LG 32LH570B Service Manual Download Page 49 | Manualshive

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background image

No audio

Screen normal

Check user

Connection fro

m Main



Spe

aker Cable

N

Y

Insert wafer SPK Cable

Replace Speaker

or Main B/D

Connec

tion

LCD TV

Error Symptom

C. Audio Error

Established date

2016.01.29

9/14

Content

No audio / Normal video

Revised date

Standard Repair Process

☞

A15

Normal

Audio

End

Y

N

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Summary of Contents for 32LH570B

Page 1: ...Printed in Korea P NO MFL69442201 1601 REV00 CHASSIS LA66K MODEL 32LH550B CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL LED TV SERVICE MANUAL Internal Use Only ...

Page 2: ...ed Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 9 BLOCK DIAGRAM 17 EXPLODED VIEW 18 PRODUCT DISASSEMBLY PROCESS 19 SCHEMATIC CIRCUIT DIAGRAM APPENDIX TROUBLESHOOTING APPENDIX ...

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: ...lectrostatic charge on your body by touching a known earth ground Alter natively obtain and wear a commercially available discharging wrist strap device which should be removed to prevent poten tial 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...

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: ...t be operated for about 20 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 Result Remark 1 Receiving System ATSC NTSC M 64 256 QAM 2 Available Channel VHF 02 13 UHF 14 69 DTV 02 69 CATV 01 135 CADTV 01 135 3 Input Voltag...

Page 7: ...80I 3 720 480 31 500 60 000 27 027 SDTV 480P 4 720 480 31 470 59 940 27 000 SDTV 480P 5 1280 720 45 000 60 000 74 250 HDTV 720P 6 1280 720 44 960 59 940 74 176 HDTV 720P 7 1920 1080 33 750 60 000 74 250 HDTV 1080I 8 1920 1080 33 720 59 940 74 176 HDTV 1080I 9 1920 1080 67 500 60 000 148 500 HDTV 1080P 10 1920 1080 67 432 59 940 148 352 HDTV 1080P 11 1920 1080 27 000 24 000 74 250 HDTV 1080P 12 192...

Page 8: ...8 5 WUXGA Reduced Blanking FHD only DTV 1 640 480 31 46 59 94 25 125 SDTV 480P 2 640 480 31 5 60 00 25 125 SDTV 480P 3 720 480 15 73 59 94 13 500 SDTV 480I Spec out but display 4 720 480 15 75 60 00 13 514 SDTV 480I Spec out but display 5 720 480 31 47 59 94 27 00 SDTV 480P 6 720 480 31 5 60 27 027 SDTV 480P 7 1280 720 44 96 59 94 74 176 HDTV 720P 8 1280 720 45 60 00 74 25 HDTV 720P 9 1920 1080 33...

Page 9: ...s hatch pattern 09ch there can some afterimage in the black level area 3 Adjustment items 3 1 Main PCBA Adjustments 1 ADC adjustment OTP Component 2 EDID downloads for HDMI 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 5 GND and HI POT test 3 3 Appendix 1 Tool option menu USB Download ...

Page 10: ... Jack 3 Play Test F9 button and confirm OK Message 4 remove LAN CABLE Step 1 Step 3 Check OK Signal 4 4 EDID Download 4 4 1 Overview It is a VESA regulation A PC or a MNT will display an optimal resolution through information sharing without any necessity of user input It is a realization of Plug and Play 4 4 2 Equipment Since embedded EDID data is used EDID download JIG HDMI cable and D sub cable...

Page 11: ...ed Only for training and service purposes 2 HDMI2 6D 86 4 4 3 3 HD DTS 2D 8bit xvYCC off 32LH570B UC 1 HDMI1 6D 8D 2 HDMI2 6D 7D 4 4 3 4 FHD PCM 2D 8bit xvYCC off 43 49 55LH5700 UD 1 HDMI1 E5 CC 2 HDMI2 E5 BC 4 4 3 5 FHD AC3 2D 8bit xvYCC off 43 49 55LH5700 UD 1 HDMI1 E5 5A ...

