LCD PROJECTION TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : NB-03JA
MODEL : RU-48SZ40
CANADA : http//biz.lgservice.com
USA : http//www.lgservice.com
: http//lgservice.com/techsup.html
CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
SERVICING PRECAUTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
ELECTROSTATICALLY SENSITIVE (ES) DEVICES . . . . . . . . . . . . . . . . . . . . . . . . 4
DESCRIPTION OF CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SPECIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
ADJUSTMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
REPLACING THE LAMP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
BLOCK DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
EXPLODED VIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
REPLACEMENT PARTS LIST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PRITED CIRCUIT BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
- 2 -
- 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 X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An lsolation 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 circuitary that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this monitor 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.
Due to high vacuum and large surface area of picture tube,
extreme care should be used in handling the Picture Tube.
Do not lift the Picture tube by it's Neck.
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 positioin, 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 esposed 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 sepcified, 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
CANADA: LG Electronics Canada, Inc. 550 Matheson
Boulevard East Mississauga, Ontario L4Z 4G3
USA : LG Customer Interactive Center
P.O.Box 240007, 201 James Record Road Huntsville,
AL 35824
Digital TV Hotline 1-800-243-0000
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
SERVICING PRECAUTIONS
- 4 -
CAUTION: Before servicing instruments covered by this service manual and
its supplements, read and follow the SAFETY PRECAUTIONS section of this
manual. Note: If unforeseen circumstances create conflict between the follow-
ing servicing precautions and any of the safety precautions, always follow the
safety precautions. Remember: Safety First.
General Servicing Precautions
1. a. Always unplug the instrument AC power cord from the AC power source
before: (1) removing or reinstalling any component, circuit board, module,
or any other instrument assembly. (2) disconnecting or reconnecting any
instrument electrical plug or other electrical connections. (3) connecting a
test substitute in parallel with an electrolytic capacitor in the instrument.
Caution: A wrong part substitution or incorrect polar-ity installation of
electrolytic capacitors may result in an explosion hazard.
b. Do not defeat any plug/socket B+ voltage interlocks with which instru-
ments covered by this service manual might be equipped.
c. 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.
d. Always connect a test instrument’s ground lead to the instrument chassis
ground before connecting the test instrument positive lead.
Always remove the test instrument ground lead last.
Note: Refer to the Safety Precautions section of this manual.
2. The service precautions are indicated or printed on the cabinet, chassis, or
components. When servicing, follow the printed or indicated service precau-
tions and service materials.
3. The components used in the unit have a specified flame resistance and
dielectric strength. When replacing any components, use components
which have the same ratings. Components identified by shading, by *, or
by in the circuit diagram are important for safety or for the characteristics
of the unit. Always replace with the exact replacement components.
4. An insulation tube or tape is sometimes used and some components are
raised above the printed wiring board for safety. The internal wiring is some-
times clamped to prevent contact with heating components. Install them as
they were.
5. After servicing, always check that the removed screws, components, and
wiring have been installed correctly and that the portion around the service
part have not been damaged. Further, check the insulation between the
blades of the attachment plug and accessible conductive parts.
INSULATION CHECKING PROCEDURE
Disconnect the attachment plug from the AC outlet and turn the power on.
Connect the insulation resistance meter (500 V) to the blades of the attach-
ment plug. The insulation resistance between each blade of the attachment
plug and accessible conductive parts (Note 1) should be more than 1 Mohm.
Note: Accessible conductive parts include metal panels, input terminals, ear-
phone jacks, etc.
ELECTROSTATICALLY SENSITIVE (ES) DEVICES
Some semiconductor (solid-state) devices can be damaged eas-
ily by static electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES
devices are integrated circuits and some field-effect transistors
and semiconductor “chip” components. The following techniques
should be used to help reduce the incidence of component dam-
age caused by static electricity.
1. Immediately before handling any semiconductor component
or semiconductor-equipped assembly, drain off any electrosta-
tic charge on the body by touching a known earth ground.
Alternatively, obtain and wear a commercially available dis-
charging wrist strap device, which should be removed for
potential shock reasons prior to applying power to the unit
under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or expo-
sure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder
ES devices.
4. Use only an anti-static 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 charge 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
t.(Most replacement ES devices are packaged with leads elec-
trically shorted together by conductive foam, aluminum foil, or
comparable conductive material.)
7. Immediately before removing the protective material from the
leads of a replacement ES device, touch the protective materi-
al to the chassis or circuit assembly into which the device will
be installed.
Caution: Be sure no power is applied to the chassis or circuit,
and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replace
ment ES devices. (Otherwise, seemingly harmless motion,
such as the brushing together of your clothing or the lifting of
your foot from a carpeted floor, can generate static electricity
sufficient to damage an ES device.)
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DESCRIPTION OF CONTROLS
Function Status Indicators
Lamp indicator, operation indicator, and temperature indicator located below the front panel
controls, reveal the operating status of the LCD projection TV.
