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Internal Use Only
LED TV
SERVICE MANUAL
CHASSIS : LJ67A
MODEL : 43LH51** 43LH51**-S*
MODEL : 49LH51** 49LH51**-S*
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL69464702 (1601-REV00)
CONTENTS
CONTENTS ............................................................................................... 2
SAFETY PRECAUTIONS ......................................................................... 3
SERVICING PRECAUTIONS .................................................................... 4
SPECIFICATION........................................................................................ 6
ADJUSTMENT INSTRUCTION................................................................. 9
BLOCK DIAGRAM.................................................................................... 15
EXPLODED VIEW ................................................................................... 16
DISASSEMBLY........................................................................................ 17
TROUBLESHOOTING ...............................................................APPENDIX
.
Copyright © LG Electronics. Inc. All rights reserved. -2- LGE Internal Use Only
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
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 Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC Do not use a line Isolation Transformer during this check.
power line. Use a transformer of adequate power rating as this Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor
protects the technician from accidents resulting in personal injury between a known good earth ground (Water Pipe, Conduit, etc.)
from electrical shocks. and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
It will also protect the receiver and it's components from being with 1000 ohms/volt or more sensitivity.
damaged by accidental shorts of the circuitry that may be Reverse plug the AC cord into the AC outlet and repeat AC voltage
inadvertently introduced during the service operation. measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
If any fuse (or Fusible Resistor) in this TV receiver is blown, 0.5 mA.
replace it with the specified. In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
When replacing a high wattage resistor (Oxide Metal Film Resistor, repaired before it is returned to the customer.
over 1 W), keep the resistor 10 mm away from PCB.
Leakage Current Hot Check circuit
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.
Copyright © LG Electronics. Inc. All rights reserved. -3- LGE Internal Use Only
Only for training and service purposes
SERVICING PRECAUTIONS
CAUTION: Before servicing receivers covered by this service 2. After removing an electrical assembly equipped with ES
manual and its supplements and addenda, read and follow the devices, place the assembly on a conductive surface such as
SAFETY PRECAUTIONS on page 3 of this publication. aluminum foil, to prevent electrostatic charge buildup or expo-
NOTE: If unforeseen circumstances create conflict between the sure of the assembly.
following servicing precautions and any of the safety precautions 3. Use only a grounded-tip soldering iron to solder or unsolder ES
on page 3 of this publication, always follow the safety precautions. devices.
Remember: Safety First. 4. Use only an anti-static type solder removal device. Some solder
removal devices not classified as “anti-static” can generate
General Servicing Precautions electrical charges sufficient to damage ES devices.
1. Always unplug the receiver AC power cord from the AC power 5. Do not use freon-propelled chemicals. These can generate
source before; electrical charges sufficient to damage ES devices.
a. Removing or reinstalling any component, circuit board mod- 6. Do not remove a replacement ES device from its protective
ule or any other receiver assembly. package until immediately before you are ready to install it.
b. Disconnecting or reconnecting any receiver electrical plug or (Most replacement ES devices are packaged with leads electri-
other electrical connection. cally shorted together by conductive foam, aluminum foil or
c. Connecting a test substitute in parallel with an electrolytic comparable conductive material).
capacitor in the receiver. 7. Immediately before removing the protective material from the
CAUTION: A wrong part substitution or incorrect polarity leads of a replacement ES device, touch the protective material
installation of electrolytic capacitors may result in an explo- to the chassis or circuit assembly into which the device will be
sion hazard. installed.
2. Test high voltage only by measuring it with an appropriate CAUTION: Be sure no power is applied to the chassis or circuit,
high voltage meter or other voltage measuring device (DVM, and observe all other safety precautions.
FETVOM, etc) equipped with a suitable high voltage probe. 8. Minimize bodily motions when handling unpackaged replace-
Do not test high voltage by "drawing an arc". ment ES devices. (Otherwise harmless motion such as the
3. Do not spray chemicals on or near this receiver or any of its brushing together of your clothes fabric or the lifting of your
assemblies. foot from a carpeted floor can generate static electricity suf-
4. Unless specified otherwise in this service manual, clean ficient to damage an ES device.)
electrical contacts only by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable General Soldering Guidelines
non-abrasive applicator; 10 % (by volume) Acetone and 90 % 1. Use a grounded-tip, low-wattage soldering iron and appropriate
(by volume) isopropyl alcohol (90 % - 99 % strength) tip size and shape that will maintain tip temperature within the
CAUTION: This is a flammable mixture. range or 500 °F to 600 °F.
Unless specified otherwise in this service manual, lubrication of 2. Use an appropriate gauge of RMA resin-core solder composed
contacts in not required. of 60 parts tin/40 parts lead.
5. Do not defeat any plug/socket B+ voltage interlocks with which 3. Keep the soldering iron tip clean and well tinned.
receivers covered by this service manual might be equipped. 4. Thoroughly clean the surfaces to be soldered. Use a mall wire-
6. Do not apply AC power to this instrument and/or any of its bristle (0.5 inch, or 1.25 cm) brush with a metal handle.
electrical assemblies unless all solid-state device heat sinks are Do not use freon-propelled spray-on cleaners.
correctly installed. 5. Use the following unsoldering technique
7. Always connect the test receiver ground lead to the receiver a. Allow the soldering iron tip to reach normal temperature.
chassis ground before connecting the test receiver positive (500 °F to 600 °F)
lead. b. Heat the component lead until the solder melts.
Always remove the test receiver ground lead last. c. Quickly draw the melted solder with an anti-static, suction-
8. Use with this receiver only the test fixtures specified in this type solder removal device or with solder braid.
service manual. CAUTION: Work quickly to avoid overheating the circuit
CAUTION: Do not connect the test fixture ground strap to any board printed foil.
heat sink in this receiver. 6. Use the following soldering technique.
a. Allow the soldering iron tip to reach a normal temperature
Electrostatically Sensitive (ES) Devices (500 °F to 600 °F)
Some semiconductor (solid-state) devices can be damaged eas- b. First, hold the soldering iron tip and solder the strand against
ily by static electricity. Such components commonly are called the component lead until the solder melts.