Page 12: ...fore White balance adjustment Keep power on status don t power off 5 1 1 2 Adj condition and cautionary items 1 Lighting condition in surrounding area surrounding lighting should be lower 10 lux Try to isolate adj area into dark surrounding 2 Probe location Color Analyzer CA 210 probe should be within 10cm and perpendicular of the module surface 80 100 3 Aging time After Aging Start Keep the Power...

Page 13: ... as end command wb 00 ff and Adj offset if need 5 1 5 2 Manual adjustment 1 Set TV in Adj mode using POWER ON 2 Zero Calibrate the probe of Color Analyzer then place it on the center of LCD module within 10cm of the surface 3 Press ADJ key EZ adjust using adj R C à 9 White Balance then press the cursor to the right KEY When KEY is pressed 206 Gray internal pattern will be displayed 4 Adjust Cool m...

Page 14: ...6 9 279 284 294 303 321 343 4 10 19 277 280 292 299 319 339 5 20 35 275 277 290 296 317 336 6 36 49 274 274 289 293 316 333 7 50 79 273 272 288 291 315 331 8 80 119 272 271 287 290 314 330 9 Over 120 271 270 286 289 313 329 3 O S Module AUO INX Sharp CSOT BOE cool med warm x y x y x y spec 271 270 286 289 313 329 target 278 280 293 299 320 339 5 2 Option selection per country 5 2 1 Overview 1 Tool...

Page 15: ...ne wave signal 100 Modulation 2 CVBS Component 1KHz sine wave signal 0 4Vrms 6 2 Specification No Item Min Typ Max Unit Remark 1 Audio practical max Output L R Distor tion 10 max Output 4 5 6 0 5 0 6 32 6 0 6 93 W Vrms 1 Measurement condition EQ AVL Clear Voice Off 2 Speaker 6Ω Impedance 3 49 43LH57 2 2 7 4 03 3 0 4 24 3 6 4 64 W Vrms 1 Measurement condition EQ AVL Clear Voice Off 2 Speaker 6Ω Imp...

Page 16: ...h in the number Each model has their number 10 Optional adjustments 10 1 Manual White balance Adjustment 10 1 1 Adj condition and cautionary items 1 Lighting condition in surrounding area surrounding lighting should be lower 10 lux Try to isolate adj area into dark surrounding 2 Probe location Color Analyzer CA 210 probe should be within 10cm and perpendicular of the module surface 80 100 3 Aging ...

Page 17: ...MP Digital Demod IF Sub Micom R5F100GEAFB IR KEY IR KEY I2C HDMI MUX LVDS USB SPDIF OUT ETHERNET USB1 OCP 1 5A HDMI1 ARC REAR OPTIC LAN 51P DDR3 1866 2Gb x16 X_TAL 24MHz WIFI SUB ASSY USB_WIFI Tuner DDR3 1866 2Gb x16 HDMI2 SIDE CVBS YPbPr AV COMP REAR EEPROM 256Kb eMMC 5 0 4GB I2S I2C I2C I2C Analog Demod HD Model 30P RS 232 RS 232 RS 232 US Only ...

Page 18: ...elated 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 Shock Fire or other Hazards Do not modify the original design without permission of manufacturer IMPORTANT SAFETY NOTICE 400 570 540 521 500 600 522 LV1 200 900 A2 700 120...

Page 19: ...low 1 Unlock screw A 10EA to separate back cover assembly Fig 1 2 Separate speaker assembly from back cover Separate the cushion B C D from backcover Separate the WIFI board L from backcover Unlock screw E 2EA to separate the base Fig 2 3 Unlock screw F 4EA to sepparate main board and AV bracket H I Fig 3 4 Separate the receive assembly from front cover Separate the cushion J from receive board Se...

Page 20: ... 20 LGE Internal Use Only Copyright LG Electronics Inc All rights reserved Only for training and service purposes A A A A A A A A A A Fig 1 Fig 2 B C E D E L ...

