Panasonic TX-29PS72X Service Manual

Panasonic TX-29PS72X Service Manual Manual pdf 3 page image

Fig. 12. When servicing, observe the original lead dress, especially thelead dress in the high voltage circuits. If a short circuit is found,replace all parts which have been overheated or damaged by theshort circuit.3. After servicing, observe that all the protective devices such asinsulation barriers, insulation papers, shields, and isolation R-Ccombinations, 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 outlet.5. Potential, as high as 31.7 kV is present when this receiver is inoperation. Operation of the receiver without the receiver powersupply. Servicing should not be attempted by anyone who is notthoroughly familiar with the precautionsnecessary when workingon high voltage equipment. Always discharge the anode of thepicture tube to the receiver chassis before handling the tube.After servicing make the following leakage current checks toprevent the customer from being exposed to shock hazards.1.2. Leakage Current Cold Check1. Unplug the AC cord and connect a jumper between the twoprongs on the plug. Fig. 2.Fig. 22. Turn on the receiver’s power switch.3. Measure the resistance value, with an ohmmeter, between thejumpered AC plug and each exposed metallic cabinet part on thereceiver, such as screw heads, aerials, connectors, control shafts,3