LG 32LY560M User manual

Printed in KoreaP/NO : MFL68080421(1405-REV00)
CHASSIS : LA4AW
MODEL : 32LY560M 32LY560M-UA
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
PRODUCT SAFETY ................................................................................. 3
SPECIFICATION ....................................................................................... 4
ADJUSTMENT INSTRUCTION ................................................................ 8
TROUBLE SHOOTING............................................................................15
BLOCK DIAGRAM.................................................................................. 19
EXPLODED VIEW .................................................................................. 20
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 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 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 discharging
wrist strap device, which should be removed to prevent poten-
tial 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 solder
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 electri-
cally 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 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 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 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 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 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 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 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 spec sheet is applied LED TV with LA4AV,W chassis
2. Test condition
Each part is tested as below without special notice.
1) Temperature : 25 ºC ± 5 ºC(77 ± 9 ºF) , CST : 40 ºC±5 ºC
2) Relative Humidity: 65 % ± 10 %
3) Power Voltage
Market Input voltage Frequency Remark
USA 110~240V 50/60Hz Standard Voltage of each
product 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 5 minutes prior to
the adjustment
3. Test method
1) Performance: LGE TV test method followed
2) Demanded other specification
- Safety : UL, CSA, IEC specification
- EMC: FCC, ICES, IEC specification
4. General Specification
No Item Specication Result Remark
1. Receiving System ATSC / NTSC-M / 64 & 256 QAM
2. Available Channel 1) VHF : 02~13
2) UHF : 14~69
3) DTV : 02-69
4) CATV : 01~135
5) CADTV : 01~135
3. Input Voltage AC 100 ~ 240V 50/60Hz Mark : 110V, 60Hz (N.America)
4. Market NORTH AMERICA
5. Screen Size 22 inch Wide (1920 × 1080) FHD + 60Hz 22LY560M-UA
28 inch Wide (1366 × 768) HD + 60Hz 28LY560M-UA
32 inch Wide (1366 × 768) HD + 60Hz 32LY560M-UA
42 inch Wide (1920 × 1080) FHD +60Hz 42LY560M-UA
6. Aspect Ratio 16:9
7. Tuning System FS
8. Module LM215WF3-SLK1 FHD 22LY560M-UA
328041563 Kenmos BLU 28LY560M-UA
LC320DXE-FGA3 HD 32LY560M-UA
LC420DUE-FGA3 FHD 42LY560M-UA
9. Operating Environment 1) Temp : 0 ~ 40 deg
2) Humidity : ~ 80 %
10. Storage Environment 1) Temp : -20 ~ 60 deg
2) Humidity : ~ 85 %

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Only for training and service purposes
5. 7 External input support format
5.1. RGB Input (PC)
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed DDC
1. 640*350 31.468 70.09 25.17 EGA Х
2. 720*400 31.469 70.08 28.32 DOS O
3. 640*480 31.469 59.94 25.17 VESA(VGA) O
4. 800*600 37.879 60.31 40.00 VESA(SVGA) O
5. 1024*768 48.363 60.00 65.00 VESA(XGA) O
6. 1280*768 47.776 59.870 79.5 CVT(WXGA) Х
7. 1360*768 47.712 60.015 85.50 VESA (WXGA) Х
8. 1600*1200 75.00 60.00 162.0 VESA (UXGA) X
9. 1920*1080 67.50 60.00 148.5 HDTV 1080P O
5.2. HDMI Input 1 (PC/DTV)
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed DDC
HDMI-PC (Except HDMI3) DDC
1. 640*350 31.468 70.09 25.17 EGA X
2. 720*400 31.469 70.08 28.32 DOS O
3. 640*480 31.469 59.94 25.17 VESA(VGA) O
4. 800*600 37.879 60.31 40.00 VESA(SVGA) O
5. 1024*768 48.363 60.00 60.00 VESA(XGA) O
6. 1152*864 54.348 60.053 VESA X
7. 1280*1024 63.981 60.020 108.0 VESA (SXGA) O
8. 1360*768 47.712 60.015 85.50 VESA (WXGA) O
9. 1920*1080 67.50 60.00 148.5 HDTV 1080P O
HDMI-DTV
1 720*480 31.500 60.000 27.027 SDTV 480P
2 720*480 31.470 59.940 27.000 SDTV 480P
3 1280*720 45.000 60.000 74.250 HDTV 720P
4 1280*720 44.960 59.940 74.176 HDTV 720P
5 1920*1080 33.750 60.000 74.250 HDTV 1080I
6 1920*1080 33.720 59.940 74.176 HDTV 1080I
7 1920*1080 67.500 60.000 148.500 HDTV 1080P
8 1920*1080 67.4320 59.940 148.352 HDTV 1080P
9 1920*1080 27.000 24.000 74.250 HDTV 1080P
10 1920*1080 26.970 23.976 74.176 HDTV 1080P
11 1920*1080 33.750 30.000 74.250 HDTV 1080P
12 1920*1080 33.710 29.970 74.176 HDTV 1080P
5.3. Video
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed
1 710*484 15.73 60 NTSC-M

