LG RU-44SZ80L - - 44" Rear Projection TV User manual

LCD PROJECTION TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : MB-042B
MODEL : RU-44SZ80L
CANADA : http//biz.lgservice.com
USA : http//www.lgservice.com
: http//lgservice.com/techsup.html
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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 [phone]
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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SPECIFICATIONS.................................................................4
DESCRIPTION OF CONTROLS...........................................5
ADJUSTMENT INSTRUCTION...........................................12
PRINTED CIRCUIT BOARDS.............................................15
BLOCK DIAGRAM...............................................................26
EXPLODED VIEW...............................................................28
EXPLODED VIEW PARTS LIST.........................................29
REPLACEMENT PARTS LIST............................................30
SCHEMATIC DIAGRAM..........................................................
TABLE OF CONTENTS
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Product Specifications
Model
Horizontal Size (Inches) 39.2
Height (Inches) 29.2
Depth (Inches) 14.4
Weight (lbs.) 50.7
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) 220W
Antenna 75 ohm External Terminal for VHF/UHF
Audio Output (W) 12W x 2
Supplied Accessories Remote control, 2 size AA batteries, 2 filters.
External Input/Output Ports A/V input (3 set)
A/V output (1 set)
S-Video input (2)
Component input (2 set)
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)
Design and specifications are subject to change without prior notice.
SPECIFICATIONS
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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 Power cord is not connected.
Red Power Cord is connected, TV is in standby mode.
Green TV turns 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. Contact your service center.
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. Check the blocked vents of
the projection TV and the accumulated dust in the dust filter.
Red The projection TV shut down due to overheating.
Red (flashing) The projection TV shut down, check the cooling fan. Contact
your service center.
Operation Indicator
Lamp Indicator
Temperature Indicator
DESCRIPTION OF CONTROLS
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AUDIO
CENTER
MODE IN
DVI INPUT
COMPONENT
INPUT2 INPUT1
PR
PB
Y
PC/DTV
(XGA/
480p/
720p/
1080i)
PC/DTV
(XGA/
480p/
720p/
1080i)
RGB INPUT
UPGRADE PORT RGB/DVI INPUT
(R)
(L)
AUDIO
(R)
(L)
AUDIO
(R)
(L)
AUDIO
VARIABLE
AUDIO OUT
MONITOR
OUT VIDEO INPUT 2 VIDEO INPUT 1
S-VIDEO
(R)
(L)
AUDIO
VIDEO
MONO
+75 Ω
ANT IN
DVI /DVD
(480i/
480p/
720p/
1080i)
(480i/
480p/
720p/
1080i)
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
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 system.
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.
Component Input 1-2
Connect a component video/audio
device to these jacks. 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.
RGB/DVI Input
Connect the TV output
connector from a PC/DTV
to the appropriate input
port.
RGB/DVI 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 out-
put.”
Fan Cover
Replace or clean the filter
to prevent a dust every
1~3 months. When clean-
ing or replacing the filter,
certainly turn the power off.
The dust filter must be
washed in tepid water with
netural detergent.
DESCRIPTION OF CONTROLS
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Side Connection Panel
Side A/V Panel
S-VIDEO
VIDEO
SIDE VIDEO
AUDIO
(R)
(L)/
MONO
There are four jacks on the left side 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 connect-
ed to the side connection panel.
To use the side jacks as the signal source, select them
using Main Input menu as described on page 25. They will
be named “Side Video” in the Main Input menu.
Left/Right Audio
Used for stereo
sound from various
types of equipment.
Video
Connects the video sig-
nals 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 input both Side Video and
S-Video, only the S-Video will
work.
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).
DESCRIPTION OF CONTROLS
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Remote Control Functions in TV Mode
123
456
789
0
TV
MODE LIGHT POWER
TV/VIDEO DVI
RGB
VCR CABLE DVD SAT
MUTE
SWAPPIPCH- PIPCH+
PIP
RATIO
RECORD STOP
PAUSE
REW
PLAY
FF
MENU EXIT
CC FREEZE
PIP INPUT
VOL CH
SURF
SAP VIDEO
COMP2COMP1
SIDE
SKIP
ENTER
FLASHBK
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.
FREEZE
Captures and freezes the currently-
viewed main picture.
VIDEO
Adjusts the factory preset
picture according to the
room.
PIPCH+
Changes to next higher PIP
channel.
SWAP
Switches the picture from
PIP, POP, or twin picture to
the main screen.
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, Side video,
Component1-2, RGB, and DVI
input sources.
MODE
Selects the remote operating
mode: TV, VCR, Cable, DVD
and Satellite. Select other oper-
ating modes, for the remote to
control external devices.
