Nautel NV3.5, Troubleshooting Manual

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NV5/NV3.5 Troubleshooting Manual Reading Electrical Schematics
Issue 3.2 2014-12-10 Page 5-3
Figures
SD-1
through
SD-9
identify each major stage and its detailed interconnection. Each stage
contains cross-references that identify which blocks are the signal sources for inputs, or the
destinations for outputs.
When a sub-function is treated as a block in figures
SD-1
through
SD-9
, its detailed circuit
information is included in its own schematic drawing(s), which is also included in this section.
Locating schematic diagram(s) for a functional block
The text inside a functional block provides the key to locating its schematic diagram(s).
1. When a functional block is assigned a reference designation (e.g.,
A2A1
), refer to the family
trees in Section 3, “Parts Lists” on page 3-1 . Follow the family tree branches to the block that
contains the desired reference designation, and associated Nautel nomenclature (e.g.,
NAPI104/03 Power Module Interface PWB
). Note the reference designations and Nautel
nomenclatures of all higher assemblies in the path.
Example:
A18 NAA56/01D RF Power Module > A18A10 NAPI104/03 Power Module
Interface PWB
.
2. Refer to Table 5.1 on page 5-5 and use the reference designation and Nautel nomenclature to
identify the appropriate schematic diagram(s).
Example:
NAPI104/03 Power Module Interface PWB
is shown on schematics
SD-25
through
SD-27
.
3. If necessary, refer to the referenced figure in the schematics at the end of this section and
locate the next, lower-level assembly. Then, repeat this procedure until the desired schematic
diagram is found.
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.
1. Refer to the family trees in Section 3, “Parts Lists” on page 3-1 .
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.