LG 47LY960H User manual

Printed in KoreaP/NO : MFL67988536 (1411-REV00)
CHASSIS : LD4BZ
MODEL : 47LY960H 47LY960H-ZA
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
LED TV
SERVICE MANUAL
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only

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Only for training and service purposes
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ........................................................................ 3
SERVICING PRECAUTIONS.................................................................... 4
SPECIFICATION ....................................................................................... 6
ADJUSTMENT INSTRUCTION .............................................................. 11
TROUBLE SHOOTING GUIDE............................................................... 19
BLOCK DIAGRAM ................................................................................. 25
EXPLODED VIEW .................................................................................. 26
SCHEMATIC CIRCUIT DIAGRAM ..............................................................

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Only for training and service purposes
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 MΩand 5.2 MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5 mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
IMPORTANT SAFETY NOTICE
SAFETY PRECAUTIONS

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Only for training and service purposes
SERVICING PRECAUTIONS
CAUTION: Before servicing receivers covered by this service
manual and its supplements and addenda, read and follow the
SAFETY PRECAUTIONS on page 3 of this publication.
NOTE: If unforeseen circumstances create conict between the
following servicing precautions and any of the safety precautions
on page 3 of this publication, always follow the safety precau-
tions. Remember: Safety First.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC power
source before;
a. Removing or reinstalling any component, circuit board
module or any other receiver assembly.
b. Disconnecting or reconnecting any receiver electrical plug
or other electrical connection.
c. Connecting a test substitute in parallel with an electrolytic
capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect polarity
installation of electrolytic capacitors may result in an explo-
sion hazard.
2. Test high voltage only by measuring it with an appropriate
high voltage meter or other voltage measuring device (DVM,
FETVOM, etc) equipped with a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this receiver or any of its
assemblies.
4. Unless specied otherwise in this service manual, clean
electrical contacts only by applying the following mixture to the
contacts with a pipe cleaner, cotton-tipped stick or comparable
non-abrasive applicator; 10 % (by volume) Acetone and 90 %
(by volume) isopropyl alcohol (90 % - 99 % strength)
CAUTION: This is a ammable mixture.
Unless specied otherwise in this service manual, lubrication
of contacts in not required.
5. Do not defeat any plug/socket B+ voltage interlocks with which
receivers covered by this service manual might be equipped.
6. Do not apply AC power to this instrument and/or any of its
electrical assemblies unless all solid-state device heat sinks
are correctly installed.
7. Always connect the test receiver ground lead to the receiver
chassis ground before connecting the test receiver positive
lead.
Always remove the test receiver ground lead last.
8. Use with this receiver only the test xtures specied in this
service manual.
CAUTION: Do not connect the test xture ground strap to any
heat sink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged eas-
ily 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 dam-
age 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. Alter-
natively, obtain and wear a commercially available discharg-
ing 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 expo-
sure 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 sol-
der removal devices not classied as “anti-static” can generate
electrical charges sufcient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charges sufcient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install it.
(Most replacement ES devices are packaged with leads elec-
trically 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 mate-
rial to the chassis or circuit assembly into which the device will
be installed.
CAUTION: Be sure no power is applied to the chassis or cir-
cuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replace-
ment ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your
foot from a carpeted oor can generate static electricity suf-
cient to damage an ES device.)
General Soldering Guidelines
1. Use a grounded-tip, low-wattage soldering iron and appropri-
ate 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 wire-
bristle (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 compo-
nent lead and the foil.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
d. Closely inspect the solder area and remove any excess or
splashed solder with a small wire-bristle brush.

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Only for training and service purposes
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent at against the cir-
cuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by
gently prying up on the lead with the soldering iron tip as the
solder melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing
the IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
"Small-Signal" Discrete Transistor
Removal/Replacement
1. Remove the defective transistor by clipping its leads as close
as possible to the component body.
2. Bend into a "U" shape the end of each of three leads remain-
ing 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 pos-
sible to diode body.
2. Bend the two remaining leads perpendicular y to the circuit
board.
3. Observing diode polarity, wrap each lead of the new diode
around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of
the two "original" leads. If they are not shiny, reheat them and
if necessary, apply additional solder.
Fuse and Conventional Resistor
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board hollow
stake.
2. Securely crimp the leads of replacement component around
notch at stake top.
3. Solder the connections.
CAUTION: Maintain original spacing between the replaced
component and adjacent components and the circuit board to
prevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
board causing the foil to separate from or "lift-off" the board. The
following guidelines and procedures should be followed when-
ever 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 connec-
tions).
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 con-
nected 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.

