Bang & Olufsen beosound 1 2581, Service Manual

Page: 12 / 94

2.10
#6 Test after repair of BeoSound 1
For information on the general use of BeoSound 1 please refer to the BeoSound 1
Guide.
Reassemble BeoSound 1
- Reassemble BeoSound 1 if not done already. See 11.1 Dissambly/Assembly of
BeoSound 1 if necessary.
Perform an AC leakage test
Check the antenna terminals and other exposed metal parts for AC leakage.
- Remove the line cable from the AC source (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
each of the exposed metal parts, that is antenna connection, aerial and front
cover.
- The resistance during these measurements must be of 1 Mega Ohm or more. If
resistance is below 1 Mega Ohm, this indicates an abnormal situation and
corrective actions must be taken.
Please note: Avoid any skin contact either with the AC plug nor the metal parts
while performing the test, as it may infl uence the measurement.
Connect mains voltage to BeoSound 1
- Reconnect mains voltage and turn on BeoSound 1. See #4 Theft protection if
necessary.
Read-out and clear error codes
- Enter TM27 and read-out the errors for service use. Clear errors when done.
See #3 Test mode if necessary.
Check keyboard functions
- Check that all keyboard buttons are OK.
Check Radio functions
- Tune in and store at least one radio station. Check other radio functions as well.
Check CD functions
- Insert a CD in the CD-loader. The test-CD SBC 444A can be used. Ensure that
tracks 10, 17 and 19 on the CD are being played correctly.
Check speakers
- Ensure that all speakers are playing correctly and without dissonance.
Check surfaces and clean these if necessary
- Use a dry, soft cloth. If necessary remove persistent dirt with a lint-free, fi rmly
wrung cloth, dipped in a solution of water containing only a few drops of mild
detergent. The front may also be cleaned with a soft brush mounted on a vacuum
cleaner set to the lowest level.
Test after repair of BeoSound 1, English