Operation Indicator
Lamp Indicator
Temperature Indicator
Off TV is not connected to power outlet.
Red Power Cord is connected, TV is in standby mode.
Green On
Orange (flashing) Preparing operation in standby mode.
Orange Projection lamp is reaching the end of its life and needs to
be replaced with a new lamp.
Red (flashing) There is a problem with the lamp or around it. Contact an
authorized service center.
Green (flashing) The lamp cover is not closed.
Orange The projection TV is overheating.
Red The projection TV shut down due to overheating.
Red (flashing) The projection TV shut down, check the cooling fan.
Operation Indicator
Lamp Indicator
Temperature Indicator
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On-Screen Displays
This page describes your on-screen display and information banner options.
10 AM 03:00
TV 13
MONO
TV 6
Main Channel Display
Displays current channel number.
Channel Label
If a channel label has been
set, then it will appear here.
PIP Display
This display
appears when
PIP is active.
Volume
Volume level is displayed while
adjusting the sound.
Mute
Appears
when sound
is muted.
Time
Appears if the
Enter button is
pressed on
remote control.
ABC
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Front Panel Controls
POWER
MENU ENTER VOL CH
127
34568
Operation indicator.
Lamp indicator.
Temperature indicator.
POWER
MENU
ENTER (Same as ENTER button on your
remote control)
VOLUME UP / DOWN
CHANNEL UP / DOWN
1
2
3
4
5
6
7
8
See menu pages for instructions on using the on-
screen menus.
The POWER, CHANNEL, TV/VIDEO, and VOLUME
buttons work just as they do on your remote control.
- 8 -
Remote Control Functions in TV Mode
LIGHT
TV/VIDEO
MODE
FRONT
MUTE SURF
VOL CH
RATIO
CC AVL
SLEEP
MENU
VIDEO AUDIO
EXIT
PLAY PAUSE STOP RECORD
PIP PIP ch- PIP ch+ PIPinput
FREEZE
ENTER
SAP SWAP
REW FF SKIP
COMP/DVI
FLASHBKENTER
POWER
SURF
Scrolls the Surf channel list.
MENU
Brings up the main
menu to the screen. EXIT
Clears all on-screen dis-
plays and returns to TV
viewing from any menu.
MUTE
Switches the sound on or off
THUMBSTICK
Allows you to navigate the on-screen
menus and to adjust the system settings
and preferences, by moving to an option
with
F G
and selecting the highlighted
option with .
TV/VIDEO
Selects: Analog, Video1,
Video2, Front video,
Component1-2, RGB, and DVI
input sources.
LIGHT
Illuminates the remote control
keys.
FRONT
Selects the front video signal if
a device, such as a camcorder
or game player, is connected
to the front video input jack.
COMP/DVI
Selects: Component1-2,
RGB, and DVI input
sources.
PIP
Toggles between PIP, POP
(Picture-out-of-Picture) and
Twin picture mode.
FREEZE
Captures and freezes the
currently-viewed main pic-
ture in PIP mode.
SLEEP
Selects the amount of time
before your TV turns itself
off automatically.
MODE
Selects the remote operating mode: TV,
VCR, DVD, Cable, HDSTB, or Audio.
Select other operating modes, for the
remote to control external devices.
D
E
SWAP
Switches the picture from
PIP, POP, or twin picture to
the main screen.
PIP INPUT
Selects the input source
for the sub picture.
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Remote Control Functions in TV Mode
LIGHT
TV/VIDEO
MODE
FRONT
MUTE SURF
VOL CH
RATIO
CC AVL
SLEEP
MENU
VIDEO AUDIO
EXIT
PLAY PAUSE STOP RECORD
PIP PIP ch- PIP ch+ PIPinput
FREEZE
ENTER
SAP SWAP
REW FF SKIP
COMP/DVI
FLASHBKENTER
POWER
POWER
Turns your TV or any other pro-
grammed equipment on or off,
depending on mode.
CHANNEL UP/DOWN
Scrolls through available chan-
nels in EZ Scan memory.
NUMBER KEYPAD
For direct channel selection and
programming functions.
AVL
To keep an equal volume level of each
channel.
AUDIO
Selects the sound appropriate for the
program's character.
RECORD, PAUSE, REW,
FFWD, PLAY, STOP
Control the functions on your VCR.
VOLUME UP/DOWN
Increases/decreases the sound
level.
RATIO
Changes the screen format or
aspect ratio.
SKIP
Playing CDs: Selects songs.
Playing DVDs: Selects movie chapters.
ENTER
When in the menu system and
other on-screen displays,
selects highlighted options.
FLASHBK
Tunes to the last channel
viewed.
CC
Selects a closed caption mode
for displaying captioning infor-
mation if available on program.
VIDEO
Adjusts the factory preset picture
according to the room.
PIPCH+
Changes to next higher PIP channel.