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Only for training and service purposes
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
1. Application range
This specification is applied to the LED TV used LD4BZ
chassis.
2. Requirement for Test
Each part is tested as below without special appointment.
1) Temperature: 25 °C ± 5 °C(77 °F ± 9 °F), CST: 40 °C ± 5 °C
2) Relative Humidity: 65 % ± 10 %
3) Power Voltage
: Standard input voltage (AC 100-240 V~, 50/60 Hz)
* Standard Voltage of each products is marked by models.
4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
5) The receiver must be operated for about 20 minutes prior to
the adjustment.
3. Test method
1) Performance: LGE TV test method followed
2) Demanded other specification
- Safety : CE, IEC specification
- EMC : CE, IEC
4. Model General Specification
No. Item Specication Remarks
1 Market EU(PAL Market-37Countries) DTV & Analog (Total 37 countries)
DTV (MPEG2/4, DVB-T) : 26 countries
Germany, Netherland, Switzerland, Hungary, Austria,
Slovenia, Bulgaria, France, Spain, , Belgium, Luxemburg,
Greece, Czech, Turkey, Moroco, Ireland, Latvia, Estonia,
Lithuania, Poland, Portugal, Romania, Albania, Bosnia,
Slovakia, Beralus
DTV (MPEG2/4, DVB-T2) :11 countries
UK(Ireland), Sweden, Denmark, Finland, Norway, Ukraine,
Kazakhstan
Russia, Italy, Croatia, Serbia
DTV (MPEG2/4, DVB-C) : 37 countries
Germany, Netherland, Switzerland, Hungary, Austria, Slov-
enia, Bulgaria, France, Spain, Italy, Belgium, Russia, Lux-
emburg, Greece, Czech, Croatia, Turkey, Moroco, Ireland,
Latvia, Estonia, Lithuania, Poland, Portugal, Romania,
Albania, Bosnia, Serbia, Slovakia, Beralus, UK, Sweden,
Denmark, Finland, Norway, Ukraine, Kazakhstan
DTV (MPEG2/4,DVB-S) : 37 countries
Germany, Netherland, Switzerland, Hungary, Austria,
Slovenia, Bulgaria, France, Spain,Belgium, Luxemburg,
Greece, Czech, Turkey, Moroco, Ireland, Latvia, Estonia,
Lithuania, Poland, Portugal, Romania, Albania, Bosnia,
Slovakia, Beralus, UK(Ireland), Sweden, Denmark, Finland,
Norway, Ukraine, Kazakhstan,Russia, Italy, Croatia, Serbia

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Only for training and service purposes
No. Item Specication Remarks
1 Market EU(PAL Market-37Countries) Supported satellite : 35 satellites
ABS1 75.0E , AMOS 4.0W , ASIASAT3S 105.5E , AS-
TRA 19.2E , ASTRA 23.5E , ASTRA 28.2E , ASTRA 4.8E,
ATLANTIC BIRD2 8.0W , ATLANTIC BIRD3 5.0W , BADR
26.0E , DIRECTV-1R 56.0E , EUROBIRD 9A 9.0E , EURO-
BIRD3 33.0E , EUTELSAT 36 A/B 36.0E ,
EUTELSAT W2A 10.0E , EUTELSAT W3A 7.0E , EUTEL-
SAT7WA 7.3W
EUTELSAT 16.0E , EXPRESS AM1 40.0E , EXPRESS
AM3 140.0E , EXPRESS AM33 96.5E , HELLASSAT 39.0E
, HISPASAT 1CDE 30.0W
HOTBIRD 13.0E , INTELSAT10&7 68.5E , INTELSAT15
85.2E , INTELSAT1R 50.0W, INTELSAT903 33.5W , IN-
TELSAT904 60.0E
, NILESAT 7.0W , NSS12 57.0E , THOR 0.8W , TURKSAT
42.0E ,
YAMAL201 90.0E , OTHER
2 Television system
1) Digital TV
- DVB-T/T2
- DVB-C
- DVB-S/S2
2) Analogue TV
- PAL/SECAM B/G/I/D/K
- SECAM L/L’
3 Program coverage
1) Digital TV
- VHF, UHF
- C-Band, Ku-Band
2) Analogue TV
- VHF : E2 to E12
- UHF : E21 to E69
- CATV : S1 to S20
- HYPER : S21 to S47
4 Receiving system
Analog : Upper Heterodyne
Digital : COFDM, QAM
► DVB-T
- Guard Interval(Bitrate_Mbit/s)
1/4, 1/8, 1/16, 1/32
- Modulation : Code Rate
QPSK : 1/2, 2/3, 3/4, 5/6, 7/8
16-QAM : 1/2, 2/3, 3/4, 5/6, 7/8
64-QAM : 1/2, 2/3, 3/4, 5/6, 7/8
► DVB-T2
- Guard Interval(Bitrate_Mbit/s)
1/4, 1/8, 1/16, 1/32, 1/128, 19/128, 19/256,
- Modulation : Code Rate
QPSK : 1/2, 2/5, 2/3, 3/4, 5/6
16-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
64-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
256-QAM : 1/2, 2/5, 2/3, 3/4, 5/6
► DVB-C
- Symbolrate :
4.0Msymbols/s to 7.2Msymbols/s
- Modulation :
16QAM, 64-QAM, 128-QAM and 256-QAM
► DVB-S/S2
- Symbol rate
DVB-S2 (8PSK / QPSK) : 2 ~ 45Msymbol/s
DVB-S (QPSK) : 2 ~ 45Msymbol/s
- Viterbi
DVB-S mode : 1/2, 2/3, 3/4, 5/6, 7/8
DVB-S2 mode : 1/2, 2/3, 3/4, 3/5, 4/5, 5/6, 8/9, 9/10

