LG 32LM570B Schematic

CONFIDENTIAL

LED TV

SERVICE MANUAL

CHASSIS : LA94M

MODEL : 32LM570BPUA

CAUTION

BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

P/NO : MFL71388801 (1902-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.

CONTENTS

CONTENTS .............................................................................................. 2

SAFETY PRECAUTIONS ........................................................................ 3

SERVICING PRECAUTIONS ................................................................... 4

SPECIFICATION ....................................................................................... 6

SOFTWARE UPDATE ............................................................................ 10

BLOCK DIAGRAM ................................................................................. 12

EXPLODED VIEW .................................................................................. 13

ASSEMBLY GUIDE / DISASSEMBLY GUIDE ....................................... 15

TROUBLE SHOOTING GUIDE ................................................ APPENDIX

- 2 -

SAFETY PRECAUTIONS

IMPORTANT SAFETY NOTICE

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These 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.

General Guidance

An isolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal injury from electrical shocks.

It will also protect the receiver and it's components from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation.

If any fuse (or Fusible Resistor) in this TV receiver is blown, replace it with the specified.

When replacing a high wattage resistor (Oxide Metal Film Resistor, over 1 W), keep the resistor 10 mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Before returning the receiver to the customer,

always perform an AC leakage current check on the exposed metallic parts of 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-meter lead in turn to each exposed metallic parts such as antenna terminals, phone jacks, etc. If the exposed metallic part has a return path to the chassis, the measured resistance should be between 1 M When the exposed metal has no return path to the chassis the reading must be infinite. An other abnormality exists that must be corrected before the receiver is returned to the customer.

Ω and 5.2 MΩ.

Leakage Current Hot Check (See below Figure)

Plug the AC cord directly into the AC outlet.

Do not use a line Isolation Transformer during this check. Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor between a known good earth ground (Water Pipe, Conduit, etc.) and the exposed metallic parts. Measure the AC voltage across the resistor using AC voltmeter with 1000 ohms/volt or more sensitivity. Reverse plug the AC cord into the AC outlet and repeat AC voltage measurements for each exposed metallic part. Any voltage measured must not exceed 0.75 volt RMS which is corresponds to

0.5 mA. In case any measurement is out of the limits specified, there is possibility of shock hazard and the set must be checked and repaired before it is returned to the customer.

Leakage Current Hot Check circuit

- 3 -

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 conict between the

following servicing precautions and any of the safety precautions on page 3 of this publication, always follow the safety precautions. 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 mod-

ule 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 explosion 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 specied 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 ammable mixture. Unless specied 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 xtures specied in this

service manual.

CAUTION: Do not connect the test xture ground strap to any

heat sink in this receiver.

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES

devices are integrated circuits and some eld-effect transistors

and semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage 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. 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 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 exposure 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 solder

removal devices not classied as “anti-static” can generate electrical charges sufcient to damage ES devices.

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

electrical charges sufcient 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 electrically 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 material to the chassis or circuit assembly into which the device will be installed. CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your

foot from a carpeted oor can generate static electricity sufcient to damage an ES device.)

General Soldering Guidelines

1. Use a grounded-tip, low-wattage soldering iron and appropriate 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 wirebristle (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 ows onto and around both the component 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.

- 4 -

IC Remove/Replacement

Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent at against the circuit foil. When holes are the slotted type, the following technique should be used to remove and replace the IC. When working with boards using the familiar round hole, use the standard technique as outlined in paragraphs 5 and 6 above.

Removal

1. Desolder and straighten each IC lead in one operation by gently prying up on the lead with the soldering iron tip as the solder melts.

2. Draw away the melted solder with an anti-static suction-type solder removal device (or with solder braid) before removing the IC.

Replacement

1. Carefully insert the replacement IC in the circuit board.

2. Carefully bend each IC lead against the circuit foil pad and solder it.

3. Clean the soldered areas with a small wire-bristle brush. (It is not necessary to reapply acrylic coating to the areas).

"Small-Signal" Discrete Transistor Removal/Replacement

1. Remove the defective transistor by clipping its leads as close as possible to the component body.

2. Bend into a "U" shape the end of each of three leads remaining on the circuit board.

3. Bend into a "U" shape the replacement transistor leads.

4. Connect the replacement transistor leads to the corresponding leads extending from the circuit board and crimp the "U" with long nose pliers to insure metal to metal contact then solder each connection.

Power Output, Transistor Device Removal/Replacement

1. Heat and remove all solder from around the transistor leads.

2. Remove the heat sink mounting screw (if so equipped).

3. Carefully remove the transistor from the heat sink of the circuit board.

4. Insert new transistor in the circuit board.

5. Solder each transistor lead, and clip off excess lead.

6. Replace heat sink.

Diode Removal/Replacement

1. Remove defective diode by clipping its leads as close as possible to diode body.

2. Bend the two remaining leads perpendicular y to the circuit board.

3. Observing diode polarity, wrap each lead of the new diode around the corresponding lead on the circuit board.

4. Securely crimp each connection and solder it.

5. Inspect (on the circuit board copper side) the solder joints of the two "original" leads. If they are not shiny, reheat them and if necessary, apply additional solder.

3. Solder the connections. CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures.

Circuit Board Foil Repair

Excessive heat applied to the copper foil of any printed circuit board will weaken the adhesive that bonds the foil to the circuit board causing the foil to separate from or "lift-off" the board. The following guidelines and procedures should be followed whenever this condition is encountered.

At IC Connections

To repair a defective copper pattern at IC connections use the following procedure to install a jumper wire on the copper pattern side of the circuit board. (Use this technique only on IC connections).

1. Carefully remove the damaged copper pattern with a sharp knife. (Remove only as much copper as absolutely necessary).

2. carefully scratch away the solder resist and acrylic coating (if used) from the end of the remaining copper pattern.

3. Bend a small "U" in one end of a small gauge jumper wire and carefully crimp it around the IC pin. Solder the IC connection.

4. Route the jumper wire along the path of the out-away copper pattern and let it overlap the previously scraped end of the good copper pattern. Solder the overlapped area and clip off any excess jumper wire.

At Other Connections

Use the following technique to repair the defective copper pattern at connections other than IC Pins. This technique involves the installation of a jumper wire on the component side of the circuit board.

1. Remove the defective copper pattern with a sharp knife. Remove at least 1/4 inch of copper, to ensure that a hazardous condition will not exist if the jumper wire opens.

2. Trace along the copper pattern from both sides of the pattern break and locate the nearest component that is directly connected to the affected copper pattern.

3. Connect insulated 20-gauge jumper wire from the lead of the nearest component on one side of the pattern break to the lead of the nearest component on the other side. Carefully crimp and solder the connections. CAUTION: Be sure the insulated jumper wire is dressed so the it does not touch components or sharp edges.

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.

- 5 -

SPECIFICATION

NOTE : Specifications and others are subject to change without notice for improvement

.

1. Application range

This spec sheet is applied all of the LED TV with LA94M chassis

2. Test condition

Each part is tested as below without special notice.

(1) Temperature : 25 ºC ± 5 ºC, CST : 40 ºC±5 ºC (2) Relative Humidity: 65 % ± 10 % (3) Power Voltage

Standard input voltage (100~240V@ 50/60Hz) * Standard Voltage of each products is marked by models.

(4) Specification and performance of each parts are followed

each drawing and specification by part number in accordance with BOM.

(5) The receiver must be operated for about 20 minutes prior

to the adjustment.