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Only for training and service purposes
ADJUSTMENT INSTRUCTION
1. Application
This spec. sheet applies to LA4AV,W Chassis applied LED TV
all models manufactured in TV factory
2. Specification
(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 ±5 ºC of temperature and 65±10% of relative humidity if
there is no specific designation
(4) The input voltage of the receiver must keep 100~240V,
50/60Hz
(5) At first Worker must turn on the SET by using Power Only
key.
(6) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
15 ºC
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. Adjustment items
3.1. Main PCBA Adjustments
(1) Adjust RGB (ADC)
(2) EDID/DDC download
■ Above adjustment items can be also performed in Final
Assembly if needed.
Both Board-level and Final assembly adjustment items can
be check using In-Start Menu (1.Adjust Check).
Component 1080p and RGB-PC Adjust will be calculated by
480i adjust value
3.2. Final assembly adjustment
▪White Balance adjustment
▪RS-232C functionality check
▪Factory Option setting per destination
▪Ship-out mode setting (In-Stop)
3.3. Appendix
▪ Ship-out mode
▪ Service Option Default
▪ USB Download(S/W Update, Option, Service only)
▪ ISP Download (Optional)
4. Automatic Adjustment
4.1. ADC Adjustment
4.1.1. Overview
▪ ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate RGB
deviationI
4.1.2. Equipment & Condition
(1) Protocol: RS-232C
(2) Inner Pattern
- Resolution : 1080p (Inner Pattern)
- Resolution : 1024*768 RGB (Inner Pattern)
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level : 0.7±0.1 Vp-p
4.1.3. Adjustment
4.1.3.1. Adjustment method
- Connect to Jig by using RS-232(USB)
* Manual adj (If needed in Final Assembly)
- Required equipment : Adjustment R/C
- Enter Service Mode by pushing “ADJ” key,
- Start ‘OTP’ ADC Type by pushing ‘►’ key at [7. ADC
Calibration]
4.1.3.2. Adj. protocol (only Internal patten)
Protocol Command Set ACK
Enter adj. mode aa 00 00 a 00 OK00x
Source change xb 00 60 b 00 OK60x (Adjust 1024*768 RGB)
Begin adj. ad 00 10
Return adj. result OKx (Case of Success)
NGx (Case of Fail)
Read adj. data (main)
ad 00 20
(sub )
ad 00 21
(main)
000000000000000000000000007c007b006dx
(Sub)
000000070000000000000000007c00830077x
Conrm adj. ad 00 99 NG 03 00x (Fail)
NG 03 01x (Fail)
NG 03 02x (Fail)
OK 03 03x (Success)
End adj. aa 00 90 a 00 OK90x
Ref.) ADC Adj. RS232C Protocol_Ver1.0
4.1.3.3. Adj. order
▪aa 00 00 [Enter ADC adj. mode]
▪xb 00 60 [Change input source to RGB(1024*768)]
▪ad 00 10 [Adjust 1024*768 RGB]
▪ad 00 90 End adj.

