LG 32LB7D User manual

R
LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LT73B
MODEL : 32LB7D 32LB7D-TB
website:http://biz.LGservice.com
Internal Use Only

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CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ..........................................................................3
SPECIFICATION ........................................................................................6
ADJUSTMENT INSTRUCTION .................................................................8
TROUBLE SHOOTING ............................................................................12
BLOCK DIAGRAM...................................................................................19
EXPLODED VIEW .................................................................................. 24
EXPLODED VIEW PARTS LIST..............................................................25
REPLACEMENT PARTS LIST ............................................................... 26
SVC. SHEET ...............................................................................................
Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only

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Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
SAFETY PRECAUTIONS
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the
Schematic Diagram and Replacement Parts List.
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 1W), keep the resistor 10mm 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 1MΩand 5.2MΩ.
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 1.5K/10watt resistor in parallel with a 0.15uF 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
0.5mA.
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
1.5 Kohm/10W
To Instrument’s
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter
IMPORTANT SAFETY NOTICE
0.15uF

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Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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 conflict 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
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
explosion hazard.
2. Test high voltage only by measuring it with an appropriate high
voltage meter or other voltage measuring device (DVM,
FETVOM, etc) equipped with a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Do not spray chemicals on or near this receiver or any of its
assemblies.
4. Unless specified 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 flammable mixture.
Unless specified 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 fixtures specified in this
service manual.
CAUTION: Do not connect the test fixture ground strap to any
heat sink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged easily
by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES
devices are integrated circuits and some field-effect transistors and
semiconductor "chip" components. The following techniques
should be used to help reduce the incidence of component
damage caused by static by static electricity.
1. Immediately before handling any semiconductor component or
semiconductor-equipped assembly, drain off any electrostatic
charge on your body by touching a known earth ground.
Alternatively, obtain and wear a commercially available
discharging wrist strap device, which should be removed to
prevent potential shock reasons prior to applying power to the
unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES
devices.
4. Use only an anti-static type solder removal device. Some solder
removal devices not classified as "anti-static" can generate
electrical charges sufficient to damage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective
package until immediately before you are ready to install it.
(Most replacement ES devices are packaged with leads
electrically shorted together by conductive foam, aluminum foil
or comparable conductive material).
7. Immediately before removing the protective material from the
leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be
installed.
CAUTION: Be sure no power is applied to the chassis or circuit,
and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged
replacement ES devices. (Otherwise harmless motion such as
the brushing together of your clothes fabric or the lifting of your
foot from a carpeted floor can generate static electricity
sufficient 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 1.25cm) 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 flows onto and around both the
component lead and the foil.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
d. Closely inspect the solder area and remove any excess or
splashed solder with a small wire-bristle brush.
SERVICING PRECAUTIONS

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Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent flat against the
circuit foil. When holes are the slotted type, the following technique
should be used to remove and replace the IC. When working with
boards using the familiar round hole, use the standard technique
as outlined in paragraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by gently
prying up on the lead with the soldering iron tip as the solder
melts.
2. Draw away the melted solder with an anti-static suction-type
solder removal device (or with solder braid) before removing the
IC.
Replacement
1. Carefully insert the replacement IC in the circuit board.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
"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
possible to diode body.
2. Bend the two remaining leads perpendicular y to the circuit
board.
3. Observing diode polarity, wrap each lead of the new diode
around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of
the two "original" leads. If they are not shiny, reheat them and if
necessary, apply additional solder.
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
connections).
1. Carefully remove the damaged copper pattern with a sharp
knife. (Remove only as much copper as absolutely necessary).
2. carefully scratch away the solder resist and acrylic coating (if
used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and
carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away copper
pattern and let it overlap the previously scraped end of the good
copper pattern. Solder the overlapped area and clip off any
excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper pattern
at connections other than IC Pins. This technique involves the
installation of a jumper wire on the component side of the circuit
board.
1. Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to ensure that a hazardous
condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the pattern
break and locate the nearest component that is directly
connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of the
nearest component on one side of the pattern break to the lead
of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so the
it does not touch components or sharp edges.