3. Test method

(1) Performance: LGE TV test method followed (2) Demanded other specification

- Safety : CE, IEC specification

- EMC: CE, IEC

4. Electrical Specification

No Item Specication Remark

1 Market North America

2 Broadcasting system ATSC / NTSC-M, 64 & 256 QAM

3 Available Channel VHF : 02~13

UHF : 14~69

DTV : 02-69

CATV : 01~135

CADTV : 01~135

4 Receiving system Digital : ATSC, 64 & 256 QAM

Analog : NTSC-M

5 Video Input NTSC-M Rear (1EA)

6 Component Input Y/Cb/Cr, Y/ Pb/Pr Rear (1EA)

7 HDMI Input UHD HDMI 1 PC / DTV format Side, Support 6Gbps

HDMI 2 PC / DTV format Side, Support 6Gbps, Support ARC

HDMI 3 PC / DTV format Rear, Support 6Gbps

HDMI 4 PC / DTV format Rear, Support 6Gbps

FHD HDMI 1 PC / DTV format Side, Support 3Gbps, Support ARC

HDMI 2 PC / DTV format Rear, Support 3Gbps

HDMI 3 PC / DTV format Rear, Support 3Gbps

8 Audio Input AV Audio / DVI Audio AV and DVI use same jack ;

9 SPDIF out(1EA) Optical Audio out Rear (1EA),

10 HeadPhone HeadPhone out

11 USB Input EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD

- 6 -

5. External Input Support Format

5.1. HDMI Input (PC/DTV)

No. Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Proposed Remarks

PC

1 640*350 31.46 70.09 25.17 EGA

2 720*400 31.46 70.08 28.32 DOS

3 640*480 31.46 59.94 25.17 VESA(VGA)

4 800*600 37.87 60.31 40 VESA(SVGA)

5 1024*768 48.36 60 65 VESA(XGA)

6 1360*768 47.71 60.01 84.75 VESA(WXGA)

7 1152*864 54.34 60.05 80 VESA

8 1280*1024 63.98 60.02 109 SXGA Support to HDMI-PC

9 1920*1080 67.5 60 158.4 WUXGA(Reduced

Blanking)

10 1920*1080 135 120 297

11 3840*2160 54 24 297 UDTV 2160P

12 3840*2160 56.25 25 297 UDTV 2160P

13 3840*2160 67.5 30 297 UDTV 2160P

14 3840*2160 112.5 50 594 UDTV 2160P

15 3840*2160 135 60 594 UDTV 2160P

16 3840*2160 225 100 1188 UDTV 2160P

17 3840*2160 270 120 1188 UDTV 2160P

18 4096*2160 53.95 23.97 296.7 UDTV 2160P

19 4096*2160 54 24 297 UDTV 2160P

20 4096*2160 56.25 25 297 UDTV 2160P

21 4096*2160 67.5 30 297 UDTV 2160P

22 4096*2160 112.5 50 594 UDTV 2160P

23 4096*2160 135 60 594 UDTV 2160P

24 4096*2160 225 100 1188 UDTV 2160P

25 4096*2160 270 120 1188 UDTV 2160P

26 2560*1440 88.78 60 241.5 3K

27 2560*1440 183 120 497.7 3K

28 7680*4320 107.89 23.98 1188 8K 8K Model Only

29 7680*4320 108 24 1188 8K 8K Model Only

30 7680*4320 110 25 1188 8K 8K Model Only

31 7680*4320 131.87 29.97 1188 8K 8K Model Only

32 7680*4320 132 30 1188 8K 8K Model Only

33 7680*4320 220 50 2376 8K 8K Model Only

34 7680*4320 263.74 59.94 2376 8K 8K Model Only

35 7680*4320 264 60 2376 8K 8K Model Only

- 7 -

No. Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Proposed Remarks

DTV

1 640*480 31.46 59.94 25.12 SDTV 480P

2 640*480 31.5 60 25.12 SDTV 480P

3 720*480 15.73 59.94 13.5 SDTV, DVD

480I(525I)

4 720*480 15.75 60 13.51 SDTV, DVD

480I(525I)

5 720*576 15.62 50 13.5 SDTV, DVD

576I(625I) 50Hz

6 720*480 31.47 59.94 27 SDTV 480P

7 720*480 31.5 60 27.02 SDTV 480P

8 720*576 31.25 50 27 SDTV 576P

9 1280*720 44.96 59.94 74.17 HDTV 720P

10 1280*720 45 60 74.25 HDTV 720P

11 1280*720 37.5 50 74.25 HDTV 720P

12 1920*1080 28.12 50 74.25 HDTV 1080I

13 1920*1080 33.72 59.94 74.17 HDTV 1080I

14 1920*1080 33.75 60 74.25 HDTV 1080I

15 1920*1080 26.97 23.97 63.29 HDTV 1080P

16 1920*1080 27 24 63.36 HDTV 1080P

17 1920*1080 33.71 29.97 79.12 HDTV 1080P

18 1920*1080 33.75 30 79.2 HDTV 1080P

19 1920*1080 56.25 50 148.5 HDTV 1080P

20 1920*1080 67.43 59.94 148.35 HDTV 1080P

21 1920*1080 67.5 60 148.5 HDTV 1080P

22 1920*1080 112.5 100 297 HDTV 1080P

23 1920*1080 134.86 119.88 296.7 HDTV 1080P

24 1920*1080 135 120 297 HDTV 1080P

25 3840*2160 53.95 23.98 296.7 UDTV 2160P

26 3840*2160 54 24 297 UDTV 2160P

27 3840*2160 56.25 25 297 UDTV 2160P

28 3840*2160 61.43 29.97 296.7 UDTV 2160P

29 3840*2160 67.5 30 297 UDTV 2160P

30 3840*2160 112.5 50 594 UDTV 2160P When HDMI1,2,3,4

31 3840*2160 134.86 59.94 593.4 UDTV 2160P

32 3840*2160 135 60 594 UDTV 2160P

33 3840*2160 225 100 1188 UDTV 2160P

34 3840*2160 270 120 1188 UDTV 2160P

35 4096*2160 53.95 23.98 296.7 UDTV 2160P

36 4096*2160 54 24 297 UDTV 2160P

37 4096*2160 56.25 25 297 UDTV 2160P

38 4096*2160 61.43 29.97 296.7 UDTV 2160P

39 4096*2160 67.5 30 297 UDTV 2160P

Spec. out but display

UHD DEEP COLOUR

ON

- 8 -

No. Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Proposed Remarks

DTV

40 4096*2160 112.5 50 594 UDTV 2160P When HDMI1,2,3,4

41 4096*2160 134.86 59.94 593.4 UDTV 2160P

42 4096*2160 135 60 594 UDTV 2160P

UHD DEEP COLOUR

ON

43 4096*2160 225 100 1188 UDTV 2160P

44 4096*2160 270 120 1188 UDTV 2160P

45 2560*1440 88.78 60 241.5 3K non-standard

46 2560*1440 183 120 497.7 3K non-standard

47 7680*4320 107.89 23.98 1188 8K 8K Model Only

48 7680*4320 108 24 1188 8K 8K Model Only

49 7680*4320 110 25 1188 8K 8K Model Only

50 7680*4320 131.87 29.97 1188 8K 8K Model Only

51 7680*4320 132 30 1188 8K 8K Model Only

52 7680*4320 220 50 2376 8K 8K Model Only

53 7680*4320 263.74 59.94 2376 8K 8K Model Only

54 7680*4320 264 60 2376 8K 8K Model Only

5. External Input Support Format

5.2. Component Input

No. Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Proposed

1 720*480i 15.73 59.94 13.5 SDTV, DVD 480I(525I)

2 720*480i 15.75 60 13.514 SDTV, DVD 480I(525I)

3 720*576i 15.625 50 13.5 SDTV, DVD 576I(625I) 50Hz

4 720*480p 31.47 59.94 27 SDTV 480P

5 720*480p 31.5 60 27.027 SDTV 480P

6 720*576p 31.25 50 27 SDTV 576P 50Hz

7 1280*720 44.96 59.94 74.176 HDTV 720P

8 1280*720 45 60 74.25 HDTV 720P

9 1280*720 37.5 50 74.25 HDTV 720P 50Hz

10 1920*1080 28.125 50 74.25 HDTV 1080I 50Hz,

11 1920*1080 33.72 59.94 74.176 HDTV 1080I

12 1920*1080 33.75 60 74.25 HDTV 1080I

13 1920*1080 56.25 50 148.5 HDTV 1080P

14 1920*1080 67.43 59.94 148.5 HDTV 1080P

15 1920*1080 67.5 60 148.5 HDTV 1080P

- 9 -

SOFTWARE UPDATE

1. USB

(1) Insert the USB memory Stick to the USB port (2) Automatically detect the SW Version and show the below message

(3) Click [YES]: initiate the download and install of the update.

