Final check after repair
Isolation test
Each set must be insulation tested after having been dismantled. Make the test
when the set has been reassembled and is ready to be returned to the customer.
Flashovers must not occur during the testing procedure! Make the insulation test
as follows: 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 the chassis pin of the aerial socket.
NOTE!
To avoid damaging the set, it is essential that both terminals of the insulation
tester have good contact. Slowly turn the voltage control of the insulation tester
until a voltage of 2.5 kV and max. 5 mA is obtained. Maintain that voltage for one
second, and then slowly turn it down again.
Isolation test at the customer
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 power link plug. 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.
Test of the device
After the insulation test, it is important to do the final test of the device, to make
sure there are no other faults.
1. Turn on BeoSound 4 and load a CD. Play the CD.
2. Switch to SD play mode.
3. Switch to FM radio and make a tuning.
4. Switch to DAB radio and make a tuning.
5. Use volume up/down.
6. Make sure that both the remote control and the buttons work perfectly.
Before finishing the device, make sure that the option setting is correct.
1.6 Final check after repair
ABO-CENTER
v/HENRIKSENS
ELEKTRONIK
Содержание BeoSound 4 2851
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