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1.1 General Guidelines
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It is advisable to insert an isolation transformer in the power line and AC supply before servicing a hot
chassis.
When servicing this monitor, 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.
After the service, check that all the protective devices such as insulation barriers, insulation papers,
shields, and isolation R-C combinations are properly installed.
Before turning the monitor on, measure the resistance between B+ Iine and chassis ground. Connect
the "-" side of an ohmmeter to each B+ Iine, and the "+" side to chassis ground. The resistance of each
line must behigher than specified as follows:
When the monitor is not used for a long period of time, unplug the power cord from the AC outlet.
High voltage points, as high as 23.5 kV, are present when this monitor is in operation. Operating the
monitor without the rear cover involves you in a dangerous electric shock from the monitor power
supply. Servicing must not be attempted byanyone who is not thoroughly familiar with the necessary
precautions when working on high voltage equipment. Always discharge the anode of the picture tube
to the chassis ground before handling the picture tube.
After the service, make the following leakage current checks to prevent the customer from getting an
electric shock.
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file:///E:/BT-S1315DA_BT-S1315DAD_BT-S1415DA_BT-S1415DAD/SVC/s0101000000.html [2006-02-04 08:28:09]
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