(4) Click [Check Now]: move to “About This TV” page for update (5) TV is updating

(6) After finished the update, below Pop-up appear

(7) Click [Yes] : TV will be DC OFF -> ON (8) After TV turned on, Check the updated SW Version and Tool Option

- 10 -

2. NSU

(This Function is needed to connect to the internet)

(Case 1) Allow Automatic Updates Toggle Item

(1) Menu -> All Settings -> General -> About This TV

(2) Silent Update_Pop-up When the download and install of the update is complete, the TV issues a Toast notification letting the user know that the update is complete and a reboot is required.

(3) If you want to see the update progress, go to [Menu -> All

Settings -> General -> About This TV]

(Case 2) NOT Allow Automatic Updates Toggle Item

(1) Menu -> All Settings -> General -> About This TV

(2) TV will automatically check for updates when every TV

boots When an updated is detected, the TV will issue an Alert letting the user know that an update is available.

(4) If you want to cancel update, click (1.1) CANCEL UPDATE

(5) [NO] : Keep updating [Yes] : Cancel updating

(3) [Yes] : Initiate the download and install of the update

[No] : Close the pop-up. The Alert will come back again when TV checks again.

(4) The following pop up window appears.

(5) [CHECK NOW] : Go to the About this TV setting page [CLOSE] : Close the pop-up

- 11 -

BLOCK DIAGRAM

Main IC

Audio AM P

Digital Demod

IF (+/-)

IR / KEY / Sensor

HDMI

MUX

LVDS

USB

SPDIF OUT

ETHERNET

USB1

OCP

1.5A

HDMI1

(ARC)

REAR

OPTIC

LAN

30P

X_TAL

24MHz

WIFI

SUB

ASSY

USB_WIFI

Tuner

HDMI2

SIDE

CVBS/YPbPr

AV/COMP

REAR

EEPROM (256Kb)

eMMC 5.1 (4GB)

I2S

I2C

Analog Demod

USB2

OCP

1.5A

HDMI3

CI Slot

P_TS

(LM57 OPT)

- 12 -

400

EXPLODED VIEW

IMPORTANT SAFETY NOTICE

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These 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.

200P

900

800

810

521

571

500

570

120

HW1

HS1

LV1

540

HP1

530

700

820

A10

ARC1

200A

AR1

- 13 -

EXPLODED VIEW(MODULE)

POL(Front) Panel

Ass’y

POL(Rear) Optical Sheet

Rear Side

200PPF

200PPR

200P

200PC 200SS

IMPORTANT NOTICE

MRC use only

* MRC : Module Repair Center

- 14 -

[Disassembly Guide]

2

1 1

1

3

ⓐ

ⓑ

ⓐ

ⓐⓐ

ⓐ

(1) Lay the TV Set on a flat.

(2) Remove Screw (1, 2, 3).

ASSEMBLY / DISASSEMBLY GUIDE

* Prohibition : Pull the upward on bottom side.

Please remove Screw and Latch rst. * SCREW TORQUE : 5 ~ 7Kgf.cm

(3) Remove the latch.

1) Hold the left bottom handle and lift the B/C. At the same time, gently pushing the push points.

And Lift the right direction repeatedly (Separate the B/C from bottom to top direction)

* If push with strong force from left side, Side Latch will break.

- 15 -

1) Without S tand

2) With Stand

43” Back Cover

32” Back Cover

Push

Pull

Latch

Pull

Hold

Step1) Left Side

Pull

Hold

Push

Pull

Latch

Step2) Right Side

- 16 -

(4) After holding the left/right bottom handle and lift the bottom of the B/C, push the B/C in the upward direction .

- Caution : Hook can be separated on the top position, don’t pull it hard for upward

- 17 -

[Assembly Guide]

49L K61 La tc h 20 P oints

• Press directio n

- Oblique direction from the outer surface

32LK61 La tc h 15 Point s

ⓐ

ⓑ

ⓐ

ⓐⓐ

ⓐ

2

1 1

1

3

ⓐ

ⓑ

ⓐ

ⓐⓐ

ⓐ

(1) Place the B/C on the module plate and Press Latch Points to assemble the B/C. (Assemble from bottom to top about B/C)

(2) Check whether gap occurs in the Top/left side/right side of the B/C

(3) Assemble the screws.

- 18 -

ASSEMBLY / DISASSEMBLY GUIDE (MODULE)

[Disassemble Guide]

(1) Disassemble back cover

* Loosen the screws (6ea) and uncover the back cover

(2) Disassemble the IR and Wi-fi bracket

(3) Detach the EMI tapes from the S-PCB

* The EMI tape (6ea) should be reused, therefore, attach them to the C/bottom as a right figure

(4) Disassemble the FFC cables from the S-PCB and

* Open the black connector shield first * Separate FFC cable from the connector

- 19 -

(5) Disassemble the S-PCBs from the holder

(6) Disassemble the case top

* Loosen the side screws – 14ea (upper - 5ea, L, R and bottom – 3ea for each) * Flip the whole module and disassemble the case top to the upper side

(7) Disassemble the panel

* Firstly, detach the EMI tape at left and right side of the guide panel

* Starting from the bottom side, raise up the panel carefully until it

stands vertically

* When you handle the panel, standing it vertically first and carrying

the panel is recommended

- 20 -

(8) Disassemble the guide panel

* Uncover latches on the guide panel with the thin and narrow tool (ex, a flat head screwdriver) * Be careful about fragile latches

(9) Disassemble the sheets and diffuser plate

* Uncover latches on the guide panel with thin and narrow tool (ex, a flat head screwdriver) * Be careful about fragile latches

(11) Disassemble the reflector sheet

* Be careful about damaging the reflector sheet

- 21 -

(12) Disassemble the LED array

* Press the connectors from the both side, at the same time, pull the connector up to the direction of the upper side * Detach the whole LED array bars

- 22 -

[Assemble Guide]

(1) Assemble the LED array

* Assemble the LED array and press LED Array to cover bottom

(2) Assemble the reflector sheet

* Assemble the reflector sheet according to the guide embossing * Assemble the reflector sheet bellow the lens with your fingers * Check the upper and lower side of sheet at corner and arrange it

according to the remarks

* Make sure that all the holes of sheet is fastened on the racks of

cover bottom

(3) Assemble the DP and sheet

- 23 -

(4) Assemble the guide panel

(5) Assemble the panel

* Arrange the upper left/right side first, and then, assemble the bottom left/right side of the panel

(6) Attach the EMI pad on the panel and guide panel

(7) Assemble the case top and flip the module

- 24 -

(8) Arrange the S-PCBs to the holders

(9) Connect FFC cable to the S-PCB

(10) Attach the EMI tape (6ea)

(11) Tighten the case top screw (14ea)

- 25 -

(12) Assemble the Wi-fi and RF bracket

(13) Assemble the back cover

* Tighten the screws (6ea) and cover the back cover

- 26 -

TROUBLE SHOOTING GUIDE

Contents of Standard Repair Process

No. Error symptom (High category) Error symptom (Mid category) Page Remarks

1

2 No video/No audio 2

3 Picture broken/ Freezing 3

4 Color error 4

5

6

7

8

9 Wrecked audio/discontinuation/noise 10

10

11

12

A. Video error

B. Power error

C. Audio error

D. Function error

No video/Normal audio 1

Vertical/Horizontal bar, residual image, light spot, external device color error

No power 6

Off when on, off while viewing, power auto on/off

No audio/Normal video 9

Remote control & Local switch checking

MR18 operating checking 12

Wifi operating checking 13

7,8

11

5

13 External device recognition error 14

14 E. Noise Circuit noise, mechanical noise 15

15 F. Exterior error Exterior defect 16

First of all, Check whether there is SVC Bulletin in GSCS System for these model.

