MTX-103 VHF Marine Transceiver (190-1004) Troubleshooting Faxback Doc. # 18751 IF YOU HAVE PROBLEMS If your transceiver does not operate properly, check the following items first. If you still have a problem, bring the transceiver to your local Radio shack store for assistance. Important: Repair and/or adjustment of this transceiver must be performed by a technician with an FCC generalclass commercial license. Check the battery pack condition. If you are using an external antenna, check the antenna cable and its connection at both ends. Check the connections of an external microphone or external speaker. Check the settings of the VOLUME control, SQUELCH control, 1W/5W switch, NORM/CH16/WX switch, and the frequency channel thumbwheels. (SP/all-01/23/96)