Operator Manual
Issue 1
TIL – Eng – Spec – 080
Page 53 of 70
SeaHub
7.4.3. Checking/replacing the DC Ext Output Power (+12V & +5V Supply) Fuses
Use this section if there is no +12V or +5V power from “AIF ArcNet Connector” or the 4mm Power
Sockets on the rear of the unit (and the power selection jumpers are set to output one of these voltages).
16) Unplug the SeaHub unit from
any power sources.
17) Follow the steps described in
section 7.1 to open the housing.
18) Locate fuses “F2” and “F4” on
the PCB.
19) Use a continuity tester to determine if the fuse “F2” has
blown – supplying the main PCB power from which both
+12V and +5V is derived.
20) Use a continuity tester to determine if the fuse “F4” has
blown – supplying the +5V supply.
21) Both these fuses are 2A surface mount “Quick Acting” fuses. If either has blown the most likely
cause is excessive current drain from an externally connected device (5V for USB peripherals is
protected by over-current limiting circuitry to prevent damage) – review you power setup,
requirements and jumper settings. However, it is recommend to contact
Tritech
Technical Support
for further assistance.