Text preview for : LG MZ-50PZ46 Plasma TV Service Manual.zip part of LG MZ-50PZ46 Plasma TV Service Manual LG Plasma LG MZ-50PZ46 Plasma TV Service Manual.zip
Back to : LG MZ-50PZ46 Plasma TV Se | Home
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
PLASMA MONITOR/TUNER
SERVICE MANUAL
CHASSIS : RF-03FB
MODEL : RT/MT-50PZ44/H/B/R/S
MODEL : RT/MT/MZ-50PZ46/H/B/R/S
MODEL : RT/MT-50PZ45V/45M/B/R/S
MODEL : RT/MT/MZ-50PZ47M/47V/B/R/S
MODEL : RT/RZ-BA50
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS
SAFETY PRECAUTIONS ...................................................................................3
DESCRIPTION OF CONTROLS ........................................................................ 4
SPECIFICATIONS ............................................................................................ 12
ADJUSTMENT INSTRUCTIONS ......................................................................21
BLOCK DIAGRAM .............................................................................................24
ASSEMBLY METHOD........................................................................................25
PRINTED CIRCUIT BOARD ..............................................................................26
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) 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
INPUT
ON/OFF SELECT MENU VOL.
Main Power Button D,E Buttons
INPUT SELECT Button
Remote Control Sensor VOLUME (F,G) Buttons
MENU Button Power Standby Indicator
Illuminates red in standby mode,
Illuminates green when the
Monitor is turned on
R AUDIO L Y PB PR R AUDIO L (MONO)
( )R( ) ( )L ( ) REMOTE
EXPANDED CONTROL
RS-232C INPUT DVI INPUT RGB INPUT AUDIO INPUT RGB OUTPUT AUDIO INPUT COMPONENT INPUT S-VIDEO VIDEO AUDIO INPUT AC INPUT
EXTERNAL SPEAKER (CONTROL/SERVICE) INPUT INPUT
RS-232C AUDIO AUDIO S-VIDEO AUDIO
INPUT INPUT INPUT INPUT INPUT
DVI INPUT
RGB EXPANDED
INPUT COMPO- VIDEO
RGB INPUT OUTPUT NENT INPUT INPUT
Connection to PC Connection to AV equipment
Note: The connection cables shown above to the right are not included with the Monitor.
A D-sub 15-pin cable and a DVI cable are provided to connect the Monitor to a PC.
- 4 -
RT-BA50
DC IN ANT IN AV(EXPANDED) INPUT AV OUTPUT REMOTE
(DC 12V) +75 CONTROL EXPANDED OUTPUT
R AUDIO L (MONO) VIDEO R AUDIO L VIDEO
EXPANDED
OUTPUT
DC IN AV(EXPAND AV OUT- REMOTE
(DC 12V) ED) INPUT PUT CONTROL
ANTENA INPUT
RZ-BA50
REMOTE DC IN ANT IN
CONTROL (DC 12V) +75 AV1(EXPANDED) AV2(EXPANDED) EXPANDED OUTPUT
AV1/2 (EXPAND-
ED) INPUT
RCA Type
R AUDIO L Y PB PR R AUDIO L (MONO)
( )R( ) ( )L ( ) REMOTE
CONTROL
RS-232C INPUT DVI INPUT RGB INPUT AUDIO INPUT RGB OUTPUT EXPANDED AUDIO INPUT COMPONENT INPUT S-VIDEO VIDEO AUDIO INPUT AC INPUT
EXTERNAL SPEAKER (CONTROL/SERVICE) INPUT INPUT
EXTERNAL DVI INPUT/RGB AUDIO INPUT/COMPONENT INPUT /
SPEAKER (8 INPUT/AUDIO INPUT / REMOTE CONTROL / S-VIDEO/VIDEO
ohm output) RGB OUTPUT INPUT/AUDIO INPUT
RS-232C INPUT EXPANDED INPUT POWER CORD
(CONTROL/SE SOCKET
RVICE) PORT
Scart Type
( )R( ) ( )L ( )
RS-232C INPUT DVI INPUT RGB INPUT AUDIO INPUT RGB OUTPUT EXPANDED AC INPUT
EXTERNAL SPEAKER (CONTROL/SERVICE) INPUT
EURO SCART SOCKET
- 5 -
- This function works only when the PDP Tuner is installed on the LG plasma display monitor.
