LG DU-52SZ61D User manual

DLP PROJECTION TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : NB-04AA
MODEL : DU-52SZ61D
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.............................................8
PRINTED CIRCUIT BOARDS.............................................21
BLOCK DIAGRAM...............................................................31
EXPLODED VIEW...............................................................32
EXPLODED VIEW PARTS LIST.........................................33
REPLACEMENT PARTS LIST............................................34
SCHEMATIC DIAGRAM..........................................................
TABLE OF CONTENTS
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•The specifications shown above may be changed without prior notice for quality improvement.
MODELS
AC120V, 60Hz
NTSC-M, ATSC
VHF 2 ~ 13, UHF 14 ~ 69, CATV 1 ~ 135, CADTV 1 ~ 135. DTV 2 ~ 69
75 Ω
Power requirement
Television System
Program Coverage
External Antenna Impedance
DU-52SZ51D / DU-52SZ61D
SPECIFICATIONS
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Controls
Controls
POWER TV GUIDE VOL CH
ENTER
POWER Button
VOLUME (FF,GG) Buttons
Remote Control Sensor
CHANNEL (EE, DD) Buttons
Operation Indicator
Lamp Indicator
Temperature Indicator
ENTER Button
TV GUIDE Button
Off Power Cord is not connected.
Red Power Cord is connected, TV is in standby mode.
Green TV turns on.
Red (flashing) Power Cord is connected, TV is in booting sequence.
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
- Lamp indicator, operation indicator, and temperature indicator located below the front panel controls, reveal the
operating status of the DLP projection TV.
Function Status Indicators
Function Status Indicators
DESCRIPTION OF CONTROLS
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Connection Options
Connection Options
PC/DTV
(XGA
/480p
/720p
/1080i)
S-VIDEO
PR
PB
Y
MONO
CABLE
RGB INPUT
COMPONENT
INPUT2 INPUT1
DTV/DVD INPUT
RGB/DVI INPUT
(L)
(R)
AUDIO
(L)
(R)
AUDIO
VIDEO
(L)
(R)
AUDIO
(L)
(R)
AUDIO
AUDIO
CENTER
MODE IN
MONITOR
OUTPUT VIDEO INPUT2 VIDEO INPUT1
DIGITAL AUDIO
OPTICAL INPUT1
(COMPONENT2)
DIGITAL AUDIO
OPTICAL INPUT2
(DVI)
IEEE1394
DIGITAL AUDIO
OPTICAL OUTPUT
ANTENNA
S-VIDEO
FRONT A/V
VIDEO
AUDIO
(R)
(L)/
MONO
Cable
CARD
HDMI/
DVI(VIDEO)
UPGRADE
PORT
VARIABLE
AUDIO OUT
G-LINK
Back Connection Panel
Back Connection Panel
ANTENNA Inputs
Connect antenna signals to the
TV directly .
DIGITAL AUDIO OPTICAL
OUTPUT
Used to connect either an exter-
nal amplifier, or add a sub-
woofer to your surround sound
system if it has a digital
audio optical input.
(Refer to )
MONITOR OUTPUT
Connect a second TV or
Monitor.
S-VIDEO In
A connection available
with some high-end
equipment that provides
even better picture qual-
ity for Video 2.
RGB/DVI INPUT
Connect the monitor
output connector from
a PC to the appropri-
ate input port.
RGB Input
Connect the TV output
connector from a PC/DTV
to the appropriate input
port.
AUDIO CENTER MODE IN
Connect to external Dolby
Digital Center “preamp
output.”
VARIABLE AUDIO OUT
Used to connect either
an external amplifier, or
add a sub-woofer to your
surround sound system.
COMPONENT INPUT 1-2
Connect a component
video/audio device to these
jacks. Refer to your DVD
manual for further informa-
tion.
VIDEO 1 or 2
Connects the video sig-
nals from various types
of equipment.
Left/Right AUDIO
Used for stereo sound
from various types of
equipment.
HDMI/DVI(VIDEO)
Connect a
HDMI/DVI(Video) signal
to this jack.
IEEE1394
Connect DVHS or
MicroMV to IEEE1394
Connector.
CableCARD
Used for CableCARD
received Cable Service
Provider.
CABLE Inputs
Connect cable signals to the
TV, either directly or through
your cable box.
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 pro-
vides better pic-
ture quality
than video
input.
G-LINK
Connect an
IR controller
to this jack.
DIGITAL AUDIO OPTI-
CAL INPUT1(COMPO-
NENT2)
Connect digital audio
from the equipment
whose video is connect-
ed to COMPONENT 2.
DIGITAL AUDIO OPTI-
CAL INPUT2(DVI)
Connect digital audio
from the equipment
whose video is connect-
ed to
HDMI/DVI(VIDEO).
