Canon CXDI-31 Service Manual page 4

B. Part No. Column
A part number marking is as follows :
General Parts
Standard Parts (Screws, washers, resistors, capacitors, etc.) of Standard Specification
Size number:
Revision Number:
Supplementary number:
Standard number:
This number is used to classify adjustment parts by size.
The marking is 000 for parts which need not be classified by size.
This number is used to distinguish new parts from old ones.
The number advances when they cease to be interchangeable due to
modification.
This is simply used to ensure the general and standard part number of
the same length. The marking is always 000.
This is used to indicate screw diameters, resistance values, etc.
3
Size number
Part number
Revision number
Characteristic number
Sorting number
0 0 0
Supplementary number
Part number
Revision number
Sorting number