Bang & Olufsen DVD 2, Service Manual

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Final check after repair
The final check after repair, describes the activities that are needed to ensure the
product will be returned in perfect condition to the customer.
Insulation test
Each product must be insulation tested after having been dismantled. Make the
test when the product 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 to ground on the
aerial socket.
NOTE!
To avoid damaging the product, 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 AC
and max. 10mA is obtained.
Maintain that voltage for one second, then slowly turn it down to 0 V AC again.
Customer setup
Remember to inform the customer of any changes that have been made in the
user setup, due to procedures in the Service Manual, such as Connections, Sound,
Picture, etc.
Restore the product to the customer setup.
Check all sources are working correctly
- Check that picture and sound from all sources are working correctly.
- Check that HDD browser is working correctly.
Product cleaning
Never user alcohol or other solvents to clean any part of the product.
Use a soft, lint-free cloth to clean the surfaces of the product.
Cabinet surfaces
Wipe dust off the surfaces using a dry, soft cloth. Remove grease stains or
persistent dirt with a soft, lint-free, firmly wrung cloth, dipped in a solution of
water containing only a few drops of mild detergent, such as washing-up liquid.
Dealer script
The ‘End User/Dealer script interface’ gives a diagnosis on the DVD 2.
In this mode, a number of hardware tests (nuclei) are automatically executed to
check if the recorder is faulty. The diagnosis is simply a “FAIL” or “PASS” message.
If the message “FAIL” appears on the display, there is apparently a failure in the
recorder. If the message “PASS” appears, the nuclei in this mode have been
executed successfully. There can be still a failure in the recorder because the nuclei
in this mode do not cover the complete functionality of the recorder.
4.14 Final check after repair