LG 32LT670H Service Manual Download | Manualshive

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LGE Internal Use Only

Copyright ©

LG Electronics. Inc. All rights reserved.

Only for training and service purposes

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Summary of Contents for 32LT670H

Page 1: ...ODEL 32LT670H 32LT670H UA CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL LCD 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: ... LG Electronics Inc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 PRODUCT SAFETY 3 SPECIFICATION 4 ADJUSTMENT INSTRUCTION 6 TROUBLESHOOTING 16 BLOCK DIAGRAM 22 EXPLODED VIEW 23 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: ...llowed each drawing and specification by part number in accordance with BOM 5 The receiver must be operated for about 5 minutes prior to the adjustment 3 Test method 1 Performance LGE TV test method followed 2 Demanded other specification Safety UL CSA IEC specification EMC FCC ICES IEC specification 4 General Specification No Item Specification Remark 1 Receiving System 1 ATSC NTSC M 64 256 QAM 2...

Page 5: ...68 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 1280 768 47 776 59 870 79 5 CVT WXGA Х 7 1360 768 47 712 60 015 85 50 VESA WXGA O DTV 1 720 480 31 47 60 27 027 SDTV 480P 2 720 480 31 47 59 94 27 00 SDTV 480P 3 1280 720 45 00 60 00 74 25 HDTV 720P 4 1280 720 44 96 59 9...

Page 6: ...y if needed Both Board level and Final assembly adjustment items can be check using In Start Menu 1 ADJUST CHECK RGB PC Adjust will be calculated by 480i adjust value 3 2 Final assembly adjustment 1 White Balance adjustment 2 RS 232C functionality check 3 Factory Option setting per destination 4 Shipment mode setting In Stop 3 3 Etc 1 Shipment conditions 2 Service Option Default 3 USB Download S W...

Page 7: ...Model 8Bit HDMI 1 FHD 10BIT C S 989B EDID Block 0 Bytes 0 127 00H 7FH 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 01 00 01 01 01 01 10 01 16 01 03 80 A0 5A 78 0A EE 91 A3 54 4C 99 26 20 0F 50 54 A1 08 00 81 80 61 40 45 40 31 40 01 01 30 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C 40 45 00 40 84 63 00 00 1E 66 21 50 B0 51 00 1B 30 50 40 70 36 00 40 84 63 00 00 1E 00 00 00 FD...

Page 8: ...02 03 1C F1 47 90 22 20 05 04 03 02 23 09 57 07 10 67 03 0C 00 10 00 80 1E E3 05 03 01 02 3A 80 18 20 71 38 2D 40 58 2C 04 05 40 84 63 00 00 1E 01 1D 30 80 18 71 1C 16 20 58 2C 25 00 40 84 63 00 00 9E 40 01 1D 00 72 51 D0 1E 20 6E 28 55 00 40 84 63 00 50 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E 96 00 40 84 60 63 00 00 18 26 36 80 A0 70 38 1F 40 30 20 25 00 70 40 84 63 00 00 1A 00 00 00 00 00 00 00 00 0...

Page 9: ... 00 72 51 D0 1E 20 50 6E 28 55 00 40 84 63 00 00 1E 00 00 00 FD 00 39 60 3F 1F 3C 09 00 0A 20 20 20 20 20 20 00 00 00 FC 70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 1A EDID Block 1 Bytes 128 255 80H FFH 0 1 2 3 4 5 6 7 8 9 A B C D E F 0 02 03 1C F1 47 10 22 20 05 84 03 02 23 09 57 07 10 67 03 0C 00 20 00 80 1E E3 05 03 01 02 3A 80 18 20 71 38 2D 40 58 2C 04 05 40 84 63 00 00 1E 01 1D 30 80 18 ...