Page 21: ... 21 LGE Internal Use Only Copyright LG Electronics Inc All rights reserved Only for training and service purposes J K F F F F H I Fig 3 Fig 4 ...

Page 22: ...9 TS1_D 5 AB21 TS1_D 6 AA19 TS1_D 7 AA20 TS1_CLK Y20 TS1_VLD Y21 TS1_SYNC Y19 TS0_D 0 AF20 TS0_D 1 AC21 TS0_D 2 AE21 TS0_D 3 AF21 TS0_D 4 AC19 TS0_D 5 AD20 TS0_D 6 AE20 TS0_D 7 AE19 TS0_CLK AD19 TS0_VLD AE22 TS0_SYNC AD21 TS2_SYNC AB22 TS2_CLK AC22 TS2_VLD AC23 TS2_D 0 AB23 NC_1 AC3 NC_2 AB2 NC_3 AB3 NC_4 AA1 NC_5 AC2 NC_6 AC4 VIFP AF4 VIFM AE4 SIFP AF5 SIFM AE5 IFAGC AD4 TGPIO0 AB4 TGPIO1 AD5 TGP...

Page 23: ...V BIT6 COMP2_Y AV_CVBS_IN R356 100 D0 _HDMI1 10uF 10V C312 C365 0 1uF 16V 1 10V_VDDC TU_CVBS BIT4 COMP2_Pr C372 22pF OPT DDC_SDA_3 10uF 10V C328 R308 33 HP_DET MODEL_OPT_12 R357 100 D0 _HDMI2 C303 2 2uF C353 0 1uF 16V C336 0 047uF CK _HDMI2 MODEL_OPT_13 C373 22pF OPT BIT1 COMP2_L_IN C363 0 1uF 16V C344 0 1uF 16V CK _HDMI1 R358 100 D1 _HDMI2 COMP2_R_IN C345 1000pF OPT TP313 D1 _HDMI3 C374 33pF OPT ...

Page 24: ...LK A15 B MCLKZ B14 B CSB0 D9 B DQ 0 F19 B DQ 1 D15 B DQ 2 E18 B DQ 3 E16 B DQ 4 E19 B DQ 5 F16 B DQ 6 D18 B DQ 7 E15 B DQM 0 E17 B DQS 0 F18 B DQSB 0 F17 B DQ 8 B16 B DQ 9 A18 B DQ 10 B15 B DQ 11 A19 B DQ 12 C16 B DQ 13 B19 B DQ 14 C15 B DQ 15 B18 B DQM 1 D19 B DQS 1 C17 B DQSB 1 B17 A RCS RA14 ARBA0 C536 0 1uF C511 0 1uF C540 0 1uF ARBA2 H5TQ4G63CFR TEC IC501 DDR_HYNIX_4Gb A0 N3 A1 P7 A2 P3 A3 N2...

Page 25: ...GND_1 7 ITH 9 SS 10 SW_1 11 SW_2 12 SW_3 13 BOOT 14 PGD 15 EN 16 AVIN 5 AGND 8 MODE 6 FB 4 PGND_2 2 PVIN_2 17 EP FIN ZD2302 2 5V OPT C2348 10uF 10V R2346 8 2K 1 R2331 0 C2339 10uF 10V C2311 10uF 10V C2328 0 1uF 16V OPT C2316 0 1uF 16V ZD2303 2 5V OPT R2332 100K C2357 10uF 10V R2340 330K 5 R2335 8 2K 1 16W 1 POWER_ON OFF2_1 3 4V_ST POWER_ON OFF2_2 C2306 10uF 25V C2337 0 22uF 16V 1 10V_VDDC C2314 0 ...

Page 26: ...OC HDMI_CEC POWER_ON OFF2_1 PANEL_CTL C3005 2 2uF 10V R3003 2 7K SOC_RESET MICOM_RESET R3029 33 R3005 1K R3006 100 TP3003 MODEL1_OPT_3 R3017 0 MODEL1_OPT_2 R3015 27K C3001 0 47uF 3 3V_SB Q3001 NPN_NXP_2nd E B C R3014 270K OPT POWER_ON OFF1 R3011 4 7M OPT R3018 10K PWM1 WOL ETH_POWER_ON LED_R R3019 2 7K MODE_SELECT POWER_DET RETENTION_DISABLE KEY1 AMP_MUTE INV_CTL RL_ON 3 4V_ST WOL ETH_POWER_ON IR ...

