LG 42LC7D Series User manual

R
LCD TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : LB73A
MODEL : 42LC7D 42LC7D-AB
website:http://biz.LGservice.com

- 2 -
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ..........................................................................3
SPECIFICATION ........................................................................................6
ADJUSTMENT INSTRUCTION .................................................................9
TROUBLE SHOOTING ............................................................................13
BLOCK DIAGRAM...................................................................................19
EXPLODED VIEW .................................................................................. 21
REPLACEMENT PARTS LIST ............................................................... 23
SVC. SHEET ...............................................................................................

- 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 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

- 4 -
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

- 5 -
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.

- 6 -
1. Application range
This specification is applied to LB73A chassis.
2. Requirement for Test
Testing for standard of each part must be followed in below
condition.
(1) Temperature : 25°C±5°C(77±9°F)
(2) Humidity : 65%±10%
(3) Power : Standard input voltage (AC 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
3.1 Performance : LGE TV test method followed
3.2 Demanded other specification
Safety : CB Specification
EMC : CISPR 13 Specification
SPECIFICATION
NOTE : Specifications and others are subject to change without notice for improvement .
4. General TV Specification
No Item Specification Remark
1. Broadcasting system PAL-B/G, DTV : DVB-T
2. Available Channel 1) VHF : 0~5, 5A, 6~9, 9A,10~12
2) UHF : 20 ~ 75
3) CATV: 02 ~ 44
4) DTV : 06 ~9, 9A, 10~12, 27 ~ 69
3. Tuner IF 1) PAL : 38.90MHz(Picture),
34.40MHz(Sound)
2) DVB-T : 36.125MHz
4. Input Voltage AC 240 V, 50Hz Maker : LGE
5. LCD Module 37" : LC370WX3-SLA1 WXGA Maker : LG Philips LCD
42" : LC420WX6-SLA1 WXGA
6. Aspect ratio 16:9 (wide)
7. Operating Temperature 0 40 deg
8. Operating Humidity 85 %
9. Storage Temperature -20 60 deg
10. Storage Humidity 85 %

- 7 -
5. Chroma & Brightnes
No Item Min Typ Max Unit Remark
1. White peak Brightness 360 450 cd/m2HDMI input, full white,
Video Black level=Hight
2. Contrast Ratio 600 : 1 800 : 1
3. Brightness uniformity 1.3 Refer to LCD spec.
4. Color coordinate RED X 0.633 ± 0.03
Y0.339 ± 0.03
GREEN X 0.286 ± 0.03
Y0.610 ± 0.03
BLUE X 0.147 ± 0.03
Y0.065 ± 0.03
WHITE X 0.272 ± 0.03
Y0.278 ± 0.03
5. Viewing Angle(H/V) 178 CR > 10
6. Color Temperature Cool 8,300 9,300 10,300
Warm 10,000 11,000 12,000
Medium 5,500 6,500 7,500
6. Component Video Input (Y, PB, PR)
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks
1. 720*576 15.625 50.00 13.50 SDTV576i
2. 720*576 31.25 50.00 27.00 SDTV 576p
3. 720*480 15.73/15.75 59.94/60.00 13.50 SDTV 480i
4. 720*480 31.47/31.50 59.94/60.00 27.00 SDTV 480p
5. 1280*720 44.96/45.00 59.94/60.00 74.25 HDTV 720P
6. 1280*720 37.50 50.00 74.25 HDTV 720P
7. 1920*1080 33.72/33.75 59.94/60.0 74.25 HDTV 1080i
8. 1920*1080 28.125 50.00 74.25 HDTV 1080i
9. 1920*1080 67.432/67.500 59.939/60 148.5 HDTV 1080P
10. 1920*1080 56.25 50 148.5 HDTV 1080P
11. 1920-1080 26.97/27.000 23.97/24.000 74.25 HDTV 1080P
12. 1920*1080 33.71/33.75 29.97/30.000 74.25 HDTV 1080P