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Only for training and service purposes
No. Item Specication Remarks
5 Scart (1EA) PAL, SECAM Scart jack is Full scart and support
ATV/DTV-OUT
(not support DTV Auto AV)
6 Head phone out Antenna, AV, HDMI1, HDMI2, HDMI3,
USB1, USB2
Only LY96*H-Z* model
7 HDMI Input (2EA)
HDMI1-DTV
HDMI2-DTV
HDMI3-DTV
8 Audio Input (1EA) AV L/R Input
9 SPDIF out (1EA) SPDIF out Optical
10 USB (2EA) EMF, DivX HD, For SVC (download) JPEG, MP3, DivX HD
11 Ethernet Connect (2EA) Ethernet Connect LAN / AUX LAN : Support 100Mbps/10Mbps
(10Mbps support under 10,000 byte packet size)
12 PCMCIA Card slot
(1EA) PCMCIA slot
13 External
Speaker Out(1EA)
14 External Speaker
Volume Control (1EA)
15 External Clock (1EA)
External Clock Support : LY76*, LW76* Model (DSUB
JACK)
LY96*H-Z* Model not support External Clock.
16 Control & Service (1EA) RS232 Jack

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Only for training and service purposes
5. HDMI input
5.1. 3D Mode
- HDMI Input 1.4b (3D supported mode automatically)
No Resolution H-freq(kHz) V-freq(Hz) Pixel clock VIC 3D input proposed mode Proposed
1 640*480 31.469 / 31.5 59.94/ 60 25.175/25.2 1 Top-and-Bottom
Side-by-side(half)
Secondary(SDTV 480P)
Secondary(SDTV 480P)
62.938 / 63 59.94/ 60 50.35/50.4 1 Frame packing
Line alternative
Secondary(SDTV 480P)
(SDTV 480P)
31.469 / 31.5 59.94/ 60 50.35/50.4 1 Side-by-side(Full) (SDTV 480P)
2 720*480 31.469 / 31.5 59.94 / 60 27.00/27.03 2,3 Top-and-Bottom
Side-by-side(half)
Secondary(SDTV 480P)
Secondary(SDTV 480P)
62.938 / 63 59.94 / 60 54/54.06 2,3 Frame packing
Line alternative
Secondary(SDTV 480P)
(SDTV 480P)
31.469 / 31.5 59.94 / 60 54/54.06 2,3 Side-by-side(Full) (SDTV 480P)
3 720*576 31.25 50 27 17,18 Top-and-Bottom
Side-by-side(half)
Secondary(SDTV 576P)
Secondary(SDTV 576P)
62.5 50 54 17,18 Frame packing
Line alternative
Secondary(SDTV 576P)
(SDTV 576P)
31.25 50 54 17,18 Side-by-side(Full) (SDTV 576P)
37.5 50 74.25 19 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 720P)
Primary(HDTV 720P)
75 50 148.5 19 Frame packing
Line alternative
Primary(HDTV 720P)
(HDTV 720P)
37.5 50 148.5 19 Side-by-side(Full) (HDTV 720P)
4 1280*720 44.96 / 45 59.94 / 60 74.18/74.25 4 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 720P)
Primary(HDTV 720P)
89.91 / 90 59.94 / 60 148.35/148.5 4 Frame packing
Line alternative
Primary(HDTV 720P)
(HDTV 720P)
44.96 / 45 59.94 / 60 148.35/148.5 4 Side-by-side(Full) (HDTV 720P)
5 1920*1080 33.72 / 33.75 59.94 / 60 74.18/74.25 5 Top-and-Bottom
Side-by-side(half)
Secondary(HDTV 1080I)
Primary(HDTV 1080I)
67.432 / 67.5 59.94 / 60 148.35/148.5 5 Frame packing
Line alternative
Primary(HDTV 1080I)
(HDTV 1080I)
33.72 / 33.75 59.94 / 60 148.35/148.5 5 Side-by-side(Full) (HDTV 1080I)
28.125 50.00 74.25 20 Top-and-Bottom
Side-by-side(half)
Secondary(HDTV 1080I)
Primary(HDTV 1080I)
56.25 50.00 148.5 20 Frame packing
Line alternative
Primary(HDTV 1080I)
(HDTV 1080I)
28.125 50.00 148.5 20 Side-by-side(Full) (HDTV 1080I)
26.97 / 27 23.97 / 24 74.18/74.25 32 Top-and-Botto m
Side-by-side(half)
Primary(HDTV 1080P)
Primary(HDTV 1080P)
43.94 / 54 23.97 / 24 148.35/148.5 32 Frame packing
Line alternative
Primary(HDTV 1080P)
(HDTV 1080P)
26.97 / 27 23.97 / 24 148.35/148.5 32 Side-by-side(Full) (HDTV 1080P)
28.125 25 74.25 33 Top-and-Botto m
Side-by-side(half)
Secondary(HDTV 1080P)
Secondary(HDTV 1080P)
56.25 25 148.5 33 Frame packing
Line alternative
Secondary(HDTV 1080P)
(HDTV 1080P)
28.125 25 148.5 33 Side-by-side(Full) (HDTV 1080P)