PIPCH-
Changes to next lower PIP channel
SAP
Selects: Mono, Stereo, and
SAP.
- 10 -
Mini glossary
JACK A connection on the back of a TV, VCR, or any other A/V device. This includes the RF jack and the Audio/Video jacks that are
color-coded.
SIGNAL Picture and sound traveling through cable, or over the air, to your television screen.
Rear Connections Panel
C
A
L
I
B
R
A
T
I
O
N
PC/DTV
(XGA/
480p/
720p/
1080i)
AUDIO
CENTER
MODE IN
VARIABLE
AUDIO OUT
PR
DVI INPUT
DTV/DVD INPUT
COMPONENT
INPUT2 INPUT1
PB
Y
PC/DTV
(XGA/
480p/
720p/
1080i)
RGB INPUT
RGB/DVI INPUT
(R)
(L)
AUDIO
(R)
(L)
AUDIO
(R)
(L)
AUDIO
MONITOR
OUT VIDEO
INPUT 2 VIDEO
INPUT 1
S-VIDEO
(R)
(L)
AUDIO
VIDEO
MONO
+75 Ω
ANT IN
EXTERNAL SPEAKER(8Ω)
(-)R(+) (-)L(+)
S-VIDEO In
A connection available with
some high-end equipment
that provides even better
picture quality for Video 2.
Variable Audio Out
Used to connect
either an external
amplifier, or add a
sub-woofer to your
surround sound sys-
tem.
RF Connector: Antenna
Used to connect analog
cable or antenna signals
to the television, either
directly or through your
cable box.
Video 1 or 2
Connects the video sig-
nals from various types
of equipment.
Y, Pb, Pr
DVD Component Video and HD Component
Video
Some top-of-the-line DVD players use what
is called “component video,” for extremely
accurate picture reproduction. Refer to your
DVD manual for further information.
Connecting cables and external equipment to your TV.
Monitor Out
Connects to a second TV
or Monitor.
Left/Right Audio
Used for stereo sound
from various types of
equipment.
PC and HD-STB Inputs
Used to connect from a
PC source or HD-STB
Satellite system.
PC and HD-STB Audio
Input
Used for audio connec-
tions from a PC source or
HD-STB Satellite system.
Audio Center Mode In
Connect to external
Dolby Digital Center
“preamp output.”
EXTERNAL SPEAKER
(8 ohm output)
Connect to the external
speaker(s). For further
information, refer to
Speaker manual.
- 11 -
Front Connection Panel
Front A/V Panel
S-VIDEO
VIDEO
FRONT A/V
AUDIO
(R)
(L)/
MONO
There are four jacks on the right front side behind the screen on
your projection TV that make connecting Audio/Video devices
like video games and camcorders very simple.
The jacks are like those found on the back jack connection
panel. This means that most equipment that connects to those
types of jacks on the rear jackpack, may be connected to the
front connection panel.
To use the front jacks as the signal source, select them using
Main Input menu as described on page 25. They will be named
“Front Video” in the Main Input menu.
Left/Right Audio
Used for stereo
sound from various
types of equipment.
Video
Connects the video
signals from any
piece of equipment.
S-Video
A connection available on
some very high-end equip-
ment that provides better
picture quality than video
input.
If you select either Front Video or
Front S-Video, the Front audio
inputs are automatically selected
as well.
If you’re connecting a video game
device, make sure to change the
picture settings with the EZ
Picture option in the Video menu.
Mini glossary
A/V CABLESAudio/Video cables. Three cable connector—Right audio (red), Left audio (white), and Video (yellow). A/V cables are used
for stereo playback of videocassettes and for higher quality picture and sound from other A/V devices.
A/V DEVICE Any device that produces video or sound (VCR, DVD, cable box, or television).
- 12 -
SPECIFICATION
Product Specifications
Models RU-48SZ40
Horizontal Size (Inches) 45.5
Height (Inches) 32.9
Depth (Inches) 15.3
Weight (lbs.) 68.3
Power Requirement AC 120V, 60Hz
Television System American TV Standard, NTSC, ATSC with STB
Television Channels VHF: 2 - 13
UHF: 14 - 69
CATV: 1 - 125
Power Consumption (W) 270W
Antenna 75 ohm External Terminal for VHF/UHF
Audio Output (W) 15W x 2
Supplied Accessories Remote control, 2 size AA batteries.
External Input/Output Ports Audio/Video inputs (3 sets)
Audio/Video output (1 set)
S-Video inputs (2)
Component inputs (2 sets)
RGB input (1)
DVI input (1)
RGB/DVI audio input (1 set)
Variable audio output (1 set)
Audio center mode input (1)
Calibration port (1)
External Speaker output (1 set)
Design and specifications are subject to change without prior notice.
1. Application Object
This instruction is for the application to the LCD projection TV.
2. Notes
(1) The power source insulation of this LCD Projection TV is
not charging type and you may not use the transformer for
insulation. But you better adjust the set after operating it
with insulation transformer between power supply cable and
input part of the set for protecting the adjusting equipment.
