LG M2794D Service Manual

Lcd monitor tv

Hide thumbs Also See for M2794D:

Owner's manual (102 pages)

Owner's manual (101 pages)

Owner's manual (90 pages)

Table Of Contents

Table of Contents

Quick Links

SERVICE MANUAL

CHASSIS : LA97A

MODEL : M2794D

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

P/NO : MFL49414529 (0906-REV00)

North/Latin America

Europe/Africa

Asia/Oceania

M2794D-PMJ

Internal Use Only

http://aic.lgservice.com

http://eic.lgservice.com

http://biz.lgservice.com

Printed in Korea

Table of Contents

Troubleshooting

Summary of Contents for LG M2794D

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 LCD MONITOR TV SERVICE MANUAL CHASSIS : LA97A MODEL : M2794D M2794D-PMJ CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL49414529 (0906-REV00) Printed in Korea...
Page 2: Table Of Contents
ADJUSTMENT INSTRUCTION ...............12 TROUBLE SHOOTING ................15 BLOCK DIAGRAM...................24 DESCRIPION OF BLOCK DIAGRAM .............25 EXPLODED VIEW .................. 26 SVC. SHEET ....................Copyright ©2009 LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes...
Page 3: Safety Precautions
An other abnormality exists that must be corrected before the receiver is returned to the customer. Copyright ©2009 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 ©2009 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only...
Page 5 CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Copyright ©2009 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
Page 6: Specification
50,000 HRS with 90% Confidence level Lamp Life 40,000 Hours (Min) Using Altitude 5,000 m (for Reliability) 3,000m(for FOS) Copyright ©2009 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
Page 7 -5~10degree Tilt force 1.0~3.7kgf Swivel Degree 358 degree Swivel Force 0.5 ~2.kgf Appearance General Refer to Standard of LG(55)G1-1020 Copyright ©2009 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
Page 8 0.268 0.298 0.328 - 6500K/ 9300K :Full White 100IRE *Use channel 13 of CA-210,because this model is WCG Panel. Copyright ©2009 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
Page 9 24.0 HDTV 1080P 1920* 1080 33.75 HDTV 1080P 1920* 1080 67.43 59.94 HDTV 1080P 1920* 1080 67.5 HDTV 1080P Copyright ©2009 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
Page 10 **: week ***: year ex) when year 2006 : input “10” **** : CHECK SUM (deferent along Serial No, week, year) Copyright ©2009 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
Page 11 10.2 EDID Data HDMI EDID - Product ID : 22205( HDMI1 and HDMI2 have the Same EDID) 1) HDMI 1 Copyright ©2009 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
Page 12 2) HDMI2 Adjustable Datas( Serial No, week, Year and Check sum) in HDMI EDID are same with RGB/ DVI Copyright ©2009 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
Page 13: Adjustment Instruction
*Manual ADC process using Service Remocon. After enter Service Mode by pushing “INSTART” key, execute “Auto- RGB” by pushing “ ” key at “Auto-RGB”. filexxx.bin Copyright ©2009 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
Page 14 MSPG Series Pattern 78 Y=0.305 X=0.313 Warm 6,500 K (216 Gray level, 85 IRE) MSPG Series Pattern 78 Y=0.329 Copyright ©2009 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
Page 15 0~7F Read 2-Page 80~FF Read 3-Page 0~7F Read 3-Page 80~FF Read *use: To read the appointment Address of E Copyright ©2009 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
Page 16: Troubleshooting
Check X101 Clock Replace X 101 12MHz Replace IC 106 Flash Memory Wave form of X101 Wave form of X101 Copyright ©2009 LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
Page 17 Check L VDS Cable for damage or ope n Replace Ca ble con ductors . Check L CD Module Control board (Refer to Module CAS) Copyright ©2009 LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
Page 18 Check L CD Module Control board Refer to Mo dule CAS Wave form of X400 Wave form of X400 Copyright ©2009 LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...
Page 19: Component Video Trouble Shooting
Wave form of Comp Pb Wave form of Comp Pr Wave form of C129 Wave form of C124 Wave form of C126 Copyright ©2009 LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
Page 20 Wave form of R673(Vsync) Wave form of R673(Vsync) Wave form of R105/C122 Wave form of R104/C121 Wave form of R119/C119 Copyright ©2009 LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...
Page 21 C137, C134, C135 C137, C134, C135 IC101 has problem Wave form of R625(S-video) Wave form of R611(CVBS) Wave form of R626(S-video) Copyright ©2009 LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...
Page 22: Hdmi Video Trouble Shooting
Check HD CP Key NVRAM (IC105) Replace IC105 Power & I2 C Sig nal (#5, #6) Replace Ms tar (IC101) Copyright ©2009 LG Electronics. Inc. All right reserved. - 22 - LGE Internal Use Only Only for training and service purposes...
Page 23 Replace IC 500 L502, L503, L504, L505 Check Sig nal from IC101 Replace IC 101 (R130, R131, R1021, R1022) Copyright ©2009 LG Electronics. Inc. All right reserved. - 23 - LGE Internal Use Only Only for training and service purposes...
Page 25: Descripion Of Block Diagram
3.Power Interface - Input 5V,12V from Power Board is converted to 3.3V,2.6V,1.8V,1.25V,1.2V by Regulator and DC/DC Converter Supply power to Module,Audio Amp and IC Copyright ©2009 LG Electronics. Inc. All right reserved. - 25 - LGE Internal Use Only Only for training and service purposes...
Page 26: 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. - 26 - LGE Internal Use Only Only for training and service purposes...

LG M2794D Service Manual

Quick Links

SERVICE MANUAL

Troubleshooting

Related Manuals for LG M2794D

Summary of Contents for LG M2794D

Table of Contents