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Only for training and service purposes
No Resolution H-freq(kHz) V-freq(Hz) Pixel clock VIC 3D input proposed mode Proposed
33.716 / 33.75 29.976 / 30.00 74.18/74.25 34 Top-and-Botto m
Side-by-side(half)
Primary(HDTV 1080P)
Secondary(HDTV 1080P)
67.432 / 67.5 29.976 / 30.00 148.35/148.5 34 Frame packing
Line alternative
Primary(HDTV 1080P)
(HDTV 1080P)
33.716 / 33.75 29.976 / 30.00 148.35/148.5 34 Side-by-side(Full) (HDTV 1080P)
56.25 50 148.5 31 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 1080P)
Secondary(HDTV 1080P)
67.43 / 67.5 59.94 / 60 148.35/148.50 16 Top-and-Bottom
Side-by-side(half)
Primary(HDTV 1080P)
Secondary(HDTV 1080P)
No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock Proposed 3D input proposed mode
1 720*480 31.5 60 27.03 SDTV 480P
2D to 3D, Side by Side(Half), Top & Bottom,
Checker Board, Frame Sequential, Row Inter-
leaving, Column Interleaving
2 720*576 31.25 50 27 SDTV 576P
3 1280*720 45.00 60.00 74.25 HDTV 720P
4 1280*720 37.500 50 74.25 HDTV 720P
5 1920*1080 33.75 60.00 74.25 HDTV 1080I 2D to 3D, Side by Side(Half), Top & Bottom
6 1920*1080 28.125 50.00 74.25 HDTV 1080I
7 1920*1080 27.00 24.00 74.25 HDTV 1080P 2D to 3D, Side by Side(Half), Top & Bottom,
Checker Board, Row Interleaving, Column
Interleaving
8 1920*1080 28.12 25 74.25 HDTV 1080P
9 1920*1080 33.75 30.00 74.25 HDTV 1080P
10 1920*1080 67.50 60.00 148.5 HDTV 1080P 2D to 3D, Side by Side(Half), Top & Bottom,
Checker Board, Single Frame Sequential,
Row Interleaving, Column Interleaving
11 1920*1080 56.250 50 148.5 HDTV 1080P
5.2. HDMI Input(1.3)
No. Resolution H-freq(kHz) V-freq(Hz) Pixel clock 3D input proposed mode Proposed
1 1024*768 48.36 60 65 2D to 3D,Side by Side(half)
Top & Bottom
HDTV 768P
2 1360*768 47.71 60 85.5 HDTV 768P
3 1920*1080 67.500 60 148.50
2D to 3D, Side by Side(half)
Top & Bottom, Checker Board,
Single Frame Sequential
Row Interleaving, Column Interleaving
HDTV 1080P
4 Others
2D to 3D,
Side by Side(half)
Top & Bottom
640*350
720*400
640*480
800*600
1152*864
5.2.1. HDMI-PC Input(3D supported mode manually)

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ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LED LCD TV
with LD4BZ chassis.
2. Designation
(1) Because this is not a hot chassis, it is not necessary to
use an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
25 °C ± 5 °C of temperature and 65 % ± 10 % of relative
humidity if there is no specific designation.
(4) The input voltage of the receiver must keep AC 100-240
V~, 50/60 Hz.
(5) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
15.
In case of keeping module is in the circumstance of 0 °C, it
should be placed in the circumstance of above 15 °C for 2
hours.
In case of keeping module is in the circumstance of below
-20 °C, it should be placed in the circumstance of above 15
°C for 3 hours.
[Caution]
When still image is displayed for a period of 20 minutes or
longer (Especially where W/B scale is strong. Digital pattern
13ch and/or Cross hatch pattern 09ch), there can some
afterimage in the black level area.
3. Automatic Adjustment
3.1. MAC address D/L , CI+ key D/L, Widevine
key D/L, ESN D/L, HDCP14/20 D/L
Connect: USB port
Communication Prot connection
▪ Com 1,2,3,4 and 115200(Baudrate)
Mode check: Online Only
▪ Check the test process:
DETECT -> MAC -> ESN(Must download commercial-only
ESN KEY) -> -> Widevine -> CI -> HDCP14 -> HDCP20
▪ Play : Press Enter key
▪ Result : Ready, Test, OK or NG
▪ Printer Out (MAC Address Label)
3.2. LAN Inspection
3.2.1. Equipment & Condition
▪ Each other connection to LAN Port of IP Hub and Jig
3.2.2. LAN inspection solution
▪ LAN Port connection with PCB
▪ Setting automatic IP
▪ If you want manual connection, enter Network connection at
MENU Mode of TV. Press Start connection key, then
Network will be connected.
3.2.3. WIDEVINE key Inspection
- Confirm key input data at the "IN START" MENU Mode.

