Service Manuals, User Guides, Schematic Diagrams or docs for : LG Plasma LG MZ-50PZ43 Plasma TV Service Manual
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website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html
PLASMA MONITOR
SERVICE MANUAL
CHASSIS : RF-02CA
MODEL : MT-50PZ40/41/41H/41V
MODEL : MT/MZ-50PZ43/43S/43V/43VS
MODEL : MZ-50PZ42/42S
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CH VOL OK
CONTENTS
SAFETY PRECAUTIONS ...................................................................................3
DISCRIPTION OF CONTROLS ......................................................................... 4
ADJUSTMENT INSTRUCTIONS ........................................................................8
BLOCK DIAGRAM .............................................................................................11
EXPLODED VIEW ..............................................................................................12
EXPLODED VIEW PARTS LIST ........................................................................13
REPLACEMENT PARTS LIST...........................................................................14
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 lsolation 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 circuitary that may be voltage measurements for each esposed 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 sepcified, 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 positioin, 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 -
CONTROLS DESCRIPTION
VOL MENU INPUT SELECT ON/OFF
INPUT SELECT button
Power standby indicator
Illuminates red in standby MENU button Main power button
mode. Illuminates green
VOLUME (F,G) buttons Remote control sensor
when the Monitor is turned
on D,E buttons
R AUDIO L (MONO) Y PB PR R AUDIO L ( )L ( )
( )R( )
AUDIO VIDEO COMPONENT(480i/480p) AUDIO RGB1 OUTPUT AUDIO RGB1 INPUT RGB2 INPUT RS-232C INPUT
EXTERNAL SPEAKER (8) AC INPUT INPUT INPUT S-VIDEO (DVD INPUT) INPUT (PC OUTPUT) INPUT (PC INPUT) (DIGITAL RGB INPUT) (CONTROL/SERVICE) EXTERNAL SPEAKER (8)
AUDIO INPUT RS-232C
VIDEO AUDIO INPUT RGB2 INPUT INPUT
S-VIDEO (DIGITAL
INPUT COMPONENT RGB INPUT)
INPUT RGB1 INPUT
(DVD INPUT)
(PC INPUT)
AUDIO INPUT
Connection to AV equipment Connection to PC
Note : All cables shown are not provided with the Monitor,
except : A D-sub 15 pin cable and DVI cable is supplied to connect the Monitor to a PC.
- 4 -
Socket Type
R AUDIO L (MONO) Y PB PR R AUDIO L
( )R( ) ( )L ( )
AUDIO VIDEO COMPONENT(480i/480p) AUDIO RGB1 OUTPUT AUDIO RGB1 INPUT RGB2 INPUT RS-232C INPUT
EXTERNAL SPEAKER (8) AC INPUT INPUT INPUT S-VIDEO (DVD INPUT) INPUT (PC OUTPUT) INPUT (PC INPUT) (DIGITAL RGB INPUT) (CONTROL/SERVICE) EXTERNAL SPEAKER (8)
1 2 3 4 5
Scart Type
( )R( ) ( )L ( )
RGB1 OUTPUT AUDIO RGB1 INPUT RGB2 INPUT RS-232C INPUT
EXTERNAL SPEAKER (8) AC INPUT (PC OUTPUT) INPUT (PC INPUT) (DIGITAL RGB INPUT) (CONTROL/SERVICE) EXTERNAL SPEAKER (8)
3 AV1
1. EXTERNAL SPEAKER (8 ohm output) 4. RGB1 OUTPUT(PC OUTPUT)/AUDIO IN SOCKETS
Connect this terminal to the optionally available speaker. You can watch the RGB1 signal in other monitor by con-
*For further information, refer to `Speaker & Speaker necting RGB1 OUTPUT(PC OUTPUT) to other monitor's
stand' manual. PC input jack.
Note : When you watch after connecting with other mon-
2. POWER INPUT SOCKET itor,
This Monitor operates on an AC mains supply, the voltage a. When you select RGB1 or RGB2 for main picture, you
is as indicated as inside back cover of this manual. Never can watch AV1, AV2 or S-Video for sub picture.
apply DC power to the Monitor. b. When you select AV1, AV2 or S-Video for main pic-
ture, You can watch main picture's viewing.
