LG DU-52SZ61D Service 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
- 2 -
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
- 3 -
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
- 4 -
• 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
- 5 -
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
- 6 -
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 .
DIGITALAUDIO OPTICAL
OUTPUT
Used to connect either an external amplifier, or add a subwoofer 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 quality for Video 2.
RGB/DVI INPUT
Connect the monitor
output connector from
a PC to the appropriate 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 information.
VIDEO 1 or 2
Connects the video signals 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 equipment that provides better picture quality
than video
input.
G-LINK
Connect an
IR controller
to this jack.
DIGITALAUDIO OPTICAL INPUT1(COMPONENT2)
Connect digital audio
from the equipment
whose video is connected to COMPONENT 2.
DIGITALAUDIO OPTICAL INPUT2(DVI)
Connect digital audio
from the equipment
whose video is connected 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
- 7 -
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 available for DVD player.)
Selects the frequency setting in the recording: 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 information 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-ofPicture) 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
- 8 -
ADJUSTMENT INSTRUCTIONS
1. Application Object
These instructions apply to the DLP Projection (Chassis: NB04AA).
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
- 9 -
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>
- 10 -
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>
- 11 -
ADJUSTMENT INSTRUCTIONS
(4) Select program options.
(5) Check the [Erase before programming] and [Verify] menu
as shown <Fig. 12> and press the OK button.
(6) At this time, the download starts. The download will finish
in about 10 seconds.
9. Gemstar VBI Micom Download
9-1. Preparation for Adjustment
(1) As shown below, connect the MPLAB ICD2 equipment, PC
and Digital Connector.
(2) Turn on the MPLAB ICD2 POWER Supply.
(3) After turning on the PC and MONITOR, select the ‘MPLAB
IDE’ from the screen.
9-2. Adjustment Sequence
(1) Once the program is executed, select the MPLAB ICD2
from "Programmer -> Select Programmer".
(2) Select "Configure -> Select Device".
(3) When the "Select Device" window appears, select the
PIC18F1220 from "Device" and press OK.
(4) Select "Programmer -> Connect".
When connected with the Micom, the display message on
the Output window appears as below.
<Fig . 12>
+13V
CN1201
IC1204
VIB Micom
+5V
GND
Data
Clock
<Digital Board>
Connect the MPLAB ICD2 and connector of Digital Board
Connect the RS-232 or USB Cable
Connecting to MPLAB ICD 2
...Connected
Setting Vdd source to MPLAB ICD 2
Target Device PIC18F1220 found, revision = 0x4
...Reading ICD Product ID
Running ICD Self Test
...Passed
MPLAB ICD 2 Ready
- 12 -
ADJUSTMENT INSTRUCTIONS
(5) Select "File -> Import", select the Work HEX file and open.
(6) Select "Programmer -> Program".
(7) Download begins and about 3 seconds later, the
"Programming succeeded" message is displayed on the
Output window and the Download process is ended.
Note: Step (6) is more convenient when using the short-cut icon.
10. Gemstar IR Micom Download
10-1. Preparation for Adjustment
(1) As shown below, connect the MPLAB ICD2 equipment, PC
and Digital Connector.
(2) Turn on the MPLAB ICD2 POWER Supply.
(3) After turning on the PC and MONITOR, select ‘MPLAB
IDE’ from the screen.
10-2. Adjustment Sequence
(1) When the program is executed, select MPLAB ICD2 from
"Programmer -> Select Programmer"
(2) Select "Configure -> Select Device".
(3) When the "Select Device" window appears, select
PIC18F242 from "Device" and press OK.
(4) Select "Programmer -> Connect".
+13V
CN1203
IC1205
IR Micom
+5V
GND
Data
Clock
<Digital Board>
Connect the MPLAB ICD2 and connector of Digital Board
Connect the RS-232 or USB Cable
- 13 -
ADJUSTMENT INSTRUCTIONS
When connected with the Micom, the display message on
the Output window appears as below.
(5) Select "File -> Import", select the Work HEX file and open.
(6) Select "Programmer -> Program".
(7) Download begins and about 3 seconds later, the
"Programming succeeded" message is displayed on the
Output window and the Download process is ended.
Note: Step (6) is more convenient when using the short-cut icon.
11. POD Certificate Download &
IEEE1394(DTCP) Download
11-1. Preparation for Adjustment
(1) Connect the MEMORY JIG and PC.
(2) Turn on the JIG MAIN POWER SWITCH.
(3) After turning on the PC and MONITOR, execute the
‘Certificate Downloader v1.4’ from the screen.
11-2. Adjustment Sequence
(1) After opening the ‘Certificate Downloader v1.4’, enter
Connection set and set the as same below.
The port settings are determined by each PC's setup.
(2) Select ‘Connection’ and SET connected to RS-232C.
(3) After clicking "Enter", confirm that "Enter Password:"
appears.
(4) Click the "OpenFile - Download" button from CP Data
Download, ‘select the Private Key’ appears and click
ENTER.
