L3 Comminications SERIES 5000 Operation And Maintenance Manual - page 51
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CHAPTER 3 Preparation for Use
Series 5000 Sonar System Operations and Maintenance Manual
P/N 11210060, Rev. 13.0
After checking the power source, and modifying the power cord if required,
connect the TPU to AC power.
3.3.2 Power Line Fuse
The main AC power input line is protected by two 3-A, 0.25 x 1.25-inch fast acting
fuses rated for 250 volts. These fuses are located on the rear connector panel below
the power cord receptacle. Before changing the fuse, be sure that the TPU is
disconnected from its power source. To remove the fuse, open the hinged cover
with a flat bladed screwdriver and push the metal locking tabs outward. Each metal
locking tab is part of a fuse holder and can be pulled out with the tip of the screw
driver or the finger tips. Remove the fuse from the holder to check or change it.
When replacing it, the metal locking tabs must be oriented inward. When the tabs
are aligned, push in on the holder and close the hinged cover.
3.3.3 Towfish Fuse
The towfish is protected by a 630-mA, 5 x 20-mm slow acting fuse rated for
250 volts (P/N 13000043). It is located on the back panel of the TPU and is above
the TOWFISH connector. Before changing the fuse, be sure that the TPU is
disconnected from its power source. To remove the fuse, use a flat bladed
screwdriver to push in and then turn the fuse receptacle counterclockwise. The
fuse will pop out. Remove the fuse from the holder to check or change it. When
replacing it, there are two tabs that line up in the insert. When the tabs are aligned,
push in on it and turn it clockwise to lock it into position.
Table 3-1:
TPU Power Cord Wiring
COLOR
FUNCTION
Yellow/green
Ground (earth)
Blue
Neutral
Brown
Hot
CAUTION
Do not replace a fuse with one with a higher current rating. Do
not bypass the fuse. Failure to observe this caution may cause damage to
the equipment and void the warranty. If fuses blow repeatedly, there is a
problem that must be corrected before attempting further operation.