Page 27: ...01 56219 EAG63530103 CNPLUS_2nd 14 ARC 13 CE_REMOTE 5 D1_GND 20 BODY_SHIELD 12 CK 11 CK_GND 2 D2_GND 19 HP_DET 18 5V 10 CK 4 D1 1 D2 17 GND 9 D0 8 D0_GND 3 D2 16 DDC_DATA 7 D0 6 D1 15 DDC_CLK Q3200 1 MMBT3904 NXP HPD_TR_NXP_2nd E B C Q3200 2N3904S HPD_TR_KEC_1st E B C Q3201 2N3904S EXT_EDID_TR_KEC_1st E B C Q3201 1 MMBT3904 NXP EXT_EDID_TR_NXP_2nd E B C Q3202 1 MMBT3904 NXP HPD_TR_NXP_2nd E B C Q3...

Page 28: ...OLE JK3401 PPJ245 31 5A GN YL O SPRING 6A GN YL E LUG 4A GN YL CONTACT 5B BL O SPRING 7C RD1 E LUG S 5C RD1 O SPRING 4C RD1 CONTACT 5D WH O SPRING 4E RD2 CONTACT 5E RD2 O SPRING 6E RD2 E LUG VA3400 5 6V HP_OUT_VARISTOR_INNOCHIPS_1st VA3409 5 6V VA3408 5 6V VA3400 1 HP_OUT_VARISTOR_AMOTECH_2nd 5 6V VA3409 1 HP_OUT_VARISTOR_AMOTECH_2nd 5 6V VA3408 1 5 6V VA3410 5 6V COMP_VARISTOR_INNOCHIPS_1st VA341...

Page 29: ...6V OPT VA4001 OPT C4003 0 1uF OPT R4014 10K OPT EYE_SDA D4001 RCLAMP0502BA OPT WIFI_DM R4009 10K M_RFModule_RESET IR GND 3 4V_ST R4017 3 3K AR4003 10K AR4001 100 EYE_SENSOR P4001 12507WR H21L2B BK EAG64730701 1 2 3 4 5 6 7 8 12 13 14 15 16 17 18 19 20 21 22 IC4001 EAN64148901 TJ2242GSF6 3 EN 2 GND 4 FLAG 1 IN 6 OUT 5 ILIMIT R4001 2K 1 16W 5 BT_RESET R4006 2 2 WIFI_DM DP_2 2ohm R4007 2 2 WIFI_DM DP...

Page 30: ...0V C4303 10uF 10V C4309 10uF 10V C4307 10uF 10V JK4300 3AU04S 305 ZC LG Freeport_1st 1 2 3 4 5 5V_USB_1 R4304 10K OPT 5V_NORMAL USB_OCD1 3 3V_NORMAL C4310 0 1uF 16V USB_CTL1 R4306 4 7K JP4301 JP BLOCK USB VBUS DM DP GND ZD4301 5V USB_ESD_NXP_1st ZD4301 1 5V USB_ESD_KEC_2nd JK4300 1 SPG15 UCS 0203 SPG_2nd 1 2 3 4 5 JK4300 2 HONGLIN HONGLIN_3rd 1 2 3 4 5 IC4301 ROHM CO LTD 3 EN 2 GND 4 OC 1 VIN 6 VO...

Page 31: ...50V JK5000 RJ45VT 01SN002 UDE_1st 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 D5000 5 5V LAN_ESD EPHY_RDN EPHY_RDP EPHY_TDN EPHY_TDP D5003 5 5V LAN_ESD R5001 0 OPT R5002 0 OPT LANJACK GND LANJACK GND L5001 BLM15PX121SN1 L5002 BLM15PX121SN1 JK5000 1 26TM9G 30100 02HF Freeport_2nd 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 JK5000 2 B50 512 10 F4 03A A013 B52 HONGLIN_3rd 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 Ethernet...