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5. Manual Adjustment
5.1. ADC Adjustment
5.1.1. Overview
ADC adjustment is needed to find the optimum black level and
gain in Analog-to-Digital device and to compensate RGB
deviation.
5.1.2. Equipment & Condition
1) Adjust Remote controller
2) 801GF(802B, 802F, 802R) or MSPG925FA Pattern
Generator
- Resolution: 480i Comp1 (MSPG-925FA: model-209,
pattern-65)
- Resolution : 1024*768 RGB (Inner Pattern)
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level: 0.7±0.1 Vp-p
- Image
- or Inner pattern.
3) Must use standard cable
5.1.3. Adjust method
5.1.3.1. ADC RGB
1) Press the In-start Key on the ADJ remote after at least 1
min of signal reception. Then, select ADC Calibration. And
Press OK Button on the menu “Start”. The adjustment will
start automatically.
2) If ADC RGB is successful, “ADC RGB Success” is
displayed and ADC RGB is completed. If ADC calibration is
failure, “ADC RGB Fail” is displayed.
3) If ADC calibration is failure, after rechecking ADC pattern or
condition, retry calibration
5.2. EDID Download (EDID PCM)
5.2.1. Overview
▪ It is a VESA regulation. A PC or a MNT will display an
optimal resolution through information sharing without any
necessity of user input. It is a realization of “Plug and Play”.
5.2.2. Equipment
(1) Since EDID data is embedded, EDID download JIG, HDMI
cable is not need.
(2) Adjust remocon
5.2.3. Download method
(1) Press Adj. key on the Adj. R/C.
(2) Select EDID D/L menu.
(3) By pressing Enter key, EDID download will begin
(4) If Download is successful, OK is display, but If Download is
failure, NG is displayed.
(5) If Download is failure, Re-try downloads.
※Caution) When EDID Download, must remove RGB/HDMI
Cable
5.2.3.1. HD Model - 28/32LY560M-UA
■ HDMI1 HD 8BIT (C/S : 6F08)
EDID Block 0, Bytes 0-127 [00H-7FH]
EDID Block 1, Bytes 128-255 [80H-FFH]
■ HDMI2 HD 8BIT (C/S : 6FF8)
EDID Block 0, Bytes 0-127 [00H-7FH]
EDID Block 1, Bytes 128-255 [80H-FFH]

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Only for training and service purposes
■ RGB-HD 8BIT (C/S : 88)
EDID Block 0, Bytes 0-127 [00H-7FH]
5.2.3.2. FHD Model - 22/42LY560M-UA
■ HDMI1 FHD 8BIT (C/S : E708)
EDID Block 0, Bytes 0-127 [00H-7FH]
EDID Block 1, Bytes 128-255 [80H-FFH]
■ HDMI2 FHD 8BIT (C/S : E7F8)
EDID Block 0, Bytes 0-127 [00H-7FH]
EDID Block 1, Bytes 128-255 [80H-FFH]
■ RGB-FHD 8BIT (C/S : 00)
EDID Block 0, Bytes 0-127 [00H-7FH]
6. Final Assembly Adjustment
6.1. White Balance Adjustment
6.1.1. Overview
6.1.1.1. 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.
■ Case : Cool Mode
- To adjust the white balance without the saturation, G gain
should be adjust at least 172 and change the others (R,B
Gain)
* When R or B gain is over 255, G gain can be adjust
below 172)
■ Case : Medium / Warm Mode
- To adjust the white balance without the saturation, Fix the
one of R/G/B gain to 192 (default data) and decrease the
others.
(3) Adj. condition: normal temperature
- Surrounding Temperature: 25±5 ºC
- Warm-up time: About 5 Min
- Surrounding Humidity: 20% ~ 80%
- Before White balance adjustment, Keep power on status,
don’t power off
6.1.1.2. 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 10cm and perpendicular of the module surface
(80°~ 100°)
(3) Aging time
- After Aging Start, Keep the Power ON status during 5
Minutes.
- In case of LCD, Back-light on should be checked using no
signal or Full-white pattern.
6.1.2. Equipment
(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:
CH14)
(2) Adj. Computer(During auto adj., RS-232C protocol is
needed)
(3) Adjust Remocon
(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-1000
6.1.3. Equipment connection MAP
Color Analyzer
Computer
Pattern Generator
※
Signal Source
Probe
RS-232C
RS-232C
RS-232C
※If TV internal pattern is used, not needed