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Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. Application range
This spec sheet is applied to the 32" LCD TV used LT73B
chassis.
2. Secification
Each part is tested as below without special appointment.
(1) Temperature : 25 ± 5°C(77 ± 9°F), CST : 40 ± 5°C
(2) Relative Humidity : 65% ± 10%
(3) Power Voltage : Standard input voltage (100-240V~,
50/60Hz)
*Standard Voltage of each products is marked by models.
(4) Specification and performance of each parts are followed
each drawing and specification by part number in
accordance with BOM.
(5) The receiver must be operated for about 20 minutes prior
to the adjustment.
3. Test method
(1) Performance : LGE TV test method followed
(2) Demanded other specification
Safety : CE, IEC Specification
EMC : CE, IEC
SPECIFICATION
4. General Specification(LCD Module)
Remark
32, 37, 47 inch
42 inch
Typical
(H) x (V) x (D)
Specification
32" TFT WXGA LCD
H : 45 ~ 50Khz, V : 47 ~ 63Hz
H : 44.65 ~ 50.35Khz, V : 47 ~ 63Hz
32 inch 87.48W(Total) 3.48W(Logic), 84W(Lamp)
Type Size 32" 760.0 x 450.0 x 42.8
Pixel Pitch 32" 170.25 x 510.75 x RGB
Pixel Format 1366 horiz, By 768 vert Pixels RGB strip
arrangement
Coating Hard coating(3H), Anti-glare treatment of the front
polarizer
Back Light 32" 18 EEFL
Item
Panel
Frequency range
Power Consumption
LCD Module
Unit
mm
um
5. Component Video Input (Y, PB, PR)
Resolution
720 x 480
720 x 480
720 x 480
720 x 576
720 x 576
1280 x 720
1280 x 720
1920 x 1080
1920 x 1080
1920 x 1080
H-freq(kHz)
15.73
15.63
31.47
15.625
31.25
45.00
44.96
31.25
33.75
33.72
V-freq(kHz)
60.00
59.94
59.94
50.00
50.00
50.00
59.94
50.00
60.00
59.94
Remark
SDTV, DVD 480i
SDTV, DVD 480i
480p
SDTV, DVD 625 Line
HDTV 576p
HDTV 720p
HDTV 720p
HDTV 1080i
HDTV 1080i
HDTV 1080i