- 8 -
8. HDMI/DVI input (DTV / PC)
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks
DTV
1. 720*576 31.25 50.00 27.00 SDTV 576p
2. 720*480 31.47/31.50 59.94/60.00 27.00 SDTV 480p
3. 1280*720 44.96/45.00 59.94/60.00 74.25 HDTV 720P
4. 1280*720 37.50 50.00 74.25 HDTV 720P
5. 1920*1080 33.72/33.75 59.94/60.0 74.25 HDTV 1080i
6. 1920*1080 28.125 50.00 74.25 HDTV 1080i
7. 1920*1080 67.432/67.500 59.939/60 148.5 HDTV 1080P
8. 1920*1080 56.25 50 148.5 HDTV 1080P
9. 1920*1080 26.97/27.000 23.97/24.000 74.25 HDTV 1080P
10. 1920*1080 33.71/33.75 29.97/30.000 74.25 HDTV 1080P
PC
11. 640*480 31.469 59.94 25.17 VESA(VGA)
12. 640*480 37.861 72.80 31.50 VESA(VGA)
13. 640*480 37.500 75.00 31.50 VESA(VGA)
14. 800*600 35.156 56.25 36.00 VESA(SVGA)
15. 800*600 37.879 60.31 40.00 VESA(SVGA)
16. 800*600 48.077 72.18 50.00 VESA(SVGA)
17. 800*600 46.875 75.00 49.50 VESA(SVGA)
18. 1024*768 48.363 60.00 65.00 VESA(XGA)
19. 1024*768 56.476 70.06 75.00 VESA(XGA)
20. 1024*768 60.023 75.02 78.75 VESA(XGA)
21. 1280*768 47.776 59.870 79.5 CVT(WXGA)
22. 1360*768 47.720 59.799 84.750 CVT(WXGA)
23. 1366*768 47.13 59.65 72.00
7. RGB input (PC)
No Resolution H-freq(kHz) V-freq.(kHz) Pixel clock(MHz) Remarks
1. 640*350 31.468 70.09 25.17 EGA
2. 640*480 31.469 59.94 25.17 VESA(VGA)
3. 640*480 37.861 72.80 31.50 VESA(VGA)
4. 640*480 37.500 75.00 31.50 VESA(VGA)
5. 800*600 35.156 56.25 36.00 VESA(SVGA)
6. 800*600 37.879 60.31 40.00 VESA(SVGA)
7. 800*600 48.077 72.18 50.00 VESA(SVGA)
8. 800*600 46.875 75.00 49.50 VESA(SVGA)
9. 1024*768 48.363 60.00 65.00 VESA(XGA)
10. 1024*768 56.476 70.06 75.00 VESA(XGA)
11. 1024*768 60.023 75.02 78.75 VESA(XGA)
12. 1280*768 47.776 59.870 79.5 CVT(WXGA)
13. 1360*768 47.720 59.799 84.750 CVT(WXGA)
14. 1366*768 47.13 59.65 72.00

- 9 -
ADJUSTMENT INSTRUCTION
1. Application Object
These instructions are applied to all of the 37"/42" LCD TV,
LB73A Chassis
2. Notes
(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 equipment.
(2) Adjustments must be done in the correct order.
(3) The adjustments must be performed in the circumstance of
25±5°C of temperature and 65±10% of relative humidity if
there is no specific designation.
(4) The input voltage of the receiver be must kept 220V~,
60Hz when adjusting.
(5) The receiver must be operational for about 15 minutes
prior to the adjustments.
* Perform preliminary operation after receiving White Pattern.
* White Pattern entry method
- Turn the power on.
- 100% FULL WHITE PATTERN appears if pressing the
Power on key of adjustment remote control.
* Set is activated HEAT RUN without signal generator in this
mode.
Notice) If you turn on a still screen more than 20 minutes
(Especially Digital pattern, Cross Hatch Pattern), an
afterimage may occur in the black level part of the screen.
3. CPLD Download
(1) Test Equipment: PC, Jig for download
(2) Connect the power of VSC B/D.
(3) Execute download program of PC.
(4) After executing the hot key on the Programmer, click
‘program icon’.
(5) End after confirming.
4. MST3361M-Set Adjustment
4-1. Synopsis
MST3362M-Set adjustment to set the black level and the Gain
of optimum with an automatic movement from the analog =>
digital converter.
4-2. Test Equipment
Service R/C, MSPG-925 Pattern Generator
(480i, 1080i 60Hz Color Bar Pattern output will be possible
and the output level will accurately have to be revised with
0.7±0.1VP-P)
4-3. Adjustment
(1) How to adjustment the Component1
1) Select Component1 as the input with Color Bar Pattern
in 480i 60Hz mode and select ‘Component1’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘1. ADC 480i Comp1’. Pressing the Vol+
Key to adjust the component1.
3) When the adjustment is over, 'Component1 Adjustment
OK’ is displayed. If the adjustment has errors,
'Component1 Adjustment Failed! Try Again!’ is
displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
(2) How to adjustment the Component2, RGB
1) Select Component2, RGB-DTV as the input with Color
Bar Pattern in 1080i 60Hz mode and select
‘Component2’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘2. ADC 1080i Comp2/RGB’. Pressing
the Vol+ Key to adjust the component2.
3) When the adjustment is over, 'Component2 Adjustment
OK’ is displayed. If the adjustment has errors,
'Component2 Adjustment Failed! Try Again!’ is
displayed. and If the adjustment has errors, 'RGB
Adjustment Failed! Try Again!’ is displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
LCD TV SET
<Fig. 1> Connection Diagram of CPLD Download
<Fig. 2> Adjustment Pattern: 480i/1080i 60Hz Colot Bar Pattern

