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CANADA : http//biz.lgservice.com
USA : http//www.lgservice.com
: http//biz.lgservice.com
PLASMA TV
SERVICE MANUAL
CHASSIS : PA-61A
MODEL : 50PC1DRA 50PC1DRA-UA
MODEL : 50PC1DR 50PC1DR-UA
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
- 2 -
TABLE OF CONTENTS
DESCRIPTION OF CONTROLS ...........................................4
SPECIFICATIONS.................................................................8
ADJUSTMENT INSTRUCTIONS ..........................................9
BLOCK DIAGRAM...............................................................17
EXPLODED VIEW...............................................................30
EXPLODED VIEW PARTS LIST .........................................31
REPLACEMENT PARTS LIST ............................................32
SCHEMATIC DIAGRAM..........................................................
PRINTED CIRCUIT BOARDS .................................................
- 3 -
DESCRIPTION OF CONTROLS
CONTROLS
This is a representation of the front panel of models 50PC1DR, 50PC1DRA series TVs.
Here shown may be some what different from your TV.
Front Panel Controls
TV
Remote POWER GUIDE INPUT MENU VOLUME CHANNEL
Control Sensor Button Button Button Button (F,G)Buttons (E,D)Buttons
Power Standby Indicator
Illuminates red in stand-
by mode.
When the TV is turned
on, the indicator blinks
white and then illumi-
nates white before the
picture is displayed.
- 4 -
DESCRIPTION OF CONTROLS
CONNECTION OPTIONS
This is the back panel of models 50PC1DR, 50PC1DRA series TVs.
Back Connection Panel
S-VIDEO Input
Cable CARD
Provides better picture quality
AV IN 2
than the video input.
AUDIO Input
CableCARDTM R
Connections are available for
Used for listening to stereo sound from
L/MONO
CableCARDTM an external device.
Cable
Service VIDEO Input
Provider. Connects the video signal from
a video device.
AV OUT RS-232C IN (CONTROL & SERVICE) PORT
Connect a second TV or monitor. Connect to the RS-232C port on a PC.
AV (Audio/Video) IN 1 ANTENNA IN
Connect audio/video output from an external Connect over-the air signals to this jack.
device to these jacks. CABLE IN
S-VIDEO Connect cable signals to this jack.
Connect S-Video out from an S-VIDEO device.
RGB/AUDIO IN
COMPONENT IN Connect the monitor output from a PC to the
Connect a component video/audio device to appropriate input port.
these jacks.
Remote Control Port
HDMI IN Connect your wired remote control.
Connect a HDMI signal to 1(DVI) or 2.
Power Cord Socket
Or DVI(VIDEO)signal to the 1(DVI) port
For operation with AC power.
with a DVI to HDMI cable.
Caution :
DIGITAL AUDIO OUT Never attempt to operate the TV on DC power.
Connect digital audio from various types of
equipment.
Note: In standby mode, these ports do not work.
- 5 -
DESCRIPTION OF CONTROLS
REMOTE CONTROL KEY FUNCTIONS
When using the remote control, aim it at the remote control sensor on the TV.
MODE Select the remote operating mode: TV, DVD, VCR,
AUDIO, CABLE or STB.
Use for DVR record or trick play.
mode control Controls the mode.
buttons
For further details, see the DVR section.
VCR/DVD Control video cassette recorders or DVD players.
buttons
Move the Listings Grid forward or backward in 24
DAY+/DAY-
hour increments.
MENU Displays the main menu. Enters or exits a Panel
Menu in the TV Guide On Screen system.
TV GUIDE Displays the TV Guide On Screen system.
Enter to the mode.
THUMBSTICK Navigate the on-screen menus and adjust the system
(Up/Down/Left settings to your preference. i
Right/ENTER)
EXIT Clear all on-screen displays and return to TV view-
ing from any menu.
REC LIST Display the thumbnail recorded list.
MARK Enter the selected functions.
INFO Display information at the top of the screen.
VOLUME UP Increase/decrease the sound level.
/DOWN
MUTE Switch the sound on or off.
Scroll through the programmed Favorite channels.
FAV
CHANNEL Select available channels.
UP/DOWN APM
PAGE UP/ Move from one full set of screen information CC AUTO DEMO M/C EJECT
PAGE DOWN to the next one.
NUMBER button
Tune to the last channel viewed.
FLASHBK
Used to enter a program number for multiple
-- (DASH) program channels such as 2-1, 2-2, etc.
- 6 -
DESCRIPTION OF CONTROLS
POWER Turns your TV or any other programmed equipment on or off, depending on the mode.
LIVE TV In AV 1-2, Component 1-2, RGB-DTV (or RGB-PC), HDMI1/DVI, and HDMI2 input sources, screen
returns to the last TV channel.
INPUT External input modes rotate in regular sequence: Antenna, Cable, AV1-2, Component 1-2, RGB-DTV
(or RGB-PC), HDMI1/DVI and HDMI2 (AV 1-2, Component 1-2, RGB-DTV (or RGB-PC), HDMI1/DVI,
and HDMI2 input sources are linked automatically, only if these are connected ).
Inside the Sliding Cover
PIP Switches the sub picture PIP, POP, Twin
picture or off mode.
PIPCH- Changes the PIP channel.
/PIPCH+
Select the connected input source for the
PIP INPUT sub-picture.
Exchange the main/sub images.
SWAP
Select MTS sound: Mono, Stereo, and
SAP SAP
analog mode. Change the audio language
DTV mode.
TIMER Select the amount of time EZ PIC Adjust the factory preset picture depend
before your TV turns off on the viewing environment.
automatically.
APM Compare the Daylight, Normal, Night
Time and User1(or2) on the screen.
RATIO Change the aspect ratio.
Select the appropriate type of sound for
Adjust the screen EZ SOUND
ADJUST position,size,and phase type of program.
in PC mode. CC Select closed caption.
(*In DTV/CADTV modes )
- 7 -
SPECIFICATIONS
50PC1DR / 50PC1DRA 42LB1DR / 42LB1DRA
MODELS ( 50PC1DR-UA / 50PC1DRA-UA ) ( 42LB1DR-UA / 42LB1DRA-UA )
With Stand: Width x Height
(51.3/1302.6)x(34.3/872)x(14/355.8) (46.3/1175.0)x(30.2/768)x(11.8/300)
x Depth (inches/mm)
Weight (pounds/kg) (117 / 53.1) (90.4 / 41)
Without Stand: Width x Height
(51.3/1302.6)x(31.9/810)x(4.3/108.7) (46.3/1175.0)x(26.4/670)x(5.7/143.8)
x Depth (inches/mm)
Weight (pounds/kg) (97.7 / 44.3) (71.4 / 32.4)
Resolution 1366 x 768 (Dot)
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 Impedance 75
Operating Temperature Range 32-104