Service Manuals, User Guides, Schematic Diagrams or docs for : LG Projectie TV Training RU-60SZ30 lg_nb03ja_chassis_ru52sz30_projection
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website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
LCD PROJECTION TV
SERVICE MANUAL
CHASSIS : NB-03JA
MODEL : RU-52SZ30 RU-60SZ30
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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, 26
EXPLODED VIEW PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25,27
REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
SCHEMATIC DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-2-
SAFETY PRECAUTIONS
IMPORTANT SAFETY NOTICE
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 Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source,
An lsolation Transformer should always be used during connect an electrical jumper across the two AC plug prongs.
the servicing of a receiver whose chassis is not isolated from Place the AC switch in the on positioin, connect one lead of
the AC power line. Use a transformer of adequate power rating ohm-meter to the AC plug prongs tied together and touch other
as this protects the technician from accidents resulting in ohm-meter lead in turn to each exposed metallic parts such as
personal injury from electrical shocks. antenna terminals, phone jacks, etc.
If the exposed metallic part has a return path to the chassis, the
It will also protect the receiver and it's components from being measured resistance should be between 1M and 5.2M.
damaged by accidental shorts of the circuitary that may be When the exposed metal has no return path to the chassis the
inadvertently introduced during the service operation. reading must be infinite.
An other abnormality exists that must be corrected before the
If any fuse (or Fusible Resistor) in this TV receiver is blown, receiver is returned to the customer.
replace it with the specified.
Leakage Current Hot Check (See below Figure)
When replacing a high wattage resistor (Oxide Metal Film Plug the AC cord directly into the AC outlet.
Resistor, over 1W), keep the resistor 10mm away from PCB. Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
Keep wires away from high voltage or high temperature parts. between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Due to high vacuum and large surface area of picture tube, Measure the AC voltage across the resistor using AC
extreme care should be used in handling the Picture Tube. voltmeter with 1000 ohms/volt or more sensitivity.
Do not lift the Picture tube by it's Neck. Reverse plug the AC cord into the AC outlet and repeat AC
voltage measurements for each esposed metallic part. Any
Before returning the receiver to the customer, voltage measured must not exceed 0.75 volt RMS which is
corresponds to 0.5mA.
always perform an AC leakage current check on the exposed In case any measurement is out of the limits sepcified, there is
metallic parts of the cabinet, such as antennas, terminals, etc., possibility of shock hazard and the set must be checked and
to be sure the set is safe to operate without damage of repaired before it is returned to the customer.
electrical shock.
Leakage Current Hot Check circuit
AC Volt-meter
Good Earth Ground
such as WATER PIPE,
To Instrument's CONDUIT etc.
0.15uF
exposed
METALLIC PARTS
1.5 Kohm/10W
-3-
SERVICING PRECAUTIONS
CAUTION: Before servicing instruments covered by this service manual and 3. The components used in the unit have a specified flame resistance and
its supplements, read and follow the SAFETY PRECAUTIONS section of this dielectric strength. When replacing any components, use components
manual. Note: If unforeseen circumstances create conflict between the follow-
ing servicing precautions and any of the safety precautions, always follow the
which have the same ratings. Components identified by shading, by , or
by
*
in the circuit diagram are important for safety or for the characteristics
safety precautions. Remember: Safety First. of the unit. Always replace with the exact replacement components.
General Servicing Precautions 4. An insulation tube or tape is sometimes used and some components are
1. a. Always unplug the instrument AC power cord from the AC power source raised above the printed wiring board for safety. The internal wiring is some-
before: (1) removing or reinstalling any component, circuit board, module, times clamped to prevent contact with heating components. Install them as
or any other instrument assembly. (2) disconnecting or reconnecting any they were.
instrument electrical plug or other electrical connections. (3) connecting a
test substitute in parallel with an electrolytic capacitor in the instrument. 5. After servicing, always check that the removed screws, components, and
Caution: A wrong part substitution or incorrect polar-ity installation of wiring have been installed correctly and that the portion around the service
electrolytic capacitors may result in an explosion hazard. part have not been damaged. Further, check the insulation between the
b. Do not defeat any plug/socket B+ voltage interlocks with which instru- blades of the attachment plug and accessible conductive parts.
