LG 32LG350H User manual

LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LD85F
MODEL : 32LG350H 32LG350H-TA
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only
Printed in KoreaP/NO : MFL39166115 (0906-REV00)

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Only for training and service purposes
CONTENTS
CONTENTS .............................................................................................. 2
PRODUCT SAFETY ................................................................................. 3
SPECIFICATION ....................................................................................... 6
ADJUSTMENT INSTRUCTION ................................................................ 9
TROUBLE SHOOTING ........................................................................... 14
BLOCK DIAGRAM.................................................................................. 24
EXPLODED VIEW .................................................................................. 25
SVC. SHEET ...............................................................................................

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Only for training and service purposes
- 3 -
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 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 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 1MΩ and 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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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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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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Only for training and service purposes
- 6 -
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement
.
1. Application range
This specification is applied to the LCD TV used LD85F
chassis.
2. Requirement for Test
Each part is tested as below without special appointment.
1) Temperature : 25±5ºC (77±9ºF), CST : 40±5ºC
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
Model Market Appliance
32LG350H-TA Middle East Asia Safety : IEC/EN60065
EMI : CISPR13
4. Module general specification
Item Specification Remark
Display Screen Device 32” wide Color Display LCD
Aspect Ratio 16:9
LCD Module 32” TFT-LCD FHD LGD
Storage Environment Temp. : -20 ~ 60 deg
Humidity : 10 ~ 90%
Input Voltage AC100-240V~, 50/60Hz
Power consumption Typ. : 160, Max : 192 LCD(Module) + Backlight(Lamp)
Module Size 760.0(H) x 450.0(V) x 48.0(D) With Inverter
Pixel Pitch 0.36375 mm(D)
Back Light 14 EEFL
Display Colors 1.06 Billion(FHD LGD)
Coating 3H, AG

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5. Component Video Input (Y, PB, PR)
No. Specification Remark
Resolution H-freq(kHz) V-freq(Hz)
1. 720x480 15.73 60.00 SDTV, DVD 480i
2. 720x480 15.63 59.94 SDTV, DVD 480i
3. 720x480 31.47 59.94 480p
4. 720x480 31.50 60.00 480p
5. 720x576 15.625 50.00 SDTV, DVD 625 Line
6. 720x576 31.25 50.00 HDTV 576p
7. 1280x720 45.00 50.00 HDTV 720p
8. 1280x720 44.96 59.94 HDTV 720p
9. 1280x720 45.00 60.00 HDTV 720p
10. 1920x1080 31.25 50.00 HDTV 1080i
11. 1920x1080 33.75 60.00 HDTV 1080i
12. 1920x1080 33.72 59.94 HDTV 1080i
13. 1920x1080 56.250 50 HDTV 1080p
14. 1920x1080 67.5 60 HDTV 1080p
6. RGB PC Mode Table
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Proposed Remark
1. 720*400 31.468 70.08 28.321 For only DOS mode
2. 640*480 31.469 59.94 25.17 VESA Input 848*480 60Hz, 852*480 60Hz
37.684 75.00 31.50 -> 640*480 60Hz Display
3. 800*600 37.879 60.31 40.00 VESA
46.875 75.00 49.50
4 832*624 49.725 74.55 57.283 Macintosh
5. 1024*768 48.363 60.00 65.00
56.470 70.00 75.00 VESA(XGA)
60.123 75.029 78.75
6. 1280*768 47.78 59.87 79.50 VESA(WXGA)
7. 1360*768 47.72 59.8 84.75 WXGA
8. 1366*768 47.56 59.6 84.75 WXGA
9. 1400*1050 64.744 59.948 101.00 WSXGA
10. 1680*1050 62.290 59.94 147.00 WSXGA
11. 1280*1024 63.595 60.0 108.875 SXGA
12. 1920*1080 66.647 59.988 138.625 WUXGA

