CONFIDENTIAL
OLED TV
SERVICE MANUAL
CHASSIS : EA92B
MODEL : OLED55B9PUA
OLED65B9PUA
CAUTION
BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL71409504 (1903-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.
Copyright © 2019 LG Electronics Inc. All rights reserved. Only training and service purposes.
CONTENTS
CONTENTS .............................................................................................. |
2 |
SAFETY PRECAUTIONS ........................................................................ |
3 |
SERVICING PRECAUTIONS ................................................................... |
4 |
SPECIFICATION ....................................................................................... |
6 |
SOFTWARE UPDATE .............................................................................. |
9 |
BLOCK DIAGRAM ................................................................................. |
10 |
EXPLODED VIEW .................................................................................. |
17 |
DISASSEMBLY GUIDE .......................................................................... |
18 |
TROUBLE SHOOTING GUIDE ................................................ |
APPENDIX |
- 2 - |
Copyright © |
LG Electronics Inc. All rights reserved. |
|
Only for training and service purposes. |
|
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 MΩ and 5.2 MΩ.
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.
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 - |
Copyright © |
LG Electronics Inc. All rights reserved. |
|
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 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 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 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 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 easily 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 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 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 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 floor can generate static electricity sufficient 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, suctiontype 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 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 - |
Copyright © |
LG Electronics Inc. All rights reserved. |
|
Only for training and service purposes. |
|
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through which the IC leads are inserted and then bent flat 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.
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 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.
- 5 - |
Copyright © |
LG Electronics Inc. All rights reserved. |
|
Only for training and service purposes. |
|
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement.
1. Application range |
3. Test method |
This specification is applied to the OLED TV used EA92B |
(1) Performance: LGE TV test method followed |
chassis. |
(2) Demanded other specification |
|
- Safety : UL, CSA, CE, IEC specification |
2. Test condition |
- EMC : FCC, ICES, CE, IEC specification |
