LG 32LF595Z User manual

Printed in KoreaP/NO : MFL69330502 (1507-REV00)
CHASSIS : LB50H
MODEL : 32LF595B/595D/595Z
32LF595B/595D/595Z-TA
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 ................................................................ 9
BLOCK DIAGRAM.................................................................................. 16
EXPLODED VIEW .................................................................................. 20
SCHEMATIC CIRCUIT DIAGRAM ........................................... APPENDIX
TROUBLE SHOOTING GUIDE................................................. APPENDIX

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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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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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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 LB50H
chassis.
2. Requirement for Test
Each part is tested as below without special notice
(1) Operating Temperature : 0 °C to 40 °C
(2) Operating Humidity : Less than 80%
(3) Storage Temperature : -20 °C to 60 °C
(4) Storage Humidity : Less than 85%
(5) Power Voltage
: Standard input voltage (AC 100~240V~, 50/60Hz)
Standard Voltage of each product is marked by models
(6) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM .
(7) The receiver must be operated for about 5 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 specification
- Wireless : Wireless HD Specification (Option)
4. Model General Specification
No. Item Specication Remarks
1 Market Asia, Oceania, Africa, Middle East(PAL/DVB Market)
2 Television system
1) Digital TV
DVB-T/T2
2) Analogue TV
PAL B/B, PAL B/G, PAL D/K, PAL-I
SECAM B/G, SECAM D/K
NTSC-M
3 Channel Storage ATV / DVB-T/T2 : 1,500EA
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
5 Video Input RCA PAL, SECAM, NTSC 4 System : PAL, SECAM, NTSC, PAL60
6 Component Input Y/Pb/Pr
7 Head phone out Antenna, AV, Component, HDMI1/2, USB1/2
8 HDMI Input HDMI1-DTV,HDMI2-DTV PC(HDMI Ver. 1.4), Support HDCP
9 Audio Input DVI Audio, Component, AV1
10 SPDIF out SPDIF out
11 USB Input For My Media(Movie/Photo/Music List) or For SVC

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5. External Input Support Format
5.1. Component (Y, CB/PB, CR/PR)
No. Resolution H-freq(kHz) V-freq(Hz) Proposed
1 720×480 15.73 59.94 SDTV, DVD 480i
2 720×480 15.73 60.00 SDTV, DVD 480i
3 720×480 31.47 59.94 480p
4 720×480 31.50 60.00 480p
5 720×576 15.62 50.00 SDTV, DVD 625 Line
6 720×576 31.25 50.00 HDTV 576p
7 1280×720 45.00 50.00 HDTV 720p
8 1280×720 44.96 59.94 HDTV 720p
9 1280×720 45.00 60.00 HDTV 720p
10 1920×1080 28.12 50.00 HDTV 1080i
11 1920×1080 33.72 59.94 HDTV 1080i
12 1920×1080 33.75 60.00 HDTV 1080i
13 1920×1080 56.25 50.00 HDTV 1080p
14 1920×1080 67.43 59.94 HDTV 1080p
15 1920×1080 67.5 60.00 HDTV 1080p