SIDE
Selects the side video signal if
a device, such as a camcorder
or game player, is connected
to the side video input jack.
DVI
Selects: DVI-DTV and DVI-
PC input sources.
SAP
Selects: Mono, Stereo, and
SAP.
PIPCH-
Changes to next
lower PIP channel
PIP
Toggles between PIP, POP
(Picture-out-of-Picture) and
Twin picture mode.
LIGHT
Illuminates the remote con-
trol keys.
INDICATOR LIGHTS
Show active remote mode
every time any button is
pressed.
D
E
DESCRIPTION OF CONTROLS
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Remote Control Functions in TV Mode
123
456
789
0
TV
MODE LIGHT POWER
TV/VIDEO DVI
RGB
VCR CABLE DVD SAT
MUTE
SWAPPIPCH- PIPCH+
PIP
RATIO
RECORD STOP
PAUSE
REW
PLAY
FF
MENU EXIT
CC FREEZE
PIP INPUT
VOL CH
SURF
SAP VIDEO
COMP2COMP1
SIDE
SKIP
ENTER
FLASHBK
POWER
Turns your TV or any other
programmed equipment on
or off, depending on mode.
CHANNEL UP/DOWN
Scrolls through available channels
in EZ Scan memory.
NUMBER KEYPAD
For direct channel selection and
programming functions.
ENTER
When in the menu system
and other on-screen dis-
plays, selects highlighted
options.
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.
COMPONENT 1, 2
Selects component signal sources,
such as DVD or HD receiver.
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.
PIP INPUT
Selects the input source for the
sub picture.
RGB
Selects: RGB-DTV and
RGB-PC input sources.
DESCRIPTION OF CONTROLS
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On-Screen Displays
This page describes your on-screen display and information banner options.
10 AM 3:00
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 when
pressing the
enter button.
ABC
DESCRIPTION OF CONTROLS
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Front Panel Controls
POWER MENU ENTER VOL CH
124
3678
5
POWER
MENU
ENTER (Same as ENTER button on your
remote control)
VOLUME UP / DOWN
CHANNEL UP / DOWN
Operation indicator.
Lamp indicator.
Temperature indicator.
1
2
3
4
5
6
7
8
See menu pages for instructions on using the
on-screen menus.
The POWER, MENU, ENTER, VOLUME, and
CHANNEL buttons work just as they do on
your remote control.
If TV is moved from cold to normal room tem-
perature, condensation may form inside TV,
wait 3 hours the TV to adjust to room tempera-
ture before turning it on.
DESCRIPTION OF CONTROLS
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ADJUSTMENT INSTRUCTIONS
1. Application Object
This instruction is for the application to the LCD projection
TV(MB-042B Chassis).
2. Notes
(1) The use of an isolation transformer is not needed although it
may be desired to protect test 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 minutes preliminary before
adjustment if there is no specific designation.
The preliminary operation must be performed using 100%
white pattern, but reception of the moving picture may also be
possible in unavoidable case.
3. Composition of Adjustment Mode
(1) All adjustment mode are entered by pressing the ADJ key on
the service remote control, after adjustment press the ADJ key
to exit.
(2) Composition of adjustment mode: The first screen composi-
tion of pressing ADJ 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 desired menu.
(4) After accessing the SUB menu, select the item to be adjusted
by using (CH+(D),CH-(E)) key and adjust the value of adjust-
ment with using the volume +(F),volume - (G) key.
(5) Press the ADJ key to exit the adjustment menu.
4. NRS Adjustment
When the LCD panel 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.
5. Screen Position Adjustment
(Horizontal/Vertical Position Adjustment)
5-1. Required Test Equipment
Remote control for adjustment
5-2. Preparation for Adjustment
(1) Connect a power source with TV Set and turn TV Set on.
(2) Do heat run for 15 min or more before adjustment.
(3) Receive the main/sub signal 13CH by split screen.
(4) Adjust screen ratio to 16:9 by pressing ARC Key.
5-3. Horizontal Position Adjustment
(1) Press ADJ key on the remote control to enter the adjustment
mode.
(2) Select 2. Position.
(3) Select H_Position by using the channel key in adjust mode.
(4) Adjust data by using the Volume key on the remote control in
order to be left/right symmetry screen. (Three blocks of the
most outer block must be located in the most outer block.)
(Refer to Fig. 3)
5-4. Vertical Position Adjustment
(1) Select V_Position with channel key in adjust mode.
(2) Change the data to become symmetrized on the top and bot-
tom of the screen(refer to Fig. 2) by pressing the Volume key
on Remote Control.