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6. RGB Input (Analog PC)
Resolution
720 x 400
640 x 480
800 x 600
832 x 624
1024 x 768
1280 x 768
1360 x 768
1366 x 768
1920 x 1080
H-freq(kHz)
31.468
31.469
37.684
37.879
46.875
49.725
48.363
56.476
60.123
47.78
47.72
47.56
66.647
V-freq(kHz)
70.08
59.94
75.00
60.31
75.00
74.55
60.00
70.00
75.029
59.87
59.8
59.6
59.988
Pixel clock(MHz)
28.32
25.17
31.50
40.00
49.50
57.283
65.00
75.00
78.75
80.125
84.625
84.625
138.625
Proposed
VESA
VESA
VESA(XGA)
VESA(WXGA)
VESA(WXGA)
Supported
WUXGA
Resolution
640 x 480
640 x 480
720 x 480
720 x 480
720 x 576
1280 x 720
1280 x 720
1280 x 720
1920 x 1080
1920 x 1080
1920 x 1080
1920 x 1080
1920 x 1080
1920 x 1080
1920 x 1080
H-freq(kHz)
31.469
31.469
31.47
31.50
31.25
37.50
44.96
45.00
28.125
33.72
33.75
27.000
56.25
67.433
67.50
V-freq(kHz)
59.94
60
59.94
60
50.00
50.00
59.94
60
50.00
59.94
60
24.000
50.00
59.94
60
Pixel clock(MHz)
25.175
25.20
27.00
27.027
27.000
74.176
74.176
74.250
74.250
74.176
74.250
74.250
148.500
148.352
148.500
Remark
SDTV 480p 60Hz
SDTV 480p 60Hz
SDTV 480p 60Hz
SDTV 480p 60Hz
SDTV 576p 50Hz
HDTV 720p 50Hz
HDTV 720p 60Hz
HDTV 720p 60Hz
HDTV 1080i 50Hz
HDTV 1080i 60Hz
HDTV 1080i 60Hz
HDTV 1080P 24Hz
HDTV 1080P 50Hz
HDTV 1080P 60Hz
HDTV 1080P 60Hz
Proposed
HDCP
HDCP
HDCP
HDCP
HDCP
HDCP
HDCP
HDCP
HDCP
HDCP
7. HDMI input (DTV)
Resolution
720 x 400
640 x 480
800 x 600
832 x 624
1024 x 768
1280 x 768
1360 x 768
1366 x 768
1920 x 1080
V-freq(kHz)
70.08
59.94
75.00
60.31
75.00
74.55
60.00
70.00
75.029
59.87
59.8
59.6
59.988
Pixel clock(MHz)
28.32
25.17
31.50
40.00
49.50
57.283
65.00
75.00
78.75
80.125
84.625
84.625
138.625
Proposed
VESA
VESA
VESA(XGA)
VESA(WXGA)
VESA(WXGA)
Supported
WUXGA
H-freq(kHz)
31.468
31.469
37.684
37.879
46.875
49.725
48.363
56.476
60.123
47.78
47.72
47.56
66.647
8. HDMI input (PC)

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Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
ADJUSTMENT INSTRUCTION
1. Application Range
This spec sheet is applied all of the LD73A chassis
manufactured at LG TV Plant all over the world.
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 sequence.
3) The adjustment must be performed at 25±5°C temperature
and 65±10% relative humidity if there is no specificed
designation.
4) The input voltage of the receiver must kept 100~220V,
50/60Hz.
5) Before adjustment, execute Heat-Run for 30 minutes at RF
no signal.
3. Method of Download for Cortez &
STi (When Rework) Connect
Computer & TV Set with RS 232C
Download Cable
3.1. Cortez Download
* Press "TILT" Key -> Check TV OSD "GProbe Mode" -> Run
"GProbe" Program As below picture
3.2. STi Download
* Press "TILT" Key -> Check TV OSD "STi5100 Mode" -> Run
"LG Term" Program As below picture
4. ADC Calibration
* Caution: Using ‘power on’ button of the control
R/C , power on TV.
-.Baud rate :115200 bps
-.RS232 Host : PC
-.echo : none
< ADC Calibration >
* Caution : - System control RS-232 Host should be
"PC" for adjustment.
- Before AV ADC Calibration, execute the
"Panel size selection" (only LCD model)
4.1. Adjustment of AV
Mandatory point : All models are adjusted PAL in AV mode
* Required Equipments
1) Remote controller for adjustment.
2) MSPG-925FS Pattern Generator (Which has Video Signal:
7 Color Bar Pattern shown in Fig. 1).
-> Model : 202 / Pattern : 65 PAL-BGDHI (composite signal)
4.1.1. Method of Auto AV Color Balance(PAL_BGDHI).
1) Input the Video Signal : 7 Color Bar signal into AV3.
2) Set the PSM to Dynamic mode in the Picture menu.
[Fig.1]
3) Press IN-START key on R/C for adjustment.
4) Press the (Vol.+) key to operate the set, then it becomes
automatically.
5) After downloading complete, the ‘OK’ word appears.
6) Auto-RGB OK means the adjustment is completed.
ADC AV Component RGB-PC
MSPG925FS PAL Model:215 (720P) Model: 3
INPUT SELECT AV1 Pattern:65 (1024*768
Model: 202(PAL-BGDHI) * 720P/50Hz 60Hz)
Pattern: 65 7 Color Bar Pattern:65
*PAL 7 Color Bar