Page 32: ...D_LRCK R5611 4 7K C5618 0 47uF 50V IC5600 NTP7515 NTP7515 3 NC_2 2 VDD_PLL 4 GND 1 NC_1 6 DVDD 5 NC_3 7 SDATA 8 WCK 9 NC_4 10 SDA 11 SCL 12 FAULT 13 MONITOR_0 14 MONITOR_1 15 MONITOR_2 16 BST2B 17 PGND2B 18 OUT2B 19 PVDD2B 20 PVDD2A 21 OUT2A 22 PGND2A 23 BST2A 24 VDR2 25 AGND 26 NC_5 27 VDR1 28 BST1B 29 PGND1B 30 OUT1B 31 PVDD1B 32 PVDD1A 33 OUT1A 34 PGND1A 35 BST1A 36 RESET 37 AD 38 CLK_I 39 GND_...

Page 33: ... 10K TU_N D_1 2V D_Demod_Core 0 1uF C6700 F_NIM MCP C6708 0 01uF 50V F_NIM MCP R6705 4 7K F_NIM MCP C6705 1uF 10V F_NIM MCP R6700 10K F_NIM MCP R6706 5 1K F_NIM MCP C6709 10uF 10V F_NIM MCP 5V_NORMAL 3 4V_ST C6511 10pF OPT C6510 10pF OPT R6503 1 0 IF_NON_FILTER R6502 1 0 IF_NON_FILTER FE_DEMOD1_TS_DATA_TU 4 FE_DEMOD1_TS_DATA 6 AR6500 0 1 16W TS_AR_0ohm AR6502 1 47 TS_AR_47ohm AR6501 1 47 TS_AR_47o...

Page 34: ... SCL_RF 2 SDA_RF 3 B1 3 3V_RF 4 CVBS 5 IF_AGC 6 SIF 7 IF N 8 IF P 9 GND 10 RESET_DEMOD 11 B2 3 3V_DEMOD 12 NC 13 B3 1 2V_DEMOD 14 ERROR 15 MCLK 16 SYNC 17 VALID 18 D0 19 D1 20 D2 21 D3 22 D4 23 D5 24 D6 25 D7 26 SHIELD FE_DEMOD1_TS_ERROR_TU FE_DEMOD1_TS_DATA_TU 1 TU_RESET1_TU IF_N_TU TDJS G301D TU6700 TU_AJ JA 6 SIF 7 IF N 8 IF P 9 SHIELD 1 SCL_RF 2 SDA_RF 3 B1 3 3V_RF 4 CVBS 5 IF_AGC FE_DEMOD1_TS...

Page 35: ... 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 TXA1P PANEL_VCC TXA1N TXA2N R7202 10K OPT TXB0P TXBCLKP TXA3N TXB3P R7204 3 3K OPT TXBCLKN L7200 UBW2012 121F OPT TXB1P 3 3V_NORMAL TXB3N TXACLKN TXB1N TXB0N R7203 10K OPT TXB2P TXA0P TXACLKP TXB2N TXA0N TXA3P TXA2P VCOM_SDA VCOM_SCL I2C_SDA1 AR7201 0 VCOM VCOM_SDA VCOM_SCL I2C_SCL1 R8118 2 2K R8119 1 8K AGP R8120 3 3K OPT AGP 3 3V_NORMAL R8121 3 3K OP...

Page 36: ... L14 NC_78 M1 NC_79 M2 NC_80 M3 NC_81 M7 NC_82 M8 NC_83 M9 NC_84 M10 NC_85 M11 NC_86 M12 NC_87 M13 NC_88 M14 NC_89 N1 NC_90 N3 NC_91 N6 NC_92 N7 NC_93 N8 NC_94 N9 NC_95 N10 NC_96 N11 NC_97 N12 NC_98 N13 NC_99 N14 NC_100 P1 NC_101 P2 NC_102 P8 NC_103 P9 NC_104 P11 NC_105 P12 NC_106 P13 NC_107 P14 EMMC_RST DAT7 AR8100 0 1 16W C8102 0 1uF 16V R8106 0 C8107 10pF 50V OPT C8103 2 2uF 10V OPT C8104 2 2uF...