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3.3. LAN PORT INSPECTION(PING TEST)
Connect SET → LAN port == PC → LAN Port
3.3.1. Equipment setting
(1) Play the LAN Port Test PROGRAM.
(2) Input IP set up for an inspection to Test Program.
*IP Number : 12.12.2.2
3.3.2. LAN PORT inspection(PING TEST)
(1) Play the LAN Port Test Program.
(2) Connect each other LAN Port Jack.
(3) Play Test (F9) button and confirm OK Message.
(4) Remove LAN cable.
3.4. Model name & Serial number Download
3.4.1. Model name & Serial number D/L
▪Press "Power on" key of service remote control.
(Baud rate : 115200 bps)
▪Connect RS-232C Signal to USB Cable to USB.
▪Write Serial number by use USB port.
▪Must check the serial number at Instart menu.
3.4.2. Method & notice
(1) Serial number D/L is using of scan equipment.
(2) Setting of scan equipment operated by Manufacturing
Technology Group.
(3) Serial number D/L must be conformed when it is produced
in production line, because serial number D/L is mandatory
by D-book 4.0.
* Manual Download (Model Name and Serial Number)
If the TV set is downloaded by OTA or service man, sometimes
model name or serial number is initialized.(Not always)
It is impossible to download by bar code scan, so It need
Manual download.
1) Press the "Instart" key of Adjustment remote control.
2) Go to the menu "7.Model Number D/L" like below photo.
3) Input the Factory model name(ex 42LY760H-ZA) or Serial
number like photo.
4) Check the model name Instart menu. → Factory name
displayed. (ex 42LY760H-ZA)
5) Check the Diagnostics.(DTV country only) → Buyer
model displayed. (ex 42LY760H-ZA)
3.5. CI+ Key checking method
Check whether the key was downloaded or not at ‘In Start’
menu. (Refer to below).
=> Check the Download to CI+ Key value in LGset.
3.5.1. Check the method of CI+ Key value
(1) Check the method on Instart menu
(2) Check the method of RS232C Command
1) Into the main ass’y mode(RS232: aa 00 00)
2) Check the key download for transmitted command
(RS232: ci 00 10)
3) Result value
- Normally status for download : OKx
- Abnormally status for download : NGx
3.5.2. Check the method of CI+ key value(RS232)
1) Into the main ass’y mode(RS232: aa 00 00)
2) Check the mothed of CI+ key by command
(RS232: ci 00 20)
3) Result value
i 01 OK 1d1852d21c1ed5dcx
3.6. WIFI MAC ADDRESS CHECK
(1) Using RS232 Command
(2) Check the menu on in-start
SET PC
H-freq(kHz) V-freq.(Hz)
Transmission [A][I][][Set ID][][20][Cr] [O][K][X] or [NG]
CMD 1 CMD 2 Data 0
A A 0 0
CMD 1 CMD 2 Data 0
C I 1 0
CMD 1 CMD 2 Data 0
A A 0 0
CMD 1 CMD 2 Data 0
C I 2 0
CI+ Key Value

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3.7. HDCP CHECK
(1) HDCP 1.4/2.0 KEY Download
(2) In-start -> Check the HDCP1.4, HDCP2.0 LIST(OK or NG)
4. Manual Adjustment
* ADC adjustment is not needed because of OTP(Auto ADC
adjustment)
4.1. EDID DATA
4.1.1. 3D EDID
▪ Reference
- HDMI1 ~ HDMI2
- In the data of EDID, bellows may be different by S/W or
Input mode.
ⓐProduct ID
ⓑSerial No: Controlled on production line.
ⓒMonth, Year: Controlled on production line:
ex) Monthly : ‘01’ → ‘01’
Year : ‘2014’ → ‘18’
ⓓModel Name(Hex): LGTV
ⓔChecksum(LG TV): Changeable by total EDID data.
ⓕVendor Specific(HDMI)
1) Deep color (module 10bit)
2) None deep color (module 8bit)
ⓖColorimetry Data Block(HDMI)
4.2. White Balance Adjustment
4.2.1. Overview
▪ W/B adj. Objective & How-it-works
(1) Objective: To reduce each Panel's W/B deviation
(2) How-it-works : When R/G/B gain in the OSD is at 192, it
means the panel is at its Full Dynamic Range. In order to
prevent saturation of Full Dynamic range and data, one
of R/G/B is fixed at 192, and the other two is lowered to
find the desired value.
(3) Adjustment condition : normal temperature
1) Surrounding Temperature : 25 °C ± 5 °C
2) Warm-up time: About 5 Min
3) Surrounding Humidity : 20 % ~ 80 %
4.2.2. Equipment
(1) Color Analyzer: CA-210 (LED Module : CH 14)
(2) Adjustment Computer(During auto adj., RS-232C protocol
is needed)
(3) Adjustment Remote control
(4) Video Signal Generator MSPG-925F 720p/204-Gray
(Model: 217, Pattern: 49)
→ Only when internal pattern is not available
▪ Color Analyzer Matrix should be calibrated using CS-100.
HEX EDID Table DDC Function
0001 0100 Analog
0001 0100 Digital
Chassis MODEL NAME(HEX)
LD4BZ 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20
ⓔ1ⓔ2
10bit/none XvYcc
ⓔ2
8bit/none XvYcc ⓔ3
HDMI1 E7 85 CC X
HDMI2 E7 75 BC X
HDMI3 E7 65 AC X
INPUT MODEL NAME(HEX)
HDMI1 78 03 0C 00 10 00 B8 2D 20 C0 0E 01 4F 3F FC 08 10 18 10
06 10 16 10 28 10
HDMI2 78 03 0C 00 20 00 B8 2D 20 C0 0E 01 4F 3F FC 08 10 18 10
06 10 16 10 28 10
HDMI3 78 03 0C 00 30 00 B8 2D 20 C0 0E 01 4F 3F FC 08 10 18 10
06 10 16 10 28 10
INPUT MODEL NAME(HEX)
HDMI1 78 03 0C 00 10 00 80 1E 20 C0 0E 01 4F 3F FC 08 10 18 10
06 10 16 10 28 10
HDMI2 78 03 0C 00 20 00 80 1E 20 C0 0E 01 4F 3F FC 08 10 18 10
06 10 16 10 28 10
HDMI3 78 03 0C 00 30 00 80 1E 20 C0 0E 01 4F 3F FC 08 10 18 10
06 10 16 10 28 10
INPUT MODEL NAME(HEX)
HDMI1 E3 05 00 00
HDMI2 E3 05 00 00
HDMI3 E3 05 00 00

