Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the
Schematic Diagram and 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 sh orts of the cir cui try 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.
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 conict 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 specied 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 specied 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 specied 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 classied as “anti-static” can generate
electrical charges sufcient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charges sufcient 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 sufcient 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
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).
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.
This specification sheet is applied all of the EJ34D OLED TV
models, which produced in manufacture department or similar
LG TV factory
2. Designation
(1) Th e adju stment is ac cordi ng to the order whic h is
designated and which must be followed, according to the
plan whic al Unit: Product Specification Standard.
(2) Power adjustment : Free Voltage.
(3) Magnetic Field Condition: Nil.
(4) Input signal Unit: Product Specification Standard.
(5) Reserve after operation: Above 5 Minutes (Heat Run).
ºC
±5
Temperature : at 25
Relative humidity : 65 ± 10%
Input voltage : 100~220V, 50/60Hz
(6) Adjustment eq uip men ts : Color Analyzer (CA-210 or
CA-110), SVC remote controller
(7) Push The “IN STOP KEY” – For memory initialization.
Case1 : Software version up
1) After downloading S/W by USB , TV set will reboot
automatically
2) Push “In-stop” key
3) Push “Power on” key
4) Function inspection
5) After function inspection, Push “In-stop” key.
Case2 : Function check at the assembly line
1) When TV set is entering on the assembly line, Push
“In-stop” key at first.
2) Push “Power on” key for turning it on.
=> If you push “Power on” key, TV set will recover channel
information by itself.
3).After function inspection, Push “In-stop” key.
ºC
3.2. Final Assembly adjustment
(1) White Balance adjustment
(2) RS-232C functionality check
(3) Factory Option setting per destination
(4) Shipment mode setting (IN-STOP)
(5) GND and HI-POT test
* After downloading, have to adjust TOOL OPTION again.
(1) Push "IN-START" key in service remote controller.
(2) Select "Tool Option 1" and Push “OK” button.
(3) Punch in the number. (Each of models has their number.)
[See the BOM]
(4) Completed selecting Tool option.
● Tool option
Tool
Tool
Tool
Tool
Tool
ModelModule
55EA8800-SC
option1
option2
option3
option4
LGD327755456158173708539062135947243
option5
Tool
option6
3.3. ADC Process
3.3.1. ADC Calibration : Internal Auto ADC
AD C ca libra tion is not ne cessa ry becaus e MAIN SoC
(LGExxxx) is already calibrated from IC Maker
- Resol ution: 480i Com p1 (MSPG-925 FA: mod el- 209,
pattern-65)
- Resolution: 1080p Comp1 (MSPG-925FA: model-225,
pattern-65)
- Resol ution : 1080p RGB (MSPG-925FA: model-225,
pattern-65)
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level: 0.7±0.1 Vp-p
Tool
option7
3. Main PCB check process
3.1. Main PCBA Adjustments
(1) ADC adjustment: Component 480i, 1080p / RGB-PC 1080p
(2) EDID downloads for HDMI and RGB-PC
(3) MAC Address / ESN / Widevine Download
※ Remark
- Above adjustment items can be also performed in Final
Assembly if needed. Adjustment items in both PCBA and
final assembly stages can be checked by using the INSTART
Menu → 1.ADJUST CHECK
Only for training and service purposes
3.3.2.2. Adjust method
▪ ADC 480i/1080p Comp
(1) Check connected cond it io n o f Co mp ca bl e t o th e
equipment
(2) Give a 480i Mode, Horizontal 100% Color Bar Pattern to
Comp1. (MSPG-925FA -> Model: 209, Pattern: 65)
(3) Change input mode as Component1 and picture mode as
“Standard”
(4) Press the In-start Key on the ADJ remote after at least 1
min of signal reception. Then, select 7.External ADC. And
Press OK or Right Button for going to sub menu.
(5) Press OK in Comp 480i menu
(6) Give a 1080p Mode, Horizontal 100% Color Bar Pattern to
Comp1. (MSPG-925FA -> Model: 225, Pattern: 65)
(7) Press OK in Comp 1080p menu
(8) If ADC Comp is successful, “ADC Component Success” is
displayed.
(9) If ADC calibration is failure, “ADC Component Fail” is
displayed.
(10) If ADC calibration is failure, after rechecking ADC pattern
or condition, retry calibration
(11) If ADC calibration is failure, after recheck ADC pattern or
■ Check Input and Signal items. (cf. work instructions)
(1) TV
(2) AV (CVBS)
(3) COMPONENT (480i)
(4) HDMI
* Display and Sound check is executed by Remote controller.
