LG M2250D Service Manual

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Owner's manual (108 pages)

Service manual (33 pages)

Owner's manual (106 pages)

SERVICE MANUAL

CHASSIS : LD11D

MODEL : M2250D

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

P/NO : MFL63642163(1112-REV00)

North/Latin America

Europe/Africa

Asia/Oceania

M2250D-PHM

Internal Use Only

http://aic.lgservice.com

http://eic.lgservice.com

http://biz.lgservice.com

Printed in Korea

Table of Contents

Summary of Contents for LG M2250D

Page 1: Service Manual
Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LED LCD TV SERVICE MANUAL CHASSIS : LD11D MODEL : M2250D M2250D-PHM CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL63642163(1112-REV00) Printed in Korea...
Page 2 CONTENTS ....................2 PRODUCT SAFETY ..................3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ..............9 BLOCK DIAGRAM...................15 EXPLODED VIEW .................. 16 SCHEMATIC CIRCUIT DIAGRAM............... - 2 - Copyright LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 3 CAUTION Please use only a plastic screwdriver to protect yourself from shock hazard during service operation. Copyright LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...
Page 4: 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 Copyright LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
Page 5 CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Copyright LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
Page 6: Specification
Luminance (cd/m2) Variation(%) 75 % Contrst Ratio 1000 Color Coordinates 0.641 0.333 Green 0.331 0.626 Blue 0.155 0.047 White 0.313 0.329 Copyright LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
Page 7 1152*864 54.34 60.05 1280*960 108.0 1280*1024 63.981 60.02 108.0 1680*1050 64.674 59.883 119.0 1680*1050 65.290 59.954 146.25 1920*1080 67.5 148.5 Copyright LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
Page 8: Hdmi Input
59.8 84.75 WXGA HDCP 1280*720 74.25 HDCP 1280*1024 63.981 60.02 108.875 SXGA HDCP/FHD model 1920*1080 67.5 148.5 WUXGA HDCP/FHD model Copyright LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
Page 9: Adjustment Instruction
3) Click “Read” tab, and then load download file (XXXX.bin) by clicking “Read” 4) Click “Connect” tab. If “Can’t” is displayed, check connection between computer, jig, and set. Copyright LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
Page 10 Tool option1 Tool option2 Tool option3 Tool option4 Tool option5 * Display and Sound check is executed by Remote control. 10024 8746 55337 26904 4) Completed selecting Tool option. Copyright LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
Page 11 • Check whether written EDID data is correct or not. * For SVC main Assembly, EDID have to be downloaded to Insert Process in advance. Copyright LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
Page 12: Edid Data
HDMI1 65030C001000 HDMI2 65030C002000 HDMI3 65030C003000 Item Condition Data(Hex) Manufacturer ID 1E6D Version Digital : 1 Revision Digital : 3 Copyright LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
Page 13 Confirm whether is normal or not when between power board’s ac block and GND is impacted on 1.5 kV(dc) or 2.2 kV(dc) for one second. Copyright LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
Page 14 Step4) At the Local Dimming mode, module Edge Backlight moving right to left Back light of module moving Step5) confirm the Local Dimming mode Step6) Press “Exit” key Copyright LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
Page 16: Exploded View
X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. Copyright LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
Page 30 Trouble Shooting Guide M22/2450D-PHM...
Page 31: Trouble Shooting
No audio/Normal video C. Audio error Wrecked audio/discontinuation/noise No response in remote controller, key error, recording error, memory error D. Function error External device recognition error E. Noise Circuit noise, mechanical noise F. Exterior error Exterior defect ⓒ LG Electronics. Inc.2011...