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4.2.3. Equipment connection MAP
4.2.4. Adj. Command (Protocol)
<Command Format>
- LEN: Number of Data Byte to be sent
- CMD: Command
- VAL: FOS Data value
- CS: Checksum of sent data
- A: Acknowledge
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX]
▪ RS-232C Command used during auto-adjustment.
Ex) wb 00 00 -> Begin white balance auto-adj.
wb 00 10 -> Gain adj.
ja 00 ff -> Adj. data
jb 00 c0
...
...
wb 00 1f → Gain adj. completed
*(wb 00 20(Start), wb 00 2f(end)) → Off-set adj.
wb 00 ff → End white balance auto-adj.
▪ Adj. Map
4.2.5. Adj. method
(1) Auto adj. method
1) Set TV in adj. mode using P-ONLY key(or POWER ON
key).
2) Zero calibrate probe then place it on the center of the
Display.
3) Connect Cable.(RS-232C to USB)
4) Select mode in adj. Program and begin adj.
5) When adj. is complete (OK Sign), check adj. status pre
mode. (Cool, Medium, Warm)
6) Remove probe and RS-232C cable to complete adj.
▪ W/B Adj. must begin as start command “wb 00 00” , and
finish as end command “wb 00 ff”, and Adj. offset if need.
(2) Manual adjustment. method
1) Set TV in Adj. mode using P-Only key.
2) Zero Calibrate the probe of Color Analyzer, then place it
on the center of LCD module within 10 cm of the surface.
3) Press ADJ key → EZ adjust using adj. R/C → 7. White-
Balance then press the cursor to the right(key ►).
(When right key(►) is pressed 204 Gray internal pattern
will be displayed)
4) One of R Gain / G Gain / B Gain should be fixed at 192,
and the rest will be lowered to meet the desired value.
5) Adjustment is performed in COOL, MEDIUM, WARM 3
modes of color temperature.
- If internal pattern is not available, use RF input. In EZ
Adj. menu 7.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 204 Gray pattern.
▪ Adjustment condition and cautionary items
1) Lighting condition in surrounding area
Surrounding lighting should be lower 10 lux. Try to isolate
adj. area into dark surrounding.
2) Probe location
: Color Analyzer(CA-210) probe should be within 10 cm and
perpendicular of the module surface (80° ~ 100°)
4.2.6. Reference (White balance Adj. coordinate and
color temperature)
▪ Luminance : 204 Gray
▪ Standard color coordinate and temperature using CS-1000
(over 26 inch)
▪ Standard color coordinate and temperature using CA-210
(CH 14)
RS-232C COMMAND
[CMD ID DATA] Explanation
wb 00 00 Begin White Balance adjustment
wb 00 10 Gain adjustment(internal white pattern)
wb 00 1f Gain adjustment completed
wb 00 20 Offset adjustment(internal white pattern)
wb 00 2f Offset adjustment completed
wb 00 ff End White Balance adjustment
(internal pattern disappears )
Adj. item Command
(lower caseASCII)
Data Range
(Hex.)
Default
(Decimal)
CMD1 CMD2 MIN MAX
Cool
R Gain j g 00 C0
G Gain j h 00 C0
B Gain j i 00 C0
R Cut
G Cut
B Cut
Medium
R Gain j a 00 C0
G Gain j b 00 C0
B Gain j c 00 C0
R Cut
G Cut
B Cut
Warm
R Gain j d 00 C0
G Gain j e 00 C0
B Gain j f 00 C0
R Cut
G Cut
Mode Coordinate Temp ∆uv
x y
Cool 0.271 0.270 13,000 K 0.0000
Medium 0.286 0.289 9,300 K 0.0000
Warm 0.313 0.329 6,500 K 0.0000
Mode Coordinate Temp ∆uv
x y
Cool 0.271 ± 0.002 0.270 ± 0.002 13,000 K 0.0000
Medium 0.286 ± 0.002 0.289 ± 0.002 9,300 K 0.0000
Warm 0.313 ± 0.002 0.329 ± 0.002 6,500 K 0.0000
START 6E A 50 A LEN A 03 A CMD A 00 A VAL A CS STOP
Co l o r An al yze r
Co m p u te r
Pa t t ern G en e ra t o r
RS - 23 2 C
RS-232C
RS-232C
Probe
Signal Source
* If TV internal pattern is used, not needed