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Only for training and service purposes
6.1.4. Adjustment Command (Protocol)
(1) RS-232C Command used during auto-adj
RS-232C COMMAND Explanation
CMD DATA ID
Wb 00 00 Begin White Balance adj.
Wb 00 ff End White Balance adj.
(internal pattern disappears )
(2) Adjustment Map
Applied Model : 32/42LY560M-UA
Adj. item
Command
(lower case ASCII)
Data Range
(Hex.) Default
(Decimal)
CMD1 CMD2 MIN MAX
Cool R Gain j g 00 C0 172
G Gain j h 00 C0 172
B Gain j i 00 C0 192
R Cut 64
G Cut 64
B Cut 64
Medium R Gain j a 00 C0 192
G Gain j b 00 C0 192
B Gain j c 00 C0 192
R Cut 64
G Cut 64
B Cut 64
Warm R Gain j d 00 C0 192
G Gain j e 00 C0 192
B Gain j f 00 C0 172
R Cut 64
G Cut 64
B Cut 64
Applied Model : 22LY560M-UA
Adj. item
Command
(lower case ASCII)
Data Range
(Hex.) Default
(Decimal)
CMD1 CMD2 MIN MAX
Cool R Gain j g 00 C0 136
G Gain j h 00 C0 137
B Gain j i 00 C0 192
R Cut 64
G Cut 64
B Cut 64
Medium R Gain j a 00 C0 169
G Gain j b 00 C0 174
B Gain j c 00 C0 233
R Cut 64
G Cut 64
B Cut 64
Warm R Gain j d 00 C0 181
G Gain j e 00 C0 180
B Gain j f 00 C0 192
R Cut 64
G Cut 64
B Cut 64
Applied Model : 28LY560M-UA
Adj. item
Command
(lower case ASCII)
Data Range
(Hex.) Default
(Decimal)
CMD1 CMD2 MIN MAX
Cool R Gain j g 00 C0 148
G Gain j h 00 C0 146
B Gain j i 00 C0 192
R Cut 64
G Cut 64
B Cut 64
Medium R Gain j a 00 C0 185
G Gain j b 00 C0 178
B Gain j c 00 C0 192
R Cut 64
G Cut 64
B Cut 64
Warm R Gain j d 00 C0 192
G Gain j e 00 C0 160
B Gain j f 00 C0 123
R Cut 64
G Cut 64
B Cut 64