5. Video(uPD)-Set adjustment
5-1. Synopsis
This is a adjustment to reduce the color difference of video
signal Main/Sub Display.
5-2. Required Equipment
Service R/C, MSPG-925 Pattern Generator.
5-3. Adjustment
(1) How to adjustment the uPD PAL
1) Select AV1 as the input with 100% 8 Color Bar Pattern
in PAL mode and select ‘AV1’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘3. uPD PAL(Main&Sub)-Set’. Pressing
the Vol+ Key to adjust the uPD PAL.
3) When the adjustment is over, 'uPD64015 PAL Main
Adjustment OK’ and ‘uPD64015 PAL Sub Adjustment
OK’ is displayed. If the adjustment has errors,
'uPD64015 PAL Main Error!’ or 'uPD64015 PAL Main
Error!’ is displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
(2) How to adjustment the uPD NTSC
1) Select AV1 as the input with 100% 8 Color Bar Pattern
in NTSC mode and select ‘AV1’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘4. uPD NTSC(Main&Sub)-Set’. Pressing
the Vol+ Key to adjust the uPD NTSC.
3) When the adjustment is over, 'uPD64015 NTSC Main
Adjustment OK’ and ‘uPD64015 NTSC Sub Adjustment
OK’ is displayed. If the adjustment has errors,
'uPD64015 NTSC Main Error!’ or 'uPD64015 NTSC
Main Error!’ is displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
6. EDID(The Extended Display Identification Data)
/DDC(Display Data Channel) Download
This is the function that enables “Plug and Play".
6-1. Required Test Equipment
(1) PC, Jig for adjusting DDC.
(PC serial to D-sub Connection equipment)
(2) DVI to HDMI Connector.
- 10 -
Analog EDID
D-sub to D0sub
HDMI EDID
DVI-D to HDMI or HDMI to HDMI
(Fig. 3) Adjust Pattern :100% 8 Color Bar Pattern