Standard Repair Process

Error

symptom

A. Video error

No video/ Normal audio

Established

date

Revised date

First of all, Check whether all of cables between board is inserted properly or not.

(Main B/D↔ Power B/D, LVDS Cable, Speaker Cable, IR B/D Cable,,,)

☞A18 ☞A1

No video Normal audio

Normal

audio

N

Move to No video/No audio

Y

Check Back Light On with naked eye

☞A18

Check Power Board 13.2V output

On

Normal voltage

N

Repair Power Board or parts

Y N Check Power

Board

13.2V etc.

Y

Replace Inverter

or module

Normal

voltage

N

Repair Power Board or parts

End

Replace T-con/Main

Y

Board or module

1/16

※Precaution

Always check & record S/W Version and White Balance value before replacing the Main Board

☞A4 & A2

Replace Main Board

1

Re-enter White Balance value

Standard Repair Process

Error

symptom

No Video/ No audio

☞A18

Check various voltages of Power Board (13.2V…)

A. Video error

No video/ No audio

Normal

voltage?

Replace Power Board and repair parts

Y

N

Check and replace MAIN B/D

Established

date

Revised date

End

2/16

2

Standard Repair Process

☞ A3

Check RF Signal level

Normal Signal?

N

Check RF Cable

Connection

1. Reconnection

2. Install Booster

Normal

Picture?

Y

Close

Y

N

Error

symptom

A. Video error

Picture broken/ Freezing

Established

date

Revised date

. By using Digital signal level meter . By using Diagnostics menu on OSD

( Advanced→ Channels→ Channel Tuning→ Manual Tuning → Check the Signal )

- Signal strength (Normal : over 50%)

- Signal Quality (Normal: over 50%)

Check whether other equipments have problem or not.

(By connecting RF Cable at other equipment)

→ DVD Player ,Set-Top-Box, Different maker TV etc`

☞ A4

Normal

Picture?

Contact with signal distributor

or broadcaster (Cable or Air)

Y

S/W Version

N

Check

SVC

Bulletin?

S/W Upgrade

Normal

Picture?

Y

N

Y

N

Check

Tuner soldering

N

Replace

Main B/D

Y

3/16

Close

3

Standard Repair Process

☞A6

Check color by input

-External Input

-AV

-HDMI

☞A8

Check Test pattern

Error

symptom

Color

error?

Check error color input mode

☞ A7

※ Check

and replace

Y

Link Cable (LVDS Cable)

N

and contact condition

External Input/

Component

error

A. Video error

Color error

Color

error?

Check external device and cable

N

Y

Replace Main B/D

Established

date

Revised date

External device

/Cable

normal

N

Color

error?

End

Y

Replace module

N

Replace Main/T-con B/D

4/16

HDMI

error

Check external

device and cable

4

Request repair

for external

device/cable

N

External device

/Cable

normal

Y

Replace Main/T-con B/D

Standard Repair Process

Error

symptom

Vertical / Horizontal bar, residual image,

A. Video error

light spot, external device color error

Vertical/Horizontal bar, residual image, light spot

☞A6

Check color condition by input

-External Input

-HDMI

☞A8

Check Test pattern

Screen

normal?

N

Replace module

Y

Check external device connection condition

Normal?

N

Request repair

for external device

External device screen error-Color error

☞ A7

Check and

Y

replace Link Cable

Established

date

Revised date

Screen

normal?

End

N

Y

Replace Main/T-con B/D

For LGD panel

Replace Main B/D

For other panel

5/16

Replace Module

N

Screen

normal?

Y

End

Check S/W Version

Check

version

S/W Upgrade

Normal

screen?

End

N

Y

N

Y

Check screen condition by input

-External Input

-Component

-HDMI/DVI

External

Input

error

Component

error

HDMI/

DVI

5

Connect other external device and cable

(Check normal operation of External Input, Component, RGB and HDMI/DVI by connecting Jig, pattern Generator ,Set-top Box etc.

Connect other external device and cable

(Check normal operation of External Input, Component, RGB and HDMI/DVI by connecting Jig, pattern

Generator ,Set-top Box etc.

Screen

normal?

Request repair for external device

Screen

normal?

N

Y

N

Replace Main/T-con B/D

Replace Main /T-con B/D

Standard Repair Process

☞A17

Check LED

. Stand-By: Red or Turn On . Operating: Turn Off

Check Power cord was inserted properly

Error

symptom

Power LED

On?

N

Normal?

Y

Close

N

Y

B. Power error

Check ST-BY 3.5V

☞A18

No power

DC Power on by pressing Power Key On Remote control

Y

Normal

Y

voltage?

N

Established

date

Revised date

☞A18

Y

N

Check Power On ‘”High”

Replace Main B/D

Normal

operation?

☞A18

Measure voltage of each output of Power B/D

N

Y

Replace Main B/D

Normal

voltage?

Replace Power B/D

OK?

Y

6/16

Replace

Power B/D

Replace Power B/D

6

Standard Repair Process

Check outlet

Check A/C cord

Check for all 2- phase

power out

Error

symptom

Error?

Y

Fix A/C cord & Outlet and check each 2 phase out

B. Power error

Off when on, off while viewing, power auto on/off

☞A19

N

Check Power Off Mode

☞A18

(If Power Off mode

is not displayed)

Check Power B/D

voltage

※ Caution

Check and fix exterior of Power B/D Part

Abnormal

Established

date

Revised date

CPU

1

Normal

voltage?

Replace Power B/D

Y

N

Replace Main B/D

7/16

Normal?

Replace Power B/D

Y

N

End

7

Standard Repair Process

Error

symptom

Off when on, off while viewing, power auto on/off

B. Power error

* Please refer to the all cases which can be displayed on power off mode.

Power Off list Explanation Action contents

KEYTIMEOUT

1SEC Power OFF

ACDET

5V MNT

CPUABNORMAL If the CPU attempts to reset in case of abnormal operation and Shut Down in case of failure.

NO POLING

CPUCMD

INV_ERROR

ONRF_FAIL RESULT : Reboot, CONDITION : OLED module compensation is running but fails. Check & Change OLED Module

PNWASHFAIL Power off by panel noise wash function fail case. Check & Change OLED Module

RESET When Micom is reset by AC Off

KEY Power off by Local key

OFFTIMER Power off by Off timer

SLEEPTIMER Power off by sleep timer

NOSIG Power off by No Signal

FANSTOP Power off by FAN operation stopped

INSTOP Power off by Instop Key

AUTO OFF Power off by auto off function

RESREC Power off by reserved recording

RECEND Power off when recording stops

SWDOWN Reboot by SW down load function UNKNOWN COMP_END OLED threshold voltage degradation(Compensation) completes.