Electrostatically Sensitive (ES) Devices. Examples of typical ES c. Quickly move the soldering iron tip to the junction of the
devices are integrated circuits and some field-effect transistors component lead and the printed circuit foil, and hold it there
and semiconductor “chip” components. The following techniques only until the solder flows onto and around both the compo-
should be used to help reduce the incidence of component dam- nent lead and the foil.
age caused by static by static electricity. CAUTION: Work quickly to avoid overheating the circuit
1. Immediately before handling any semiconductor component or board printed foil.
semiconductor-equipped assembly, drain off any electrostatic d. Closely inspect the solder area and remove any excess or
charge on your body by touching a known earth ground. Alter- splashed solder with a small wire-bristle brush.
natively, obtain and wear a commercially available discharging
wrist strap device, which should be removed to prevent poten-
tial shock reasons prior to applying power to the unit under test.
Copyright © LG Electronics. Inc. All rights reserved. -4- LGE Internal Use Only
Only for training and service purposes
IC Remove/Replacement 3. Solder the connections.
Some chassis circuit boards have slotted holes (oblong) through CAUTION: Maintain original spacing between the replaced
which the IC leads are inserted and then bent flat against the cir- component and adjacent components and the circuit board to
cuit foil. When holes are the slotted type, the following technique prevent excessive component temperatures.
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique Circuit Board Foil Repair
as outlined in paragraphs 5 and 6 above. Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
Removal board causing the foil to separate from or "lift-off" the board. The
1. Desolder and straighten each IC lead in one operation by following guidelines and procedures should be followed whenever
gently prying up on the lead with the soldering iron tip as the this condition is encountered.
solder melts.
2. Draw away the melted solder with an anti-static suction-type At IC Connections
solder removal device (or with solder braid) before removing To repair a defective copper pattern at IC connections use the
the IC. following procedure to install a jumper wire on the copper pattern
Replacement side of the circuit board. (Use this technique only on IC connec-
1. Carefully insert the replacement IC in the circuit board. tions).
2. Carefully bend each IC lead against the circuit foil pad and
solder it. 1. Carefully remove the damaged copper pattern with a sharp
3. Clean the soldered areas with a small wire-bristle brush. knife. (Remove only as much copper as absolutely necessary).
(It is not necessary to reapply acrylic coating to the areas). 2. carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
"Small-Signal" Discrete Transistor 3. Bend a small "U" in one end of a small gauge jumper wire and
Removal/Replacement carefully crimp it around the IC pin. Solder the IC connection.
1. Remove the defective transistor by clipping its leads as close 4. Route the jumper wire along the path of the out-away copper
as possible to the component body. pattern and let it overlap the previously scraped end of the
2. Bend into a "U" shape the end of each of three leads remaining good copper pattern. Solder the overlapped area and clip off
on the circuit board. any excess jumper wire.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the corresponding At Other Connections
leads extending from the circuit board and crimp the "U" with Use the following technique to repair the defective copper pattern
long nose pliers to insure metal to metal contact then solder at connections other than IC Pins. This technique involves the
each connection. installation of a jumper wire on the component side of the circuit
board.
Power Output, Transistor Device
Removal/Replacement 1. Remove the defective copper pattern with a sharp knife.
1. Heat and remove all solder from around the transistor leads. Remove at least 1/4 inch of copper, to ensure that a hazardous
2. Remove the heat sink mounting screw (if so equipped). condition will not exist if the jumper wire opens.
3. Carefully remove the transistor from the heat sink of the circuit 2. Trace along the copper pattern from both sides of the pattern
board. break and locate the nearest component that is directly con-
4. Insert new transistor in the circuit board. nected to the affected copper pattern.
5. Solder each transistor lead, and clip off excess lead. 3. Connect insulated 20-gauge jumper wire from the lead of the
6. Replace heat sink. nearest component on one side of the pattern break to the lead
of the nearest component on the other side.
Diode Removal/Replacement Carefully crimp and solder the connections.
1. Remove defective diode by clipping its leads as close as pos- CAUTION: Be sure the insulated jumper wire is dressed so the
sible to diode body. it does not touch components or sharp edges.
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.
Copyright © LG Electronics. Inc. All rights reserved. -5- LGE Internal Use Only
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 spec sheet is applied all of the LED TV with LJ67A (1) Performance: LGE TV test method followed
chassis (2) Demanded other specification
- Safety : CE, IEC specification
- EMC: CE, IEC
2. Test condition
Each part is tested as below without special notice.
(1) Temperature : 25 ºC ± 5 ºC, CST : 40 ºC±5 ºC
(2) Relative Humidity: 65 % ± 10 %
(3) Power Voltage
Standard input voltage (100~240V@ 50/60Hz)
* Standard Voltage of each products is marked by models.
(4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
(5) The receiver must be operated for about 20 minutes prior
to the adjustment.
