User's Manual

NOTE: The magnetron in the transceiver is a lifed item, and should be replaced when the
running hours approach the life of the magnetron. Refer to the relevant radar sensor
Ship's Manual for details of life of a specific magnetron and for the procedures to replace
the magnetron.
COR REC TIVE MAIN TE NANCE
21 Cor rec tive main te nance should only be im ple mented by qual i fied per son nel. Cor rec tive
maintenance for this equip ment is lim ited to the re placement of Fuses in the
MantaDigital Processor.
Fuse Re place ment
22 The locations of the fuses in the MantaDigital Processor Unit are shown in Figure 3. The
fuses vary according to the particular processor unit but all fuse positions are shown in
the figure.
(1) Ship’s mains supply. Two fuses on Power Supply Assembly.
Fuse Anti-Surge 10 A 250 V. Kelvin Hughes Part No. 45-615-162-50.
(2) +12V supply on FSD-A178 PCB.
Fuse Anti-Surge 3.15 A. Kelvin Hughes Part No. 45-615-161-30.
23 Switch off the power supply to the Processor unit.
24 Gain access to the fuses, as follows:
(1) Open the front cover of the Processor unit.
(2) The mains fuses are located on the power supply assembly behind the drop down
mounting plate. Release the plate by lift the two, lever fasteners and lowering the
plate forwards, refer to Figure 3.
(3) The other fuses are located on the PCB(s) on the front of the mounting plate, see
Figure 1.
25 Fit the new fuse and secure it in the fuse holder.
Page 4.10 Issue 5 (Jan 09)
KH2060-4
CAU TION
This equip ment con tains Elec trostatic Sen sitive de vices. To pre vent dam age to equip -
ment; when im ple ment ing Cor rec tive Main te nance pro ce dures en sure that an earthing
strap is used to con nect the maintainer to the earth stud.
WARNING
LETHAL VOLT AGES ARE PRES ENT IN SIDE THE EQUIPMENT.
ALL COR RECTIVE MAINTENANCE MUST BE IM PLE MENTED WITH THE
POWER SUP PLIES SWITCHED OFF