(2) The adjustment must be performed under the correct
sequence.
(3) The adjustment 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 must keep 120V, 60Hz in
adjusting.
(5) The set must be operated for 15 minuets preliminarily
before adjustment if there is no specific designation.
The preliminary operation must be performed after receiv-
ing 100% white pattern, but reception of the moving pic-
ture may also be possible in unavoidable case.
3. Compomation of Adjustment Mode
(1) All adjustment mode are entered by pressing the IN-
START key on the remote control, after adjustment press
the IN-START key to come out.
(2) Compomation of adjustment mode: The first screen com-
position of pressing IN-START key.
(fig. 1) The first screen of adjustment mode
(3) Select menu to adjust(turn to yellow) with using (CH+(D),
CH-(E)) key above screen and press the enter key to
adjust on the wanting menu.
(4) After being inputed for SUB menu, select the SUB menu
with using (CH+(D),CH-(E)) key and adjust the value of
adjustment with using the volume +(F),volume - (G) key.
(5) Press the IN-START key to come out after adjustment,
when (fig.1) is appeared, press again to come out the final
adjustment mode.
(6) SUB menu composition of each adjustment mode
1) Adjust Mode : Sub adjustment menu selected by IN-
START key.
RGB alignment is selected in this case.
2) Step123 : Step selection when changing data.
ex) Step123:1 --> Change one by one when changing
data with Volume key
Step123:10 --> Change ten by ten when changing data
with Volume key
You can select 1 by press number key ‘1’, 10 by press
‘12’, 100 by press ‘123’. And you can change data by
1, 10, 100.
3) 10. H_position 315/315/315 : Actual adjusting menu.
4) Micom : V0.50 : Main Micom Version display of Digital
board.
5) SubMicom : V01.31 : Micom Version display of Tuner
board.
6) LCDMicom : V01.31 : Micom Version display of Drive
board.
7) Lamp : 16 : Lamp time display.
4. LCD Adjustment
4-1. NRS Adjustment
[When the LCD pannel load data on regular pixel using high
speed charge/discharge with sample & holder, the drain
width of TFT gradually decreases and the non-resistance
increases, and comes out regular noise on screen(shows
vertical line by 12 pixel)
This NRS signal is enforced charge/discharge signal so
that the ON/OFF time of TFT mode quickly before starting
active video signal, H/L level adjustment is possible to
each R, G, B.
(1) Required Test Equipments
1) PC Pattern Generator : 16 Step Gray Pattern
2) Fixation Stand
3) Remote Control for Adjustment
4) Circuit thing Jig for Adjustment(Except Driver Board Assy)
(2) Equipment Composition : Follow Fig. 2
(3) Preparation for Adjustment
1) Connect PC Pattern Generator with adjustment Jig like
Fig. 2. (Except Drive part of a circuit block)
2) Select a PC Pattern Generator, 16 Gray.
(4) Adjustment Sequence
1) Turn on a adjustment Jig.
2) Select a RGB_PC by pressing Input Select button on
Remote Control.
3) Enter to adjustment mode by pressing IN-START button on
Remote Control.
EZ ADJUST V*.**
1. VPX3226 Main
2. VPX3226 Sub
3. RGB Alignment
4. 62352
5. Gamma Adjust
6. Uniformity Adj
7. AD9883 Adjust
8. MPX Level Adjust
9. SD-RAM CLK
10. Lamp Replace
Adjust Mode : RGB Alignment Step 123:1
Micom:V0.50 SubMicom:V01.31 LCDMicom:V01.31 Lamp:16
- 13 -
ADJUSTMENT INSTRUCTIONS
10. H_Position 315/315/315
4) Select 4. 62352, then ready to adjust 6. RNRSH, 9.
GNRSH and 11. BNRSH.
5) Let’s decrease vertical line Noise by using Volume button.
(Input a R, G, B input signal, then adjust it individually)
6) When finishing the adjustment, get out of adjustment mode
by pressing IN-START button.
4-2. VCOM Adjustment
(1) Required Test Equipments
1) PC PATTERN GENERATOR : Pattern Generator which
can generate each R,G,B signal and can observe the
FLICKER best(ex: me Character Pattern).
2) (Fig. 2) Equipment compositon
3) Remote Control
4) Circuit thing Jig for Adjustment(Except Driver Board Assy
of adjustment model)
(2) Equipment Composition
(3) Preparation for Adjustment
1) Connect the PC Pattern Generator with circuit thing for
adjustment(circuit block except driver part) and adjustment
Jig. shown upper Fig. 2.
2) Set the PC Pattern generator with displayable
format(DTV720p, SVGA 60Hz, XGA 60Hz) and turn on it.
(4) Adjustment Sequence
1) Turn on the adjustment Jig.
2) Select a RGB_PC by pressing Input Select Key on
Remote Control.