6-2. Setting of Device
6-3. EDID DATA
6-3-1. 37LC7D-AB
(1) EDID DATA PORT1 for HDMI
(2) EDID DATA PORT2 for HDMI
(3) EDID DATA for RGB
6-3-2. 42LC7D-AB
(1) EDID DATA PORT1 for HDMI
(2) EDID DATA PORT2 for HDMI
(3) EDID DATA for RGB
- 11 -
0123456789ABCDEF
000FFFFFFFFFFFF001E6D010001010101
10 0E 10 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C 2F CE 00 31 40 45 40 61 40 01 01 01 01
30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88
40 35 00 BC 88 21 00 00 18 F3 39 80 18 71 38 2D 40
50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 38
60 4B 1F 44 0F 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 68
0123456789ABCDEF
002031DF14E2022101F01020304051293
10 14 07 16 23 15 07 50 65 03 0C 00 10 00 01 1D 00
20 72 51 D0 1E 20 6E 28 55 00 C4 8E 21 00 00 1E 01
30 1D 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 00
40 9E 8C 0A D0 90 20 40 31 20 0C 40 55 00 4C 6C 42
50 00 00 18 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 4C
60 6C 42 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 25
70 80 4C 6C 42 00 00 9E 00 00 00 00 00 00 00 00 CC
0123456789ABCDEF
000FFFFFFFFFFFF001E6D010001010101
10 0E 10 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C 2F CE 00 31 40 45 40 61 40 01 01 01 01
30 01 01 01 01 01 01 01 1D 00 72 51 D0 1E 20 6E 28
40 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 16 20
50 58 2C 25 00 C4 8E 21 00 00 9E 00 00 00 FC 00 4C
60 47 20 54 56 0A 20 20 20 20 20 20 20 00 00 00 FD
70 00 38 4B 1F 3C 09 00 0A 20 20 20 20 20 20 01 59
0123456789ABCDEF
002031DF14E 20 22101F0102 0304051293
10 14 07 16 23 15 07 50 65 03 0C 00 20 00 8C 0A D0
20 8A 20 E0 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C
30 0A D0 8A 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00
40 18 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 9F
0123456789ABCDEF
000FFFFFFFFFFFF001E6D01 0001 01 01 01
10 0E 10 01 03 18 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C AF CE 00 01 01 01 01 01 01 01 01 01 01
30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88
40 35 00 BC 88 21 00 00 1C F3 39 80 18 71 38 2D 40
50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 38
60 4B 1F 44 0F 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 00 DE
0123456789ABCDEF
000FFFFFFFFFFFF001E6D010001010101
10 0E 10 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C 2F CE 00 31 40 45 40 61 40 01 01 01 01
30 01 01 01 01 01 01 1B 21 50 A0 51 00 1E 30 48 88
40 35 00 BC 88 21 00 00 18 F3 39 80 18 71 38 2D 40
50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 38
60 4B 1F 44 0F 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 68
0123456789ABCDEF
002031DF14E2022101F01020304051293
10 14 07 16 23 15 07 50 65 03 0C 00 10 00 01 1D 00
20 72 51 D0 1E 20 6E 28 55 00 C4 8E 21 00 00 1E 01
30 1D 80 18 71 1C 16 20 58 2C 25 00 C4 8E 21 00 00
40 9E 8C 0A D0 90 20 40 31 20 0C 40 55 00 4C 6C 42
50 00 00 18 01 1D 00 BC 52 D0 1E 20 B8 28 55 40 4C
60 6C 42 00 00 1E 01 1D 80 D0 72 1C 16 20 10 2C 25
70 80 4C 6C 42 00 00 9E 00 00 00 00 00 00 00 00 CC
0123456789ABCDEF
000FFFFFFFFFFFF001E6D010001010101
10 0E 10 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C 2F CE 00 31 40 45 40 61 40 01 01 01 01
30 01 01 01 01 01 01 01 1D 00 72 51 D0 1E 20 6E 28
40 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 16 20
50 58 2C 25 00 C4 8E 21 00 00 9E 00 00 00 FC 00 4C
60 47 20 54 56 0A 20 20 20 20 20 20 20 00 00 00 FD
70 00 38 4B 1F 3C 09 00 0A 20 20 20 20 20 20 01 59
0123456789ABCDEF
002031DF14E 20 22101F0102 0304051293
10 14 07 16 23 15 07 50 65 03 0C 00 20 00 8C 0A D0
20 8A 20 E0 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C
30 0A D0 8A 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00
40 18 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 9F
0123456789ABCDEF
000FFFFFFFFFFFF001E6D01 000101 01 01
10 0E 10 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C 2F CE 00 31 40 45 40 61 40 01 01 01 01
30 01 01 01 01 01 01 01 1D 00 72 51 D0 1E 20 6E 28
40 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C 16 20
50 58 2C 25 00 C4 8E 21 00 00 9E 00 00 00 FC 00 4C
60 47 20 54 56 0A 20 20 20 20 20 20 20 00 00 00 FD
70 00 38 4B 1F 3C 09 00 0A 20 20 20 20 20 20 01 59