※ Caution : Not to push the INSTOP KEY after completion if
the function inspection.
3.5. EDID/DDC Download
3.5.1. Overview
It is a VESA regulation. A PC or a MNT will display an optimal
resolution through information sharing without any necessity of
user input. It is a realization of “Plug and Play
3.5.2. Equipment
▪ Adjust remocon.
▪ Since embedded EDID data is used, EDID download JIG,
HDMI cable and D-sub cable are not need
3.5.3. Download method
(1) Press Adj. key on the Adj. R/C,
(2) Select EDID D/L menu.
(3) By pressing Enter key, EDID download will begin
(4) If Download is successful, OK is display, but If Download is
failure, NG is displayed.
(5) If Download is failure, Re-try downloads.
3.6. MAC Address, ESN Key and Widevine
Key download
3.6.1. Equipment & Condition
(1) Play file: keydownload.exe
3.6.2. Communication Port connection
(1) Key Write: Com 1,2,3,4 and 115200 (Baudrate)
(2) Barcode: Com 1,2,3,4 and 9600 (Baudrate)
3.6.3. Download process
(1) Select the download items.
(2) Mode check: Online Only
(3) Check the test process
- U S, Canad a model s: DET EC T → MAC _W RITE →
WIDEVINE_WRITE
- Korea, Me xico mod el s: DETEC T → MAC_WRI TE →
WIDEVINE_WRITE
(4) Play: START
(5) Check of result: Ready, Test, OK or NG
3.6.4. Communication Port connection
(1) Connect: PCBA Jig→ RS-232C Port == PC → RS-232C
Port
※Caution) When EDID Download, must remove RGB/HDMI
Cable
3.7. LAN port Inspection (Ping Test)
3.7.1. LAN port Inspection (Ping Test)
(1) Play the LAN Port Test PROGRAM.
(2) Input IP set up for an inspection to Test Program
▪ In case of keeping module is in the circumstance of 0°C, it
should be placed in the circumstance of above 15°C for 2
hours
▪ In case of keeping module is in the circumstance of below
-20°C, it should be placed in the circumstance of above 15°C
for 3 hours.
- Purpose : Adj ust the co lor temperature to reduce th e
deviation of the module color temperature.
- Principle : To adjust the wh ite b al an ce wi th ou t th e
saturation,Fix the one of R/G/B gain to 192 (default data) and
decrease the others.
- Adjustment mode : Three modes – Cool / Medium / Warm
● Required Equipment
- Remote controller for adjustment
- Color Analyzer : CA100+ or CA-210 or same product (should
be used in the calibrated ch by CS-1000)
▪ LCD TV : CH-9
▪ PDP TV : CH-10
▪ White LED TV : CH-14
▪ ALEF : CH-18
▪ RGB LED(MNT) : CH-16
- Auto W/B adjustment instrument(only for Auto adjustment)
3.8. Camera Port Inspection
(1) Objective : To check PCBA’s CAMERA Port.
(2) How-it-works
i) Connect the PCBA like below Picture.
ii) Send specific RS-232C Command for displaying Camera
Preview.
* CAMERA need to be status of Slide up.
(3) RS-232C Command
RS-232C COMMAND
CMDDATAID
Ai0023Camera Function Start.
Ai0024Camera Function End.
Explanation
4.1.1. Adjustment of White Balance :
(For Automatic Adjustment)
C o nne c tin g d iagr am o f equi p men t f or
measuring (For Automatic Adjustment)
Color Analyzer
Probe
RS-232C
※
Signal Source
※
Pattern Generator
(1) Set TV in ADJ mode using P-ONLY key (or POWER ON
key)
(2) Place optical probe on the center of the display
- It need to check probe condition of zero calibration before
adjustment.
(3) Connect RS-232C Cable
(4) Select mode in ADJ Program and begin a adjustment.
(5) When WB adjustment is completed with OK message,
check adjustment status of pre-set mode (Cool, Medium,
Warm)
(6) Remove probe and RS-232C cable.
▪ W/B Adj. must begin as start command “wb 00 00” , and
finish as end command “wb 00 ff”, and Adj. offset if need
(2) Adj. Computer (During auto adj., RS-232C protocol is
needed)
(3) Adjust Remocon
(4) Vi deo Sig nal Genera tor MSP G-925F 720p/216-Gray
(Model: 217, Pattern: 78)
4.1.2.3. Adjustment
(1) Set TV in Adj. mode using POWER ON
(2) Zero Calibrate the probe of Color Analyzer, then place it on
the center of LCD module within 10cm of the surface.
