_20 F25 GND_21 F26 GND_22 F27 GND_23 F31 GND_24 G7 GND_25 G8 GND_26 G9 GND_27 G10 GND_28 G11 GND_29 G12 GND_30 G13 GND_31 G14 GND_32 G15 GND_33 G16 GND_34 G17 GND_35 G18 GND_36 G19 GND_37 ...

Page 25: ...14 CVBS_IN1 V15 CVBS_VCM V13 BUF_OUT1 U15 BUF_OUT2 U14 REFT U7 REFB V6 ADC1_COM V7 ADC2_COM U10 ADC3_COM V12 SC1_SID T5 SC1_FB T6 PB1_IN U8 Y1_IN V8 SOY1_IN V9 PR1_IN U9 PB2_IN V10 Y2_IN U11 SOY2_IN V11 PR2_IN U12 AAD_ADC_SIF H18 AAD_ADC_SIFM H17 AUDA_VBG_EXT P2 AUDA_OUTL N1 AUDA_OUTR N2 AUD_SCART_OUTL N3 AUD_SCART_OUTR P1 AUAD_L_CH4_IN P3 AUAD_R_CH4_IN R1 AUAD_L_CH3_IN R2 AUAD_R_CH3_IN T1 AUAD_L_...

Page 26: ...DQU3 C2 DQU4 A7 DQU5 A2 DQU6 B8 DQU7 A3 VREFCA M8 VREFDQ H1 ZQ L8 VDD_1 B2 VDD_2 D9 VDD_3 G7 VDD_4 K2 VDD_5 K8 VDD_6 N1 VDD_7 N9 VDD_8 R1 VDD_9 R9 VDDQ_1 A1 VDDQ_2 A8 VDDQ_3 C1 VDDQ_4 C9 VDDQ_5 D2 VDDQ_6 E9 VDDQ_7 F1 VDDQ_8 H2 VDDQ_9 H9 NC_1 J1 NC_2 J9 NC_3 L1 NC_4 L9 A14 T7 VSS_1 A9 VSS_2 B3 VSS_3 E1 VSS_4 G8 VSS_5 J2 VSS_6 J8 VSS_7 M1 VSS_8 M9 VSS_9 P1 VSS_10 P9 VSS_11 T1 VSS_12 T9 VSSQ_1 B1 VSS...

Page 27: ...5 0 OPT R713 0 OPT PCM_IOWR CI_ADDR 4 R704 10K OPT CI_TS_DATA 0 PCM_IRQA CI_CD1 CI_IN_TS_VAL CI_TS_VAL CI_ADDR 1 CI_ADDR 11 PCM_INPACK CI_VS1 CI_TS_DATA 3 5V_CI_ON CI_TS_DATA 5 R710 0 OPT CI_ADDR 9 R709 10K CI R718 0 OPT CI_TS_DATA 7 5V_CI_ON CI_CD2 R711 10K OPT C706 0 1uF CI CI_DATA 0 7 R707 10K OPT CI_TS_DATA 6 R708 10K OPT CI_TS_DATA 4 CI_TS_SYNC C702 0 1uF CI R712 10K OPT CI_TS_DATA 2 CI_VS1 5...

Page 28: ... 0 1uF 16V R2338 10K OPT C2362 22uF 10V C2302 180pF 50V IC2305 TPS54319TRE DCDC_TI 1 VIN_1 3 GND_1 7 COMP 9 SS TR 10 PH_1 11 PH_2 12 PH_3 13 BOOT 14 PWRGD 15 EN 16 VIN_3 5 AGND 8 RT CLK 6 VSENSE 4 GND_2 2 VIN_2 17 EP GND 3 5V_ST 3 5V_ST R2314 10K 24V PANEL_CTL R2313 1 3K 12V L2320 3 3uH NR5040T3R3N D2300 40V B540C PANEL_VCC PWM_DIM2 1 0V_VDD R2327 1 5 6K 1 PD_20V RL_ON C2306 0 1uF 50V R2326 1 2K 1...

Page 29: ... 10 P71 KR1 SI21 SDA21 11 P70 KR0 SCK21 SCL21 12 P30 INTP3 RTC1HZ SCK11 SCL11 13 P50 INTP1 SI11 SDA11 14 P51 INTP2 SO11 15 P17 TI02 TO02 16 P16 TI01 TO01 INTP5 17 P15 PCLBUZ1 SCK20 SCL20 18 P14 RXD2 SI20 SDA20 19 P13 TXD2 SO20 20 P12 SO00 TXD0 TOOLTXD 21 P11 SI00 RXD0 TOOLRXD SDA00 22 P10 SCK00 SCL00 23 P146 24 P147 ANI18 25 P27 ANI7 26 P26 ANI6 27 P25 ANI5 28 P24 ANI4 29 P23 ANI3 30 P22 ANI2 31 P...

Page 30: ...SET_N 62 CSDA 63 CSCL 64 INT 65 SPDIF_IN 66 RSVDL 67 VDD12_3 68 ARC 69 TX2P 70 TX2N 71 TX1P 72 TX1N 73 TX0P 74 TX0N 75 TXCP 76 TXCN 77 TCVDD12 78 TPVDD12 79 R0XCN 80 R0XCP 81 R0X0N 82 R0X0P 83 R0X1N 84 R0X1P 85 R0X2N 86 R0X2P 87 AVDD12_3 88 VDD33_2 89 EP GND VA3214 ESD_HDMI R3204 10K C3217 0 1uF 16V VA3203 ESD_HDMI R3226 47K HDMI_CLK HDMI_RX1 I2C_SCL5 IC3200 AZ1117BH 1 2TRE1 1 GND ADJ 2 OUT 3 IN C...

Page 31: ... HP_OUT COMP1_Y COMP1_Pb 3 3V_NORMAL VA3403 5 6V R3400 33 3 3V_NORMAL COMP1_DET AV1_CVBS_IN VA3401 5 6V VA3400 5 5V ADUC 5S 02 0R5L OPT SOC_RX SPDIF_OUT HP_ROUT C3400 0 1uF 16V SOC_TX C3401 18pF ESD_MTK R3407 100 1 16W 5 R3408 100 1 16W 5 R3409 100 1 16W 5 HP_OUT R3403 330K R3404 150 1 10W 5 R3405 150 1 10W 5 C3402 47pF 50V JK3400 PEJ038 4G6 3 M3_DETECT 4 M4 5 M5_GND 1 M1 6 M6 JK3403 PEJ038 3B6 EA...

