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Copyright  ©2017 LG Electronics. Inc. All rights reserved.

 

LGE Internal Use Only

 

Only for training and service purposes

 

 

SERVICING PRECAUTIONS

 

 

CAUTION: Before servicing receivers covered by this service 
manual and its supplements and addenda, read and follow the 

SAFETY PRECAUTIONS 

on page 3 of this publication.

 

NOTE

: If unforeseen circumstances create conflict between the 

following servicing precautions and any of the safety precautions 
on page 3 of this publication, always follow the safety precau- 
tions. Remember: Safety First.

 

 

General Servicing Precautions

 

1. Always unplug the receiver AC power cord from the AC power 

source before;

 

a. Removing or reinstalling any component, circuit board 

module or any other receiver assembly.

 

b. Disconnecting or reconnecting any receiver electrical plug 

or other electrical connection.

 

c. Connecting a test substitute in parallel with an electrolytic 

capacitor in the receiver.

 

CAUTION: A wrong part substitution or incorrect polarity 
installation of electrolytic capacitors may result in an explo- 
sion hazard.

 

2. Test high voltage only by measuring it with an appropriate 

high voltage meter or other voltage measuring device (DVM, 
FETVOM, etc) equipped with a suitable high voltage probe. 
Do not test high voltage by "drawing an arc".

 

3. Do not spray chemicals on or near this receiver or any of its 

assemblies.

 

4. Unless specified otherwise in this service manual, clean 

electrical contacts only by applying the following mixture to the 
contacts with a pipe cleaner, cotton-tipped stick or comparable 
non-abrasive applicator; 10 % (by volume) Acetone and 90 % 
(by volume) isopropyl alcohol (90 % - 99 % strength) 
CAUTION: This is a flammable mixture.

 

Unless specified otherwise in this service manual, lubrication 
of contacts in not required.

 

5. Do not defeat any plug/socket B+ voltage interlocks with which 

receivers covered by this service manual might be equipped.

 

6. Do not apply AC power to this instrument and/or any of its 

electrical assemblies unless all solid-state device heat sinks 
are correctly installed.

 

7. Always connect the test receiver ground lead to the receiver 

chassis ground before connecting the test receiver positive 
lead.

 

Always remove the test receiver ground lead last.

 

8. Use with this receiver only the test fixtures specified in this 

service manual.

 

CAUTION: Do not connect the test fixture ground strap to any 
heat sink in this receiver.

 

 

Electrostatically Sensitive (ES) Devices

 

Some semiconductor (solid-state) devices can be damaged eas- 
ily by static electricity. Such components commonly are called 
Electrostatically Sensitive (ES) Devices. Examples of typical ES 
devices are integrated circuits and some field-effect transistors 
and semiconductor “chip” components. The following techniques 
should be used to help reduce the incidence of component dam- 
age caused by static by static electricity.

 

1. Immediately before handling any semiconductor component or 

semiconductor-equipped assembly, drain off any electrostatic 
charge on your body by touching a known earth ground. Alter- 
natively, obtain and wear a commercially available discharg- 
ing 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 buildup or expo- 
sure of the assembly.

 

3. Use only a grounded-tip soldering iron to solder or unsolder

 

ES devices.

 

4. Use only an anti-static type solder removal device. Some sol- 

der removal devices not classified as “anti-static” can generate 
electrical charges sufficient to damage ES devices.

 

5. Do not use freon-propelled chemicals. These can generate 

electrical charges sufficient to damage ES devices.

 

6. Do not remove a replacement ES device from its protective 

package until immediately before you are ready to install it. 
(Most replacement ES devices are packaged with leads elec- 
trically shorted together by conductive foam, aluminum foil or 
comparable conductive material).

 

7. Immediately before removing the protective material from the 

leads of a replacement ES device, touch the protective mate- 
rial to the chassis or circuit assembly into which the device will 
be installed.

 

CAUTION: Be sure no power is applied to the chassis or cir- 
cuit, and observe all other safety precautions.

 

8. Minimize bodily motions when handling unpackaged replace- 

ment ES devices. (Otherwise harmless motion such as the 
brushing together of your clothes fabric or the lifting  of your 
foot from a carpeted floor can generate static electricity suf- 
ficient to damage an ES device.)

 

 

General Soldering Guidelines

 

1. Use a grounded-tip, low-wattage soldering iron and appropri- 

ate tip size and shape that will maintain tip temperature within 
the range or 500 °F to 600 °F.

 

2. Use an appropriate gauge of RMA resin-core solder composed 

of 60 parts tin/40 parts lead.

 

3. Keep the soldering iron tip clean and well tinned.

 

4. Thoroughly clean the surfaces to be soldered. Use a mall wire- 

bristle (0.5 inch, or 1.25 cm) brush with a metal handle.

 

Do not use freon-propelled spray-on cleaners.

