Service Manuals, User Guides, Schematic Diagrams or docs for : LG Monitor LG_LB01M_32LV3500-TG_[SM]

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                                                                   Internal Use Only
                                            North/Latin America   http://aic.lgservice.com
                                            Europe/Africa         http://eic.lgservice.com
                                            Asia/Oceania          http://biz.lgservice.com




            LED LCD TV
            SERVICE MANUAL
            CHASSIS : LB01M

            MODEL : 32LV3500/350Y/3530
                                  32LV3500/350Y-TG          32LV3530-TK
            CAUTION
            BEFORE SERVICING THE CHASSIS,
            READ THE SAFETY PRECAUTIONS IN THIS MANUAL.




P/NO : MFL67002730 (1110-REV00)                                          Printed in Korea
                                              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 Exploded View.
 It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
 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 the
servicing of a receiver whose chassis is not isolated from the AC        Do not use a line Isolation Transformer during this check.
power line. Use a transformer of adequate power rating as this           Connect 1.5 K / 10 watt resistor in parallel with a 0.15 uF capacitor
protects the technician from accidents resulting in personal injury      between a known good earth ground (Water Pipe, Conduit, etc.)
from electrical shocks.                                                  and the exposed metallic parts.
                                                                         Measure the AC voltage across the resistor using AC voltmeter
It will also protect the receiver and it's components from being         with 1000 ohms/volt or more sensitivity.
damaged by accidental shorts of the circuitry that may be                Reverse plug the AC cord into the AC outlet and repeat AC voltage
inadvertently introduced during the service operation.                   measurements for each exposed metallic part. Any voltage
                                                                         measured must not exceed 0.75 volt RMS which is corresponds to
If any fuse(or Fusible Resistor) in this TV receiver is blown, replace   0.5 mA.
it with the specified.                                                   In case any measurement is out of the limits specified, there is
                                                                         possibility of shock hazard and the set must be checked and
When replacing a high wattage resistor (Oxide Metal Film Resistor,       repaired before it is returned to the customer.
over 1 W), keep the resistor 10mm away from PCB.
                                                                         Leakage Current Hot Check circuit
Keep wires away from high voltage or high temperature parts.

Before returning the receiver to the customer,                                                  AC Volt-meter

always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc., to
be sure the set is safe to operate without damage of electrical                                                     Good Earth Ground
shock.                                                                                                              such as WATER PIPE,
                                                                           To Instrument's                          CONDUIT etc.
                                                                                                     0.15 uF
Leakage Current Cold Check(Antenna Cold Check)                             exposed
With the instrument AC plug removed from AC source, connect an             METALLIC PARTS
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC                                1.5 Kohm/10W
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.                                                                  When 25A is impressed between Earth and 2nd Ground
If the exposed metallic part has a return path to the chassis, the           for 1 second, Resistance must be less than 0.1 
measured resistance should be between 1 M and 5.2 M.
                                                                              *Base on Adjustment standard
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.




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