3. VIDEO/S-VIDEO/COMPONENT(DVD INPUT)/AUDIO
INPUT SOCKETS RGB1 INPUT(PC INPUT)/RGB2 INPUT(DIGITAL RGB
INPUT) IN SOCKETS
EURO SCART SOCKET Connect the monitor output socket of the PERSONAL
COMPUTER to this socket.
Note : The interface board(AP-50EA40/41) is not
equipped on MT/MZ-50PZ41/43 series models. Contact 5. RS-232C INPUT(CONTROL/SERVICE) SOCKET
your dealer for buying this optional item. Connect it to the RS-232C socket on the PC.
- 5 -
- When using the remote control aim it at the remote control sensor of the Monitor.
1. POWER
switches the set on from standby or off to standby.
2. SLEEP
sets the sleep timer.
3. PSM (Picture Status Memory)
recalls your preferred picture setting.
POWER
1 4. ARC (Aspect Ratio Control)
SLEEP INPUT SELECT changes the picture format.
2 13
PSM SSM 5. PIP
3 14 switches the sub picture on or off.
ARC PIP ARC
4 15 6. SWAP
PIP TWIN PICTURE
5 16 alternates between main and sub picture.
SWAP SUB INPUT
6 17 7. MENU Button
MENU MUTE
18 selects a menu.
7
8. D / E
selects a menu item.
OK
VOL VOL F / G (Volume Down/Up)
8 adjusts the volume.
adjusts menu settings.
OK
displays the current mode.
9. NUMBER BUTTONS
1 2 3
10. VCR BUTTONS
4 5 6
9 control a LG video cassette recorder.
7 8 9
11. WIN. SIZE
0 adjusts the sub picture size.
12. ZOOM-/ZOOM+
13. INPUT SELECT BUTTON
POWER STOP P/STILL selects TV, AV or PC monitor mode.
10 REW PLAY FF
14. SSM (Sound Status Memory)
REC recalls your preferred sound setting.
WIN.SIZE WIN.POSITION SPLIT ZOOM 19 15. PIP ARC
11
ZOOM - ZOOM +
20 changes the picture format of PIP.
12
16. TWIN PICTURE
17. SUB INPUT
selects the input mode for the sub picture.
18. MUTE Button
switches the sound on or off.
19. SPLIT ZOOM
enlarge the screen with regular ration.
20. WIN.POSITION
moves the sub picture to D / E or F / G direction.
- 6 -
Accessories POWER
SLEEP INPUT SELECT
PSM SSM
ARC PIP ARC
PIP TWIN PICTURE
SWAP SUB INPUT
MENU MUTE
VOL OK VOL
1 2 3
4 5 6
7 8 9
0
POWER STOP P/STILL
REW PLAY FF
LG TV REC
WIN.SIZE WIN.POSITION SPLIT ZOOM
1.5V
1.5V
ZOOM - ZOOM +
AS mark
Owner's Manual Remote control handset Alkaline batteries BNC-RCA adapter (optional)
D-sub 15 pin cable DVI cable Power cord Simple monitor stand
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 Speakers Desktop Speaker stand
Video cables PC audio cables
- 7 -
ADJUSTMENT INSTRUCTIONS
1. Application Object 4. MAX Bias Adjustment
These instructions are applied to all of the PDP monitor, RF-
02CA. (1) Input Full White (255 Gray) signal which generated from
Pattern Generator into CVBS and RGB1 Input part.
(2) Press POWER ON KEY on R/C for adjustment and select
MAX-BIAS
2. Notes (3) Press Vol. + key and operate TO SET
(1) Because this is not a hot chassis, it is not necessary to use (4) Original Full White screen will be presented about 1~2
an isolation transformer. However, the use of isolation seconds later. And if there is a mark of OK OSD, then the
transformer will help protect test instrument. Min-Bias adjustment will be completed.
(2) Adjustment must be done in the correct order. (5) After adjustment, press ◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo