Service Manuals, User Guides, Schematic Diagrams or docs for : LG Monitor LG_DU-42PY10XH_[SM]
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CANADA : http//biz.lgservice.com
USA : http//www.lgservice.com
: http//lgservice.com/techsup.html
PLASMA TV
SERVICE MANUAL
CHASSIS : AF-044P
MODEL : DU-42PY10X DU-42PY10XH
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
POWER TV GUIDE TV/VIDEO MENU VOL CH
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 Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
An lsolation Transformer should always be used during Do not use a line Isolation Transformer during this check.
the servicing of a receiver whose chassis is not isolated from Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
the AC power line. Use a transformer of adequate power rating between a known good earth ground (Water Pipe, Conduit, etc.)
as this protects the technician from accidents resulting in and the exposed metallic parts.
personal injury from electrical shocks. Measure the AC voltage across the resistor using AC
voltmeter with 1000 ohms/volt or more sensitivity.
It will also protect the receiver and it's components from being Reverse plug the AC cord into the AC outlet and repeat AC
damaged by accidental shorts of the circuitary that may be voltage measurements for each esposed metallic part. Any
inadvertently introduced during the service operation. voltage measured must not exceed 0.75 volt RMS which is
corresponds to 0.5mA.
If any fuse (or Fusible Resistor) in this monitor is blown, replace In case any measurement is out of the limits sepcified, there is
it with the same specified type. possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
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. Leakage Current Hot Check circuit
AC Volt-meter
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. Good Earth Ground
Place the AC switch in the on positioin, connect one lead of such as WATER PIPE,
ohm-meter to the AC plug prongs tied together and touch other To Instrument's CONDUIT etc.
ohm-meter lead in turn to each exposed metallic parts such as 0.15uF
exposed
antenna terminals, phone jacks, etc. METALLIC PARTS
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1M and 5.2M.
When the exposed metal has no return path to the chassis the 1.5 Kohm/10W
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
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
- 2 -
TABLE OF CONTENTS
DESCRIPTION OF CONTROLS ...........................................4
ADJUSTMENT INSTRUCTIONS ..........................................7
PRINTED CIRCUIT BOARDS .............................................17
BLOCK DIAGRAM...............................................................23
EXPLODED VIEW...............................................................24
EXPLODED VIEW PARTS LIST .........................................25
REPLACEMENT PARTS LIST ............................................26
SCHEMATIC DIAGRAM..........................................................
- 3 -
DESCRIPTION OF CONTROLS
Controls
- This is a simplified representation of front panel.
Here shown may be somewhat different from your TV.
Front Panel Controls
INDEX
R
Switches
TruSurround XT LED Display
on or off.
POWER TV GUIDE TV/VIDEO MENU VOL CH
POWER TV GUIDE TV/VIDEO MENU VOL CH
Remote Control
Sensor
Power Indicator
CHANNEL (E, D) Buttons Illuminates orange in stand-
POWER Button
by mode, Illuminates green
VOLUME (F,G) Buttons when the TV is turned on.
(If power isn't turn on in red,
MENU Button
contact your service center.)
TV/VIDEO Button
TV GUIDE Button
- 4 -
DESCRIPTION OF CONTROLS
Connection Options
Back Connection Panel
S-VIDEO Input
A connection available to provide bet-
ter picture quality than the video input.
S-VIDEO
VIDEO Input
FRONT A/V INPUT
Connects the video signal from a
VIDEO
video device.
L / MONO
AUDIO Input
R AUDIO
Use to connect to hear stereo sound
from an external device.
G-LINK Digital Audio (DVI: Digital IEEE1394
Connect an Visual Connect Remote Control Port
Interface/Component2) RS-232C DVHS or Connect your wired CABLE Inputs
IR controller
Input/ INPUT (CON- MicroMV to remote control here. Connect cable
to this jack.
Digital Audio Output TROL/SER- IEEE1394 CableCARD signals to the TV,
Connect digital audio from VICE) PORT Connector. Used for either directly or
various types of equipment. Connect to the CableCARD through your
Note: In standby mode, RS-232C port received Cable cable box.
these ports will not work. on a PC. Service Provider.
HDMI / DIGITAL AUDIO(OPTICAL)
DVI(VIDEO)
DVI COMPONENT2
AUDIO INPUT VIDEO INPUT Cable
ANTENNA CABLE
AC INPUT
DVD/DTV Input Antenna Inputs
(Component 1-2) Monitor Output Connect antenna sig-
Connect a component Connect a second nals to the TV, either
video/audio device to TV or Monitor. directly or through
these jacks. your cable box.
