Clarity A Division of Plantronics Inc. C120 ユーザーズマニュアル

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1. Ensure that proper installation and setup procedures were followed by 

reading the user guide carefully.

2. Check to see if all the equipment is turned on, including the television 

or VCR.

3. Look over all the cord connections (power, audio from television etc.), 

making sure none have become loose or disconnected.

4. Ensure that the line of sight from the transmitter base to the headset 

receiver is clear.

5. Check the battery in the C120™ Headset to see if it is fully charged.

6. Check to see if the infrared sensor on the base is facing the headset and 

make sure the headset sensor is facing the base.

7. If the microphone is being used, try either turning up the television or 

repositioning the microphone.

1. If while in one mode (Stereo/Mono), static is experienced, switch the base 

to the other mode.

2. Check the level of direct sunlight in the room. Too much direct sunlight 

can cause interference.

3. Make sure the base is at the same height or above the level of the headset 

when being worn.

If, after going through this checklist, the C120™ is still not functioning 
properly, call Clarity at 1-800-426-3738.