Sperry Marine 4914-CA, Operation, Installation And Service Manual, Page: 77 / 192

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• 5 mm hex key
• 3 mm hex key
• No. 2 Phillips-head screwdriver
`^rqflk Risk of damage through unauthorized service
Only authorized service personnel is allowed to remove gyrocompass
system components from the compass housing.
Always keep to the mandatory safety requirements and the correct serv-
ice work procedures to remove gyrocompass system components from
the compass housing.
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This chapter describes removal and installation procedures of the
NAVIGAT X MK 1 system components. For a complete removal of all sys-
tem components from the compass housing, the gyrosphere container
must be removed beforehand.
The removal and installation procedures of the gyrosphere container are
described separately in chapter ‘Preventive Maintenance´.
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All CDU pictures within this chapter show the old type CDU without the
USP service interface at the back side, see “Control and display unit
(CDU) front and back view” on page 1-2 for new type details.
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Risk of damage of electrostatic-discharge-sensitive components
The NAVIGAT X MK 1 contains electrostatic sensitive components.
Electrostatic discharge may permanently damage components.
When servicing the NAVIGAT X MK 1, take considerable precautions to
prevent electrostatic discharge. Avoid touching any of the electronic cir-
cuitry.