(3) Press ADJ key - EZ adjust using adj. R/C → 6. White-
Balance then press the cursor to the right (KEY►). When
KEY(►) is pressed 216 Gray inte rnal pattern will be
displayed.
(4) One of R Gain / G Gain / B Gain should be fixed at 192,
and the rest will be lowered to meet the desired value.
(5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of
color temperature.
※ If internal pattern is not available, use RF input. In EZ Adj.
menu 6.White Balance, you can select one of 2 Testpattern: ON, OFF. Default is inner(ON). By selecting OFF,
you can adjust using RF signal in 216 Gray pattern.
4.1.3. LED White balance table
(for Manual adjustment)
4.1.3.1. Cool Mode
(1) Purpose : Especially G-gain fix adjust leads to the luminance
enhancement. Adjust the color temperature to reduce the
deviation of the module color temperature.
(2) Principle : To adjust the white balance without the saturation,
Adjust the G gain more than 172 ( If R gain or G gain is more
than 255 , G gain can adjust less than 172 ) and change the
others ( R/B Gain ).
(3) Adjustment mode : mode – Cool
4.1.3.2.Medium / Warm Mode
(1) Purpose : Adjust the color temperature to reduce the deviation
of the module color temperature.
(2) Princ ip le : To adjust th e wh it e b al an ce w it ho ut the
saturation,Fix the one of R/G/B gain to 192 (default data) and
decrease the others.
(3) Adjustment mode : Two modes – Medium / Warm
▪ Standard color coordinate and temperature when using the
CA100+or CA210 equipment
Mode
Cool0.271±0.0020.270±0.00213,000K0.0000
Medium0.285±0.0020.293±0.0029,300K0.0000
Warm0.313±0.0020.329±0.0026,500K0.0030
change reason : When vi vi d mode, m or e detail th an other
▪ In case of Edge LED module, the color coordinates is changing
by aging, so you have to use the below table.
The Time Table of color coordinates by SET Aging Time
(1) LED Models(LA7xxx, LA8XXX, 55LA9600)_nomal line
Aging time
GP4
10-2281 287 295310320342
23-5280 285 294308319340
36-9278 284 292307317339
410-19276 281 290304315336
520-35275 277 289300314332
636-49274 274 288297313329
750-79273 272 287295312327
880-119272 271 286294311326
9Over 120271 270 285293310325
(2) LED Models(LA7x xx , LA8XXX, 55LA9600)_a ga in g
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essenti al that these sp ecial safet y parts shoul d be replac ed with the same compon ents as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
DDR3 1.5V bypass Cap - Place these caps near Memory
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
-------------------------------- HIGH HIGH CARD PRESENT
LOW HIGH CARD not PRESENT
SMARTCARD_VCC/SD_EMMC_CMD
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Example of Option name
TU_Q_T2 = apply TDSQ type tuner and T2 country
TU_M/W = apply TDSM&TDSW Type Tuner
13’ Tuner Type for Global
TDS’S’-G501D : T/C Half NIM Horizontal Type
TDS’Q’-G501D : T/C/S2 Combo Horizontal type
TDS’Q’-G601D : T2/C/S2 Combo Horizontal Type
TDS’Q’-G651D : T2/C/S2 Combo Vertical Type
TDS’M’-C601D : China NIM with Isolater Type
TDS’W’-J551F : Japan Dual NIM
TDS’W’-B651F : Brazil 2Tuner
TDS’W’-A651F : Taiwan 2Tuner
TDS’W’-K651F : Colombia DVB-T2 2Tuner
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Input trace widths should be sized to conduct at least 3A
Ouput trace widths should be sized to conduct at least 2A
LNB
R6903
39K
1/16W
1%
Caution!! need isolated GND
A_GND
R6904
0
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
eMMC
11.09.29
81
Page 49
Page 50
OLED vs. LED
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
OLED is next generation display which is simple, thin and light. OLED can achieve natural and vivid colors due to self-emitting
characteristics
Polarizing plate
BLU
+Prism
+Diffuser
LCD
TFT Cell CF Polarizing plate
Indirect light source display, which is
complex and consists of many
components.
Light is supplied from BLU and goes
through many layers
OLED
TFT&OLED Polarizing plate
Simple structure with not many
components (without BLU) Paper
slim & light
Self-emitting display
Better response time / contrast
ratio compared to LCD
Page 51
Main PCB for Broadband
55EA9800
CAM USB
Cl
r
Motionassy
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Local Dim.
