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 shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,
replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1 W), keep the resistor 10 mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical
shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1 MΩ and 5.2 MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check(See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5 mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
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 spec sheet is applied all of the LED TV with LT55H
chassis.
2. Designation
(1) The adjustment is according to the order which 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).
Temperature : at 25 ºC±5
Relative humidity : 65 ± 10%
Input voltage : 100~220V, 50/60Hz
(6) Adjustment 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
(1) Put the USB Stick to the USB socket.
(2) Automatically detecting update file in USB Stick.
- If your downloaded program version in USB Stick is Low,
it didn't work. But your downloaded version is High, USB
data is automatically detecting
(3) Show the message "Copying files from memory"
(4) Updating is staring.
* 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 model has their number.)
(4) Completed selecting Tool option.
Tool
Tool
Tool
Tool
Tool
ModelModule
43LF540T-DBLGD46212233904364489218273
49LF540T-DBLGD46012233904364489218273
32LF550D-DDLGD32807112640323644813826273
32LF565D-DELGD 32775317440323644813826273
55LF565T-DELGD32784
60LF565T-DESharp11281317440323644812802273
40LF570T-DAINX34186317440323644812802273
42LF620T-DDLGD32875317481285283213826353
49LF620T-DDLGD32878317481285283213826353
55LF620T-DDLGD32880317481285283213826353
43LF5400-DALGD46012233904363849218273
49LF5400-DALGD46212233904363849218273
32LF565B-DELGD 32775317440323638413826273
50LF5650-DELGD32783317440323638413826273
55LF5650-DELGD32784
60LF5650-DESharp11281317440323638412802273
40LF5700-DAINX34186317440323638412802273
43LF5700-DALGD33164317439043638413826273
option1
CSOT39952
CSOT39952
option2
option3
option4
option5
317440323644813826273
317440323638413826273
Tool
option6
(5) After updating is complete, The TV will restart automatically.
(6) If TV turns on, check your updated version and Tool option.
(refer to the next page about tool option)
* If downloading version is higher than your TV have, TV
can lost all channel data. In this case, you have to
channel recover. If all channel data is cleared, you didn't
have a DTV/ATV test on production line.
* RS-232C Connection Method
Connection : PCBA (USB Port) -> USB to Serial Adapter
(UC-232A) -> RS-232C cable -> PC(RS-232C port)
▪ Product name of USB to Serial Adapter is UC-232A.
※ Caution: LT55H chassis support only UC-232A driver. (only
CA210 : CH14, Test signal : Inner pattern (80IRE) – in case of
LED back light
■ Above 5 minutes H/run in the inner pattern. (“power on” key of
adjust remote control)
► The spec of color temperature and coordinate
ModelModeColor TempColor coordinateRemark
Cool (C50)13,000k
Medium (0)9,300k
All
Warm (W50)6,500k
x = 0.271 (±0.002)
y = 0.270 (±0.002)
x = 0.286 (±0.002)
y = 0.289 (±0.002)
x = 0.313 (±0.002)
y = 0.329 (±0.002)
► CA210 : CH 14, Test signal : Inner pattern (80IRE)
- Standard color coordinate and temperature using CA-1000 (by
H/R time)
▪ L15 LGD, INX Module
March to December & Global
Normal line (LF55/56/57/62)
CoolMediumWarm
H/R Time(Min)
10-2282 289 297308324348
23-5281 287 296306323346
36-9279 284 294303321343
410-19277 280 292299319339
520-35275 277 290296317336
636-49274 274 289293316333
750-79273 272 288291315331
880-119272 271 287290314330
9Over 120271 270 286289313329
xyxxyx
271270286289313329
※ Test signal
- Inner pattern for W/B adjust
- External white pattern
(80IRE, 204gray)
※ W/B luminance Spec
Min 60↑
(Only 43/49LF54XX-XX)
▪ Gumi Winter table(
January to February - Gumi production of prospective models all
models except Cinema Screen
Normal line (LF55/56/57/62)
CoolMediumWarm
H/R Time(Min)
10-2286 295 301314328354
23-5284 290 299309326349
36-9282 287 297306324346
410-19279 283 294302321342
520-35276 278 291297318337
636-49274 275 289294316334
750-79273 272 288291315331
880-119272 271 287290314330
9Over 120271 270 286289313329
▪
INX, AUO, Sharp, CSOT (13000K Cool the SPEC)
spec271270286289313329
target278280293299320339
xyxxyx
271270286289313329
coolmedwarm
xyxyxy
※ Connecting picture of the measuring instrument
(On Automatic control)
Inside PATTERN is used when W/B is controlled. Connect to
auto controller or push Adjustment R/C POWER-ON -> Enter
the mode of White-Balance, the pattern will come out.
▪ Aging chamber line (LF55/56/57/62)
CoolMediumWarm
H/R Time(Min)
10-5280 285 294308319340
26-10276 280 290 303 315 335
311-20272 275 286 298 311 330
421-30269 272 283 295 308 327
531-40267 268 281 291 306 323
641-50266 265 280 288 305 320
751-80265 263 279 286 304 318
881-119264 261 278 284 303 316
9Over 120264 260 278 283 303 315
Only for training and service purposes
xyxxyx
271270285293313329
● 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
power supply) and heat-run over 5 minutes.
- Using ‘no signal’ or ‘full white pattern’ or the others, check
the back light on.
RS-232C COMMAND
[ CMD ID DATA ]
Wb 00 00 White Balance Start
Wb 00 ff White Balance End
RS-232C COMMAND
[CMD ID DATA]
CoolMidWarmCoolMidWarm
R GainjgJajd00172192192192
G GainjhJbje00172192192192
B GainjiJcjf00192192172192
R Cut646464128
G Cut646464128
B Cut646464128
MIN
CENTER
(DEFAULT)
MAX
*Manual W/B process using adjusts Remote control.(TBD)
■ Color analyzer(CA100+, CA210) should be used in the
calibrated ch by CS-1000
■ Operate the zero-calibration of the CA100+ or CA-210, then
stick sensor to the module when adjusting.
■ After enter Service Mode by pushing “ADJ” key,
■Enter White Balance by pushing “►” key at “8. White Balance”.
(5) Adjust two modes (Medium / Warm) Fix the one of R/G/B gain
to 192 (default data) and decrease the others.
(6) Adj. is completed, Exit adjust mode using “EXIT” key on
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.
※ CASE Cool
First adjust the coordinate far away from the target value(x, y).
(1) x, y > target
i) Decrease the R, G.
(2) x, y < target
i) First decrease the B gain,
ii) Decrease the one of the others.
(3) x > target , y< target
i) First decrease B, so make y a little more than the target.
ii) Adjust x value by decreasing the R
(4) x < target , y >target
i) First decrease B, so make x a little more than the target.
ii) Adjust x value by decreasing the G
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
■ For manual adjustment, it is also possible by the following
sequence.
(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 -> 8. White-
Balance then press the cursor to the right (KEY►). When
KEY(►) is pressed 206 Gray internal pattern will be
displayed.
(4) Adjust Cool modes
(i). Fix the one of R/G/B gain to 192 (default data) and
decrease the others
(If G gain is adjusted over 172 and R and B gain less than
192, increase G gain to 192 and increase R gain and B gain
same amount of increasing G gain.)
(ii). If G gain is less than 172,
Increase G gain by up to 172, and then increase R gain and
G gain same amount of increasing G gain.
(iii). 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
i) Decrease the R, G.
(2) x, y < target
i) First decrease the B gain,
ii) Decrease the one of the others.
(3) x > target , y< target
i) First decrease B, so make y a little more than the target.
ii) Adjust x value by decreasing the R
(4) x < target , y >target
i) First decrease B, so make x a little more than the target.
ii) Adjust x value by decreasing the G
▪ After You finish all adjustments, Press “In-start” button and
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, then
correct it same with BOM and unplug AC cable. For correct it to
the model’s module from factory JIG model.
