Service Manuals, User Guides, Schematic Diagrams or docs for : LG Plasma LG 42PX2RVA Chassis MF056C Plasma TV SM
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website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
PLASMA TV
SERVICE MANUAL
CHASSIS : MF-056C
MODEL : 42PX2RVA
42PX2RVA-ZC
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS
SAFETY PRECAUTIONS ...................................................................................3
DESCRIPTION OF CONTROLS .........................................................................4
SPECIFICATIONS ...............................................................................................8
ADJUSTMENT INSTRUCTIONS ......................................................................10
TROUBLE SHOOTING GUIDE ..........................................................................14
BLOCK DIAGRAM .............................................................................................23
EXPLODED VIEW ..............................................................................................24
EXPLODED VIEW PARTS LIST ........................................................................25
REPLACEMENT PARTS LIST...........................................................................26
SCHEMATIC DIAGRAM ........................................................................................
PRINTED CIRCUIT BOARD ..................................................................................
- 2 -
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 isolation 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 circuitry that may be voltage measurements for each exposed 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 specified, there is
it with the specified. 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
Due to high vacuum and large surface area of picture tube,
AC Volt-meter
extreme care should be used in handling the Picture Tube.
Do not lift the Picture tube by it's Neck.
Good Earth Ground
such as WATER PIPE,
Leakage Current Cold Check(Antenna Cold Check) To Instrument's CONDUIT etc.
With the instrument AC plug removed from AC source, 0.15uF
exposed
connect an electrical jumper across the two AC plug prongs. METALLIC PARTS
Place the AC switch in the on position, 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 1.5 Kohm/10W
antenna terminals, phone jacks, etc.
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
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
- 3 -
DESCRIPTION OF CONTROLS
- When using the remote control aim it at the remote control sensor of the set.
- There's maybe a defect in consecutive operation of remote control in specified brightness according to this set feature.
MUTE POWER
Switches the sound on or off. switches the set on from standby or
off to standby.
MULTIMEDIA MUTE POWER
Selects the Component, RGB or I/II
HDMI modes. Selects the language during dual lan-
switches the set on from standby. guage broadcast.
TV/AV MULTIMEDIA I/II
Selects the sound output.
TV/AV
Selects the TV, AV, Component, RGB ARC
LIST ARC MENU Changes the picture format.
or HDMI modes.
switches the set on from standby.
MENU
LIST Displays on screen menus one by
Displays the programme table. one.
Exits the current menu.
PR Memorizes menu changes.
D / E (Programme Up/Down) OK
selects a programme or a menu item. VOL VOL
switches the set on from standby.
PR
F / G (Volume Up/Down)
adjusts the volume.
adjusts menu settings. NUMBER buttons
OK
accepts your selection or displays the 1 2 3
current mode.
SSM
4 5 6 To select the sound appropriate to
your viewing programme character.
PSM 7 8 9
Adjusts the factory preset picture
according to the room.
PSM 0 SSM SLEEP
Q.VIEW Sets the sleep timer.
Returns to the previously viewed pro- Q.VIEW TEXT SLEEP
gramme.
Note : This function works only when TEXT
Favourite programme is set to Off. REVEAL MODE These buttons are used for teletext.
Otherwise each press of this button ? M For further details, see the `Teletext'
will select a stored favorite pro- section.
SIZE MIX
gramme.
UPDATE TIME COLOURED BUTTONS
These buttons are used for teletext (only
TELETEXT models) or programme edit.
HOLD INDEX
i
- 4 -
ON/OFF
TV/AV MENU VOL PR
Main Power Button MENU
Displays on screen menus one by one.
Remote Control Sensor Exits the current menu.
Memorizes menu changes.
Power Standby Indicator D / E (Programme Up/Down)
Illuminates red in standby TV/AV Button selects a programme or a menu item.
mode, Illuminates green Selects the TV, AV, Component, switches the set on from standby.
when the set is turned on RGB or DVI modes. If OSD is dis- F / G (Volume Up/Down)
played, selects menu item. adjusts the volume.
adjusts menu settings.
- 5 -
AV5
S-VIDEO
VIDEO
9
R AUDIO L/MONO
COMPONENT AUDIO
L R
AC INPUT
L (MONO) R
S-VIDEO VIDEO AUDIO AV1
Antenna
HDMI AUDIO INPUT RGB INPUT AV4 AUDIO
L R
AV2
VARIABLE
VARIABLE
AUDIO OUT
REMOTE RS-232C INPUT
CONTROL (CONTROL/SERVICE)
AV3
1 2 3 4 5 6 7 8
1. HDMI(DVI VIDEO) / AUDIO INPUT / RGB INPUT 5. VARIABLE AUDIO OUTPUT
Connect the monitor output socket of the PERSONAL COM-
PUTER, DVD or STB to this socket. 6. EURO SCART SOCKET
Note: If you want to use RGB/DVI audio, we strongly recom- Connect the euro scart socket of the VCR to these sockets.
mend that you use the cable that has a core, or the EMI Filter Note:
core along with separate cable. a. If you want to use the EURO scart cable, you have to use
the signal shielded Euro scart cable.
2. REMOTE CONTROL b. If the S-VIDEO(Y/C) signal is received through the Euro scart
socket 2 (AV 2), you must change to the S-Video 2 (Y/C) mode.
3. RS-232C INPUT(CONTROL/SERVICE) PORT
Connect to the RS-232C port on a PC. 7. ANTENNA INPUT
4. COMPONENT INPUT 8. POWER CORD SOCKET
Connect DVD video outputs to Y, PB, PR of COMPONENT This set operates on an AC power. The voltage is indicated on
INPUT and audio outputs to Audio sockets of AUDIO INPUT. the Specifications page. Never attempt to operate the set on
DC power.
AUDIO/VIDEO IN SOCKETS (AV4)
Connect the audio/video out sockets of external equipment to
these sockets. 9. AUDIO/VIDEO INPUT (AV5)
S-VIDEO/AUDIO IN SOCKETS S-VIDEO/AUDIO IN SOCKETS
Connect the S-VIDEO out socket of an VCR to the S-VIDEO
socket.
Connect the audio out sockets of the VCR to the audio sock-
ets as in AV4.
- 6 -
Accessories
Accessories
MUTE POWER
TV/AV MULTIMEDIA I/II
LIST ARC MENU
PR
OK
VOL VOL
PR
1 2 3
4 5 6
7 8 9
PSM 0 SSM
Q.VIEW TEXT SLEEP
REVEAL MODE
? M
SIZE MIX
LG TV UPDATE TIME
HOLD INDEX
i
AS mark
Owner's Manual Remote Control handset 2-Eye Bolts
1.5V
1.5V
Alkaline batteries Power Cord 2-Wall brackets
Joinning the set assembly to the wall to protect the set tumbling
- Secure the set assembly by joinning it to a wall by using the Eye Bolts/Wall brackets.
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