3) Enter to adjustment mode by pressing IN-START button on
Remote Control.
4) Select 4. 62352, then ready to adjust 4. 62352 RVCOM, 7.
62352 GVCOM and 10. 62352 BVCOM.
5) Let’s decrease flicker by using Volume button.
(Input a R, G, B input signal, then adjust it individually)
6) When finishing the adjustment, get out of adjustment mode
by pressing IN-START button on Remote Control.
5. Assembling Adjustment
5-1. Screen Tilt & Keystone Adjustment
(1) Required Test Equipments
1) Six angles wrench and spanner for knob adjustment or fix-
ation
2) XGA output PC
3) Remote Control
(2) Preparation for Adjustment
1) Do not assemble the front pannel equipment so that you
can adjust the adjustment knob(Fig. 3).
2) Turn the TV ON and select input mode to RGB_PC.
3) Connect XGA output terminal to PC input of TV.
4) Select window screen.
(3) Adjustment Sequence
1) Stick the Engine(Fig. 3) to the knob poll for adjustment and
check the key stone & tilt watching TV screen.
2) Rotate left/right adjustment knob below and adjust engine
angle.
3) Adjustment adjustment knob of both sides so that the tilt
and keystone are to be under the spec. (The gap between
max and min : under 4mm)
4) After adjusting like 3), fix the engine with screw for fixation
(2EA. adjustment knob and engine fixing screw)
5-2. Screen Position Adjustment
(1) Required Test Equipment
A remote control for adjustment
(2) Preparation for Adjustment
1) Connect a power source with TV Set and turn TV Set on.
2) Do heat run for 15 min and over before adjustment.
3) Receive the main/sub signal of company through 13CH by
split screen.
(3) Horizontal Position Adjustment
1) Press In-START key on the remote control to enter the
adjustment mode.
2) Select 3. RGB Alignment.
- 14 -
SCREEN
Equipment to measure
Optics Adjustment Jig
SET
Stand
PC Pattern
Generator
Circuit thing
for Adjustment
PC
(Fig. 2-1) Using Adjustment of Circuit thing for Adjustment
(Fig. 2-2) TV Set status Adjustment
Adjustment Connecctor
Adj.
Jig
Equipment to measure
Optics
(Fig. 3)
3) Select 10. H_position with channel key in adjust mode.
4) Adjust data with using the left/right key on the remote con-
trol in order to be left/right semmetry screen. (Three blocks
of the most outer block must be located the most outer
block.)
(4) Adjustment for Vertical Position
1) Select 16. V_position with channel key in adjust mode.
2) Change the data to symmetrized upper and down of
screen(refer to Fig. 4) and then press the IN-START but-
ton on Remote Control to get out of adjustment mode.
5-3. Component2 Offset Adjustment
(1) Required Test Equipment
A remote control for adjustment, 801GF
(2) Preparation for Adjustment
1) Connect a power source with TV Set and turn TV Set on.
2) Do heat run for 15 min and over before adjustment.
3) Receive the Component2.
4) Receive the 720P and HozTVBar Pattern of 801GF.
(3) Offset Adjustment
1) Press IN-START key on the Remote Control to enter the
adjustment mode after more than 10 seconds of receiving
the signals.
2) Press 7. AD9883 adjust to adjust .
3) When the AD9883 Gain Adjust is appeared after AD9883
Offset Adjust, the adjustment is completed.
5-4. Adjustment of White Balance and Gamma
(1) Required Test Equipments
1) Illuminometer (name of model : CA-100) 1EA —>
Measure color of projecting screen center
[CA-110(name of model) is possible to measure White
Balance and Gamma —- leave it 20Cm from screen
center
Follow a measurement machine manual to set CA-100
and CA-110 measurement machine.
2) Pattern Generator 1EA —> 16 step Gray Pattern, 64 step
Gray Pattern
3) Set Fixation Stand 1EA
4) Remote Control 1EA
5) Circuit thing Jig for adjustment(Except Drive Board Assy of
adjustment model)
--- Programmed Digital Board so that the VDP Test Pattern
can output white signal by 1 level form 0 to 255 level.
(2) A equipment composition
Adjust at the same condition of equipment composition diagram.
(3) Preparation for Adjustment
Compose the equipment follow Fig. 2 and place the set on
the fixation stand.
1) Select the VDP Test Pattern signal to R1, G1, B1.
2) Press the IN-START key to select 4. 62352 and then select
5. RVREF, 8. GVREF, 12. BVREF in adjust mode.
3) Adjust the luminance of CA100 below 0.75Cd. (The adjust-
ment range is 196~202)
4) Exit adjustment mode by pressing IN-START button on
Remote Control.
5) Press the IN-START key on R/C and select 3. 7050 RGB
Set.
6) Check the data 1. RContrast, 8. GContrast, 15. BContrast
is 515. Otherwise set the data 515 by using volume button.
(4) Adjustment Sequence
1) Output the 255,255,255 signal of VDP Test Pattern, then
display the maximum white pattern on screen.
