User Manual
MAINTENANCE 
20221081 / F  43 
5.  MAINTENANCE 
5.1  General 
Service on the HS50 hardware in the field can consist of: 
•  Replacing damaged cables 
•  Replacing failed Sensor unit 
•  Replacing failed Processing unit 
•  Replacing failed Display unit 
The Sensor unit is not designed for service in the field and 
opening the housing will result in damage or degradation of the 
unit and void the warranty. A failed Sensor unit has to be 
shipped back to Simrad in the original transportation box or 
another appropriate box for service. The return address is 
provided in the last pages of this manual. 
The software in HS50 can be upgraded to latest version in the 
field by connecting an external PC to the Processing unit. A 
software upgrade has to be performed by Simrad service people 
or representatives. 
5.2  Periodic maintenance 
The user should execute all necessary maintenance. This 
includes normal cleaning of all units and inspection of cables 
and connectors at intervals. Components which malfunction 
should either be replaced or sent back to Simrad for service. 
The periodic maintenance of the HS50 components is as 
follows: 
Sensor unit 
Make a visual inspection at 2-3 months intervals, and at the start 
of each season. 










