Edgetech 2000-CSS, User Manual

Page: 93 / 101

6-9
6.3.7.1 Preliminary
When the electronics has been removed:
1. Check that all boards are still secured to their mountings.
2. Check the mating of all connectors
3.
Check that the terminal board screw connections are tight
4. Check for obvious hot /burn spots by sight and smell.
6.3.7.2 No Sonar Data
If the sonar display doesn’t scroll, use the ‘scope sniffing’ approach as outlined in T
RANSMISSION
V
ERIFICATION
to check transducer firing. If the transducers are firing, and the data link is working, the
problem is most likely related to the topside computer and/or data modem.
If the display scrolls but is blank and the transducers are firing, the problem most likely lies with either or
a combination of the towfish receiver, transducer or its signal processing circuitry. Establish if the problem
is on a single channel or all channels.
If data is absent in all, or individual channels, check the T/R Switch and SSB boards. If the problem is with
a particular channel, also check the respective power amplifier and transducer element.
Connect to towfish using REMOTE DESKTOP 192.9.0.101 login:
administrator
, password:
admin
. Sonar
application should be running and there should not be any errors posted to the window. Errors reported
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.