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7. HDMI/ DVI-PC/ DTV Mode Table
No Resolution H-freq(kHz) V-freq.(Hz) Pixel clock(MHz) Remark Proposed
PC
1 720*480 31.47 59.94 27.00 SDTV 480P(4:3)
2 720*480 31.50 60 27.027 SDTV 480P(4:3)
3 640*480 31.469 59.94 25.175 SDTV 480P(4:3)
4 640*480 31.469 60.00 25.20 SDTV 480P(4:3)
5 720*480 31.47 59.94 27.000 SDTV 480P(16:9)
6 720*480 31.50 60.00 27.027 SDTV 480P(16:9)
7 720*576 31.25 50.00 27.000 SDTV 576P
8 1280*720 37.500 50 74.25 HDTV 720P
9 1280*720 44.96 59.94 74.17 HDTV 720P
10 1280*720 45.00 60.00 74.25 HDTV 720P
11 1920*1080 33.72 59.94 74.17 HDTV 1080I
12 1920*1080 33.75 60.00 74.25 HDTV 1080I
13 1920*1080 28.12 50.00 74.25 HDTV 1080I
14 1920*1080 27.000 24.00 74.25 HDTV 1080P
15 1920*1080 26.97 23.97 74.17 HDTV 1080P
16 1920*1080 33.75 30.00 74.25 HDTV 1080P
17 1920*1080 33.716 29.976 74.25 HDTV 1080P
18 1920*1080 56.25 50.00 148.50 HDTV 1080P
19 1920*1080 67.43 59.94 148.35 HDTV 1080P
20 1920*1080 67.5 60.00 148.50 HDTV 1080P
DTV
1 720*400 31.468 70.08 28.321 HDCP
2 640*480 31.469 59.94 25.17
37.684 75.00 31.50 HDCP
3 800*600 37.879 60.31 40.00
46.875 75.00 49.50 HDCP
4 832*624 49.725 74.55 57.283 Macintosh HDCP
48.363 60.00 65.00
5 1024*768 56.470 75.00 70.00 VESA(XGA) HDCP
60.123 75.029 78.75
6 1280*768 47.78 59.87 79.5 WXGA HDCP
7 1360*768 47.72 59.8 84.75 WXGA HDCP
8 1366*768 47.56 59.6 84.75 WXGA HDCP
9 1400*1050 64.744 59.948 101.00 WSXGA HDCP
10 1680*1050 62.290 59.954 147.00 WSXGA HDCP
11 1280*1024 63.595 60.00 108.875 SXGA HDCP
12 1920*1080 66.647 59.988 138.625 WUXGA HDCP

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- 9 -
ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LCD TV with
LD85F chassis.
2. Designation
1) The adjustment is according to the order which is
designated and which must be followed, according to the
plan which can be changed only on agreeing.
2) Power Adjustment: Free Voltage
3) Magnetic Field Condition: Nil.
4) Input signal Unit: Product Specification Standard
5) Reserve after operation: Above 5 Minutes (Heat Run)
Temperature : at 25±5ºC
Relative humidity : 65±10%
Input voltage : 220V, 60Hz
6) Adjustment equipments: Color Analyzer (CA-210 or CA-
110), Pattern Generator (MSPG-925 or MSPG-1025), DDC
Adjustment Jig equipment, Service remote control.
7) Don’t push the “IN STOP KEY” after completing the
function inspection.
3. Main PCB check process
* APC - After Manual-Insult, executing APC
* Download
1) Execute ISP program “Mstar ISP Utility” and then click
“Config” tab.
2) Set as below, and then click “Auto Detect” and check “OK”
message. If display “Error”, Check connect computer, jig
and set.
3) Click “Connect” tab. If display “Can’t”, Check connect
computer, jig, and set.
4) Click “Read” tab, and then load download file(XXXX.bin) by
clicking “Read”.
5) Click “Auto” tab and set as below
6) Click “Run”.
7) After downloading, check “OK” message.
* USB DOWNLOAD
1) Put the USB Stick to the USB socket.
2) Automatically detecting update file in USB Stick
- If your downloaded program version in USB Stick is Low,
it didn’t work. But your downloaded version is High, USB
data is automatically detecting.
(1) (3)
(2) OK
Please Check Speed :
To us speed between from 200 KHz
to 400 KHz
(4)
filexxx.bin
(5)
(7) ........ OK
(6)
filexxx.bin
USBPort

3) Show the message “Copying files from memory”.
4) Updating is staring.
5) Finishing the version updating, you have to put out USB
stick and “AC Power” off.
6) After putting “AC Power” on and check updated version on
your TV.
* After downloading, have to adjust Tool Option again.
1) Push "IN-START" key in service remote control.
2) Select "MODEL SELECT" and push “OK” button.
3) Go to “INCH” and choice proper inch.
4) TV power turn off and on.
5) Completed Tool option
3.1. ADC Process
(1) PC input ADC
1) Auto RGB Gain/Offset Adjustment
- Convert to PC in Input-source
- Signal equipment displays
Output Voltage : 700 mVp-p
Impress Resolution XGA (1024 x 768 @ 60Hz)
Model : 60 in Pattern Generator
Pattern : 54 in Pattern Generator (MSPG-925, MSPG-
1025 Series)
[1/2 W.B Horizontal (Refer below picture)
- Adjust by commanding AUTO_COLOR_ADJUST.
2) Confirmation
- We confirm whether “0xAA (RGB)” address of
EEPROM “0xA2” is “0xAA” or not.
- If “0xAA (RGB)” address of EEPROM “0xA2” isn’t
“0xAA”, we adjust once more
- We can confirm the ADC values from “0xA4~0XA9
(RGB)” addresses in a page “0xA2”
* Manual ADC process using Service Remote control.
After enter Service Mode by pushing “ADJ” key,
execute “ADC Adjust” by pushing “G” key at “ADC
CALIBRATION : RGB-PC”.
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<Fig. 1> Adjustment pattern(PC)