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5.2. HDMI input
(1) DTV mode
No. Resolution H-freq(kHz) V-freq.(kHz) Proposed Remarks
1 640*480 31.46 59.94 SDTV 480P
2 648*480 31.50 60.00 SDTV 480P
3 720*480 15.73 59.94 SDTV, DVD 480I(525I)
Spec. out but display4 720*480 15.75 60.00 SDTV, DVD 480I(525I)
5 720*576 15.62 50.00 SDTV, DVD 576I(625I) 50Hz
6 720*480 31.47 59.94 SDTV 480P
7 720*480 31.50 60.00 SDTV 480P
8 720*576 31.25 50.00 SDTV 576P
9 1280*720 37.50 50.00 HDTV 720P
10 1280*720 44.96 59.94 HDTV 720P
11 1280*720 45.00 60.00 HDTV 720P
12 1920*1080 28.12 50.00 HDTV 1080I
13 1920*1080 33.72 59.94 HDTV 1080I
14 1920*1080 33.75 60.00 HDTV 1080I
15 1920*1080 26.97 23.97 HDTV 1080P
16 1920*1080 27.00 24.00 HDTV 1080P
17 1920*1080 33.71 29.97 HDTV 1080P
18 1920*1080 33.75 30.00 HDTV 1080P
19 1920*1080 56.25 50.00 HDTV 1080P
20 1920*1080 67.43 59.94 HDTV 1080P
21 1920*1080 67.50 60.00 HDTV 1080P
(2) PC mode
No. Resolution H-freq(kHz) V-freq.(kHz) Proposed Remarks
1 640 x 350 @70Hz 31.46 70.09 EGA
2 720 x 400 @70Hz 31.46 70.08 DOS
3 640 x 480 @60Hz 31.46 59.94 VESA(VGA)
4 800 x 600 @60Hz 37.87 60.31 VESA(SVGA)
5 1024 x 768 @60Hz 48.36 60.00 VESA(XGA)
6 1152 x 864 @60Hz 54.34 60.05 VESA
7 1280 x 1024 @60Hz 63.98 60.02 VESA(SXGA) FHD only
8 1360 x 768 @60Hz 47.71 60.01 VESA(WXGA)
9 1920 x 1080 @60Hz 67.50 60.00 WUXGA(CEA 861D) FHD only

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ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LED TV with
LB50H 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 °C.
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, Widevine key D/L,
ESN key D/L, HDCP14/20 key 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→Widevine→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 automatic setting is finished, you confirm IP and MAC
Address.
3.2.3. MAC address and 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 "P-ONLY" 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 47LB650V-ZA) or Serial
number like photo.
4) Check the model name Instart menu. → Factory name
displayed. (ex 47LB650V-ZA)
5) Check the Diagnostics.(DTV country only) → Buyer
model displayed. (ex 47LB650V-ZA)
3.5. WIFI MAC ADDRESS CHECK
(1) Using RS232 Command
Command Set ACK
Transmission [A][l][][Set ID][][20][Cr] [O][K][x] or [N][G]
(2) Check the menu on in-start
SET PC

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4. Manual Adjustment
* ADC adjustment is not needed because of OTP(Auto ADC
adjustment)
4.1. EDID DATA
4.1.1. 2D 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 : ‘2015’ → ‘19’
ⓓModel Name(Hex): LGTV
ⓔChecksum(LG TV): Changeable by total EDID data.
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) Before White balance adjustment, Keep power on
status, don’t power off
4.2.2. Adj. 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°)
(3) Aging time
1) After Aging Start, Keep the Power ON status during 5
Minutes.
2) In case of LCD, Back-light on should be checked using
no signal or Full-white pattern.
4.2.3. Equipment
(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:
CH14)
(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)
▪ Color Analyzer Matrix should be calibrated using CS-1000.
4.2.4. Equipment connection MAP
HEX EDID Table DDC Function
0001 0100 Analog
0001 0100 Digital
Chassis MODEL NAME(HEX)
LB50H 00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20
ⓔ1ⓔ2
8bit
HDMI1 74 E2
HDMI2 74 D2
Color Analyzer
Computer
* Pattern Generator
RS-232C
USB to RS-232C RS-232C
Probe
Signal Source
* If TV internal pattern is used, not needed

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4.2.5. 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
4.2.6. Adjustment method
(1) Auto adjustment method
1) Set TV in adj. mode using P-Only key(or POWER ON key).
2) Place optical probe on the center of the display.
- It need to check probe condition of zero calibration
before adjustment.
3) Connect RS-232C Cable.
4) Select mode in ADJ Program and begin a adjustment
5) When WB adjustment is completed with OK message,
check adjustment status of pre-set mode(Cool, Medium,
Warm)
6) Remove probe and RS-232C cable.
▪ W/B Adj. must begin as start command “wb 00 00” , and
finish as end command “wb 00 ff”, and Adj. offset if need.
(2) Manual adjustment method
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 10 cm of the surface.
3) Press ADJ key → EZ adjust using adj. R/C → 11. White-
Balance then press the cursor to the right(key ►).
When right key(►) is pressed 206 Gray internal pattern
will be displayed
4) Adjust Cool modes
①Fix 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 , Adjust is O.K.)
②If 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.
③If 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
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 control.
■ Adj. 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°)
4.2.7. Reference (White balance Adj. coordinate and
color temperature)
▪ Luminance : 204 Gray
▪ Standard color coordinate and temperature using CS-1000
▪ Standard color coordinate and temperature using CA-210(CH 14)
START 6E A 50 A LEN A 03 A CMD A 00 A VAL A CS STOP
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 13000 K 0.0000
Medium 0.286 0.289 9300 K 0.0000
Warm 0.313 0.329 6500 K 0.0000
Mode Coordinate Temp ∆uv
x y
Cool 0.271 ± 0.002 0.270 ± 0.002 13000 K 0.0000
Medium 0.286 ± 0.002 0.289 ± 0.002 9300 K 0.0000
Warm 0.313 ± 0.002 0.329 ± 0.002 6500K 0.0000