Page 32: ... 5V_ST VA4000 5 6V AMOTECH CO LTD Q4000 MMBT3904 NXP LOGO_LIGHT E B C L4001 BLM18PG121SN1D R4001 10K LOGO_LIGHT WIFI_DP R4006 100 3 5V_WOL WIFI_DM R4007 100 R4009 10K 5 M_REMOTE_CTS M_REMOTE_RTS LOGO_LIGHT_WAFER R4012 100 LOGO_LIGHT_WAFER P4000 SMAW200 H12S2 NON_OLED WOL RTS TX USB_DM CTS GND 3 3V GND RX 3 5V_WOL RESET USB_DP C4008 47pF 50V C4009 47pF 50V P4003 SMAW200 H16S2 OLED_DEV 14 9 4 13 8 3...

Page 33: ...AMERA C4203 0 1uF CAMERA R4214 680 1 CAMERA C4208 0 1uF CAMERA 3 3V_NORMAL USB2_HUB_IC_IN_DP USB_CAMERA_DM R4204 0 CAMERA CAM_SLIDE_DET C4211 33pF 50V OPT R4211 33 CAMERA 3 3V_NORMAL 3 5V_ST RST_HUB USB_CAMERA_DP CAM_CTL R4212 33 CAMERA R4219 10K OPT USB2_HUB_IC_IN_DM C4214 33pF 50V OPT R4205 0 CAMERA USB_DM3 R4218 10K AUD_LRCK R4217 10K 1 16W 5 CAMERA R4216 100K CAMERA USB_DM3 R4210 0 CAMERA C420...

Page 34: ...MP0502BA USB3_RX0M D4400 RCLAMP0502BA C4500 0 1uF 16V USB3_DP USB3_TX0P 5V_USB_2 5V_NORMAL USB_OCD2 USB_CTL2 R4302 10K USB_CTL3 C4302 0 1uF 16V 3 3V_NORMAL 5V_USB_3 USB_OCD3 R4301 10K C4337 10uF 10V C4301 10uF 10V USB_DM2 D4300 RCLAMP0502BA 5V_USB_2 USB_DP3 5V_USB_3 JK4300 3AU04S 305 ZC LG 1 2 3 4 5 USB_DM3 USB_DP2 D4302 RCLAMP0502BA C4322 10uF 10V C4310 10uF 10V JK4302 3AU04S 305 ZC LG 1 2 3 4 5 ...

Page 35: ...R_OUT 2 AUDIO_R_IN 3 AUDIO_L_OUT 4 AUDIO_GND 5 B_GND 6 AUDIO_L_IN 7 B_OUT 8 ID 9 G_GND 10 G_OUT 11 R_GND 12 R_OUT 13 RGB_IO 14 SYNC_GND 15 SYNC_OUT 16 SYNC_IN 17 COM_GND 18 AV_DET 19 SHIELD C4803 4700pF EU SC_FB VA4802 5 6V EU L4801 BLM18PG121SN1D EU SC_B SC_R C4804 0 1uF EU SC_ID SC_R_IN R4801 10K EU VA4806 5 6V EU VA4809 5 6V EU SC_L_IN C4802 4700pF EU SC_DET VA4801 5 6V EU DTV MNT_R_OUT C4800 1...

Page 36: ...LAN_XML 1 P1 CT 2 P2 TD 3 P3 TD 4 P4 RD 5 P5 RD 6 P6 CT 7 P7 8 P8 12 SHIELD 9 P9 11 P11 10 P10 GND D1 YL_C D2 YL_A D3 GN_C D4 GN_A EPHY_RDP LAN_JACK_POWER VA5100 5 5V C5100 0 1uF 16V EPHY_TDN JK5100 1 TLA 6T764 LAN_TDK 1 R1 2 R2 3 R3 4 R4 5 R5 6 R6 7 R7 8 R8 12 SHIELD 9 R9 11 R11 10 R10 GND D1 YL_C D2 YL_A D3 GN_C D4 GN_A C5103 0 01uF 50V EPHY_TDP VA5103 5 5V C5101 0 01uF 50V C5102 0 1uF 16V VA510...

Page 37: ... EPHY_CRS_DV 3 3V_WOL R5202 1M OPT R5206 33 3 5V_ST Q4300 MMBT3904 NXP E B C C4325 4 7uF 10V R5212 1 5K 1 16W 1 R5204 2 49K 1 EPHY_RDP C5212 0 1uF OPT EPHY_RDN EPHY_TDP IC5200 RTL8201F VB CG 1 RSET 3 MDI 0 7 AVDD33_1 9 RXD 0 10 RXD 1 11 RXD 2 INTB 12 RXD 3 CLK_CTL 13 RXC 14 DVDD33 15 TXC 16 TXD 0 17 TXD 1 18 TXD 2 19 TXD 3 20 TXEN 21 PHYRSTB 22 MDC 23 MDIO 24 LED0 PHYAD 0 PMEB 25 LED1 PHYAD 1 26 C...

Page 38: ...50V C5612 0 047uF C5610 0 1uF 16V C5629 330pF 50V R5610 470 3 3V_NORMAL R5606 33 24V_AMP WOOFER_MUTE C5616 0 033uF 50V C5637 2200pF 50V IC5600 TAS5733 1 OUT_A 2 PVDD_AB_1 3 PVDD_AB_2 4 BST_A 5 NC_1 6 SSTIMER 7 NC_2 8 PBTL 9 AVSS 10 PLL_FLTM 11 PLL_FLTP 12 VR_ANA 13 AVDD 14 A_SEL_FAULT 15 MCLK 16 OSC_RES 17 DVSSO 18 VR_DIG 19 PDN 20 LRCLK 21 SCLK 22 SDIN 23 SDA 24 SCL 25 RESET 26 STEST 27 DVDD 28 D...

Page 39: ...SPK_WOOFER_L C5739 2200pF 50V WOOFER_STEREO C5706 0 1uF 16V WOOFER C5736 2200pF 50V WOOFER C5724 0 033uF 50V WOOFER C5703 10uF 10V WOOFER C5738 2200pF 50V WOOFER_STEREO P5700 FW25003_03 DEV_WOOFER_STEREO 1 2 3 R5710 10K OPT C5701 0 1uF 50V WOOFER C57151uF 25V WOOFER C5734 0 1uF 50V WOOFER_STEREO C5714 0 1uF WOOFER IC5700 TAS5733 WOOFER 1 OUT_A 2 PVDD_AB_1 3 PVDD_AB_2 4 BST_A 5 NC_1 6 SSTIMER 7 NC_...

