Maintenance
4–4 760A / 760D / 760N
Replaceable Electrical Parts List. The Replaceable Electrical Parts List is
arranged in assembly–by–assembly order, as designated by ANSI Standard
Y32.16–1975. The circuit number in the parts list is made up by combining the
assembly number and the circuit number.
EXAMPLE: R117 on A4 would be listed in the Replaceable Electrical Parts List
as A4R117.
In the Replaceable Electrical Parts List, assemblies are listed first, followed by
circuit board mounted parts in alpha numeric order.
Parts Locating Charts. The schematic diagrams are assigned location grids. A
parts locating chart for each assembly gives grid locations of components on that
schematic.
Assembly and Circuit Numbering. . The circuit board assemblies are assigned
assembly numbers. Figure 4–2 shows the location of the circuit board assem-
blies in this instrument.
A1 POWER SUPPLY BOARD
A2 FRONT PANEL
BOARD
A3 MAIN BOARD
REAR PANEL
Figure 4–2: Circuit board locations in the 760A/760D/760N
The part numbers for ordering these boards are given in Section 8, Replaceable
Electrical Parts.
Generally, each component is assigned a circuit number according to its
geographic location within an assembly.