Bang & Olufsen DVD 1 Mode D'emploi page 26

Insulation test
Insulation test at the Service center
Insulation test at the customer
Please note:
DVD 1 must be insulation tested if it has been dismantled.
Make the test when the DVD 1 is reassembled and is ready to be returned to the
customer.
Short-circuit the two pins of the mains plug and connect them to one of the
terminals of the Insulation tester. Connect the other terminal of the insulation
tester to ground on the DIGITAL OUTPUT socket.
To avoid damaging the DVD 1, it is essential to ensure that both terminals of the
insulation tester have good contact.
Slowly turn up the voltage control of the insulation tester until a voltage of 2.5kV(ac) is
obtained.
Maintain that voltage level for one second, then slowly turn it down again.
During the testing the current must not exceed 10mA.
Remove the mains cable from the wall outlet.
Place a jumper across the two AC plug prongs.
Use a multi-meter, set for measurements in the Ohm-area.
Place one lead from the multi-meter on the AC plug and place the other lead on
ground at the DIGITAL OUTPUT socket.
The resistance during this measurement must be of 1 Mega Ohm or more.
Resistance measured below 1 Mega Ohm indicates an abnormal situation and
corrective action must be taken.
Avoid all skin contact with the AC plug and all other metal parts while performing
the test, as this contact may infl uence the measurement.
Insulation test, English 7.1