1. Users can’t hear each other well across the TTU. One person may be silent or clipped when talking. This is normally due to calibration issues.
Watch our video here and see how to calibrate the TTU.
Turn on the Talk-Thru Unit to either mute or auto-mute and set the talk volume to zero. The talk volume is the sensitivity on the employee side of the TTU. If this setting is too high, background noise will constantly keep the TALK LED lit and the customer side will never turn on. If it’s too low, the customer will never hear the employee.
Then position your mouth one to two inches away from the tip of the gooseneck microphone. Start talking into the microphone normally. Because the talk volume is set to zero it won’t light up. Start increasing the Talk volume control slowly as you continue talking. You’ll see the TALK LED start lighting up. When you stop or pause, the green led will switch off. Keep increasing the talk volume slowly. Eventually, you come to a position on the talk volume control where the green led will light up only when you are talking and will abruptly switch off when you stop talking. If the talk volume is set too high, the green led will stay on for some time after stop talking. The talk volume should normally be in the 8 or 9 o’clock position.
Next, have another on the other side of the partition and have them talk into the device like a regular customer. Increase the volume so that the customer can be heard clearly on the inside.
2. The TTU doesn’t turn on. Check the TTU for a faulty switch.
For the battery-powered TTU-1DX, plug in the charging adapter. The red LED should then light up. The unit needs to be charged for 8-10 hours before it can be used. If the red LED still does not light up, follow the instructions for the AC-powered devices below.
For AC Powered units including the TTU-1X, TTU-3X, and TTU-7X, check the power input from the adapter. If the red LED does not light up once the charging adapter is attached, remove the 4 screws which will give you access to the on/off/mute switch. The center pole connector (blue wire) on the switch should be at 15 V. If there is no DC voltage, check the connector and wiring back to the adapter. If you measure 15 V, place the switch to the on position and check the white wire (on the other pole) for 15 V. If not, the switch is bad and call Norcon for a replacement switch.