Service Manuals, User Guides, Schematic Diagrams or docs for : LG Monitor LG_MF02HA_MW30LZ10_[SM]

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LG_MF02HA_MW30LZ10_[SM]


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                                                                                          website:http://biz.LGservice.com
                                                                          e-mail:http://www.LGEservice.com/techsup.html




                                        LCD MONITOR
                                        SERVICE MANUAL
                                        CHASSIS : MF-02HA

                                        MODEL : MW-30LZ10
                                        CAUTION
                                        BEFORE SERVICING THE CHASSIS,
                                        READ THE SAFETY PRECAUTIONS IN THIS MANUAL.




                          Aug., 2002
P/NO : 3828VD0120B   Printed in Korea
                                           CONTENTS




Contents .................................................................................................. 2

Safety Precautions ..................................................................................3

Adjustment Instruction ............................................................................4

Troubleshooting .......................................................................................6

Printed Circuit Board ...............................................................................7

Block Diagram.........................................................................................11

Exploded View ...................................................................................... 16

Exploded View Parts List .......................................................................17

Replacement Parts List ........................................................................ 18

SVC. Sheet .................................................................................................




                                                  - 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 Cold Check(Antenna Cold Check)
                                                                    With the instrument AC plug removed from AC source,
An lsolation Transformer should always be used during               connect an electrical jumper across the two AC plug prongs.
the servicing of a receiver whose chassis is not isolated from      Place the AC switch in the on positioin, connect one lead of
the AC power line. Use a transformer of adequate power rating       ohm-meter to the AC plug prongs tied together and touch other
as this protects the technician from accidents resulting in         ohm-meter lead in turn to each exposed metallic parts such as
personal injury from electrical shocks.                             antenna terminals, phone jacks, etc.
                                                                    If the exposed metallic part has a return path to the chassis, the
It will also protect the receiver and it's components from being    measured resistance should be between 1M and 5.2M.
damaged by accidental shorts of the circuitary that may be          When the exposed metal has no return path to the chassis the
inadvertently introduced during the service operation.              reading must be infinite.
                                                                    An other abnormality exists that must be corrected before the
If any fuse (or Fusible Resistor) in this TV receiver is blown,     receiver is returned to the customer.
replace it with the specified.
                                                                    Leakage Current Hot Check (See below Figure)
When replacing a high wattage resistor (Oxide Metal Film            Plug the AC cord directly into the AC outlet.
Resistor, over 1W), keep the resistor 10mm away from PCB.           Do not use a line Isolation Transformer during this check.
                                                                    Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
Keep wires away from high voltage or high temperature parts.        between a known good earth ground (Water Pipe, Conduit, etc.)
                                                                    and the exposed metallic parts.
Due to high vacuum and large surface area of picture tube,          Measure the AC voltage across the resistor using AC
extreme care should be used in handling the Picture Tube.           voltmeter with 1000 ohms/volt or more sensitivity.
Do not lift the Picture tube by it's Neck.                          Reverse plug the AC cord into the AC outlet and repeat AC
                                                                    voltage measurements for each esposed metallic part. Any
Before returning the receiver to the customer,                      voltage measured must not exceed 0.75 volt RMS which is
                                                                    corresponds to 0.5mA.
always perform an AC leakage current check on the exposed           In case any measurement is out of the limits sepcified, there is
metallic parts of the cabinet, such as antennas, terminals, etc.,   possibility of shock hazard and the set must be checked and
to be sure the set is safe to operate without damage of             repaired before it is returned to the customer.
electrical shock.
                                                                    Leakage Current Hot Check circuit

                                                                                           AC Volt-meter




                                                                                                               Good Earth Ground
                                                                                                               such as WATER PIPE,
                                                                       To Instrument's                         CONDUIT etc.
                                                                                                 0.15uF
                                                                       exposed
                                                                       METALLIC PARTS


                                                                                             1.5 Kohm/10W




                                                               - 3 -
                                      ADJUSTMENT INSTRUCTION

1. Application Object                                                  3-2. EDID (The Extended Display
  These instructions are applied to all of the MODELS of LCD                Identification Data) Adjustment
  MONITOR, MF-02HA.                                                         (1) This is the function that is made for the realization of "Plug
                                                                               and Play" which makes possible to use the user
                                                                               environment right after reorganization by communicating
                                                                               with monitor automatically.
2. Notes
  (1) Because this is not a hot chassis, it is not necessary to use         (2) EDID DATA for DVI of MF-02HA
     an isolation transformer. However, the use of isolation
     transformer will help protect test instrument.                            EDID table =
  (2) Adjustment must be done in the correct order. But, it can                  00 01 02 03 04 05 06 07 08 09
     be changed in consideration of mass production.                             _________________________________
  (3) The adjustment must be performed in the circumstance of                  000 | 00 FF FF FF FF FF FF 00 1E 6D
     25



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