ments covered by this service manual might be equipped.
c. Do not apply AC power to this instrument and/or any of its electrical INSULATION CHECKING PROCEDURE
assemblies unless all solid-state device heat sinks are correctly installed. Disconnect the attachment plug from the AC outlet and turn the power on.
d. Always connect a test instrument's ground lead to the instrument chassis Connect the insulation resistance meter (500 V) to the blades of the attach-
ground before connecting the test instrument positive lead. ment plug. The insulation resistance between each blade of the attachment
Always remove the test instrument ground lead last. plug and accessible conductive parts (Note 1) should be more than 1 Mohm.
Note: Refer to the Safety Precautions section of this manual. Note: Accessible conductive parts include metal panels, input terminals, ear-
phone jacks, etc.
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.
ELECTROSTATICALLY SENSITIVE (ES) DEVICES
Some semiconductor (solid-state) devices can be damaged eas- 5. Do not use freon-propelled chemicals. These can generate
ily by static electricity. Such components commonly are called electrical charge sufficient to damage ES devices.
Electrostatically Sensitive (ES) Devices. Examples of typical ES
devices are integrated circuits and some field-effect transistors 6. Do not remove a replacement ES device from its protective
and semiconductor "chip" components. The following techniques package until immediately before you are ready to install
should be used to help reduce the incidence of component dam- t.(Most replacement ES devices are packaged with leads elec-
age caused by static electricity. trically shorted together by conductive foam, aluminum foil, or
comparable conductive material.)
1. Immediately before handling any semiconductor component
or semiconductor-equipped assembly, drain off any electrosta- 7. Immediately before removing the protective material from the
tic charge on the body by touching a known earth ground. leads of a replacement ES device, touch the protective materi-
Alternatively, obtain and wear a commercially available dis- al to the chassis or circuit assembly into which the device will
charging wrist strap device, which should be removed for be installed.
potential shock reasons prior to applying power to the unit Caution: Be sure no power is applied to the chassis or circuit,
under test. and observe all other safety precautions.
2. After removing an electrical assembly equipped with ES 8. Minimize bodily motions when handling unpackaged replace
devices, place the assembly on a conductive surface such as ment ES devices. (Otherwise, seemingly harmless motion,
aluminum foil, to prevent electrostatic charge buildup or expo- such as the brushing together of your clothing or the lifting of
sure of the assembly. your foot from a carpeted floor, can generate static electricity
sufficient to damage an ES device.)
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.
-4-
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 Temperature Indicator
Lamp Indicator
Off Power cord is not connected.
Red Power Cord is connected, TV is in standby mode.
Operation Indicator
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.
Lamp Indicator 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.
Temperature Indicator Red The projection TV shut down due to overheating.
Red (flashing) The projection TV shut down, check the cooling fan.
-5-
On-Screen Displays
This page describes your on-screen display and information banner options.
Channel Label
Main Channel Display If a channel label has been
Displays current channel number. set, then it will appear here.
TV 13 PIP Display
MONO This display
appears when
ABC PIP is active.
TV 6
AM 03:00
10
Time
Mute Appears when
Appears pressing the
when sound enter button on
is muted. Volume remote control.
Volume level is displayed while
adjusting the sound.
-6-
Front Panel Controls
1 Power On / Off
2 Menu
3 Enter (Same as ENTER button on
your remote control)
4 VOLUME UP / DOWN
5 CHANNEL UP / DOWN
6 Operation indicator.
Lamp indicator.
7
8 Temperature indicator.
RU-52SZ30
power menu enter vol ch
1 3 6 8
4 5 7
2
power menu enter vol ch
RU-60SZ30
See menu pages for instructions on using the
on-screen menus.