Connecting to MPLAB ICD 2
...Connected
Setting Vdd source to MPLAB ICD 2
Target Device PIC18F242 found, revision = 0x7
...Reading ICD Product ID
Running ICD Self Test
...Passed
MPLAB ICD 2 Ready
- 14 -
ADJUSTMENT INSTRUCTIONS
(5) After clicking ENTER, the ‘opens Private key' window
appears and select the Private key applied to the SET.
The Private Key file name is on the Label of the Digital
Board.
(6) When the Dialog window appears, click OK and the
write work will begin.
(7) When completed, click ‘CP Data Download: OK’
[ When ‘CP Data Download: OK’ does not appear, certificate
has not Download correctly.
SET is rebooted and certificate Download work must be
repeated.
(8) Now, you may begin IEEE1394 (DTCP) Download work.
Select the “DTCP.dat” file by pressing the ‘DTCP File
Open’ button.
(9) After opening the ‘DTCP.dat’ file, confirm the key list in the
DTCP Key List window.
(10) Select the desired item of DTCP key List.
When pressing ‘DTCP key writing’ button, the Progress
window will appear.
- 15 -
ADJUSTMENT INSTRUCTIONS
(11) When completed, “DTCP key Download: OK" will display
in the Terminal window and the SET will reboot
automatically.
[ When process (11) malfunctions, it is not Download.
DTCP Download process start again from (8).
12. Gemstar Operation Confirmation
12-1. Required Test Equipment
(1) PC with Factory Test Program
(2) G-LINK-To-PC Card (Serial GLINK(CN1202))
(3) VBI Inserter (Norpak TES3) - Guide Data Discharge
Equipment
[ If the VBI Inserter(TES3) is not available, a VCR may be
used.
12-2. Preparation for Adjustments
(1) When using VBI Inserter(TES3): Signal uses Cable input
and set as below.
(2) When not using VBI Inserter(TES3): VCR uses Cable input
and set as below.
[ Factory Test S/W must be set to "GLinkTo PC Card" ON.
12-3. Adjustment Confirmation Work
(1) Turn on the TV and run Factory Test Program of PC.
[ Program only needs to run once, regardless of set quantity.
(2) Enter the EZ adjust menu by pressing Adjust on the
Service Remote Control (S R/C).
(3) Go to number 1 Gemstar and press Enter.
(4) TV set screen will appear as shown.
(5) Confrim that VBI Test, Glink Test and IR Test PASS from
the screen.
Input Signal
- 16 -
ADJUSTMENT INSTRUCTIONS
13. Cable Operation Confirmation
(1) Confirm that the Cable Card is inserted in the slot.
(2) Enter the EZ adjust menu by pressing Adjust on the
Service Remote Control (S R/C).
(3) Go to number 2 Cable Check and press the Right key (
G) .
(4) Confirm items below..
14. Tilt & Keystone Adjustment
14-1. Required Test Equipment
(1) Hardware: Six angle wrenches, Spanner, and Screwdriver
(2) PC to output XGA signal
(3) Service Remote Control
14-2. Preparation for Adjustment
(1) Engine Fix Knob will be able to adjust, Lower Back Cover
does not close.
(2) After Set turn on, select the adjustment pattern come out
from screen using EYE Key on the Service Remote Control .
14-3. Adjustment
(1) After Engine to be completely affixed in the adjustment
Knob pillar from TV front, sees camera sheds light TV
Screen and Keystone & Tilt confirm from back side.
(2) Keystone adjust moving to upper, lower with Top, Bottom
adjustment BOLT and Tilt adjust moving to left, right with
Engine Base.
(3) Both sides Adjustment Knob and Top Mirror adjust to be
Tilt and Keystone is Max and Min difference 4mm.
(4) After adjustment completed, Engine fixes with Top fixation
BOLT.
Name
Descrambler
Check
CableCARD
OOB Path
FDC_SNR
Video Signal
Normal
OK
CableCARD
TM
is inserted.
OK(Lock)
OK(20dB above)
Normal Screen
Defective
Not OK
CableCARD
TM
is removed.
Not OK(Unlock)
Not OK(20dB under)
Black Screen
(No Picture)
<Tilt & Keystone Adjustment Pattern>
<DLP Engine>
- 17 -
ADJUSTMENT INSTRUCTIONS
14-4. It followed in Screen Condition,
Projector Lens Direction
(1) When the upper portion of the screen is larger than the
bottom: Adjust Projection lens upward
(2) When the upper portion of the screen is smaller than the
bottom: Adjust Projection lens downward
14-5. It followed in Screen Form,
Adjustment Method
(1) When the screen is rotated: Rotate the Engine to adjust
1) Badness Type: Tilt Badness
2) Adjustment Method:
Engine Base rotate with the left/right and fix the
horizontality horizontal line of Cross Pattern
(2) In case of the upper screen size is large bottom screen
size than: upward projector
1) Badness Type: Keystone Badness
2) Adjustment Method:
The Engine Base front part raises at upper direction and
projection lens to be downward projector.
Bottom screen size a lot, fix the top/bottom screen size to
be same as.
(3) In case of
the upper screen size is
smaller
bottom screen
size than:
downward projector
1) Badness Type: Keystone Badness
2) Adjustment Method:
The Engine Base front part down at bottom direction
and projection lens to be upward projector.
Top screen size a lot, fix the top/bottom screen size to
be same as.
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