|
|
Each part is tested as below without special appointment. |
|
(1) Temperature : 25 ºC ± 5 ºC(77 ± 9 ºF) , CST : 40 ºC ± 5 ºC |
|
(2) Relative Humidity: 65 % ± 10 % |
|
(3) Power Voltage |
|
: Standard input voltage (AC 100-240 V~, 50/60 Hz) |
|
*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 5 minutes prior to the adjustment.
4.General Specification
No |
|
|
Item |
Specification |
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 gender(1EA) |
|
|
|
|
|
|
|
6 |
HDMI Input |
|
HDMI 1 |
PC / DTV format |
Support 6Gbps |
|
|
|
|
|
|
|
|
|
HDMI 2 |
PC / DTV format |
Support 6Gbps, Support ARC |
|
|
|
|
|
|
|
|
|
HDMI 3 |
PC / DTV format |
Support 6Gbps |
|
|
|
|
|
|
|
|
|
HDMI 4 |
PC / DTV format |
Support 6Gbps |
|
|
|
|
|
|
7 |
Audio Input |
|
AV Audio / DVI Audio |
Rear(AV Gender), Except Korea model |
|
|
|
|
|
|
L/R Input : Rear |
|
|
|
|
|
AV and DVI use same jack |
8 |
Audio out |
|
SPDIF(1EA) |
Optical Audio out |
Rear(1EA) |
|
|
|
|
|
|
|
|
|
HeadPhone(1EA) |
HeadPhone out |
Rear(1EA) |
|
|
|
|
|
|
9 |
USB Input(3EA) |
|
EMF, DivX HD, For SVC (download) |
JPEG, MP3, DivX HD |
|
|
|
|
|
|
|
10 |
Ethernet Connect (1EA) |
Ethernet Connect |
|
||
- 6 - |
Copyright © |
LG Electronics Inc. All rights reserved. |
|
Only for training and service purposes. |
|
5. External Input Support Format
5.1. HDMI Input (PC/DTV)
No. |
Resolution |
H-freq(kHz) |
|
V-freq.(kHz) |
|
Pixel clock(MHz) |
Proposed |
|
Remarks |
||
|
|
|
HDMI-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 Blank- |
|
|
|
|
|
|
|
|
|
|
|
ing) |
|
|
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 |
When HDMI1,2,3,4 |
|
|
|
|
|
|
|
|
|
|
|
UHD DEEP COLOUR ON |
|
15 |
3840*2160 |
135 |
|
60 |
|
|
594 |
|
UDTV 2160P |
||
|
|
|
|
|
|
||||||
|
|
|
|
|
|
|
|
|
|
|
|
16 |
3840*2160 |
225 |
|
100 |
|
|
1188 |
|
UDTV 2160P |
When HDMI1,2,3,4 |
|
|
|
|
|
|
|
|
|
|
|
UHD DEEP COLOUR ON, |
|
17 |
3840*2160 |
270 |
|
120 |
|
|
1188 |
|
UDTV 2160P |
||
|
|
|
|
HDMI SWITCH model |
|||||||
|
|
|
|
|
|
|
|
|
|
||
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 |
When HDMI1,2,3,4 |
|
|
|
|
|
|
|
|
|
|
|
UHD DEEP COLOUR ON |
|
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 |
When HDMI1,2,3,4 |
|
|
|
|
|
|
|
|
|
|
|
UHD DEEP COLOUR ON, |
|
25 |
4096*2160 |
270 |
|
120 |
|
|
1188 |
|
UDTV 2160P |
||
|
|
|
|
HDMI SWITCH model |
|||||||
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
26 |
2560*1440 |
88.78 |
|
60 |
|
|
241.5 |
|
3K |
When HDMI1,2,3,4 |
|
|
|
|
|
|
|
|
|
|
|
UHD DEEP COLOUR ON |
|
27 |
2560*1440 |
183 |
|
120 |
|
|
497.7 |
|
3K |
||
|
|
|
|
|
|
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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) |
|
Spec. out but display |
|||
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 |
|
|
||
- 7 - |
Copyright © |
LG Electronics Inc. All rights reserved. |
|
Only for training and service purposes. |
|
No. |
Resolution |
H-freq(kHz) |
V-freq.(kHz) |
Pixel clock(MHz) |
Proposed |
Remarks |
|
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 |
|
|
|
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|
|
|
|
|
15 |
1920*1080 |
26.97 |
