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PLASMA MONITOR
SERVICE MANUAL
CHASSIS : RF-052A
MODEL : 50PM1M/MA/MB
50PM1M/MA/MB-TA
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS
SAFETY PRECAUTIONS ....................................................................................3
DESCRIPTION OF CONTROLS ..........................................................................4
SPECIFICATIONS ................................................................................................9
ADJUSTMENT INSTRUCTIONS .......................................................................11
TROUBLE SHOOTING GUIDE ..........................................................................16
PRINTED CIRCUIT BOARD ..............................................................................25
BLOCK DIAGRAM .............................................................................................27
EXPLODED VIEW ..............................................................................................30
EXPLODED VIEW PARTS LIST ........................................................................31
REPLACEMENT PARTS LIST...........................................................................32
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) CONDUIT etc.
To Instrument's 0.15uF
With the instrument AC plug removed from AC source, 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
MUTE POWER
MUTE POWER
switches the sound on or off. switches the set on from standby or
off to standby.
MULTIMEDIA INPUT MULTIMEDIA I/II
selects the Component, RGB or I/II (option)
HDMI modes. selects the language during dual lan-
LIST/ ARC MENU guage broadcast.
INPUT selects the sound output.
MENU
LIST (option) displays on screen menus one by one.
displays the programme table. exits the current menu.
memorizes menu changes.
OK
VOL VOL
D /E ARC
Selects a menu option. changes the picture format.
F / G (Volume Up/Down)
Increases/decreases sound level.
Adjusts menu settings.
OK
1 2 3
accepts your selection or displays the
NUMBER buttons
current mode.
4 5 6
SSM
7 8 9 to select the sound appropriate to
your viewing programme character.
PSM 0 SSM
PSM
TEXT/ (option)
adjusts the factory preset picture
according to the room. SPLIT ZOOM TEXT/ SLEEP
*
These buttons are used for teletext.
For further details, see the `Teletext'
section.
REVEAL MODE COLOURED BUTTONS :
SPLIT ZOOM These buttons are used for teletext.
enlarge the screen with regular ?
ration. SIZE MIX
Q.VIEW (option)
Returns to the previously viewed UPDATE Q.VIEW TIME SLEEP
programme. sets the sleep timer.
Note : This function works only when
Favourite prog. is set to Off. HOLD INDEX
Otherwise each press of this button i
will select a stored favorite
programme.
- 4 -
42PM1MA/J series / 50PM1MA/J series
6
5
3 2
ON/OFF
4
1
1. Main Power Button 6. D / E
Selects a menu option.
2. Remote Control Sensor F / G (Volume Up/Down)
Increases/decreases sound level.
3. Power Standby Indicator Adjusts menu settings.
Illuminates red in standby mode, Illuminates green when the
set is turned on
4. INPUT SELECT Button
5. MENU
Displays on screen menus one by one.
Exits the current menu.
Memorizes menu changes.
- 5 -
AUDIO COMPONENT INPUT 2 MONITOR OUPUT
REMOTE RGB OUTPUT R L
CONTROL R L COMPONENT INPUT 1 A/V INPUT AC INPUT
Y PB PR R L R L (MONO) R L (MONO)
RS-232C INPUT HDMI/DVI
(CONTROL/SERVICE) (VIDEO) INPUT AUDIO INPUT RGB INPUT VARIABLE AUDIO OUT EXTERNAL SPEAKER
VIDEO AUDIO Antenna AUDIO VIDEO S-VIDEO AUDIO
Connection to PC Connection to AV equipment
- 6 -
RCA Type
AUDIO COMPONENT INPUT 2 MONITOR OUPUT
REMOTE RGB OUTPUT R L
CONTROL R L COMPONENT INPUT 1 A/V INPUT AC INPUT
Y PB PR R L R L (MONO) R L (MONO)
RS-232C INPUT HDMI/DVI
(CONTROL/SERVICE) (VIDEO) INPUT AUDIO INPUT RGB INPUT VARIABLE AUDIO OUT EXTERNAL SPEAKER
VIDEO AUDIO Antenna AUDIO VIDEO S-VIDEO AUDIO
1 2 3 4 5
Scart Type
VIDEO AUDIO
AUDIO
REMOTE RGB OUTPUT R L Y PB PR L R
CONTROL R L COMPONENT INPUT AC INPUT
(MONO) AV3 AV1 AV2
RS-232C INPUT HDMI/DVI
(CONTROL/SERVICE) (VIDEO) INPUT AUDIO INPUT RGB INPUT VARIABLE AUDIO OUT EXTERNAL SPEAKER
S-VIDEO VIDEO Antenna
AV1
4
1. RS-232C INPUT(CONTROL/SERVICE) PORT 4. COMPONENT / AUDIO INPUT SOCKETS
Connect to the RS-232C port on a PC. S-VIDEO / AUDIO (L/MONO) INPUT SOCKETS
VIDEO / AUDIO (L/MONO) INPUT SOCKETS
2. HDMI/DVI (VIDEO) / AUDIO INPUT / RGB INPUT SOCKETS
Connect the monitor output socket of the PERSONAL COM- ANTENNA INPUT
PUTER to this socket.
Note: If you want to use RGB/DVI audio, we strongly recom- EURO SCART SOCKET
mend that you use the cable that has a core, or the EMI Filter Connect the euro scart socket of the VCR to these sockets.
core along with separate cable. Note:
a. If you want to use the EURO scart cable, you have to use
RGB OUTPUT SOCKET the signal shielded Euro scart cable.
You can watch the RGB signal on another set, connect RGB b. If you want to use your external hi-fi stereo system, turn off
OUTPUT to another monitor's PC input port. the internal speakers of the set.
REMOTE CONTROL 5. POWER CORD SOCKET
This set operates on an AC power. The voltage is indicated on
VARIABLE AUDIO OUTPUT the Specifications page. Never attempt to operate the set on
DC power.
3. EXTERNAL SPEAKER OUTPUT (8 ohm)
Connect to optional external speaker(s).
* For further information, refer to `Speaker & Speaker Stand'
manual.
- 7 -
Accessories
MUTE POWER
INPUT MULTIMEDIA I/II
LIST/ ARC MENU
OK
VOL VOL
1 2 3
4 5 6
7 8 9
PSM 0 SSM
SPLIT ZOOM TEXT/ SLEEP
REVEAL MODE
?
SIZE MIX
LG TV UPDATE Q.VIEW TIME
HOLD INDEX
i
AS mark
Owner's Manual Remote Control handset
1.5V
1.5V
Alkaline batteries
Power Cord
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.
42
40
40
42
50
50 42 40 40 42 50
Tilt wall mounting bracket Desktop stand Ceiling mounting bracket
Speakers Video cables Audio cables
- 8 -
SPECIFICATIONS
NOTE : Specifications and others are subject to change without notice for improvement.
V Application Range
This spec is applied to the PDP TV used RF-052A Chassis.
V Specification
Each part is tested as below without special appointment.
1) Temperature : 25