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- 11 -
(2) COMPONENT input ADC
1) Component Gain/Offset Adjustment
- Convert to Component in Input-source
- Signal equipment displays
<MSPG-925 Series>
MODEL : 209 in Pattern Generator (480i Mode)
Pattern : 65 in Pattern Generator
MODEL : 223 in Pattern Generator (1080i Mode)
Pattern : 65 in Pattern Generator
<MSPG-1025 Series>
Model : 321 in Pattern Generator (480i Mode)
Pattern: 65 in Pattern Generator
Model : 327 in Pattern Generator (1080i Mode)
Pattern: 65 in Pattern Generator
- Adjust by commanding AUTO_COLOR_ADJUST.
2) Confirmation
- We confirm whether “0xB3 (480i)/ 0xBC (1080i)”
address of EEPROM “0xA2” is “0xAA” or not.
- If “0xB3 (480i)/0xBC(1080i)” address of EEPROM
“0xA2” isn’t “0xAA”, we adjust once more.
- We can confirm the ADC values from “0xAD~0XB2
(480i)/0XB6~BB (1080i)” addresses in a page “0xA2”.
* Manual ADC process using Service Remote control.
After enter Service Mode by pushing “ADJ” key,
execute “ADC Adjust” by pushing “G” key at “ADC
CALIBRATION : COMPONENT”.
480i Mode
1080i Mode
3.2. Function Check
(1) Check display and sound
- Check Input and Signal items. (cf. work instructions)
1) TV
2) AV (SCART/CVBS)
3) COMPONENT (480i)
4) RGB (PC : 1024 x 768 @ 60hz)
5) HDMI 1,2
6) PC Audio In
7) RJP
8) LED Clock (check with Real time clock)
9) Alarm Clock
10) Ext Speaker (1W/MONO)
11) Ext 5V/1A or 12V/1A (is different as to BOM option)
* Display and Sound check is executed by remote control.
* RJP Check process
1) Set the power supply switch as shown in the below picture.
2) Turn only the #5 switch on (Up position)
3) Use the RJ-45 cable to connect the TV and JIG.
4) Enter the IN-START mode, and select “RJP Pin Check”.
5) The check result is displayed after 1~2 seconds.
<Fig. 2> Adjustment pattern(COMPONENT)
1
2
3

4. Total Assembly line process
4.1. Adjustment Preparation
(1) W/B Equipment condition
CA210: CH 9, Test signal: Inner pattern (85 IRE)
(2) Above 5 minutes H/run in the inner pattern. (“power on”
key of adjust remote control)
(3) 15 Pin D-Sub Jack is connected to the Auto W/B
equipment.
(4) Adjust Process will start by execute I2C Command (Inner
pattern (0xF3, 0xFF).
(5) Adjust Process will finish by execute I2C Command (Inner
pattern (Inner pattern (0xF3,0x00)).
** Caution **
Color Temperature: COOL, Medium, Warm
One of R Gain/G Gain/ B Gain should be kept on 0xC0, and
adjust other two lower than C0.
* Manual W/B process using adjusts Remote control.
- After enter Service Mode by pushing “ADJ” key, enter
White Pattern off of service mode, and change off -> on.
- Enter “W/B ADJUST” by pushing “G” key at “3.W/B
ADJUST”.
* After done all adjustments, Press “In-start” button and
compare Tool option and Area option value with its BOM, if it
is correctly same then unplug the AC cable.
If it is not same, then correct it same with BOM and unplug
AC cable.
For correct it to the model’s module from factory JIG model.
* Don’t push The “IN STOP KEY” after completing the function
inspection.
4.2 DDC EDID Write (RGB 128Byte )
- Connect D-sub Signal Cable to D-Sub Jack.
- Write EDID DATA to EEPROM (24C02) by using DDC2B
protocol.
- Check whether written EDID data is correct or not.
4.3. DDC EDID Write (HDMI 256Byte)
- Connect HDMI Signal Cable to HDMI Jack.
- Write EDID DATA to EEPROM(24C02) by using DDC2B
protocol.
- Check whether written EDID data is correct or not.
* DDC EDID Write is available only ‘Power Only’ Mode.
4.4. Serial number (RS-232C)
- Press “Power on” key of service remocon. (Baud rate :
115200 bps)
- Connect RS232 Signal Cable to RS-232 Jack.
- Write Serial number by use RS-232.
- Must check the serial number at the Diagnostics of SET UP
menu. (Refer to below).
4.5. EDID DATA
(1) RGB 128Byte
(2) DIGITAL DATA(HDMI-1) 256Byte
(3) DIGITAL DATA(HDMI-2) 256Byte
1) All Data : HEXA Value
2) Changeable Data :
A. Serial No : Controlled / Data:01
B. Week : Controlled / Data:00
C. Year : Controlled
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Only for training and service purposes
Color Cool 11,000 ºK X=0.276(±0.002) <Test Signal>
Temperature Y=0.283(±0.002) Inner pattern
Medium 983000 ºK X=0.295(±0.002) (216Gray,85 IRE)
Y=0.293(±0.002)
Warm 6,500 ºK X=0.313(±0.002)
Y=0.329(±0.002)
A
B C
A
B C