- 12 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
6.1.5. Adjustment method
6.1.5.1. Auto WB calibration
1) Set TV in adj. mode using POWER ONLY (P-ONLY) key
2) Zero calibrate probe then place it on the center of the
Display
3) Connect Cable(RS-232C)
4) Select mode in adj. Program and begin adj.
5) When adj. is completed (OK Sing), check adj. status of 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.
6.1.5.2. Manual adj. 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 10cm of the surface..
(3) Press ADJ key -> EZ adjust using adj. R/C -> 6. White-
Balance then press the cursor to the right (KEY►).
(When KEY(►) is pressed 204 Gray(80IRE) 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) Adj. is performed in COOL, MEDIUM, WARM 3 modes of
color temperature.
▪ If internal pattern is not available, use RF input. In EZ Adj.
menu 6.White Balance, you can select one of 2 Test-pattern:
ON, OFF. Default is inner(ON). By selecting OFF, you can
adjust using RF signal in 204 Gray pattern.
▪ 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 10cm and perpendicular of the module surface
(80°~ 100°)
3) Aging time
- After Aging Start, Keep the Power ON status during 5
Minutes.
- In case of LCD, Back-light on should be checked using no
signal or Full-white pattern.
6.1.6. Reference
(White Balance Adj. coordinate and color
temperature)
▪ Luminance: 204 Gray, 80IRE
▪ Standard color coordinate and temperature using CA-210(CH-14)
Mode Coordinate Temp △uv
x y
Cool 0.271±0.002 0.270±0.002 13000K -0.003
Medium 0.285±0.002 0.293±0.002 9300K 0.0000
Warm 0.313±0.002 0.329±0.002 6500K 0.0000
▪ Standard color coordinate and temperature using CA-210(CH 14)
– by aging time
6.1.6. White balance adjustment for 22/28inch (Do
not adjust white balance)
* RGB Gains are fixed data for each model.
Insert RS-232C Jack which is connected with PC for White
Balance or equivalent device.
=> Total Assembly line should be check whether the color
coordinate(x,y) data refer to below table were meet or not.
Color coordinate is differ from panel’s characteristics of
color temperature. Please check panel characteristics
about color temperature.
- Cool Panel (28LY560M)
Color
Temperature
Cool 13,000 K X=0.276
(±0.04)
Y=0.275
(±0.04)
<Test Signal>
Inner pattern
(204gray,80IRE)
Medium 9,300 K X=0.290
(±0.04)
Y=0.298
(±0.04)
Warm 6,500 K X=0.318
(±0.04)
Y=0.334
(±0.04)
Luminance Cool Min : 80 cd/m2Typ : 110 <Test Signal>
Inner pattern
(204gray,80IRE)
Medium Min : 80 cd/m2Typ : 110
Warm Min : 70 cd/m2Typ : 110
- Warm Panel (22LY560M)
Color
Temperature
Cool 9,300k K X=0.290
(±0.04)
Y=0.298
(±0.04)
<Test Signal>
Inner pattern
(204gray,80IRE)
Medium 8,000k K X=0.300
(±0.04)
Y=0.310
(±0.04)
Warm 6,500k K X=0.318
(±0.04)
Y=0.334
(±0.04)
Luminance Cool Min : 80 cd/m2Typ : 110 <Test Signal>
Inner pattern
(204gray,80IRE)
Medium Min : 80 cd/m2Typ : 110
Warm Min : 80 cd/m2Typ : 110
*Note : x,y coordinates are drifted about 0.005 after 30 mins
heat-run. So checking color coordinate within 5-min at total
assembly line, consider x,y coordinates might be up to 0.005
than x,y target of each color temperature.
*Note : Manual W/B process using service remote control.
1) After enter Service Mode by pushing “ADJ” key,
2) Enter “White Balance” by pushing “►” key at “9. White
Balance”.

- 13 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
6.3. Option selection per country
6.3.1. Overview
(1) Tool option selection is only done for models in Non-USA
North America due to rating
(2) Applied model : LA4AV/W Chassis is applied in USA
6.3.2. Method
(1) Press ADJ key on the Adj. R/C, then select Country Group
Menu.
(2) Depending on destination, select KR or US, then on the
lower Country option, select US, CA, MX. Selection is done
using +, - KEY
7. GND and HI-POT Test
7.1. GND & HI-POT auto-check preparation
(1) Check the POWER CABLE and SIGNAL CABE insertion
condition
7.2. GND & HI-POT auto-check
(1) Pallet moves in the station. (POWER CORD / AV CORD is
tightly inserted)
(2) Connect the AV JACK Tester.
(3) Controller (GWS103-4) on.
(4) GND Test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, execute next process (Hi-pot test).
(Remove A/V CORD from A/V JACK BOX)
(5) HI-POT test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, GOOD Lamp on and move to next
process automatically
7.3. Checkpoint
(1) Test voltage
- GND: 1.5KV/min at 100mA
- SIGNAL: 3KV/min at 100mA
(2) TEST time: 1 second
(3) TEST POINT
- GND Test = POWER CORD GND and SIGNAL CABLE
GND.
- Hi-pot Test = POWER CORD GND and LIVE & NEUTRAL.
(4) LEAKAGE CURRENT: At 0.5mArms
8. AUDIO output check
8.1. Audio input condition
(1) RF input: Mono, 1KHz sine wave signal, 100% Modulation
(2) CVBS, Component: 1KHz sine wave signal (0.4Vrms)
(3) RGB PC: 1KHz sine wave signal (0.7Vrms)
8.2. Specification
No Item Min Typ Max Unit Remark
1 Audio practi-
cal max
Output, L/R
(Distor-
tion=10%
max Output)
9.0 10.0 12 W Measure-
ment condi-
tion
EQ Off
AVL Off
Clear Voice
Off
DRC opera-
tion under
12W
(42LY series)
8.5 8.9 9.8 Vrms
4.5 5 6 W 22/28LY
Series
6 6.4 6.7 Vrms
2 Speaker
(8Ω Imped-
ance)
10.0 14.0 W (1) Measure-
ment
condition
- EQ/AVL/
Clear
Voice:
Off
32/42LY
Series
5 7 W 22/28LY
Series
▪Measurement condition:
(1) RF input: Mono, 1KHz sine wave signal, 100% Modulation
(2) CVBS, Component: 1KHz sine wave signal 0.4Vrms
(3) RGB PC: 1KHz sine wave signal 0.7Vrms
9. USB S/W Download
(optional, Service only)
(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 lower
than that of TV set, it didn’t work. Otherwise USB data is
automatically detected.
(3) Show the message “Copying files from memory”
(4) Updating is staring.