▪ Push the “IN STOP KEY” after completing the function
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.
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
TP for CI slot
/PCM_REG
/PCM_OE
/PCM_WE
/PCM_IORDPCM_A[11]
/PCM_IOWRCI_TS_DATA[1]
/PCM_CE
/PCM_IRQA
/PCM_CD
/PCM_WAIT
PCM_RST
PCM_5V_CTL
/CI_DET
TP for S2
PCM_D[0]
PCM_D[2]
PCM_D[3]
PCM_D[4]
PCM_D[5]
PCM_D[6]
PCM_D[7]
PCM_A[8]
PCM_A[9]
PCM_A[10]
PCM_A[12]
PCM_A[13]
PCM_A[14]
TP for FE_TS_DATA
CI_TS_CLK
CI_TS_VAL
CI_TS_SYNC
CI_TS_DATA[0]
CI_TS_DATA[2]
CI_TS_DATA[3]
CI_TS_DATA[4]
CI_TS_DATA[5]
CI_TS_DATA[6]
CI_TS_DATA[7]
TP for SCART
SCART1_MUTE
SC1_IDPCM_D[1]
SC1_FB
DTV/MNT_VOUT
SCART1_Lout
SCART1_Rout
SC1_R+/COMP1_Pr+
SC1_G+/COMP1_Y+
SC1_B+/COMP1_Pb+
SC1/COMP1_DET
SC1/COMP1_L_IN
SC1/COMP1_R_IN
TP for Headphone
HP_LOUT
HP_ROUT
SIDE_HP_MUTE
HP_DET
TP for L15
/VBUS_EN
RGB_DDC_SCL
RGB_DDC_SDA
TU_GND_A
FE_TS_DATA[1]
FE_TS_DATA[2]
FE_TS_DATA[3]
FE_TS_DATA[4]
FE_TS_DATA[5]
FE_TS_DATA[6]
FE_TS_DATA[7]
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
L15_M1A
TP_NON_EU3
140702
Page 21
POWER
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
FROM POWER B/D 13.2V
+3.5V_ST
MMBT3906(NXP)
R406
10K
R404
4.7K
TR_NXP
Q400
MMBT3904(NXP)
R419
100
TR_NXP
Q402
MMBT3904(NXP)
1
TVS_SEMTECH
RL_ON
INV_CTL
+3.5V_ST
OPT
R400
10K
R401
10K
+3.5V_ST
R426
10K
TR_KEC
Q400-*1
2N3904S
B
R402
10K
+3.3V_Normal
R425
10K
TR_KEC
Q402-*1
2N3904S
B
B
B
R420
C
E
C
E
C
E
1K
C
E
+13.2V to +3.5V_STANDBY
+13.2V
L412
BLM18PG121SN1D
C438
C439
10uF
0.1uF
25V
25V
R1
R46 9
R468
68K
6.8K
1/1 6W
1/16W
1%
1%
C440
100pF
50V
R2
R471
C441
22K
1/16W
1%
2200pF
1uF
10V
Vout=0.765*(1+R1/R2)
TR_NXP
Q401
ZD404
TVS_KEC
ZD404-*1
R470
10K
C442
50V
3
2
5V
TR_KEC
Q401-*1
2N3906S-RTK
EBC
OPT
R412
33K
SMAW200-H12S5K(BK)(LTR)
PWR_ON
D13.2V
A13.2V
DRV_ON
IC405
BD9D321EFJ
EN
1
FB
2
VREG
3
SS
4
3A
GND
GND
THERMAL
+13.2V POWER_DET
+13.2V
R430
14K
1%
R431
C415
5.6K
0.1uF
1%
25V
P401
1
2
4
3
5
6
7
8
10
9
11
12
13
PDIM#2
D13.2V
D13.2V
A13.2V
GND
PDIM#1
OPT
R467
R424
3.9K
1K
PWM1
L403
MLB-201209-0120P-N2
C40 2
OPT
0.1 uF
L414
25V
L415
MLB-201209-0120P-N2
PWM_DIM
OPT
C43 3
4.7 uF
50V
C44 6
0.1 uF
25V
+13.2V
A13.2V
R435
100K
RESET_IC_KEC
IC401
KIC7529M2
VCC
3
1
IC401-*1
RESET_IC_DIODES
APX803E29
VCC
3
1
OUT
2
GND
RESET
2
GND
R454
100
+3.5V_ST
C422
0.1uF
16V
OPT
R438
4.7K
POWER_DET
POWER_DET_RESET
+13.2V to PANEL_VCC+3.5V_ST to +3.3V_Normal
PANEL_VCC
D
R451
R452
5.6K
5.6K
G
C
TR_KEC
Q403-*1
2N3904S
E
POWER_ON/OFF_1
+3.5V_ST
R443
10K
R444
10K
B
R447
22K
R448
2.2K
C428
2.2uF
10V
C
TR_NXP
Q404
MMBT3904(NXP)
E
UBW2012-121F
PANEL_CTL
L408
120OHM
OPT
C425
0.1uF
25V
R441
+13.2V
10K
R442
10K
B
R445
R446
120K
33K
NON_60_SHARP
C
TR_NXP
Q403
MMBT3904(NXP)
E
SSM3J332R
C427
0.22uF
25V
Q405
S
60_SHARP
C427-*1
0.1uF
50V
B
FET_AOS
Q406-*1
AO3435
S
G
FET_TOSHIBA
Q406
SSM3J332R
S
B
G
C
E
D
D
C429
0.1uF
16V
TR_KEC
Q404-*1
2N3904S
L410
BLM18PG121SN1D
C430
22uF
10V
+3.3V_Normal
ZD402
5V
TVS_SEMTECH
TVS_KEC
ZD402-*1
+3.5V_Normal to +1.5V_DDR
+3.5V_ST
TVS_SEMTECH
[EP]
VIN
8
9
7
6
5
BOOT
SW
GND
C443
0.1uF
16V
L413
2uH
C444
22uF
10V
C445
22uF
ZD405
5V
TVS_KEC
ZD405-*1
10V
+3.3V_Normal
L409
BLM18PG121SN1D
C426
10uF
10V
IC404
AZ1117EH-ADJTRG1
OUTIN
ADJ/GND
1.3A
R449
1K
1/16W
1%
R450
200
1/16W
1%
Vout=1.25*(1+R2/R1)+Iadj*R2
R1
R2
L411
CB2012PK501T
R453
0
C431
10uF
10V
+1.5V_DDR
ZD403
2.5V
OPT
ZD406
5.1v
+5V_Normal & +1.10V_VDDC
+13.2V
L404
CB2012PK501T
C405
C406
10uF
10uF
25V
25V
+3.3V_Normal
R403
10K
OPT
C403
4700pF
50V
USB1_CTL
Check the pull down
when AC Power On with HDD
USB1_CTL_Pull_Down
USB1_OCD
+3.3V_Normal
OPT
R473
C404
30K
4700pF
R405
10K
OPT
OPT
R474
+3.3V_Normal
30K
50V
R472
3.3K
OPT
R407
4.7K
R408
100K
+5V_Normal
C408
2200pF
2200pF
OPT
50V
OPT
C409
50V
R409
91K
C407
1uF
10V
SS2
EN1
EN2
ROSC/SYNC
SW_EN
NFAULT
+5V_USB
[EP]
1
2
3
4
5
6
THERMAL
25
7
SW_OUT
VIN123V7V24SS1
22
IC400
SNXXXXX
9
8
VIN2
SW_IN
10
PGND2
LX2
25V
0.047uF
C410
BST120LX121PGND1
19
COMP1
18
FB1
17
AGND
16
RSET
15
FB2
14
COMP2
13
11
12
BST2
+5V_Normal
Vout=0.6(R1/R2)+0.6
L405
4.7uH
R1
OPT
C411
R411
82pF
4.7K