To PSU
ear Speake
Module
wifi
IR + Digital Eye
Front Spk
Local Key
1
Main processor_Digital(LG1152D),
1
DDR Memory
Flash Memory
Main processor_analog(LG1152A)
2
2
Micom for Key/IR sensing
3
5
4
3
4
5
Audio AMP (Max 12W)
HDMI switch (4:1)
Page 52
H13 Block diagram
DIF(P/N)
Audi
I2S
HDMI_CEC
RMII
FRC
LVDS : Quad
DDR3
DDR3
DDR3
DDR3
eMMC
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Tuner
SCART
_
PC AUDIO
AV1
COMP1
HDMI1~4
Logo Light
USB_W-iFi
USB1(USB3.0)
USB2(USB2.0)
USB3(USB2.0)
USB_CAM
LAN
LNB
SC_CVBS, RGB, Audio L/R
DTV/MNT_LR/V_OUT
PC_Audio_L/R
AV1_Audio L/R
Comp1 Y,Pb,Pr
WOL / WOW
CVBS
SIF
AV1_CVBS
HDMI
Switch
PHY
USB
HUB
LG1154A
USB 2.0
USB 3.0
USB 2.0
USB 2.0
H13
AUD
BB_TP_DATA
CVBS
DAC_DATA
AAD_DATA
HSR_P/M
M-Remote_Rx/Tx
SPDIF
IRB_SPI
H13
LG1154D
TCON
16
16
16
16
8
H/P Audio L/R
H/P AMP
AMP
CI
IR_B
Micom
o
Motion-R
OPTIC
IR_Blaster
H/P
SPK/
Clear Speaker
CI
OLED Module
4Gb×4 (1600)
Page 53
H13 Block diagram
D
Global Baseband
Multi
STD
UARTx3
1ch@30MHz
I2Cx10
I2S(HPD)
OTP
Encoder
e
e
b
C
RPE
S
o
O
(3CH)
/
DDR
DDR
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
First of all, Check whether there is SVC Bulletin in GCSC System for these model.
Page 62
Standard Repair Process
Revised date
1/16
No video/ Normal audio
Always check & record S/W Version and White
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Established
date
2013.01.31
LCD TV
Error
symptom
A. Video error
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D↔ Power B/D, EPI Cable,Speaker Cable,IR B/D Cable,,,)
☞A18☞A1
No video
Normal audio
Normal
audio
Move to No
video/No audio
Y
N
Check OLED Light
On with naked eye
☞A18
Check Power Board 24V output
On
Normal
voltage
Repair Power
Board or parts
Y
Check Power
Board
24V, 12V,3.5V etc.
N
Replace Inverter
Y
or module
N
Normal
voltage
Repair Power
Board or parts
End
Y
N
Replace T-con
Board or module
And Adjust VCOM
※Precaution
Balance value before replacing the Main Board
☞A4 & A2
Replace Main Board
Re-enter White Balance value
1
Page 63
Standard Repair Process
No video/ No audio
Revised date
2/16
Checkvarious
Check and
Y
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
symptom
No Video/
No audio
Error
☞A18
voltages of Power
Board ( 3.5V,12V,20V
or 24V…)
A. Video error
Normal
voltage?
N
Replace Power
Board and repair
parts
replace
MAIN B/D
Established
date
2013.01.31
End
2
Page 64
Standard Repair Process
Picture broken/ Freezing
Revised date
3/16
A3
using Digital signal level meter
DVDPlayer,Set
Top
Box,DifferentmakerTVetc
T
Close
Contact with signal distributor
Normal
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
☞
Check RF Signal level
Normal
Signal?
N
Check RF Cable
Connection
1. Reconnection
2. Install Booster
Y
Error
symptom
A. Video error
. By
. By using Diagnostics menu on OSD
( Setting→ Set up→ 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)
-
→
-
☞ A4
Normal
Picture?
N
Y
Check
S/W Version
`
SVC
Bulletin?
Y
Established
date
N
2013.01.31
Check
uner soldering
N
Y
N
Picture?
Y
Close
or broadcaster (Cable or Air)
S/W Upgrade
Normal
Picture?
Y
Close
N
Replace
Main B/D
3
Page 65
Standard Repair Process
Color error
Revised date
4/16
r
r
r
Replace Main B/D
COMPONENT
Replace module
/Cabl
C
t
external
Repl
B/D
Check Test
Externaldevice
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
☞A6
Check color by input
-External Input
-
-AV
-HDMI
☞A8
pattern
Error
symptom
Colo
error?
