D.7.2 Towfish Fuse - Klein 5000 SERIES Operation And Maintenance Manual

D-34
APPENDIX D General Setup, Configuration and Troubleshooting

D.7.2 Towfish Fuse

The towfish fuse is on the 200 VDC line to the towfish. Access to this fuse is
located on the back of the TPU just above the towfish connector.
The towfish fuse is a 6.3-A, 250-volt slow blow (P/N 13000163).
D.7.3 TPU Block Diagram
The TPU block diagram is shown in Figure D-8.
D.7.4 TPU Internal Access
To access the inside of the TPU, you must first remove the four screws on the front
of the unit, and then slide the TPU out toward you. Once the TPU is out of the
outer case, you can remove the top cover by removing the ten screws on the top
and the four screws down each side. The top cover then lifts off.
Series 5000 Sonar System Operations and Maintenance Manual
Figure D-8:
SHOCK HAZARD AC Voltages and high level DC voltages are present
inside the TPU. Therefore only qualified individuals should access the unit
to this level.
TPU Block Diagram
P/N 11210060, Rev. 16