1-2. General Guidelines
When servicing, observe the original lead dress. If a short circuit is found, replace all parts
which have been overheated or damaged by the short circuit.
After servicing, see to it that all the protective devices such as insulation barriers, insulation
papers shields are properly installed.
After servicing, make the following leakage current checks to prevent the customer from
being exposed to shock hazards.
1) Leakage Current Cold Check
2) Leakage Current Hot Check
3) Prevention of Electro Static Discharge (ESD) to Electrostatically Sensitive
1-3. Important Notice
1-3-1. Follow the regulations and warnings
Most important thing is to list up the potential hazard or risk for the service personnel to
open the units and disassemble the units. For example, we need to describe properly
how to avoid the possibility to get electrical shock from the live power supply or charged
electrical parts (even the power is off).
This symbol indicates that high voltage is present inside.It is dangerous to
make any king of contact with any inside part of this product.
This symbol indicates that there are important operating and maintenance
instructions in the literture accompanying the appliance.
1-3-2. Be careful to the electrical shock
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to rain or excessive moisture. This TV must not be exposed to dripping or splashing water,
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1-3-3. Electro static discharge (ESD)
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such
components commonly are called Electrostatically Sensitive (ES) Devices. The following
techniques should be used to help reduce the incidence of component damage caused by
electros static discharge (ESD).
1-3-4. About lead free solder (PbF)
This product is manufactured using lead-free solder as a part of a movement within the
consumer products industry at large to be environmentally responsible. Lead-free solder
must be used in the servicing and repairing of this product.
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Special parts which have purposes of fire retardant (resistors), high-quality sound
(capacitors), low noise (resistors), etc. are used.
When replacing any of components, be sure to use only manufacture's specified parts
shown in the parts list.
Safety Component
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- 03 -
Summary of Contents for L42B1180
Page 13: ...3 4 LCD Panel 12 T420H W06 V2 AU ...
Page 18: ... 17 ...
Page 19: ... 18 ...
Page 20: ... 19 ...
Page 25: ...6 3 Setting Up Your Remote Control 24 ...
Page 26: ...7 Electrical parts 7 1 Block diagram 25 AMP Headphone Coaxial 1 2 MSD318QT Main IC ...
Page 37: ...8 TV OPERATION 36 ...
Page 38: ... 37 ...
Page 39: ... 38 Press ENTER Key To Select ...
Page 40: ... 39 Press ENTER Key To Select ...
Page 41: ... 40 ...
Page 44: ... 43 9 Trouble shooting 9 1 Simple check ...
Page 46: ... 45 3 Panel display abnormally connector J9 is at normal level ...
Page 50: ... 49 7 PC no picture or picture abnormal ...
Page 51: ... 50 8 YPBPR AV no picture or picture abnormal Check Y ...