2) Gamma Adjust Mode is display as below when select 5.
Gamma adjust by selecting IN-START key on R/C.
3) Change the 16 Step RGB Data to select white balance
x=283, y=297(D9300K).
4) Measure the luminace with changed data.
5) Set the every Gamma data of 16 step to 2.2 on the basis
of measured luminance data in 3).
(Max luminance *(n1/16)**2.2) — Max luminance : mea-
sured luminance data n1 = every step unit when separat-
ing signal level to 16 step)
6) Output the 240, 240, 240(15th data in max white output
signal level) in the VDP Test Pattern, change the 15th
RGB Data value to come out white balance x=283,
y=297(D9300K) and measured step luminance in 5).
7) Output the 224, 224, 224(14th data in max white output
signal level) in the VDP Test Pattern, change the 14th
RGB Data value to come out white balance x=283,
y=297(D9300K) and measured step luminance in 5).
- 15 -
US13CH
(Fig. 4) Adjustment for Horizontal/Vertical Position on Screen
HozTVBar Pattern
Gamma Adjust Mode
1
2
3
16
80
234
453
724
100
216
411
740
RGB 456 Step123
100
216
387
780
* 1st Column : 16 Step Level
* 2nd Column : R Adjustment
Data
* 3rd Column : G Adjustment
Data
* 4th Column : B Adjustment
Data
8) As shown above, output the VDP Test Pattern sig-
nal(208/192/176/160/144/128/112/96/80/64/48/32/16) and
change the RGB Data value of each step to come out
white balance x=283, y=297(D9300K) and measured
lumincance in 3).
(5) Gamma adjustment manually
This is adjustment(after finish the 3-4) to check whether
Gamma/White Balance adjustment are well adjusted and
make correction manually.
1) Prepare the PC Pattern Generator which is possible to out-
put R/G/B of 16 step and 64 step Gray Pattern.
2) Equipment composition : Follow Fig. 2.
3) Turn on the Jig for adjustment.
4) Select the RGB_PC by pressing the input select button on
Remote Control.
5) Output the 16 Gray Pattern in PC Pattern Generator.
Check it with the naked eye whether Screen Gamma and
W/B is right about each Gray.
If it’s not, press the IN-START button on Remote Control
and then adjust the level data of each step manually in
sub menu of 5. Gamma adjust.
6) Output the 64 Gray Pattern in PC Pattern Generator.
Check it with the naked eye whether Screen Gamma and
W/B is right about each Gray or whether there is Gamma
noise.
If there’s any problem, adjust in 5).
7) After finishing adjustment, exit adjustment mode by using
IN-START button on Remote Control.
5-5. White Uniformity Adjustment
(1) Required Test Equipments
1) Uniformity measurement equipment : Equipment which can
measure chromaticity in the whole screen
2) Set Stand 1EA
3) Remote Control for Adjustment
4) Circuit thing Jig for Adjustment(Except Driver Board Assy
of adjustment model)
--- Programmed Digital Board so that the VDP Test Pattern
can output white signal by 1 level form 0 to 255 level.
(2) A equipment composition
Compose the equipment follow Fig. 2 and place the set on
the fixation stand.
(3) Preparation for Adjustment
1) Composite the equipment as shown Fig 2, and place the
set on fixation stand.
2) After inputting company channel 13, adjust color uniformity
like Horizontal/Vertical position adjustment of input signal
part adjustment by using Remote Control for adjustment.
3) After pressing IN-START key on Remote Control for adjust-
ment, select the adjustment mode 6. Uniformity adj.
Refer to register value and correct register value if need.
<Resister Explanation about uniformity adjustment>
1. RamCtrl : s/w saving uniformity write order(Do not adjust)
2. CSHP : Horizontal start point designation ---adjustable
3. CSVP : Vertical start point designation ---adjustable
4. CEHP : Horizontal END point designation ---adjustable
5. CEVP : Vertical END point designation ---adjustable
6. Mode : uniformity mode select --- adjustable if need
*** 0 : 221point & 3level ---- defalut value
*** 1 : 221point & 4level
*** 2 : 825point & 3level
*** 3 : 825point & 4level
7. KHH : Upper 2byte of horizontal line correction coefficient -
- Change according to CSHP, CEHP value.
8. KHL : Upper 2byte of vertical line correction coefficient --
Change according to CSHP, CEHP value.
** How to calculate KHH, KHL value
LCD panel size = 1280 x 720
Correction Point = 221 point
--> 17 horizontal points x 13 vertical points
(16 horizontal segments x 12 vertical poins)
OH Coefficient(KHH, KHL)
--> Calculation method (CEHP-CSHP=1280, Horizontal
segment value =16)
9. KVH : Upper 2byte of vertical line correction coefficient --
Change according to CSVP, CEVP value.
10. KVL : Upper 2byte of vertical line correction coefficient --
Change according to CSVP, CEVP value.