Page 40: ...U DTV MNT_L_OUT DTV MNT_L_OUT R6002 470K OPT Q6000 MMBT3904 NXP EU E B C R6000 2 2K EU 12V C6007 6800pF OPT SCART_AMP_L_FB R6010 470K OPT C6000 1uF 25V EU R6004 33K EU DTV MNT_R_OUT C6002 6800pF OPT Q6001 MMBT3904 NXP EU E B C L6000 EU SCART_Rout SCART_AMP_R_FB IC6000 AZ4580MTR E1 EU 3 IN1 2 IN1 4 VEE 1 OUT1 5 IN2 6 IN2 7 OUT2 8 VCC R6011 2 2K EU Q6002 RT1P141C T112 EU_SCART_MUTE_ISAHAYA E B C R60...

Page 41: ...RMAL R6104 43K 1 HP_OUT R6103 33K HP_OUT_MTK C6102 1uF 10V HP_OUT R6105 4 7K HP_OUT C6103 1uF 10V HP_OUT HP_ROUT_MAIN L6100 120 ohm HP_OUT BLM18PG121SN1D C6104 180pF HP_OUT_MTK R6106 43K 1 HP_OUT C6107 0 1uF 16V HP_OUT C6109 180pF HP_OUT_MTK R6102 33K HP_OUT_MTK HP_ROUT_AMP C6104 1 18pF HP_OUT_H13 C6109 1 18pF HP_OUT_H13 C6108 10pF 50V HP_OUT C6106 10pF 50V HP_OUT IC6100 TPA6138A2 3 OUTR 2 INR 4 G...

Page 42: ...SENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC 5V_CI_ON 5V_NORMAL R6217 100 CI C6210 1uF 25V CI R6218 10K CI PCM_5V_CTL IC6200 AP2151WG 7 CI 3 FLG 2 GND 4 EN 1 OUT 5 IN R6219 10K CI 62 CI SLOT 2011 10 31 CI POWER ENABLE CONTROL Copyright 2013 LG Electronics Inc All rights reserved LGE Internal Use Only ...

Page 43: ... O 12 AUX2 13 AUX1 14 CGND 15 CLK 16 RST 17 VCC 18 PORADJ 19 CMDVCC 20 RSTIN 21 VDD 22 GND 23 OFF 24 XTAL1 25 XTAL2 26 I OUC 27 AUX1UC 28 AUX2UC R6309 22 JAPAN 3 3V_NORMAL C6300 0 1uF 16V JAPAN C6303 0 1uF 16V JAPAN L6300 BLM18PG121SN1D JAPAN R6312 10K JAPAN R6311 22 JAPAN SMARTCARD_DATA SD_EMMC_CLK C6307 0 33uF 16V JAPAN 5V_NORMAL R6303 OPT 3 3V_NORMAL 3 3V_NORMAL R6304 2 7K JAPAN R6306 OPT R6314...

Page 44: ...M W 3 VIN 2 EN 4 VCTRL 1 PG 5 NC 6 VOUT 7 ADJ 8 GND 9 EP FE_DEMOD1_TS_ERROR IF_P FE_DEMOD1_TS_SYNC TU_CVBS C6538 10uF 10V 3 3V_TU 3 3V_TU FE_DEMOD1_TS_VAL L6507 BLM18PG121SN1D TU_Q W_KR BR TW CO JP Q6501 MMBT3906 NXP TU_A_GLOBAL_6 7 E B C I2C_SCL4_TU R6513 10 TU_Q I2C_SCL4 I2C_SDA4 3 3V_TU R6508 1 1K 5 TU_N M W_CN TW BR CO C6503 0 1uF 16V TU_S N Q_T US KR TW R6502 10 TU_N M S2_RESET_TU R6510 33 FE...

Page 45: ... 35 LNB 36 GND_4 37 SHIELD A1 A1 B1 B1 TU6704 TDSW J551F B TU_W_JP 1 5V_OR_ 3 3V_SPLITTER 2 RESET_T1 3 SCL_T 4 SDA_T 5 3 3V_T1 6 NC_1 7 1 8V_T1 8 NC_2 9 NC_3 10 NC_4 11 NC_5 12 3 3V_T2 13 1 8V_T2 28 GND_2 29 GND_3 30 B5 1 23V 31 D_RESET 36 LNB 32 B6 3 3V 33 NC_6 34 D_SCL 35 D_SDA GND_4 37 GND_5 38 GND_6 39 TS1_ERROR 40 TS1_SYNC 41 TS1_VALID 42 TS1_MCLK 43 TS1_DATA 44 TS2_ERROR 45 TS2_SYNC 46 TS2_V...

Page 46: ...NB A_GND D6904 1 40V LNB_SX34 A_GND A_GND R6903 39K 1 16W 1 LNB A_GND D6903 40V LNB_SMAB34 D6904 40V LNB_SMAB34 LNB_TX C6904 0 1uF 50V LNB C6908 0 1uF LNB C6909 10uF 25V LNB C6912 0 1uF LNB C6902 0 22uF 25V LNB I2C_SCL4 C6900 18pF LNB C6901 33pF LNB IC6900 A8303SESTR T LNB 1 VCP 3 NC_1 7 SCL 9 ADD 10 TONECTRL 11 TCAP 12 ISET 13 VREG 14 GND 15 VIN 16 LX 17 GNDLX 18 NC_2 19 NC_3 20 BOOST 5 TDO 8 SDA...

Page 47: ...ON_SYS_POWER_OFF P7201 FI RE51S HF J R1500 LVDS 1 NC 2 NC 3 NC 4 NC 5 NC 6 NC 7 LVDS_SEL 8 NC 9 NC 10 L DIM_ENABLE 11 GND 12 RA0N 13 RA0P 14 RA1N 15 RA1P 16 RA2N 17 RA2P 18 GND 19 RACLKN 20 RACLKP 21 GND 22 RA3N 23 RA3P 24 RA4N 25 RA4P 26 GND 27 BIT_SEL 28 RB0N 29 RB0P 30 RB1N 31 RB1P 32 RB2N 33 RB2P 34 GND 35 RBCLKN 36 RBCLKP 37 GND 38 RB3N 39 RB3P 40 RB4N 41 RB4P 42 GND 43 GND 44 GND 45 GND 46 G...

