Tritech International Ltd
Intelligent Gyro Compass
11.7.5
Replacement Of Sensor Assembly, I/F PCB and Processor Module
The procedure for replacement of the Sensor Assembly, Interface PCB and Processor Module (as a
single unit) is as follows:
1. Insert the PCB stack between the pillars and secure with the 3 x M3 cap screws to the
pillars. Engage the 8-way orange connector when lowering the PCBs into position.
2. Slide the insulating washer (Item 18) between the mounting block on the end-cap and the
two regulators. Position this washer so that the holes align with the regulator holes and
tapped holes in the end-cap.
3. Fit the small black plastic insulating bushes (Item 17) into the regulator tabs. Screw in
the 2 x M3 screws and washers (Items 16 & 13). Do not overtighten.
4. Check tightness of the 3 x M3 Interface PCB retaining screws.
5. Using a multimeter, check that there is no electrical continuity between the tab of both
regulators and the iGC end-cap. There is a threaded hole on the inside surface of the
end-cap that facilitates electrical continuity for checking. This is important, as a short-
circuit between the regulator tabs and the iGC housing may cause rapid corrosion of the
iGC housing. If continuity is measured, check the positioning of the insulating washer
and bushes.
6. Refit dome and function-check.
Issue 2
0707-SOM-00004
Page 36 of 51