Page 10: ...sing no signal or Full white pattern 6 1 2 Equipment 1 Color Analyzer CA 210 NCG CH 9 WCG CH12 LED CH14 2 Adj Computer During auto adj RS 232C protocol is needed 3 Adjust Remocon 4 Video Signal Generator MSPG 925F 720p 204 Gray Model 217 Pattern 49 Only when internal pattern is not available Color Analyzer Matrix should be calibrated using CS 1000 6 1 3 Equipment connection MAP 6 1 4 Adjustment Co...

Page 11: ...ould be within 10cm and perpendicular of the module surface 80 100 3 Aging time After Aging Start Keep the Power ON status during 5 Minutes In case of LCD Back light on should be checked using no signal or Full white pattern 6 1 6 Reference White Balance Adj coordinate and color temperature Luminance 204 Gray 80IRE LGD Module over 26inch Standard color coordinate and temperature using CA 210 CH 14...

Page 12: ...to Stand by mode 7 GND and HI POT Test 7 1 GND HI POT auto check preparation 1 Check the POWER CABLE and SIGNAL CABE insertion condition 7 2 GND HI POT auto check 1 Pallet moves in the station POWER CORD AV CORD is tightly inserted 2 Connect the AV JACK Tester 3 Controller GWS103 4 on 4 GND Test Auto If Test is failed Buzzer operates If Test is passed execute next process Hi pot test Remove A V CO...

Page 13: ...idn t have a DTV ATV test on production line After downloading TOOL OPTION setting is needed again 1 Push IN START key in service remote controller 2 Select Tool Option 1 and Push OK button 3 Punch in the number Each model has their number 10 Conditions ST_BY Consumption Power Have to turn off ST_BY Light USA 110V 60Hz KOREA 220V 60Hz Menu Option Power Indicator ST_BY Light OFF 11 Test factor for ...

Page 14: ...not Sine wave with 1KHz will be displayed 3 Check Both of the signal in speaker only Power Fived 1W Default Check the input signal 1KHZ Sine wave and the wave of output by utilizing oscilloscope 13 LAN Main board Check 13 1 Overview It is LNET RF modem FTG card 13 2 Equipment 1 b_LAN Checker UTC 1000 with Cable accessory 2 Computer for test result monitoring 3 Connection JIG 13 3 Equipment connect...

Page 15: ... RJ21 TV LINK CFG Phone Jack UTC 1000 RF1 b_LAN RF IN 2 Power on JIG Switch on front of the JIG 3 Test Start UTC 1000 TOP2 JIG 11pin Connection 4 Checking b LAN MAC Address Check whether it is same their address numbers or not between B LAN Label and on the pc address numbers Checking JIG contents 1 Check whether displaying all Pass or not at the number 3 4 6 7 9 contents of UTC 1000 on the PC 2 C...

Page 16: ...ignal OK N Replace Power Board Check Q409 application circuit Or replace Q409 N Replace Cable N No OSD Trouble Shooting guide Check P401 All Voltage Level 3 5V 12V 24V Y N Check IC5002 RESET and UPDATE pin Y Check X5000 Clock 32 768MHz Y Check IC5002 IIC Communication status Y Check IR input state of IC5002 57pin Y Re download PTC Micom Check power connector and RL_ON signal OK N Replace Power Boa...

Page 17: ...alog RF Video Trouble Shooting guide Check RF cable signal Y Check TU3001 Pin7 Video output Y Check tuner 5V power L3000 Y Check tuner 3 3V power L3001 Y Check tuner 1 8V power IC3000 2pin 1 8V Y Check Mstar LVDS output Replace Tuner N Check IC5000 Replace L3001 Replace IC3000 N N N Replace IC101 N Replace IC5000 N Y ...

Page 18: ...rvice purposes Digital RF Trouble Shooting guide Check RF cable signal Check tuner 5V power L3000 Y Check IIC Signal TU3001 Pin 3 4 Y Check DIF Signal TU3001 Pin 10 11 Y Check X201 and application circuit Check IC5000 Replace TU3001 Replace TU3001 N N N Replace IC101 N Replace IC5000 N Y Replace X201 ...