Page 48: ...MPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC I2C_SDA2 I2C_SCL2 R7401 10K L DIM_OUT L DIM0_VS 3 3V_NORMAL L DIM0_MOSI R7403 3 3K OPT L DIM0_SCLK P7400 12507WR 08L L DIM_OUT 1 2 3 4 5 6 7 8 9 R7400 10K OPT R7411 33 L DIM_OUT_I2C R7412 33 L DIM_OUT_I2C R7407 0 NO_L DIM_OUT_I2C R7408 0 NO_L DIM_OUT_I2C LOCAL DIMMING 2012 09 14 LOCAL DIMMING 1 To LED DRIVER BSD NC4_H074 HD Copyright 2013 LG Electronics...

Page 49: ...06 10uF 10V TXACLKP VCOM_N GMA7 C7723 10uF 25V R7761 10K OPT VST 3 3V_NORMAL C7739 0 1uF 50V VCOM1 C7748 1uF 25V GMA15 TXB1N IC7700 TPS65178RSLR EPI 1 OUT4 2 SWB4 3 RST 4 OUT1 5 OUT2 6 SWB2 7 PGND2 8 SWB1_1 9 SWB1_2 10 NC 11 PVINB1_1 12 PVINB1_2 13 AVIN 14 PVINB3 15 SWB3 16 OUT3 17 PGND3 18 PGND_1 19 PGND_2 20 SW_1 21 SW_2 22 SWI 23 SWO 24 AGND 25 SS 26 COMP 27 SCL 28 SDA 29 VL 30 TCOMP 31 CTRLP 3...

Page 50: ...L THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC C7923 10uF 25V C7928 10uF 25V C7926 10uF 25V C7930 10uF 25V VDD C7924 10uF 25V VDD_EPI EPI_CAP 2012 09 14 locate different direction for each locate different direction for each BSD NC4_H079 HD Copyright 2013 LG Electronics Inc All rights reserved LGE Internal Use Only ...

Page 51: ...VSSQ_1 C4 VSSQ_2 N2 VSSQ_3 N5 VSSQ_4 P4 VSSQ_5 P6 NC_1 A1 NC_2 A2 NC_3 A8 NC_4 A9 NC_5 A10 NC_6 A11 NC_7 A12 NC_8 A13 NC_9 A14 NC_10 B1 NC_11 B7 NC_12 B8 NC_13 B9 NC_14 B10 NC_15 B11 NC_16 B12 NC_17 B13 NC_18 B14 NC_19 C1 NC_20 C3 NC_22 C7 NC_23 C8 NC_24 C9 NC_25 C10 NC_26 C11 NC_27 C12 NC_28 C13 NC_29 C14 NC_30 D1 NC_31 D2 NC_32 D3 NC_33 D4 NC_34 D12 NC_35 D13 NC_36 D14 NC_37 E1 NC_38 E2 NC_39 E3...

Page 52: ......

Page 53: ...1 90 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only 2013 LED LCD TV Engineering guide Applicable Model High end Platform XXLA79 Z ...

Page 54: ...rface Features Point Point topology support 2 Pair option CDR Clock Data Recovery Bandwidth up to 1 85Gbps pair at FHD 120Hz 10 bit application Lock signal cascading and feedback to T Con Embedded Control Data Merits Better reliability on common noise No data skew and better EMI margin Fewer lines than mini LVDS Slim PCB design TCON 2 LOCK VCC 1 Figure1 Topology ...

Page 55: ...it 60Hz 120Hz 240Hz No of Signal 36 36 72 Connector 60pin 2ea 60pin 2ea 80pin 2ea Better reliability on common noise No data skew Better EMI margin Lower cost Cable Connector Slim S PCB design 14mm 10mm helps slimmer TV EPI FHD 10bit 60Hz 120Hz 240Hz 960ch 960ch 720ch No of Signal 12 12 32 Connector 50 pin 2ea 70pin 2ea LCM T con to S Driver IC TCON 2 LOCK VCC 1 TCON 18 VCC 1 18 HF mini LVDS EPI B...

Page 56: ...0 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 36 Clock skew EMI due to clock lines Bandwidth limit Transmission Overhead 4bit delimiter TCON Lock 2 1 TCON EPI Interface mini LVDS vs EPI ...

Page 57: ...n with each other by touching them together or bringing them into close proximity usually no more than a few centimetres Present and anticipated applications include contactless transactions data exchange and simplified setup of more complex communications such as Wi Fi Communication is also possible between an NFC device and an unpowered NFC chip called a tag User Action Area Samrt phone close to...

Page 58: ...he volume control What is the difference between headphones and line out headphone adjusts the volume on the television whereas line out adjust the volume on the external devices such as amp or receiver Line out is a two channel stereo output and you need a cable to connect an external speaker H13 provides headphone and external speaker output through an output phone jack To set the line out you c...

Page 59: ...oses LGE Internal Use Only Main PCB for Broadband Main TCON all in one To PSU 2 6 4 1 Main processor DDR Memory eMMC Memory 2 3 4 Micom for Key IR Logo sensing PMIC Audio AMP xxLA790V Zx Key IR Logo Front Spk To module 5 5 EPI Wafer Chassis LD34D PCB P No EAX65040103 3 6 Level shifter WIFI BT 1 ...

Page 60: ...BS Comp1 Y Pb Pr HDMI Switch HDMI2 HDMI3 H13 LG1154AN USB1 USB3 0 USB2 USB2 0 USB3 USB2 0 Motion R M Remote_Rx Tx Audio AMP OPTIC SPK H P Line out H P Audio L R SPDIF I2S DDR3 4Gb 2 1600 4Gb 2 1600 8 eMMC 4GB 1 SCART SC_CVBS RGB Audio L R DTV MNT_LR V_OUT LNB HDMI_CEC USB 3 0 USB 2 0 USB 2 0 USB 2 0 USB_W iFi PHY RMII LAN WOL WOW H P AMP H13 LG1154D FRC TCON Logo Light CI CI HDMI4 MHL 1A OCP 1A OC...

Page 61: ...TUNER_T2 C S2 I2C_SDA4 34 35 I2C_SCL4 22 Ω 22 Ω 3 3k Ω 3 3k Ω 3 3V_TU AR16 SCL1 GPIO64 AP16 SDA1 GPIO79 I2C_SDA_MICOM_SOC I2C_SCL_MICOM_SOC 1 2 H13 LG1154D 24 SCL 23 SDA AR17 SDA2 GPIO77 AP17 SCL2 GPIO78 I2C_SDA2_SOC I2C_SCL2_SOC 3 3V_NOR 3 3k Ω 3 3k Ω 33 Ω 33 Ω P60 SCLA0 P61 SDAA0 27 28 SCL SDA D_SCL D_SDA IC6900 A8303SESTR T LNB 7 8 33 Ω 33 Ω SCL SDA AH32 SCL4 AJ33 SDA4 I2C_SDA5 63 62 I2C_SCL5 3...