Installing PDP Tuner on the Monitor
1. Turn the monitor off and disconnect the mains plug.
2. Carefully place the Monitor screen side down on a cushioned surface that will protect the monitor screen from
damage.
3. Mount the PDP Tuner gently into the correct position. Make sure it is inserted correctly.
4. Tighten the screws.
5. Connent the EXPANDED OUTPUT socket the on the PDP Tuner to the EXPANDED INPUT socket on the
Monitor.
6. Turn the monitor on.
Antenna Connection
- Connect the Plasma Display with various external equipments after connecting the Monitor with the PDP
Tuner and the Speakers.
1. Connect the RF out socket of the VCR to the aerial socket on the
back of the monitor.
2. Connect the aerial cable to the RF aerial in socket of the VCR.
3. Store the VCR channel on the programme number 0 using the DC IN
(DC 12V)
ANT IN
+75
AV(EXPANDED) INPUT AV OUTPUT REMOTE
CONTROL EXPANDED OUTPUT
`Manual programme tuning' section. R AUDIO L (MONO) VIDEO R AUDIO L VIDEO
4. Select the programme number where the VCR channel is stored.
5. Press the PLAY button on the VCR.
< Back panel of the PDP Tuner >
VCR
Monitor Out Setup
The PDP Tuner has a special signal output capability which allows you to hook up a second TV or monitor.
Just connect the second TV or monitor to the AV OUTPUT socket on the PDP Tuner. See the Operating Manual
of the second TV or monitor for further details regarding that device's input settings.
< Back panel of the PDP Tuner > or < Back panel of the PDP Tuner >
ANT OUT ANT OUT
DC IN ANT IN AV(EXPANDED) INPUT AV OUTPUT REMOTE REMOTE DC IN ANT IN
(DC 12V) +75 CONTROL EXPANDED OUTPUT CONTROL (DC 12V) +75 AV1(EXPANDED) AV2(EXPANDED) EXPANDED OUTPUT
R AUDIO L (MONO) VIDEO R AUDIO L VIDEO
S-VIDEO S-VIDEO
ANT IN OUT ANT IN OUT
(R) AUDIO (L) VIDEO (R) AUDIO (L) VIDEO
IN IN
RZ-BA50 RT-BA50
Monitor OUT Monitor OUT
Input Mode Input Mode
(AV2(EXP.)) (AV(EXP.))
TV, AV, AV1(EXP.) TV, AV(EXP.), AV or S-
Normal Main Picture Normal Main Picture
or S-Video Video
Main RGB, DVI or Main RGB, DVI or
Picture Component Picture Component
Sub Picture Sub Picture
Sub Sub
TV or AV1(EXP.) TV, AV(EXP.)
PIP/DW Picture PIP/DW Picture
TV, AV,
Main Main TV, AV(EXP.),
AV1(EXP.) or Main Picture Main Picture
Picture Picture AV or S-Video
S-Video
- 6 -
Watching VCR
- When connecting the Monitor to external equipment, match the colours of connecting ports (Video - yellow, Audio (L) - white,
Audio (R) -red).
- Connect the VIDEO INPUT socket (yellow) with the BNC-RCA adaptor to the VIDEO INPUT on the Monitor.
- If you have a mono VCR, connect the audio cable from the VCR to the AUDIO (L/MONO) input on the Monitor.
- If you connect an S-VIDEO VCR to the S-VIDEO input, the picture quality is improved; compared to connecting a regular VCR
to the Video input.
Or, connect the Euro scart socket of the VCR to the Euro scart socket of the monitor.
- Use the orbiter function to Avoid having a fixed image remain on the screen for a long period of time. Typically a frozen still pic-
ture from a VCR.
