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LG 86UH5C Service Manual Download Page 24

Normal 

 voltage? 

Check various 
voltages of Power 
Board ( 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  

☞

A12 

Established 

date  

Revised date  

2/11 

2 

Error symptom 

Copyright ⓒ 2016 LG Electronics. Inc. All right reserved. 
Only for training and service purposes

LGE Internal Use Only

Summary of Contents for 86UH5C

Page 1: ...Internal Use Only P NO CHASSIS MODEL CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL SERVICE MANUAL MFL67237484 1604 REV00 86UH5C 86UH5C BF LW68E LG Digital Signage ...

Page 2: ...Electronics Inc All rights reserved Only for training and service purposes CONTENTS CONTENTS 2 PRECAUTION 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 ADJUSTMENT INSTRUCTION 10 BLOCK DIAGRAM 18 EXPLODED VIEW 19 TROUBLE SHOOTING GUIDE APPENDIX ...

Page 3: ...s of high humidity for a long time The module not be exposed to the direct sunlight Avoid contact with water as it may a short circuit within the module If the surface of panel become dirty please wipe it off with a softmaterial Cleaning with a dirty or rough cloth may damage the panel WARNING BE CAREFUL ELECTRIC SHOCK If you want to replace with the new backlight or inverter circuit must disconne...

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

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: ...andard Voltage of each products is marked by models 4 Specification and performance of each parts are followed each drawing and specification by part number in accord ance with BOM 5 The receiver must be operated for about 20 minutes prior to the adjustment No Item Specification Remarks 1 Supported Sync Type Digital 2 Operating Frequency Horizontal 30 83 kHz Vertical 23 71 Hz 3 Resolution Max HDMI...

Page 7: ...mat 8 bits RGB444 SD CARD 1 Spec version 2 0 USB 1 EMF DVIX HD For SVC Download USB3 0 Device Memory stick Mouse Key board Audio In 1 DVI Audio In L R Stereo 3P 3 5mm Phone Jack 2 Output DP 1 SST Support HDMI1 4 Audio Out 1 SE Stereo L R 0 5Vrms 3P 3 5mm Phone Jack 3 External Control RS232C IN OUT 1 1 UART Comm w IR Daisy Chain 4P 3 5mm Phone Jack IR Light Sen sor 1 External box type 5P 3 5mm Phon...

Page 8: ...280 48 112 248 1280 x 1024 O V Lines 60 02 1066 1024 1 3 38 6 H Pixels 148 50 67 5 2200 1920 88 44 88 1920 x 1080 O V Lines 60 1125 1080 4 5 46 7 H Pixels 297 0 67 5 4400 3840 176 88 296 3840 x 2160 HDMI1 2 3 DP V Lines 30 2250 2160 8 10 72 8 H Pixels 594 0 135 4400 3840 176 88 296 3840 x 2160 HDMI1 2 V Lines 60 2250 2160 8 10 72 4 2 HDMI DP OPS DTV Mode No Resolution H freq kHz V freq Hz Proposed...

Page 9: ...50 HDTV 1080P 50Hz O 4 1080 60P 67 5 60 HDTV 1080P 60Hz O 5 2160 30P 67 5 30 UD 2160P 30Hz HDMI1 2 3 DisplayPort PIP Main No Section Pol Dot Clock MHz Frequency kHz Hz Total Cycle E Display A Front Porch B Sync D Back Porch F Resolu tion Remarks 1 H Pixels 74 5 44 772 1664 1280 64 128 192 1280 x 720 O V Lines 59 855 748 720 3 5 20 2 H Pixels 148 50 67 5 2200 1920 88 44 88 1920 x 1080 O V Lines 60 ...

Page 10: ... image is displayed for a period of 20 min utes or longer especially where W B scale is strong Digital pattern 13ch and or Cross hatch pattern 09ch there can some afterimage in the black level area 3 Adjustment items 3 1 Main PCB check process Adjust RGB ADC EDID DDC download MAC Address Download Above adjustment items can be also performed in Final Assembly if needed Both Board level and Final as...

Page 11: ...EST 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 4 4 Serial number download Connect Bar Code scan equipment and set by RS 232C cable 1 E2PROM Data Write 2 E2PROM Data Read 4 5 WIFI MAC ADDRESS CHECK 4 5 1 Using RS232 Command Command Set ACK Transmission A l Set ID 20 Cr O K x or N G check the menu on in start 5 ...

Page 12: ...e to RS232C Gender EAD62707902 Accessory Cable You can control several products at one time by connecting them to a single PC 2 Check the RS232 command i RS232S Out Setting to PC Set device port COM check control panel on PC Set Baud Rate 115200 ii Run RS232C Command program ex W B adjust Program and Comm Test Program for RS232C Out Check iii After Running Rs232C Command ex W B adjust Check Data f...