Page 62: ... VDDC11 H13 D AVDD11 H13 D XTAL 3 3V Normal 4A 1 23V_TU 2A HDMI SW SPDIF Video Driver AUDIO AMP Headphone AMP NVRAM H13 D VDD33 H13 D AVDD33 H13 A VDD33 H13 A AVDD33 H13 A VDD_XTAL EMMC VCC EMMC VCCQ TUNER 3 3V_TU H13 D VDD25 H13 D AVDD25 H13 D XTAL_VDDP H13 D HDMI_VQPS H13 A VDD25_CVBS H13 A VDD25_AUD H13 A VDD25_COMP H13 A VDD25_VSB H13 A VDD25_APLL H13 A AVDD33 H13 A VDD_XTAL H13 A SDRAM_VDDQ H...

Page 63: ...4 I2C_SDA4 22 Ω LNB_OUT 3 3V_NORMAL 3 3K Ω 1 8_TU 3 3V_TU 3 3V_D_Demod CVBS TUNER_SIF 33 Ω 33Ω 33 Ω CI Slot 100 Ω CI_TS_DATA 0 7 PCM_WE PCM_OE PCM_IRQA PCM_REG PCM_INPACK PCM_WAIT PCM_RST CI_DATA 0 7 CI_A_DATA 0 7 CI_ADDR 0 14 CI_A_ADDR 0 14 PCM_IORD PCM_IOWR PCM_CE2 PCM_CE1 CI_VS1 CI_CD1 CI_CD2 CI 5V Power detect PCM_5V_CTL 5V_CI_ON CI_TS_SYNC CI_TS_VAL CI_TS_CLK TP_DVB_DATA0 7 TPO_DATA 0 7 TPI_D...

Page 64: ...Pb Pr Component 1 Phone JACK AV1_CVBS_IN_SOC COMP2_PB_IN_SOC COMP2_Y_IN_SOC COMP2_Y_IN_SOC_SOY COMP2_PR_IN_SOC FULL SCART 18P SC_CVBS_IN CVBS_IN2 SC_CVBS_IN_SOC SC_R SC_G SC_B SC_CVBS_IN_SOY PR1 Y1 PB1 SOY1_IN SC_L R_IN AUAD_L R_CH3_IN AUAD_L R_CH2_IN COMP1 AV1 DVI_L_IN AUAD_L R_CH2_IN PB2 Y2 SOY2 PR2_IN Tuner TU_CVBS TU_CVBS_ISOC CVBS_IN1 TUNER_SIF_TU DIF P N TUNER_SIF ADC_I_INP INN AAD_ADC_SIF A...

Page 65: ...T Tuner AAD_ADC_SIF SCART_MUTE SCART AUDIO L R OUT I2C_SCL1 SDA1 MICOM MICOM AUD_SCART_OUTL OUTR SC_L R_IN SCART_Lout Rout AUD_SCK LRCK LRCH filter AMP_MUTE HP_L ROUT_MAIN SIDE_HP_MUTE DACSCK DACLRCK DACLRCH MAIN 4P wafer AUAD_L_CH2_IN AUAD_L_CH3_IN AUDA_OUTL H13 LG1154 PHY0_ARC_OUT_0 SPDIF_OUT_ARC DTV MNT_L R_OUT TUNER_SIF SCL0 SDA0 LPF TPA6138A2 Headphone AMP LPF HEADPHONE LINE OUT Phone Jack LP...

Page 66: ... 2bits CEC_REMOTE MHL OCP IC3202 TPS2554 MHL_DET SPDIF_OUT_ARC HDMI_INT HDMI_S W_RESET HDMI_HPD_1 5V_HDMI_1 HDMI2 CEC_REMOTE HDMI_HPD_2 5V_HDMI_2 HDMI3 CEC_REMOTE HDMI_HPD_3 5V_HDMI_3 HDMI4 CEC_REMOTE HDMI_HPD_4 5V_HDMI_4 H13D IC100 LG1154D TMDS Link 8bits TMDS Link 8bits TMDS Link 8bits TMDS Link 8bits DDC_I2C 2bits DDC_I2C 2bits DDC_I2C 2bits DDC_I2C 2bits MICOM IC3000 R5F100GEAFB CEC_REMOTE SPD...

Page 67: ...0 39 1 12 EPI_LOCK6_SOURCE EPI_LOCK3 15 14 36 CLK1 2 3 4 5 6 48 43 3 8 VGH_F R 10 9 41 42 VGH_EVEN ODD 12 11 39 40 VCOM_P N VCOM 17 34 VCOM_LOOP VCOMLFB RFB 16 35 GIP_RST 15 36 14 37 VST DISCHG VGL VGL_I 13 38 TX_LOCKN Z_OUT 1 50 VCC18 H_VDD V core VDD VCC18 H_VDD V core VDD VCC18 H_VDD V core VDD H13 IC100 LG1154D LEVEL SHIFTER IC7701 TPS65198 CTRLN VGL_FB SWN PMIC IC7700 TPS65178RSLR VCC CTRLP V...

Page 68: ...Buck 2 converter Vcore Buck 3 converter HVdd Buck 4 converter VCC18 Positive Charge Pump Controller Negative Charge Pump Controller 6 Ch Gamma Buffer DAC output Vcom reference gain Reset PANEL_VCC VCC18 VCC HVdd Vdd VCOM_P VCOM_N GAM4 5 7 12 14 15 CTRLN SWP SWN CTRLP VCOM_LOOP PMIC_RESET Vcore Level Shift TPS65198 TR Diode TR Diode VGL VGH 9 PMIC Level Shift Bloc Diagram ...

Page 69: ..._VBUS_CTRL0 OCP OCP 5V_USB_1 5V_USB_2 USB_OCD1 USB_CTL1 USB_CTL2 USB_OCD2 USB_WIFI WIFI_DM WIFI_DP Motion Remote Receiver M_REMOTE_RX M_REMOTE_TX M_RFModule_RESET UART1_RXD UART1_TXD UART1_RTS UART1_CTS USB2_0_DM USB2_0_DP RENESAS MICOM UART0_RXD UART0_TXD SOC_TX SOC_RX USB_DP3 5V_USB_3 USB_CTL3 USB_OCD3 USB2_1_DM0 USB2_1_DP0 GPIO93 GPIO92 USB2_2_DM0 USB2_2_DP0 USB3 USB_DM3 GPIO91 GPIO90 M_REMOTE_...