50V
1%
R2
R413
5.1K
1%
C416
22pF
50V
C417
R41 4
3300pF
10K
50V
R422
15K
C419
22pF
50V
C420
3300pF
R41 8
50V
20K
L406
C421
0.047uF
4.7uH
25V
OPT
ZD407
5.1v
R1
R415
R416
5.1K
R417
+1.10V_VDDC
OPT
C412
C413
ZD401
10uF
2.5V
6.3V
0
5%
R2
1%
39K
1%
C418
47pF
50V
+5V_Normal
C423
22uF
16V
22uF
C414
22uF
10V
10V
C424
22uF
16V
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
C432
1uF
16V
L14_CA
POWER
Vout=0.6(R1/R2)+0.6
140826
4
Page 22
HDMI (REAR 1 / SIDE 1 MHL)
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
HDMI_1
5V_HDMI_2
R802
1.8K
VA800
R803
1K
SHIELDGND
20
HP_DET
19
5V
18
GND
17
DDC_DATA
ESD_HDMI1_VARISTOR
16
DDC_CLK
15
NC
14
CE_REMOTE
13
CK-
12
CK_GND
11
CK+
10
EAG59023302
JK800
This GND Pattern should be very narrow
HDMI jack burnt problem improvement
9
8
7
6
5
4
3
2
1
D0-
D0_GND
D0+
D1-
D1_GND
D1+
D2-
D2_GND
D2+
5V_DET_HDMI_2
R805
3.3K
ESD_HDMI1_VARISTOR
VA801
ESD_HDMI1_CAP
VA800-*1
1uF
10V
ESD_HDMI1_CAP
VA801-*1
1uF
10V
AR801
5.1
AR802
5.1
MMBT3904(NXP)
ESD_HDMI1
VA802
TR_NXP
Q800
C
E
TR_KEC
Q800-*1
2N3904S
B
C
B
E
ESD_HDMI1
VA803
ESD_HDMI1_TMDS
IP4294CZ10-TBR
ESD_HDMI1_TMDS
IP4294CZ10-TBR
HDMI_2 MHL
5V_HDMI_4
R808
10K
R809
10K
R810 100
R811 100
ESD_HDMI1
VA804
D803
1
2
3
4
5
1
2
3
4
5
D804
10
9
8
7
6
10
9
8
7
6
HPD2
DDC_SDA_2
DDC_SCL_2
HDMI_ARC
HDMI_CEC
CK-_HDMI2
CK+_HDMI2
D0-_HDMI2
D0+_HDMI2
D1-_HDMI2
D1+_HDMI2
D2-_HDMI2
D2+_HDMI2
BODY_SHIELD
20
JK801-*1
DAADR019A
HDMI-2_EMI_FOOSUNG
GND
20
HP_DET
19
5V
18
GND
17
DDC_DATA
16
DDC_CLK
15
NC
14
CE_REMOTE
13
CK-
12
CK_GND
11
CK+
10
EAG62611204
HDMI-2
JK801
19
HOT_PLUG_DETECT
18
VDD[+5V]
17
DDC/CEC_GND
16
SDA
This GND Pattern should be very narrow
15
SCL
HDMI jack burnt problem improvement
14
RESERVED
13
CEC
12
TMDS_CLK-
11
TMDS_CLK_SHIELD
10
TMDS_CLK+
9
TMDS_DATA0-
8
TMDS_DATA0_SHIELD
7
TMDS_DATA0+
6
TMDS_DATA1-
5
TMDS_DATA1_SHIELD
4
TMDS_DATA1+
3
TMDS_DATA2-
2
TMDS_DATA2_SHIELD
1
TMDS_DATA2+
9
8
7
6
5
4
3
2
1
D0-
D0_GND
D0+
D1-
D1_GND
D1+
D2-
D2_GND
D2+
HDMI-2
R812
1.8K
5V_DET_HDMI_4
ESD_HDMI2
VA805
HDMI-2
R813
3.3K
ESD_HDMI2
VA806
OPT
VA807
5.6V
HDMI-2_MHL
R818
0
HDMI-2_MHL_Non
R819
0
ESD_HDMI2
VA808
ESD_HDMI2
VA809
ESD_HDMI2
VA811
D805
1
2
3
4
5
ESD_HDMI2_TMDS
IP4294CZ10-TBR
1
2
3
4
5
ESD_HDMI2_TMDS
IP4294CZ10-TBR
D806
10
9
8
7
6
10
9
8
7
6
ESD_HDMI2
VA810
HDMI-2_MHL
HDMI-2
R814
33
HDMI-2
R815100
R816100
HDMI-2
AR804
5.1
AR803
5.1
C800
0.047uF
25V
HDMI-2_MHL
R817
300K
MHL Spec
HDMI-2_MHL_Non
R817-*1
3.3K
HPD4
DDC_SDA_4
DDC_SCL_4
HDMI_CEC
CK-_HDMI4
CK+_HDMI4
D0-_HDMI4
D0+_HDMI4
D1-_HDMI4
D1+_HDMI4
D2-_HDMI4
D2+_HDMI4
MHL_CD_SENSE
CEC
HDMI_CEC
HDMI_DIODE_SUZHOU
D800-*1
MMBD6100
A1
C
5V_HDMI_2
R800
2.7K
+5V_Normal
R801
2.7K
R804
100
A2
HDMI_DIODE_KEC
A2CA1
KDS184
D800
DDC_SDA_2
DDC_SCL_2
CEC_REMOTE_S7
HDMI_DIODE_SUZHOU
D801-*1
MMBD6100
A1
C
R806
2.7K
+5V_Normal
R807
2.7K
5V_HDMI_4
HDMI_DIODE_SUZHOU
A2
HDMI_DIODE_KEC
A2CA1
KDS184
D801
D802-*1
MMBD6100
DDC_SDA_4
DDC_SCL_4
A2
A1
C
+3.5V_ST
A2CA1
HDMI_DIODE_KEC
KDS184
D802
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
L15_M1A
HDMI_R1S18
140813
Page 23
SPDIF
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
SPDIF_OUT
+3.3V_Normal
OPT
C1001
1uF
10V
ESD Ready
SPDIF_OPTIC
C1002
18pF
50V
VINPUT
SPDIF_OPTIC
JK1001
JST1223-001
1
GND
2
VCC
3
Fiber Optic
4
FIX_POLE
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
L14_CA_M1A
SPDIF
2014/06/02
10
Page 24
DDR_EXT
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
L14_CA_M1A
DDR
2014/06/13
12
Page 25
Serial Flash for SPI boot
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
/FLASH_WP
OPT
R1300
10K
+3.5V_ST
/SPI_CS
SPI_SDO
R1301
4.7K
OPT
WP#/SIO2
SPI_FLASH_MACRONIX
IC1300
MX25L8035EM2I-10G
CS#
1
SO/SIO1
2
3
GND
4
SPI_FLASH_WINBOND
IC1300-*1
W25Q80DVSSIG
CS
1
DO[IO1]
2
WP[IO2]
3
GND
4
8
7
6
5
8
7
6
5
VCC
NC/SIO3
SCLK
SI/SIO0
VCC
HOLD[IO3]
CLK
DI[IO0]
R1302
33
+3.5V_ST+3.5V_ST
C1300
0.1uF
16V
SPI_SCK
SPI_SDI
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
L14_CA_M1A
S_FLASH
140721
13
Page 26
Central and South Americatuner block
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