PNWASHDONE Power off by panel noise wash function complited. (OLED)

Power off when TV is not turned off during a certain time RESULT : micom force to trigger TV power off. CONDITION : When pressing power key while power on/off status, CPU does not response within 8 seconds

Almost the same as Power Off by KEYTIMEOUT. If there is no vaild communication Bet ween CPU and MICOM for more than 5 seconds, the MICOM switcheds off PSU and Records. Power off by 1SEC Power off. In this case, we don’t have information where the

malfunction exactly occurred. But in in indicates that CPU had stopped and rebooted.

In case of AC Off (It is normal when the power cord is unplugged.) Normal

If there are many ACDETs connected, Power Board is defective

Power off by unstable AC power detect. RESULT : micom check the stable power. CONDITION : When AC on or DC on, stabilization check routine (Power Detect High

Check) fail after multi power on.

Power off when receiving no ack. RESULT : TV power off/on (Reboot) CONDITION : There is no I2C response from CPU for 15 seconds.

Power off by main SoC command. Check & Change Main B/D Power off by module error (OLED)

CONDITION : OLED Module send signal to micom

No meaning (same as initial value)

Established

date

Revised date

8/16

Check & Change Main B/D

Check & Change Power B/D

Check & Change Main B/D

Check & Change OLED Module

Normal Case

8

Standard Repair Process

No audio Screen normal

Error

C. Audio error

symptom

No audio/ Normal video

☞A20 ☞A21+A18

Check user menu > Speaker off

Off

Y

Cancel OFF

Check audio

N

13.2V of Power Board

Established

date

Revised date

Normal voltage

Replace Power Board and repair parts

Y

N

9/16

Check Speaker disconnection

Disconnection

Y

Replace Speaker

9

N

Replace MAIN Board

End

Standard Repair Process

Check input signal

-RF

-External Input

signal

Error

symptom

C. Audio error

Wrecked audio/ discontinuation/noise

Established

date

Revised date

→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio

☞A21+A18

Check audio B+ Voltage (13.2V)

Normal

voltage?

N

Replace Power B/D

Replace Main B/D

N

Y

Signal

normal?

N

Y

(When RF signal is not received)

Request repair to external

cable/ANT provider

(In case of

External Input

signal error) Check and fix external device

Wrecked audio/

Discontinuation/

Noise for

all audio

Wrecked audio/

Discontinuation/

Noise only

for D-TV

Wrecked audio/

Discontinuation/

Noise only

for Analog

Wrecked audio/

Discontinuation/

Noise only

for External Input

Check and replace speaker and connector

Replace Main B/D

Connect and check other external device

Normal audio?

10/16

End

Check and fix external device

10

Standard Repair Process

Error

symptom

D. Function error

Remote control & Local switch checking

1. Remote control(R/C) operating error

☞A22

Check R/C itself

Operation

Check R/C Operating

When turn off light

in room

If R/C operate, Explain the customer cause is interference

from light in room.

operating?

Normal

Y

N

Check & Replace

Baterry of R/C

Normal

operating?

Replace R/C

Check & Repair

Cable connection

Connector solder

Y

Close

N

Normal

operating?

Y

Close

☞A22

N

Check B+3.5V

On Main B/D

Established

date

Revised date

☞A22

N

Y

Check IR

Output signal

Normal

Voltage?

☞A18

Check 13.2v on Power B/D

Replace Power B/D or

Replace Main B/D

(Power B/D don’t have problem)

11/16

Replace

Main B/D

Normal

Signal?

N

Repair/Replace

IR B/D

Y

11

Standard Repair Process

Error

symptom

D. Function error

MR18 operating checking

2. MR18(Magic Remocon) operating error

☞A4

Check the

INSTART menu

RF Receiver ver

is “00.00”?

☞A23

Check & Repair

Y

RF assy

connection

☞A4

RF Receiver ver

is “00.00”?

Y

N

Check MR18

itself Operation

N

Close

Normal

operating?

Check & Replace

Battery of MR18

Normal

operating?

Replace

MR18

Y

N

Y

N

Press the

wheel

Close

Established

date

Revised date

Is show ok

message?

Y

Close

Is show ok

message?

Close

Y

*Depending on country

Turn off/on the

N

set and press

the wheel

N

12/16

Press the back key about 5sec

Down load the Firmware

* INSTART MENU14.RF

Remocon Test3. Firmware

download

* If you conduct the loop at 3times, change the M4.

12

Standard Repair Process

Error

symptom

3.Wifi operating error

☞A4

Check the

INSTART menu

Wi-Fi Mac value

is “NG”?

☞A24

Check & Repair

Y

Wifi cable

connection

☞A4

Wi-Fi Mac value

is “NG”?

D. Function error

Wifi operating checking

☞A24

N

Check the Wifi wafer

N

Close

1pin

Established

Revised date

Normal

Voltage?

Y

Close

date

N

13/16

Replace

Main B/D

Change the Wifi

Y

assy

13

Standard Repair Process

Check input signal

Error

symptom

Signal

input?

Y

N

Check and fix

external device/cable

D. Function error

External device recognition error

Check technical information

- Fix information

- S/W Version

Technical

information?

Fix in

accordance

with technical

information

Y

External Input and

N

Component

Recognition error

HDMI/

DVI, Optical

Recognition error

Established

date

Revised date

14/16

Replace Main B/D

14

Standard Repair Process

Identify nose type

Error

symptom

Circuit

noise

Mechanical

noise

※ Mechanical noise is a natural phenomenon, and apply the 1st level description. When the customer does not agree, apply the process by stage. ※ Describe the basis of the description in “Part related to nose” in the Owner’s Manual.

Check location of noise

Circuit noise, mechanical noise

E. Noise

Replace PSU

OR

Established

date

Revised date

※ When the nose is severe, replace the module (For models with fix information, upgrade the S/W or provide the description)

※ If there is a “Tak Tak” noise from the cabinet, refer to the KMS fix information and then proceed as shown in the solution manual (For models without any fix information, provide the description)

15/16

15

Standard Repair Process

Error

symptom

Zoom part with exterior damage

Module

damage

Cabinet

damage

Remote

control

damage

F. Exterior defect

Exterior defect

Replace module

Replace cabinet

Replace remote control

Established

date

Revised date

16/16

Stand

dent

Replace stand

16

Contents of Standard Repair Process Detail Technical Manual

No. Error symptom Content Page Remarks

1

A. Video error_ No video/Normal audio

2 Check White Balance value A2

3

A. Video error_ video error /Video lag/stop

4 Version checking method A4

5 Tuner Checking Part A5

A. Video error _Vertical/Horizontal bar,

6

residual image, light spot

7 A. Video error_ Color error

8

Defected Type caused by T-Con/ Inverter/ Module

Check LVDS Lock A1

TUNER input signal strength checking method

Connection diagram A6

Check Link Cable (LVDS) reconnection condition

Check Cable (1) ~ (2)

Exchange Main Board (1) ~ (3) A-3/11 ~ A-5/11

Exchange Module (1) ~ (3) A-6/11 ~ A-8/11

Exchange T-Con (1) ~ (2) A-9/11 ~ A-10/11

A3

A7

A-1/11 A-2/11

Exchange Power Board(PSU) A-11/11

Continue to the next page

Contents of Standard Repair Process Detail Technical Manual

Continued from previous page

No. Error symptom Content Page Remarks

10

B. Power error_ No power

11 Check power input Voltage & ST-BY 3.5V A9

12

13

14

15

16 Motion Remote operation checking method A14

17

18 Check items after Main B/D replacement A18

19 Adjustment Test pattern – ADJ Key A19

B. Power error_Off (when on/off, while viewing)

C. Audio error_ No audio/Normal video

D. Function error

E. Etc

Check front display LED A8

POWER OFF MODE checking method A10

Checking method in menu when there is no audio A11

Voltage and speaker checking method when there is no audio

Remote control operation checking method A13

How to use the Service remote control A15-A17

A12

20

How to use JIG (Power B/D Diagnostic Smart Jig Multi Gender

A20

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error_No video/Normal audio

Check LVDS

Established

date

Revised

date

A1

No Video/Normal audio

C2333: 13V (Normal)

Reassemble

After turning on the power and disassembling the case, check C2333 Voltage 13V

A1

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error_No video/Normal audio

Check White Balance value

Established

date

Revised

date

A2

Entry method

1. Press the ADJ button on the remote control for adjustment.

2. Enter into White Balance.

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.