 

5. Use the following unsoldering technique

 

a. Allow the soldering iron tip to reach normal temperature. 

(500 °F to 600 °F)

 

b. Heat the component lead until the solder melts.

 

c. Quickly draw the melted solder with an anti-static, suction- 

type solder removal device or with solder braid.

 

CAUTION: Work quickly to avoid overheating the circuit 
board printed foil.

 

6. Use the following soldering technique.

 

a. Allow the soldering iron tip to reach a normal temperature

 

(500 °F to 600 °F)

 

b. First, hold the soldering iron tip and solder the strand 

against the component lead until the solder melts.

 

c. Quickly move the soldering iron tip to the junction of the 

component lead and the printed circuit foil, and hold it there 
only until the solder flows onto and around both the compo- 
nent lead and the foil.

 

CAUTION: Work quickly to avoid overheating the circuit 
board printed foil.

 

d. Closely inspect the solder area and remove any excess or 

splashed solder with a small wire-bristle brush.

 

Содержание 43LJ5000-UB

Страница 1: ...P NO MFL69920605 1612 REV00 CHASSIS MS3553 PB765 MODEL 43LJ5000 UB 43LJ500M UB CAUTION BEFORE SERVICING THE CHASSIS READ THE SAFETY PRECAUTIONS IN THIS MANUAL LED TV SERVICE MANUAL Internal Use Only ...

Страница 2: ... Use Only Only for training and service purposes CONTENTS CONTENTS 2 SAFETY PRECAUTIONS 3 SERVICING PRECAUTIONS 4 SPECIFICATION 6 SOFTWARE UPDATE PROCEDURE 8 BLOCK DIAGRAM 10 EXPLODED VIEW 12 DISASSEMBLE 13 TROUBLE SHOOTING GUIDE APPENDIX ADJUSTMENT INSTRUCTION APPENDIX ...

Страница 3: ... the cabinet such as antennas terminals etc to be sure the set is safe to operate without damage of electrical shock Leakage Current Cold Check Antenna Cold Check With the instrument AC plug removed from AC source connect an electrical jumper across the two AC plug prongs Place the AC switch in the on position connect one lead of ohm meter to the AC plug prongs tied together and touch other ohm me...

Страница 4: ...lectrostatic charge on your body by touching a known earth ground Alter natively obtain and wear a commercially available discharg ing 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...

Страница 5: ... the 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 repla...

Страница 6: ... parts are followed each drawing and specification by part number in accordance with BOM 5 The receiver must be operated for about 5 minutes prior to the adjustment 3 Test method 1 Performance LGE TV test method followed 2 Demanded other specification Safety CB IEC specification EMC CE IEC CISPR 4 Model General Specification No Item Specification Remarks 1 Receiving System NTSC M ATSC 2 Promramme ...

Страница 7: ... PC DVI 1 720 400 31 469 70 2 640 480 31 469 59 940 3 800 600 37 879 60 310 4 1024 768 48 363 60 000 5 1360 768 47 712 60 015 6 1920 1080 67 5 60 DTV 1 640 480p 31 47 59 94 2 640 480p 31 5 60 00 3 720 480p 31 47 59 94 4 720 480p 31 5 60 00 5 1280 720p 44 96 59 94 6 1280 720p 45 00 60 00 7 720 1440 480i 15 73 59 94 8 720 1440 480i 15 75 60 00 9 720 576p 31 25 50 00 10 1280 720p 37 5 50 00 11 720 14...

Страница 8: ...TE PROCEDURE 1 USB Upgrade 1 Place the higher version software in LG_DTV folder in USB root folder like this 2 Plug in USB disk then a notify OSD will be displayed if the software in LG_DTV higher than current software of TV set 3 Select YES button and press OK key if you want to update TV software the update OSD will be displayed ...

Страница 9: ...t will reboot after update success 2 AC ON In order to avoid the software which is on the mainboard can not work normal for current panel you can upgrade the correct software through AC ON 1 Copy the Software Bin to the U Disk root 2 Insert the U Disk to the mainboard USB Port 3 The AC on 4 Then the TV will upgrade and need to reboot after upgrade success Upgrading Red 1000ms Green 1000ms alternat...

Страница 10: ...QWHUQDO 8VH 2QO 2 5 0 0 1 0 2017 SYSTEM FUNCTION BLOCK DIAGRAM YPBPR CVBS Audio IN Optical MSD3553 HDMI1 HDMI2 NTSC ATSC I2C AGC VIF USB 2 0 LVDS miniLVDS SPI FLASH AMP TPA5733l L R I2S IR KEY DDR3 128MB ...