Page 19: ... troubles After checking thoroughly all path once again You should decide to replace Mstar or not Replace JK1700 N HDMI Video Trouble Shooting guide Check input signal format Is it supported Y Check AC cable for damage For damage or open conductor Y Check JK800 JK801 JK802 Can you see the normal waveform Y Check HDCP key NVRAM IC103 Power I2C signal Y Check the input of Mstar IC101 Measure wavefor...

Page 20: ...easure waveform at R4025 R4042 because it s more easy to check Can you see the normal waveform Y This board has big problem because Main chip Mstar have some troubles After checking thoroughly all path once again You should decide to replace Mstar or not Replace P900 N Analog RF Audio Trouble Shooting guide Check RF cable signal Check TU3001 Pin1 SIF output Y Check Audio AMP output L503 L504 L505 ...

Page 21: ...veform Y This board has big problem because Main chip Mstar have some troubles After checking thoroughly all path once again You should decide to replace Mstar or not Replace JK1700 P800 N Check Audio AMP output L503 L504 L505 L506 Replace L503 L504 L505 L506 N Y Check input signal format Is it supported Y Check AC cable for damage For damage or open conductor Y Check JK800 JK801 JK802 Can you see...

Page 22: ...S RE WE RX TX Micom MSP430F5419IPZR IC5002 24MHz JACK PACK JACK PACK at REAR at REAR SCL SDA_3 3V RF S7LR LGE2111A TE IC101 RS 232C SVC S W Reset EXT_OUT I2C SCL SDA S_FLASH 8M bit MX25L8006EM2I 12G IC200 Power AMP TPA6011A4PWPRG4 IC1800 JK1801 JK1800 RJP_CTRL JK5000 Pro Idom LGDT1001 IC1209 TS_CLK VALID SYNC 0 7 PM_TS_CLK VALID SYNC 0 7 TMMB H002F B LAN TV link CFG Game control TV link CFG Game c...

Page 23: ...e 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 manufacturer IMPORTANT SAFETY NOTICE 300 200 510 500 120 530 550 810 521 800 LV1 400 910 900 540 Set S...

Page 24: ...PIO104 AA19 PCMADR 13 GPIO107 AC21 PCMADR 14 GPIO106 AA17 PCMREG_N GPIO123 Y20 PCMOE_N GPIO113 AB15 PCMWE_N GPIO197 AA22 PCMIORD_N GPIO111 AD22 PCMIOWR_N GPIO109 AD20 PCMCE_N GPIO115 AD21 PCMIRQA_N GPIO105 AC20 PCMCD_N GPIO130 Y18 PCMWAIT_N GPIO100 Y21 PCM_RESET GPIO129 Y22 PCM2_CE_N GPIO131 U21 PCM2_IRQA_N GPIO132 V21 PCM2_CD_N GPIO135 R20 PCM2_WAIT_N GPIO133 T20 PCM2_RESET GPIO134 U22 UART1_TX G...

Page 25: ...6 HOTPLUGD GPIO22 P5 CEC GPIO5 R4 HSYNC0 P2 VSYNC0 R3 RIN0P N2 RIN0M P3 GIN0P N3 GIN0M N1 BIN0P M3 BIN0M M2 SOGIN0 M1 HSYNC1 V2 VSYNC1 V3 RIN1P U3 RIN1M U2 GIN1P T1 GIN1M T2 BIN1P R2 BIN1M R1 SOGIN1 T3 HSYNC2 AA2 RIN2P Y2 RIN2M AA3 GIN2P W2 GIN2M Y3 BIN2P V1 BIN2M W3 SOGIN2 W1 CVBS0 AA8 CVBS1 Y4 CVBS2 W4 CVBS3 AA5 CVBS4 Y5 CVBS5 AA4 CVBSOUT0 Y6 CVBSOUT1 AA1 VCOM AB4 VIFP AC4 VIFM AD3 IP AC3 IM AE3...