A2

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error_Video error, video lag/stop

TUNER input signal strength checking method

All Settings Programmes Programme Tuning&Settings  Manual Tuning

Established

date

Revised

date

A3

When the signal is strong,

use the attenuator

(-10dB, -15dB, -20dB etc.)

A3

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error_Video error, video lag/stop

Version checking method

Established

date

Revised

date

A4

1. Checking method for remote control for adjustment

Version

Press the IN-START with the remote control for adjustment

A4

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error_Video error, video lag/stop

TUNER checking part

Established

date

Revised

date

A5

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.

A5

Standard Repair Process Detail Technical Manual

Error

symptom

Content

A. Video error _Vertical/Horizontal bar,

residual image, light spot

connection diagram

Established

date

Revised

date

A6

As the part connecting to the external input, check the screen condition by signal

A6

Standard Repair Process Detail Technical Manual

Error

symptom

Content

Check Link Cable(LVDS) reconnection condition

A. Video error_Color error

Established

date

Revised

date

A7

Check the contact condition of the Link Cable, especially dust or mis insertion.

A7

Appendix. Examples of Symptoms(Image error)

Check for poor cable contact

Item

CABLE Color smear

CABLE R Color Excessive

CABLE Screen darkness

Symptom

Name

Cause Symptom Image

Poor broken pin of FFC cable

Color is Excessive due to FFC Cable

Contact.

screen is dark due to poor contact due

to disconnection of the FFC cable pin.

CABLE G Color Excessive

G color transient due to poor FFC cable

connection

A - 1/11

Appendix. Examples of Symptoms(Image error)

Check for poor cable contact

Item

CABLE Color spread LVDS cable connection problem

Symptom

Name

Cause Symptom Image

CABLE Screen stop

Due to foreign substance withi nLVDS

cable PIN

A - 2/11

Appendix. Examples of Symptoms(Main)

Check parts by symptom

Item

Main Screen noise Bit noise from horizontal screen

Main Screen noise

Main Dark picture Dark left-side screen

Symptom

Name

Cause Symptom Image

Broken screen due to

Main IC problem

Main Broken picture

Picture problem due to tuner

Top/bottom screen part

Inner side quality problem

A - 3/11

Appendix. Examples of Symptoms(Main)

Check parts by symptom

Item

Main Broken screen Broken screen in a horizontal manner

Main Screen spread Screen corner appears blurry

Main Color Spread Color spread on the screen

Symptom

Name

Cause Symptom Image

Main Blurry Screen Blurry picture on the screen

A - 4/11

Appendix. Examples of Symptoms(Main)

Check parts by symptom

Item

Main Broken picture

Main

Symptom

Name

Right-side

Screen

problem

LG logo

Screen problem

Cause Symptom Image

No problem at the initial stage,

G-color spread after 10 minutes

Right-side screen problem

Screen picture spread problem

Main

Right-side

picture problem

No problem at the initial stage.

During Heat run, right-side picture

problem

A - 5/11

Appendix. Examples of Symptoms(Module)

Check parts by symptom

Item

MODULE

MODULE Internal matter

MODULE Image broken

Symptom

Name

Isometric

Horizontal Bar

Cause Symptom Image

Isometric horizontal bars occur

throughout the screen

BLU internal foreign matter inflow

6 block image broken

MODULE Image broken Screen sync signal broken

A - 6/11

Appendix. Examples of Symptoms(Module)

Check parts by symptom

Item

MODULE Image broken

MODULE

MODULE Vertical smear

Symptom

Name

Bend on the

screen

Cause Symptom Image

Internal damage and image breakage

due to external impact

Bending due to lateral external impact

and internal bending of BLU

Vertical spreading on cube screen in no

signal

MODULE Over color Screen contour part brightly Over color

A - 7/11

Appendix. Examples of Symptoms(Module)

Check parts by symptom

Item

MODULE Vertical bar Center Vertical Bar

MODULE Screen darkness

MODULE Vertical bar Center Vertical Bar

Symptom

Name

Cause Symptom Image

Center of the screen 1 block dark

Darkness at the

MODULE

bottom of the

screen

MODULE internal BLU breakage

A - 8/11

Appendix. Examples of Symptoms(T-Con)

Check parts by symptom

Item

T-CON

Symptom

Name

screen lower

image broken

screen lower

image broken

screen lower

image broken

Cause Symptom Image

T-Con is defective and the picture below

the screen is broken

T-Con is defective and the picture below

the screen is broken

T-Con is defective and the picture below

the screen is broken

T-CON

screen lower

image broken

T-Con is defective and the picture below

the screen is broken

A - 9/11

Appendix. Examples of Symptoms(T-Con)

Check parts by symptom

Item

T-CON Image Broken

T-CON

T-CON Image Broken

Symptom

Name

Darkness at the

top of the screen

Cause Symptom Image

T-CON Wafer Locking The strength is

weak and cable contact failure occurs

Initial normal operation,

upper darkness during heat run

The entire screen is dark and bit noise

occurs

T-CON Image Broken

The entire screen is dark and bit noise

occurs

A - 10/11

Appendix : Exchange Power Board (PSU)

No Light

No picture/Sound Ok

A - 11/11

Standard Repair Process Detail Technical Manual

Error

symptom

Content

ST-BY condition: On or Off Power ON condition: Turn Off

B. Power error _No power

Check front Power Indicator

Established

date

Revised

date

A8

Standard Repair Process Detail Technical Manual

Error

symptom

Content

Check the VLED

B. Power error _No power

Check power input voltage and ST-BY 3.5V

Check the DC 13.2V/20V

Established

date

Revised

date

A9

Standard Repair Process Detail Technical Manual

Error

symptom

Content

B. Power error _Off when on, off whiling viewing

POWER OFF MODE checking method

Established

date

Revised

date

A10

Entry method

1. Press the IN-START button of the remote control for adjustment

2. Check the entry into adjustment item 3

A10

Standard Repair Process Detail Technical Manual

Error

symptom

Content

C. Audio error_No audio/Normal video

Checking method in menu when there is no audio

Established

date

Revised

date

A11

Checking method

1. Press the Setting button on the remote control

2. Select the Sound function of the Menu

3. Select the Sound Out

4. Select TV Speaker

A11

Standard Repair Process Detail Technical Manual

Error

symptom

Content

C. Audio error_No audio/Normal video

Voltage and speaker checking method when there is no audio

②

Established

date

Revised

date

③

A12

①

Speaker 1 SPK R2 SPK R+ 3 SPK L4 SPK L+

Checking order when there is no audio

1.Check the contact condition of or 13.2V, 20V connector of Main Board

2. Measure the 13.2V input voltage supplied from Power Board (If there is no input voltage, remove and check the connector)

3.Connect the tester P5600 to the speaker terminal and if you hear the ‘Chik~ Chik~’ sound when you

touch the GND and output terminal, the speaker is normal.