N
Check error
color input
mode
A. Video error
☞ A7
※ Check
and replace
Y
Link Cable
(EPI) and
contact
condition
External Input/
omponen
error
Colo
error?
N
Check
device and
cable
Established
date
2013.01.31
Y
Y
External device
e
normal
N
Colo
error?
End
Y
N
ace Main
HDMI
error
Check external
device and
cable
4
Request repair
for external
device/cable
N
/Cable
normal
Y
Replace Main B/D
Page 66
Standard Repair Process
Revised date
5/16
Module
Cable
(adjust VCOM)
HDMI
A8
r
Replace
Ext
Main B/D
normal?
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
A. Video error
LCD TV
Error
symptom
Vertical / Horizontal bar, residual image,
light spot, external device color error
Vertical/Horizontal bar, residual image, light spot
☞A6
Check color condition by input
-External Input
-Component
-
☞
Check Test pattern
Screen
normal?
N
Replace
module
Check external
Y
device
connection
condition
Normal?
N
Request repair
for external
device
External device screen error-Color error
☞ A7
Check and
Y
replace Link
Established
date
Screen
normal?
Y
End
2013.01.31
N
Replace Main B/D
For LGD panel
Replace Main B/D
For other panel
Replace
N
Screen
normal?
Y
End
Check S/W Version
Check
version
Y
S/W Upgrade
Normal
screen?
Y
End
Check screen
condition by input
N
N
-External Input
-Component
-HDMI/DVI
External
Input
erro
Component
error
HDMI/
DVI
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
ernal Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
Screen
normal?
Request repair for
external device
Screen
N
Y
Y
N
Main B/D
Replace
5
Page 67
Standard Repair Process
No power
Revised date
6/16
DC Power on
N
Repl
Check Power cord
Replace Main B/D
g
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
☞A17
Check
Logo LED
. Stand-By: Red or Turn Off
. Operating: Turn Off
Power LED
was inserted properly
Error
symptom
On?
N
Normal?
Y
Close
Y
N
※
B. Power error
Check ST-BY 3.5V
☞A18
by pressing Power Key
On Remote control
Y
Normal
Y
voltage?
N
Established
date
2013.01.31
☞A18
Normal
operation?
Y
Check Power
On ‘”High”
☞A18
Measure voltage of each output of Power B/D
Normal
voltage?
Replace Power B/D
Y
N
Replace Main B/D
OK?
Y
ace
Power
B/D
Replace Power
B/D
6
Page 68
Standard Repair Process
Off when on, off while viewing, power auto on/off
Revised date
7/16
Check for all 3
-
phase
(If Power Off mode
Check
"POWEROFF_REMOTEKEY"
P
REMOTE CONTROL
N
l
"POWEROFF_ONTIMER"
P
TIMER
"POWEROFF_UNKNOWN"
P
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Check outlet
Check A/C cord
power out
Error
symptom
Error?
Y
Fix A/C cord & Outlet
and check each 3
phase out
B. Power error
Established
date
2013.01.31
☞A19
N
Check Power Off
Mode
CPU
Abnormal
Abnormal
1
Replace Main B/D
Normal?
Replace Power B/D
Y
End
N
☞A18
is not displayed)
Check Power B/D
voltage
※ Caution
and fix exterior
of Power B/D Part
Normal
voltage?
Replace Power B/D
Y
Replace Main B/D
N
* Please refer to the all cases which
can be displayed on power off mode.
StatusPower off ListExplanation
ower off by
"POWEROFF_OFFTIMER"Power off by OFF TIMER
"POWEROFF_SLEEPTIMER"Power off by SLEEP TIMER
"POWEROFF_INSTOP"Power off by INSTOP KEY
"POWEROFF_AUTOOFF"Power off by AUTO OFF
orma
Abnormal
"POWEROFF_20V_DET"Power off by AC OFF
"POWEROFF_RESREC"Power off by Reservated Record
"POWEROFF_RECEND"Power off by End of Recording
"POWEROFF_SWDOWN"Power off by S/W Download
"POWEROFF_ABNORMAL1"Power off by abnormal status except CPU trouble
"POWEROFF_CPUABNORMAL"Power off by CPU Abnormal
ower off by ON
ower off by unknown status except listed case
7
Page 69
Standard Repair Process
No audio/ Normal video
Revised date
8/16
Speaker off
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
No audio
Screen normal
Error
symptom
☞A20☞A21+A18
Check user
menu >
C. Audio error
N
Off
Y
Cancel OFF
Check audio B+ 24
of Power Board
Replace Power Board and repair parts
Established
date
Normal
voltage
N
2013.01.31
Y
Check
Speaker
disconnection
Y
Replace Speaker
8
N
Replace MAIN Board
EndDisconnection
Page 70
Standard Repair Process
Wrecked audio/ discontinuation/noise
Revised date
9/16
☞
A21+A18
-
RF
received)
Connect and check
Normal
Checkandfixexternaldevice
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Check input
signal
-External Input
signal
Established
date
2013.01.31
Error
symptom
C. Audio error
→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio
Y
Signal
normal?