Страница 11: ...N51 M_SCL M_SDA 3V3_STB UT2 Si2159 Add_R RT1 RT2 0xC1 UD1 DC DC 2000mA MP9495 5V_STB 800mA eff 90 1730mA Add_W 0xC0 LVDS Add_R Add_W 1000mA VCC PANEL TAS5733L TBD U1 MSD3553 150mA U1 MSD3553 700mA D LDO UL1 VCC_DDR 230mA 230mApeaU k 1 MSD3553 120mAavg USB2 0 1000mA 500mA 8ohm 5W POW_EN POW_EN 800mA D LDO UL1 3V3_M 270mA 270mA UT2 Tuner 200mA U1 TAS5733 68mA UA1 TAS5733 Addr 0x56 ...

Страница 12: ...ese parts are identified by in the 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 2017 200 400 540 901 902 120 800 521 522 LV1 AR1 ARC1 500 12 ...

Страница 13: ... JTBTTFNCMF 3 1 1 After Screw Disassemble Total Screw 17pcs please remove B C from Module 2017 ...

Страница 14: ... 4 2 2 Remove all sort of connetcor 2017 ...

Страница 15: ... 5 3 3 Remove Power core IO cover Tape 2017 ...

Страница 16: ... 6 4 4 Screw and mainboard and tape disassembly 2017 ...

Страница 17: ... 7 5 5 tape disassembly 2017 ...

Страница 18: ... 8 6 6 Remove speaker versamount bracket screw 2017 ...

Страница 19: ... 9 7 7 Remove IR COVER tape 2017 ...

Страница 20: ...und A3 7 TV video error A4 1 8 HDMI YPbPr CVBS error A4 2 9 Power circuit diagram A5 10 Power supply Trouble 2 No power A6 11 Power supply for LED drive No backlight A7 12 Exchange T Con Board 1 Appendix 1 13 Exchange T Con Board 2 Appendix 2 14 Exchange Module itself 1 Appendix 3 15 Exchange Module itself 2 Appendix 4 16 Appendix ADJUSTMENT INSTRUCTION ADJUSTMENT Appendix 5 Function error Appendi...

Страница 21: ...V Error symptom A1 Power Supply Trouble No power 2016 12 31 LGE Internal Use Only ǃ 30 6 49 ǃ 1 1 30 6 41 30 A0 4 30 6 A0 9 30 0 4 30 A0 30 6 1 1 9 1 0 4 30 9 8 7 4 4 E 30 6 E 30 6 D 30 6 9 0 4 30 7 8 909 A0 9 30 6 1 1 0 4 30 9 8 7 4 4 E 30 6 A0 7C 9 4 4 E 30 6 2017 ...

Страница 22: ...e Blurred screen VWDEOLVKHG GDWH 5HYLVHG GDWH 1 79 UURU V PSWRP 6 12 31 LGE Internal Use Only ǃ 7 0 009 30 6 41 30 70 4 0 9 990 0 423 7C 30 6 41 30 907 4 3 920 30 70 1 907 3 920 907 30 6 41 30 4 4 1 8 30 5 6 4 9 8 7 1 A 0 0 8 20 0 4 34 4 4 2017 ...

Страница 23: ... Standard Repair Process Established date Revised date 3 11 LED TV Error symptom 2016 12 31 LGE Internal Use Only ǃ 34 0 009 30 6 41 30 7 20 1 907 A0 7C 4 9 8 7 0 09 9 907 30 6 30 4 4 1 30 6 429 7 1 8 3 920 30 907 30 70 907 3 920 2017 ...

Страница 24: ...ished date Revised date 4 11 LED TV Error symptom 2016 12 31 LGE Internal Use Only ǃ 7 6 009 30 6 41 0 4 9 8 7 30 6 41 30 9 7 4 4 0 A009 9 4 9 8 7 0 4 30 A0 7C 30 6 41 30 A0 7C 1 49 0 0 4 9 8 7 30 6 30 49 0 0 30 6 41 30 9 7 4 4 0 A009 9 4 9 8 7 0 4 30 4 4 3 920 2017 ...

Страница 25: ...ack screen VWDEOLVKHG GDWH 5HYLVHG GDWH 79 UURU V PSWRP 6WDQGDUG 5HSDLU 3URFHVV 6 12 31 5 LGE Internal Use Only ǃ 7 6 009 0 4 30 A0 4 4 30 6 41 30 A0 7C 1 49 0 0 4 9 8 7 30 6 30 49 0 0 30 6 41 30 9 7 4 4 0 A009 9 4 9 8 7 2017 ...

Страница 26: ...d date Revised date 6 1 LED TV Error symptom 201 LGE Internal Use Only ǃ 9 30 6 30 A0 30 6 30 A0 7C 4 4 30 6 41 1 30 34 7 20 4 9 8 7 30 6 30 9 7 4 4 30 6 30 49 429 7 30 6 30 4 4 1 8 30 5 6 30 6 30 429 7 30 6 30 4 4 1 8 30 6 30 4 4 0 A009 5 6 9 34 3 920 34 2017 ...