Page 37: ...S232C C11202 0 1uF RS232C 3 4V_ST VA11200 ADUC 20S 02 010L 20V OPT C11201 0 1uF RS232C RIN1 VA11201 20V ADUC 20S 02 010L OPT SOC_TX SOC_RX IC11200 MAX3232CDR EAN41348201 RS232C 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 C11203 0 1uF RS232C JP11204 JP11203 JP11201 JP11202 AR11201 100 RS 232C Control INTERFACE 16Y_M2 2015 09 02 112 RS23...

Page 38: ......

Page 39: ...32LH55 Trouble shooting guide 2016 01 29 TV Product Development Depa rtment team 3 ...

Page 40: ...r 6 6 B Power error No power 7 7 Off when on off while viewing power auto on off 8 8 C Audio error No audio Normal video 9 9 Wrecked audio discontinuation noise 10 10 D Function error Remote control Local switch checking 11 11 External device recognition error 12 12 E Noise Circuit noise mechanical noise 13 13 F Exterior error Exterior defect 14 First of all Check whether there is SVC Bulletin in ...

Page 41: ...record S W Version and White Balance value before replacing the Main Board Replace Main Board Re enter White Balance value Precaution A4 A1 A2 A3 A6 First of all Check whether all of cables between board is inserted properly or not Main B D Adaptor LVDS Cable Speaker Cable IR B D Cable Normal Audio On Y N Normal Voltage Normal Voltage Y N Y N LCD TV Error Symptom A Video Error Established date 201...

Page 42: ...ptor No video No audio Replace Main B D or Repair parts Replace Adaptor Normal Voltage Y N LCD TV Error Symptom A Video Error Established date 2016 01 29 2 14 Content No video No audio Revised date Standard Repair Process A13 ...

Page 43: ...ng Digital signal level meter By using Diagnostics Setting on OSD Setting Customer Support red button on remote control Signal Test Signal strength Normal over 50 Signal quality Normal over 50 Y Contact with signal distributor or broadcaster Cable or Air N N Y N A6 End Normal Signal Normal Picture Normal Picture Normal Picture SVC Bulletin End End Normal Picture LCD TV Error Symptom A Video Error ...

Page 44: ...g match with installed ANT N Y N A6 Check satellite setting Check LNB frequency Check satellite Check Satellite connection DiSEqC motor etc Contact with signal distributor or broadcaster Ca ble or Air N Check Tuner soldering Replace Main B D Normal Picture Normal Picture Normal Setting SVC Bulletin Normal Signal End End LCD TV Error Symptom A Video Error Established date 2016 01 29 4 14 Content Tu...

Page 45: ...AV HDMI Y Check external device and cable Replace Main B D N A7 N Y Replace module Request repair f or external devi ce cable Check Test pattern A10 A8 A9 End Color error Color error External device Cable Normal External Input Compon ent HD MI error LCD TV Error Symptom A Video Error Established date 2016 01 29 5 14 Content Color error Revised date Standard Repair Process ...

Page 46: ...nnectin g Jig pattern Generator S et top Box etc N Y Replace Main B D Check screen co ndition by input External Input Component AV HDMI Request repair for ex ternal device Check S W Version Y N S W Upgrade Y N Y N Replace Main B D Replace Module A7 A8 A9 Check Test pattern N End Screen normal Screen normal Screen normal Screen normal Screen normal End End Check Version Normal Screen External Input...

Page 47: ...nserted properly Check Power LED Replace M ain B D N Y Check ST BY 3 5V N Replace Adaptor or R eplace Main B D Y A11 A16 Stand By Red Power LED On Normal Voltage Normal Operati on LCD TV Error Symptom B Power Error Established date 2016 01 29 7 14 Content No power Revised date Standard Repair Process End ...