N
Y
(When RF signal is not
Wrecked audio/
Discontinuation/
Noise for
all audio
Wrecked audio/
Discontinuation/
Noise only
for D-TV
Wrecked audio/
Discontinuation/
Noise only
for Analog
Check and replace
speaker and
connector
Replace Main B/D
Check audio
B+ Voltage (24V)
Normal
voltage?
N
Replace Power B/D
Request repair to external
cable/ANT provider
(In case of
External Input
signal error)
Check and fix
external device
Wrecked audio/
Discontinuation/
Noise only
for External Input
9
other external
device
Replace Main B/D
N
audio?
Y
End
Page 71
Standard Repair Process
Remote control & Local switch checking
Revised date
10/16
A22
☞
A18
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
D. Function error
LCD TV
Error
symptom
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
Check & Replace
Y
N
Baterry of R/C
Normal
operating?
Check & Repair
Cable connection
Connector solder
Y
Close
N
Normal
operating?
Y
Close
☞A22
N
On Main B/D
Established
date
Check B+
3.5V
Check 3.5v on Power B/D
Replace Power B/D or
(Power B/D don’t have problem)
Normal
Voltage?
N
Replace Main B/D
☞
Y
Check IR
Output signal
2013.01.31
Replace
Main B/D
Normal
Signal?
N
Repair/Replace
IR B/D
Y
Replace R/C
10
Page 72
Standard Repair Process
MR13/P operating checking
Revised date
11/16
Y
y
N
y
Cl
download
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
D. Function error
LCD TV
Error
symptom
2. MR13/P (Magic Remocon) operating error
☞A4
Check the
INSTART menu
RF Receiver ver
is “00.00”?
☞A23
Check & Repair
RF assy
connection
☞A4
RF Receiver ver
is “00.00”?
Y
N
Check MR13/P
itself Operation
N
ose
Normal
operating?
Check & Replace
Battery of MR13/P
Normal
operating?
Replace
MR13
Y
N
Y
Press the
wheel
Close
Established
date
Is show ok
message?
Close
Is show ok
message?
Close
2013.01.31
Turn off/on the
N
set and press
the wheel
Y
N
Y
Press the back
about 5sec
ke
Down load the Firmware
* INSTART MENUÆ02.11
Remocon TestÆ3. Firmware
•If you conduct the loop at 3times, change the
MR13/P.
11
Page 73
Standard Repair Process
Wifi
operating checking
Revised date
12/16
☞
A4
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error
LCD TV
symptom
3.Wifi operating error
Check the
INSTART menu
☞A4
Wi-Fi Mac value
is “NG”?
☞A24
Check & Repair
Wifi cable
connection
D. Function error
☞A24
N
Y
Check the Wifi wafer
1pin
Established
Normal
Voltage?
Y
Close
date
2013.01.31
N
Replace
Main B/D
Wi-Fi Mac value
is “NG”?
Y
Change the Wifi
assy
N
Close
12
Page 74
Standard Repair Process
Camera operating checking
Revised date
13/16
☞
A4
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error
LCD TV
symptom
4.Camera operating error
☞A4
Check the
INSTART menu
☞A25
Check & Repair
D. Function error
Camera Ver.
is “NG”?
Y
Camera cable
connection
Established
date
2013.01.31
☞A25
N
Check the Camera wafer
P4200 2pin
Normal
Voltage?
Y
Close
N
Replace
Camera B/D
Camera Ver.
is “NG”?
Y
Change the
Camera assy
N
Close
13
Page 75
Standard Repair Process
External device recognition error
Revised date
14/16
S/WVersion
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Check
input
signal
Error
symptom
Y
Signal
input?
N
Check and fix
external device/cable
D. Function error
Check technical
information
- Fix information
-
Technical
information?