Page 26: ...1 10W 1 21K 1 R447 PD_ 12V RL_ON 1 R473 FM20020 24 P404 NORMAL_32 19 14 9 4 18 13 8 3 17 12 7 2 16 11 6 1 20 15 10 5 21 22 23 24 25 3K R405 1 PANEL_DISCHARGE_RES 0 1uF 16V C408 OPT 0 1uF 16V C412 PD_ 12V 10K OPT R446 22K R435 OPT PANEL_VCC 8 2K 1 R482 POWER_ 24V 0 1uF 50V C418 0 POWER_18_A_DIM R451 3K PANEL_DISCHARGE_RES R407 1 100pF 50V C439 3 5V_ST 0 1 u F 16V C475 3 5V_ST 10K R426 100 R402 10K ...

Page 27: ...ENSOR_SDA 3 3V_Normal 18pF 50V OPT C2409 0 R2427 12507WR 12L P2401 OLD_SUB 1 2 3 4 5 6 7 8 9 10 11 12 13 3 5V_ST 0 1uF 16V C2405 JP2410 22 R2428 10K 1 R2404 KEY1 47K R2426 IR 0 1uF 16V C2410 OPT KEY2 JP2409 100 R2401 12507WR 15L P2402 NEW_SUB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 16 15 100 R2411 EYEQ TOUCH_KEY 10K R2416 OPT BLM18PG121SN1D L2404 1000pF 50V C2406 2SC3052 Q2405 OPT E B C 10K R2430 OPT 18p...

Page 28: ...EAN61849601 IC1450 3 IN_2 2 IN_1 4 EN 1 GND 5 FLG 6 OUT_1 7 OUT_2 8 NC CIS21J121 L1451 1 USB DOWN STREAM 3AU04S 305 ZC LG JK1450 USB_JACK 1 2 3 4 5 5V_USB 10uF 10V C1452 USB1_OCD SIDE_USB_DM 0 1uF C1453 1 8W 2K 1 R1458 1 8W 2K 1 R1459 USB DOWN STREAM 3AU04S 345 ZC H LG JK1450 1 USB_JACK_LV3400 1 2 3 4 5 4 7K OPT R1455 RCLAMP0502BA D1451 OPT SIDE_USB_DP 3 3V_Normal 22uF 16V C1451 47 R1451 20101023 ...

Page 29: ...806 D1 _HDMI2 DDC_SCL_1 CK _HDMI4 JP806 EAG59023302 JK802 HDMI_1 14 13 5 D1_GND 20 SHIELD 12 11 2 D2_GND 19 18 10 CK 4 D1 1 D2 17 9 D0 8 D0_GND 3 D2 16 7 D0 6 D1 15 CK _HDMI2 SI1012CR T1 GE3 Q806 OPT S D G 0 1uF 16V C805 OPT 5V_DET_HDMI_1 GND 10K R830 D0 _HDMI2 CK _HDMI1 0 1uF 16V C802 D1 _HDMI1 DDC_SDA_4 AVRL161A1R1NT OPT D803 0 R841 1K R897 68K OPT R857 10K R807 1K R895 2SC3052 Q802 E B C D1 _HD...

Page 30: ...SUB_B 10K R1146 75 R1133 30V D1112 1K R1147 22 R1143 5V_Normal 75 R1137 RGB_DDC_SCL 68pF 50V OPT C1126 18pF 50V C1127 75 R1135 22 R1141 5 6V OPT D1116 30V D1109 SPG09 DB 010 JK1104 1 RED 2 GREEN 3 BLUE 4 GND_1 5 DDC_GND 6 RED_GND 7 GREEN_GND 8 BLUE_GND 9 NC 10 SYNC_GND 11 GND_2 12 DDC_DATA 13 H_SYNC 14 V_SYNC 15 DDC_CLOCK 16 SHILED DSUB_G 5 6V D1117 OPT ENKMC2838 T112 D1115 A1 C A2 DSUB_R DSUB_VSY...