Page 70: ...oses LGE Internal Use Only Interconnection 1 1 Main PCB 2 Power Board 3 Local key Assy 1 2 3 4 5 Main LPB 24Pin Local Dimming Cable Main Module EPI Cable 50 50Pin LED driver PSU IR 8Pin Cable WiFi 6Pin RF 8Pin Cable SPK Cable PCBs Cables 6 1 2 3 1 2 3 4 5 6 47LA790V ZA 4 5 4 RF Assy 5 WIFI Assy ...

Page 71: ...013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only 8 7 Interconnection 2 IR to Local Key 3Pin Cable IR to Logo Assy 4Pin Cable Cables 7 8 PCBs 6 IR Assy 6 47LA790V ZA ...

Page 72: ...onics Inc All rights reserved Only for training and service purposes LGE Internal Use Only Introductions of 13Y RF ass y Magic Remote control 1 System 2 Remote Buttons 3 MR13 Block Diagram 4 Function List 5 Pairing Un pairing Method ...

Page 73: ..._ADDR Save also in Receiver Pairing Information Transmission Sequence When it is paired the remote sends packets pairing success F W version BD_ADDR to the receiver The receiver sends the pairing success packet to TV directly F W version and BD_ADDR packets are just saved on the receiver The receiver sends F W version or BD_ADDR packet to TV when it is required Motion Data Transmission Period 7 5m...

Page 74: ...807C Y 0x07 0x8007 Y 0x06 0x8006 Y 0x40 0x8040 Y 0x41 0x8041 Y OK 0x75 0x8044 Y VOICE 0xDE 0x808B Y VOICE_START 3D 0xDC 0x80DC Y Screen RMT Q MENU 0xDE 0x80DE Y CH 0x00 0x8000 Y CH 0x01 0x8001 Y VOL 0x02 0x8002 Y VOL 0x03 0x8003 Y MUTE 0x09 0x8009 Y Logical Buttons AUTO_WAKEUP X 0x800C VOICE_START X 0x800A VOICE_STOP X 0x800D POINT_START X 0x803E POINT_STOP X 0x803F M4 Remote MR13P Remote POWER BA...

Page 75: ...ttery DC DC Boost TI TPS61097 SOT23 5 Power Management Antenna Partron X tal 24 MHz 2 8V LDO uP0108NEC5 28 SC70 512Kb Serial F M I2C ch1 I2C ch2 WM8950 Wolfson Voice MIC Knowles I2S 4 mode Only 2 8V LDO uP0108NEC5 28 SC70 Wheel Encoder IR Emitter1 IR Emitter2 Voice Scene IR Codec ADC Bluetooth Receiver BCM20702M BROADCOM Bluetooth 4 0 Antenna Connector X tal 20 MHz 512Kbit Serial Flash UART SPI Bl...

Page 76: ...owles Sensing Voice Motion Sensor Gyro Sensor Accelerometer MPU 6150 Invensense Sensing angular velocity of X Y Z axis Sensing device tilt Pitch Roll angle RF Micom RF Antenna SDBTPTR3015 Partron Wireless communication X tal 24MHz Partron RF Micom BCM20733A2 Broadcom DC DC Converter TPS61097 TI Battery Boost up Regulator LDO1 uP0108NEC5 28 uPI RF Gyro Accelerometer Power Supply LDO2 uP0108NEC5 28 ...

Page 77: ...75 to TV When TV receive the IR signal it should send pairing request packet to the RF receiver After pairing success the remote should blink LED for some time and TV send pairing success packet back to TV When remote try to unpairing it doesn t care about state of receiver stand alone RF Unpairing Press BACK button and SMART button at the same time for 5 sec When remote try to unpairing it doesn ...

Page 78: ...t 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only 1 Wi Fi built in Ass y feature 2 Wi Fi built in Ass y specification Introductions of 13Y WIFI built in ass y ...

Page 79: ...Internal Use Only WIFI Built in ass y feature PIN USB interface 1 Vcc 2 DM 3 DP 4 GND 5 WOW 6 NC Pin map BCM43236B Wafer 6pin 1 25mm 3 3V USB DP DN GND USB DP DN DCDC EUP3010 Crystal 20MHz 3 3V 1 2V 3 3V 1 2V Switch DM3030 Antenna 2 4G 5G Antenna 2 4G 5G RX TX RX TX WOL Switch DM3030 Block diagram 48 30 ...

Page 81: ...Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only 표지 Widevine HDCP 2 0 NETFLX 2012 12 08 Contents 1 Widevine 2 HDCP 2 0 NETFLIX 3 DTCP 4 Changed BOM LCD TV LCD TV R D Lab HW1 team ...

Page 82: ... this module is required key Currently CP which is requested to widevine is typically Australian Bigpond Live and North American CinemaNow Furthermore because the future will be the spread of CP widevine key download for the global model should be applied to production Because operation unique key should be downloaded for Widevine Widevine key dowmload by NSU is impossible Widevine Key Widevine Ke...

Page 83: ...uthorized interception and copying between a digital set top box or digital video recorder and a digital TV or PC Specification developed by Intel Corporation to protect digital entertainment across the DVI HDMI interface Why HDCP2 0 HDCP revision 2 0 supports a broader range of wired and wireless interfaces Netflix the services maintain a huge selection of movies and latest releases and offer DVD...

Page 84: ...smission mechanisms such as a high performance serial bus that conforms to the IEEE 1394 1995 standard Only legitimate entertainment content delivered to a source device via another approved copy protection system such as the DVD Content Scrambling System will be protected by this protection system Three cryptographic Keys Authentication Key which is formed as a result of authentication and used t...

Page 85: ...right 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only 4 Changed BOM Changed Item Separate HDCP check box HDCP 2 0 Tx HDCP 2 0 Rx HDCP 1 4 Rx As Was Current ...

Page 86: ...or 41 5 Vertical Horizontal bar residual image light spot external device color error 42 6 B Power error No power 43 7 Off when on off while viewing power auto on off 44 8 C Audio error No audio Normal video 45 9 Wrecked audio discontinuation noise 46 10 D Function error Remote control Local switch checking 47 11 External device recognition error 48 12 E Noise Circuit noise mechanical noise 49 13 ...

Page 87: ...hecking method A6 7 LCD TV Version checking method A7 9 A Video error_Color error LCD TV connection diagram A8 10 Tuner Checking Part A9 11 Check Link Cable LVDS reconnection condition 12 Adjustment Test pattern ADJ Key A12 13 A Video error_Vertical Horizontal bar residual image light spot LCD TV connection diagram A8 14 Check Link Cable LVDS reconnection condition 15 Adjustment Test pattern ADJ K...