Page 32 Replace Inverter Normal or module voltage Repair Power Board or parts ※Precaution ☞A7 & A3 Always check & record S/W Version and White Replace Main Board Re-enter White Balance value Balance value before replacing the Main Board ⓒ LG Electronics. Inc.2011...
Page 33 LCD TV symptom No video/ No audio Revised date 2/13 ☞A4 Check various Check and voltages of Power Normal No Video/ replace Board voltage? No audio MAIN B/D ( 3.5V,12V,19V …) Replace Power Board and repair parts ⓒ LG Electronics. Inc.2011...
Page 34 Check RF Cable Check Normal Normal Connection Check Close Picture? S/W Version Bulletin? Picture? 1. Reconnection Tuner soldering S/W Upgrade Normal Contact with signal distributor Picture? or broadcaster (Cable or Air) Normal Replace Picture? Main B/D Close Close ⓒ LG Electronics. Inc.2011...
Page 35 External device external Check Test pattern Component /Cable Replace Main B/D device and error normal cable Request repair for external device/cable RGB/ Check external External device HDMI/DVI device and /Cable Replace Main B/D error cable normal ⓒ LG Electronics. Inc.2011...
Page 36 Request repair for external device Connect other external error Normal device and cable screen? Replace Screen (Check normal operation of normal? Main B/D External Input, Component, HDMI/ RGB and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc. ⓒ LG Electronics. Inc.2011...
Page 37 Check Power cord Replace Main B/D was inserted properly ☞A4 Measure voltage of each output of Power B/D Normal? ※ Normal Replace Main B/D voltage? Close Normal Check ST-BY 3.5V voltage? ☞A18 Replace Power B/D Replace Power ⓒ LG Electronics. Inc.2011...
Page 38 Power off by End of Recording "POWEROFF_SWDOWN" 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 ⓒ LG Electronics. Inc.2011...
Page 39 ☞A25 Check user Check audio B+ No audio Normal menu > 19V Power Board Screen normal voltage Speaker off Cancel OFF Replace Power Board and repair parts Check Disconnection Replace MAIN Board Speaker disconnection Replace Speaker ⓒ LG Electronics. Inc.2011...
Page 40 Replace Main B/D Wrecked audio/ cable/ANT provider Discontinuation/ Noise only for External Input (In case of External Input Connect and check Normal signal error) other external audio? Check and fix device external device Check and fix external device ⓒ LG Electronics. Inc.2011...
Page 41 When turn off light Baterry of R/C Replace Power B/D or in room Replace Main B/D (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 ⓒ LG Electronics. Inc.2011...
Page 42 Technical input Component Replace Main B/D input? information? - Fix information Recognition error signal - S/W Version RGB,HDMI/ Check and fix DVI, Optical Replace Main B/D Fix in external device/cable Recognition error accordance with technical information ⓒ LG Electronics. Inc.2011...
Page 43 ※ Describe the basis of the description (For models without any fix information, in “Part related to nose” in the Owner’s provide the description) Manual. ⓒ LG Electronics. Inc.2011...
Page 44 F. Exterior defect Error date LCD TV symptom Exterior defect Revised date 13/13 Zoom part with Module Replace module exterior damage damage Cabinet Replace cabinet damage Remote controller Replace remote controller damage Stand Replace stand dent ⓒ LG Electronics. Inc.2011...
Page 45 Adjustment Test pattern - ADJ Key Exchange LED driver Board (PSU) A-1/3 <Appendix> Defected Type caused by T-Con/ Inverter/ Exchange Module itself (1) A-2/3 Module Exchange Module itself (2) A-3/3 Continue to the next page ⓒ LG Electronics. Inc.2011...
Page 46 Voltage and speaker checking method when there is no audio C. Audio error_Wrecked Voltage and speaker checking method in case of audio/discontinuation audio error D. Function error_ No response in remote Remote controller operation checking method controller, key error ⓒ LG Electronics. Inc.2011...
Page 47 LCD TV Revised Content Check LCD back light with naked eye date <ALL MODELS> After turning on the power and disassembling the case, check with the naked eye, whether you can see light from 4 locations. ⓒ LG Electronics. Inc.2011...
Page 48 A. Video error_No video/Normal audio 2011.01.20 symptom date LCD TV Revised Content LED driver B+ 19V measuring method date Edge LED : LED Driver + main PCBA Check the DC 19V and Inverter on P901 PWM-DIM ERROR_OUT WLED_ENABLE ⓒ LG Electronics. Inc.2011...