Page 48: ...POWEROFF_RS232C Power off by RS232C POWEROFF_RESREC Power off by Reservated Record POWEROFF_RECEND Power off by End of Recording POWEROFF_SWDOWN Power off by S W Download POWEROFF_UNKNOWN Power off by unknown status except listed case Abnormal POWEROFF_ABNORMAL1 Power off by abnormal status except CPU trouble POWEROFF_CPUABNORMAL Power off by CPU Abnormal Please refer to the all cases which can be...

Page 49: ... m Main Spe aker Cable N Y Insert wafer SPK Cable Replace Speaker or Main B D Connec tion LCD TV Error Symptom C Audio Error Established date 2016 01 29 9 14 Content No audio Normal video Revised date Standard Repair Process A15 Normal Audio End Y N ...

Page 50: ... Input signal err or Check and fix ext ernal device Replace Main B D N A13 End Signal Normal Normal Voltage Normal Audio Wrecked Audio Discontinuation Noise for all audio Wrecked Audio Discontinuation Noise only for D TV Wrecked Audio Discontinuation Noise only for Analog Wrecked Audio Discontinuation Noise only for Ex ternal Input N Replace Main B D LCD TV Error Symptom C Audio Error Established ...

Page 51: ... Cable connection Connector solder Check 3 5V On Main B D A16 N N Check Voltage 19V of Adaptor A13 Check IR Output signal N Y Replace IR B D N A16 Replace Main B D Y A16 End Normal Operating Normal Voltage Normal Signal Normal Operating Normal Operating End Y LCD TV Error Symptom D Function Error Established date 2016 01 29 11 14 Content Remote control Local switch checking Revised date Standard R...

Page 52: ... Content Wi fi checking Revised date Standard Repair Process 3 Wifi operating error Check INSTART menu Wi Fi Mac NG Y Check RF Cable Connection N Check voltage 3 4V ST 1pin Replace Wi fi modu le Normal Voltage Close Y Y N Replace Main B D Wi Fi Mac NG N Close A15 A4 A4 A15 ...

Page 53: ... Replace Main B D Fix in accorda nce with tech nical informati on Signal Input Technical information External Input and Component Recognition error HDMI Recognition error LCD TV Error Symptom D Function Error Established date 2016 01 29 12 14 Content External device recognition error Revised date Standard Repair Process ...

Page 54: ...ceed as sho wn in the solution manual For models without any fix information provide the d escription or Mechanical noise is a natural phenomeno n and apply the 1st level description When the customer does not agree apply th e process by stage Describe the basis of the description in Part related to nose in the Owner s Manua l Circuit noise Mechanical noise LCD TV Error Symptom E Noise Established...

Page 55: ...ace cabinet Replace remote controller Replace stand Standard Repair Process Module damage Cabinet damage Remote Controller damage Stand damage LCD TV Error Symptom F Exterior Defect Established date 2016 01 29 14 14 Content Exterior defect Revised date ...

Page 56: ...or error LCD TV connection diagram A7 10 Check Link Cable LVDS reconnection condition A8 A9 11 Adjustment Test pattern ADJ Key A10 12 13 A Video error_Vertical Horizontal bar resid ual image light spot LCD TV connection diagram A8 14 Check Link Cable LVDS reconnection condition A8 A9 15 Adjustment Test pattern ADJ Key A10 16 Appendix Defected Type caused by T Con Inverter Module Exchange T Con Boa...

Page 57: ...error_Off when on off while viewi ng POWER OFF MODE checking method A14 28 C Audio error_No audio Normal video Checking method in Setting when there is no audi o A15 29 D Function error_ No response in remote c ontroller key error Remote controller operation checking method A16 Contents of LCD TV Standard Repair Process Detail Technical Manual First of all Check whether there is SVC Bulletin in GC...

Page 58: ...Process Detail Technical Manual Power On disjoint back case check lighting LCD TV Error Symptom A Video Error No Video Normal Audio Established date 2016 01 29 A1 Content Check Back Light On with Naked eye Revised date ...