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4.2.7. LED White balance table
▪ Edge LED module change color coordinate because of
aging time
▪ apply under the color coordinate table, for compensated
aging time
Only march to December.
(normal line) LGD Module
Only January to Febuary.
(normal line) LGD Module
** O/S Module(INX, AUO, Sharp, CSOT, BOE)
(Cool Mode Spec : 13000K)
4.3. Local Dimming Inspection.
(1) Press ‘TILT” key of the Adj. R/C and check moving
patterns. The black bar patterns moves from top to bottom.
If a local dimming function does not work, a whole screen
shows full white.
4.4. Magic Motion remote controller Check
- Results are automatically marked in Instart OSD after
through the AP/Magic Remocon Equipment on the line
MTK
Aging
time(Min)
Cool Medium Warm
X y x y x y
Target 271 270 286 289 313 329
1 0-2 282 289 297 308 324 348
2 3-5 281 287 296 306 323 346
3 6-9 279 284 294 303 321 343
4 10-19 277 280 292 299 319 339
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
Cool Medium Warm
X y x y x y
spec 271 270 286 289 313 329
target 278 280 293 299 320 339
MTK
Aging
time(Min)
Cool Medium Warm
X y x y x y
Target 271 270 286 289 313 329
1 0-2 286 295 301 314 328 354
2 3-5 284 290 299 309 326 349
3 6-9 282 287 297 306 324 346
4 10-19 279 283 294 302 321 342
5 20-35 276 278 291 297 318 337
6 36-49 274 275 289 294 316 334
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

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4.5. Function Inspect
4.5.1. 3D function test
(1) Pattern Generator MSHG-600 or MSPG-6100 (HDMI 1.4
support)
(2) Pattern: HDMI mode (model No. 872, pattern No. 83)
4.5.2. Test method
(1) Please input 3D test pattern like below (HDMI mode NO.
872 , pattern No.83)
(2) When 3D OSD appear automatically , then select green
button.
(3) Don’t wear a 3D Glasses, Check the picture like below .
4.6. HDMI ARC Function Inspection
4.6.1. Test equipment
- Optic Receiver Speaker
- MSHG-600 (SW: 1220 ↑)
- HDMI Cable (for 1.4 version)
4.6.2. Test method
(1) Insert the HDMI Cable to the HDMI ARC port from the
master equipment(HDMI1)
(2) Check the sound from the TV Set.
(3) Check the Sound from the Speaker or using AV & Optic
TEST program. (It’s connected to MSHG-600)
* Remark: Inspect in Power Only Mode and check SW version
in a master equipment
HDMI Mode 872, Pattern No.83
After 3D mode Enable – without 3D glasses

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4.7. EYE-Q Green Function Inspection
Step 1) Turn on the TV..
Step 2) Press 'EYE button' on the adjustment remote-
controller.
Step 3) Cover 'Eye Q sensor' on the front of set with your
hands, hold it for 6 seconds.
Step 4) Check "the Sensor Data" on the screen, make certain
that Data is below 10. If Data isn’t below 10 in 6
seconds, Eye Q sensor would be bad. You should
change Eye Q sensor.
Step 5) Uncover your hands from Eye Q sensor, hold it for 6
seconds.
Step 6) Check "Back Light (xxx)" on the screen, check data
increase . You should change Eye Q sensor.
4.8. Wi-Fi Test
Step 1) Turn on TV
Step 2) Select Wi-Fi Connection option in Network Menu.
Step 3) Click Off Button to On in Wi-Fi Connection.
Step 4) The system finds any AP like blow PIC. well.
Step 5) Select the AP you want to connect.
4.9. LNB voltage and 22KHz tone check
(only for DVB-S/S2 model)
4.9.1. Test method
(1) Set TV in Adj. mode using POWER ON.
(2) Connect cable between satellite ANT and test JIG.
(3) Press Yellow Key (ETC+SWAP) in Adj Remocon to make
LNB on.
(4) check LED light ‘ON’ at 18V menu.
(5) check LED light ‘ON’ at 22KHz tone menu.
(6) Press Blue Key (ETC+PIP INPUT) in Adj Remocon to
make LNB off.
(7) check LED light ‘OFF’ at 18V menu.
(8) check LED light ‘OFF’ at 22KHz tone menu.
4.9.2. Test result
(1) After press LNB On key, ‘18V LED’ and ‘22KHz tone LED’
should be ON.
(2) After press LNB OFF key, ‘18V LED’ and ‘22KHz tone
LED’ should be OFF.
4.10. Option selection per country
4.10.1 Overview
▪ Option selection is only done for models in Non-EU
4.10.2 Method
(1) Press ADJ key on the Adj. R/C, then select Country Group
Meun
(2) Select Country Group Code 04 or Country Group EU.