- 13 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4.2.8. 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 & Global
Model: (normal line)LGD
Only January to Febuary & Global
Model: (normal line)LGD
O/S Module (AUO, INX, Sharp, CSOT, BOE) (Cool : 13000 K)
4.3. Function Inspect
4.3.1. HDMI ARC Function Inspection
(1) Test equipment
- Optic Receiver Speaker
- MSHG-600 (SW: 1220 ↑)
- HDMI Cable (for 1.4 version)
(2) Test method
1) Insert the HDMI Cable to the HDMI ARC port from the
master equipment (HDMI 1)
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
NC4.0
Aging
time
(Min)
Cool Medium Warm
x y x y x y
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 6-9 279 284 294 303 321 333
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
NC4.0
Aging
time
(Min)
Cool Medium Warm
x y x y x y
271 270 286 289 313 329
1 0-5 286 295 301 314 328 354
2 6-10 284 290 299 309 326 349
3 11-20 282 287 297 306 324 346
4 21-30 279 283 294 302 321 342
5 31-40 276 278 291 297 318 337
6 41-50 274 275 289 294 316 334
7 51-80 273 272 288 291 315 331
8 81-119 272 271 287 290 314 330
9 Over 120 271 270 286 289 313 329
NC4.0 Cool Medium Warm
x y x y x y
spec 271 270 286 289 313 329
target 278 280 293 299 320 339

- 14 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4.4. Wi-Fi Test
Step 1) Turn on TV
Step 2) Select Wi-Fi Connection menu in Network Menu.
Step 3) The system finds any AP like blow PIC.
Step4) Select the AP you want to connect.
5. Tool Option selection
▪ Method : Press "ADJ" key on the Adjustment remote control,
then select Tool option.
6. Ship-out mode check(In-stop)
After final inspection, press "IN-STOP" key of the Adjustment
remote control and check that the unit goes to Stand-by mode.
7. GND and Internal Pressure check
7.1. Method
(1) GND & Internal Pressure auto-check preparation
- Check that Power cord is fully inserted to the SET.
(If loose, re-insert)
(2) Perform GND & Internal Pressure 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.
7.2. Checkpoint
▪ TEST voltage
(1) DQA Test
- GND: 1.5 KV / min at 100 mA
- SIGNAL: 3 KV / min at 100 mA
(2) Mass Production Line Test
- GND: AC 1.5 KV / sec, Cut off current not exceed 100 mA
▪ TEST time: DQA 1 min, Mass Production Line 1 sec
▪ TEST POINT
- GND TEST = POWER CORD GND & SIGNAL CABLE
METAL GND
- Internal Pressure TEST = POWER CORD GND & LIVE &
NEUTRAL
▪ LEAKAGE CURRENT: At 0.5 mArms
8. Audio
Measurement condition:
(1) RF input: Mono, 1 KHz sine wave signal, 100 % Modulation
(2) CVBS, Component: 1 KHz sine wave signal 0.5 Vrms
No. Item Min Typ Max Unit Remark
1.
Audio practical
max Output, L/R
(Distortion = 10
% max Output)
4.5 5 6 W
EQ Off
AVL Off
Clear Voice Off
5.5 6 Vrms
2. Speaker (6 Ω
Impedance) 5 6 W