The POWER, CHANNEL and VOLUME buttons
work just as they do on your remote control.
Don't turn TV on after placing TV from low tempera-
ture to normal temperature. It may cause humidity of
inside TV. Try it again after about 3 hours.
-7-
Remote Control Functions in TV Mode
MODE
Selects the remote operating
mode: TV, VCR, Cable, DVD
and Satellite. Select other oper- INDICATOR LIGHTS
ating modes, for the remote to Show active remote mode
control external devices. every time any button is
TV/VIDEO tv vcr cable dvd sat pressed.
Selects: Analog, Video1, LIGHT
Video2, Front video, mode light power Illuminates the remote con-
Component1-2, RGB, and DVI trol keys.
input sources.
tv/video front dvi
FRONT
Selects the front video signal if
DVI
comp1 comp2 rgb Selects: DVI-DTV and DVI-
a device, such as a camcorder
PC input sources.
or game player, is connected
to the front video input jack.
MUTE 1 2 3
Switches the sound on or off SURF
4 5 6 Scrolls the Surf channel list.
SAP 7 8 9
Selects: Mono, Stereo, and
SAP. VIDEO
enter 0 flashbk
Adjusts the factory preset pic-
mute surf ture according to the room.
PIP
Toggles between PIP, POP sap video
(Picture-out-of-Picture) and
Twin picture mode.
vol ch SWAP
Swap the signal from your
pip pipch- pipch+ swap PIP, POP, twin picture
mode to the main screen.
PIPCH-
Changes to next PIPCH+
lower PIP channel cc freeze pip input Changes to next higher PIP
ratio
channel.
THUMBSTICK
Allows you to navigate the on-screen
menus and to adjust the system set- FREEZE
tings and preferences, by moving to Captures and freezes the currently-
D
an option withF E G and selecting the viewed sub picture in PIP mode.
highlighted option with .
menu exit
MENU EXIT
Brings up the main Clears all on-screen dis-
menu to the screen. play pause stop record plays and returns to TV
viewing from any menu.
rew ff
skip
-8-
Remote Control Functions in TV Mode
tv vcr cable dvd sat
mode light power
POWER
tv/video front dvi
Turns your TV or any other
programmed equipment on
or off, depending on mode.
comp1 comp2 rgb
RGB
COMPONENT 1, 2 Selects: RGB-DTV and
Selects component signal sources,
such as DVD or HD receiver. 1 2 3 RGB-PC input sources.
NUMBER KEYPAD 4 5 6
For direct channel selection and
programming functions.
7 8 9
ENTER
When in the menu system and enter 0 flashbk FLASHBK
other on-screen displays, Tunes to the last channel
mute surf
selects highlighted options. viewed.
sap video
VOLUME UP/DOWN vol ch CHANNEL UP/DOWN
Scrolls through available chan-
Increases/decreases the sound
pip pipch- pipch+ swap nels in EZ Scan memory.
level.
ratio cc freeze pip input
RATIO PIP INPUT
Changes the screen format or Selects the input source for the
aspect ratio. sub picture.
CC ENTER
Lets you select a closed caption When in the menu system
mode for displaying captioning and other on-screen dis-
menu exit
information when provided. plays, selects highlighted
options.
play pause stop record
RECORD, PAUSE, REW,
rew ff
FFWD, PLAY, STOP
SKIP
Control the functions on your VCR. Playing CDs: Selects
skip
songs.
Playing DVDs: Selects
movie chapters.
-9-
Rear Connections Panel
Connecting cables to your TV.
RF Connector: Antenna
Used to connect analog
ANT IN
+75 cable or antenna signals
to the television, either
directly or through your
cable box.
RGB INPUT
PC/DTV S-VIDEO In
(XGA S-VIDEO A connection available with
/480p
/720p some high-end equipment
/1080i)
COMPONENT
that provides even better
C picture quality for Video 2.
