Sennheiser ADN D1 Instructions for Use - Page 151

If a problem occurs ... If a problem occurs ... Conference system Problem Possible cause Possible solution Page ADN CU1 central unit and/or No connection to the mains power ADN PS power supply supply. cannot be switched on Connect the ADN CU1 central unit and/ 24 or the ADN PS power supply to the mains power supply. ADN PS power supply cannot be switched on No connection to the central unit. Correctly connect the ADN PS power 31 supply to the ADN CU1 central unit and switch the central unit on. ADN PS power supply can be Too many ADN PS power supplies used You can use a max. of 15 ADN PS - switched on but cannot be in the conference system. power supplies in a conference system. detected by the conference Reduce the number of ADN PS power system supplies. Conference unit cannot be The conference unit is not connected Check if all plugs are connected 29 used/activated correctly. correctly. The cable string/cable ring is too long. Reduce the length of the cable string/ 15 cable ring or reduce the number of conference units. The maximum number of requests to Increase the maximum number of speak has been reached. requests to speak. 52 or 128 The ADN C1 chairperson unit has not been initialized before use. If chairperson units are connected afterwards, you have to initialize them. 54 or 124 Too many ADN C1 chairperson units used in the conference system. You can use a max. of 10 chairperson units in a conference system. Since each chairperson unit reduces the max. possible number of speakers ("Microphone Limit"), reduce the number of ADN C1 chairperson units. 51 or 127 Too many conference units used in the You can use a max. of 400 conference - conference system. units in a conference system. Reduce the number of conference units. The central unit's display panel displays error icons/ the display panel lights up red Changes or errors have occurred. Check the possible causes indicated by 59 the icons. Volume of the conference units' loudspeakers is too high or too low The processing of the conference units' Adjust the processing of the conferaudio signals ("Audio Gain Reduc- ence units' audio signals. tion") is adjusted so that the gain of each additional channel is reduced too much or too little. 56 or 131 The floor channel volume is not adjusted correctly. Adjust the floor channel volume. 76, 130 or 140 Loud hissing at the confer- The conference units are placed too ence units' loudspeakers close together. Increase the distance between the - individual conference units to at least 50 cm. The floor channel volume is adjusted Reduce the floor channel volume. to a very high level. 76, 130 or 140 The "Feedback Suppression" function for eliminating feedback is deactivated. Activate the "Feedback Suppression" 57 or 132 function ("Low Intensity" or "High Intensity"). 150 | ADN Digital Conference System