Y
Fix in
accordance
with technical
information
External Input and
N
Component
Recognition error
DVI, Optical
Recognition error
HDMI/
Established
date
2013.01.31
Replace Main B/D
Replace Main B/D
14
Page 76
Standard Repair Process
Circuit noise, mechanical noise
Revised date
15/16
noise
noise
noise
p
)
pp)
(
※
Mechanical
(y,
in “Part
”
in the O
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Identify
nose
Error
E. Noise
symptom
Circuit
Check
location of
noisetype
Mechanical
Check location of
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
related to nose
wner’s
Manual.
Replace PSU
OR
OR
Established
date
2013.01.31
※ When the nose is severe, replace the module
(For models with fix information, upgrade the
S/W or
rovide 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
Page 77
Standard Repair Process
Exterior defect
Revised date
16/16
Z
Cabinet
Replace remote controller
controller
ace stand
dent
epacestad
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Error
symptom
oom part with
exterior damage
Module
damage
damage
Remote
F. Exterior defect
Replace module
Replace cabinet
Established
date
2013.01.31
damage
Stand
Repl
16
Page 78
Contents of LCD TV Standard Repair Process Detail Technical Manual
A. Video error_ No video/Normal
A. Video error_ video error /Video
7
A.Videoerror _Vertical/Horizontalbar,
LCD TV
A6
9
Adj
J
KeyA8
Appendix
Appendix
14
ExchangeModule(2)
A
5/5
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
No.Error symptomContentPageRemarks
1
audio
2Check White Balance valueA2
4
lag/stop
5LCD-TV Version checking methodA4
6Tuner Checking PartA5
residual image, light spot
8
A. Video error_ Color error
10
11Exchange Main Board (2)A-2/5
<
12Exchange Power Board (PSU) A-3/5
13Exchange Module (1)A-4/5
Defected Type caused by T-Con/
Inverter/ Module
>
Check LCD back light with naked eyeA1
TUNER input signal strength checking
method
Check Link Cable (EPI) reconnection
condition
Exchange Main Board (1)A-1/5
connection diagram
ustment Test pattern -AD
A3
A7
-
Continue to the next page
Page 79
Contents of LCD TV Standard Repair Process Detail Technical Manual
18
POWER OFF MO
checking method
A19
18whil
POWROFFMOcheckingmethod
A19
20
Voltageandspeakercheckingmethod
A21
24
Camera operation checking method
A25
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Continued from previous page
No.Error symptomContentPageRemarks
16
Check front display LEDA17
B. Power error_ No power
17Check power input Voltage & ST-BY 3.5VA18
19
B. Power error_Off when on, off
e viewing
C. Audio error_ No audio/Normal
video
Checking method in menu when there is
no audio
DE
A20
when there is no audio
21
22
D. Function error
Remote controller operation checking
method
Motion Remote operation checking
method
A22
A23
23Wifi operation checking methodA24
25E. EtcTool option changing methodA26
Page 80
Standard Repair Process Detail Technical Manual
A1
Content
Check LCD back light with naked eye
A
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Error
symptom
A. Video error_No video/Normal audio
Established
date
Revised
date
2013.01.31
fter Remove the Rear Cover, turning on the power and disassembling the case,
check with the naked eye.
A1
Page 81
Standard Repair Process Detail Technical Manual
A2
Content
Check White Balance value
3. Aft
(GAIN, Cut)
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Error
symptom
A. Video error_No video/Normal audio
Established
date
Revised
date
2013.01.31
Entry method
Entry method
1. Press the ADJ button on the remote controller for adjustment.
1. Press the ADJ button on the remote controller for adjustment.
2. Enter into White Balance of item 6.
2. Enter into White Balance of item 9.
3. After recording the R, G, B (GAIN, Cut) value of Color Temp
er recording the R, G, B
(Cool/Medium/Warm), re-enter the value after replacing the MAIN BOARD.
(Cool/Medium/Warm), re-enter the value after replacing the MAIN BOARD.
value ofColor Temp
A2
Page 82
Standard Repair Process Detail Technical Manual
TUNER input signal strength checking method
A3
Content
attenuator
(
10dB
15dB
20dB etc.)
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Error
symptom
A. Video error_Video error, video lag/stop
Established
date
Revised
date
2013.01.31
Settings Æ Channel Æ Manual Tuning
Æ select channel
A3
When the signal is strong, use the
-
-
,
-
,
Page 83
Standard Repair Process Detail Technical Manual
LCD
Version checking method
A4
Content
t
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Error
symptom
Version
A. Video error_Video error, video lag/stop
-TV
1. Checking method for remote controller for adjustment
Established
date
Revised
date
2013.01.31
Press the IN-START with the remote
controller for adjustmen
A4
Page 84
Standard Repair Process Detail Technical Manual
TUNER checking part
A5
Content
g
ggpppy,yp
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Error
symptom
A. Video error_Video error, video lag/stop
Established
date
Revised
date
2013.01.31
Checking method:
1. Check the signal strength or check whether the screen is normal when the external device is connected.
2. After measurin
each voltage from power supply, finally replace the MAIN BOARD.
