Model 5340A
Schematic Diagrams
SECTION
Vlll
SCHEMATIC DIAGRAMS
8
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1. SCHEMATIC DIAGRAMS
8
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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. The block diagrams give
a
simplified block of the corresponding schematic diagram. Test points, waveforms, and typical
voltages are given
as
an aid in troubleshooting.
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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
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5. Reference Designations
8
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6. Assemblies such
as
printed circuit boards are assigned numbers in sequence, Al, A2, etc.
As
shown in Figure 8
-
1, subassemblies within an 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.
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7.
Identification Markings on Printed
-
Circuit Boards
8
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8. HP printed circuit boards (see Figure 8
-
1) have four identifications numbers; an assembly
part number; a series number,
a
revision letter, and
a
production code.
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-
9. The assembly part number has
10
digits (such
as
05340
-
60037) and
is
the primary identifi
-
cation.
When
a
production
change
is
made
on
an
assembly that makes
it
incompatible with previous assemblies, a change
in
part
number is required. The series number (such
as
1248A)
is
used to document minor
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. If the manual change sheets are missing,
contact your local Hewlett
-
Packard Sales and Service Office. See the listing
on
the back cover
All assemblies with the same part number are interchangeable.
of this manual.
I
8
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10. Revision letters
(A, B,
etc.) denote changes in printed circuit layout. For example, if
a
capacitor type is changed (electrical value may remain the same) and requires different spacing
for its leads, the printed circuit board layout is changed and the revision letter
is
incremented
to the next letter. When
a
revision letter changes, the series number
is
also usually changed.
The production code
is'the'four digit, seven segment number used for production purposes.
'/
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11. ASSEMBLY LOkATIONS AND COMPONENT LOCATORS
8
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12. Figures 8
-
2 through
8
-
5
show the front, rear, top, and bottom views of the 5340A. Following
these is an overall block diagram and schematic diagrams for the instrument. Component
locators for each printed circuit assembly are located next to the schematics.
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1
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