- 12 -
7. Adjustment of White Balance
7-1. Required Equipment
(1) Color analyzer (CA-210 or similar product)
(2) Automatic adjustor (with automatic adjustment hour
necessity and the RS-232C communication being possible)
7-2. Connection Diagram of Equipment
for Measuring (Automatic Adjustment)
7-3. Process of automatic adjustment
(1) As using the white pattern for adjustment the inner part,
HDMI connection need not. But as lower part, the RS-232C
Command is used.
Wb 00 00 start of automatic adjustment the white balance.
Wb 00 10 Start of gain adjustment.(inside pattern)
Ja 00 ff Adjustment Date.
Jb 00 c0
...
Wb 00 1f Ending gain adjustment.
As occasion demands , adjust the offset.
( Wb 00 20(Start) , Wb 00 2f(end))
Caution) When you adjust automatically, RS-232C
Command is used.
* Baud Rate : 115200
[ RS-232C Command (Automatic Adjustment)
- Operate the automatic adjustment by using ‘power only’ key
on service remote control. And set the Baud Rate to 115200.
- It must start to “wb 00 00”, complete to “wb 00 ff”.
- Adjust offset.
7-4. Adjustment of White Balance
(Passivity Adjustment)
O Operate Zero Calibration of the CA-210.
O Manual adjustment is also possible by the following sequence.
(1) Enter to ‘7. White-Balance’ by pressing the ADJ key on the
service remote control.
(2) Select Test Pattern White with ADJ key and HEAT RUN at
least 15 minutes.
(3) Select picture control condition to ‘Dynamic’.
Stick the sensor on center of screen. And select ‘6.White-
Balance of ‘Ez- Adjust’ with ADJ key on service remote
control and Enter to adjustment mode by pressing right
key(G).
(4) Adjust with Volume ± key.
- Value of bright : High Level -> 216gray
[Cool]
Color coordinates : X; 0.272±0.015 Y; 0.278±0.015
Color temperature: 12000°K ±1000°K
dUV: ±0dUV
[Medium]
Color coordinates : X; 0.285±0.015 Y; 0.293±0.015
Color temperature: 9300°K±1000°K
dUV: ±0dUV
[Warm]
Color coordinates : X; 0.313±0.015 Y; 0.329±0.015
Color temperature: 6500°K±1000°K
dUV: ±3dUV
(5) After adjustment is completed, move to ‘Ez-Adjust’ by
pressing A key exit the adjustment mode by pressing the
ADJ key.
216 FULL WHITE
MSPG-925 series
Window
COLOR
ANALYZER
TYPE; CA-210
HDMI signal input
LCD TV part
R Gain
G Gain
B Gain
R Offset
G Offset
B Offset
CENTER
(DEFAULT)(Hex)
00
00
00
FE
FE
FE
7f
7f
7f
Min Max
C0
C0
C0
40
40
40
Cool
C0
C0
C0
41
42
41
Mid
C0
C0
C0
41
41
40
Warm
RS-232C COMMAND
[CMD ID DATA]
jg
jh
ji
Cool
ja
jb
jc
Mid
jd
je
jf
Warm

- 13 -
TROUBLESHOOTING
Check TU800 Pin8(Video output) Can you see the normal signal?
YES
Could you measure voltage of TU800 & IIC lines? Are they all normal?
You should replace TUNER.
YES
NO
Check the input(Pin63) of AV switch(IC603). Can you see the normal waveform?
YES
Check the output(Pin56) of AV switch(IC603). Can you see the normal waveform?
YES
Check the input(Pin148) of Decorder(IC901). Can you see the normal waveform?
YES
Check the output signal of Decorder(IC901). Can you see the normal waveform?
Check the input and output of HD2.4(IC401). Especially you should check The H,V sync and clock. Can you see the normal waveform?
YES
After checking the Power of AV switch you should decide to replace AV switch or not.
After checking the Power of AV switch you should decide to replace AV switch or not.
After checking the Power of Decorder you should decide to replace Decorder or not.
After checking the Power of Decorder you should decide to replace Decorder or not. This board has big problem because Main chip(HD2.4) have some troubles. After checking thoroughly all path once again, You should decide to replace HD2.4 or not.
You should check power lin & IIC lines.
NO
NO
NO
NO NO NO
TV/CATV doesn’t display

- 14 -
Check the output data of TU800 Pin 21~28 Can you see the normal signal?
YES
Could you measure voltage of TU800 & IIC lines? Are they all normal?
You should check power line & IIC lines.
You should replace TUNER.
YES
NO
Check the input and output of HD2.4(IC401). Especially you should check The H,V sync and clock. Can you see the normal waveform?
This board has big problem because Main chip(HD2.4) have some troubles.After checking thoroughly all path once again, You should decide to replace HD2.4 or not.
NO
NO
DTV doesn’t display