Page 13: ... for training and service purposes 1 HDMI1 Check Sum 0x4A 0x46 HDMI 2 0 2 HDMI1 Check Sum 0xDB 0x2E HDMI 1 4 PIP Main 3 HDMI1 Check Sum 0xB0 0x1E PIP sub PBP 4 HDMI2 Check Sum 0x49 0x36 HDMI 2 0 5 HDMI2 Check Sum 0xDA 0x1E HDMI 1 4 PIP Main 6 HDMI2 Check Sum 0xAF 0x0E PIP sub PBP ...

Page 14: ...rights reserved Only for training and service purposes 7 HDMI3 Check Sum 0xD9 0x0E HDMI1 4 PIP Main 8 HDMI3 Check Sum 0xAE 0xFE PIP sub PBP 9 OPS Check Sum 0x69 0x82 10 DVI Check Sum 0x65 11 DP Check Sum 0xBE 0xD2 PIP main 12 DP Check Sum 0x97 0xB5 PIP sub PBP ...

Page 15: ... 2 2 Equipment 1 Color Analyzer CA 210 LED Module CH 14 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 5 2 3 Equipment connection MAP 5 2 4 Adj Command Protocol RS 232C Command used during auto adjustment RS 232C COMMAND CMD ID DATA Explantion wb 00 00 Begin...

Page 16: ...in utes In case of LCD Back light on should be checked using no signal or Full white pattern 5 2 6 Reference White balance Adj coordinate and color temperature Luminance 204 Gray Standard color coordinate and temperature using CS 1000 over 26 inch applied only LGD Module Mode Coordinate Temp uv x y Cool 0 271 0 270 13000K 0 0000 Medium 0 283 0 289 9300K 0 0000 Warm 0 313 0 329 6500K 0 0000 Standar...

Page 17: ... the Tool option next stage If downloading version is more high than your SIGNAGE SET have SIGNAGE SET can lost all channel data In this case you have to channel recover if all channel data is cleared you didn t have a DTV ATV test on production line After downloading have to adjust TOOL OPTION again 1 Push IN START key in service remote control 2 Select Tool Option 1 and Push OK button 3 Punch in...

Page 18: ... S e nsor V5 0 8GB PHY RTL8201 I2C I2C Thermal Sensor RTC EEPROM I2C I2C I2C MUX MDC MDIO H15A OPS A U DIO Analog L R X TAL 24MHZ X TAL 32 768KHz UTP URSA11 4K 60Hz Video 4K 120Hz with FRC MEMC Vx1 Vx1 IR Audio AMP NTP7515 Built in L R SPK I2S BTL 10W x 2ch 6ohm 75 86UH5C DDR3 DDR3 128MB X 2EA Separated OSD 4K 30Hz Video H D MI2 1 2 SPLITTER STDP4320 D V I H D MI3 D P 1 2a TMDS D P OUT RX 0 RX 2 R...

Page 19: ...al 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 Shock Fire or other Hazards Do not modify the original design without permission of manufacturer IMPORTANT SAF...

Page 20: ......

Page 21: ...TROUBLE SHOOTING GUIDE Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 22: ...er error No power 5 6 Off when on off while viewing power auto on off 6 7 C Function error Remote control Local switch checking 7 8 External device recognition error 8 9 WIFI operating checking 9 10 D Noise Circuit noise mechanical noise 10 11 E Exterior error Exterior defect 11 First of all Check whether there is SVC Bulletin in GCSC System for these model Copyright ⓒ 2016 LG Electronics Inc All ...

Page 23: ...arts 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 1 11 A Video error No video Normal audio A12 A1 A12 A3 A2 First of all Check whether all of cables between board is inserted properly or not Main B D Power B D Vx1 Cable Speaker Cable IR B D...

Page 24: ... and replace MAIN B D Y Replace Power Board and repair parts N End Standard Repair Process A Video error No video No audio A12 Established date Revised date 2 11 2 Error symptom Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 25: ...nal device and cable Y External device Cable normal HDMI DVI D DP error Check external device and cable Replace Main B D Replace Main B D N N A Video error Color error A4 N Y End Replace module Request repair for external device cable Color error Check Test pattern A6 A5 Standard Repair Process Established date Revised date 3 11 3 Error symptom Copyright ⓒ 2016 LG Electronics Inc All right reserve...

Page 26: ...nnecting Jig pattern Generator Set top Box etc N Y Replace Main B D Screen normal Check screen condition by input External Input Diplay Port DVI D HDMI DVI Request repair for external device Component error HDMI DVI D Diplay Port 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 Replace Ma...

Page 27: ...ower 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 Replace Power B D A12 A12 Standard Repair Process Established date Revised date 5 11 5 Error symptom Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 28: ...TROL 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 Reservated Record POWEROFF_RECEND Power off by End of Recording POWEROFF_SWDOWN Power off by S W Download POWEROFF_UNKNOWN Pow...

