Sennheiser AC 2 Instructions for Use - Page 18
Make sure that the antenna is connected correctly. Use - solutions
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»¿ Connecting the mains unit The combiner is powered via the NT 3 mains unit. To switch the combiner on, press the on/off switch (POWER). The red LED lights up, indicating the the unit is ready for operation. ̈ Pass the cable through the cable grip ¿. ̈ Insert the DC connector on the power supply cable into the DC input ». Note: As soon as the combiner is switched on, the built-in fan starts producing a clearly audible operating sound and ensures proper cooling of the unit. Make sure that the air vents of the unit are not covered or blocked. If problems occur ... The combiner does not transmit a signal ̈ Check the connections of the NT 3 mains unit. Disturbed RF transmission ̈ Make sure that the antenna is connected correctly. Use low-loss RF cables which are as short as possible. If problems occur that are not listed above or if the problems cannot be solved with the proposed solutions, please contact your local Sennheiser agent for assistance. 17