- 15 -
Check J603( Pin 7B) , P601 (Pin 1) Can you see the normal waveform?
YES
J603 or SIDE AV may have problem. Replace this Jack or SIDE AV.
After checking the Power of AV switch you should decide to replace AV switch or not.
NO
Check the input(Pin1 or Pin22) of AV switch(IC603). Pin1 is for video1,Pin22 is for video 2. Can you see the normal waveform?
NO
YES YES YES YES
After checking the Power of AV switch you should decide to replace AV switch or not.
Check the output(Pin56) of AV switch(IC603). Can you see the normal waveform?
NO
After checking the Power of Decorder you should decide to replace Decorder or not.
Check the input(Pin148) of Decorder(IC901). Can you see the normal waveform?
NO
After checking the Power of Decorder you should decide to replace Decorder or not.
Check the output signal of Decorder(IC901). Can you see the normal waveform?
NO
This board has big problem because Main chip(HD2.4) have some troubles. After checking thoroughly all path once again, You should decide to replace HD2.4 or not.
Check the input and output of HD2.4(IC401). Especially you should chec The H,V sync and clock. Can you see the normal waveform?
NO
Video doesn’t display

- 16 -
Check J601,J602. Can you see the normal waveform?
YES
J601,J602 may have problem. Replace this Jack.
After checking the Power of component switch, you should decide to replace component switch or not.
NO
Check the input of Component switch(IC707) , Can you see the normal waveform?
NO
YES YES YES YES
After checking the Power of component switch you should decide to replace component switch or not.
Check the output of Component switch(IC707) , Can you see the normal waveform?
NO
After checking the Power of MST3361 you should decide to replace MST3361 or not.
Check the input of MST3361(IC703 Pin41,44,46). Can you see the normal waveform?
NO
After checking the Power of MST3361 you should decide to replace MST3361 or not.
Check the output of MST3361(IC703 ). Can you see the normal waveform?
NO
This board has big problem because Main chip(HD2.4) have some troubles. After checking thoroughly all path once again, You should decide to replace HD2.4 or not.
Check the input and output of HD2.4(IC401). Especially you should check The H,V sync and clock. Can you see the normal waveform?
NO
Component doesn’t display

- 17 -
Check J600 , Can you see the normal waveform?
YES
J600 may have problem. Replace this Jack.
After checking the Power of component switch, you should decide to replace component switch or not.
NO
Check the input of Component switch(IC707) , Can you see the normal waveform?
NO
YES YES YES YES
After checking the Power of component switch you should decide to replace component switch or not.
Check the output of Component switch(IC707) , Can you see the normal waveform?
NO
After checking the Power of MST3361 you should decide to replace MST3361 or not.
Check the input of MST3361(IC703 Pin41,44,46). Can you see the normal waveform?
NO
After checking the Power of MST3361 you should decide to replace MST3361 or not.
Check the output of MST3361(IC703 ). Can you see the normal waveform?
NO
This board has big problem because Main chip(HD2.4) have some troubles. After checking thoroughly all path once again, You should decide to replace HD2.4 or not.
Check the input and output of HD2.4(IC401). Especially you should check The H,V sync and clock. Can you see the normal waveform?
NO
RGB_PC doesn’t display

- 18 -
Check input connect J700 , J701 Can you see the normal waveform?
YES
J700 , J701 may have problem. Replace this Jack.
After checking the Power of this chip, you should decide to replace this or not.
NO
Check DDC communication lines(IC705 IC706 Pin5,6)
NO
YES YES YES YES
After checking the Power of this chip, you should decide to replace this or not.
Check HDCP communication lines(IC704 Pin5,6) NO
After checking the trace of TMDS lines and power of MST3361, you should decide to replace MST3361 or not.
Check the input of MST3361(IC703) This signal is TMDS. Can you see the normal waveform?
NO
After checking the Power of MST3361 you should decide to replace MST3361 or not.
Check the output of MST3361(IC703 ). Can you see the normal waveform?
NO
This board has big problem because Main chip(HD2.4) have some troubles. After checking thoroughly all path once again, You should decide to replace HD2.4 or not.
Check the input and output of HD2.4(IC401). Especially you should check The H,V sync and clock. Can you see the normal waveform?
NO
HDMI doesn’t display