Page 29: ...ce Baterry of R C Check Repair Cable connection Connector solder Normal operating Check B 3 5V On Main B D A22 Normal Voltage Close N N Check 12V on Main B D Replace Power B D or Replace Main B D Power B D don t have problem A12 Check IR Output signal Normal Signal N Y Repair Replace IR B D N A22 Replace Main B D Y A22 Standard Repair Process Established date Revised date 7 11 7 Y Error symptom Co...

Page 30: ...x external device cable 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 8 11 Standard Repair Process 8 Error symptom Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 31: ...e connection N Check the Wifi wafer Standard Repair Process Established date Revised date 9 11 9 Change the Wifi assy Normal Voltage Close Y Y N Replace Main B D Wi Fi MAC value is NG N Close A24 A4 A4 A24 Error symptom Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 32: ...n the solution manual For models without any fix information provide the description 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 Part related to nose in the Owner s Manual E Noise Circuit noise mechanical noise Established date Revised date 10 11 Standard Repair Pro...

Page 33: ...ce remote controller Remote controller damage Stand dent Replace stand F Exterior defect Exterior defect Established date Revised date 11 11 Standard Repair Process 11 Error symptom Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 34: ...tal bar residual image light spot Connection diagram A4 5 A Video error_ Color error Check Link Cable Vx1 reconnection condition A5 6 Adjustment Test pattern ADJ Key A6 7 Appendix Defected Type caused by T Con Inverter Module Exchange Main Board 1 A 1 5 8 Exchange Main Board 2 A 2 5 9 Exchange Power Board PSU A 3 5 10 Exchange Module 1 A 4 5 11 Exchange Module 2 A 5 5 Continue to the next page Cop...

Page 35: ...Check power input Voltage ST BY 3 5V A12 13 B Power error_Off when on off while viewing POWER OFF MODE checking method A13 14 D Function error IR Cable operation checking method A14 Continued from previous page Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 36: ...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 locations A1 86UH5C Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 37: ... B GAIN Cut value of Color Temp Cool Medium Warm re enter the value after replacing the MAIN BOARD Entry method 1 Press the ADJ button on the remote controller for adjustment 2 Enter into White Balance of item 11 3 After recording the R G B GAIN Cut value of Color Temp Cool Medium Warm re enter the value after replacing the MAIN BOARD ALL MODELS Error symptom Content Copyright ⓒ 2016 LG Electronic...

Page 38: ...op 1 Checking method for remote controller for adjustment Press the IN START with the remote controller for adjustment Version ALL MODELS A3 Established date Revised date A3 Error symptom Content Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 39: ...zontal bar residual image light spot As the part connecting to the external input check the screen condition by signal A4 Established date Revised date A4 86UH5C Error symptom Content Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 40: ...ion A Video error_Color error Check the contact condition of the Link Cable especially dust or mis insertion A5 Established date Revised date A5 86UH5C Error symptom Content Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 41: ...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 A6 Established date Revised date A6 Error symptom Content Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 42: ...older 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 Main Board 1 A 1 5 Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 43: ...lder defect Short Crack Abnormal Power Section Solder defect Short Crack Fuse Open Abnormal power section Noise GRADATION GRADATION Abnormal Display Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 44: ...ix Exchange Power Board PSU No Light Dim Light Dim Light Dim Light No picture Sound Ok A 3 5 Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 45: ...s damage Crosstalk Crosstalk Press damage Panel Mura Light leakage Press damage A 4 5 Un repairable Cases In this case please exchange the module Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 46: ... 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 A 5 5 Un repairable Cases In this case please exchange the module Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 47: ...al Revised date A12 Check power input voltage B Power error _No power A12 Check the DC 20V 12V 15Y 적용 24Pin map PSU Error symptom Content P202 P203 Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 48: ...tem 3 Standard Repair Process Detail Technical Manual POWER OFF MODE checking method B Power error _Off when on off whiling viewing ALL MODELS A13 Established date Revised date A13 Error symptom Content Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

Page 49: ...ween IR Main board 2 Check the stand by 3 5V on the terminal M1 3 When checking the 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 JK6021 M7 GND M4 3 5V_ST M3 NC M1 IR M6 EYE_SCL M5 EYE_SDA JK6201 Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Us...

Page 50: ...T_DM 3 WIFI_BT_DP 4 GND 5 WOL WIFI_POWER_ON 6 GND 7 M_RFMODULE_RESET P6201 Error symptom Content Checking order 1 Check BT Wifi cable condition between BT Wifi assy Main board 2 Check the 3 5V on the terminal 2 Checking order to check motion remote wifi Copyright ⓒ 2016 LG Electronics Inc All right reserved Only for training and service purposes LGE Internal Use Only ...

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