- 14 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
(5) Updating Completed, The TV will restart automatically
(6) If your TV is turned on, check your updated version and
Tool option.
* If downloading version is more high 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, TOOL OPTION setting is needed 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.)
10. External Speaker Out
(1) Connect external speaker to speaker out port with phone
jack on TV rear bracket
(2) Check the Max. speaker output is 1W or not. Sine wave
with 1KHz will be displayed
(3) Check Both of the signal in speaker.
(only Power -> Fived 1W Default)
-> Check the input signal(1KHZ, Sine wave) and the
waveform of output by utilizing oscilloscope.
11. Pro:Idiom
1) Connect RF cable.
2) Press the Exit key for Encryption channel check when
Power Only
3) Check if the channel is automatically switched into 96-1
(Encryption channel).
- Check the Video is fine or not.
- Check the Audio is fine or not
12. LAN Test method
(1) Enter PTC INSTALLER MENU
(2) How to enter IP Set up window : press 119 -> press menu
key -> press 253 -> press menu key
(3) In IP Environment, there are three menu for LAN TEST
Measuring point
Recommended Input Signal
: RF, 1kHz, Sine wave
Waveform of Oscilloscope

- 15 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
TROUBLE SHOOTING
1. Power-up boot check
Check stand-by Voltage.
P401 3, 5pin : +3.5V_ST Check 18pin Power connector Main B/D 3.5V Line
Short Check
Check X101 clock
24 MHz Replace X101
Check P401 PWR_ON.
1pin : 3.3V
Replace Mstar(IC101) or Main board
Check Multi Voltage
P401 9, 10pin : 24V
/ 13, 14, 15pin:12V
Replace Power Board
Check DRV ON Control
P401 2 pin : High
Check Power Board
Check IC403/404/Q406
Output Voltage
IC403 : 1.1V
IC404 : 1.5V
Q406 : 3.3V
Replace IC403, IC404, Q406
Re-download software.
Check stand-by Voltage
L400, L401 : +3.5V Replace L400,L401
Check LVDS Power Voltage
Q405 : 12V Replace Q405
Check Mstar LVDS Output Replace Mstar(IC101) or Main Board
Change Module
ok
ok
ok
ok
ok
ok
ok
ok
okNo
No
ok
Replace Power board.
ok
No
No
No
No
No
No
No
No

- 16 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
2. Digital/Analog TV Video
3. AV Video
Check RF Cable & Signal
Check Tuner 3.3V Power
L1600 Replace L1600
Check IF_P/N Signal
TU1601, 6/7 Pin
Check Mstar LVDS Output Replace Mstar(IC101) or Main Board.
ok
ok
ok
No
No
No
Bad Tuner. Replace Tuner.
Check input signal format.
Is it supported?
Check AV Cable for damage
for damage or open conductor
Check JK1702, CVBS Signal Line
R1722
ok
ok
ok
No Replace Jack
ok
Check CVBS_DET Signal
R1713 Replace R1713
No
Check Mstar LVDS Output Replace Mstar(IC101) or Main Board.
No