- 9 -
Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4.2. Adjustment of Component
* Required Equipments
1) Remote controller for adjustment.
2) MSPG-925FS Pattern Generator. (Which has 720p/50Hz
YPbPr output Pattern shown in Fig. 2)
-> Model: 215 / Pattern: 65
4.2.1. Method of Auto Component Color Balance
1) Input the Component 720p/50Hz 7 Color Bar(MSPG-925FS
model:215, pattern:65) signal into Component.
2) Set the PSM to Dynamic mode in the Picture menu.
[Fig.2]
3) Press the IN-START key on R/C for adjustment.
4) Press the (Vol.+) key to operate the set , then it becomes
automatically.
5) After downloading complete, the ‘OK’ word appears.
6) Auto-RGB OK means the adjustment is completed.
4.3. Adjustment of RGB
* Required Equipments
1) Remote controller for adjustment.
2) MSPG-925FS Pattern Generator.(Which has XGA
[1024*768] 60Hz 1/2 black & white pattern shown in
Fig. 3 )
4.3.1. Method of Auto RGB Color Balance
1) Input the PC 1024x768 @ 60Hz 1/2 black & white pattern
(MSPG-925FS, Model:3, Pattern:65) into RGB. (using D-
sub to D-sub cable)
2) Set the PSM to Dynamic mode in Picture menu.
3) Press the IN-START key on R/C for adjustment.
[Fig.3]
4) Press the (Vol.+) key operate To set , then it becomes
automatically.
5) After downloading complete, the ‘OK’ word appears.
6) Auto-RGB OK means adjustment is completed.
* Before adjusting White-balance , the AV ADC should be
done.
5. Channel Recovery
* Use Channel Recover of System Control3
of Service Menu.
1. Press ADJ key on Service Remote Control. And then
Choice System Control3.
2. Choice Channel Recover.
3. Press key You can See "OK" letter. And Then The Set
power off automatically.
4. After Turn on the SET. You can confirm The Channel
map on Programme Edit OSD.
Warning … If you press IN-STOP key, The channel map
will disappear.

