KDE-55XBR950 (serv.man2) - Sony TV Service Manual (repair manual). Page 12

 

 

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The work procedures shown with the    Note    indication are important for ensuring the 
safety of the product and the servicing work. Be sure to follow these instructions. 

 

Before starting the work, secure a sufficient working space. 

 

At all times other than when adjusting and checking the product, be sure to turn OFF the 
main POWER switch and disconnect the power cable from the power source of the display 
(jig or the display itself) during servicing.   

 

To prevent electric shock and breakage of PC board, start the servicing work at least 30 
seconds after the main power has been turned off. Especially when installing and removing 
the power supply PC board and the SUS PC board in which high voltages are applied, start 
servicing at least 4 minutes after the main power has been turned off. 

 

While the main power is on, do not touch any parts or circuits other than the ones specified. 
The high voltage power supply block within the PDP module has a floating ground. If any 
connection other than the one specified is made between the measuring equipment and 
the high voltage power supply block, it can result in electric shock or activation of the 
leakage-detection circuit breaker.   

 

When installing the PDP module in, and removing it from the packing carton, be sure to 
have at least two persons perform the work while being careful to ensure that the flexible 
printed-circuit cable of the PDP module does not get caught by the packing carton.   

 

When the surface of the panel comes into contact with the cushioning materials, be sure to 
confirm that there is no foreign matter on top of the cushioning materials before the surface 
of the panel comes into contact with the cushioning materials. Failure to observe this 
precaution may result in the surface of the panel being scratched by foreign matter.   

 

When handling the circuit PC board, be sure to remove static electricity from your body 
before handling the circuit PC board.   

 

Be sure to handle the circuit PC board by holding the such large parts as the heat sink or 
transformer. Failure to observe this precaution may result in the occurrence of an 
abnormality in the soldered areas.   

 

Do not stack the circuit PC boards. 
Failure to observe this precaution may result in problems resulting from scratches on the 
parts, the deformation of parts, and short-circuits due to residual electric charge. 

 

Routing of the wires and fixing them in position must be done in accordance with the 
original routing and fixing configuration when servicing is completed. 
All the wires are routed far away from the areas that become hot (such as the heat sink).   
These wires are fixed in position with the wire clamps so that the wires do not move, 
thereby ensuring that they are not damaged and their materials do not deteriorate over 
long periods of time. Therefore, route the cables and fix the cables to the original position 
and states using the wire clamps. 

 

Perform a safety check when servicing is completed.   
Verify that the peripherals of the serviced points have not undergone any deterioration 
during servicing. Also verify that the screws, parts and cables removed for servicing 
purposes have all been returned to their proper locations in accordance with the original 
setup.