VX150 TO VX2 TROUBLESHOOTING MANUAL ELECTRICAL SCHEMATICS
PAGE 3.4.4 VERSION 2.0 2023-04-20
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.
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.
1. Refer to the family trees in Parts Information on page 3.2.1.
2. Follow the family tree branches to the block that contains the desired reference designation, while
noting the Nautel nomenclatures and names of all higher assemblies in the path. Example: A2
NAPI187A System Interface PWB.
NOTE:
The drawings in the Mechanical Drawings section depict the assembly detail of the transmitter
and its modules and assemblies.
3. Refer to Table 3.5.1 in Mechanical Drawings on page 3.5.1. Use the Nautel nomenclature and name
of each family tree block in the path, starting at the highest assembly – this is normally Figure
MD-1 – to determine the figure number(s) for that assembly. Example: NAPI187A System Interface
PWB is shown on MD-4.
4. Refer to the referenced figure (e.g., MD-4) in Mechanical Drawings on page 3.5.1 to locate the
desired part or assembly.
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