4.6. HDCP (High-Bandwidth Digital Contents Protection)
SETTING (Scaler : Mstar)
- Connect D-sub Signal Cable to D-Sub Jack.
- Input HDCP key with HDCP-key- in-program.
- HDCP Key value is stored on EEPROM (AT24C512) which
is 0x80 addresses of 0xA0 page
- AC off/ on and on HDCP button of MSPG925 and confirm
whether picture is displayed or not of using MSPG925
- HDCP Key value is different among the sets.
HDCP-KEY
0xA0:0x80
89 38 AE 0D ED 40 E6 BB FA 4E DE 51 FB 8E D9 AA
34 A8 C4 EA D8 6C DC 5C 91 5C B1 A6 13 2B 8B 8B
F7 46 CC 1C 88 20 A3 27 0E E1 28 84 89 39 A3 E2
36 86 CE 67 EB A0 F2 35 6B 86 F5 21 71 95 8A 77
A1 28 77 97 D3 7B EF 5C 15 48 AA 9E 97 39 CD 98
40 5E 68 56 66 EF C1 3C E1 8F 2A 82 DE 8F 52 CC
A8 1F 37 D9 D4 C6 24 16 7E 42 FF 57 CD 6B E0 86
00 1A F1 19 5A AF 37 97 86 BA 83 29 FE 41 A8 D5
0xA1:0x00
F4 73 43 03 23 22 C5 28 96 9E 35 0D 67 A8 8B DD
7A 89 38 E0 94 F0 FF F5 8F F3 4E 5C 82 09 F3 97
EB 01 52 EC D8 98 5C 4F 43 2E E7 9F F5 85 6D 15
B1 83 20 F8 5E D0 33 4F F0 C1 8F 65 77 3D 31 B2
FB A1 6E CA A6 D3 A2 35 1D 16 41 C3 89 86 98 78
8E 3E C1 64 01 79 05 21 47 AF 6A 6F 5B E1 4D 2B
2F CC 18 8E 42 DC 9A F8 3C D0 D0 57 04 FB 14 42
8C 54 9D A9 06 EB E7 48 E2 29 EF 7E FD F6 45 12
AC E4 BC 45 67 A3 9B 65 A1 0E ED 1A 84 AD 49 87
A2 77 3F 11 A7 1B D1 7F 25 36 6C 6F D3 DF 25 D0
FB
4.7. Outgoing condition Configuration
When pressing IN-STOP key by SVC remocon, Red LED are
blinked alternatively. And then Automatically turn off. (Must
not AC power OFF during blinking)
4.8. Internal pressure
Confirm whether is normal or not when between power
board's ac block and GND is impacted on 1.5kV(dc) or
2.2kV(dc) for one second
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Only for training and service purposes
- 14 -
TROUBLE SHOOTING
1. No Power
(1) Symptom
1) It is not discharged minutely from the module.
2) Light does not come into the front LED.
(2) Check process
Plug in the power cord.
Yes
No
Connect the Cable.(SK100)
No
Is the fuse of PSU
normal?(F501)
Replace the Fuse.
Yes
No
Is it connected
that PSU and P1101 in
Main B/D?
Connect the Cable P1101.
Yes
No
After all cables connect is removed to PSU, the
AC voltage marking is authorized on manual.
When ST-BY 5V is not operated, replace PSU.
Is inserted a plugged
in power cord?
Is the Line Filter and
PSU connected?