- 15 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
9. USB S/W Download(Service only)
(1) Put the USB Stick to the USB socket.
(2) Go to General menu then enter to About This TV.
(3) Enter the USB EXPERT MODE.
(4) Updating is starting.
(5) Updating completed, the TV will restart automatically
(6) If your TV is turned on, check your updated version and
Tool option. (explain the Tool option, next stage)
* If downloading version is more new 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.
* After downloading, have to adjust Tool Option again.
(1) Push "IN-START" key in service remote control.
(2) Select "Tool Option 1" and push "OK" key.
(3) Punch in the number. (Each model has their number)

- 16 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
BLOCK DIAGRAM
1. MKT(A5LR)
1/1
IC101 A5LR
I2C_1Audio AMP
Digital Demod
IF (+/-)
Analog Demod
Tuner : I2C_2
Sub Micom
(R5F100GEAFB)
I2C 3
IR / KEY
IR
KEY I2C
HDMI MUX
LVDS
USB
SPDIF OUT
ETHERNET
USB1
USB2
OCP 1.5A
OCP 1.5A
S I D E
HDMI1
HDMI2
(ARC)
SIDE
R E A R
OPTIC
LAN
SYSTEM EEPROM
(256Kb)
51P
eMMC 5.0 (4GB) DDR3 1600 X 16 (512MB X 2EA)
I2C 1
X_TAL 24MHz
WIFI
SUB ASSY
USB_WIFI
CI slot
P_TS P_TS
Rear
Tuner
S
P
D
I
F
O
U
T
(
A
R
C
)
O
P
T
I
C

- 17 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
2. I2C
33Ω
+3.3V_NORMAL
3.3KΩ
TUNER
3.3KΩ
+3.3V_NORMAL
,&B6'$
,&B6&/
,&B6'$
,&B6&/
33Ω
+3.3V_NORMAL
3.3KΩ
IC5600 NTP7515(AMP)
,&B6'$
,&B6&/
100Ω
,&B6'$
,&B6&/ TUNER (Demod)
3.3KΩ
+3.3V_NORMAL
33Ω
IC101
A5LR
IC3000 R5F100GEAFB MICOM
IC100 NVRAM33Ω
33ΩIC6900
LNB
IR / KEY/EYE
100Ω
3.3KΩ
(<(B,&B6'$
(<(B,&B6&/
+3.5V_ST
0xA0 0x54
0xC0
0x52
0xCA
0x10