Page 88: ...rror_Off when on off while viewing POWER OFF MODE checking method A22 27 B Power error_Off when on off while viewing POWER BOARD PIN voltage checking method A19 28 C Audio error_No audio Normal video Checking method in menu when there is no audio A24 29 Voltage and speaker checking method when there is no audio A25 30 C Audio error_Wrecked audio discontinuation Voltage and speaker checking method ...

Page 89: ... or parts Check Power Board 24v output Normal voltage Y Replace Inverter or module N Repair Power Board or parts End Always check record S W Version and White Balance value before replacing the Main Board Replace Main Board Re enter White Balance value Precaution Established date Standard Repair Process Revised date LCD TV Error symptom A Video error No video Normal audio A5 A1 A5 A28 A4 A7 First ...

Page 90: ...E Internal Use Only 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 A5 Established date Revised date LCD TV Error symptom 2012 12 06 ...

Page 91: ...have problem or not By connecting RF Cable at other equipment DVD Player Set Top Box Different maker TV etc SVC Bulletin Replace Main B D Check Tuner soldering Normal Picture Y N Y Close Normal Picture Y Close By using Digital signal level meter By using Diagnostics menu on OSD Menu Set up Support Signal Test Signal strength Normal over 50 Signal Quality Normal over 50 Normal Picture Y Contact wit...

Page 92: ...signal or not Check whether other equipments have problem or not By connecting RF Cable at other equipment Set Top Box Different maker TV etc Y Change satellite setting match with installed ANT N Normal Picture Y Close N A7 Standard Repair Process Established date Revised date LCD TV Error symptom Check satellite setting Check LNB frequency Check satellite Check Satellite connection DiSEqC motor e...

Page 93: ...y input External Input COMPONENT HDMI DVI Y External device Cable normal External Input Component error Check external device and cable Y External device Cable normal RGB HDMI DVI error Check external device and cable Replace Main B D Replace Main B D N N A Video error Color error A8 N Y End Replace module Request repair for external device cable Color error Check Test pattern A12 Standard Repair ...

Page 94: ... Connect other external device and cable Check normal operation of External Input Component RGB and HDMI DVI by connecting Jig pattern Generator Set top Box etc N Y Replace Main B D Screen normal Check screen condition by input External Input Component RGB HDMI DVI Request repair for external device Component error RGB error HDMI DVI Connect other external device and cable Check normal operation o...

Page 95: ...rol Y N Normal operation Check Power On High Check Power cord was inserted properly Check Logo LED Replace Power B D Measure voltage of each output of Power B D N Y Normal voltage Replace Main B D Y OK Replace Main B D N Y Normal Check ST BY 3 5V Replace Power B D N Y Normal voltage Replace Power B D Y A17 A18 A19 A5 Standard Repair Process Established date Revised date LCD TV Error symptom Close ...

Page 96: ...CD TV Error symptom Standard Repair Process Status Power off List Explanation Normal POWEROFF_REMOTEKEY Power off by REMOTE CONTROL POWEROFF_OFFTIMER Power off by OFF TIMER POWEROFF_SLEEPTIMER Power off by SLEEP TIMER POWEROFF_INSTOP Power off by INSTOP KEY POWEROFF_AUTOOFF Power off by AUTO OFF POWEROFF_ONTIMER Power off by ON TIMER POWEROFF_RS232C Power off by RS232C POWEROFF_RESREC Power off by...

Page 97: ...eck user menu Speaker off Off N Y Cancel OFF Check audio B 24V of Power Board Normal voltage 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 video A24 A25 Disconnection Established date Revised date LCD TV Error symptom Standard Repair Process 2012 12 06 ...

Page 98: ...TV Wrecked audio Discontinuation Noise only for Analog Wrecked audio Discontinuation Noise only for External Input Connect and check other external device N Y Normal audio Check and fix external device Replace Power B D N Y Normal voltage Check input signal RF External Input signal Signal normal When RF signal is not received Request repair to external cable ANT provider Y Check audio B Voltage 24...

Page 99: ...plain the customer cause is interference from light in room Check R C Operating When turn off light in room Check Replace Baterry of R C Check Repair Cable connection Connector solder Normal operating Check B 3 5V On Main B D A27 Normal Voltage Close N N Check 3 5v on Power B D Replace Power B D or Replace Main B D Power B D don t have problem A5 Check IR Output signal Normal Signal N Y Repair Rep...

Page 100: ...cal information Check input signal Signal input Y N External Input and Component Recognition error Check and fix external device cable RGB HDMI DVI Optical Recognition error Replace Main B D Replace Main B D Fix in accordance with technical information D Function error External device recognition error Established date Revised date LCD TV Error symptom Standard Repair Process 2012 12 06 ...

Page 101: ...r provide the description If there is a Tak Tak noise from the cabinet refer to the KMS fix information and then proceed as shown in the solution manual For models without any fix information provide the description OR Mechanical noise is a natural phenomenon and apply the 1st level description When the customer does not agree apply the process by stage Describe the basis of the description in Par...

Page 102: ... Use Only Replace module Zoom part with exterior damage Module damage Cabinet damage Replace cabinet Replace remote controller Remote controller damage Stand dent Replace stand F Exterior defect Exterior defect Adjust VCOM Established date Revised date LCD TV Error symptom Standard Repair Process A28 2012 12 06 ...

Page 103: ... Version S W Upgrade SVC Bulletin Normal Picture Y N Y Close Check Wired ethernet cable connection Check whether AP has a probelm or not Setting Network Networ Status Y Try to new network connection match with AP and ether setting N Normal Picture Y Close N A7 Check Network connection Case1 WiFi Check AP status Case2 Wired Check ethernet Port Normal setting Check connection with AP or internet WiF...

Page 104: ...ation Check CAM S W Version CAM S W Upgrade By OTA SVC Bulletin Normal Picture Y N Y Close Check defect CI slot pin Check it s worked CI 1 2 or 1 3 Setting Antenna CI information Y N Check status of CI Key in the In start menu Is there CI key Check damage of CI slot pin Or damage of CI CAM Close N Check Wired Wifi status Cable sub Assy Replace Main B D Replace Main B D Or Download CI Key Old versi...

Page 105: ...Established date Standard Repair Process Detail Technical Manual Revised date A1 Error symptom Content Check LCD back light with naked eye A Video error_No video Normal audio After turning on the power and disassembling the case check with the naked eye whether you can see light from 4 locations XXLA79XX LCD TV 2012 12 06 ...