Page 49 1. Press the ADJ button on the remote controller for adjustment. 2. Enter into White Balance of item 6. 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. ⓒ LG Electronics. Inc.2011...
Page 50 LCD TV Revised TUNER input signal strength checking method Content date <ALL MODELS> MENU red key (customer support signal test select channel When the signal is strong, use the attenuator (-10dB, -15dB, -20dB etc.) ⓒ LG Electronics. Inc.2011...
Page 51 A. Video error_Video error, video lag/stop symptom date LCD TV Revised LCD-TV Version checking method Content date <ALL MODELS> 1. Checking method for remote controller for adjustment Version Press the IN-START with the remote controller for adjustment ⓒ LG Electronics. Inc.2011...
Page 52 Standard Repair Process Detail Technical Manual Error A. Video error _Vertical/Horizontal bar, Established symptom date LCD TV residual image, light spot Revised Content LCD TV connection diagram (1) date ⓒ LG Electronics. Inc.2011...
Page 53 <ALL MODELS> Checking method: 1. Check the signal 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. ⓒ LG Electronics. Inc.2011...
Page 54 Standard Repair Process Detail Technical Manual Error Established A. Video error_Color error 2011.01.20 symptom date LCD TV Revised Content Check Link Cable (LVDS) reconnection condition date Check the contact condition of the Link Cable, especially dust or mis insertion. A10-1 ⓒ LG Electronics. Inc.2011...
Page 55 Adjustment Test pattern - ADJ Key Content date 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!) ⓒ LG Electronics. Inc.2011...
Page 56 Solder defect, CNT Broken T-Con Defect, CNT Broken 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 A - 1/5 ⓒ LG Electronics. Inc.2011...
Page 57 Appendix : Exchange T-Con Board (2) Abnormal Power Section Abnormal Power Section Solder defect, Short/Crack Abnormal Display Fuse Open, Abnormal power section Solder defect, Short/Crack Noise GRADATION GRADATION A - 2/5 ⓒ LG Electronics. Inc.2011...
Page 58 Appendix : Exchange PSU(LED driver) No Light Dim Light Dim Light Dim Light No picture/Sound Ok A - 3/5 ⓒ LG Electronics. Inc.2011...
Page 59 Appendix : Exchange the Module (1) 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 ⓒ LG Electronics. Inc.2011...
Page 60 Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect 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 ⓒ LG Electronics. Inc.2011...
Page 61 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power 2011.01.20 symptom date LCD TV Revised Content Check front display LED date Front LED control : Menu Option Power Indicator Standby light ON ⓒ LG Electronics. Inc.2011...
Page 62 Standard Repair Process Detail Technical Manual Error Established B. Power error _No power 2011. 1. 20 symptom date LCD TV Revised Check power input voltage and ST-BY 3.5V Content date Check 19V out of Adopter ⓒ LG Electronics. Inc.2011...
Page 63 _Off when on, off whiling viewing symptom date LCD TV Revised Content POWER OFF MODE checking method date <ALL MODELS> Entry method 1. Press the IN-START button of the remote controller for adjustment 2. Check the entry into adjustment item 3 ⓒ LG Electronics. Inc.2011...
Page 64 Checking method in menu when there is no audio date <ALL MODELS> Checking method 1. Press the MENU button on the remote controller 2. Select the AUDIO function of the Menu 3. Select TV Speaker from Off to On ⓒ LG Electronics. Inc.2011...
Page 65 3. Check signal input to the Audio amp IC. Such as below - MCLK ( master clock) : 12.288 MHz - RESET : normal status is high - VDD (Power) - LRCLK : 48KHz - SCLK : 3.072MHz ⓒ LG Electronics. Inc.2011...
Page 66 1, 2. Check IR cable condition between IR & Main board. 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. ⓒ LG Electronics. Inc.2011...

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M2250d-phm

LG M2250D Service Manual

Table of Contents

SERVICE MANUAL

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Summary of Contents for LG M2250D

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