Schematic Diagrams; Schematic Diagram Notes, Assembly Numbers. And Reference Designators; Reference Designations; Identification Markings On Printed-Circuit Boards - HP 5340A Operating And Service Manual

8-1. SCHEMATIC DIAGRAMS

8-2. This section contains schematic diagrams, assembly and chassis part locators, component
locators, block diagrams, waveforms, test points, and troubleshooting information. The sche-
matics are presented in assembly number order A1 through A35 The component, chassis, and
assembly locators show the location by reference designator.
simplified block of the corresponding schematic diagram. Test points, waveforms, and typical
voltages are given as a n aid in troubleshooting.
8-3. SCHEMATIC DIAGRAM NOTES, ASSEMBLY NUMBERS, AND
REFERENCE DESIGNATORS
8-4. Figure 8-1 shows the symbols used on the schematic diagrams. At the bottom of Figure 8-1,
the system for reference designators, assemblies, and subassemblies are shown.

8-5. Reference Designations

8-6. Assemblies such as printed circuit boards are assigned numbers in sequence, A l , A2, etc.
As shown in Figure 8-1, subassemblies within a n assembly are given a subordinate A number.
For example, rectifier subassembly A1 has the complete designator of A25A1. For individual
components, the complete designator is determined by adding the assembly number and sub-
assembly number if any. For example CR1 on the rectifier assembly is designated A25AlCR1.

8-7. Identification Markings on Printed-Circuit Boards

8-8. HP printed circuit boards (see Figure 8-1) have four identifications numbers; a n assembly
part number; a series number, a revision letter, and a production code.
8-9. The assembly part number h a s 10 digits (such as 05340-60037) and is the primary identifi-
cation. All assemblies with the same part number are interchangeable.
change made assembly that makes it incompatible with previous assemblies, a change
is
on an
in part number is required.
electrical changes. As changes are made, the series number is incremented. When replacement
boards are ordered, you may receive a replacement with a different series number. If there is a
difference between the series number marked on the board and the schematic in this manual, a
minor electrical difference exists. If the number on the printed-circuit board is lower than that
on the schematic, refer to Section VII for back dating information. If it is higher, refer to the
loose leaf manual change sheets for this manual.
contact your local Hewlett-Packard Sales and Service Office. See the listing
of this manual.
8-10. Revision letters (A, B,
capacitor type is changed (electrical value may remain the same) and requires different spacing
for its leads, the printed circuit board layout is changed a n d the revision letter is incremented
to the next letter. When
The production code is'the'four digit, seven segment number used for production purposes.
8-11. ASSEMBLY LOkATIONS AND COMPONENT LOCATORS
8-12. Figures 8-2 through 8-5 show the front, rear, top, and bottom views of the 5340A. Following
these is a n overall block diagram and schematic diagrams for the instrument.
locators for each printed circuit assembly are located next to the schematics.
SECTION Vlll
SCHEMATIC DIAGRAMS
The series number (such as 1248A) is used to document minor
etc.) denote changes in printed circuit layout. For example, if a
a revision letter changes, the series number is also usually changed.
Schematic Diagrams
The block diagrams give a
When a production
If the manual change sheets are missing,
on the back cover
Model 5340A
Component
8-1