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5. Tool option selection and Ship-out
mode and GND/Hi-pot check
5.1. Tool Option selection
▪ Method: Press Adj. key on the Adj. R/C, then select Tool
option.
5.2. Ship-out mode check (In-stop)
▪ After final inspection, press In-Stop key of the Adj. R/C and
check that the unit goes to Stand-by mode.
5.3. GND and Hi-pot auto-check
5.3.1. Method
(1) GND & Hi-pot auto-check preparation
- Check that Power Cord is fully inserted to the SET. (If
loose, re-insert)
(2) Perform GND & Hi-pot auto-check
- Unit fully inserted Power cord, Antenna cable and A/V
arrive to the auto-check process.
- Connect D-terminal to AV JACK TESTER
- Auto CONTROLLER(GWS103-4) ON
- Perform GND TEST
- If NG, Buzzer will sound to inform the operator.
- If OK, changeover to I/P check automatically.
(Remove CORD, A/V form AV JACK BOX)
- Perform I/P test
- If NG, Buzzer will sound to inform the operator.
- If OK, Good lamp will lit up and the stopper will allow the
pallet to move on to next process.
5.3.2. Checkpoint
▪ TEST voltage
- GND: 1.5 KV / min at 100 mA
- SIGNAL: 3 KV / min at 100 mA
▪ TEST time: 1 second
▪ TEST POINT
- GND TEST = POWER CORD GND & SIGNAL CABLE
METAL GND
- Hi-pot TEST = POWER CORD GND & LIVE & NEUTRAL
▪ LEAKAGE CURRENT: At 0.5 mArms
6. Audio
Measurement condition:
1. RF input: Mono, 1KHz sine wave signal, 100% Modulation
2. CVBS, Component: 1KHz sine wave signal 0.5Vrms
7. Check Commercial features
7.1. External SPK Out
7.1.1. Equipment & Condition
▪ Jig (Speaker out JIG) or Oscilloscope
7.1.2. Check the speaker out
(1) Connect external speaker to speaker out port with phone
jack on TV side as below.
(2) Check the Max. speaker output is 1W or not. Sine wave
with 1KHz will be displayed.
(3) Press Vol. control button up/down in turns and check the
waveform of Oscilloscope.
Mode info. Commercial Feature
Name IR Out DC Power Out
(5V/ 12V) Ext SPK Out External Clock Pro:Idiom
LY96*H O O O XO
Button of Vol. control Waveform of Oscilloscope
UP(+)
DOWN(-)
No. Item Min Typ Max Unit Remark
1.
Audio practical
max Output, L/R
(Distortion=10%
max Output)
910 12 W
EQ Off
AVL Off
Clear Voice Off
8.10 10.8 Vrms
2. Speaker (8 Ω
Impedance) 910 12 W

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7.2. IR Out and DC Power Outlet (5V/12V)
7.2.1. Equipment & Condition
▪ Simple Jig (commercial check JIG)
▪ Power only mode
(1) Connect each other RS232C port on the Commercial
Check JIG.
(2) Press any key on SVC Remote-control.
(3) Check the LED status of the Check JIG.
- IR LED(OK condition: blinking) (LED #1)
7.2.2. DC Power Outlet Equipment & Condition
▪ Simple Jig (commercial check JIG)
(1) Connect JIG for inspection to RS-232C port on TV as
below.
(2) Enter the Configuration Setup mode in pressing Remote
control keys.
The method to enter Configuration Setup mode :
IN-START → MENU → Configuration Setup → OK
2-1) Select 5V DC Power Outlet and change the setting :
No → Yes. After that, check LED color in JIG.(LED #1)
2-2) After checking 5V DC Power Outlet, change the
setting : Yes → No.
2-3) Please check 12V DC Power Outlet in the same
procedure.
7.2.3. Pro:Idiom Check
(1) Connect the RF Cable
(2) Turn to the Pro:Idiom channel (No. 333)
(3) Check the video & sound
** Only displayed at “POWER ONLY” mode
#1
#1

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TROUBLE SHOOTING GUIDE
1. Power-Up Boot Fail Trouble Shooting guide
Check P2301 All
Voltage Level (3.5V, 12V, 24V)
Y
N
Check Q2302 output Voltage(12V)
Y
Check LVDS Cable
Y
Check LCD Module
Control board
Check power connector and
RL_ON signal OK ?
N
Replace Power Board
Check Q2302 application circuit
Or replace Q2302
N
Replace Cable
N
Y
2. No OSD Trouble Shooting guide
Check P2301 All
Voltage Level (3.5V, 12V, 24V)
Y
N
Check IC8700 RESET pin
Y
Check X8701 Clock
10MHz
Y
Check IC8700 IIC
Communication status
Y
Check IR input state of IC8700
13pin
Y
Re-download NEC Micom
Check power connector and
RL_ON signal OK ?
N
Replace Power Board
Check switch SW8700,
N
Check X8701 application circuit
or Replace X8701
Check IIC line or replace IC8700
Check IR board
N
N
N