- 18 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
3. Tuner/CI
MTK
A5LR
F13 [DEMOD_TSCLK] F11 [DEMOD_TSSYNC] G13 [DEMOD_TSVAL]
LNB
IC6900
DT1803
10 [TONECTRL] 2 [LNB] 7 [SCL] 8 [SDA]
G18[OPCTRL11] F18[OPCTRL12]
D27 [ADCINP_DEMOD] D28 [ADCINN_DEMOD] G26[CVBS0P]
CI_MDI[0-7]
CI Slot
CI_MDO[0-7]
EB_DATA[0-7] CI_DATA[0-7] EB_ADDR[0-14] CI_ADDR[0-14]
/CI_CD1# /CI_CD2#
CI 5V
Power detect
PCM_5V_CTL +5V_CI_ON
CI_TS_SYNC
CI_TS_VAL
CI_TS_CLK
TPI_SOP
TPI_VAL TPI_CLK
CI_MDI[0-7]
E3-C6
TPI_DATA[0-7] CI_MDO[0-7]
/CI_CD1# /CI_CD2#
G1[SPI_CLK1]
CI_MCLKI CI_MIVAL CI_MISTRT
D12[CI_TSCLK] CI_CE1#
10K Ω
D11[SPI_DATA]
C10[SPI_CLE]
/CI_IOWR# /CI_IORD#
D2-E4
D1-D7
CI_ADDR[0-14] CI_DATA[0-7]
B2[CI_RST]
C9[PVR_TSDATA1]
B11[PVR_TSDATA0]
E12[CI_TSVAL]
F4[CI_TSSYNC]
F10[PVR_TSSYNC]
E10[PVR_TSCLK]
E11[CI_TSDATA0]
CI_MCLKO
CI_MOVAL
CI_MOSTRT
CI_RESET /CI_WAIT#
/CI_IREQ#
/CI_OE# /CI_WE# VCC
M22[OPCTRL6]
+3.3V_NORMAL
TDJM- G301D
[FE_DEMOD1_TS_ERROR_TU] 12
[FE_DEMOD1_1_TS_CLK] 14
[FE_DEMOD1_TS_SYNC] 15
[FE_DEMOD1_TS_VAL] 16
FE_DEMOD1_TS_DATA[0] 17 FE_DEMOD1_TS_DATA[1] 18 FE_DEMOD1_TS_DATA[2] 19 FE_DEMOD1_TS_DATA[3] 20 FE_DEMOD1_TS_DATA[4] 21 FE_DEMOD1_TS_DATA[5] 22 FE_DEMOD1_TS_DATA[6] 23 FE_DEMOD1_TS_DATA[7] 24
+1.2V_Demod_Core
[+3.3V_LNA_TU] 1
[LNB_TX] 29
[LNB_OUT] 31
[I2C_SCL4_TU] 27
[I2C_SDA4_TU] 30
+3.3V_NORMAL
[I2C_SCL2_TU] 4
[I2C_SDA2_TU] 5
[TU_SIF_TU] 8
[TU_CVBS_TU] 9
[IF_AGC_TU] 3
[/TU_RESET1_TU] 25
FILTER
FE_DEMOD1_TS_CLK FE_DEMOD1_TS_SYNC FE_DEMOD1_TS_VAL
FE_DEMOD1_TS_DATA [0-7]
LNB_TX
I2C_SCL4
I2C_SDA4 33Ω
33 Ω
LNB_OUT
IF_P
IF_N
TUNER_SIF
TU_CVBS
IF_AGC
ADCN_P_DEMOD
ADCN_N_DEMOD
I2C_SCL2
I2C_SDA2 33 Ω
/TU_RESET1
E15[OSCL1] D15[OSDA1]
E13 [DEMOD_RST]
G28[CVBS1P]
F15[IF_AGC]
CAM_CD1_N
TPI_DATA[0-7]
+3.3V_NORMAL
3.3KΩ
FE_DEMOD1_TS_ERROR
B4[CI_MCLKI]
H5[CI_MIVAL]
D4[CI_MISTRT]
[+3.3V_TUNER] 11
[3.3V_Demod_TU] 26
[1.2V_D_Demod_Core] 28
[IF_P] 6
[IF_N] 7
F12 [DEMOD_TSDATA0] J6 [GPIO42] J7 [GPIO43] G11 [GPIO44] H11 [GPIO45] H12 [GPIO46] G12 [GPIO47] E14 [RF_AGC]
C11[SPI_CLK]
CI_IOWR# /CI_IOWR#
CI_IORD# /CI_IORD#
/CI_WAIT#CI_WAIT#
D10[CI_INT] /CI_REG#
CI_REG# /CI_REG#
47 Ω
/CI_OE#CI_OE# /CI_WE#CI_WE# /CI_IREQ#
CI_RESET
TPO_DATA[0-7]
D3-C4
TPO_DATA[0-7]
+5V_CI_ON

- 19 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4. POWER
13.2V
PSU
AMP
3.4V_Normal
Switch 䟀⦐
(TR+FET)
TPS56428
(4A)
WIFI
TPS65282REGR
(4A)
USB1
USB2
BD86106EFJ
(6A) A5LR_Core
Panel Vcc Switch
䟀⦐(TR+FET) Panel
AZ1117EH_ADJ
(1A)
TJ2132
(2A)
EmmC
TUNER
D_Demod_Core
IR/KEY
Micom
A5LR
Tuner
AMP
Earphone
AMP
NVRAM
OPTIC
JACK
SCART OPAMP
EmmC
Scart Out
Buffer IC
DC DC Converter
LDO
3.4V
3.4V
1.2V
13V
OCP_AP2191WG
(1.6A)
1.8V
1.2V
TJ2132
(2A)
DDR
1.5V
0.6A
0.3A
1A
0.5A
2.4A 0.72A1.8A
0.63A
2.86A
0.3A
1.5A 1.5A
1.56A
Other Device

- 20 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
400
121 501 500
310
900
A2 A10
Set + Stand
120
200
530 540
521
800
LV1
570
EXPLODED VIEW
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.
IMPORTANT SAFETY NOTICE