RGB/AUDIO Audio/Video Input S-Video Input
INPUT HDMI/DVI(VIDEO) Connect S-Video out
Connect audio/video
Connect the moni- Connect a from an S-VIDEO
output from an exter-
tor output connec- HDMI/DVI(Video) device to the S-
nal device to these
tor from a PC to signal to this jack. VIDEO input.
jacks. Power Cord Socket
the appropriate This TV operates on an AC power. The voltage is indi-
input port. cated on the Specifications page. Never attempt to oper-
ate the TV on DC power.
- 5 -
DESCRIPTION OF CONTROLS
Remote Control Key Functions
- When using the remote control, aim it at the remote control sensor on the TV.
LIGHT MODE
Illuminates the remote control buttons. Selects the remote operating mode: TV,
VCR, DVD, CABLE, HDSTB or AUDIO.
TV/VIDEO Select other operating modes, for the
Selects: DTV, Analog, Video, Front Video, remote to operate external devices.
Component 1-2, RGB-DTV (or RGB-PC), POWER
HDMI/DVI input sources. Turns your TV or any other programmed
MODE
COMP/RGB/HDMI LIGHT POWER
equipment on or off, depending on mode.
Selects: Component 1-2, RGB-DTV (or RGB- TV/VID
EO COMP/RGB/HDMI 1394
1394
PC), HDMI/DVI input sources.
FLASHBK
NUMBER buttons
Tunes to the last channel viewed.
DASH SURF
Used to enter a program number for multiple FLASHBK
Use to scroll the Surf channel.
program channels such as 2-1,2-2,etc.
CHANNEL UP/DOWN
MUTE MUTE SURF Selects available channels found with EZ
PGUP
Switches the sound on or off. VOL CH scan.
PGDN
VOLUME UP/DOWN PAGE UP/PAGE DOWN
Increases/decreases the sound level. SAP RATIO Moves from one full set of screen infor-
INFO CC mation to the next one.
INFO
When you watch the TV, displays information RATIO
on top of the screen. Not available in Changes the aspect ratio.
Component 1-2, RGB and HDMI/DVI mode. CC
ENTER
Select a closed caption:
SAP Off, CC1~4, Text1~4.
Selects MTS sound: Mono, Stereo, and SAP EXIT
in Analog mode. Change the audio language MENU EXIT
Clears all on-screen displays and returns to
TV GUIDE TIMER
in DTV mode. TV viewing from any menu.
THUMBSTICK (Up/Down/Left/Right/ENTER) PLAY PAUSE STOP RECORD
TIMER
Allows you to navigate the on-screen menus
REW FF Lets you select the amount of time before
and adjust the system settings to your pref- DAY - DAY +
your TV turns itself off automatically.
erence. SKIP
PIP PIPCH- PIPCH+ PIPINPUT VCR/DVD BUTTONS
MENU
Control some video cassette recorders or
Brings up the main menu to the screen. VIDEO SOUND SIGNAL SWAP
DVD player ("RECORD" button is not avail-
TV GUIDE ADJUST FREEZE ZOOM able for DVD player).
Brings up the TV Guide On Screen system to
DAY+/DAY-
the screen. Moves forward of backwards in 24 hour
VIDEO increments in the Listings Grid.
Adjusts the factory preset picture PIP
according to the room. Switches between PIP, POP (Picture-out-of-
ADJUST Picture) and Twin picture modes.
Adjusts screen position, clock, and PIPCH-/PIPCH+
phase in PC mode. Changes to next higher/lower PIP channel.
SOUND PIP INPUT
Selects the sound appropriate Selects the input source for the sub picture.
for the program's character.
SWAP
SIGNAL Exchanges the main/sub images in
Displays the digital signal strength. PIP/Twin picture mode.
FREEZE ZOOM
Freezes the currently-viewed picture. Main pic- Enlarges the main picture size.
ture is frozen in PIP/Twin picture mode.
- 6 -
ADJUSTMENT INSTRUCTIONS
1. Application Object 4. Gemstar VBI Micom Download
These instructions are applied to all of the PDP TV, AF-044P.
4-1. Preparation for Adjustment
(1) As shown below, connect the MPLAB ICD2 equipment, PC
and Digital Connector.
2. Notes (2) Turn on the MPLAB ICD2 POWER Supply.
(1) Because this is not a hot chassis, it is not necessary to use (3) After turn on the PC and MONITOR, select the `MPLAB
an isolation transformer. However, the use of isolation IDE' from the screen.
transformer will help protect test equipment.
(2) Adjustments must be done in the correct order.
(3) The adjustments must be performed in the circumstance of +13V
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