A12

Standard Repair Process Detail Technical Manual

Error

symptom

Content

Remote control operation checking method

D. Function error

Established

date

Revised

date

A13

① IR & EYE Sensor

IR

LED

Eye

Checking order to check remote control

Checking order

1.Check IR cable condition between IR & Main board.( Check picture number① and ②)

2.Check the standby 3.5V on the terminal (③)

3.AS checking the Pre-Amp(IR LED light) , the power is in ON condition, an Analog Tester needle should move slowly, otherwise, it’s defective.

②

③

Pin Pin name

1 +3.4V_WIFI 2 WIFI_DM 3 WIFI_DP 4 GND 5 WOL/WIFI_PWR_ON 6 +3.4V_WIFI 7 WIFI_SUSPEND/RESUME 8 GND

9 COMBO_RESET

10 BT_WAKE_UP_HOST 11 GND 12 +3.4V_WIFI 13 NC 14 NC 15 NC 16 EYE_SDA 17 EYE_SCL 18 GND 19 IR 20 LED_R 21 GND 22 +3.4V_ST 23 KEY2 24 GND 25 GND

A13

Standard Repair Process Detail Technical Manual

Error

symptom

Content

Magic Remote/WiFi operation checking method

D. Function error

Established

date

Revised

date

A14

① Wifi & BT Front

Wifi & BT Rear

②

Checking order to check motion remote/wifi

Checking order

1.Check BT/Wifi cable condition between BT/Wifi assy & Main board.

2.Check the 3.5V on the terminal 1 pin

③

Pin Pin name

1 +3.4V_WIFI 2 WIFI_DM 3 WIFI_DP 4 GND 5 WOL/WIFI_PWR_ON 6 +3.4V_WIFI 7 WIFI_SUSPEND/RESUME 8 GND

9 COMBO_RESET

10 BT_WAKE_UP_HOST 11 GND 12 +3.4V_WIFI 13 NC 14 NC 15 NC 16 EYE_SDA 17 EYE_SCL 18 GND 19 IR 20 LED_R 21 GND 22 +3.4V_ST 23 KEY2 24 GND 25 GND

A14

Standard Repair Process Detail Technical Manual

Error

1. How to access the remote control

symptom

Content

How to use the Service remote control

E.Etc

0 4 1 3

Established

date

Revised

date

A15

0 4 1 3

A15

Standard Repair Process Detail Technical Manual

Error

symptom

Content

2. Remote control part definition

POWER Power On/Off

How to use the Service remote control

[ETC] Each time pressing the KEY button, Mode gets changed to ETC and P-ONLY each time

E.Etc

Established

date

Revised

date

A16

ETC (Added Function)

P-ONLY (Added Function)

INPUT Change to the external device mode

ARC Change in the order of 16:9=>Zoom1=>Zoom2=>Cinema Zoom=>Aucto Screen=>4:3=>16:9

PSM

SSM (Added Function) Standard(user)=>music=>cinema=>sports=>game=>standard(user)

PIP Picture In Picture is activated

TEXT Access to the Power Only mode

CAP Broadcasting caption(on/off)

MPX Stereo mode (mono, stereo, foreign language) access

Used when in factory mode

Simplink (Added Function)

All KEY function [PIP PR-][PIP PR+][SWAP]

[PIP INPUT][DVI] KEY Function

Changed to factory mode

All KEY function &[INFO][STILL][HDMI HOT][USB HOT][HDMI4] KEY Action

Changes in the order of Bright Picture=>Easy Picture=>Cinema=>Spots=>Game=>

Custom PIcture1=>Custom Picture2=>Bright Picture

Access to the Simplink-connected device

EYE

TILT Used for screen tilting change (Access to the old PDP control mode)

Digital EYE function ON/OFF

For some Model, access to the Test Pattern

A16

Standard Repair Process Detail Technical Manual

Error

symptom

Content

How to use the Service remote control

E.Etc

Established

date

Revised

date

A17

B-TOOTH (Added function)

IN-START

ADJ

X-STUDIO (Added function) HDD,USB, external device’s HDD screen is activated

MENU User function gets activated

EXIT Exit from the current mode

TIME SHIFT (Added function)

MUTE Mute function (0 Volume)

IN-STOP SET to factory mode

VOL + - Volume Up/Down

Connected to Blue-Tooth

Model Nam ex) 42PG60D-NA Current Model Name S/W Version ex)

V03.11.0 Current S/W version

MICOM Version ex) V3.05.0 current Mi-Com version UTT ex) User TV total usage time

POWER OFF STATUS ex) Shows power-off status

Test Pattern (Off=>White=>Red=>Green=>Blue=>Black=>Pattern=>Off) Change

Moves forward/backward of recorded contents

CH + - Channel Up/Down

AV1,2,3 (Added function) Connects to external input 1,2,3

COMP1,2 (Added function) Connects to Component 1,2

HDMI1,2,3,4 (Add function)

DVI (Add function) Connects to DVI

Connects to HDMI 1,2,3,4

A17

Standard Repair Process Detail Technical Manual

Error

symptom

Content

Check items after Main B/D replacement

Check items afer Main B/D(Model Number D/L, White Balance)

1. Press the Service remote control instart Key.

E.Etc

Established

date

Revised

date

No.7 Select Model Number D/L

- Key in the model name and serial number after checking the ID label on the back cover.

A18

2. Press the Service remote control ADJ Key.

A14

A18

No.13 Select White Balance

- Record the R, G, B (GAIN, Cut) value of the color temperature before main board

replacement.

After replacing the main board, key in the recorded value.

Standard Repair Process Detail Technical Manual

Error

symptom

Content

Adjustment Test pattern - ADJ Key

E.Etc

Established

date

Revised

date

A19

P-ONLY  HDMI HOT(Yellow button)  CH ‘+’ or ‘-’ You can view 11 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!)

A19

Smart JIG Power Diagnosis

Muitl Gender Guide

(P/N : RAD33187801) (P/N : RAD32507801)

A20

Power Board Muitl Gender JIG Diagram (P/N: RAD33187801)

18 Marking check

New JIG

No Marking

OLD JIG

28Pin

18Pin

24Pin

13Y/14Y

12Y

24Pin

15Y (LF/UF Series)

18Y SK80/UK89 SK85/SK96 SK95/SK99

24Pin

18Y/19Y

UK63/UK64

UK65/UK68 UK7050 UM73/UM74 UM76/UM79

16Y (OLED B6)

24Pin

18Y/19Y LK57,32/43/49LK54 32LK61/32LK62

43/49LK61

LM63

15Y (OLED)

24Pin

NC

17/18Y /19Y W7 B8, C8 E8, G8 W8 C9/E9

24Pin

16Y (OLED)

28Pin

17Y/18Y/19Y (OLED)

24Pin

16Y/17Y/18Y/19Y

18Pin

(UH/UJ/UK/SK/ /SM

24 Marking Check

28Pin

Cable Connection

17Y/18Y

(SJ/UJ/UK/SK)

12Pin

16/18Y/19Y (UH/UK/UM)

16Y/17Y/18Y/19Y

(LH/LJ/LK/LM)

12Pin

Includes 49UJ63

28Pin

16Y/17Y (UH/SJ)

28Pin

16Y (UH)

18Y/19Y UK74,UK75 UK77,UK78 SK79 SM86

Power Board Muitl Gender JIG Diagnostic model List

<15Y/16Y/17Y/18Y/19Y OLED Model, 16Y/17Y/18Y/19Y LED Model>

Year Product Model

EG92/EG93/EG94

‘15 OLED

EG96

EF95

OLED

‘16

LED

‘17 OLED

’17 LED

‘18 LED

‘18 OLED

‘19 LED

‘19 OLED

B6, C6 E6, G6

UH95/UH96, UH85/UH93 UH77/UH87, UH75/UH76

UH65/UH68, LH68, LH66, LH60,LH54

B7, C7, E7, G7, W7

SJ95/UJ98, SJ85/UJ94

SJ80, UJ77, UJ75/UJ78

UJ65/UJ68, UJ63/UJ67

LJ61/LJ68, LJ55/LJ58

SK80/SK85/SK95

UK78/UK75/UK77/SK79

UK63/UK64/UK65/UK68/UK7050

LK57, 32/43/49LK54, 32LK61/62, 43/49LK61

B8, C8, E8, G8, W8

SM86

UM73/UM74/UM76/UM79

LM63

C9/E9

Power Board Muitl Gender How to Connect

1

▶ Power Board Muitl Gender JIG

2

2013

“A:

2014

▶ Connect the Muiti Gender to the connector (black) as shown in picture 2 of the Smart JIG.

