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901-10037001/1.1 FS 20/25 Operators Manual

Page 5.18 Maintenance and Troubleshootin

Kongsberg Simrad Mesotech Ltd.

Port Coquitlam, BC - Canada

5.5.3.1 PC to PWR/TTM Unit (Digital)

The first stage in bringing the system on line is to have the PC establish a

communication link with the digital portion of the LF Sub-assemblies. As far as the

PC is concerned, it is talking to, and will eventually be running “digital head(s)”. This

area of the run up sequence occurs during the “Connect Heads”, and then “Detect

Heads” phase (Refer to Section 4.4.4). Using an FS20/25 system as an example,

the following window illustrates a communication problem between the PC and the

LF2 Sub-assembly.

Note that Head #1 is connected to COM1, but that COM2 does not indicate any

head attached. Note also that there is a Red Check beside COM2, which means that

the port is enabled. This fault could indicate a problem with either the PC COM Port

itself or the LF2 Sub-assembly. It does not mean that there is a problem with the

FS925 head because that stage of the run up hasn’t been attempted yet!

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Simrad FS25 Guida Utente Pagina 90