TX-21PS70TQ - Panasonic TV Service Manual (repair manual). Page 9

 

1.  It is advisable to insert an isolation transformer in the AC supply before servicing this hot chassis.

2.  When servicing, observe the original lead dress, especially the lead dress in the high voltage 

circuits. If a short circuit is found, replace all parts which have been overheated or damaged by 
the short circuit.

3.  After servicing, see to it that all the protective devices such as insulation barriers, insulation 

papers, shields and isolation R-C combinations, are properly installed.

4.  When the receiver is not to be used for a long period of time, unplug the power cord from the AC 

cord outlet.

5.  Potential, as high as 

27.5kV

 is present when this receiver is in operation. Operation of the receiver 

without the rear cover involves the danger of a shock hazard from the receiver power supply. 
Servicing should not be attempted byanyone who is not thoroughly familiar with the precautions 
necessary when working on high voltage equipment. Always discharge the anode of the picture 
tube to the receiver chassis before handling the tube. After servicing make the following 
leakagecurrent checks to prevent the customer from being exposed to shock hazards.