(Refer to )
Note: In standby mode, these port will not work.
If the video is connected through HDMI-TO-HDMI cable, you don’t need to connect digital audio. This port
is used only when the video connected through DVI-TO-HDMI cable.
1
2
1
2
DESCRIPTION OF CONTROLS
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LIGHT
TV/VIDEO
MODE
COMP/RGB/HDMI
MUTE SURF
VOL CH
PGUP
PGDN
INFO
SAP
RATIO
CC
MENU
TV GUIDE
TIMER
EXIT
PLAY PAUSE STOP
RECORD
PIP PIPCH- PIPCH+ PIPINPUT
ENTER
SIGNAL SWAP
REW FF
POWER
1394
FLASHBK
VIDEO SOUND
ADJUST FREEZE
DAY +
DAY -
SKIP
Remote Control Key Functions
Remote Control Key Functions
-When using the remote control, aim it at the remote control sensor on the TV.
VCR/DVD BUTTONS
Control some video cassette recorders or
DVD player ("RECORD" button is not avail-
able for DVD player.)
Selects the frequency setting in the record-
ing: Once, Regulary, Weekly, Off.
RATIO
Changes the aspect ratio.
MODE
Selects the remote operating mode: TV,
VCR, DVD, CABLE, HDSTB or AUDIO.
Select other operating modes, for the
remote to operate external devices.
POWER
Turns your TV or any other programmed
equipment on or off, depending on mode.
1394
SURF
Use to scroll the Surf channel.
CC
Select a closed caption:
Off, CC1~4, Text1~4.
FLASHBK
Tunes to the last channel viewed.
CHANNEL UP/DOWN
Selects available channels found with EZ
scan.
PAGE UP/PAGE DOWN
Moves from one full set of screen infor-
mation to the next one.
EXIT
Clears all on-screen displays and returns to
TV viewing from any menu.
TIMER
Lets you select the amount of time before
your TV turns itself off automatically.
PIP
Switches between PIP, POP (Picture-out-of-
Picture) and Twin picture modes.
Switches the video window locking or
unlocking in the Listing Grid.
PIPCH-/PIPCH+
Changes to next higher/lower PIP channel.
PIP INPUT
Selects the input source for the sub picture.
SWAP
Exchanges the main/sub images in
PIP/Twin picture mode.
DAY+/DAY-
Moves forward or backward in 24 hour
increments in the Listings Grid.
LIGHT
Illuminates the remote control buttons.
TV/VIDEO
Selects: Antenna,Cable,Video1,2, Front
Video, Component 1-2, RGB-DTV (or RGB-
PC), HDMI/DVI input sources.
COMP/RGB/HDMI
Selects: Component 1-2, RGB-DTV (or RGB-
PC), HDMI/DVI input sources.
NUMBER buttons
DASH
Used to enter a program number for multiple
program channels such as 2-1,2-2,etc.
MUTE
Switches the sound on or off.
THUMBSTICK (Up/Down/Left/Right/ENTER)
Allows you to navigate the on-screen menus
and adjust the system settings to your pref-
erence.
VOLUME UP/DOWN
Increases/decreases the sound level.
SAP
Selects MTS sound: Mono, Stereo, and SAP
in Analog mode. Change the audio language
in DTV mode.
MENU
Brings up the main menu to the screen.
Enter or exit the panel menu in the Guide
Screen.
INFO
When you watch the TV, displays information
on top of the screen. Not available in
Component 1-2, RGB and HDMI/DVI mode.
TV GUIDE
Brings up the TV Guide On Screen system to
the screen.
VIDEO
Adjusts the factory preset picture
according to the viewing
environment.
ADJUST
Adjusts screen position, size, and
phase in PC mode.
SOUND
Selects the sound appropriate
for the program's character.
SIGNAL
Displays the digital signal strength.
FREEZE
Freezes the currently-viewed picture. Main pic-
ture is frozen in PIP/Twin picture mode.
DESCRIPTION OF CONTROLS
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ADJUSTMENT INSTRUCTIONS
1. Application Object
These instructions apply to the DLP Projection (Chassis: NB-
04AA).
2. Notes
(1) Because this is not a hot chassis,it is not necessary to use
an isolation transformer. However, the use of an insolation
transformer will help protect test equipment.
(2) The adjustments must be performed in the correct
sequence.
(3) The adjustments must be performed in the condition of
25±5°C of temperature and 65±10% of relative humidity if
there is no other specific designation.
(4) The input voltage of the receiver must remain AC 110V,
60Hz.
(5) Unless stated otherwise, the set must be operated for at
least 5 minutes prior to adjustments.
The heat-run should be performed with a 100% white
pattern,but reception of a moving picture may also be
possible in unavoidable cases.
