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LG 49SM5KE Service Manual
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LG 49SM5KE Service Manual

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LG Digital Signage
SERVICE MANUAL
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO :
MFL70368891 (1807-REV00)
Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means),
publication, modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you
have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual.
The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service
Manual.
Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
LW82A
49SM5KE
CONFIDENTIAL
49SM5KE-BJ

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Summary of Contents for LG 49SM5KE

  • Page 1 Service Manual is STRICTLY PROHIBITED unless you have obtained the prior written consent of the LG Electronics entity from which you received this Service Manual. The material covered by this prohibition includes, without limitation, any text, graphics or logos in this Service Manual.
  • Page 2 SERVICING PRECAUTIONS ..............5 SPECIFICATION ..................7 SOFTWARE UPDATE ................10 BLOCK DIAGRAM .................. 11 EXPLODED VIEW .................. 12 TROUBLE SHOOTING GUIDE ..........APPENDIX - 2 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 3 (Cleaning with a dirty or rough cloth may damage the panel.) CAUTION Please use only a plastic screwdriver to protect yourself from shock hazard during service operation. - 3 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 4 Mettre au rebut les batteries usagées conformément aux instructions du fabricant. VORSICHT Explosionsgefahr bei unsachgemäßem Austausch der Batterie Entsorgung gebrauchter Batterien nach Anleitung - 4 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 5: Servicing Precautions

    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 - 5 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 6 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. - 6 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 7: Application Range

    30 - 83 kHz Operating Frequency Digital 56 - 60 Hz (DVI-D,OPS) Vertical 30Hz,56 - 60Hz (HDMI1/2,DP) 1920×1080 @ 60Hz(DVI/OPS) 3840x2160@30Hz(HDMI1/2/3,DP) Resolution Digital Recommend 1920×1080 @ 60Hz - 7 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 8 Wall Mount / Desk top Wall Mount Desk top 32/43: LSW230B 32/43:ST-432T 200*200 43/49/55:ST-432T 49/55: LSW350B 400*400 PIP / PBP Mode SSC (Split Screen) Mode - 8 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 9 HDTV 1080i 60Hz 1080/60i 56.25 HDTV 1080P 50Hz 1080/50P 67.432 59.94 HDTV 1080P 60Hz 1080/60P 67.5 HDTV 1080P 60Hz 1080/60P 67.5 UD 2160P 30Hz 2160/30P HDMI1/2/3/DP - 9 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 10: Software Update

    1) Push "IN-START" key in service remote control. 2) Select "Tool Option 1" and Push “OK” button. 3) Punch in the number. (Each model has their number.) - 10 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 11: Block Diagram

    BLOCK DIAGRAM - 11 - Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 12: 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. Copyright © LG Electronics Inc. All rights reserved. Only training and service purposes.