23.97 |
63.29 |
HDTV 1080P |
|
|
|
|
|
|
|
|
|
|
16 |
1920*1080 |
27 |
24 |
63.36 |
HDTV 1080P |
|
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|
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|
|
|
|
|
17 |
1920*1080 |
33.71 |
29.97 |
79.12 |
HDTV 1080P |
|
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|
|
|
|
|
|
|
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 |
|
|
|
|
|
|
|
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|
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 |
|
|
|
|
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|
|
UHD DEEP COLOUR ON |
|
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 |
When HDMI1,2,3,4 |
|
|
|
|
|
|
|
UHD DEEP COLOUR ON, |
|
34 |
3840*2160 |
270 |
120 |
1188 |
UDTV 2160P |
||
HDMI SWITCH Model |
|||||||
|
|
|
|
|
|
||
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 |
|
|
|
|
|
|
|
|
|
|
40 |
4096*2160 |
112.5 |
50 |
594 |
UDTV 2160P |
|
|
|
|
|
|
|
|
|
|
41 |
4096*2160 |
134.86 |
59.94 |
593.4 |
UDTV 2160P |
|
|
|
|
|
|
|
|
|
|
42 |
4096*2160 |
135 |
60 |
594 |
UDTV 2160P |
|
|
|
|
|
|
|
|
|
|
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 |
|
|
46 |
2560*1440 |
183 |
120 |
497.7 |
3K |
|
- 8 - |
Copyright © |
LG Electronics Inc. All rights reserved. |
|
Only for training and service purposes. |
|
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
2. NSU
(This Function is needed to connect to the internet)
(1) Menu -> All Settings -> General -> About This TV
(2)Click [CHEK FOR UPDATES] : system check newest version
(3)Click [DOWNLOAD AND INSTALL]
(4)TV is updating
(5)After finished the update, below Pop-up appear
(6)Turn OFF the TV and On. Check the updated SW Version and Tool Option
- 9 - |
Copyright © |
LG Electronics Inc. All rights reserved. |
|
Only for training and service purposes. |
|
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|
Main .1 |
|
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|
|
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|
|
X_TAL |
|
DDR3 1066 |
Depend on Region |
|
|
Depend on Region |
|
|
|
24MHz |
|
512MB |
|||
|
|
|
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|
|
512MB |
|
|||
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|
|
US / BR |
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I2C 3/5 |
|
M0 |
DDR3 1066 |
|
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Air/ |
|
|
|
IF+, IF- |
|
512MB |
|
||
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|
||||
|
|
TUNER |
|
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|
|
M1 |
|
|||
|
R |
Cable |
|
|
SIF |
|
|
512MB |
|
||
|
|
(Air/Cable) |
|
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|||
|
E |
|
|
|
CVBS |
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||
|
A |
|
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|
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EEPROM(NVRAM) |
|
|
R |
Satellite |
|
|
|
I_P, I_N, Q_P, Q_N |
|
|
I2C 4 |
|
|
|
TUNER |
|
|
|
|
(256Kb) |
|
||||
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|
|
P_TS(Korea / Japan / China) |
|
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|
||||