4. Electrical Specification
No Item Specification Measurement Result Remark
1 Receiving System SBTVD / NTSC / PAL-M / PAL-N
2 Available Channel VHF : 02~13
UHF : 14~69
CATV : 01~135
3 Input Voltage AC 100 ~ 240V 50/60Hz
4 Market Central and South AMERICA
5 Screen Size 32 inch Wide (1366 × 768) 32LH510B-SC
32LH515B-SA
32LH560B-SD
32LH570B-SC
40 inch Wide (1920 × 1080) 40LH5610-SC
40LH5710-SA
43 inch Wide (1920 × 1080) 43LH5700-SF / SJ
43LH5600-SG
43LH5100-SF
49inch Wide (1920 × 1080) 49LH5700-SF / SJ
49LH5600-SG
49LH5100-SF
55 inch Wide (1920 × 1080) 55LH5700-SC
55LH5600-SG
55LH5100-SF
6 Aspect Ratio 16:9
7 Tuning System FS
8 Operating Environment Temp : 0 ~ 40 deg
Humidity : ~ 80 %
9 Storage Environment Temp : -20 ~ 60 deg
Humidity : ~ 85 %
Copyright © LG Electronics. Inc. All rights reserved. -6- LGE Internal Use Only
Only for training and service purposes
5. External Input Support Format
5.1. Component input(Y, CB/PB, CR/PR)
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock Proposed
1. 720*480 15.73 59.94 13.5 SDTV ,DVD 480I
2. 720*480 15.73 60 13.5135 SDTV ,DVD 480I
3. 720*480 31.47 59.94 27.0 SDTV 480P
4. 720*480 31.50 60 27.027 SDTV 480P
5. 1280*720 44.96 59.94 74.176 HDTV 720P
6. 1280*720 45.00 60.00 74.25 HDTV 720P
7. 1920*1080 28.125 50.00 74.250 HDTV 1080I
8. 1920*1080 33.72 59.94 74.176 HDTV 1080I
9. 1920*1080 33.75 60.00 74.25 HDTV 1080I
10. 1920*1080 26.97 23.976 74.176 HDTV 1080P
11. 1920*1080 27.000 24.000 74.25 HDTV 1080P
12. 1920*1080 33.71 29.97 74.176 HDTV 1080P
13. 1920*1080 33.75 30.000 74.25 HDTV 1080P
14. 1920*1080 56.250 50.00 148.50 HDTV 1080P
15. 1920*1080 67.432 59.939 148.352 HDTV 1080P
16. 1920*1080 67.500 60.00 148.50 HDTV 1080P
5.2. HDMI Input (PC/DTV)
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed
PC DDC
1 640*350 31.46 70.09 25.17 EGA X
2 720*400 31.46 70.08 28.32 DOS O
3 640*480 31.46 59.94 25.17 VESA(VGA) O
4 800*600 37.87 60.31 40.00 VESA(SVGA) O
5 1024*768 48.36 60.00 65.00 VESA(XGA) O
6 1152*864 54.34 60.05 80.00 VESA O
7 1360*768 47.71 60.01 85.50 VESA (WXGA) O
8 1280*1024(FHD Only) 63.98 60.02 108.00 VESA (SXGA) O
9 1920*1080(FHD Only) 67.50 60.00 148.5 HDTV 1080P O
Copyright © LG Electronics. Inc. All rights reserved. -7- LGE Internal Use Only
Only for training and service purposes
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed
DTV
1 640 * 480 31.46 59.94 25.125 SDTV 480P
2 640 * 480 31.5 60.00 25.125 SDTV 480P
3 720*480 31.47 59.94 27.000 SDTV 480I
4 720*480 31.50 60.00 27.027 SDTV 480I
5 1280*720 37.50 50.00 74.25 HDTV 720P
6 1280*720 44.96 59.94 74.176 HDTV 720P
7 1280*720 45.00 60.00 74.25 HDTV 720P
8 1920*1080 28.12 50.00 74.25 HDTV 1080I
9 1920*1080 33.72 59.94 74.176 HDTV 1080I
10 1920*1080 33.75 60.00 74.25 HDTV 1080I
11 1920*1080 26.97 23.97 74.176 HDTV 1080P
12 1920*1080 27.00 24.00 74.25 HDTV 1080P
13 1920*1080 33.71 29.97 74.176 HDTV 1080P
14 1920*1080 33.75 30.00 74.25 HDTV 1080P
15 1920*1080 56.25 50.00 148.50 HDTV 1080P
16 1920*1080 67.43 59.94 148.352 HDTV 1080P
17 1920*1080 67.5 60.00 148.50 HDTV 1080P
* DTV Resolution #6 ~ #17 : Support dual play for 3D Models
※ HDMI Monitor Range Limits
Min Vertical Freq - 58 Hz
Max Vertical Freq - 62 Hz
Min Horiz. Freq - 30 kHz
Max Horiz. Freq - 83 kHz
Pixel Clock - 160 MHz
Copyright © LG Electronics. Inc. All rights reserved. -8- LGE Internal Use Only
Only for training and service purposes
ADJUSTMENT INSTRUCTION
1. Application 3. Main PCB check process
This spec sheet is applied all of the TV with LJ67A chassis. * APC – After Manual-Insert, executing APC
* Boot file Download
(1) Execute ISP program “Mstar ISP Utility” and then click
2. Designation “Config” tab.
(1) T he adjustment is according to the order which is (2) Set as below, and then click “Auto Detect” and check “OK”
designated and which must be followed, according to the message.
plan whic al Unit: Product Specification Standard. I f “Error” is displayed, Check connection between
(2) Power adjustment : Free Voltage. computer, jig, and set.
(3) Magnetic Field Condition: Nil. (3) Click “Read” tab, and then load download file (XXXX.bin)
(4) Input signal Unit: Product Specification Standard. by clicking “Read”
(5) Reserve after operation: Above 5 Minutes (Heat Run).
Temperature : at 25 ºC ± 5 ºC (1)
Relative humidity : 65 % ± 10 %
Input voltage : 100 V ~ 220 V, 50 / 60Hz
filexxx.bin
(6) A djustment equipments : 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
(4) C lick “Connect” tab. If “Can’t ” is displayed, Check
(2) Push “In-stop” key
connection between computer, jig, and set.
(3) Push “Power on” key
(4) Function inspection
(2) (3)
(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.
Please Check the Speed :
To use speed between
from 200KHz to 400KHz
(5) Click “Auto” tab and set as below.
(6) Click “Run”.
(7) After downloading, check “OK” message.
(4)
filexxx.bin
(5)
(7)...........OK
(6)
Copyright © LG Electronics. Inc. All rights reserved. -9- LGE Internal Use Only
Only for training and service purposes
* USB DOWNLOAD(*.epk file download) 4. Total Assembly line process
(1) Put the USB Stick to the USB socket.
(2) Automatically detecting update file in USB Stick.
4.1. Adjustment Preparation
▪ W/B Equipment condition
- If your downloaded program version in USB Stick is Low,
CA210 : LED -> CH14, Test signal: Inner pattern(80IRE)
it didn't work. But your downloaded version is High, USB
▪ Above 5 minutes H/run in the inner pattern. (“power on” key
data is automatically detecting
of adjust remote control)
(3) Show the message "Copying files from memory"
▪ The spec of color temperature and coordinate.
Temperature : 20 ºC ± 5 ºC
Heat run mode : Vivid
Measurement mode : Adjust > White Balance mode
Measurement Point : center
Measurement Device : CA-210 / CA-310
Heat run time : continue 24 hours(for new-born module)
(4) Updating is staring.
