Locating Schematic Diagram(S) For A Functional Block; Locating A Part Or Assembly On A Schematic - Nautel NX15 Troubleshooting Manual

NX25/NX15 Troubleshooting Manual
Figures SD-1 through SD-4 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-4 , 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
contains the desired reference designation, and associated Nautel nomenclature (e.g.,
NAPA34A Modulator/Power Amplifier PWB ). Note the reference designations and Nautel
nomenclatures of all higher assemblies in the path.
Example: A15 NAP39A RF Power Module > A15A1 NAPA34A Modulator/Power Amplifier
PWB .
2. Refer to Table 5.1 on page 5-5
identify the appropriate schematic diagram(s).
Example: NAPA34A Modulator/Power Amplifier PWB is shown on schematic SD-24 .
3. If necessary, refer to the referenced figure (e.g., SD-24 ) 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.
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
Issue 5.0 2016-05-06
3-1. Follow the family tree branches to the block that
and use the reference designation and Nautel nomenclature to
Section 3, "Parts Lists" on page
Reading Electrical Schematics
3-1.
Page 5-3