490 Echo Sounder Operations Manual Rev. B2
Page 8-1
Troubleshooting 490 Operations
Troubleshooting the echo sounder . . . . . . . . 8-2
Checking the transducer . . . . . . . . . . . . . . . . . . . 8-4
T
his chapter explains how to troubleshoot the echo sounder
system before returning the equipment for factory service.