OV Coefficient(KVH, KVL)
--> Calculation method (CEVP-CSVP=720, Vertical seg-
ment value =12)
11. RL1H : Upper 9bit of MID2 brightness correction coeffi-
cient in R MIN.
--- Change according to RMIN and RMID2 value.
12. RL1L : Lower 9bit of MID2 brightness correction coeffi-
cient in R MIN.
--- Change according to RMIN and RMID2 value.
13. RL2H : Upper 9bit of MID1 brightness correction coeffi-
cient in R MID2.
--- Change according to RMID2 and RMID1 value.
14. RL2L : Lower 9bit of MID1 brightness correction coeffi-
cient in R MID2.
--- Change according to RMID2 and RMID1 value.
15. RL3H : Upper 9bit of MAX brightness correction coeffi-
cient in R MID1.
--- Change according to RMID1 and RMAX value.
(use it while adjusting 4 coefficient)
16. RL3L : Lower 9bit of MAX brightness correction coeffi-
cient in R MID1.
--- Change according to RMID1 and RMAX value.
(use it while adjusting 4 coefficient)
- 16 -
H coefficient = 1/(number of pixel intervals between setting in the horizontal
direction)
Hcoeff = 1/((1280/16)-1) = 0.012658227
hex(0.012658227 x 216) = 0 x 033D, Hcoeff(hex) = 0 x 033D + 1 = 0 X 33E
V coefficient = 1/(number of pixel intervals between setting in the horizontal
direction)
Vcoeff = 1/((720/12)-1) = 0.016949152
hex(0.016949152 x 216) = 0 x 0456, Vcoeff(hex) = 0 x 0456 + 1 = 0 X 0457
<L Coefficient Calculation Method>
Using 3coefficient Level
Assume that the value of R/G/B MIN, MID2,MID1 is 192, 448,
704.
R/G/B MIN = 192
R/G/B MID2 = 448
R/G/B MID1 = 704
OL Coefficient(RL1H~BL3L)
--> Calculation method (L1)
- calcuate L2, L3 same with L1
17. GL1H : Upper 9bit of MID2 brightness correction coeffi-
cient in G MIN.
--- Change according to GMIN and GMID2 value.
18. GL1L : Lower 9bit of MID2 brightness correction coeffi-
cient in G MIN.
--- Change according to GMIN and GMID2 value.
19. GL2H : Upper 9bit of MID1 brightness correction coeffi-
cient in G MID2.
--- Change according to GMID2 and GMID1 value.
20. GL2L : Lower 9bit of MID1 brightness correction coeffi-
cient in G MID2.
--- Change according to GMID2 and GMID1 value.
21. GL3H : Upper 9bit of MAX brightness correction coeffi-
cient in G MID1.
--- Change according to GMID1 and GMAX value.
(use it while adjusting 4 coefficient)
22. GL3L : Lower 9bit of MAX brightness correction coeffi-
cient in G MID1.
--- Change according to GMID1 and GMAX value.
(use it while adjusting 4 coefficient)
23. BL1H : Upper 9bit of MID2 brightness correction coeffi-
cient in B MIN.
--- Change according to BMIN and BMID2 value.
24. BL1L : Lower 9bit of MID2 brightness correction coeffi-
cient in B MIN.
--- Change according to BMIN and BMID2 value.
25. BL2H : Upper 9bit of MID1 brightness correction coeffi-
cient in B MID2.
--- Change according to BMID2 and BMID1 value.
26. BL2L : Lower 9bit of MID1 brightness correction coeffi-
cient in B MID2.
--- Change according to BMID2 and BMID1 value.
27. BL3H : Upper 9bit of MAX brightness correction coeffi-
cient in B MID1.
--- Change according to BMID1 and BMAX value.
(use it while adjusting 4 coefficient)
28. BL3L : Lower 9bit of MAX brightness correction coefficient
in B MID1.
--- Change according to BMID1 and BMAX value.
(use it while adjusting 4 coefficient)
29. RLMIN : Setting up the MINIUM Level of R --- Set under
200
30. RLMID2 : Setting up the MIDDLE 2nd Level of R ---
Middle level when 3coefficient
31. RLMID1 : Setting up the MIDDLE 1st Level of R --- Max
level when 3coefficient
32. RLMAX : Setting up the MAX Level of R
33. GLMIN : Setting up the MINIUM Level of G --- Set under
200
34. GLMID2 : Setting up the MIDDLE 2nd Level of G ---
Middle level when 3coefficient
35. GLMID1 : Setting up the MIDDLE 1st Level of G --- Max
level when 3coefficient
36. GLMAX : Setting up the MAX Level of G
37. BLMIN : Setting up the MINIUM Level of B --- Set under
200
38. BLMID2 : Setting up the MIDDLE 2nd Level of B ---
Middle level when 3coefficient
39. BLMID1 : Setting up the MIDDLE 1st Level of B --- Max
level when 3coefficient
40. BLMAX : Setting up the MAX Level of B
41. HVSCAN : Setting up the scan direction while adjusting
unifomity - Do not adjust
42. TestMode : uniformity adjustment test - Do not adjust
(4) Adjustment Sequence
1) Adjust the screen coordinates as shown below.