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- 15 -
Yes
Yes
No No
Replace the Power board.
Check the LCD Module.
Reconnect Panel link cable.
(P401 or P406 or P401)
Replace the Q1104.
No
Yes
No
No
Does minute discharge
at Module?
Is the link
cable normal?
Is the Q1104’s
output normal?
Is the inverter
/ VaVs on?
2. No Raster
(1) Symptom
1) No OSD and image occur at screen.
2) It maintains the condition where the front LED is blue.
(2) Check process
Is output the normality
Low/High voltage except
Stand-by 5V?
Yes
No
No
Yes
Check the Power.
Cable inserts well.
Change the IC(IC100).
Yes
No
No
Check the Tuner.
Is video
output of the Tuner
normal?(Check TU500
_Pin15)
Is the LVDS cable
connected well?
Is the input
voltage normal?
(Check Pin4)
Is the I2C communication
Normal?(Check Pin10, Pin11)
3. Unusual display from TV/CATV mode
BLOCK A

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- 16 -
Yes
No
Check the input source.
Same as Block A.
Same as Block A.
No
Check the IC700.
No
Yes
Is video
input of SCART Jack
normal?(Check JK601
_Pin20)
Check the input source.
Is video
input of the SCART Jack
normal?(Check JK601_
Pin7,11,15)
No
Is waveform
of Switching IC normal?
(Check IC700_Pin11,
12,13)
4. Unusual display from AV1(SCART) mode
- CVBS Input - RGB Input
5. Unusual display from AV2(SIDE AV) mode
- CVBS Input
Yes
No
Same as Block A.
Is video input
of RCA Jack normal?
(Check R704)
Check the input source.
6. Unusual display from Component mode
Yes
No
Same as Block A.
Is video input
of the Component Jack
normal?(Check R733,
734,735)
Check the input source.

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- 17 -
Check the input source.
Same as Block A.
No
Check the IC700.
No
Yes
Is video input
of the RGB Jack normal?
(Check JK703_Pin1,
2,3,13,14)
No
Is waveform
of Switching IC normal?
(Check IC700_Pin11,
12,13)
7. Unusual display from RGB mode
Check the input source.
Same as Block A.
No
Check the IC900, IC901.
No
Check the IC902.
No
Check the IC902.
No
Yes
Is video
input of the HDMI
jack normal? (Check
JK900,901)
Yes
Check DDC
communication
lines(IC900,901_
Pin5,6
Yes
Check HDCP
communication lines
(IC902)
No
Is waveform
of Switching IC normal?
(Check IC902)
8. Unusual display from HDMI 1/2 mode

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Yes
No
Set on speaker on menu.
Download the EDID data.
Check the Tuner in/Out.
No
Check th Speaker cable.
No
Replace IC100.
No
Replace IC1000.
Replace main board.
No
Yes
No
No
All input is no sound?
Only HDMI is
no Sound?
Only RF or DTV
is no sound?
Is the speaker
“on” on menu?
Is the Speaker
cable normal?
9. No Sound
(1) Symptom
1) LED is blue
2) Screen display but sound is not output.
(2) Check process
Yes
IC100 operate
normally?
Yes
IC1000 operate
normally?
Yes
Yes

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Check the input source.
Check the speaker wire.
No
Re-solder or replace the IC100.
No
Re-solder or replace the IC2001.
No
Replace the external speaker
No
Yes
Check the input
source?
Yes
IC100 operate
normally?
Yes
IC2001 operate
normally?
No
Check the external
speaker
10. Don’t operate the external speaker out

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Check the RS-232C Pin7(5V_OUT).
Check the RS232C Pin9(12V_OUT).
Set “YES” on SVC menu.
No
Re-solder or replace the defect part.
No
Re-solder or replace the defect part.
No
Yes
Is the 5V or 12V Out
“YES” on SVC menu?
Yes
Check the
on/off control of IC100
R160:5V
R142:12V
No
Check the operation
of Q1205.
11. Don’t operate 5V out or 12V out
Check the RS-232C Pin4.
Replace the Preamp of IR ass’y.
No
Re-solder or replace the defect part.
No
Yes
Check the IR waveform
of L403.
No
Check the IR waveform
of IC1304_Pin3.
12. Don’t operate IR out