Page 59: ...etail Technical Manual Measure DC Voltage applying to LED backlight from Main B D LCD TV Error Symptom A Video Error No Video Normal Audio Established date 2016 01 29 A2 Content Main Board to LED back light Voltage Revised date ...

Page 60: ...After recording the R G B GAIN Cut value of Color Temp Cool Medium Warm re enter the value after replacing the MAIN BOARD Standard Repair Process Detail Technical Manual LCD TV Error Symptom A Video Error No Video Normal Audio Established date 2016 01 29 A3 Content Check White Balance value Revised date ...

Page 61: ...Detail Technical Manual Check LVDS Voltage 12V LCD TV Error Symptom A Video Error No Video Normal Audio Established date 2016 01 29 A4 Content Power Voltage Measuring Method Revised date HD Model 27 30 pin FHD Model 48 51 pin ...

Page 62: ...the signal is strong use the attenu ator 10dB 15dB 20dB etc Standard Repair Process Detail Technical Manual LCD TV Error Symptom A Video Error Video lag stop Established date 2016 01 29 A5 Content Tuner Input Signal Strength Checking Method Revised date ...

Page 63: ... SW version method for remote controller for adjustment Press the IN START with the remote co ntroller for adjustment LCD TV Error Symptom A Video Error No Video Normal Audio Established date 2016 01 29 A6 Content LCD TV Version Checking Method Revised date ...

Page 64: ...connecting to the external input check the screen condition by signal Jack spec depending on Model LCD TV Error Symptom A Video Error Vertical Horizontal bar Residual Image Light spot Established date 2016 01 29 A7 Content LCD TV connection diagram Revised date ...

Page 65: ...heck LVDS connection condition Standard Repair Process Detail Technical Manual LCD TV Error Symptom A Video Error Color Error Established date 2016 01 29 A8 A9 Content Check and replace Link Cable LVDS and contact condition Revised date ...

Page 66: ... 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 LCD TV Error Symptom A Video Error Color Error Established date 2016 01 29 A10 Content Adjustment Test Pattern ADJ Key Revised date ...

Page 67: ...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 T Con Board 1 ...

Page 68: ...normal 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 T Con Board 2 ...

Page 69: ...Appendix Exchange the Module 1 Crosstalk Crosstalk Press damage Press damage Un repairable Cases In this case please exchange the module Press damage ...

Page 70: ...B 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 71: ...ess Detail Technical Manual ST BY condition Red Front LED control Setting Option Standby Light On Off LCD TV Error Symptom B Power Error No Power Established date 2016 01 29 A11 Content Check front Display LED Revised date ...

Page 72: ...d Repair Process Detail Technical Manual LCD TV Error Symptom B Power Error No Power Established date 2016 01 29 A12 A13 Content Checking Method When Power is ON Revised date Check Voltage 19V of Adaptor Power ...

Page 73: ...for adjustment 2 Check the entry into adjustment item 3 Standard Repair Process Detail Technical Manual LCD TV Error Symptom B Power Error Off when on off whiling viewing Established date 2016 01 29 A14 Content Power off Mode checking method Revised date ...

Page 74: ...Process Detail Technical Manual Sub Ass y Main Ass y LCD TV Error Symptom D Function Error No Response in remote controller Key error Established date 2016 01 29 A16 Content Remote controller operation checking method Revised date P4001 1 KEY1 KEY2 2 3 4V_ST 3 GND 4 LED_R 5 IR 6 GND 7 NC 8 NC IR ...

Page 75: ...o Normal Video Established date 2016 01 29 A15 Content Checking method in Setting when there is no audio Revised date Main Ass y P4001 1 3 4V_WIFI 2 WIFI_DM 3 WIFI_DP 4 GND 5 WOL WIFI_POWER_ON 6 GND 7 GND wifi 1 2 Check Wifi cable condition between wifi Main board 3 Check _3 4V_wifi Voltage ...

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