Service Manuals, User Guides, Schematic Diagrams or docs for : LG Plasma LG MZ-42PZ43V 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-02RA
MODEL : MT-42PZ40/V/B/R/S
MODEL : MT-42PZ41/V/B/R/S/VB
MODEL : MT/MZ-42PZ42/V/B/R/S
MODEL : MT/MZ-42PZ43/V/B/R/S/VS
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Jan., 2003
P/NO : 3828VD0129E Printed in Korea
CONTENTS
SAFETY PRECAUTIONS ...................................................................................3
DESCRIPTION OF CONTROLS ........................................................................ 4
SPECIFICATIONS .............................................................................................. 7
ADJUSTMENT INSTRUCTIONS ......................................................................10
BLOCK DIAGRAM .............................................................................................13
ASSEMBLY METHOD........................................................................................14
EXPLODED VIEW ..............................................................................................16
EXPLODED VIEW PARTS LIST ........................................................................17
REPLACEMENT PARTS LIST...........................................................................18
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 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
ON/ OFF
R AUDIO L Y PB PR R AUDIO L (MONO)
( )R( ) ( )L ( )
RS-232C INPUT RGB2 INPUT RGB1 INPUT AUDIO INPUT RGB1 OUTPUT REMOTE CONTROL AUDIO INPUT COMPONENT(480i/480p) S-VIDEO VIDEO INPUT AUDIO INPUT AC INPUT
EXTERNAL SPEAKER (CONTROL/SERVICE) (DIGITAL RGB INPUT) (PC INPUT) (PC OUTPUT) CONTROL LOCK (DVD INPUT)
RS-232C COMPONENT S-VIDEO AUDIO
RGB2 INPUT RGB AUDIO AUDIO INPUT INPUT INPUT
INPUT INPUT
(DIGITAL RGB1
RGB INPUT) INPUT COMPO-
(PC NENT(480i/480p) VIDEO INPUT
INPUT) (DVD INPUT)
Connection to PC Connection to AV equipment
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 -
RCA Type
ON/ OFF
R AUDIO L Y PB PR R AUDIO L (MONO)
( )R( ) ( )L ( )
RS-232C INPUT RGB2 INPUT RGB1 INPUT AUDIO INPUT RGB1 OUTPUT REMOTE CONTROL AUDIO INPUT COMPONENT(480i/480p) S-VIDEO VIDEO INPUT AUDIO INPUT AC INPUT
EXTERNAL SPEAKER (CONTROL/SERVICE) (DIGITAL RGB INPUT) (PC INPUT) (PC OUTPUT) CONTROL LOCK (DVD INPUT)
1 2 3 4 5 6
Scart Type
ON/ OFF
( )R( ) ( )L ( )
RS-232C INPUT RGB2 INPUT RGB1 INPUT AUDIO INPUT RGB1 OUTPUT REMOTE CONTROL AC INPUT
EXTERNAL SPEAKER (CONTROL/SERVICE) (DIGITAL RGB INPUT) (PC INPUT) (PC OUTPUT) CONTROL LOCK
5
AV1
1. EXTERNAL SPEAKER (8 ohm output) 4. CONTROL LOCK Switch
Connect to optional external speaker(s). REMOTE CONTROL
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