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LED TV
SERVICE MANUAL
CHASSIS :
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO :
MFL67234659 (1401-REV00)
LD41A
22/23/24MT55V
North/Latin America
Europe/Africa
Asia/Oceania
22/23/24MT55V-PZP
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea
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Summary of Contents for LG 22MT55V
- Page 1 Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LED TV SERVICE MANUAL CHASSIS : LD41A MODEL : 22/23/24MT55V 22/23/24MT55V-PZP CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL67234659 (1401-REV00) Printed in Korea...
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Page 2: Table Of Contents
ADJUSTMENT INSTRUCTION .............. 11 TROUBLE SHOOTING ................16 BLOCK DIAGRAM .................. 23 EXPLODED VIEW .................. 24 SCHEMATIC CIRCUIT DIAGRAM .............. Copyright © 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 © LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes... -
Page 4: Servicing Precautions
Copyright © LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes... - Page 5 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. Copyright © LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
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Page 6: Specification
1) Performance : LGE TV test method followed 2) Demanded other specification - Safety : CE,IEC specification - EMC : CE,IEC specification Copyright © LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes... - Page 7 *DVB-S/S2(Satellite model only support ) Digital TV 1) DVB-T/C/T2 Satellite Digital TV 1) DVB-T2/C/S/S2 Channel Storage ATV – 135EA, DTV – 1000EA Copyright © LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
- Page 8 CI : Switzerland, Austria, Slovenia, Hungary, Bulgaria CI+ : Switzerland(UPC,Cablecom), Netherland(Ziggo), Germany(KDG,CWB), Finland(labwise) DVB-S (Only 55V model) CI + : Germany (Astra HD+) Copyright © LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
- Page 9 HDTV 1080P 1920* 1080 56.250 148.5 HDTV 1080P 1920* 1080 67.43 / 67.5 59.94 / 60 148.35/ 148.50 HDTV 1080P Copyright © LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
- Page 10 1920* 1080 56.25 148.5 HDTV 1080P 1920* 1080 67.432 59.94 148.350 HDTV 1080P 1920* 1080 67.5 60.00 148.5 HDTV 1080P Copyright © LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
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Page 11: Adjustment Instruction
Use the speed under you didn’t have a DTV/ATV test on production line. 200KHz. Copyright © LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes... - Page 12 * Some models do not support RGB & PC audio in. It depends on model spec. → Caution : Not to push the INSTOP KEY after completion if the function inspection. Copyright © LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
- Page 13 7) Check whether the key was downloaded or not at ‘In Start’ menu. (Refer to below). 3.3.3. Check the Download to CI+ Key value in LG set. 1) Check the method of CI+ Key value a) Check the method on Instart menu Copyright ©...
- Page 14 4) Check the model name Instart menu → Factory name displayed (ex 24MT55D) 5) Check the Diagnostics (DTV country only) → Buyer model displayed (ex 24MT45D-PZP) Copyright © LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
- Page 15 2) Enter "White Balance" by pushing "►" key at "White Bal- ance". * When doing Adjustment, Please make circumstance as below. Copyright © LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
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Page 16: Trouble Shooting
Replace IC403 & Check IC403 Output Recheck Voltage Level (5V) Check X101 Clock Replace X101 24MHz Replace IC100 Flash Memory Copyright © LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes... - Page 17 P602 (#10, #11 ) Check FFC Cable for Damage or Replace Cable Open Conductors Replace T-Con Board or Module Copyright © LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
- Page 18 Replace IC401 & IC2600 Recheck 2. Check IC2600 Output voltage(1.2V) Check SCL/SDA Line(TU2600 #4, #5) Replace TU2600 or IC101 Copyright © LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...
- Page 19 Check JK800/801 for proper Replace Connector connection or Damage Check I2C Signal Re Download EDID Data (JK800/801) Replace Main Scaler (IC101) Copyright © LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
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Page 20: Block Diagram
BLOCK DIAGRAM Copyright © LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes... -
Page 21: 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. - 21 - LGE Internal Use Only Only for training and service purposes... - Page 22 2013/09/16 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR POWER THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 23 2013/05/23 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. IR/CONTROL/MODULE Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 24 2013/05/23 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR INTERFACE THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 25 2013/05/23 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR HDMI THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 26 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR LED DRIVER THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 27 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR M1_DDR (2DDR) THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 28 2013/05/23 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. PCMCI Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 29 2013/05/23 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR TUNER_EU_ERRC THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 30 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 31 2013/05/23 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. COMPONENT/SCART Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 32 FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR AMP_TAS5733/HP THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 33 2013/05/23 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MAIN1_NON_EU Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 34 2013/05/23 ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MAIN2_NON_EU Copyright ⓒ 2014 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...