- 10 -
Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
6. EDID
* Caution
- Use the proper signal cable for EDID Download.
- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists
* Caution : - Never connect HDMI & D-sub Cable at the same
time.
- Use the proper cables below for EDID Writing.
- Download HDMI1, HDMI2 separately because
HDMI1 is different from HDMI2.
6.1 EDID Data
6.2 Data
< Analog : 128bytes>
< HDMI 1 Set : 256bytes>
< HDMI 2 : 256bytes>
Product ID
* Serial No : Controlled on production line.
* Month, Year : Controlled on production line :
ex) Monthly : ‘01’ -> ‘01’
Year : ‘2007’ -> ‘11’
* Checksum : Changeable by total EDID data.
7. White Balance
* Test Equipment
* Color Analyzer (CA-210/CH.9)
-> When you adjust LCD color temperature, on Color
analyzer (CA-210), you should use Channel 9 which is
Matrix compensated (White, Red, Green, Blue revised) by
CS-1000 and adjust in accordance with White balance
adjustment coordinate which is specified on the next.
* Color temperature standards according to CSM and Module
* White balance adjustment coordinate and color temperature
Item
Manufacturer ID
Version
Revision
Condition
GSM
Digital : 1
Digital :3
Data
1E6D
01
03
For RGB EDID For HDMI EDID
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
0x00 00 FF FF FF FF FF FF 00 1E 6D Product ID Serial No
0x01
Month/Year 01 03 01 46 27 78 EA D9 B0 A3 57 49 9C 25
0x02 11 49 4B A5 6E 00 31 40 45 40 61 40 D1 C0 01 01
0x03 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88
0x04 35 00 BC 86 21 00 00 1C 26 36 80 A0 70 38 1F 40
0x05 50 20 85 04 BC 86 21 00 00 18 00 00 00 FC 00 4C
0x06 47 20 54 56 0A 20 20 20 20 20 20 20 00 00 00 FD
0x07 00 3C 4B 1D 43 0E 00 0A 20 20 20 20 20 20 00 C/S
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
0x00 00 FF FF FF FF FF FF 00 1E 6D Product ID Serial No
0x01
Month/Year 01 03 80 46 27 78 EA D9 B0 A3 57 49 9C 25
0x02 11 49 4B A5 6E 00 31 40 45 40 61 40 D1 C0 01 01
0x03 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
0x04 45 00 C4 8E 21 00 00 1E 1B 21 50 A0 51 00 1E 30
0x05 48 88 35 00 BC 86 21 00 00 1C 00 00 00 FC 00 4C
0x06 47 20 54 56 0A 20 20 20 20 20 20 20 00 00 00 FD
0x07 00 32 4B 1C 43 0F 00 0A 20 20 20 20 20 20 01 C/S
0x00 02 03 21 F1 4E 02 11 01 03 12 13 04 14 05 21 1F
0x01 20 22 10 23 09 07 07 83 01 00 00 65 03 0C 00 10
0x02 00 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 C4 8E 21
0x03 00 00 1E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 C4
0x04 8E 21 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 25
0x05 80 C4 8E 21 00 00 9E 8C 0A D0 90 20 40 31 20 0C
0x06 40 55 00 C4 8E 21 00 00 18 4E 1F 00 80 51 00 1E
0x07 30 40 80 37 00 BC 88 21 00 00 18 00 00 00 00 C/A
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
0x00 00 FF FF FF FF FF FF 00 1E 6D Product ID Serial No
0x01
Month/Year 01 03 80 46 27 78 EA D9 B0 A3 57 49 9C 25
0x02 11 49 4B A5 6E 00 31 40 45 40 61 40 D1 C0 01 01
0x03 01 01 01 01 01 01 02 3A 80 18 71 38 2D 40 58 2C
0x04 45 00 C4 8E 21 00 00 1E 1B 21 50 A0 51 00 1E 30
0x05 48 88 35 00 BC 86 21 00 00 1C 00 00 00 FC 00 4C
0x06 47 20 54 56 0A 20 20 20 20 20 20 20 00 00 00 FD
0x07 00 32 4B 1C 43 0F 00 0A 20 20 20 20 20 20 01 C/S
0x00 02 03 21 F1 4E 02 11 01 03 12 13 04 14 05 21 1F
0x01 20 22 10 23 09 07 07 83 01 00 00 65 03 0C 00 20
0x02 00 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 C4 8E 21
0x03 00 00 1E 01 1D 00 72 51 D0 1E 20 6E 28 55 00 C4
0x04 8E 21 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 25
0x05 80 C4 8E 21 00 00 9E 8C 0A D0 90 20 40 31 20 0C
0x06 40 55 00 C4 8E 21 00 00 18 4E 1F 00 80 51 00 1E
0x07 30 40 80 37 00 BC 88 21 00 00 18 00 00 00 00 C/A
CSM Plasma LCD
Cool 11,000k 11,000k
Medium 9,300k 9,300k
Warm 6,500k 6,500k
Model Name Product Id Product Id
DEC Hex EDID Table
32LB7D XXXX XX XX XXXX
Cool CS-1000 CA-210(CH 9)
x 0.276 0.276±0.002
y 0.283 0.283±0.002
Δuv 0.000 0.000
Medium CS-1000 CA-210(CH 9)
x 0.285 0.285±0.002
y 0.293 0.293±0.002
Δuv 0.000 0.000
Warm CS-1000 CA-210(CH 9)
x 0.313 0.313±0.002
y 0.329 0.329±0.002
Δuv 0.003 0.003