2 hours(for module UTT is over 24 hrs)
▪ CA210 : CH 14, Test signal : Inner pattern (80IRE)
- Standard color coordinate and temperature using CA-1000
(by H/R time)
C o l o r Color Coordinate
Mode Remark
Temp Min Typ Max
Cool X 0.251 0.271 0.291 ** The W/B Tolerance is
13,000 k ±0.015 for picture quality
(5) After updating is complete, The TV will restart automatically. Y 0.240 0.270 0.300
by DQA.
(6) If TV turns on, check your updated version and Tool option. Medium X 0.266 0.286 0.306 (1) Video input: 204 Gray
(refer to the next page about tool option) 9,300 k
Y 0.259 0.289 0.319 (85% of full white pattern)
* If downloading version is higher than your TV have, TV X 0.293 0.313 0.333 (2) Backlight UI setting
can lost all channel data. In this case, you have to - Cool (100), Medium
channel recover. If all channel data is cleared, you didn't (100), Warm (100)
Warm 6,500 k
have a DTV/ATV test on production line. Y 0.299 0.329 0.359 (3) Color temp UI setting
- Warm (W50), Medium (0),
Cool (C50)
* A fter downloading, have to adjust Tool - Color coordinate x, y ± 0.015 (after 24 hours aging)
- Color coordinate x ± 0.020, y ± 0.030 (within 24 hours aging)
Option again.
(1) Push "IN-START" key in service remote controller.
(1) Normal line (From January to December)) : LGD
(2) Select "Tool Option 1" and Push "OK" button.
(3) Punch in the number. (Each model has their number.) Cool Medium Warm
(4) Completed selecting Tool option. Aging time
X Y X Y X Y
(Min)
* RS-232C Connection Method 271 270 286 289 313 329
Connection : P CBA (USB Port) -> USB to Serial Adapter 1 0-2 282 289 297 308 324 348
(UC-232A) -> RS-232C cable -> PC(RS-232C
2 3-5 281 287 296 306 323 346
port)
▪ Product name of USB to Serial Adapter is UC-232A. 3 6-9 279 284 294 303 321 343
(Caution) LJ67A chassis support only UC-232A driver. (only 4 10-19 277 280 292 299 319 339
use this one. )
5 20-35 275 277 290 296 317 336
6 36-49 274 274 289 293 316 333
7 50-79 273 272 288 291 315 331
8 80-119 272 271 287 290 314 330
9 Over 120 271 270 286 289 313 329
▪ AUO, INX, Sharp, CSOT, BOE Module.( In the case of , the
color temperature spec of cool mode is 13000K)
Cool Medium Warm
x y x y x y
spec 271 270 286 289 313 329
target 278 280 293 299 320 339
Copyright © LG Electronics. Inc. All rights reserved. - 10 - LGE Internal Use Only
Only for training and service purposes
* Connecting picture of the measuring instrument * Manual W/B process using djust Remote control.
(On Automatic control) ▪ C olor analyzer(CA100+, CA210) should be used in the
Inside PATTERN is used when W/B is controlled. Connect to calibrated ch by CS-1000
auto controller or push Adjustment R/C POWER-ON -> Enter ▪ Operate the zero-calibration of the CA100+ or CA-210, then
the mode of White-Balance, the pattern will come out. stick sensor to the module when adjusting.
▪ After enter Service Mode by pushing “ADJ” key,
▪ E nter White Balance by pushing “►” key at “8. White
Balance”.
Full White Pattern CA-210
COLOR
ANALYZER
TYPE : CA-210
RS-232C Communication
* Auto-control interface and directions
(1) Adjust in the place where the influx of light like floodlight
around is blocked. (Illumination is less than 10ux).
(2) Adhere closely the Color Analyzer ( CA210 ) to the module
less than 10cm distance, keep it with the surface of the
Module and Color Analyzer’s Prove vertically.(80~100°).
(3) Aging time
- After aging start, keep the power on (no suspension of ■ For manual adjustment, it is also possible by the following
power supply) and heat-run over 5 minutes. sequence.
- Using ‘no signal’ or ‘full white pattern’ or the others, check (1) Set TV in Adj. mode using POWER ON
the back light on. (2) Zero Calibrate the probe of Color Analyzer, then place it on
the center of LCD module within 10cm of the surface
▪ Auto adjustment Map(RS-232C) (3) Press ADJ key -> EZ adjust using adj. R/C -> 8. White-
RS-232C COMMAND Balance then press the cursor to the right (KEY►). When
[CMD ID DATA] KEY(►) is pressed 206 Gray internal pattern will be
Wb 00 00 White Balance Start displayed.
Wb 00 ff White Balance End (4) Adjust Cool modes
RS-232C 1) Fix the one of R/G/B gain to 192 (default data) and
CENTER decrease the others
COMMAND
MIN (DEFAULT) MAX (If G gain is adjusted over 172 and R and B gain less
[CMD ID DATA]
Cool Mid Warm Cool Mid Warm
than 192, increase G gain to 192 and increase R gain
and B gain same amount of increasing G gain.)
LH51
/54
LH51
LH57
2) If G gain is less than 172,
/54 Increase G gain by up to 172, and then increase R gain
/57
and G gain same amount of increasing G gain.
R Gain jg Ja jd 00 172 192 192 192 192
3) If R gain or B gain is over 255,
G Gain jh Jb je 00 172 192 192 160 192 Readjust G gain less than 172, Conform to R gain is 255
B Gain ji Jc jf 00 192 192 172 128 192 or B gain is 255
R Cut 64 64 64 64 128 (5) Adjust two modes (Medium / Warm) Fix the one of R/G/B
gain to 192 (default data) and decrease the others.
G Cut 64 64 64 64 128
(6) Adj. is completed, Exit adjust mode using “EXIT” key on
B Cut 64 64 64 64 128 Remote controller.
▪ If internal pattern is not available, use RF input. In EZ Adj.
menu 8. White Balance, you can select one of 2 Test-pattern:
ON, OFF. Default is inner (ON). By selecting OFF, you can
adjust using RF signal in 206 Gray pattern.
Copyright © LG Electronics. Inc. All rights reserved. - 11 - LGE Internal Use Only
Only for training and service purposes
First adjust the coordinate far away from the target value(x, y). 4.2. EDID DATA
(1) x, y > target (1) All Data : HEXA Value
1) Decrease the R, G. (2) Changeable Data :
(2) x, y < target 1) Serial No : Controlled / Data:01
1) First decrease the B gain, 2) Month : Controlled / Data:00
2) Decrease the one of the others. 3) Year : Controlled
(3) x > target , y< target 4) Check sum
1) First decrease B, so make y a little more than the target.