A5
Page 85
Standard Repair Process Detail Technical Manual
LCD TV
(1)
A6
Content
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Error
symptom
A. Video error _Vertical/Horizontal bar,
residual image, light spot
connection diagram
Established
date
Revised
date
2013.01.31
As the part connecting to the external input, check
the screen condition by signal
A6
Page 86
Standard Repair Process Detail Technical Manual
Check Link Cable (EPI)
diti
A7
Content
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Error
symptom
A. Video error_Color error
reconnection con
on
Established
date
Revised
date
2013.01.31
Check the contact condition of the Link Cable, especially dust or mis insertion.
A7
Page 87
Standard Repair Process Detail Technical Manual
Adjustment Test pattern
ADJ Key
A8
Content
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Error
symptom
A. Video error_Color error
-
Established
date
Revised
date
2013.01.31
You can view 6 types of patterns using the ADJ Key
Check the contact condition of or 24V connector of Main Board
② Measure the 24V input voltage supplied from Power Board
(If there is no input voltage, remove and check the connector)
③ Connect the tester RX1 to the speaker terminal and if you hear the Chik Chik sound when you touch the
GND and output terminal, the speaker is normal.
A21
Page 95
Standard Repair Process Detail Technical Manual
A22
Content
1
KEY2
5
IR
r
g
Analog Tes ter needle moves slowly, and defective when it does not move at all
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Error
symptom
Remote controller operation checking method
D. Function error
Established
date
Revised
date
2013.01.31
①
②
③
P4002
2
3
4
6
7EYE SCL
8EYE SDA
+3.5V_ST
GND
LOGO Light Wafer
GND
Checking orde
1, 2. Check Touch cable condition between Touch & Main board.
3. Check the st-by 3.5V on the terminal 4,7.
4. When checking the Pre-Amp when the power is in ON condition, it is normal when the
A22
.
Page 96
Standard Repair Process Detail Technical Manual
Moti
d
Content
A23
1+3.5V_WOL
③
5
USB_DP
9
WOL
16
GND
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Error
symptom
on Remote operation checking metho
D. Function error
Established
date
Revised
date
2013.01.31
P4003
①
②
2
3
4
6
7GND
8TX
10RESET
11GND
12CTS
13NC
14+3.5V_ST(OLED)
15IR(OLED)
17EYE_SCL
18EYE_SDA
+3.3V
USB_DM
RTS
RX
Checking order
1, 2. Check Motion cable condition between Motion assy & Main board.
3. Check the 3.3V on the terminal 2.
A23
Page 97
Standard Repair Process Detail Technical Manual
A24
Content
1+3.5V_WOL
③
5
USB_DP
9
WOL
16
GND
Checking order
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Error
symptom
Wifi operation checking method
D. Function error
Established
date
Revised
date
2013.01.31
P4003
①
②
2
3
4
6
7GND
8TX
10RESET
11GND
12CTS
13NC
14+3.5V_ST(OLED)
15IR(OLED)
17EYE_SCL
18EYE_SDA
+3.3V
USB_DM
RTS
RX
1, 2. Check Wifi cable condition between Wifi assy & Main board.
3. Check the 3.3V on the terminal 2.
A24
Page 98
Standard Repair Process Detail Technical Manual
A25
Content
1
CAM_SLIDE_DET
5
AUD_SCK
9
GND
Checking order
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Error
symptom
Camera operation checking method
D. Function error
Established
date
Revised
date
2013.01.31
P4200
①
②
2
3
4
6
7CAM_PWR_ON_CMD
8ST_BY_DET_CAM
10USB_CAMERA_DP
11USB_CAMERA_DM
12GND
+3.5V_CAM
AUD_LRCH
AUD_LRCK
GND
1, 2. Check Camera cable condition between Camera assy & Main board.
3. Check the 3.5V on the terminal 2.
A25
Page 99
Standard Repair Process Detail Technical Manual
Tool
d
A26
Content
Copyright ⓒ 2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LCD TV
Error
symptom
option changing metho
E. Etc
Established
date
Revised
date
2013.01.31
①
Changing method
1.Contact the USB memory. (USB 1,2,3 jack)
2.Enter the password. (ex. 000000)
* Access USB Memory has each password.
②
A26
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