- 11 -
Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
* PC (for communication through RS-232C) -> UART Baud
rate : 115200 bps
* Luminance Y AV : upper 200 cd/m2(Typ : 350 cd/m2) ->
Applying to Cool mode
* Connecting picture of the measuring instrument (On
Automatic control)
Inside PATTERN is used when W/B is controlled. Connect
to auto controller or push control R/C IN-START -> Enter
the mode of White-Balance, the pattern will come out.
* Measurement color analyzer : CS1000 or CA210(CH.9)
* Auto-control interface and directions
1. Adjust in the place where the influx of light like floodlight
around is blocked. (Illumination is less than 10ux).
2.-. In case of PDP: Measure and adjust after sticking the
Color Analyzer (CA-100+, CA-210 ) to the side of the
module.
-. In case of LCD: Adhere closely the Color Analyzer ( CA-
210 ) to the module less than 10cm distance, keep it with
the surface of the Module and Color Analyzer’s Prove
vertically.(80~100°).
3. Aging time
-. After aging start, keep the power on (no suspension of
power supply) and heat-run over 15 minutes.
-. In case of PDP, keep white pattern using inside pattern.
-. In case of LCD, using ‘no signal’ or ‘full white pattern’ or the
others, check the back light on.
7.1 Auto white Balance(Set: RS-233 Host: PC, Baud Rate:
115200bps, Download: Cortez).
; Inside pattern is used when white balance is controlled.
Connect as below figure and click the start button on W/B
execution program. W/B is automatically processing
Cool_Medium_Warm in order. When W/B is completed,
you can see ‘OK’ on PC monitor.
7.2 Manual white Balance
One of R Gain / G Gain / B Gain should be kept on 80, and
others are controlled lowering from 80
1) Press "power on" of the control R/C, set heat run to
white by pressing , and heat run over 15 minutes
(Set: RS-233 Host: PC, Baud Rate: 115200bps,
Download: Cortez).
2) Zero Calibrate CA-210, and when controlling, stick the
sensor to the center of LCD module surface.
3) Double click In-start key on Controlling R/C and get in
‘white balance’.
4) Set test-pattern on and display inside pattern. Control is
carried out on three color temperature, COOL, MEDIUM,
WARM. (Control is carried out three times,)
5) When the R/G/B GAIN is 80 on OSD, it is the FULL
DYNAMIC Range of the Module. In order to control white
balance without the saturation of FULL DYNAMIC
Range and DATA, one of R Gain / G Gain / B Gain
should be kept on 80, and other two is controlled
lowering from 80.
* Color Temperature: Cool, Medium, Warm
1. When R GAIN is set to 80
- Control G GAIN and B GAIN by lowering from 80.
2. When B GAIN is set to 80
- Control R GAIN and G GAIN by lowering from 80.
3. When G GAIN is set to 80
- Control R GAIN and B GAIN by lowering from 80.
One of R Gain / G Gain / B Gain should be kept on 80,
and adjust other two lower than 80.
(When R/G/B GAIN are all 80, it is the FULL
DYNAMIC Range of Module)

- 12 -
Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
TROUBLESHOOTING
1. No power
(1) Symptom
1) Doesn't minute discharge at module.
2) Non does not come in into the front LED.
(2) Check follow
Plug in power cord.
No
Yes
Is plug inpower
cord ?
Connect cable.
No
Is connect the Line
Filter and Power
Board Cable?
Replace fuse.
No
Is normal the
Fuse(F100) on Power
Board?
Connect cable.
After remove the cable connect to Power Board
(except the SC100 connection cable), authorizes
the AC voltage marking on manual.
When ST-BY 5V does not operate, replace Power
Board.
No
Is connect the Power
Board and 13P of VSC
Board Cable?
Yes
Yes
Yes