TU_GND_A
TU_GND_B
L14_CA_M1A
TUNER_CSA
Vo=0.8*(1+R1/R2)=1.2364
2014.08.11
14
Page 27
COMPONENT & AV1(COMMON), AV2
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
COMP_AV1/2_YG
JK1701
PPJ248-21
[RD3]E-LUG
6C
[RD3]O-SPRING
5C
VA1706
5.6V
AV2_LR_ZENER
R1700
470K
AV2
C1701
330pF
50V
OPT
R1716
10K
AV2
R1718
12K
AV2
AV2_R_IN
AV2
COMPONENT
&
AV1
COMP_AV1_YG
JK1702
PPJ245N2-01
[RD2]E-LUG
6E
[RD2]O-SPRING
5E
[RD2]CONTACT
4E
[WH]O-SPRING
5D
[RD1]CONTACT
4C
[RD1]O-SPRING
5C
[RD1]E-LUG-S
7C
[RD3]CONTACT
4C
[WH2]O-SPRING
5B
[YL]CONTACT
4A
[YL]O-SPRING
5A
[YL]E-LUG
6A
[RD2]E-LUG
6H
[RD2]O-SPRING
5H
[RD2]CONTACT
4H
[WH1]O-SPRING
5G
[RD1]CONTACT
4F
[RD1]O-SPRING
5F
[RD1]E-LUG-S
7F
AV2_CVBS_ZENER_ROHM
COMP_Pr_ZENER_ROHM
ZD1701
VA1704
5.6V
AV2_LR_ZENER
VA1705
5.6V
OPT
ZD1706
AV2_CVBS_ZENER_ROHM
ZD1707
VA1700
5.6V
COMP_LR_ZENER
VA1701
5.6V
COMP_LR_ZENER
VA1702
5.6V
OPT
ZD1700
COMP_Pr_ZENER_ROHM
R1703
470K
R1704
470K
R1709
10K
R1701
470K
AV2
+3.3V_Normal
R1705
75
+3.3V_Normal
R1708
10K
AV2
R1712
1K
R17111K
AV2
AV2
R1725
75
3216
1%
1/4W
C1704
330pF
50V
OPT
C1705
330pF
50V
OPT
R1714
10K
R1715
10K
COMP2_DET
C1702
330pF
50V
OPT
R1717
10K
AV2
AV2_CVBS_DET
R1720
12K
R1721
12K
R1719
12K
AV2
C1703
47pF
50V
AV2
AV2_L_IN
SC1/AV2_CVBS_IN
COMP2_R_IN
COMP2_L_IN
COMP2_Pr+
ZD1707-*1
AV2_CVBS_ZENER_KEC
ZD1701-*1
COMP_Pr_ZENER_KEC
ZD1706-*1
AV2_CVBS_ZENER_KEC
ZD1700-*1
COMP_Pr_ZENER_KEC
[BL]O-SPRING
5B
[GN/YL]CONTACT
4A
[GN/YL]O-SPRING
5A
[GN/YL]E-LUG
6A
[BL]O-SPRING
5E
[YL/GN]CONTACT
4D
[YL/GN]O-SPRING
5D
[YL/GN]E-LUG
6D
ZD1703
COMP_Pb_ZENER_ROHM
ZD1705
COMP_Y_ZENER_ROHM
ZD1702
COMP_Pb_ZENER_ROHM
VA1703
5.6V
OPT
ZD1704
COMP_Y_ZENER_ROHM
R1706
75
+3.3V_Normal
R1710
10K
R1722
75
3216
1%
1/4W
R1713
1K
CVBS_OUT_TEST
R1724
0
CVBS_OUT_TEST
R1723
75
COMP2_Pb+
AV_CVBS_DET
COMP2_Y+/AV_CVBS_IN
DTV/MNT_VOUT
ZD1703-*1
COMP_Pb_ZENER_KEC
ZD1705-*1
COMP_Y_ZENER_KEC
ZD1702-*1
COMP_Pb_ZENER_KEC
ZD1704-*1
COMP_Y_ZENER_KEC
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
L14_CA_M1A
REAR_JACK_NON_EU
2014/05/29
17
Page 28
LVDS
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
[51Pin LVDS Connector]
(For FHD 60Hz)
MO_FHD
P1800
SP14-11592-01-51Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
PANEL_VCC
C1800
0.1uF
25V
VCOM_SDA
VCOM_SCL
RXA4+
RXA4-
RXA3+
RXA3-
RXACK+
RXACK-
RXA2+
RXA2-
RXA1+
RXA1-
RXA0+
MO_FHD_non_55CSOT
RXA0-
RXB4+
RXB4-
RXB3+
RXB3-
RXBCK+
RXBCK-
RXB2+
RXB2-
RXB1+
RXB1-
RXB0+
MO_FHD_non_55CSOT
RXB0-
MO_FHD_VCC_CAP
C1801
10uF
25V
+3.3V_Normal
Cell_CSOT_55inch
R1806
1K
OPT
R1807
10K
R1801
0
0
R1812
Cell_INX_FHD
AR1800
0
1/16W
LVDS_SEL
FOR FHD REVERSE(10bit)
Change in S7LR
MIRROR
RXA4+
RXA4-
RXA3+
RXA3-
RXACK+
RXACK-
RXA2+
RXA2-
RXA1+
RXA1-
RXA0+
RXA0-
RXB4+
RXB4-
RXB3+
RXB3-
RXBCK+
RXBCK-
RXB2+
RXB2-RXBCK-
RXB1+
RXB1-
RXB0+
RXB0-
Pol-change
RXA0+
RXA0-
RXA1+
RXA1-
RXA2+
RXA2-
RXACK+
RXACK-
RXA3+
RXA3-
RXA4+
RXA4-
RXB0+
RXB0-
RXB1+
RXB1-
RXB2+
RXB2-
RXBCK+
RXB3+
RXB3-
RXB4+
RXB4-
FOR FHD REVERSE(8bit)
Change in S7LR
RXA4+
RXA4-
RXA3+
RXA3-
RXACK+
RXACK-
RXA2+
RXA2-
RXA1+
RXA1-
RXA0+
RXA0-
RXB4+
RXB4-
RXB3+
RXB3-
RXBCK+
RXBCK-
RXB2+
RXB2-
RXB1+
RXB1-
RXB0+
RXB0-
MIRROR
Pol-change
RXA4+
RXA4-
RXA0+
RXA0-
RXA1+
RXA1-
RXA2+
RXA2-
RXACK+
RXACK-
RXA3+
RXA3-
RXB4+
RXB4-
RXB0+
RXB0-
RXB1+
RXB1-
RXB2+
RXB2-
RXBCK+
RXBCK-
RXB3+
RXB3-
RXA0-
RXA0+
RXA1-
RXA1+
RXA2-
RXA2+
RXACK-
RXACK+
RXA3-
RXA3+
RXA4-
RXA4+
RXB0-
RXB0+
RXB1-
RXB1+
RXB2-
RXB2+
RXBCK-
RXBCK+
RXB3-
RXB3+
RXB4-
RXB4+
Shift
RXA4-
RXA4+
RXA0-
RXA0+
RXA1-
RXA1+
RXA2-RXACK-
RXA2+
RXACK-
RXACK+
RXA3-
RXA3+
RXB4-
RXB4+
RXB0-
RXB0+
RXB1-
RXB1+
RXB2-
RXB2+
RXBCK-
RXBCK+
RXB3-
RXB3+
RXA0-
RXA0+
RXA1-
RXA1+
RXA2-
RXA2+
RXACK+
RXA3-
RXA3+
RXA4-
RXA4+
RXB0-
RXB0+
RXB1-
RXB1+
RXB2-
RXB2+
RXBCK-
RXBCK+
RXB3-
RXB3+
RXB4-
RXB4+
[30Pin LVDS Connector]
(For HD 60Hz_Normal)
MO_HD
P1801
10031HR-30
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
VCOM_SDA
VCOM_SCL
RXA3+
RXA3-
RXACK+
RXACK-
RXA2+
RXA2-
RXA1+
RXA1-
RXA0+
RXA0-
PANEL_VCC
LVDS_SEL
+3.3V_Normal
OPT
R1808
3.3K
OPT
R1809
10K
EU pin assign is different from NON EU.
