XOCECO LC-42HW36, Service Manual

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Safety precautions 

1. Instructions

Be sure to switch off the power supply before replacing or welding any components or 
inserting/plugging in connection wire Anti static measures to be taken (throughout the entire 
production process!): 
a) Do not touch here and there by hand at will; 
b) Be sure to use anti static electric iron; 
c) It’s a must for the welder to wear anti static gloves. 
Please refer to the detailed list before replacing components that have special safety requirements. 
Do not change the specs and type at will. 

2. Points for attention in servicing of LCD 

2.1 Screens are different from one model to another and therefore not interchangeable. Be sure to 
use the screen of the original model for replacement.   
2.2 The operation voltage of LCD screen is 700-825V. Be sure to take proper measures in 
protecting yourself and the machine when testing the system in the course of normal operation or 
right after the power is switched off. Please do not touch the circuit or the metal part of the module 
that is in operation mode. Relevant operation is possible only one minute after the power is 
switched off.   
2.3 Do not use any adapter that is not identical with the TV set. Otherwise it will cause fire or 
damage to the set.   
2.4 Never operate the set or do any installation work in bad environment such as wet bathroom, 
laundry, kitchen, or nearby fire source, heating equipment and devices or exposure to sunlight etc. 
Otherwise bad effect will result.   
2.5 If any foreign substance such as water, liquid, metal slices or other matters happens to fall into 
the module, be sure to cut the power off immediately and do not move anything on the module lest it 
should cause fire or electric shock due to contact with the high voltage or short circuit. 
2.6 Should there be smoke, abnormal smell or sound from the module, please shut the power off at 
once. Likewise, if the screen is not working after the power is on or in the course of operation, the 
power must be cut off immediately and no more operation is allowed under the same condition.   
2.7 Do not pull out or plug in the connection wire when the module is in operation or just after the 
power is off because in this case relatively high voltage still remains in the capacitor of the driving 
circuit. Please wait at least one minute before the pulling out or plugging in the connection wire. 
2.8 When operating or installing LCD please don’t subject the LCD components to bending, twisting 
or extrusion, collision lest mishap should result.   
2.9 As most of the circuitry in LCD TV set is composed of CMOS integrated circuits, it’s necessary 
to pay attention to anti statics. Before servicing LCD TV make sure to take anti static measure and 
ensure full grounding for all the parts that have to be grounded.   

2.10 There are lots of connection wires between parts behind the LCD screen. When servicing or 
moving the set please take care not to touch or scratch them. Once they are damaged the screen 

Note: 

This maintenance manual is intended only for the reference of the maintenance people. 

Please pay attention to the following points before carrying out the maintenance work.