Solid State Logic Matrix 2 Owner's Manual page 138

Appendix G - Service
Part Numbers, Revision Levels etc.
Within this manual are details of adjustments which may be dependent upon the revision of each particular assembly. Therefore
a brief discussion on part numbers, revision levels etc. is in order.
Solid State Logic's manufacturing facilities, in common with all manufacturing companies, work with part numbers. If a part does
not have a part number, it simply does not exist! All SSL assemblies therefore will have a part number and all assemblies will have
a small white oblong label somewhere with that part number printed on it. This label should look something like this:
Part Number
All SSL assemblies (and in fact all components and items) have a unique part number. Sub assembly part numbers are generally 8
digits long (metalwork, drawings and documents can be 11 or 12 digits; the additional digits relate to revision level). Matrix
assembly numbers would typically be as shown:
Revision Level
The way that any assembly is built is controlled by the Revision Level. This is a decimal number which will increment every time
something about the build of an assembly changes; component value changes, firmware changes etc. are all changes that would
trigger a revision change. Wherever reference is made to 'Assembly Revision', it is the revision level on these partcode labels that
is being referred to.
Batch Number
SSL manufactures most assemblies in batches, which can range in size from 2 to100 or more. Each time a set of assemblies is
manufactured the assemblies in that production run are given a unique batch number. This batch number allows SSL to track the
movement and history of all assemblies it manufactures.
Matrix 2 Owner's Manual
130