3. Composition of Adjustment Mode
(1) Adjustment modes are entered by pressing the ADJ key
on the Service Remote Control, after adjustments press
the ADJ key to exit.
(2) Initial Adjustment mode Menu is shown below. <Fig. 1>
(3) As shown <Fig. 1>, using the CH+ (D), CH- (E) keys to
select an item, press the ENTER or VOLUME+ (G) keys to
enter the appropriate item and begin adjustment.
(4) Change the value of adjustment with using the volume +(G),
volume -(F) keys. To change adjustment item, use the
CH+ (D), CH- (E) keys in EZ ADJ Mode.
(5) Press the ADJ key to exit, after adjustments.
(6) Preparation for Adjustment
1) Connect the power to TV Set and set “Power on”.
2) Allow set to Heat-Run for at least 5 minitues before
adjusting.
4. Driver Board Bin Setting
See Bias Voltage Bin on the DMD as shown <Fig. 2> and
adjust the switches on the lower Driver Board as shown <Fig.
3>.
<Fig. 2> DMD Marking Locations
<Fig. 1> Adjustment Mode OSD
<Fig. 3> Driver Board Bin Setting
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ADJUSTMENT INSTRUCTIONS
5. Adjusting the Optical Engine
(1) After placing the optical engine on the JIG, adjust
illuminator by adjuting the A, B, and C as shown <Fig. 4>.
1) Screen change when adjusting screw A
Tighten the screw: Upper/right illuminator are out of joint
Loosen the screw: Lower/left illuminator are out of joint
2) Screen change when adjusting screw B
Tighten the screw: Lower illuminator is out of joint
Loosen the screw: Upper illuminator is out of joint
3) Screen change when adjusting screw C
Tighten the screw: Upper/left illuminator are out of joint
Loosen the screw: Lower/right illuminator are out of joint
Check the spot (phenomenon such as Light tunnel exit) on the
edge of the white screen as shown <Fig. 5>.
(2) After adjusting the illuminator, adjust the focus by using the
focus adjustment screw of projection lens. After adjusting,
fasten the screw tighty and secure with sealer.
[Note: The focus check point is not the screen center but the
upper/lower screen.
1) <Fig. 7> shows the pattern for focus adjustment
2) Adjust the 4 green ellipse so that all are in equal focus.
3) If you can’t check the DMD cell border at red center
position after adjustment, regard as NG.
4) <Fig. 8> shows the magnified pattern for checking the
focus adjustment
<Fig. 5>
<Fig. 6>
<Fig. 7>
<Fig. 8>
A
B
C
<Fig. 4>
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ADJUSTMENT INSTRUCTIONS
6. Caution for DMD
(Digital Micro-mirror Device)
6-1. Caution for DMD ESD
(1) Use a grounding strap to prevent ESD (Electrostatic
Dischage) damage when handing the DMD.
(2) Connect the grounding strap to a ground point on the
workbench.
(3) Keep the DMD in an ESD Safe container when not being
used or in transit.
(4) Wearing gloves will help prevent ESD damage and help
preserve the physical condition of the DMD.
(5) All work should be performed in a static free environment.
(6) Use caution and remove any dust particles on the DMD
front glass or back pins/pads.
6-2. Caution for DMD Cleaning
(1) Use caution to prevent scratches to the DMD glass.
(2) When DMD glass stains with dust, polish the front and
back DMD glass with soft cloth. Then, rotate the DMD 180
degrees and polish again.
(3) Do not use pressure when cleaning the DMD. The static
electricity and pollution can damage the DMD.
7. EDID(HDMI) Data Input
7-1. Required Test Equipment
(1) Jig for adjusting PC, DDC (PC serial to D-sub connection
device)
(2) S/W for writing DDC(EDID data write & read)
(3) D-sub terminal
(4) Jig for connecting EDID(HDMI) Cable
7-2. Adjustment Preparation and Setting of
Device
(1) Setup as in <Fig. 9> and turn on the PC & JIG.
(2) Operate the S/W for writing DDC(EDID data write & read)
(operated in DOS mode.)
8. CPLD Download Work
8-1. Required Test Equipments &
Preparation for Adjustment
(1) Connect the PC and memory JIG as shown in <Fig. 10>.
(2) Turn on JIG MAIN POWER SW.
(3) Turn on the PC and moniter, operate the device
programming software.
8-2. Adjustment Sequence
(1) Once the program is running, [OPTION MODE
SELECTION] is displayed in the window.
Check the “Load configuration File(.cdf, .pdr)” in this
window and click the finish button
(2) When the screen displays the open window, select the
suitable file(*.cdf) according to model.
(3) IC figure is change to green by clicking it.
(Refer to <Fig. 11>)
<Fig. 9> Device Setting Diagram of Input EDID Data
<Fig. 10 > How to connect the MEMORY JIG and PC
<Fig. 11>
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