- 13 -
Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2. Protect mode
(1) Symptom
1) After once shining, it does not discharge minutely from module.
2) The relay falls.(The sound is audible "click")
3) It is converted with the color where the front LED is red from green
(2) Check follow
Is normal the Power
Board ? Replace Power Board.
Is output the normality Low/High
voltage except Stand-by 5V?
Yes
No No
Is normal the each
connector? Replace connector.
After connecting well each connector,
the normality it operates?
Yes
No No
Is normal the VSC
Board?
After remove P900, P901 normal
operation: Replace VSC Board
Is normal the output voltage after
remove P900, P901 of VSC Board?
No No

- 14 -
Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. No Raster
(1) Symptom
1) No OSD and image occur at screen.
2) It maintains the condition where the front LED is green.
(2) Check follow
Check the LCD Module
Replace the
Power board.
Does
minute discharge
at Module?
Is the inverter
on?
Is output the normality
Low/High voltage except
Stand-by 5V?
Yes
No No
Is the LVDS cable
normal?
Yes
Is the IC700
(FLI8548) Output
normal?
Reconnect the LVDS cable in
P800
No
Replace the VSC.
No
Yes

- 15 -
Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. In case of occur strange screen into specific mode.
1) In case of does't display the OSD
(1) Symptom
1) LED is green.
2) The minute discharge continuously becomes accomplished from module.
(2) Check follow
Cable inserts well.
Is normal the LVDS
cable?
Is the LVDS cable
connected well? Replace cable.
Yes
No Yes
Replace VSC B/D
Yes
Is normal
the VSC Board?
Yes
Is normal the Ctrl
Board of Module?
Operates the FIL8548
IC(IC700)?
No
Replace Ctrl B/D.
No
No
Replace FIL8548 IC(IC700)
No

- 16 -
Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
2) In case of does't display the screen into specific mode
(1) Symptom
1) The screen does not become the display from specific input mode
(RF, AV, Component, RGB, DVI).
(2) Check follow
1) Check the all input mode should become normality display.
2) Check the Video(Main)/Data(Sub), Video(Main)/Video(Sub) should become
normality display from the PIP mode or DW mode. (Re-Check it Swap)
(3) In case of becomes unusual display from RF mode
Cable inserts well.
Is normal the
Tuner?
Is the Tuner Cable
connected well?
Is normal the Input voltage, IIC
Communication and CVBS output?
Yes
No
Replace Tuner
Replace IC
Is normal the
CXA2069Q?
Yes
Block A
Is normal the Input voltage, IIC
ommunication and HV sync?
No
No
No
No
Yes
Replace IC
Is normal the
FIL8548?
Is normal the Input voltage, IIC
Communication and HV sync?
No No

- 17 -
Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
(4) In the case of becomes unusual display from side S-video/AV mode.
Check the input source.
Is Video input of the
AV Jack (P1400)
normal?
Yes
No
Is normal the Input voltage, IIC
Communication and HV sync?
Is normal the
CXA2069Q?
Same as Block A
Is normal the Input voltage, IIC
Communication and CVBS output?
Yes
No Yes
Replace IC
Yes
(5) In the case of becomes unusual display from Component, RGB mode.
Check the input source.
Is R,G,B input and
H,V Sync of the J1100
normal?
Yes
No
Same as Block A
(6) In the case of becomes unusual display from HDMI mode.
Is normal the Input voltage, IIC
Communication and HV sync?
Is normal the
HDMI002 (IC1004)?
Yes
No
Same as Block A