Because of position of HD wafer.
V-COM I2C
URSA/VCOM_SCL
URSA/VCOM_SDA
VCOM_SCL
VCOM_SDA
+3.3V_Normal
VCOM_I2C_PULL_UP
R1810
2K
VCOM_I2C
R1804
0
VCOM_I2C
R1805
0
VCOM_I2C_PULL_UP
R1811
2K
URSA/VCOM_SCL
URSA/VCOM_SDA
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
L14_CA_M1A
LVDS
140613
18
Page 29
RS-232C 4PIN
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
RS-232C 4PIN
+3.5V_ST
PM_RXD
PM_TXD
AR4000
100
1/16W
MSTAR DEBUG 4PIN
RS232C_DEBUG_4P
VCC
PM_RXD
GND
RM_TXD
P4000
12507WS-04L
1
2
3
4
5
GND
JP_GND1
JP_GND2
JP_GND3
JP_GND4
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
L14_CA_M1A
RS232C_MSTAR_DEBUG_4P
2014/05/22
40
Page 30
IR + LED + Digital Eye + Control Key
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
+3.5V_ST
R4603
R4604
10K
10K
1%
KEY1
KEY2
LED_R/BUZZ
SENSOR_SCL
SENSOR_SDA
BLM18PG121SN1D
IR
IR_Eye_Sensor
+3.5V_ST
L4600
C4600
0.1uF
+3.5V_ST
R4600
3.3K
+3.3V_Normal
R4605
1K
C4601
1000pF
50V
IR_Eye_Sensor
R4607
1K
R4601
100
R4602
100
R4606
1.8K
C4604
100pF
50V
IR_Eye_Sensor
R4608
100
IR_Eye_Sensor
R4609
100
C4602
0.1uF
16V
C4603
0.1uF
16V
For EMI
OPT
VA4600
5.6V
OPT
ZD4601
IR_Eye_Sensor
C4605
18pF
50V
IR_Eye_Sensor
C4606
18pF
50V
1%
5V
IR_10p
P4600
12507WR-10L
1
2
3
4
5
6
7
8
9
10
11
IR_8p
P4601
12507WR-08L
1
2
3
4
5
6
7
8
9
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
L14_CA_M1A
IR_EYE_SENSOR
2014/06/02
46
Page 31
/F_RB
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
/PF_OE
/PF_CE0
/PF_CE1
PF_ALE
/PF_WE
/PF_WP
DIMMING
PWM_DIM
NAND FLASH MEMORY
AR103
22
AR104
22
NAND_FLASH_2G_HYNIX_OLD
NC_1
1
NC_2
2
NC_3
3
NC_4
4
NC_5
5
NC_6
6
R/B
7
RE
8
CE
9
NC_7
10
NC_8
11
VCC_1
12
VSS_1
13
NC_9
14
NC_10
15
CLE
16
ALE
17
WE
18
WP
19
NC_11
20
NC_12
21
NC_13
22
NC_14
23
NC_15
24
NAND_FLASH_2G_HYNIX_NEW
NC_1
1
NC_2
2
NC_3
3
NC_4
4
NC_5
5
NC_6
6
R/B
7
RE
8
CE
9
NC_7
10
NC_8
11
VCC_1
12
VSS_1
13
NC_9
14
NC_10
15
CLE
16
ALE
17
WE
18
WP
19
NC_11
20
NC_12
21
NC_13
22
NC_14
23
NC_15
24
EEPROM
NVRAM_ST
IC104
M24256-BRMN6TP
E0
1
E1
2
A0’h
E2
3
VSS
4
EAN61548301
EAN60708702
IC102-*1
H27U2G8F2CTR
EAN60708703
IC102-*2
H27U2G8F2DTR-BD
R103
100
R102
10K
R143
10K
+3.3V_Normal
R101
3.3K
NC_29
48
NC_28
47
NC_27
46
NC_26
45
I/O7
44
I/O6
43
I/O5
42
I/O4
41
NC_25
40
NC_24
39
NC_23
38
VCC_2
37
VSS_2
36
NC_22
35
NC_21
34
NC_20
33
I/O3
32
I/O2
31
I/O1
30
I/O0
29
NC_19
28
NC_18
27
NC_17
26
NC_16
25
NC_29
48
NC_28
47
NC_27
46
NC_26
45
I/O7
44
I/O6
43
I/O5
42
I/O4
41
NC_25
40
NC_24
39
NC_23
38
VCC_2
37
VSS_2
36
NC_22
35
NC_21
34
NC_20
33
I/O3
32
I/O2
31
I/O1
30
I/O0
29
NC_19
28
NC_18
27
NC_17
26
NC_16
25
VCC
8
WC
7
SCL
6
SDA
5
C105
0.1uF
OPT
R104
1K
R105
1K
NC_1
NC_2
NC_3
NC_4
NC_5
NC_6
RY/BY
NC_7
NC_8
VCC_1
VSS_1
NC_9
NC_10
CLE
ALE
NC_11
NC_12
NC_13
NC_14
NC_15
PWM2
PWM0
PWM3
+3.3V_Normal
C106
C104
8pF
8pF
OPT
OPT
R106
1K
OPT
R107
C101
1K
0.1uF
NAND_FLASH_1G_TOSHIBA
TC58NVG0S3HTA00
1
2
3
4
5
6
7
RE
8
CE
9
10
11
12
13
14
15
16
17
WE
18
WP
19
20
21
22
23
24
R1111KR112
R10822
R10922
+3.3V_Normal
R110
3.9K
EAN61508002
IC102-*3
I2C
+3.3V_Normal
1K
NC_1
NC_2
NC_3
NC_4
NC_5
NC_6
R/B
NC_7
NC_8
VCC_1
VSS_1
NC_9
NC_10
CLE
ALE
NC_11
NC_12
NC_13
NC_14
NC_15
I2C_SCL
I2C_SDA
RE
CE
WE
WP
R113
2.2K
IC102
H27U1G8F2CTR-BC
1
NAND_FLASH_1G_HYNIX
EAN35669103
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
NC_29
48
NC_28
47
NC_27
46
NC_26
45
I/O8
44
I/O7
43
I/O6
42
I/O5
41
NC_25
40
NC_24
39
NC_23
38
VCC_2
37
VSS_2
36
NC_22
35
NC_21
34
NC_20
33
I/O4
32
I/O3
31
I/O2
30
I/O1
29
NC_19
28
NC_18
27
NC_17
26
NC_16
25
R114
2.2K
NVRAM_RENESAS
IC104-*1
R1EX24256BSAS0A
A0
1
A1
2
A2
3
VSS
4
EAN62389501
NC_1
NC_2
NC_3
NC_4
NC_5
NC_6
RY/BY
NC_7
NC_8
VCC_1
VSS_1
NC_9
NC_10
NC_11
NC_12
NC_13
NC_14
NC_15
RE
CE
CLE
ALE
WE
WP
AMP_SDA
AMP_SCL
I2C_SDA
I2C_SCL
8
7
6
5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
VCC
WP
SCL
SDA
+3.3V_Normal
NC_29
48
NC_28
47
NC_27
46
NC_26
45
I/O7
44
I/O6
43
I/O5
42
I/O4
41
NC_25
40
NC_24
39
NC_23
38
VCC_2
37
VSS_2
36
NC_22
35
NC_21
34
NC_20
33
I/O3
32
I/O2
31
I/O1
30
I/O0
29
NC_19
28
NC_18
27
NC_17
26
NC_16
25
NAND_FLASH_2G_TOSHIBA
TC58NVG1S3HTA00
EAN60991002
IC102-*4
C102
10uF
C103
0.1uF
PM MODEL OPTION
NVRAM_ATMEL
IC104-*2
AT24C256C-SSHL-T
A0
1
A1
2
A2
3
GND
4
EAN61133501
10V
22
AR101
AR102
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
+3.5V_ST
LCD
R119
10K
PDP
R120
10K
8
7
6
5
PCM_A[7]
PCM_A[6]
PCM_A[5]
PCM_A[4]
PCM_A[3]
PCM_A[2]
PCM_A[1]
PCM_A[0]
22
NC_29
NC_28
NC_27
NC_26
I/O8
I/O7
I/O6
I/O5
NC_25
NC_24
NC_23
VCC_1
VCC_2
VSS_1
VSS_2
NC_22
NC_10
NC_21
NC_20
I/O4
I/O3
I/O2
I/O1
NC_11
NC_19
NC_12
NC_18
NC_13
NC_17
NC_14
NC_15
NC_16
PM_MODEL_OPT_0
- HIGH : LCD
- LOW :: PDP
VCC
WP
SCL
SDA
PCM_A[0-7]
NC_1
1
NC_2
2
NC_3
3
NC_4
4
NC_5
5
NC_6
6
R/B
7
RE
8
CE
9
NC_7
10
NC_8
11
12
13
NC_9
14
15
CLE
16
ALE
17
WE
18
WP
19
20
21
22
23
24
PM_MODEL_OPT_0
NVRAM_ROHM
IC104-*3
BR24G256FJ-3
A0
1
A1
2
A2
3
GND
4
EAN62389502
NAND_FLASH_1G_SS
EAN61857001
IC102-*5
K9F1G08U0D-SCB0
VCC
8
WP
7
SCL
6
SDA
5
<CHIP Config>
(SPI_SDI, PM_LED, PWM_PM)
LG-NonOS SB51_ExtSPI 3’b000 51boot from SPI
LG-OS HEMCU_ExtSPI 3’b001 MIPS boot from SPI
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