Page 31: ...OUT R55 EXT_PWR_DET EXT_12V 1K POWER_OUT R66 0 1uF 50V PSU_POWER_OUT C53 43 POWER_OUT R65 1 16W 270K 1 PSU_POWER_OUT R56 1K POWER_OUT R63 10K POWER_OUT R68 0 1uF C1102 18K PSU_POWER_OUT R50 0 1uF 50V PSU_POWER_OUT C51 24V 3 5V_ST 3 5V_ST EAN41348201 MAX3232CDR IC1101 3 C1 2 V 4 C2 1 C1 6 V 5 C2 7 DOUT2 8 RIN2 9 ROUT2 10 DIN2 11 DIN1 12 ROUT1 13 RIN1 14 DOUT1 15 GND 16 VCC 22 PSU_POWER_OUT R54 0 1u...

Page 32: ...R_FHD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 RXA2 RXA0 0 1uF 16V HD C703 RXB1 0 1uF 16V C710 WAFER_FHD FF10001 30 P705 HD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 RXB2 RXB4 RXA0 RXA1 RXA0 PANEL_VCC 1000pF 50V OPT C702 RXA3 10K OPT R711 120 ohm HD L7...

Page 33: ...2 VSSQ_6 E8 VSSQ_7 F9 VSSQ_8 G1 VSSQ_9 G9 0 1 u F C1203 B MVREFDQ 1K 1 R1227 0 1 u F C1228 A MWEB 0 1 u F C1248 B MCASB 0 1 u F C1222 0 1 u F C1215 A MA8 B MA6 B MVREFCA B MDQL5 B MCKE B MCKE A MRASB A MVREFCA A MDQL5 10uF C1205 B MA7 A MA0 A MDQU4 0 1 u F C1232 A MDQU5 B MA13 NT5CB64M16DP CF EAN61857201 DDR_1333_NANYA_NEW IC1202 2 A0 N3 A1 P7 A2 P3 A3 N2 A4 P8 A5 P2 A6 R8 A7 R2 A8 T8 A9 R3 A10 AP...

Page 34: ...CK 3 5V_ST KRC103S Q1401 OPT E B C 3 5V_ST 0 1uF C1401 4 7K R1404 OPT SPI_CS SPI_SDO MX25L8006EM2I 12G IC1401 S_FLASH_MAIN_MACRONIX 3 WP 2 SO SIO1 4 GND 1 CS 5 SI SIO0 6 SCLK 7 HOLD 8 VCC 33 R1405 10K R1403 OPT SPI_SDI FLASH_WP 0 OPT R1401 W25Q80BVSSIG IC1401 1 S_FLASH_MAIN_WINBOND 3 WP IO2 2 DO IO1 4 GND 1 CS 5 DI IO0 6 CLK 7 HOLD IO3 8 VCC 3 5V_ST SFLASH 20110324 13 GP3_S7LR Copyright ⓒ 2012 LG ...

Page 35: ...V_TU AP1117EG 13 HALF_NIM_1 2V_DIODES IC3703 1 ADJ GND OUT IN 3 3V_TU 3 3V_TU MLG1005SR27JT R3735 1 TU_I2C_FILTER 18pF 50V C3713 TU_I2C_NON_FILTER 20pF 50V C3711 1 TU_I2C_FILTER 1K OPT R3750 1 2K R3740 TU_IIC_ATSC_SANYO 470 R3755 BUFFER 0 1uF 16V C3702 33 R3736 TU_I2C_NON_FILTER 1K R3741 1 TU_IIC_NON_ATSC_SANYO 1 2K R3741 TU_IIC_ATSC_SANYO 3 3V_TU TU_SIF 3 3V_Normal 20pF 50V C3743 TU_I2C_FILTER 10...