LCD POWER”

Smart Jig Voltage Setting

1

▶ Check power board voltage.

2

▶ Switch the product S/W in JIG to LCD.

▶ LCD MODEL Check the power voltage

and switch to the correct voltage.

※ Note on set up

(The correct power diagnosis can be made only if it is set correctly.)

- 24V Power Board : Change the switch to 24V of Smart Jig Voltage

- 20V Power Board : Change the switch to 24V of Smart Jig Voltage

- 13.2V/18V Power Board : Change the switch to 24V of Smart Jig Voltage

Power B/D Smart Jig Voltage Switch

24V

20V

13.2V/18V

24V

20V

24V

`15Y OLED(EG96,EF95,EG92,EG93,EG94) Power Board Diagnostic method (1)

1

▶ Check power board voltage.

3

2

▶ Switch the product S/W in JIG to LCD.

▶ LCD MODEL Check the power voltage

and switch(24V) to the correct voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

4

▶ Disconnect the Main Board 24Pin Power Cable connector.

▶ Connect the 24Pin Power Cable connector to the Muitl

Gender JIG 24Pin connector

`15Y OLED(EG96,EF95,EG92,EG93,EG94) Power Board Diagnostic method (2)

5 6

▶ When the OK LED(24V,12V) turns on, Power Board is normal.

▶ When the NG LED turns on, the Power Board can be judged as defective.

`16Y OLED(B6) Power Board Diagnostic method

1

3

▶ Connect the 24Pin Power Cable connector to the Multi gender JIG 24Pin connector.

2

▶ Switch the LCD MODEL S/W to 24V by checking the power voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

▶ When the OK LED(24V,12V) turns on, Power Board is normal.

▶ When the NG LED turns on, the Power Board can be judged as defective.

`16Y OLED(C6) Power Board Diagnostic method

1

3

▶ Check power board voltage.

▶ Smart JIG: Fix the LCD MODEL switch to 24V.(Smart JIG)

2

▶ Disconnect the Main Board 24Pin Power Cable connector.

4

▶ Connect the 24Pin Power Cable connector

to the Muitl Gender JIG 24Pin connector

▶ When the OK LED(24V,12V) turns on, Power Board is normal.

`16Y OLED(E6) Power Board Diagnostic method

1

3

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

2

▶ Disconnect the Main Board 24Pin Power Cable connector.

4

▶ Connect the 24Pin Power Cable connector

to the Muitl Gender JIG 24Pin connector

▶ When the OK LED(24V,12V) turns on, Power Board is normal.

▶ When the NG LED turns on, the Power Board can be judged as defective.

`16Y OLED(G6) Power Board Diagnostic method

1

3

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

2

▶ Disconnect the Main Board 24Pin Power Cable connector.

4

▶ Connect the 24Pin Power Cable connector

to the Muitl Gender JIG 24Pin connector

▶ When the OK LED(24V,12V) turns on, Power Board is normal.

▶ When the NG LED turns on, the Power Board can be judged as defective.

`17Y OLED(B7/C7/E7/G7) Power Board Diagnostic method

1

▶ Disconnect the Main Board 28Pin Power Cable connector.

3

2

▶ Connect the 28Pin Power Cable connector to the Muitl Gender JIG 28Pin connector

4

▶ Switch the LCD MODEL S/W to 20V by checking the power voltage.

▶ Fix the LCD MODEL switch to 20V.(Smart JIG)

▶ When the OK LED(24V,12V) turns on, Power Board is normal.

▶ When the NG LED turns on, the Power Board can be judged as defective.

`17Y OLED(W7) Power Board Diagnostic method

1

▶ Disconnect the Main Board 24Pin Power Cable connector.

3

2

▶ Connect the 24Pin Power Cable connector to the Muitl Gender JIG 28Pin connector

4

▶ Switch the LCD MODEL S/W to 20V by checking the power voltage.

▶ Fix the LCD MODEL switch to 20V.(Smart JIG)

▶ When the OK LED(24V,12V) turns on, Power Board is normal.

▶ When the NG LED turns on, the Power Board can be judged as defective.

`16Y/`17Y LED 18Pin Power Board Diagnostic method

1

3

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

2

▶ Disconnect the Main Board 18Pin Power Cable connector.

4

▶ Connect the 18Pin Power Cable connector

to the Muitl Gender JIG 24Pin connector

▶ When the OK LED(24V,12V) turns on, Power Board is normal.

▶ When the NG LED turns on, the Power Board can be judged as defective.

`16Y LED(UH95/UH96) Power Board Diagnostic method

1

3

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

2

▶ Disconnect the Main Board 28Pin Power Cable connector.

4

▶ Connect the 28Pin Power Cable connector

to the Muitl Gender JIG 28Pin connector

▶ When the OK(24V,12V) LED turns on, Power Board is normal.

▶ When the NG LED turns on, the Power Board can be judged as defective.

`16Y/`17Y LED(UH85/UH93) Power Board Diagnostic method

1

3

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

2

▶ Disconnect the Main Board 28Pin Power Cable connector.

4

▶ Connect the 28Pin Power Cable connector

to the Muitl Gender JIG 28Pin connector

▶ When the OK LED(24V,12V) turns on, Power Board is normal.

▶ When the NG LED turns on, the Power Board can be judged as defective.

`16Y/`17Y LED 12Pin Power Board Diagnostic method

1

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

3

2

▶ Disconnect the Main Board 12Pin Power Cable connector.

4

▶ Connect the 12Pin Power Cable connector

to the Muitl Gender JIG 12Pin connector

▶ When the OK LED(24V,12V) turns on, Power Board is normal.

▶ When the NG LED turns on, the Power Board can be judged as defective.

`16Y LED 12Pin Power Board Diagnostic method

1

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 24V.(Smart JIG)

3

2

▶ Disconnect the Main Board 12Pin Power Cable connector.

4

▶ Connect the 12Pin Power Cable connector

to the Muitl Gender JIG 24Pin connector

▶ When the OK LED(24V,12V) turns on, Power Board is normal.

▶ When the NG LED turns on, the Power Board can be judged as defective.

`17Y LED 28Pin Power Board Diagnostic method

1

▶ Check power board voltage.

▶ Fix the LCD MODEL switch to 20V.(Smart JIG)

3

2

▶ Disconnect the Main Board 28Pin Power Cable connector.

4

▶ Connect the 28Pin Power Cable connector

to the Muitl Gender JIG 28Pin connector

▶ When the OK LED(24V,12V) turns on, Power Board is normal.

▶ When the NG LED turns on, the Power Board can be judged as defective.