Страница 27: ... GDWH 5HYLVHG GDWH 1 79 UURU V PSWRP Standard Repair Process 6 12 31 LGE Internal Use Only 9F 0 3 9C 3 9907 9 4 0 ǃ 30 6 49 429 7 30 6 30 0 30 6 90 A0 30 6 A0 7C 4 4 30 6 41 A 6 30 6 4 4 30 6 429 7 30 6 90 9 0 4 30 7 8 909 30 6 30 4 4 1 8 90 2017 ...

Страница 28: ...I YPbPr CVBS error VWDEOLVKHG GDWH 5HYLVHG GDWH 1 79 UURU V PSWRP 6WDQGDUG 5HSDLU 3URFHVV 6 12 31 LGE Internal Use Only ǃ ǃ ǃ 30 6 30 429 7 30 5 6 30 6 30 0B 0 9 7 0 30 6 30 429 7 9 30 0 9 492 1 30 6 30 4 4 1 8 5 6 3 920 2017 ...

Страница 29: ...A5 Power circuit diagram VWDEOLVKHG GDWH 5HYLVHG GDWH 1 79 UURU V PSWRP Standard Repair Process 6 12 31 LGE Internal Use Only ǃ ǃ ǃ 2017 ...

Страница 30: ...A6 Power supply Trouble 2 No power Standard Repair Process VWDEOLVKHG GDWH 5HYLVHG GDWH 1 79 UURU V PSWRP 6 12 31 LGE Internal Use Only ǃ ǃ 2017 ...

Страница 31: ...A7 Power supply for LED drive No backlight Standard Repair Process VWDEOLVKHG GDWH 5HYLVHG GDWH 1 1 79 UURU V PSWRP 6 12 31 LGE Internal Use Only ǃ 2017 ...

Страница 32: ...NHQ 7 RQ HIHFW 17 URNHQ 6ROGHU GHIHFW 17 URNHQ 6ROGHU GHIHFW 17 URNHQ 6ROGHU GHIHFW 17 URNHQ 6ROGHU GHIHFW 17 URNHQ EQRUPDO 3RZHU 6HFWLRQ EQRUPDO 3RZHU 6HFWLRQ 6ROGHU GHIHFW 6KRUW UDFN SSHQGL FKDQJH 7 RQ RDUG LGE Internal Use Only Solder defect Short Crack 2017 ...

Страница 33: ...DO 3RZHU 6HFWLRQ 6ROGHU GHIHFW 6KRUW UDFN EQRUPDO 3RZHU 6HFWLRQ 6ROGHU GHIHFW 6KRUW UDFN XVH 2SHQ EQRUPDO SRZHU VHFWLRQ 1RLVH 5 7 21 EQRUPDO LVSOD SSHQGL FKDQJH 7 RQ RDUG LGE Internal Use Only GRADATION 2017 ...

Страница 34: ...Appendix Exchange the Module 1 Press damage Crosstalk Press damage Un repairable Cases In this case please exchange the module Crosstalk Press damage LGE Internal Use Only 2017 ...

Страница 35: ...WH 7 HIHFW 9HUWLFDO LQH 6RXUFH 7 HIHFW 9HUWLFDO ORFN 6RXUFH 7 HIHFW RUL RQWDO ORFN DWH 7 HIHFW RUL RQWDO OLQH DWH 7 HIHFW DWH 7 HIHFW RUL RQWDO ORFN DWH 7 HIHFW SSHQGL FKDQJH WKH 0RGXOH 8Q UHSDLUDEOH DVHV Q WKLV FDVH SOHDVH H FKDQJH WKH PRGXOH LGE Internal Use Only 2017 ...

Страница 36: ...ch 4 SOUND SETTING Change sound setting Don t touch 5 GENNERAL SETTING General setting 7 PANEL SETTING Change panel parameters Don t touch 8 EMC SETTING Some settings may affect EMC Don t touch 9 SYSTEM INFO System parameter 10 BOARD INIT Factory reset Don t touch 11 SW UPGRADE Software upgrade 13 LG SYSTEM INFO System parameter for LGE Detail 2 14 LG EZ ADJUST LG EZ adjust Detail 3 Bin Name the n...

Страница 37: ...Appendix ADJUSTMENT INSTRUCTION LGE Internal Use Only 2017 2 LG SYSTEM INFO LG SYSTEM INFO Display some system parameters no adjustable items ...

Страница 38: ...Appendix ADJUSTMENT INSTRUCTION LGE Internal Use Only 2017 3 LG EZ ADJUST Area Option Select Area USA Mexico Canada ...

Страница 39: ...Appendix ADJUSTMENT INSTRUCTION LGE Internal Use Only 2017 Output Operation Guide SHIPPING INIT Press Right key to execute TV initialization TV will be reset ...

Страница 40: ......

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