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PLASMA TV
SERVICE MANUAL
CHASSIS : RF-03OB
MODEL : RT-50PZ60/70
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS
SAFETY PRECAUTIONS ...................................................................................3
DESCRIPTION OF CONTROLS ........................................................................ 4
SPECIFICATIONS .............................................................................................. 8
ADJUSTMENT INSTRUCTIONS ........................................................................9
PRINTED CIRCUIT BOARD ..............................................................................12
BLOCK DIAGRAM .............................................................................................18
EXPLODED VIEW ..............................................................................................20
EXPLODED VIEW PARTS LIST ........................................................................21
REPLACEMENT PARTS LIST...........................................................................22
SCHEMATIC DIAGRAM ........................................................................................
- 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
Displays the selected device. POWER
TV
switches the set on from standby or
VCR off to standby.
MODE DVD
Selects another device. CABLE ARC
STB Changes the picture format.
TV/AV AUDIO
Selects the TV, AV, Component, RGB
or DVI modes. MUTE
MODE Switches the sound on or off.
TV/AV POWER
MULTIMEDIA
Selects the Component, RGB or DVI ARC Q.VIEW
EDIA MUTE
modes. MULTIM
Returns to the previously viewed
NUMBER buttons programme.
1 2 3
FAVOURITE SSM
selects a favorite programme. 4 5 6 To select the sound appropriate to
your viewing programme character.
7 8 9
PSM FAVOURITE Q.VIEW
Adjusts the factory preset picture VOL +/- (Volume Up/Down)
according to the room. 0
Increases/decreases sound level.
PR +/- (Programme Up/Down)
MENU PSM SSM selects a programme.
Displays on screen menus one by one. VOL PR
Exits the current menu.
Memorizes menu changes. EXIT
Clears all on-screen displays and
PIP/DW TEXT returns to TV viewing from any
PIP/DW MENU EXIT menu.
Switches the sub picture on or off.
Selects PIP or DW modes.
PIP PR + /- TEXT
Selects a program for the sub picture. These buttons are used for teletext.
SWAP For further details, see the `Teletext'
Alternates between main and sub pic- OK section.
Note : In teletext mode, the PIP PR
ture. +/-, SWAP and PIP INPUT buttons are
PIP INPUT used for teletext function.
Selects the input mode for the sub pic-
ture. PIP PR- PIP INPUT OK
WIN.SIZE PIP PR+ SWAP
accepts your selection or displays the
Adjusts the sub picture size. current mode.
WIN.POSITION D / E or F / G
PLAY PAUSE STOP RECORD
Moves the sub picture to D / E or F / G Adjusts menu settings.
direction. Selects menu item.
PIP ARC REW FF SKIP
Changes the picture format for the DVD BUTTONS
sub picture. Controls a LG DVD player.
PIP ARC WIN.SIZE WIN.POSITION SLEEP
VCR BUTTONS ?
SLEEP
Controls a LG video cassette Sets the sleep timer.
I/II
recorder.
I/II
LIST LIST SPLIT ZOOM ZOOM- ZOOM+ Selects the language during dual lan-
Displays the program table. M guage broadcast.
Selects the sound output.
SPLIT ZOOM ZOOM+ / ZOOM-
Enlarge the screen with regular Enlarges or reduces the main picture
ration. size.
- 4 -
- Shown is a simplified representation of the set.
- Here shown may be somewhat different from your set.
AV4
S-VIDEO VIDEO L/MONO AUDIO R ON/OFF TV/AV MENU VOL PR
1 2 3 4 5 6 7 8
or
AV4
ON/OFF S-VIDEO VIDEO L/MONO AUDIO R TV/AV MENU VOL PR
3 1 2 4 5 6 7 8
1. AUDIO/VIDEO IN SOCKETS 6. F / G (Volume Up/Down) Buttons
S-VIDEO/AUDIO IN SOCKETS
7. D / E (Programme Up/Down) Buttons
2. Remote Control Sensor
8. Power Standby Indicator
3. Main Power Button Illuminates red in standby mode, Illuminates green when the
set is turned on
4. TV/AV Button
Selects the TV, AV, Component, RGB or DVI modes.If OSD is
displayed, selects menu item.
5. MENU Button
- 5 -
Location and Function of Controls
COMPONENT
Y PB PR
RS-232C INPUT REMOTE
R L
(CONTROL/SERVICE) CONTROL
L(MONO) R
Antenna RGB INPUT AUDIO INPUT DVI INPUT
AV1 AV2 VIDEO AUDIO S-VIDEO EXTERNAL SPEAKER AC INPUT
AV3
1 2 3 4 5 6 7
1. ANTENNA INPUT 5. RS-232C INPUT(CONTROL/SERVICE) PORT
Connect to the RS-232C port on a PC.
2. RGB INPUT / AUDIO INPUT / DVI INPUT
Connect the monitor output socket of the PERSONAL COM- 6. CONTROL LOCK / REMOTE CONTROL
PUTER to this socket.
7. EXTERNAL SPEAKER OUTPUT (8 ohms)
3. EURO SCART SOCKET Connect to optional external speaker(s).
Connect the euro scart socket of the VCR to these sockets. * For further information, refer to `Speaker & Speaker Stand'
manual.
4. COMPONENT INPUT
AUDIO/VIDEO IN SOCKETS (AV3)
Connect the audio/video out sockets of external equipment to
these 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 AV3.
- 6 -
Accessories
TV
VCR
DVD
CABLE
STB
AUDIO
MODE POWER
TV/AV
IA ARC MUTE
MULTIMED
1 2 3
4 5 6
7 8 9
FAVOURITE Q.VIEW
0
PSM SSM
VOL PR
PIP/DW TEXT
MENU EXIT
OK
PIP PR- PIP INPUT
LG TV
1.5V
PIP PR+ SWAP
PLAY PAUSE STOP RECORD
REW FF SKIP
1.5V
AS mark
PIP ARC WIN.SIZE WIN.POSITION SLEEP
?
I/II
LIST SPLIT ZOOM ZOOM- ZOOM+
M
Owner's Manual Alkaline batteries Remote Control handset
D-sub 15 pin cable Power Cord DVI-D Cable Phone scart cable (Optional)
Optional Extras
- Optional extras can be changed or modified for quality improvement without any notification new optional extras can be
added.
- Contract your dealer for buying these items.
Tilt wall mounting bracket Wall mounting bracket Ceiling mounting bracket
Desktop stand Desktop Speaker stand
Video cables Audio cables Speakers
- 7 -
SPECIFICATIONS
NOTE : Specifications and others are subject to change without notice for improvement.
V Scope
This specification can be applied to all model of 50"PDP TV related to RF-03OB Chassis.
Chassis Model Name Market Place Brand
RF-03OA RZ-50PZ60/70 EU LG
RT-50PZ60/70 N-EU LG
V Test Condition
1) Temperature : 25