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|
(S/S2) |
|
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||
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|
|
eMMC |
BLOCK |
|
|
EU/CIS/AJJA |
|
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|
|
(8GB) |
||
|
|
|
|
Side |
USB1 (2.0) |
OCP |
USB2_0 |
|
|
|
|
|
|
|
|
Rear |
USB2 (2.0) |
OCP |
USB2_2 |
|
|
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|
|
|
USB3 (2.0) |
|
USB2_1 |
|
|
OLED T- |
||
- |
|
|
|
|
OCP |
|
I2C 2 |
||||
© Copyright - 10 training for Only |
|
|
|
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|
|
Con |
DIAGRAM |
||
|
|
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|
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|
|
Main IC |
Vx1 |
|||
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|
||||
|
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|
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|
|||
|
HDMI1 HDMI 2.1 |
|
HAWK2 |
|
PHY3_RX0N |
|
I2S Out |
MAIN Audio AMP |
|||
Side |
HDMI2(ARC) HDMI 2.1 |
|
HDMI |
|
PHY2_RX0N |
|
I2C 0 |
(NTP7519) |
|||
|
HDMI3 HDMI 2.1 |
|
2.1 |
|
PHY1_RX0N |
|
|
|
|||
|
|
Switch |
|
|
|
|
|||||
Rear |
HDMI4 HDMI 2.1 |
|
|
|
PHY0_RX0N |
|
|
|
|||
|
|
|
|
|
|
|
|
||||
All .Inc Electronics LG .purposes service and |
|
|
|
|
|
|
|
|
|||
|
Depend on Region |
|
RS232C/HP |
|
|
|
USB_WIFI |
WIFI/BT Combo |
SUB |
||
|
|
|
|
|
|
|
|||||
|
CVBS/COMP |
|
YPbPr AV |
|
|
|
|||||
|
|
|
|
|
|
IR / KEY |
ASSY |
||||
|
|
|
|
OPTIC |
|
SPDIF OUT |
|
|
Sub Micom |
|
|
|
|
|
|
|
|
|
|
|
X_TAL |
||
|
|
|
|
|
|
|
|
|
|
||
.reserved rights |
|
|
|
|
LAN |
|
ETHERNET |
|
I2C 1 |
(RENESAS |
|
|
|
|
|
|
|
R5F100GEAFB) |
32.768KHz |
||||
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
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|
|
|
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|
|
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|
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|
|
|
I2C .2 |
|
|
|
|
|
|
+3.3V_NORMAL |
|
|
|
|
|
|
+3.3V_NORMAL |
Main IC |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
3.3KΩ |
|
2.7KΩ |
|
Depend on Region |
|
|
|
|
|
|
|
||
|
IC5300 |
|
100Ω |
SCL0 |
SCL3 |
|
33Ω |
IC7001 |
|
NTP7519 |
|
SDA0 |
SDA3 |
|
|
LNB |
|
|
|
|
|
|
||||
|
|
|
|
|
|
|
||
|
|
33pF |
|
|
|
|
33Ω |
TUNER(JAPAN) |
|
|
|
|
|
|
|
||
|
|
|
|
+3.3V_NORMAL |
|
|
|
|
|
|
|
|
3.3KΩ |
|
+3.3V_NORMAL |
|
|
|
|
|
|
|
|
|
|
|
|
IC3000 |
33Ω |
|
SCL1 |
|
|
|
|
|
MICOM |
|
SDA1 |
|
|
|
|
|
- |
|
|
|
|
3.3KΩ |
|
|
|
|
|
|
|
|
|
|
||
- 11 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
© Copyright training for Only |
|
|
|
|
SCL4 |
|
33Ω |
IC102 |
|
|
|
|
|
|
NVRAM |
||
|
|
|
|
SDA4 |
|
|
||
|
|
|
|
|
|
|
||
|
|
|
+3.3V_NORMAL |
|
|
|
|
|
|
|
|
|
|
|
33Ω |
IC3600 |
|
|
|
|
3.3KΩ |
|
+3.3V_TU |
|
MSB3100 |
|
|
|
|
|
|
|
|||
All .Inc Electronics LG .purposes service and |
|
|
|
SCL2 |
|
|
|
|
OLED T-con |
|
33Ω |
|
|
|
|
||
|
SDA2 |
|
|
|
|
|||
|
|
|
|
|
|
|
||
|
|
|
|
|
1.2KΩ |
|
|
|
|
|
|
|
SCL5 |
33Ω |
TUNER |
|
|
|
|
|
|
SDA5 |
|
|||
|
|
|
|
|
|
|
||
|
|
|
|
|
|
47pF |
|
|
.reserved rights |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