L14_CA_M1A
2014/05/29
MAIN1_NON_EU51
Page 32
MODEL OPTION
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
L14_CA_M1A
MAIN2_NON_EU
140903
52
Page 33
AUDIO AMP(TI)
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
SPK_L+
SPK_L-
SPK_R+
SPK_R-
L14_CA_AMP
1AMP_TAS
250A1-WR-H04M
WAFER-ANGLE
4
3
2
1
P5600
Box Type SPK Wafer
56
140818
Page 34
MHL SW AND GATE
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
MHL_CD_SENSE
MHL_OCP_EN
MHL_AND_GATE_TOSHIBA
IC5801
TC7SZ08FU_TOSHIBA
IN_B
1
IN_A
2
GND
3
MHL_AND_GATE_NXP
IC5801-*1
74LVC1G08GW
15
2
3
+3.3V_Normal
VCC
5
OUT_Y
4
4
OPT
R5801
MHL OCP
AVDD5V_MHL
MHL_5V_EN
10K
/MHL_OCP_DET
R5802
10
5V_HDMI_4
MHL_OCP
C5801
10uF
10V
+3.3V_Normal
MHL_OCP
R5803
0
MHL_SUZHOU
D5801
40V
SS2040LL-LG
OPT
R5805
100K
MHL_OCP
R5804
10K
MHL_ONSEMI
D5801-*1
MBR230LSFT1G
30V
OUT_3
OUT_2
OUT_1
OC
MHL_OCP
IC5802
BD82020FVJ
8
7
6
5
+5V_Normal
GND
1
IN_1
2
IN_2
3
EN
4
MHL_OCP
R5806
10K
MHL_OCP
C5802
0.1uF
MHL_5V_EN
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
MHL_SW_AND
140815L14_CA_M1A
58
Page 35
USB 3216 CAP(SIDE)
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
+5V_USB
JK700
1234
USB DOW N ST REAM
OPT
OPT
C701
C702
5pF
3AU 04S- 305- ZC-( LG)
5
5pF
50V
50V
ZD700
SD05
5V
OPT
USB_CAP4
C700
22uF
16V
R700
2.2
R701
2.2
OPT
D700
RCLAMP0502BA
USB_CAP2
C703
22uF
16V
USB_CAP3
C704
22uF
16V
USB_CAP1
C705
22uF
16V
SIDE_USB1_DM
SIDE_USB1_DP
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
L14_CA_M1A
USB_3216_CAP4
140707
75
Page 36
Page 37
Contents of Standard Repair Process
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Vertical/Horizontal bar, residual image, light
spot, external device color error
No power 7
Off when on, off while viewing, power auto
on/off
No audio/Normal video 9
Remote control & Local switch checking 11
6
8
12 E. Noise Circuit noise, mechanical noise 13
13 F. Exterior error Exterior defect 14
First of all, Check whether there is SVC Bulletin in GCSC System for these model.
1 / 97
Page 38
Standard Repair Process
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Established
date
Revised date
Error
symptom
A. Video error
No video/ Normal audio
First of all, Check whether all of cables between board is inserted properly or not.
(Main B/D↔ Power B/D, LVDS Cable,Speaker Cable,IR B/D Cable,,,)
☞A4 ☞A1
N
Y
Check Back Light
On with naked eye
☞A2
Check Power Board 13.2V output
On
Normal
voltage
N
Repair Power
Board or parts
Y N Check Power Board
13.2V etc.
Replace Inverter
Y
or module
Normal
voltage
Repair Power Board
or parts
End
Y
N
No video
Normal audio
Normal
audio
Move to No
video/No audio
1/14
Replace T-con Board
or module
※Precaution
Always check & record S/W Version and White
Balance value before replacing the Main Board
☞A6 & A3
Replace Main Board
2 / 97
Re-enter White Balance value
Page 39
Standard Repair Process
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error
symptom
No Video/
No audio
A. Video error
No video/ No audio
☞A4
Check various voltages
of Power Board ( 13.2V)
Normal
voltage?
N
Replace Power
Board and repair
parts
Y
Check and
replace
MAIN B/D
Established
date
Revised date
End
2/14
3 / 97
Page 40
Standard Repair Process
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error
symptom
☞ A5
Check RF Signal level
Normal
Signal?
N
Check RF Cable
Connection
1. Reconnection
2. Install Booster
Normal
Picture?
Y
Y
N
A. Video error
Picture broken/ Freezing
. By using Digital signal level meter
. By using Diagnostics menu on OSD
( Menu→ Set up→ Support → Signal Test )
- Signal strength (Normal : over 50%)
- Signal Quality (Normal: over 50%)
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ DVD Player ,Set-Top-Box, Different maker TV etc`
☞ A6
Normal
Picture?
N
Contact with signal distributor
or broadcaster (Cable or Air)
Y
Check
S/W Version
SVC
Bulletin?
Y
S/W Upgrade
Normal
Picture?
Established
date
Revised date
N
Tuner soldering
N
Check
Normal
Picture?
N
Replace
Main B/D
3/14
Y
Close
Close
Y
Close
4 / 97
Page 41
Standard Repair Process
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error
symptom
☞ A5
Check RF Signal level
Normal
Signal?
N
Contact with signal
distributor
or broadcaster
(Cable or Air)
A. Video error
Tuning fail, Picture broken/ Freezing
Check RF signal cable
Check whether other equipments have problem or not.
(By connecting RF Cable at other equipment)
→ Set-Top-Box, Different maker TV etc
☞ A6
Y
Check
S/W Version
S/W Upgrade
SVC
Bulletin?
Y
N
Normal
Picture?
N
Tuner soldering
Check
Established
date
Revised date
Replace
Main B/D
4/14
Close
Y
Close
5 / 97
Page 42
Standard Repair Process
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error
symptom
☞A7
Check color by input
-External Input
-COMPONENT
-RGB
-HDMI/DVI
☞A10
Check Test pattern
Color
error?
Check error
color input
mode
☞ A8/ A9
※ Check and
replace Link
Y
Cable
(LVDS) and
N
contact
condition
External Input/
Component
error
A. Video error
Color error
Color
error?
Check
external
device and
cable
N
Y
Replace Main B/D
Established
date
Revised date
External device
/Cable
normal
N
Color
error?