A INPUT2 INPUT1 MONITOR VIDEO VIDEO
L RGB/DVI INPUT OUT INPUT 2 INPUT 1
PC and HD-STB Input I
B
(L)
Video 1 or 2
Used to connect from a R Y VIDEO
A Connects the video sig-
PC source or HD-STB T AUDIO
I nals from various types
Satellite system. O PB (R) (L)
N of equipment.
MONO
AUDIO
AUDIO
PR CENTER (R)
MODE IN Left/Right Audio
PC/DTV
(XGA Used for stereo sound
/480p
/720p from various types of
/1080i) V A
U
equipment.
(L) (L) A
R D
I
DVI INPUT AUDIO AUDIO I
A O
B
(R) L O
(R) E U Monitor Out
T
Connects to a second TV
DTV/DVD INPUT
or Monitor.
Y, Pb, Pr PC and HD-STB Audio Variable Audio Out Audio Center Mode IN
DVD Component Video and HD Component Input Used to connect either Connect to external Dolby
Video Used for audio connec- an external amplifier, or Digital Center "preamp out-
Some top-of-the-line DVD players use what tions from a PC source or add a sub-woofer to your
put."
is called "component video," for extremely HD-STB Satellite system. surround sound system.
accurate picture reproduction. Refer to your
DVD manual for further information.
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.
- 10 -
Front Connection Panel
There are four jacks on the left front
side behind the screen on your projec-
tion 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 jack-
pack, may be connected to the front
connection panel.
To use the front jacks as the signal
source, select them using Main Source
menu as described on page 22. They
will be named "Front Video" in the Main
Source menu.
Front A/V Panel
When you select Front Video or
S-VIDEO
Front S-Video, the Front audio
inputs are automatically select- S-Video
VIDEO
ed as well. A connection avail-
L/MONO
able on some very
If you're connecting a video AUDIO
high-end equipment
game device, make sure to that provides better
R
change the Video FRONT A/V picture quality than
picture settings with the EZ Connects the video video input.
Video option in the Video menu. signals from any
piece of equipment.
Left/Right Audio
Used for stereo
sound from various
types of equipment.
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).
- 11 -
SPECIFICATION
Product Specifications
Models
RU-52SZ30 Horizontal Size (inches) 50.4
Height (inches) 38.8
Thickness (inches) 15.3
Weight (lbs) 119
RU-60SZ30 Horizontal Size (inches) 56.7
Height (inches) 42.7
Thickness (inches) 19.4
Weight (lbs) 141
Power requirement 120V, 60Hz
Television system American TV Standard, NTSC, ATSC with STB
Television Channel VHF: 2 - 13
UHF: 14 - 69
CATV: 1 - 125
Power consumption (W) 250W
Antenna 75 ohm external terminal for VHF/UHF
Audio Output (W) 10W x 2
Supplied accessories Remote control, batteries 2 size AA (Alkaline battery)
Screen Aspect Ratio 16 x 9
LCD Panel Size 0.87 inch (RU-52SZ30), 1.21 inch (RU-60SZ30)
External input ports Video input (3 set)
Video 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.
- 12 -
ADJUSTMENT INSTRUCTIONS
1. Application Object (6) SUB menu composition of each adjustment mode
This instruction is for the application to the LCD projection TV. Adjust Mode : RGB Alignment Step 123:1
10. H_Position 315/315/315
Micom:V0.50 SubMicom:V01.31 LCDMicom:V01.31 Lamp:16
2. Notes 1) Adjust Mode : Sub adjustment menu selected by IN-
(1) The power source insulation of this LCD Projection TV is START key.
not charging type and you may not use the transformer for RGB alignment is selected in this case.
insulation. But you better adjust the set after operating it 2) Step123 : Step selection when changing data.
with insulation transformer between power supply cable and ex) Step123:1 --> Change one by one when changing
input part of the set for protecting the adjusting equipment. data with Volume key
(2) The adjustment must be performed under the correct Step123:10 --> Change ten by ten when changing data
sequence. with Volume key
(3) The adjustment must be performed in the circumstance of You can select 1 by press number key `1', 10 by press
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