.reserved rights All .Inc Electronics LG © Copyright - 12 - .purposes service and training for Only
Tuner |
|
+3.3V_TU |
+3.3V_TU |
|
|
|
1.8Kȳ |
|
|
|
|
B1[+3.3V_RF]3 |
|
|
|
[SCL_RF] 1 |
|
33 ȳ |
|
[SDA_RF] 2 |
|
|
|
[IF_P] 8 |
IF_P_TU |
|
TADC_I_INP |
|
IF_N_TU |
FILTER |
TADC_I_INN |
||
[IF_N] 7 |
||||
|
||||
[SIF] 6 |
TU_SIF |
|
|
|
[CVBS] 4 |
TU_CVBS |
|
|
|
[IF_AGC] 5 |
IF_AGC |
|
|
Main IC
SCL5
SDA5
DMD_TADC_INP
DMD_TADC_INN
AAD_ADC_SIF
CVBS_IN1
IFAGC
Tuner .3
.reserved rights All .Inc Electronics LG © Copyright - 13 - .purposes service and training for Only
Jack Side |
SoC Side |
JK3401
AV1_CVBS_IN_SOC
AV_CVBS_IN / AV_L_IN / AV_R_IN
COMP1_Y_IN_SOC
JK3402 |
COMP1_Pb_IN_SOC |
COMP1_Y / COMP_Pb / COMP_Pr
COMP1_Pr_IN_SOC
AUAD_L_CH2_IN
AUAD_R_CH2_IN
Main IC
CVBS_IN2
Y1_IN
PB1_IN
PR1_IN
AUAD_L_CH2_IN
AUAD_R_CH2_IN
Tuner |
TU_CVBS_TU |
TU_CVBS |
CVBS_IN1 |
|
|
||
|
TU_SIF_TU, IF_P/N_TU |
TU_SIF, TADC_I_INN/INP |
AAD_ADC_SIF, DMD_TADC_INP, DMD_TADC_INN |
|
|
|
|
|
I_N/P_TU, Q_N/P_TU |
SADC_I/Q_INN/INP |
DMD_SADC_INN/INP_I, DMD_SADC_INN/INP_Q |
|
|
|
IN Audio & Video .4
.reserved rights All .Inc Electronics LG © Copyright - 14 - .purposes service and training for Only
Jack Side |
SoC Side |
JK3401
AV1_CVBS_IN_SOC
AV_CVBS_IN / AV_L_IN / AV_R_IN
COMP1_Y_IN_SOC
JK3402 |
COMP1_Pb_IN_SOC |
COMP1_Y / COMP_Pb / COMP_Pr
COMP1_Pr_IN_SOC
AUAD_L_CH2_IN
AUAD_R_CH2_IN
Main IC
CVBS_IN2
Y1_IN
PB1_IN
PR1_IN
AUAD_L_CH2_IN
AUAD_R_CH2_IN
Tuner |
TU_CVBS_TU |
TU_CVBS |
CVBS_IN1 |
|
|
||
|
TU_SIF_TU, IF_P/N_TU |
TU_SIF, TADC_I_INN/INP |
AAD_ADC_SIF, DMD_TADC_INP, DMD_TADC_INN |
|
|
|
|
|
I_N/P_TU, Q_N/P_TU |
SADC_I/Q_INN/INP |
DMD_SADC_INN/INP_I, DMD_SADC_INN/INP_Q |
|
|
|
OUT Audio .5
.reserved rights All .Inc Electronics LG © Copyright - 15 - .purposes service and training for Only
DDC_SCL_4
DDC_SDA_4
DDC_SCL_3
DDC_SDA_3
Main IC
DDC_SCL_2
DDC_SDA_2
PHY0_ARC_OUT
DDC_SCL_1
DDC_SDA_1
DDC_SCL_4
DDC_SDA_4
TMDS Link
DDC_SCL_3
DDC_SDA_3
TMDS Link
HDMI 2.1 S/W
IC3800
HAWK2
DDC_SCL_2
DDC_SDA_2
TMDS Link
HDMI_ARC
DDC_SCL_1
DDC_SDA_1
TMDS Link
X-Tal(X3000)
32.768kHz
JK3104
RENESAS
MICOM(IC3000)
HDMI4 (SIDE)
HDMI 2.1
JK3103
HDMI3 (SIDE) 
HDMI2.1
HDMI2 (SIDE) with ARC HDMI 2.1
JK3101
HDMI1 (SIDE)
HDMI2.1
Q3001
HDMI_CEC_MICOM
REMOTE_CEC
HDMI .6
.reserved rights All .Inc Electronics LG © Copyright - 16 - .purposes service and training for Only
Main IC
USB2.0_1_DM0
USB2.0_1_DP0
USB2.0_2_DM1
USB2.0_2_DP1
USB2.0_3_DM0
USB2.0_3_DP0
USB2_2_DM0
USB2_2_DP0
UART0_TXD/GPIO105 UART0_RXD/GPIO106
/USB_OCD2 USB_CTL2
/USB_OCD2 USB_CTL2
/USB_OCD2 USB_CTL2
WIFI_DM
WIFI_DP
SOC_TX
SOC_RX
USB2.0 |
|
|
||||
|
USB1(SIDE) +5V_USB_1 |
OCP |
|
|||
|
|
|
|
IC4700 |
+5V_NORMAL |
|
JK4200 |
||||||
|
|
|
|
BD2242G |
|
|
USB2.0 |
|
|
||||
|
|
|||||
USB2(SIDE) +5V_USB_2 |
|
|
||||
|
|
|
|
OCP |
IC1600 |
|
JK4400 |
||||||
IC4501 |
+5V_NORMAL SYVL86A |
|||||
|
|
|
|
BD2242G |
5V / 6A |
|
USB2.0
USB3(Rear) +5V_USB_3
JK4600 OCP
IC4700 BD2242G
BT_RESET
BT_WAKEUP_DEVICE
BT_WAKEUP_HOST
IC7200 
MAX3232CDR
RENESAS MICOM(IC3000)
+5V_NORMAL
WIFI Combo
UART / Remote-M / Fi-Wi / USB .7
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.