2) Output the VDP TEST PATTERN signal correspond to the
Max value.
Read the white coordinates and communicate 3 line with
ET7050 IC through measurement equipment of optics.
Adjust screen coordinates data to adjust the color unifor-
mity of max point.
At this time, make sure that deviation is +5~-5% and stan-
dard is color coordinate of center.
3) Output the VDP TEST PATTERN signal correspond to the
MID value.
Read the white coordinates and communicate 3 line with
ET7050 IC through measurement equipment of optics.
Adjust screen coordinates data to adjust the color unifor-
mity of mid point.
At this time, make sure that deviation is +5~-5% and stan-
dard is color coordinate of center.
4) Output the VDP TEST PATTERN signal correspond to the
MIN value.
Read the white coordinate and communicate with ET7050
IC through measurement equipment of optics.
Adjust screen coordinates data to adjust the color unifor-
mity of miner point.
- 17 -
L1 coefficient = 1 / (brightness level(MID2) - brightness level(MIN)
L1coeff = 1 / (448-192) = 1 / 256 = 0.00390625
L1coeff(hex) = hex(0.00390625 x 218) = 0 x 0400
--> L1H(high 9bit) = b’000000010 L1L(low 9bit) = b’000000000
L2 coefficient = 1 / (brightness level(MID1) - brightness level(MID2)
L3 coefficient = 1 / (brightness level(MAX) - brightness level(MID1)
: case of 4 Brightness Level
0 1 2 3 ............xx..........15 16
1
.
yy
.
11
12
(Fig. 5) Screen divisio diagram for uniformity adjustment
At this time, make sure that deviation is +5~-5% and stan-
dard is color coordinate of center.
5) White the miner, middle, maximum data for each point to
confront to each MICOM address.
5-6. Brightness Adjusment of Main/Sub screen
Operate this adjustment when the brightness of Main/Sub
screen is different.
(1) Receive RF 06Ch. to Main/Sub screen in twin picture.
(2) Let the screen clearly.
(3) Check the “US06CH” with naked eyes in 06Ch. pattern
and if there is difference, adjust like this.
- The field and the letters are distinguished.
(4) Adjusting Main screen
1) Press the “IN Start” key on R/C for adjustment to select
1. VPX3226 main.
2) Adjust to 16. Contrast of adjustment item with +/- key.
(initial value 32)
(5) Adjusting Sub screen
1) Press the “IN Start” key on R/C for adjustment to select
2. VPX3226 sub.
2) Adjust to 16. Contrast of adjustment item with +/- key.
(initial value 32)
* Ask for repairs when the data value is changed over !3.
5-7. Lamp Replace
Use it when the Lamp time is ‘0’.
Press the IN-START key on R/C for adjustment to select
Lamp replace and adjust with volume key.
- 18 -
* Connect your dealer or LG service center for replacing of new lamp.
You must replace the lamp when:
ØThe projector image get darker or start to be deteriorated.
ØThe lamp indicator is red(red, flashing alternately).
ØThe massage “LAMP REPLACE“ appears on the screen when turning the projec-
tor lamp on.
* Replace the lamp as below sequence
1. Turn off the projector and unplug the power cable.
(Cool the lamp for more than 1 hour.)
2. Remove the four retaing screws on the lamp cover with a screwdriver of “+“ type
and then lift off the lamp cover.
3. After lifting the lamp cover off, remove the two retaing screw on lamp case with
screwdriver of “-“ type. (refer to fig.2)
4. Lift up the fixed wire handle of the lamp. (refer to fig.3)
5. Pull out the handle slowly and remove the lamp case.
6. Insert the new lamp gently into the correct position. Make sure it is inserted cor-
rectly.
7. Tighten the screw you removed in step 3.
8. Replace the lamp cover and tighten the cover screws.(Make sure the almp cover
is securely fastend. If lamp cover is open, the lamp indicator flashes green and
the projector is not turn on.)
* Resetting the lamp time
After pressing the “?“ key on the remote control in Stand-By mode, press the “9876“
and press the “OK“ button.
And then three LED in the front is stop after flashing for a moment.
* Lamp Life Time Confirmation
1. Method1 : Enter ADJ mode with using the remote control. You can be confirmed
because “ Lamp Life Time XX hr“ is appeared.
2. Method2 : With using the remote control offerd to consumer if you press the
menu button continuously, OSD menus will disappear then press the “9876“ and
press the “OK“ button to enter ADJ mode you can see “Lamp Life Time XX hr“
- 19 -
REPLACING THE LAMP
< Fig. 1>
< Fig. 2>
< Fig. 3>
Block Diagram
- 20 -
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