2) Adjust x value by decreasing the R - Auto Download
(4) x < target , y >target ■ After enter Service Mode by pushing “ADJ” key,
1) First decrease B, so make x a little more than the target. ■ Enter EDID D/L mode.
2) Adjust x value by decreasing the G ■ Enter “START” by pushing “OK” key.
How to adjust
(1) If G gain is adjusted over 172 and R gain and B gain less
than 192 , Adjust is O.K.
(2) If G gain is less than 172 , increase G gain by up to 172,
and then increase R gain and B gain same amount of
increasing G gain.
(3) If R gain or B gain is over 255 , Readjust G gain less than
172, Conform to R gain is 255 or B gain is 255
* CASE Medium / Warm
First adjust the coordinate far away from the target value(x, y).
(1) x, y > target
1) Decrease the R, G.
(2) x, y < target
1) First decrease the B gain,
2) Decrease the one of the others.
(3) x > target , y< target
1) First decrease B, so make y a little more than the target. * Edid data and Model option download (RS232)
2) Adjust x value by decreasing the R NO Item CMD 1 CMD 2 Data 0
(4) x < target , y >target Enter
1) First decrease B, so make x a little more than the target. Download When transfer the ‘Mode
download A A 0 0
‘Mode In’ In’, Carry the command.
2) Adjust x value by decreasing the G MODE
EDID data and Automatically download
Model option Download A E 00 10 (The use of a internal Data)
▪ After You finish all adjustments, Press “In-start” button and
Download
compare Tool option and Area option value with its BOM, if it
is correctly same then unplug the AC cable. If it is not same, * In Cast of HD Model (TBD), EDID C/S changed from SW ver
then correct it same with BOM and unplug AC cable. For 3.03.02. (For more detail, see the table below)
correct it to the model’s module from factory JIG model.
▪ P ush the “IN STOP KEY” after completing the function
inspection.
Copyright © LG Electronics. Inc. All rights reserved. - 12 - LGE Internal Use Only
Only for training and service purposes
■ EDID DATA (3) Simple Smart HD DTS EDID Data (32LH56 / 32LH57)
(1) L16 HD 2D AC3 EDID Data (32LH510B) CheckSum(0xFF) Physical Address (0x1E)
CheckSum Physical Address HDMI 1 73 / E2 10
Remark
(0xFF) (0x1E)
HDMI 2 73 / D2 20
HDMI 1 73 / 5B 10 LF51 : Only HDMI1
- HDMI1/2 (128)
- HDMI1/2 (128)
- HDMI1 (256)
- HDMI1 (256)
- HDMI2 (256)
(2) L16 FHD 2D AC3 EDID Data (43/49/55LH51)
CheckSum Physical Address
Remark
(0xFF) (0x1E)
HDMI 1 3F / 25 10 LF51 : Only HDMI1
- HDMI1/2 (128)
(4) Simple Smart FHD DTS EDID Data
(43/49/55LH56 / LH57)
CheckSum(0xFF) Physical Address (0x1E)
HDMI 1 3F / 1B 10
HDMI 2 3F / 0B 20
- HDMI1/2 (128)
- HDMI1 (256)
Copyright © LG Electronics. Inc. All rights reserved. - 13 - LGE Internal Use Only
Only for training and service purposes
- HDMI1 (256) 4.4. GND & Hi-pot test
4.4.1. GND & HI-POT auto-check preparation
(1) Check the POWER CABLE and SIGNAL CABE insertion
condition
4.4.2. GND & HI-POT auto-check
(1) Pallet moves in the station. (POWER CORD / AV CORD is
tightly inserted)
(2) Connect the AV JACK Tester.
(3) Controller (GWS103-4) on.
- HDMI2 (256) (4) GND Test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, execute next process (Hi-pot test).
(Remove A/V CORD from A/V JACK BOX)
(5) HI-POT test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, GOOD Lamp on and move to next
process automatically.
4.4.3. Checkpoint
(1) Test voltage
1) 3 Poles
- GND: 1.5KV/min at 100mA
4.3. Outgoing condition Configuration - SIGNAL: 3KV/min at 100mA
■ When pressing IN-STOP key by SVC remocon, Red LED 2) 2 Poles
are blinked alternatively. And then automatically turn off. - SIGNAL: 3KV/min at 100mA
(Must not AC power OFF during blinking) (2) TEST time: 1 second
(3) TEST POINT
1) 3 Poles
- GND Test = POWER CORD GND and SIGNAL CABLE
GND.
- H i-pot Test = POWER CORD GND and LIVE &
NEUTRAL.
2) 2 Poles
- Hi-pot Test = Accessible Metal and LIVE & NEUTRAL.
(4) LEAKAGE CURRENT: At 0.5mArms
Copyright © LG Electronics. Inc. All rights reserved. - 14 - LGE Internal Use Only
Only for training and service purposes
Copyright ©
SPI_SCK/SDI/SDO/CS Serial Flash
(IC1300, 8Mbit)
Only for training and service purposes
Tuner
(TU3701)
I2C_SCL/SDA System EEPROM
H/NIM
TU_SCL / SDA (IC104, 256Kbit)
IF_AGC
IF_N/P
X-tal
24MHZ
LG Electronics. Inc. All rights reserved.
B-MDQL[0-7], B-MDQU[0-7],…
DDR(256MB)
REAR
CK+/-, D0+/-, D1+/-, D2+/-_HDMI2
HDMI1 Main SOC
(JK801) DDC_SCL/SDA_2, HDMI_CEC
AUD_MASTER_CLK,
M1A-LGE2135 AUD_LRCH, SPK_L
AUD_LRCK, AUD_SCK
- 15 -
(IC101, DDR3 128MB) NTP7515
AMP_SCL/SDA
(IC5600)
DM/DP SPK_R
USB OCP
(JK700) +5V_USB USB1_OCP/CTL
SN1406035RGER
KEY, LED_R, IR Connector
(P4600)
BLOCK DIAGRAM
(P1800)
(P1801)
COMPONENT/AV1 COMP2_Y+/Pb+/Pr+/L_R_IN or AV_CVBS_IN/L_R_IN
(JK2802)
RXA0+/-~RXA4+/-, RXACK+/-
RXB0+/-~RXB4+/-, RXBCK+/-
30P HD LVDS wafer
51P FHD LVDS wafer
LGE Internal Use Only
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 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.
