Do the
following safety checks after servicing this unit.
1. Remove
all the externally connected test equipment and wires before testing the unit.
2. Use the safety test circuit as shown below.
3. Plug the power cord or unit to be tested into the test receptacle.
4. Switch the unit being tested to ON or PLAY.
5. Connect external jack/terminal contact VTVM across a 1k resistor in the test
circuit. Set the meter to a high (150V AC) scale to avoid meter damage and then
touch the points with the test probe. If the meter reading indicates less than 3 volts on all test points, set the
meter to a low (3V AC) scale and repeat the test.
6. Any reading greater than 0.2 volt indicates a potential shock hazard. If
this occurs, determine the cause of the leakage, correct the problem, and
repeat the safety test.
It
makes sense to avoid exposure to electrical shock. While some sources are expected to have a
possible dangerous impact, others of quite high potential are of limited
current and are sometimes held in less regard.