- 17 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
4. RGB Video
5. HDMI Video
Check input signal format.
Is it supported?
Check RGB Cable
for damage or open conductor.
Check JK705
R/G/B signal Line
ok
ok
ok
No Replace Jack
Check RGB_DET Signal Replace R732
No
Check Mstar LVDS Output Replace Mstar(IC101) or Main Board.
ok
No
Check input signal format.
Is it supported?
Check HDMI Cable conductors
for damage or open conductor.
Check EDID Downlaod
ok
ok
ok
No Replace the defective IC or re-download EDID data
Check HDMI Signal Check other set
If no problem, check signal line
ok
No
Check Mstar LVDS Output Replace Mstar(IC101) or Main Board.
ok
No
Replace Main Board
No
Check HDMI_DET (HPD) No Replace HDMI1 R802, R805, Q800
HDMI2 R812, R813, R814
Check HDMI I2C Signal
ok
No Replace D800. D801
Check JK,800, JK801 No Replace Jack
ok

- 18 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
6. All Source Audio
7. Digital/Analog TV Audio
Check the TV Speaker Menu
(Menu -> Audio -> TV Speaker)
On
ok
ok
Replace C5630,C5632,C5633,C5631,C5634,C5635
Check Connector & P5600 Replace connector
if found to be damaged.
ok
No
Check speaker resistance
and connector damage. Replace speaker.
ok
No
Off Toggle the Menu
Check AMP IC(IC5600) Power
24V, 3.3V
No Replace Amp IC(IC5600)
Check Output Signal P5600
1, 2, 3, 4 pin.
No
Check Mstar AUDIO_MASTER_CLK
R123
No Replace Mstar(IC101) or Main Board.
ok
Check AMP I2C Line
R111, R112
No Check signal line. Or replace Mstar(IC101)
Replace Audio AMP IC(IC501)
Check signal line,
L5603,L5604, L5605,L5606
ok
No
Check RF Cable & Signal
Follow procedure
‘7. All source audio’
trouble shooting guide.
ok
Check Tuner 3.3V Power
L1600 Replace L1600
Check IF_P/N Signal
TU1601 6,7 Pin
ok
ok
No
No Bad Tuner. Replace Tuner.

- 19 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
BLOCK DIAGRAM
H5TQ2G63DFR-PBC
2GBIT 800MHz
(1600) IC1201
H27U2G8F2CTR
2GBIT IC102
Digital AMP
TAS5733
IC500
I2S A_Data[0:15], Addr.[ ], ctrl, DQS, DM … PCM_A [0 … 7]
IF N/P
SIF TU_CVBS
X-tal
Reset / IF_AGC …
SDA/SCL_3.3V
Reset Switch
CS ,RE,WE……
RX/TX
Micom
(MSP430F5419IPZR)
IC5002
24MHz
JACK PACK
at REAR
SCL, SDA_3.3V
RF
IC101
LGE2131(M1A_128M)
LAN
S/W Reset
EXT_OUT
I2C(SCL/SDA)
S_FLASH (8M bit)
MX25L8006EM2I-12G
IC610
AUDIO AMP
TPA3124D2PWPR
IC1800
JK1800
JK5000
Pro:Idom
LGDT1001
IC1209
TS_CLK,VALID,SYNC,0~7
PM_TS_CLK,VALID,SYNC,0~7
TDJH-
H101F
M.P.I
HDMI 1
HDMI 2
RGB PC
AV/PC Audio
USB
RGB/H/V
CVBS, L/R
SIDE_USB_DP/DM/ +5V
JACK PACK
at Side
SPDIF
Pillow speaker

- 20 - LGE Internal Use OnlyCopyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
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 X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
200 LV1
410
120
310 121
820 530
540 521
400