400
901
LV1
540
902
800
120
720
200
700
Set + Stand
500
A10
A2
Copyright © LG Electronics. Inc. All rights reserved. - 16 - LGE Internal Use Only
Only for training and service purposes
DISASSEMBLY
1. Disassembly of Back cover
(1) Remove screw in the set (5) Open B/C with push/pulling long nose to upper and lower
sides.
(2) Check both right/left hole (6) Disassemble Back cover
(3) Attach tape to ‘Long nose pliers’ * Disassemble it from left to right for top side hook on Back
cover
▶ Tool spec
- Long nose pliers
- Needle nose pliers
: M3*5.5 1EA
: M4*10 4EA(Taptite)
W < 4.0mm
: M3*10 5EA(Taptite)
w
*SCREW TORQUE :
SCREW : 4 ~ 6Kgf.cm
(4) Put ‘long nose’ into the hole SCREW : 5 ~ 7Kgf.cm
t< 3.0mm
t
SCREW : 5 ~ 7Kgf.cm
Copyright © LG Electronics. Inc. All rights reserved. - 17 - LGE Internal Use Only
Only for training and service purposes
TROUBLE SHOOTING GUIDE
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Contents of Standard Repair Process
* First of all, Check whether there is SVC Bulletin in GCSC System for these model.
No. Error symptom (High category) Error symptom (Mid category) Page Remarks
1 No video/Normal audio 1
2 No video/No audio 2
3 Tuning fail, Picture broken/ Freezing 3, 4
A. Video error
4 Color error 5
Vertical/Horizontal bar, residual image, light spot,
5 6
external device color error
6 No power 7
B. Power error
7 Off when on, off while viewing, power auto on/off 8
8 No audio/Normal video 9
C. Audio error
9 Wrecked audio/discontinuation/noise 10
10 Remote control & Local switch checking 11
D. Function error
11 External device recognition error 12
12 E. Noise Circuit noise, mechanical noise 13
13 F. Exterior error Exterior defect 14
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process
Error Symptom A. Video Error Established date
1/14
Content No video / Normal audio Revised date
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D ↔ Adaptor, LVDS Cable, Speaker Cable, IR B/D Cable…)
☞A1 ☞A4
Y Y Y
No video Normal Check Back Light Check LVDS 12 V Normal Replace T-con B/D
Normal audio On with naked eye On of Main B/D or Module
Audio Voltage
N N N
☞A2
Move to Check Main B/D to LED Back light Voltage Replace Main
No video/No audio B/D or Repair parts
Y
Normal Replace Module
Voltage
N
Replace Main
B/D or Repair parts
※Precaution ☞A3 & A6
Always check & record S/W Version and White
Replace Main Board Re-enter White Balance value
Balance value before replacing the Main Board
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process
Error Symptom A. Video Error Established date
2/14
Content No video / No audio Revised date
☞A13
No video / Check voltage 19V Normal Y Replace Main
No audio of Adaptor Voltage B/D or Repair parts
N
Replace Adaptor
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process
Error Symptom A. Video Error Established date
3/14
Content Tuning fail, Picture broken/freezing Revised date
. By using Digital signal level meter
☞ A5
. By using Diagnostics menu on OSD
Check RF Signal level ( Menu → Customer Support(red button on remote control) → Signal Test )
- Signal strength (Normal : over 50%)
- Signal quality (Normal : over 50%)
Y Check whether other equipments have problem or not.
Normal
(By connecting RF Cable at other equipment)
Signal
→ DVD Player ,Set-Top-Box, Different maker TV etc`
N
☞ A6
Check RF Cable
Normal Y Check SVC N Check Normal Y
Connection End
1. Reconnection Picture S/W Version Bulletin Tuner soldering Picture
2. Install Booster
N Y N
N S/W Upgrade Replace
Normal Contact with signal distributor
Picture or broadcaster (Cable or Air) Main B/D
Y
Normal N
Picture
End
Y
End
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process
Error Symptom A. Video Error Established date
4/14
Content Tuning fail, Picture broken/freezing Revised date
☞ A5 Check RF signal cable (DVB satellite signal or not)
Check whether other equipments have problem or not.
Check RF Signal level
(By connecting RF Cable at other equipment)
→ Set-Top-Box, Different maker TV etc
Check satellite setting. ☞ A6
- Check LNB frequency
Normal Y Normal Y Check SVC N Check Replace
- Check satellite
Signal Setting S/W Version Bulletin Tuner soldering Main B/D
- Check Satellite connection
(DiSEqC, motor, etc…) Y
N N
Contact with signal Replace satellite setting S/W Upgrade
distributor (match with installed ANT)
or broadcaster
(Cable or Air)
N Normal N
Normal
Picture Picture
Y Y
End End
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process
Error Symptom A. Video Error Established date
5/14
Content Color error Revised date
☞ A8 / A9
☞A7 Check and
replace Link Y Y
Check color by input Y
Color Cable Color Color
- External Input Replace Main B/D Replace module
error (LVDS) and error error
(COMPONENT/AV/HDMI)
contact
N N N
condition
Check error End
color input
mode
External
☞A10 Input External
Check external Y
Compon device/
Check Test pattern device and Replace Main B/D
ent, Cable
cable
HDMI Normal
error N
Request repair
for external
device/cable
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process
Error Symptom A. Video Error Established date
Vertical/Horizontal bar, Residual Image, 6/14
Content Revised date
Light spot, External device Color error
Vertical/Horizontal bar, residual image, light spot Replace
Module
☞A7 ☞ A8/ A9 N
Check external
Check color condition by input Y Y Check and
Screen device Screen Screen N Screen
- External Input replace Link Replace Main B/D
normal connection normal normal normal
(Component/AV/HDMI) Cable
condition
N N Y Y
☞A10 Replace Request repair End End
Module for external
Check Test pattern
device
External device screen error-Color error Connect other external
Check screen device and cable
Y condition by input External Y (Check normal operation of N
Check Screen Replace
Check S/W Version -External Input Input External Input, Component
Version normal Main B/D
(Component/AV/ error and HDMI by connecting
HDMI) N Jig, pattern Generator,
N Y
Set-top Box etc.