If a 4:3 picture format is used; the fixed image may remain visible on the screen.
- To avoid picture noise (interference), leave an adequate distance between the VCR and Monitor.
Watching TV programmes
- Turn the Plasma Display on and select the programme you DC IN
(DC 12V)
ANT IN
+75
AV(EXPANDED) INPUT AV OUTPUT REMOTE
CONTROL EXPANDED OUTPUT
want. R AUDIO L (MONO) VIDEO R AUDIO L VIDEO
Watching VCR
1. Use the INPUT SELECT button on the remote control to select
AV (AV1 or AV2) or AV(EXP.) (AV1(EXP.) or AV2(EXP.)). < Back panel of
- If both S-VIDEO and VIDEO sockets have been connected to the PDP Tuner >
the S-VHS VCR simultaneously, only the S-VIDEO can be
received.
- If connected to S-VIDEO, select the S-Video external input
S-VIDEO
source. OUT
(R) AUDIO (L) VIDEO
2. Insert a video tape into the VCR and press the PLAY button on
IN
the VCR. (See VCR owner's manual)
< VCR >
Watching Cable TV
- After subscribing for a local cable TV station and installing a converter you can watch cable TV.
- For further information of cable TV, contact the local cable TV station.
In using connection 1
DC IN
(DC 12V)
ANT IN
+75
AV(EXPANDED) INPUT AV OUTPUT REMOTE
CONTROL EXPANDED OUTPUT
1. Select programme number in programme switch of
R AUDIO L (MONO) VIDEO R AUDIO L VIDEO cable box.
2. Match the Plasma Display programme with selected
programme of cable box.
3. Select your desired programme with the remote
< Back panel of the PDP Tuner > control for cable box.
1 In using connection 2
2
1. Use the INPUT SELECT button on the remote con-
For cable TV trol and select AV (AV1 or AV2) or AV(EXP.)
(AV1(EXP.) or AV2(EXP.)).
2. Tune to cable service provided channels using the
(R) AUDIO (L) VIDEO (R) AUDIO (L) VIDEO
TV TV
cable box.
VCR RF Cable VCR RF Cable
< Cable Box >
- 7 -
Watching external AV source
DC IN ANT IN AV(EXPANDED) INPUT AV OUTPUT REMOTE
(DC 12V) +75 CONTROL EXPANDED OUTPUT
- When connecting the monitor to an external source, match the colours of R AUDIO L (MONO) VIDEO R AUDIO L VIDEO
AUDIO/VIDEO input jacks on the monitor with the output jacks on the
audio/video equipment: Video = yellow, Audio (Left) = white, Audio
(Right) = red.
Or, connect the Euro scart socket of the VCR to the Euro scart socket of < Back panel of the PDP Tuner >
the monitor.
How to use
1. Use the INPUT SELECT button on the remote control to select AV
(AV1 or AV2) or AV(EXP.) (AV1(EXP.) or AV2(EXP.)).
2. Operate the corresponding external equipment. See external equip- Camcorder
ment operating guide.
R AUDIO L VIDEO
Video game set
< Back of the external equipment >
Watching DVD
How to connect
< Back panel of the PDP Tuner >
Connect DVD video inputs to Y, PB, PR of COMPONENT INPUT
DC IN
(DC 12V)
ANT IN
+75
AV(EXPANDED) INPUT AV OUTPUT REMOTE
CONTROL EXPANDED OUTPUT and audio inputs to Audio sockets of AUDIO INPUT.
R AUDIO L (MONO) VIDEO R AUDIO L VIDEO
Or, connect the Euro scart socket of the VCR to the Euro scart
socket of the set.
How to use
1. Turn on the DVD player, and insert a DVD.
2. Use INPUT SELECT button on the remote control to select
Component or (AV1 or AV2) or (AV1(EXP.) or AV2(EXP.)).
Refer to the DVD player's manual for operating instructions.
R AUDIO L Y PB PR
REMOTE R AUDIO L (MONO)