- 18 -
Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
5. In case of no sound.
(1) Symptom
1) LED is green.
2) Screen display but sound is not output
(2) Check follow
All input (mode)
is no sound? Is the speaker on it
men?
Yes Yes
Is the speaker
cable normal?
Yes
Yes
Only HDMI is
No sound?
Yes
Only RF is no
sound?
Yes
Only
AV/component/PC
input is no sound?
Only specific input
(except HDMI, DTV,
RF) is no sound?
No
No
No
No
No
Download the EDID data.
Check the Tuner IN/OUT
Is the output of
CXA2069 normal?
Set on speaker
in the menu.
No Replace
CXA2069
No
Check the Speaker
cable
No
IC300 operating
normal? Replace IC300
No
Yes
IN1301 operating
normal?
Replace IC1301
(STA335BW)
Replace the VSC BD
Yes
Check the signal after
CXA2069 refer to circuit
diagram
Check the signal before
CXA2069 refer to circuit
diagram
No
Yes

- 19 -
Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
BB
BBLL
LLOO
OOCC
CCKK
KK DD
DDIIIIAA
AAGG
GGRR
RRAA
AAMM
MM
STI5100G FLI8548
CXA2069Q
TDFC-G116P
SDRAM
256Mbit
Flash memory
32Mbit
MSP4450K
STA33 5BW
Flash memory
32Mbit
SDRAM
256Mbit
STDMI002A
HDMI
SWITCH
AM_AUDIO AV_LR OUT
S-VIDEO
AV1 CVB S
AV1 LR
TUNERCVBS
PC SOUND
MNT_LR OUT
MNT_VIDEO OUT(CVBS)
COMP1YPbPr
COMP2YPbPr
RGBHV
TMDS
COMP2 LR COMP1 LR
I2S SPK
DIGITAL TS
656 data
LCD PANLE PDP PANLE
LVDS
I2C
I2S
SWITCH
I2S
DTV I2S / SPDIF
HDMI I2S / SPDIF
SPDIF OU T
RF-SWITCH
BLOCK DIAGRAM

- 20 -
Copyright©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
CC
CCOO
OORR
RRTT
TTEE
EEZZ
ZZ BB
BBLL
LLOO
OOCC
CCKK
KK
STI5100G FLI8548
CXA2069Q
SDRAM
256Mbit
Flash memory
32Mbit
MSP4450K
STA33 5BW
Flash memory
32Mbit
SDRAM
256Mbit
STDMI002A
HDMI
SWITCH
AM_AUDIO AV_LR OUT
S-VIDEO
AV1 CVB S
AV1 LR
TUNERCVBS
PC SOUND
MNT_LR OUT
MNT_VIDEO OUT(CVBS)
COMP1YPbPr
COMP2YPbPr
RGBHV
TMDS
COMP2 LR COMP1 LR
I2S SPK
DIGITAL TS
656 data
LCD PANLE PDP PANLE
LVDS
I2C
I2S
SWITCH
I2S
DTV I2S / SPDIF
HDMI I2S / SPDIF
SPDIF OUT
19.6608 MHz
CORTEZ PLUS
FLI8548
FSDKSEL1 FSDKSEL0 FSWE FSCAS FSRAS OCM_RE OCM_WE ROM_CS
COMP1YPbPr
COMP2YPbPr
RGBHV
AI_ONOFF
BOOSTER
5V_ON
EEPROM_WP
OAD_CONT
COR_STI_SWITCH
3.3V_ON
SW_RESET
LED R / G
CEC
INV_CTL/VAVS_ON
TUNER3.3V ON
3_STATE_BUFFER
MNT_MUTE_LINE
MNT_MUTE_L INE
MUTE_MAIN
FSDKSEL1 FSDKSEL0 FSWE FSCAS FSRAS OCM_RE OCM_WE ROM_CS
FLASH MEMORY
32MBIT
SDRAM
256MBIT
EEPROM
I2C
EEPROM
(HDCP KEY)
I2C (HDCP)
HDMI 5V DET
5V MNT
IR
KEY
DTV 656 DATA
PWM_DIM
RL_ON
HDMI I2S
AC_DET
FAN_ALARM / FAN_ALARM 2
8V / 9V ON
MAIN V/Y OUT
HDMI SW
Y_HPD
LVDS
LCD PANLE PDP PANLE
I2C
TDFC-G116PRF-SWITCH