ADN CU1 | 17
Cleaning and maintaining the conference system
ENFRESRUNL ITJPDK ZHFINO SE DE
Setting the volume of the conference units’ built-in
loudspeakers
You can set the volume of the conference units’ built-in loudspeakers via the jog
dial on the central unit. The standard display displays the current volume
setting N.
Cleaning and maintaining the
conference system
̈ Before cleaning, switch the product off and disconnect the central unit from the
mains.
̈ Only use a dry and soft cloth to clean the product.
To ensure optimum cooling of the central unit:
̈ Clean the air vents on the front, back and bottom from time to time with a soft
brush or paintbrush in order to avoid dust deposits.
Direct Access 30 Units
20
N
CAUTION
Danger of hearing damage due to loud hissing!
When the floor channel volume is set to a high level or when several
participants speak simultaneously, feedback noise (loud hissing) can
occur. This can cause hearing damage.
̈ Reduce the floor channel volume (see below).
̈ Make sure that the “Audio Gain Reduction” function is activated
(see page 14). This function reduces the gain per active micro-
phone by the selected level and thus prevents feedback noise.
̈ Increase the distance between the individual conference units to
at least 50 cm.
̈ Turn the jog dial
– to the right to increase the volume or
– to the left to reduce the volume.
CAUTION
Liquids can damage the product!
Liquids entering the product can cause a short-circuit in the electronics or damage
the mechanics.
Solvents or cleansing agents can damage the surfaces of the product.
̈ Keep all liquids away from the product.
̈ Do not use any solvents or cleansing agents.
KA_ADN-CU1_535358_0211_SP13.book Seite 17 Dienstag, 1. Februar 2011 12:43 12