BLOCK DIAGRAM
- 19 -
HD2_DAC_LRCLK
HD2_ICE958_IN
HD2_DAC_SCLK
HY57V161610
SIF MSP
4450
PAL Tuner
(TAUM-W101P)
COFDM DEM.+
DVB Tuner
(TDFB- Z205P)
CVBS
Y,C
IIC4
IIC1
99
Data[ 0:7],VH_TP_CLK
VALID
EEPROM
(AT24C512
)
IIC2
SDRAM (4EA)
(HY57V641620B)
SDRAM (4EA)
(HY57V641620B)
Side AV V,LR
3
Side AV V,LR
33
Rear AV V,LR
3
Rear AV V,LR
33
Rear S YC
2
Rear S YC
22
MNT_Out V
1V 11
MSP445
0
Ext A LR
22
TP/ D1
99
YCbCr
H,V,CLK
FID
30
YCbCr
2020
H,V,CLK
33
Y/ U/ V
IIC3 Reset
1010
TP[ 0:7],
TP_CLK,
TP_valid
CPU ARM
(S3C44
B0X)
X-tal
(10M)
I2C Hub
(PCA9516)
IIC1 IIC2 IIC3 IIC4 IIC1 IIC2 IIC3 IIC4 IIC1 IIC2 IIC3 IIC4
KIA7029
74HC14D
Reset
SDRAM (2EA)
(HY57V641620B)
SDRAM (2EA)
(HY57V641620B)
FLASH (2EA)
(AT49BV160)
FLASH (2EA)
(AT49BV160)
A/ V SW
(CXA2069Q
)
V1 SUB
(V/YOUT2)
VOUT3
OUT1
Y1/ C1
IN3
HD- 2.4
-TP De-Mux -MPEGDecoding: MP@HL -Format Co nverter -Host I/ F, Memory I/ F -Digital I/F -Video DAC, NTSC Encoder -AC-3 Decoder/SPDIF In/ out -IEP2
SPDIF
Out
SPDIF
In
SPDI
FOut
SDRAM I/ F
Text
Decoder
(SDA6001)
EPLD1
(XC95144XL
)
Control GPIO
Peripheral Bus
SPIDIF_IN_BYPASS
88
2
RX[ 0:2]–,RXC –
DDC(I2C)
EEPROM
(AT24C02N)
33
YCbCr
Vid eo SW
(CXA2181Q
)
RGB-DTV/-PC 5RGBHV
Comp_1 YCbCr
33
Comp_2 YCbCr
33
EPLD1
(XC95144XL)
DVI_H,V,DE
FID
33
OR
3
IIC3
SIF
PAL
Tuner Ext AL/ R
22
CXA2069
Comp_1 22 L/ R
Comp_2
22 L/ R
Sound
Proc
(MSP4450) I2S Out
33 HD-II
HD-II
I2S_In
MNT_Out L/ R
22
RGB(Phone)22 L/ R
Audio ADC
(CS5331)
PWM
MODULATOR
(NSP2100A
)
I2S
PWM AMP
(TAS5122)
PWM AMP
(TAS5122))
OR1 OR2 OR3
3
OR
4
VCXO
27Mhz LGDPLL
(LGDT1901B)
HD2_VDPClk , HD2_NT2CLK
RS-232C
(ST3232)
OR4
HD-II
DVBPAL
RF
SPLITTER
HV,DE
RGB
30
3
DOutClk
LVDS Tx.
(THC63LVD103)
TX[ 0:4]–
TXC–
12
LVDS
WAFER
EEPROM
(AT24C02N
)
Buffer
(MC33078)
CLK
11
OR
1
YCbCr
3030
HDMI RX
& ADC
(MST3362M)
10-bit
HDMI-Stereo
1A + 1D Video A/ D
HY57V161610
EEPROM
(CAT24WC)
uCom
(MTV416M)
V4
Through
out
MAIN
(V/YOUT1)
SPDIF Rx.
(CS8415)
RX_HDMI_SPDIF
IIC1
X_tal
24Mhz
2
DDC(I2C) 2
H/V
X-tal
(24.576M)
1
TXT_CVBS
2
IIC2
TXT R/ G/ B,
FB/ H/V
6
1
1
1
3
Periphera
l
(FMS6403
)
33
YCbCr
Y/ U/ V
3
H/V
22
H,V,CLK
OR2
3
IIC4
FID
IIC2
1FID OR3
HD2_ICE958_OUT
1
IIC4
IIC2
IIC2
2
HD2_SYSCLK
1
EPLD1
(XC95288XL)2HD2_SYSCLK , EPLD_CLK
IIC3
IIC4
1
2
L/ R
SCK / LRCK / LRCH
3
SCK / LRCK / LRCH
4
SCK / LRCK /
LRCH / MSCK
1MCLK
2
BSS83
Video
Decoder
(uPD64015)
3D Y/C Separator

MEMO
- 20 -