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42PX3RVA-ZC Datasheet

PLASMA TV SERVICE MANUAL


42PX3RVA-ZC Datasheet Preview


website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
PLASMA TV
SERVICE MANUAL
CHASSIS : MF-056C
MODEL : 42PX3RVA
42PX3RVA-ZC
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
www.DataSheet.net/
TV/AV
MENU
OK
VOL
PR
Datasheet pdf - http://www.DataSheet4U.co.kr/
Page 1

CONTENTS
SAFETY PRECAUTIONS ...................................................................................3
DESCRIPTION OF CONTROLS .........................................................................4
SPECIFICATIONS ...............................................................................................9
ADJUSTMENT INSTRUCTIONS ......................................................................11
TROUBLE SHOOTING GUIDE ..........................................................................15
BLOCK DIAGRAM .............................................................................................24
EXPLODED VIEW ..............................................................................................26
EXPLODED VIEW PARTS LIST .................www..DataS.heet.ne.t/ ....................................................27
REPLACEMENT PARTS LIST...........................................................................28
SCHEMATIC DIAGRAM ........................................................................................
PRINTED CIRCUIT BOARD ..................................................................................
Datasheet pdf - http://www.DataSheet4U.co.kr/
Page 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
An isolation 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 circuitry 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 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 exposed 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 specified, 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
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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.
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
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.
To Instrument's
exposed
METALLIC PARTS
0.15uF
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
1.5 Kohm/10W
Datasheet pdf - http://www.DataSheet4U.co.kr/
Page 3

DESCRIPTION OF CONTROLS
Remote Control Key Functions
- 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
Switches the sound on or off.
MULTIMEDIA
Selects the Component, RGB or
HDMI modes.
switches the set on from standby.
TV/AV
Selects the TV, AV, Component, RGB
or HDMI modes.
switches the set on from standby.
LIST
Displays the programme table.
D / E (Programme Up/Down)
selects a programme or a menu item.
switches the set on from standby.
F / G (Volume Up/Down)
adjusts the volume.
adjusts menu settings.
OK
accepts your selection or displays the
current mode.
PSM
Adjusts the factory preset picture
according to the room.
Q.VIEW
Returns to the previously viewed pro-
gramme.
Note : This function works only when
Favourite programme is set to Off.
Otherwise each press of this button
will select a stored favorite pro-
gramme.
MUTE
POWER
TV/AV MULTIMEDIA I/II
LIST ARC MENU
PR
OK
VOL
VOL
PR
123
4
5
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6
789
PSM 0 SSM
Q.VIEW TEXT SLEEP
REVEAL
?
SIZE
MODE
M
MIX
UPDATE
TIME
HOLD
INDEX
i
POWER
switches the set on from standby or
off to standby.
I/II
Selects the language during dual lan-
guage broadcast.
Selects the sound output.
ARC
Changes the picture format.
MENU
Displays on screen menus one by
one.
Exits the current menu.
Memorizes menu changes.
NUMBER buttons
SSM
To select the sound appropriate to
your viewing programme character.
SLEEP
Sets the sleep timer.
TEXT
These buttons are used for teletext.
For further details, see the ‘Teletext’
section.
COLOURED BUTTONS
These buttons are used for teletext (only
TELETEXT models) or programme edit.
Datasheet pdf - http://www.DataSheet4U.co.kr/
Page 4
Part Number 42PX3RVA-ZC
Manufactur LG
Description PLASMA TV SERVICE MANUAL
Total Page 30 Pages
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