Edgetech 2000-TVD, User Hardware Manual

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could be: “No Sonar Device Found”, this will indicate that the CPU does not connect to the sonar processor
card. “IF_DIAG” the sonar processor has detected an error and will not run. Cycle power on towfish
recheck error, if the error is still present check the cables running to and from the sonar interface card.
“HM_Sensors” this reports the 48 volts if this error is found check output of power distribution board in
towfish and also the power on the power amps.
6.3.7.3 Power Supplies
Several power supplies and voltage regulators are located throughout the towfish assembly. The main
ones are located on the Power Distribution board. The first supply converts the 400VDC tow cable voltage
to the ope48VDC supply. Other DC/DC converters running off the 48 volts generate the low level
operating supply voltages. No supplies are adjustable.
The following are the main voltage test points on the Power Distribution board:
SUPPLY TEST POINT RETURN
+5 VDC +/-0.2V TP7 TP12
+12 VDC +/-0.6V TP8 TP12
-12 VDC +/-0.6V TP9 TP12
+27 VDC +/-0.6V TP10 TP12
+48 VDC +/-2.0V TP4 TP5
Table 6-3: Main Voltage Test Points on Tow Fish Power Distribution Board
Other voltages to check on the SSB board and labeled as such are:
SUPPLY
+3.3 VDC +/-0.1
+5 VDC +/-0.2V
+12 VDC +/-0.6V
-12 VDC +/-0.6V
Table 6-4: Other Voltages on SSB Board
6.3.7.4 Test Lights
1. Power Distribution Board.
Monitor the +400 volt D4 and +48 volt D8 LED’s. They should be on steady.