Sharp LC-40LE730E Service Manual

3
LC-40LE730
LC-46LE730
LC-20B5E
TO EXPOSED
METAL PARTS
CONNECT TO
KNOWN EARTH
GROUND
DVM
AC SCALE
1.5k ohm
10W
0.15 µF
TEST PROBE
SAFETY NOTICE
Many electrical and mechanical parts in LCD television have special safety-related characteristics.
These characteristics are often not evident from visual inspection, nor can protection afforded by them be necessarily
increased by using replacement components rated for higher voltage, wattage, etc.
Replacementpartswhichhavethesespecialsafetycharacteristicsareidentiedinthismanual;electricalcomponents
havingsuchfeaturesareidentiedby““.
For continued protection, replacement parts must be identical to those used in the original circuit.
The use of a substitute replacement parts which do not have the same safety characteristics as the factory recommended
replacementpartsshowninthisservicemanual,maycreateshock,reorotherhazards.
IMPORTANT SERVICE SAFETY PRECAUTION
Service work should be performed only by qualied service technicians who are thoroughly familiar with all
safety checks and the servicing guidelines which follow:
WARNING
1.Forcontinuedsafety,nomodicationofanycircuitshouldbeattempted.
2. Disconnect AC power before servicing.
BEFORE RETURNING THE RECEIVER (Fire & Shock Hazard)
Before returning the receiver to the user, perform the following safety checks:
1. Inspect all lead dress to make certain that leads are not pinched, and check that hardware is not lodged between the
chassis and other metal parts in the receiver.
2. Inspect all protective devices such as non-metallic control knobs, insulation materials, cabinet backs, adjustment and
compartment covers or shields, isolation resistor-capacitor networks, mechanical insulators, etc.
3.Tobesurethatnoshockhazardexists,checkforleakagecurrentinthefollowingmanner.
• Plug the AC cord directly into a 220~240 volt AC outlet. (Do not use an isolation transformer for this test).
•Usingtwoclipleads,connecta1.5kohm,10wattresistorparalleledbya0.15µFcapacitorinserieswithallexposedmetal
cabinet parts and a known earth ground, such as electrical conduit or electrical ground connected to an earth ground.
•AtrueRMSreadingmultimetershouldbeusedforthistest,especiallywheretheequipmentusesaswitchmode
power supply which may result in very non-sinusoidal leakage current.
•Connecttheresistorconnectiontoallexposedmetalpartshavingareturntothechassis(antenna,metalcabinet,
screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor.
AllchecksmustberepeatedwiththeACcordplugconnectionreversed.(Ifnecessary,anonpolarizedadaptorplugmust
be used only for the purpose of completing these checks.)
Anyreadingof1.05Vpeak(thiscorrespondsto0.7mA.peakAC.)ormoreisexcessiveandindicatesapotentialshock
hazardwhichmustbecorrectedbeforereturningthemonitortotheowner.
!
CAUTION: FOR CONTINUED PROTECTION AGAINST A RISK OF
FIRE REPLACE ONLY WITH SAME TYPE F101 (T4 AH / 250V)

Sharp LC-40LE730E Specifications

General

Brand	Sharp
Model	LC-40LE730E
Category	LCD TV
Language	English