Technical Note
FST-049 (May 2014)
Information included herein is controlled by the Export Administration Regulations (EAR) and may require an export license, license
exception or other approval from the appropriate U.S. Government agency before being exported from the United States or provided to
any foreign person. Diversion contrary to U.S. law is prohibited.
OO-DR Circuit Breaker Upgrade Kit
Introduction
The OO-DR Circuit Breaker Upgrade kit (P/N 75AK6017-00) replaces the transmit fuse F1 on the Underwater
Electronics Assembly (UWEA) with a circuit breaker on the Top Side Interface Box (TSIB).
Required Tools
•
Wire cutter
•
#1 Phillips screwdriver
•
Solderless Terminal Crimping tool (3M Crimp Tool TH-440 or equivalent)
•
Nut driver (5/16 and 3/8)
•
Wire ties
•
Ocean Observer Direct Reading Technical Manual
Top Side Interface Box Modifications
Static electricity can damage board components. TRDI recommends using an earth-grounded
wrist strap to help prevent such damage. You must have the wrist strap on whenever the TSIB
cover is removed.
Remove the TSIB top cover:
1. Turn off power to the TSIB. Disconnect all cables from the back panel of the TSIB.
2. Remove the TSIB top cover. The cover is held in place with four screws on the corners of the cover. Re-
move all screws and retain them.
3. Lift the cover slowly.
Do not break the grounding wire attached to the cover.
4. A grounding wire is attached to the underside of the top cover. Unplug the ground wire from the tab on
the top cover and lift off the cover.
Figure 1.
TSIB Top Cover