Page 36: ...PVDD2_2 24 PVDD2_3 25 OUT2A_1 26 OUT2A_2 27 PGND2A 28 BST2A 29 VDR2 30 GND_2 31 VCC_5 32 VDR1 33 BST1B 34 PGND1B 35 OUT1B_1 36 OUT1B_2 37 PVDD1_1 38 PVDD1_2 39 PVDD1_3 40 OUT1A_1 41 OUT1A_2 42 PGND1A 43 BST1A 44 RESET 45 AD 46 GND_IO 47 CLK_I 48 VDD_IO 49 E P 4 7K R519 0 1uF 50V C520 2SC3052 Q501 E B C 0 47uF 50V C535 3 3K R505 10 0uH L505 1N4148W 100V OPT D502 12 R508 1N4148W 100V OPT D503 4 7K R...

Page 37: ...618 220pF 50V OPT C1648 AV_CVBS_DET 22 EU_OPT R1627 75 EU_OPT R1616 BLM18PG121SN1D EU_OPT L1602 SCART1_Rout 15K EU_OPT R1623 10uF 16V EU_OPT C1645 SC1_B COMP1_Pb AV_R_IN 10K EU_OPT R1668 SC1 COMP1_DET SC1_R COMP1_Pr 30V D1605 0 1uF EU_OPT C1636 75 R1605 3 3V_Normal 5 6V OPT D1608 390 EU_OPT R1635 DTV MNT_R_OUT 10K R1613 DTV MNT_R_OUT 390 R4211 EU_OPT 330pF 50V C1662 REAR_AV 12K R1689 REAR_AV 1000p...

Page 38: ...ormal 51K R1827 EXT_SPK 100 R1828 EXT_SPK 4 7K R1836 EXT_SPK 0 1uF 16V C1837 EXT_SPK EXT_OUT_L 17 Y27 THERMAL TS4962 IC1800 EXT_SPK 3 IN 2 NC 4 IN 1 STBY 5 OUT 6 VCC 7 GND 8 OUT 9 EP GND 0 R1843 EXT_SPK 15 R1838 EXT_SPK PNP Q1801 EXT_SPK E B C 1 5K R1839 EXT_SPK 15 R1837 EXT_SPK EXT_R_AMP_IN 11 U22 15pF 50V C1833 EXT_SPK 0 R1842 EXT_SPK EXT_L_AMP_IN 11 U22 15pF 50V C1834 EXT_SPK 1 5K R1840 EXT_SPK...

Page 39: ...01 CI_SLOT_OR_GATE_NXP 3 GND 2 A 4 Y 1 B 5 VCC CI_ADDR 3 CI_TS_VAL PCM_A 14 CI_ADDR 11 PCM_WAIT CI_TS_SYNC 0 1uF C1902 33 AR1909 CI_IOWR 0 1 u F 16V C1908 OPT 47 R1902 REG CI_MDI 7 CI_ADDR 13 GND PCM_OE CI_MDI 3 CI_MDI 4 PCM_A 4 2 2K R1922 TOSHIBA TC74LCX244FT 0ITO742440D IC1902 3 2Y4 2 1A1 4 1A2 1 1OE 6 1A3 5 2Y3 7 2Y2 8 1A4 9 2Y1 10 GND 11 2A1 12 1Y4 13 2A2 14 1Y3 15 2A3 16 1Y2 17 2A4 18 1Y1 19 ...

Page 40: ... BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC MDL61930001 6 5T_GAS5 GAS5 MDL61930001 GAS3 6 5T_GAS3 MDL61930001 6 5T_GAS6 GAS6 MDL61930001 6 5T_GAS2 GAS2 MDL61930001 6 5T_GAS1 GAS1 MDL61930001 6 5T_GAS7 GAS7 MDL61930001 6 5T_GAS4 GAS4 SMD_GAS 20110324 20 GP3_S7LR SMD GASKET Copyright ⓒ 2012 LG Electronics Inc All right reserved Only for training and service purposes LGE ...

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