Checking The Receiver Section; Checking The Sensors - Klein 3000 Series Troubleshooting Manual

SYSTEM 3000 OPERATIONS AND MAINTENANCE MANUAL
Meter across each of the FET's as in the previous photo. The reading should be
about 2.4 Meg ohms. Reverse your test leads and re-measure. The reading will now
be about 3.7 Meg ohms. Readings will vary slightly, but if there is a large reduction in
resistance, the FET may be questionable.
4.30

CHECKING THE RECEIVER SECTION.

If your sonar image seems to be having problems on one side, this is an indication
that you may have a receiver problem. Try swapping to a spare Transceiver board to
see if the problem follows the board. Alternately you can swap the transducers at the
feed-thru to see if the problem stays the same (still most likely a board problem), or if
it changes sides, it could possibly be a transducer problem.
4.31

CHECKING THE SENSORS.

Sensor readings can be read out directly on the display as seen in the above picture.
Move the towfish in pitch, roll and heading, and check to see if the readings change.
If you have no sensor readings check that the cable is properly plugged into the
Multiplexer board at JP3. Also check that the cable is properly connected at the
compass board.
L-3 Klein Associates, Inc. TROUBLESHOOTING GUIDE 4-63