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CANADA : http//biz.lgservice.com
USA : http//www.lgservice.com
: http//biz.lgservice.com
PLASMA TV
SERVICE MANUAL
CHASSIS :PA-73E
MODEL : 42PC5DC 42PC5DC-UC
MODEL : 42PC5D 42PC5D-UC
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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
TABLE OF CONTENTS
DESCRIPTION OF CONTROLS ...........................................4
SPECIFICATIONS.................................................................8
ADJUSTMENT INSTRUCTIONS ..........................................9
TROUBLESHOOTING GUIDE ............................................19
PRINTED CIRCUIT BOARDS .............................................24
BLOCK DIAGRAM...............................................................27
EXPLODED VIEW...............................................................32
EXPLODED VIEW PARTS LIST .........................................33
REPLACEMENT PARTS LIST ............................................34
SCHEMATIC DIAGRAM..........................................................
DESCRIPTION OF CONTROLS
FRONT PANEL INFORMATION
Here shown may be somewhat different from your TV.
Front Panel Controls
Plasma TV Model
Remote Control Sensor
Power Standby Indicator
Illuminates red in standby mode.
When the TV is turned on, the indica-
tor blinks green and then illuminates
green before the picture is displayed.
INPUT MENU ENTER VOL CH
INPUT MENU ENTER VOL CH
POWE
R INPUT MENU ENTER VOLUME CHANNEL
Button Button Button Button (F,G)Buttons (E,D)Buttons
DESCRIPTION OF CONTROLS
BACK PANEL INFORMATION
Back Connection Panel
Plasma TV Model
R
AV IN 2
S-VIDEO Input
S-VIDEO
Provides better picture quality than the video
input.
VIDEO L/MONO AUDIO R
AUDIO Input
11 VIDEO Input
Connects the video signal from a video device.
10 SERVICE 7
COMPONENT IN AV OUT AV IN 1
VIDEO AUDIO
RGB IN
(PC) 1
6
4
HDMI IN AUDIO IN REMOTE 8
(RGB/DVI) CONTROL IN
ANTENNA/ 2 2
CABLE IN
( )
1 OPTICAL
RS-232C IN DIGITAL AUDIO (MONO) 3
HDMI/DVI IN (CONTROL & SERVICE) OUT S-VIDEO VIDEO AUDIO
9 5
( )
( )
DESCRIPTION OF CONTROLS
REMOTE CONTROL FUNCTIONS
When using the remote control, aim it at the remote control sensor on the TV.
TV INPUT INPUT
MODE Select the remote's operating mode. Defaults to LG POWER
codes, refer to page 70 to reprogram.
DVD
TV VCR
MODE
VCR/DVD Control video cassette recorders or DVD players.
CABLE
control buttons AUDIO STB
MENU Displays the main menu.
BRIGHT -/ + Adjust the brightness on screen.
MENU BRIG
HT - HT +
BRIG
THUMBSTICK Navigate the on-screen menus and adjust the sys-
(Up/Down/Left
Right/ENTER) tem settings to your preference.
ENTER
EXIT Clear all on-screen displays and return to TV view-
ing from any menu.
EXIT INK
TIMER Select the amount of time before your TV turns off TIMER SIMPL
RATIO
automatically.
RATIO Change the aspect ratio.
VOL MUTE FAV CH
SIMPLINK C?
VOLUME UP Increase/decrease the sound level. 1 2 3
/DOWN
MUTE Switch the sound on or off. 4 5 6
FAV Scroll through the programmed Favorite channels. 7 8 9
0 BACK
CHANNEL Select available channels.
UP/DOWN
NUMBER but-
ton
-- (DASH) Used to enter a program number for multiple pro-
gram channels such as 2-1, 2-2, etc.
BACK Tune to the last channel viewed.
Illuminates the remote control
LIGHT buttons of selected mode.
DESCRIPTION OF CONTROLS
POWER Turns your TV or any other programmed equipment on or off, depending on the mode.
TV INPUT In AV 1-2, Component 1-2, RGB-PC, HDMI1/DVI, and HDMI2 input sources, screen
returns to the last TV channel.
INPUT External input modes rotate in regular sequence: TV, AV1-2, Component 1-2, RGB-PC,
HDMI1/DVI and HDMI2.
(AV 1-2, Component 1-2, RGB-PC, HDMI1/DVI, and HDMI2 input sources are linked
automatically, only if a device is connected.)
Inside the Sliding Cover
PICTURE Selects the factory preset picture depend
on the viewing environment.
1 2 3 SOUND Selects the factory preset sound for type of
program.
4 5 6
SAP Analog mode: Selects MTS sound (Mono,
7 8 9 Stereo, or a SAP)
DTV mode: Changes the audio language.
0 BACK CC Select a closed caption.
(*In DTV/CADTV mode )
PICTURE SOUND SAP CC
ADJUST Adjust the screen resolution, position, size
ADJUST and phase.
SPECIFICATIONS
42PC5D 50PC5D
MODELS
(42PC5D-UC) (50PC5D-UC)
Including stand 41.3 x 30.2 x 12.2 inches 48.9 x 34.9 x 14.6 inches
Dimensions 1048.0 x 766.0 x 310.0 mm 1242.0 x 887.6 x 370.0 mm
(Width x Height x Depth) Excluding stand 41.3 x 28.1 x 3.3 inches 48.9 x 32.6 x 3.5 inches
1048.0 x 713.0 x 83.5 mm 1242.0 x 827.2 x 88.0 mm
Weight including stand 60.8 pounds / 27.6 kg 86.6 pounds / 39.3 kg
excluding stand 53.4 pounds / 24.2 kg 76.3 pounds / 34.6 kg
Power requirement AC100-240V ~ 50/60Hz
Television System NTSC-M, ATSC, 64 & 256 QAM
Program Coverage VHF 2-13, UHF 14-69, CATV 1-135, DTV 2-69, CADTV 1-135
External Antenna 75 ohm
Impedance
Operating 32 ~ 104