Page 106: ...l Medium Warm re enter the value after replacing the MAIN BOARD Standard Repair Process Detail Technical Manual Check White Balance value A Video error_No video Normal audio ALL MODELS A4 Established date Revised date Error symptom Content LCD TV Entry method 1 Press the ADJ button on the remote controller for adjustment 2 Enter into White Balance of item 10 3 After recording the R G B GAIN Cut va...

Page 107: ...uring method 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 Board Main Board SMAW200 H24S 1 Power on 2 Inverter On off 3 3 5V 4 PWM Dim 1 5 3 5V 6 PWM Dim 2 7 GND 8 GND 9 24V 10 24V 11 GND 12 GND 13 12V 14 12V 15 12V 16 24V 17 GND 18 GND 19 GND 20 GND 21 GND 22 L DIMO_VS 23 L DIM0_MOSI 24 L DIM0_SCLK 2012 12 06 ...

Page 108: ... MENU support signal test select channel When the signal is strong use the attenuator 10dB 15dB 20dB etc Standard Repair Process Detail Technical Manual TUNER input signal strength checking method A Video error_Video error video lag stop ALL MODELS A6 Established date Revised date Error symptom Content LCD TV 2012 12 06 ...

Page 109: ...andard Repair Process Detail Technical Manual LCD TV Version checking method 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 2012 12 06 ...

Page 110: ...se Only Standard Repair Process Detail Technical Manual LCD TV connection diagram 1 A Video error _Vertical Horizontal bar residual image light spot As the part connecting to the external input check the screen condition by signal A8 Established date Revised date Error symptom Content LCD TV ALL MODELS 2012 12 06 ...

Page 111: ...strength or check whether the screen is normal when the external device is connected 2 After measuring each voltage from power supply finally replace the MAIN BOARD Standard Repair Process Detail Technical Manual TUNER checking part A Video error_Video error video lag stop ALL MODELS A9 Established date Revised date Error symptom Content LCD TV 2012 12 06 ...

Page 112: ...ess Detail Technical Manual Adjustment Test pattern ADJ Key A Video error_Color error 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 Established date Revised date Error symptom Content LCD TV 2012 12 06 ...

Page 113: ...defect CNT Broken T Con Defect CNT Broken T Con Defect CNT Broken T Con Defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Solder defect CNT Broken Abnormal Power Section Solder defect Short Crack Abnormal Power Section Solder defect Short Crack Appendix Exchange EPI Cable or Main B D 1 ...

Page 114: ...r training and service purposes LGE Internal Use Only Abnormal Power Section Solder defect Short Crack Abnormal Power Section Solder defect Short Crack Fuse Open Abnormal power section Noise GRADATION GRADATION Abnormal Display Appendix Exchange EPI Cable or Main B D 2 ...

Page 115: ...63 90 Copyright 2013 LG Electronics Inc All rights reserved Only for training and service purposes LGE Internal Use Only Appendix Exchange LPB LED driver No Light Dim Light Dim Light Dim Light ...

Page 116: ... Only for training and service purposes LGE Internal Use Only Appendix Exchange the Module 1 Panel Mura Light leakage Press damage Crosstalk Crosstalk Press damage Panel Mura Light leakage Press damage Un repairable Cases In this case please exchange the module ...

Page 117: ...orizontal 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 repairable Cases In this case please exchange the module ...

Page 118: ...er error _No power A17 Established date Revised date Error symptom Content LCD TV Front LOGO LED control in the status of ST BY Condition Menu Option LG Logo Light Brightness OFF LOW MIDDLE HIGH 2012 12 06 You can set the LG Logo Light to on or off by selecting OPTION in the main menus Front LOGO LED control in the status of Power On Condition Menu Option LG Logo Light Duration off off after10min ...

Page 119: ...3 3 5V 4 PWM Dim 1 5 3 5V 6 PWM Dim 2 7 GND 8 GND 9 24V 10 24V 11 GND 12 GND 13 12V 14 12V 15 12V 16 24V 17 GND 18 GND 19 GND 20 GND 21 GND 22 L DIMO_VS 23 L DIM0_MOSI 24 L DIM0_SCLK Standard Repair Process Detail Technical Manual Check power input voltage and ST BY 3 5V B Power error _No power A18 Established date Revised date Error symptom Content LCD TV Check the DC 24V 12V 3 5V 2012 12 06 ...

Page 120: ...power is ON B Power error _No power A19 Established date Revised date Error symptom Content LCD TV Check power on pin is high 2012 12 06 24 Pin Power Board Main Board SMAW200 H24S 1 Power on 2 Inverter On off 3 3 5V 4 PWM Dim 1 5 3 5V 6 PWM Dim 2 7 GND 8 GND 9 24V 10 24V 11 GND 12 GND 13 12V 14 12V 15 12V 16 24V 17 GND 18 GND 19 GND 20 GND 21 GND 22 L DIMO_VS 23 L DIM0_MOSI 24 L DIM0_SCLK ...

Page 121: ... 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 method B Power error _Off when on off whiling viewing ALL MODELS A22 Established date Revised date Error symptom Content LCD TV 2012 12 06 ...

Page 122: ... Press the MENU button on the remote controller 2 Select the SOUND function of the Menu 3 Change TV Sound Out to TV Speaker Standard Repair Process Detail Technical Manual Checking method in menu when there is no audio C Audio error_No audio Normal video ALL MODELS A24 Established date Revised date Error symptom Content LCD TV 2012 12 06 ...

Page 123: ...g order when there is no audio Check the contact condition of or 24V connector of Main Board Measure the 24V input voltage supplied from Power Board If there is no input voltage remove and check the connector Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the GND and output terminal the speaker is normal Standard Repair Process Detail Technical Ma...

Page 124: ...he Pre Amp when the power is in ON condition it is normal when the Analog Tester needle moves slowly and defective when it does not move at all Standard Repair Process Detail Technical Manual Remote controller operation checking method D Function error_ No response in remote controller key error ALL MODELS A27 Established date Revised date Error symptom Content LCD TV P4101 1 GND 2 KEY1 3 KEY2 4 3...

Page 125: ...rvice Remote controller 3 Adjust sequence Press the adj key select V COM As pushing the right or the left button on the remote controller And find the V COM value Which is no or minimized the Flicker If there is no flicker at default value Press the exit key and finish the VCOM adjustment Push the OK key to store the value Then the message Saving OK is pop Press the exit key to finish V COM adjust...

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LG 42LA790V, Service Manual

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