Service manual

3
1 INTRODUCTION TO THE SIMRAD RD68 FIXED DSC VHF RADIO
The Simrad RD68 is a combined VHF radio, watch-keeping receiver and Class
D Digital Selective Calling (DSC) unit to facilitate routine and distress calling on
VHF Channel 70. Digitally Selected Calls are quicker and simpler to make than
traditional voice calls using Channel 16 and should a distress situation occur, an
alert can quickly be raised indicating identity, position and nature of the
emergency and automatically establish communication on the emergency voice
channel. The RD68 is robustly constructed using a pressure die cast aluminium
case for effective heat dissipation ensuring maximum transmission performance
even after many hours of constant use.
The RD68 has full international channel capability; 16 pre-programmed private
channels; features Dual Watch, Tri Watch, Scan and full memory operation;
back-lit LCD display and is available with either fist-mic or telephone handset.
The main components of the Simrad RD68 are:
1.1 Electronics PCBs
a. Receiver / Transmitter PCB Drawing No. E03866
b. Control PCB Drawing No. E03656
c. Second Receiver PCB Drawing No. E03211
d. Fist Mic Drawing No. E03283
e. Telephone Handset Drawing No. E03308
1.2 Mechanical Components
a. RD68 Chassis Drawing No. E03848
b. RD68 Assembly Drawing No. E03847
c. Fist Mic Assembly Drawing No. E03161
d. Telephone Handset Assembly Drawing No. E03162