EZ ADJUST
1. M62352
2. Position
3. AD9883A-set
4. GAMMA
5. Uniformity
6. CONTRAST
7. RGB Alignment
8. System Option
9. Lamp Replace
(Fig. 2) Adjustment for Horizontal/Vertical Position on Screen
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ADJUSTMENT INSTRUCTIONS
6. Component 2 Offset Adjustment
6-1. Required Test Equipment
Remote control for adjustment, 802F
6-2. Preparation for Adjustment
(1) Connect a power source with TV Set and turn TV Set on.
(2) Run the unit in "Heat Run" mode for 15 min and over before
adjustment.
(3) Receive the Component 2 signal.
(4) Receive the 720P and HozTVBar Pattern of 802F.
6-3. Offset Adjustment
(1) Press ADJ key on the Remote Control to enter the adjustment
mode after more than 10 seconds of receiving the signals.
(2) Press the Enter key in 3. AD9883-set of adjustment item to
adjust automatically.
(3) When the adjustment is completed, enter the adjustment
mode by pressing Enter key after appearing “ Adjustment
Completion(Press the Enter)” OSD.
7. Adjustment of White Balance and Gamma
7-1. 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
7-2. Preparation for Adjustment
(1) Select the VDP Test Pattern signal to R1, G1, B1.
(2) Press the Instart key to select 1. LCD --> 2. 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 ENTER button on Remote
Control.
(5) Select 3. 7050 RGB Set in adjustment mode.
(6) Check the data 1. RContrast, 8. GContrast, 15. BContrast is
515. Otherwise set the data 515 by using volume button.
7-3. Adjustment Sequence
(1) Output the 255,255,255 signal of VDP Test Pattern, then dis-
play the maximum white pattern on screen.
(2) Gamma Adjust Mode is display as below when select 4.
Gamma adjust by selecting ADJ key on R/C.
(3) Change the 16 Step RGB Data to select white balance
x=283, y=297(D9300K).
(4) Measure the luminance 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 : measured
luminance data n1 = every step unit when separating 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).
(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 luminance in
3).
7-4. Gamma adjustment manually
This adjustment is only to be done after the Gamma and White
Balance adjustments are adjusted.
(1) Prepare the PC Pattern Generator which is possible to output
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 ADJ button on Remote Control and then
adjust the level data of each step manually in sub menu of 4.
Gamma Manual 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
ADJ button on Remote Control.
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
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ADJUSTMENT INSTRUCTIONS
8. Brightness Adjustment of Main/Sub
Screen
(1) Receive signal(RF 06Ch.) on the Main/Sub screen in the twin
picture.
(2) Confirms picture probably is the normal.
(3) Check the “US06CH” with naked eyes in 06Ch. pattern and if
there is difference, make the adjustment so that the field and
the letters are distinguished.
(4) Adjusting Main screen
1) Select the 6. CONTRAST by pressing “ADJ” key on the
remote control for adjustment.
2) Select the Contrast(m) of adjustment item using CH +/- key
and revises using VOL +/- key.
(5) Adjusting Sub screen
1) Select the 6. CONTRAST by pressing “ADJ” key on the
remote control for adjustment.
2) Select the Contrast(s) of adjustment item using CH +/- key
and revises using VOL +/- key.
* Only make adjustments +/- 2 at one time.
9. Check and adjustment RGB Alignment
9-1. Required Test Equipment
Remote control for adjustment
9-2. Preparation for Adjustment
(1) Connect power source with TV Set and turn TV Set on.
(2) Before adjusting, Heat Run more than 15 minutes.
9-3. Check and adjustment RGB Alignment
(1) After pressing EYE key, enter the (Fig. 3) pattern.
(2) Check the RGB Align
(3) When fitting RGB Align, adjustment is completed.
(4) When deviating RGB Align, select the 7. H-Position by press-
ing “ADJ” key on the Remote Control for Adjustment.
Change the Channel key to select H POS R, H POS G, H
POS B and fit color.
(Fig. 3) Deviating Red Pixel, collectively(before adjusting)
(Fig. 4) After adjusting RGB Align(normal screen)
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PRINTED CIRCUIT BOARD
MAIN(TOP)
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PRINTED CIRCUIT BOARD
MAIN(BOTTOM)
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PRINTED CIRCUIT BOARD
TUNER(TOP)
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PRINTED CIRCUIT BOARD
TUNER(BOTTOM)
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PRINTED CIRCUIT BOARD
DRIVER(TOP)
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PRINTED CIRCUIT BOARD
DRIVER(BOTTOM)
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