Nautel XR6, Руководство по устранению неисправностей, Страница: 216 / 291

XR6/XR3 Troubleshooting Manual Reading Electrical Schematics
Page 5-4 Issue 3.0 2009-07-15
Locating a part or assembly on a schematic
The full reference designation assigned to a part or assembly is the key to physically locating that part
or assembly.
Refer to the family trees in Section 3, “Parts Lists” on page 3-1 with the full reference designation and
follow the family tree branches to the appropriate block, noting the name and Nautel nomenclature
number of all higher assemblies in the path.
Refer to Table 4.1 with the name and Nautel nomenclature number of each family tree block in the
path, starting at the highest assembly (normally Figure MD-1). Determine the figure number for that
assembly. Refer to the referenced figure and locate the next lower-level assembly. Repeat this
procedure until the desired part or assembly is found.
Note: Full reference designations contain the assembly hierarchical coding. When the
end item is divided into units (cabinets), the first coding is a unit number (1, 2, 3,
etc.). When the end item is divided into assemblies, the first coding is an assembly
number (A1, A2, A3, etc.). If a unit or an assembly is divided into sub-assemblies,
assembly coding that identifies assembly relationship (1A1, A2A1, A2A1A1, etc.) is
added.
Note: The drawings in Section 6, “Mechanical Drawings” on page 6-1 depict the
assembly detail of the transmitter and its modules and assemblies.
Note: Mechanical drawings for some assemblies may consist of more than one figure.