End
Y
5/14
Y
Replace module
N
Replace Main B/D
RGB/
HDMI/DVI
error
Check external
device and
cable
6 / 97
Request repair
for external
device/cable
N
External device
/Cable
normal
Y
Replace Main B/D
Page 43
Standard Repair Process
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error
symptom
Vertical / Horizontal bar, residual image,
A. Video error
light spot, external device color error
Vertical/Horizontal bar, residual image, light spot
☞A7
Check color condition by input
-External Input
-Component
-RGB
-HDMI/DVI
☞A10
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
Check screen
condition by input
Check S/W Version
Check
version
Y
S/W Upgrade
Normal
screen?
Y
End
N
N
-External Input
-Component
-RGB
-HDMI/DVI
☞ A8/ A9
Check and
Y
replace Link
Cable
External
Input
error
Component
error
RGB
error
HDMI/
DVI
Established
date
Revised date
Screen
normal?
End
N
Replace Main B/D
Y
Connect other external
device and cable
(Check normal operation of
External Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
Connect other external
device and cable
(Check normal operation of
External Input, Component,
RGB and HDMI/DVI by
connecting Jig, pattern
Generator ,Set-top Box etc.
Screen
normal?
Request repair for
external device
Screen
normal?
N
Y
Y
N
6/14
Replace
Module
N
Screen
normal?
Y
End
Replace
Main B/D
Replace
Main B/D
7 / 97
Page 44
Standard Repair Process
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
symptom
☞A11
Check
Power LED
. Stand-By: Red
Error
Power LED
Check Power cord
was inserted properly
Normal?
On?
N
Y
End
Y
N
※
B. Power error
No power
DC Power on
by pressing Power Key
On Remote control
Check ST-BY 3.5V
☞A12
Y
Normal
Y
voltage?
Established
date
Revised date
☞A13
Y
N
Check Power
On ‘”High”
Replace Main B/D
Normal
operation?
☞A4
Measure voltage of each output of Power B/D
N
Y
Replace Main B/D
Normal
voltage?
OK?
Y
7/14
Replace
Power
B/D
Replace Power B/D
N
Replace Power
B/D
8 / 97
Page 45
Standard Repair Process
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error
symptom
Check outlet
Check A/C cord
Check for all 3- phase
power out
Off when on, off while viewing, power auto on/off
Error?
Y
Fix A/C cord & Outlet
and check each 3
phase out
N
B. Power error
☞A14
Check Power Off
Mode
☞A13
(If Power Off mode is
not displayed)
Check Power B/D
voltage
※ Caution
Check and fix exterior
of Power B/D Part
Established
date
Revised date
CPU
Abnormal
Abnormal
1
Normal
voltage?
N
Replace Power B/D
Replace Main B/D
Y
Replace Main B/D
Normal?
Replace Power B/D
Y
N
8/14
End
* Please refer to the all cases which
can be displayed on power off mode.
Status Power off List Explanation
"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
Abnormal
"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
"POWEROFF_CPUABNORMAL" Power off by CPU Abnormal
9 / 97
Page 46
Standard Repair Process
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error
symptom
No audio
Screen normal
C. Audio error
No audio/ Normal video
☞A15 ☞A16
Check user
menu >
Speaker off
Off
Cancel OFF
Y
N
Check audio B+ A13.2V
of Power Board
Established
date
Revised date
Normal
voltage
Replace Power Board and repair parts
Y
N
9/14
Check Speaker
disconnection
Disconnection
Y
Replace Speaker
10 / 97
N
Replace MAIN Board
End
Page 47
Standard Repair Process
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Check input
signal
-RF
-External Input
signal
Established
date
Revised date
Error
symptom
C. Audio error
Wrecked audio/ discontinuation/noise
→ abnormal audio/discontinuation/noise is same after “Check input signal” compared to No audio
☞A16
Signal
normal?
N
Y
(When RF signal is not
received)
Request repair to external
cable/ANT provider
(In case of External
Input signal error)
Check and fix
external device
Wrecked audio/
Discontinuation/
Noise for
all audio
Wrecked audio/
Discontinuation/
Noise only
for D-TV
Wrecked audio/
Discontinuation/
Noise only
for Analog
Wrecked audio/
Discontinuation/
Noise only
for External Input
Check and replace
speaker and
connector
Replace Main B/D
Connect and check
other external device
Check audio
B+ Voltage (A13.2V)
Normal
voltage?
N
Replace Power B/D
Replace Main B/D
Normal
audio?
Y
N
10/14
Y
End
Check and fix external device
11 / 97
Page 48
Standard Repair Process
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error
symptom
Remote control & Local switch checking
1. Remote control(R/C) operating error
☞A17
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.
Normal
operating?
N
Check & Replace
Baterry of R/C
Replace R/C
Y
Normal
operating?
Check & Repair
Cable connection
Connector solder
End
N
D. Function error
Normal
operating?
Y
End
N
☞A17
Check B+ 3.5V
On Main B/D
☞A4
(Power B/D don’t have problem)
Established
date
Revised date
☞A17
Normal
Voltage?
Check A13.2v on Power B/D
Replace Power B/D or
Replace Main B/D
Y
N
Check IR
Output signal
11/14
Replace
Main B/D
Normal
Signal?
N
Repair/Replace
IR B/D
Y
12 / 97
Page 49
Standard Repair Process
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error
symptom
Check
input
signal
Y
Signal
input?
N
Check and fix
external device/cable
D. Function error
External device recognition error
Check technical
information
- Fix information
- S/W Version
Technical
information?
accordance
with technical
information
Y
Fix in
External Input and
N
Component
Recognition error
RGB,HDMI/
DVI, Optical
Recognition error
Established
date
Revised date
12/14
Replace Main B/D
Replace Main B/D
13 / 97
Page 50
Standard Repair Process
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error
symptom
Identify
nose type
E. Noise
Circuit noise, mechanical noise
Circuit
noise
Mechanical
noise
※ Mechanical noise is a natural
phenomenon, and apply the 1st level
description. When the customer does not
agree, apply the process by stage.
※ Describe the basis of the description in
“Part related to nose” in the Owner’s
Manual.
Check
location of
noise
Check location of
noise
OR
Replace PSU(with LED driver)
Replace LED driver
※ When the nose is severe, replace the module
(For models with fix information, upgrade the S/W
or provide the description)
OR
※ If there is a “Tak Tak” noise from the cabinet,
refer to the KMS fix information and then
OR
proceed as shown in the solution manual
(For models without any fix information, provide
the description)
Established
date
Revised date
13/14
14 / 97
Page 51
Standard Repair Process
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error
symptom
Zoom part with
exterior damage
Module
damage
Cabinet
damage
Remote
controller
damage
F. Exterior defect
Exterior defect
Replace module
Replace cabinet
Replace remote controller
Established
date
Revised date
14/14
Stand
dent
Replace stand
15 / 97
Page 52
Contents of Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
No. Error symptom Content Page Remarks
1
2 LED driver B+ 24V measuring method A2
A. Video error_ No video/Normal audio
3 Check White Balance value A3
4 Power Board voltage measuring method A4
6
A. Video error_ No video/Video lag/stop
7 TV Version checking method A6
9
10
A. Video error_Color error
11 Check Link Cable (LVDS) reconnection condition
12 Adjustment Test pattern - ADJ Key A10
13
14 Check Link Cable (LVDS) reconnection condition
15 Adjustment Test pattern - ADJ Key A10
A. Video error_Vertical/Horizontal bar,
residual image, light spot
Check LCD back light with naked eye A1
TUNER input signal strength checking method A5
TV connection diagram A7
A8
A9
TV connection diagram A8
A8
A9
16
17 Exchange T-Con Board (2) A-2/5
<Appendix>
18 Exchange LED driver Board (PSU) A-3/5
19 Exchange Module itself (1) A-4/5
20 Exchange Module itself (2) A-5/5
Defected Type caused by T-Con/ Inverter/
Module
Exchange T-Con Board (1) A-1/5
55” : driver board
Other : PSU
Continue to the next page
16 / 97
Page 53
Contents of Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Continued from previous page
No. Error symptom Content Page Remarks
21
22 Check power input Voltage & ST-BY 3.5V A12
23 Checking method when power is ON A13
24 POWER BOARD voltage measuring method A4
25
26
28
29
30
31
B. Power error_No power
B. Power error_Off when on, off while
viewing
C. Audio error_No audio/Normal video
C. Audio error_Wrecked
audio/discontinuation
D. Function error_ No response in
remote controller, key error
Check front display LED A11
POWER OFF MODE checking method A14
Checking method in menu when there is no
audio
Voltage and speaker checking method when
there is no audio
Voltage and speaker checking method in case
of audio error
Remote controller operation checking method A17
A15
A16
A16
17 / 97
Page 54
Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
<ALL MODELS>
A. Video error_No video/Normal audio
Check Back Light On with naked eye
Established
date
Revised
date
A1
Power On -> disjoint back case -> check lighting at any point
18 / 97
Page 55
Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
<LPB MODELS>
A. Video error_No video/Normal audio
Inverter B+ 24V measuring method
Established
date
Revised
date
A2
Measure LED+ applying to LED Back Light from Power Board.