  • Page 13: Troubleshooting Guide

    TROUBLE SHOOTING GUIDE Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 14 E. Noise Circuit noise, mechanical noise F. Exterior error Exterior defect First of all, Check whether there is SVC Bulletin in GSCS System for these model. Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 15 ※Precaution ☞A5 & A3 Always check & record S/W Version and White Replace Main Board Re-enter White Balance value Balance value before replacing the Main Board Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 16 ☞A4 Check and Check various voltages Normal No Video/ replace of Power Board ( 13.2V) No audio voltage? MAIN B/D Replace Power Board and repair parts Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 17 -HDMI / RGB / DVI / DP error? Check external device Error only external /cable Replace Main B/D for specific device and input Normal? cable Request repair for external device/cable Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 18 Check ST-BY 3.5V at Main B/D voltage? Close And Power output voltage Normal (Power output voltage to Main B/D voltage? is 8.8V at ST-BY Status) Replace Power B/D ☞A10 Replace Power Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 19 Power off by S/W Download "POWEROFF_UNKNOWN" Power off by unknown status except listed case "POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble Abnormal "POWEROFF_CPUABNORMAL" Power off by CPU Abnormal Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 20 Power Board Screen normal voltage Speaker Out (Pin no. 7/8 Cancel OFF Replace Power Board and repair parts Check Speaker Replace MAIN Board Disconnection disconnection Replace Speaker Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 21 External Input (In case of External Input signal error) Connect and check Normal Check and fix other external device audio? external device Check and fix external device Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 22 Replace Main B/D in room (Power B/D don’t have problem) If R/C operate, Normal Close operating? Explain the customer cause is interference from light in room. Replace R/C Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 23 - Fix information signal - S/W Version HDMI/ RGB Check and fix DVI/DP, Optical Replace Main B/D Fix in external device/cable Recognition error accordance with technical information Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 24 ※ Describe the basis of the description in as shown in the solution manual “Part related to nose” in the Owner’s Manual. (For models without any fix information, provide the description) Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 25 Revised date 11/11 Zoom part Module Replace module damage with exterior damage Cabinet Replace cabinet damage Remote Replace remote control control damage Stand Replace stand dent Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 26 Adjustment Test pattern - ADJ Key Exchange LED driver Board (PSU) A-3/5 <Appendix> Defected Type caused by Main/ Inverter/ Exchange Module itself (1) A-4/5 Module Exchange Module itself (2) A-5/5 Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 27 Voltage and speaker checking method when C. Audio error_No audio/Normal video there is no audio D. Function error_ No response in remote Remote control operation checking method control, key error Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 28 <All MODELS> “A” After turning on the power and disassembling the case, check with the naked eye, whether you can see light from module holes. Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 29 1. Check the Voltage between LED+ / LED- 2. The Voltage spec is in Power B/D spec sheet 3. Refer to the Power B/D Spec sheet Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 30 2. Enter into White Balance of item 14. 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. Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 31 SMAW200-H12S5K(BK) PWR On PWM #2 D 13.2 V D 13.2 V D 13.2 V A 13.2 V A 13.2 V DRV On PWM #1 (Inverter –On) Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 32 Monitor Signage Version checking method Content date <ALL MODELS> 1. Checking method for remote control for adjustment Version Press the IN-START with the remote control for adjustment Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 33 Monitor Signage Revised Content Monitor signage connection diagram date [All Models] As the part connecting to the external input, check the screen condition by signal Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 34 A. Video error_Color error symptom date Monitor Signage Revised Content Check Link Cable reconnection condition date Check the contact condition of the Link Cable, especially dust or mis insertion. Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 35 You can view 8 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) Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 36 T-Con Defect, CNT Broken Abnormal Power Section Solder defect, CNT Broken Solder defect, CNT Broken T-Con Defect, CNT Broken Abnormal Power Section Solder defect, Short/Crack Solder defect, Short/Crack Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 37 Appendix : Exchange LVDS Cable or Main B/D (2) Abnormal Power Section Abnormal Power Section Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack GRADATION Noise GRADATION Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 38 Appendix : Exchange Power Board No Light Dim Light Dim Light Dim Light No picture/Sound Ok A - 3/5 Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 39 Panel Mura, Light leakage Panel Mura, Light leakage Press damage Crosstalk Press damage Crosstalk Un-repairable Cases In this case please exchange the module. Press damage A - 4/5 Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 40 Gate TAB IC Defect Un-repairable Cases In this case please exchange the module. Horizontal Block Gate TAB IC Defect Gate TAB IC Defect A - 5/5 Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 41 (Power Board ↔ Main Board) SMAW200-H12S5K(BK) PWR-On PWM#2 D 13.2 V D 13.2 V D 13.2 V A 13.2 V A 13.2 V DRV-On PWM#1 (Inverter –On) Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 42 (Power Board ↔ Main Board) SMAW200-H12S5K(BK) PWR-On PWM#2 D 13.2 V D 13.2 V D 13.2 V A 13.2 V A 13.2 V DRV-On PWM#1 (Inverter –On) Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 43 POWER OFF MODE checking method date <ALL MODELS> Entry method 1. Press the IN-START button of the remote control for adjustment 2. Check the entry into adjustment item 3 Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 44 ③ 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. Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
  • Page 45 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. Copyright ⓒ 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.

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