Technical data

ASTi DACS: Operation & Maintenance Manual (Version 4, Rev. B.1) www.asti-usa.com

Chapter 5: Test and Maintenance

MTBF and MTTR

Mean Time Between Failure numbers for all DACS modules are included in Appendix B. When

spares support is at the recommended module level, DACS Mean Time To Repair is less than 45

minutes for 2U and 4U chassis.

** WARNING **

Removing the cover of the chassis, as is required for hardware replacement procedures described

in this section, will void any warranties on the system. If your system is still under a hardware war-

ranty or you are unsure whether the system is under warranty, please contact ASTi in the event of a

failure.

Tools and Test Equipment

No special tools or test equipment are required for testing and maintaining the DACS. The follow-

ing items, however, are useful or required for some of the procedures found in this manual.

• 1/4” Flat Screwdriver

• #1 Philips Screwdriver

• Standard Needle Nose Pliers

Spare Equipment

The following sections provide information concerning sparing of equipment.

Spares Philosophy

In general the DACS maintenance philosophy is to isolate faults down to the lowest replaceable

unit, remove and replace the faulty unit, and return the unit to the factory for repair.

Sparing should be implemented in one of two ways. Either by sparing the individual replaceable

units or by purchasing a “Hot” spare conﬁgured identically at the system level which allows the

entire DACS unit to be replaced quickly.