S/W Upgrade
End Request repair for
external device
Normal N
Screen
Y
End
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process
Error Symptom B. Power Error Established date
7/14
Content No power Revised date
☞A11
DC Power on Normal N
Check Power Y Replace
by pressing Power Key Operati
Power LED LED On Main B/D
On Remote control on
Stand-By : Red N Y
Check Adaptor/ End
Power cord
was inserted properly
Power Y
LED On
※
N Y
☞A16
Normal
Check ST-BY 3.5V
Voltage
N
Replace Adaptor or
Replace Main B/D
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process
Error Symptom B. Power Error Established date
8/14
Content Off when on/off while viewing, power auto on/off Revised date
☞A14
N Y CPU Y
Check outlet Adaptor Check Power Off
Error Abnorm Replace Main B/D Normal End
or A/C cord DC Out Mode
al
Y N
N
Abnorm
al1 Replace Adaptor
☞A13
Fix A/C cord & Outlet Replace
Adaptor (If Power Off mode
is not displayed) Normal Y
Replace Main B/D
Check Adaptor Voltage
voltage
N
Replace Adaptor
* Please refer to the all cases which Status Power off List Explanation
can be displayed on power off mode. "POWEROFF_REMOTEKEY" Power off by REMOTE CONTROL
"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
Normal "POWEROFF_ONTIMER" Power off by ON TIMER
"POWEROFF_RS232C" Power off by RS232C
"POWEROFF_RESREC" Power off by Reservated Record
"POWEROFF_RECEND" Power off by End of Recording
"POWEROFF_SWDOWN" Power off by S/W Download
"POWEROFF_UNKNOWN" Power off by unknown status except listed case
"POWEROFF_ABNORMAL1" Power off by abnormal status except CPU trouble
Abnormal
"POWEROFF_CPUABNORMAL" Power off by CPU Abnormal LGE Internal Use Only
Copyright © 2016 LG Electronics Inc. All rights reserved.
Only for training and service purposes
Standard Repair Process
Error Symptom C. Audio Error Established date
9/14
Content No audio / Normal video Revised date
☞A15
Check user
Y
No audio Connection Connec Replace Speaker
Screen normal from Main tion or Main B/D
Speaker Cable
N
Insert wafer SPK Cable
Normal N
Audio
Y
End
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process
Error Symptom C. Audio Error Established date
10/14
Content Wrecked audio / Discontinuation / Noise Revised date
Check input ☞A13
Y Wrecked Audio/ Check and replace
signal Signal Check Voltage 19V
Discontinuation/ speaker and
-RF Normal of Adaptor
Noise for all audio connector
-External Input
N
Wrecked Audio/ Y
Normal
Discontinuation/ Replace Main B/D
Voltage
Noise only for D-TV
N
Wrecked Audio/
Discontinuation/ Replace Adaptor
Noise only for Analog
Wrecked Audio/
Connect and check
Discontinuation/
other external Replace Main B/D End
Noise only for
device
External Input
(When RF signal is not
received) N
Normal
Request repair to external Audio
cable/ANT provider
Y
(In case of
External Input
signal error) Check and fix external device
Check and fix
external device
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process
Error Symptom D. Function Error Established date
11/14
Content Remote control & Local switch checking Revised date
Replace
Main B/D
☞A16 Y
☞A16 ☞A16
Y Check & Repair N
Check R/C itself Normal Normal Check 3.5V Normal Y Check IR Normal
Cable connection
Operation Operating Operating On Main B/D Voltage Output signal Signal
Connector solder
N Y N N
☞A13
End Check Voltage 19V of Adaptor Replace
Check R/C Operating Check & Replace IR B/D
When turn off light Baterry of R/C
in room
If R/C operate,
Explain the customer Y
Normal
cause is interference End
Operating
from light in room.
N
Replace R/C
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process
Error Symptom D. Function Error Established date
12/14
Content External device recognition error Revised date
Check technical
Y N External Input and
Check input Signal information Technical
Component Replace Main B/D
signal Input - Fix information information
Recognition error
- S/W Version
N Y
Fix in
Check and fix accordance HDMI
external device/cable with technical Recognition error
information
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process
Error Symptom E. Noise Established date
13/14
Content Circuit noise, Mechanical noise Revised date
Identify Circuit Check location
Replace Main Board
nose type noise of noise
Mechanical Check location
noise of noise
※ Mechanical noise is a natural ※ When the nose is severe, replace the module
phenomenon and apply the 1st level (For models with fix information, upgrade the S/W or
description. provide the description)
When the customer does not agree, apply or
the process by stage. ※ If there is a “Tak Tak” noise from the cabinet, refer
※ Describe the basis of the description in to the KMS fix information and then proceed as
“Part related to nose” in the Owner’s Manual. shown in the solution manual
(For models without any fix information, provide the
description)
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process
Error Symptom F. Exterior Defect Established date
14/14
Content Exterior defect Revised date
Zoom part with Module
Replace module
exterior damage damage
Cabinet
Replace cabinet
damage
Remote
Controller Replace remote controller
damage
Stand
Replace stand
damage
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Contents of Standard Repair Process Detail Technical Manual
* First of all, Check whether there is SVC Bulletin in GCSC System for these model.
No. Error symptom Content Page Remarks
1 Check LCD back light with naked eye A1
2 LED driver B+ measuring method A2
A. Video error_ No video/Normal audio
3 Check White Balance value A3
4 Power voltage measuring method A4
5 TUNER input signal strength checking method A5
A. Video error_ No video/Video lag/stop
6 Version checking method A6
7 Connection diagram A7
8 A8
A. Video error_Color error Check Link Cable (LVDS) reconnection condition
9 A9
10 Adjustment Test pattern - ADJ Key A10
11 Connection diagram A8
A. Video error_Vertical/Horizontal bar, A8
12 Check Link Cable (LVDS) reconnection condition
residual image, light spot A9
13 Adjustment Test pattern - ADJ Key A10
14 Exchange T-Con Board (1) A-1/5
15 Exchange T-Con Board (2) A-2/5
16 Defected Type caused by T-Con/ Inverter/ Exchange LED driver Board (PSU) A-3/5
Module
17 Exchange Module itself (1) A-4/5
18 Exchange Module itself (2) A-5/5
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Contents of Standard Repair Process Detail Technical Manual
* First of all, Check whether there is SVC Bulletin in GCSC System for these model.