Output LED+ from Power Board -> supply to LED B/L.
Check Pin contacting statement and connection statement.
19 / 97
Page 56
Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
<ALL MODELS>
A. Video error_No video/Normal audio
Check White Balance value
Established
date
Revised
date
A3
Entry method
1. Press the ADJ button on the remote controller for adjustment.
2. Enter into White Balance of item 8.
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.
20 / 97
Page 57
Standard Repair Process Detail Technical Manual
Power Board <-> Main Board
1
PWR_ON/OFF
2
PDIM#2
3
GND
4
D13.2V
5
D13.2V
6
D13.2V
7
A13.2V
8
A13.2V
9
GND
10
GND
11
DRV_ON/OFF
12
PDIM#1
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
A. Video error_No video/ Audio
Power Board voltage measuring method
Established
date
Revised
date
Check the DC 13.2V
A4
21 / 97
Page 58
Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
<ALL MODELS>
A. Video error_Video error, video lag/stop
TUNER input signal strength checking method
Established
date
Revised
date
A5
MENU => CHANNEL => Manual Tuning
=> Check Signal Strength & Signal Quality
22 / 97
Page 59
Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
A. Video error_Video error, video lag/stop
TV Version checking method
Established
date
Revised
date
A6
<ALL MODELS>
1. Checking method for remote controller for adjustment
Version
Press the IN-START with the remote
controller for adjustment
23 / 97
Page 60
Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
<ALL MODELS>
A. Video error _Vertical/Horizontal bar,
residual image, light spot
TV connection diagram (1)
Established
date
Revised
date
A7
As the part connecting to the external input, check the
screen condition by signal
24 / 97
Page 61
Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
<ALL MODELS>
A. Video error_Color error
Check and replace Link Cable(LVDS) and contact condition
Established
date
Revised
date
A8/A9
1. Check and replace LVDS Cable
2. Check LVDS connection condition
25 / 97
Page 62
Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
A. Video error_Color error
Adjustment Test pattern - ADJ Key
Established
date
Revised
date
A10
You can view 6 types of patterns using the ADJ Key
4.Video error (Classification of MODULE or Main-B/D!)
26 / 97
Page 63
Appendix : Exchange T-Con Board (1)
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Solder defect, CNT Broken
Solder defect, CNT Broken
Solder defect, CNT Broken
T-Con Defect, CNT Broken
T-Con Defect, CNT Broken
Solder defect, CNT Broken
T-Con Defect, CNT Broken
Solder defect, CNT Broken
Abnormal Power Section
Solder defect, Short/Crack
Abnormal Power Section Solder defect, Short/Crack
27 / 97
Page 64
Appendix : Exchange T-Con Board (2)
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Abnormal Power Section
Solder defect, Short/Crack
Abnormal Power Section
Fuse Open, Abnormal power section
Solder defect, Short/Crack
Abnormal Display
GRADATION
Noise
28 / 97
GRADATION
Page 65
Appendix : Exchange PSU(LED driver)
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
No Light
Dim Light
Dim Light
Dim Light
No picture/Sound Ok
29 / 97
Page 66
Appendix : Exchange the Module (1)
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Panel Mura, Light leakage
Crosstalk
Panel Mura, Light leakage
Press damage
Press damage
Crosstalk
Un-repairable Cases
In this case please exchange the module.
Press damage
30 / 97
Page 67
Appendix : Exchange the Module (2)
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Vertical Block
Source TAB IC Defect
Horizontal Block
Gate TAB IC Defect
Horizontal Block
GateTAB ICDefect
Gate TAB IC Defect
Vertical Line
Source TAB IC Defect
Horizontal Block
GateTAB ICDefect
Gate TAB IC Defect
Vertical Block
Source TAB IC Defect
Horizontal line
GateTAB ICDefect
Gate TAB IC Defect
Un-repairable Cases
In this case please exchange the module.
31 / 97
Page 68
Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
B. Power error _No power
Check front display LED
Established
date
Revised
date
A11
Front LED control :
Menu Option Power Indicator
Standby light ON
ST-BY condition: Red
32 / 97
Page 69
Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
B. Power error _No power
Check power input voltage and ST-BY 3.5V
Established
date
Revised
date
Check the DC 13.2V
Power Board <-> Main Board
1 PWR_ON/OFF 2 PDIM#2
3 GND 4 D13.2V
5 D13.2V 6 D13.2V
A12
7 A13.2V 8 A13.2V
9 GND 10 GND
11 DRV_ON/OFF 12 PDIM#1
33 / 97
Page 70
Standard Repair Process Detail Technical Manual
Power Board <-> Main Board
1
PWR_ON/OFF
2
PDIM#2
3
GND
4
D13.2V
5
D13.2V
6
D13.2V
7
A13.2V
8
A13.2V
9
GND
10
GND
11
DRV_ON/OFF
12
PDIM#1
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
B. Power error _No power
Checking method when power is ON
Established
date
Revised
date
Check “power on(Pin 1)” pin is high(about 3.3V)
A13
34 / 97
Page 71
Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
< Low models >
B. Power error _Off when on, off whiling viewing
POWER OFF MODE checking method
Established
date
Revised
date
A14
Entry method
1. Press the IN-START button of the remote
controller for adjustment
2. Check the entry into adjustment item 3
35 / 97
Page 72
Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
< Low models >
C. Audio error_No audio/Normal video
Checking method in menu when there is no audio
Established
date
Revised
date
A15
Checking method
1. Press the MENU button on the remote controller
2. Select the AUDIO function of the Menu
3. Select TV Speaker from Off to On
36 / 97
Page 73
Power Board <-> Main Board
1
PWR_ON/OFF
2
PDIM#2
3
GND
4
D13.2V
5
D13.2V
6
D13.2V
7
A13.2V
8
A13.2V
9
GND
10
GND
11
DRV_ON/OFF
12
PDIM#1
Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
< Low models >
C. Audio error_No audio/Normal video
Voltage and speaker checking method
when there is no audio
Established
date
Revised
date
A16
②
Checking order when there is no audio
①
③
① Check the contact condition of or 13.2V connector of Main Board
② Measure the 13.2V input voltage supplied from Power Board
(If there is no input voltage, remove and check the connector)
③ Connect the tester 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.
37 / 97
Page 74
Standard Repair Process Detail Technical Manual
Copyright ⓒ 2015 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Error symptom
Content
< Low models >
D. Function error_ No response in remote controller,
key error
Remote controller operation checking method
Established
date
Revised
date
A17
②
Checking order
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.