Maintenance Of The Mcw-D Microphone Units; Safety Code - Beyerdynamic MCW DIGITAL Operating Instructions Manual

2.5 Documentation Output
A headphone (e.g. DT 301) can be connected to the documentation output (4). We recommend a min. impedance of 200 Ω.
ATTENTION: This connection has been covered, because at present special headphones can be connected only. If you need
this connection please contact beyerdynamic.
2.6 CA 2455 External Power Supply
The MCW-D microphone units can be powered with the CA 2455 external power supply unit which can be connected to the
multi-function socket (1). The DC-voltage should be 18 V DC (±0.5 V), current max. 180 mA, residual hum < 20 mV.
Important:
Connect and disconnect the external power supply only when the microphone unit is switched off.
If the microphone unit is powered by the DC-power supply first and when the power supply is switched off, the microphone unit will be
powered by the integrated battery until it is nearly empty. The microphone unit switches off automatically to avoid an exhaustive
discharge.
But if the switched on microphone unit is powered by the battery first and then connected to DC-power, the external power supply will
power the microphone unit.

2.7 Maintenance of the MCW-D Microphone Units

For cleaning the MCW-D microphone units when they are slightly dirty (finger prints, dust, jam or juice) use a soft, damp cloth,
sponge or brush and a liquid cleaning agent. Before cleaning the surface it must be moistened thoroughly. Afterwards it must be
cleaned with clear water. Make sure not to allow any water to enter the unit. For dirt caused by mineral oils and fats, animal and
vegetable fats use spirit, isopropyl alcohol or benzine.
For dirt caused by ballpoint pens, typewriter ribbons or carbon paper use isopropyl alcohol or spirit.
Clean the supplied pop shield with clear water. Make sure that it is completely dry before you put it on the microphone again.

2.8 Safety Code

Using the MCW-D Editor software or the MCW-D 1003 programming device a safety code can be entered for the MCW-D micro-
phone units and the MCW-D 100 control unit within one system. This will increase the safety against unauthorised listening. For a
detailed description please refer to the appropriate manuals.
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