920
700 |
|
400 |
|
900 |
|
|
|
|
|
A10 |
|
811 |
|
|
AR2 |
|
|
|
710 |
|
800 |
|
|
|
|
|
|
120 |
571 570 |
LV1 LV2 |
540 521 |
HS1 |
HW1 |
|
|
|
|
|
500 |
200T |
|
HP1 |
810 |
121 |
200 |
|
|
|
|
530
- 17 - |
Copyright © |
LG Electronics Inc. All rights reserved. |
|
Only for training and service purposes. |
|
DISASSEMBLY GUIDE
Total Screw No. : 33ea
1.Remove screw 1ea, disassemble power cord from back cover.
*Push the latch, separate the stand cover to the top.
1 |
1 |
1 Latch : 2 EA
2.Remove screw 4ea, disassemble stand from back cover.
*Push the latch, separate the stand cover to the top.
1 |
1 |
1 |
1 |
1 Screw : 4 EA
- 18 - |
Copyright © |
LG Electronics Inc. All rights reserved. |
|
Only for training and service purposes. |
|
3. Remove screw 1ea, disassemble power cord from back cover
1
1Screw : 1 EA
4.Remove screw 4 EA, disassemble back cover from module.
* Put hand on the marked area(
), separate the back cover to the top.
2 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
|
|
|
|
|
|
|
2 |
2 |
|
|
|
|
|
|
2 |
|
|
|
|
|
|
|
2 |
|
|
|
1 |
1 |
|
|
|
|
1 |
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1 |
1 Screw : 4 EA |
2 Latch : 12ea |
- 19 - |
Copyright © |
LG Electronics Inc. All rights reserved. |
|
Only for training and service purposes. |
|
5. Remove screw 1ea, disassemble Wifi/Jog assy.
1 Screw : 1ea
1
6. Remove the latch 2ea, disassemble IR assy.
2 |
2 |
2 Latch : 2ea |
Slide
- 20 - |
Copyright © |
LG Electronics Inc. All rights reserved. |
|
Only for training and service purposes. |
|
7. Remove all sort of cable.
8. Disassemble speaker.
- 21 - |
Copyright © |
LG Electronics Inc. All rights reserved. |
|
Only for training and service purposes. |
|
9. Remove screw 12ea, disassemble Main PCB and PSU.
1 Screw : 12ea
1 |
1 |
1 |
1 |
1 |
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1 |
1
1
1 |
1 |
1 |
1 |
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10. Remove screw 7ea, disassemble stand guide and stand fixer.
1 |
1 |
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1 |
1 |
1 Screw : 7ea
1 |
1 |
1 |
- 22 - |
Copyright © |
LG Electronics Inc. All rights reserved. |
|
Only for training and service purposes. |
|
11. Remove screw 4 EA, disassemble VESA Bracket
1 |
1 |
1 |
1 |
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1 Screw : 4ea
- 23 - |
Copyright © |
LG Electronics Inc. All rights reserved. |
|
Only for training and service purposes. |
|
TROUBLE SHOOTING GUIDE
Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Contents of Standard Repair Process
No. |
Error symptom (High category) |
Error symptom (Mid category) |
Page |
Remarks |
|
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1 |
|
No video/Normal audio |
1 |
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2 |
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No video/No audio |
2 |
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3 |
A. Video error |
Picture broken/Freezing |
3 |
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4 |
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Color error |
4 |
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5 |
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Vertical/Horizontal bar, residual image, |
5 |
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light spot, external device color error |
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6 |
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No power |
6 |
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B. Power error |
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7 |
Off when on, off while viewing, |
7-9 |
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power auto on/off |
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8 |
C. Audio error |
No audio/Normal video |
10 |
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9 |
Wrecked audio/discontinuation/noise |
11 |
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10 |
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Remote control & Local switch checking |
12 |
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11 |
D. Function error |
Magic Remote control operating checking |
13 |
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12 |
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Wi-Fi operating checking |
14 |
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13 |
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External device recognition error |
15 |
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14 |
E. Noise |
Circuit noise, mechanical noise |
16 |
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15 |
F. Exterior error |
Exterior defect |
17 |
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First of all, Check whether there is SVC Bulletin in GSCS System for these model.
Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Standard Repair Process
|
|
|
A. Video error |
Established |
|
|
|
|
|
Error |
date |
|
|
|
|
|
|
symptom |
No video / Normal audio |
Revised date |
|
1/17 |
|
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|||
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|
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First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D↔ Power B/D, Vx1 Cable, Speaker Cable, IR B/D Cable and so on)
|
|
A1 |
|
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A10/A11 |
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No video |
Normal Y |
|
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Y |
Check Power Board |
Check Vx1 lock |
0V |
||||
Normal audio |
Audio |
voltage |
|
output to Main. |
|
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(20V, 12V) |
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N |
|
A10/A11 |
N |
|
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Move to |
|
Check Power Board output to Module |
|
No Video/No audio |
|
||
|
55”/65” : 22V, 12V |
|
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77” : 23V, 12V |
|
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Normal |
Y |
|
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Replace Module |
|||
Voltage |
|
||
|
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N
Replace Power B/D or repair parts
Precaution A4 & A2 |
|
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Always check & record S/W Version and White Balance value |
|
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Replace Main B/D |
|
|
before replacing the Main Board |
|
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Normal |
Y |
|
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Replace Main B/D |
|||
Voltage |
|
||
|
|
N
Replace Power B/D or repair parts
End
Re-enter White Balance value
1
Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Standard Repair Process
|
|
|
A. Video error |
Established |
|
|
|
|
|
Error |
date |
|
|
|
|
|
|
symptom |
No video / No audio |
Revised date |
|
2/17 |
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
A10/A11
|
|
Check Power Board |
Normal Y |
Check and replace |
|
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|
|
|
No Video / |
|
|
|
|
|||||
No audio |
|
output to Main (20V, 12V ) |
Voltage? |
Main B/D |
|
|
|||
|
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|
|
N |
|
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End |
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Replace Power B/D |
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or repair parts |
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|
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2
Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
Standard Repair Process
|
|
Error |
A. Video error |
Established |
|
|
|
|
|
date |
|
|
|
||
|
|
|
|
|
|
||
|
|
symptom |
Picture broken / Freezing |
Revised date |
|
3/17 |
|
|
|
|
|
|
|||
|
|
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|
|
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|
|
A3 |
- By using Digital signal level meter |
|
- By using Diagnostics menu on OSD |
||
Check RF Signal level |
||
(All Settings → Programmes → Programme Tuning & Settings → Manual Tuning → Antenna DTV |
||
|
Check the signal level) |
|
|
- Signal Strength (Normal : over 50%) |
|
|
- Signal Quality (Normal : over 50%) |
Normal Y
Signal?
N
Check RF Cable
Connection
1.Reconnection
2.Install Booster
Normal N
Picture?
Y
Close
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 Y |
Check |
Picture? |
S/W Version |
N |
|
Contact with signal distributor or broadcaster (Cable or Air)
SVC |
N |
Check Tuner |
Y |
Bulletin? |
|
soldering |
Close |
|
|
||
Y |
|
N |
|
|
|
|
|
S/W Upgrade |
|
|
|
Normal |
N |
|
|
|
|
|
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Picture? |
|
Replace |
|
|
|
|
|
|
|
Main B/D |
|
Y |
|
|
|
Close |
|
|
|
3
Copyright © 2019 LG Electronics Inc. All rights reserved. Only for training and service purposes.
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