No. Error symptom Content Page Remarks
19 Check front display LED A11
20 Check power input Voltage & ST-BY 3.5V A12
B. Power error_No power
21 Checking method when power is ON A13
22 Power voltage measuring method A4
B. Power error_Off when on, off while
23 POWER OFF MODE checking method A14
viewing
24 C. Audio error_No audio/Normal video Checking method in menu when there is no audio A15
D. Function error_ No response in remote
25 Remote controller operation checking method A16
controller, key error
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process Detail Technical Manual
Error Symptom A. Video Error, No Video/Normal Audio Established date
A1
Content Check Back Light On with Naked eye Revised date
Power On -> disjoint back case -> check lighting
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process Detail Technical Manual
Error Symptom A. Video Error, No Video/Normal Audio Established date
A2
Content Main Board to LED back light Voltage Revised date
Measure DC Voltage applying to LED backlight from Main B/D
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process Detail Technical Manual
Error Symptom A. Video Error, No Video/Normal Audio Established date
A3
Content Check White Balance value Revised date
1. Press the ADJ button on the remote controller for adjustment
2. Enter into White Balance of item 9
3. After recording the R, G, B (GAIN, Cut) value of Color Temp (Cool/Medium/Warm),
re-enter the value after replacing the MAIN BOARD
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process Detail Technical Manual
Error Symptom A. Video Error, No Video/Normal Audio Established date
A4
Content Power Voltage Measuring Method Revised date
HD Model : 27 ~ 30 pin FHD Model : 48 ~ 51 pin
Check LVDS 12V
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process Detail Technical Manual
Error Symptom A. Video Error, Video lag/stop Established date
A5
Content Tuner Input Signal Strength Checking Method Revised date
MENU Press red key Remote controller signal test
Select channel
When the signal is strong, use the
attenuator (-10dB, -15dB, -20dB etc.)
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process Detail Technical Manual
Error Symptom A. Video Error, No Video/Normal Audio Established date
A6
Content LCD-TV Version Checking Method Revised date
Checking SW version method for remote controller for adjustment
Press the IN-START with the remote
controller for adjustment
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process Detail Technical Manual
A. Video Error, Vertical/Horizontal bar, Residual Image,
Error Symptom Established date
Light spot A7
Content LCD TV connection diagram Revised date
As the part connecting to the external input, check the
screen condition by signal
* Jack spec. : depending on Model
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process Detail Technical Manual
Error Symptom A. Video Error, Color Error Established date A8/
Content Check and replace Link Cable(LVDS) and contact condition Revised date A9
1. Check and replace LVDS Cable
2. Check LVDS connection condition
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process Detail Technical Manual
Error Symptom A. Video Error, Color Error Established date
A10
Content Adjustment Test Pattern – ADJ Key Revised date
You can view 6 types of patterns using the ADJ Key
Checking item : 1. Defective pixel 2. Residual image 3. MODULE error (ADD-BAR,SCAN BAR..)
4.Video error (Classification of MODULE or Main-B/D)
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Appendix : Exchange T-Con Board (1)
Solder defect, CNT Broken Solder defect, CNT Broken Solder defect, CNT Broken
Solder defect, CNT Broken T-Con
T-Con Defect,
Defect,
Solder
T-Con CNT
defect,
Defect, CNT
CNT
CNT Broken
Broken
Broken
Broken Abnormal Power Section
Solder defect, Short/Crack Abnormal Power Section Solder defect, Short/Crack
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Appendix : Exchange T-Con Board (2)
Abnormal Power Section Abnormal Power Section Solder defect, Short/Crack
Solder defect, Short/Crack Fuse Open, Abnormal power section Abnormal Display
GRADATION Noise GRADATION
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Appendix : Exchange the Module (1)
Press damage Press damage Press damage
Un-repairable Cases
In this case please exchange the module.
Crosstalk Crosstalk
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Appendix : Exchange the Module (2)
Vertical Block Vertical Line Vertical Block
Source TAB IC Defect Source TAB IC Defect Source TAB IC Defect
Horizontal Block Horizontal Block Horizontal line
Gate TAB IC Defect Gate TAB IC Defect
Gate TAB IC Defect Gate TAB IC Defect Gate TAB IC Defect
Un-repairable Cases
In this case please exchange the module.
Horizontal Block
Gate TAB IC Defect
Gate TAB IC Defect
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process Detail Technical Manual
Error Symptom B. Power Error, No Power Established date
A11
Content Check front Display LED Revised date
ST-BY condition: Red
Front LED control :
Menu Option Standby Light On/Off
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process Detail Technical Manual
Error Symptom B. Power Error, No Power Established date A12/
Content Checking Method When Power is ON Revised date A13
Check Voltage 19V of Adaptor Power
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process Detail Technical Manual
Error Symptom B. Power Error, Off when on, off whiling viewing Established date
A14
Content Power off Mode checking method Revised date
1. Press the IN-START button of the remote controller for adjustment
2. Check the entry into adjustment item 3
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process Detail Technical Manual
Error Symptom C. Audio Error, No Audio/Normal Video Established date
A15
Content Checking method in menu when there is no audio Revised date
Check Connection from Main B/D to Speaker
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
Standard Repair Process Detail Technical Manual
Error Symptom D. Function Error, No Response in remote controller, Key error Established date
A16
Content Remote controller operation checking method Revised date
P4600
1 KEY2
③ 2 3.5V_ST
3 GND
4 LED_R/BUZZ
④ 5 IR
6 GND
②
① < Sub Ass’y>
< Main Ass’y>
1, 2. Check IR cable condition between IR & Main board
3. Check the ST-BY 3.5V on the terminal 4
4. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog
Tester needle moves slowly, and defective when it does not move at all.
Copyright © 2016 LG Electronics Inc. All rights reserved. LGE Internal Use Only
Only for training and service purposes
