Model Number - HP 400D Organizational, Ds, Gs, And Depot Maintenance Manual

INTRODUCTION TO ILLUSTRATED PARTS BREAK DOWN
6-1. GENERAL
6-2. This Illustrated Parts Breakdown lists and des-
cribes the parts applicable to the Vacuum Tube Volt-
meters, Models 400D, 400H, 400L, and H02-400D,
manufactured by Hewlett-Packard Co. The breakdown
consists of four sections as shown in the Table of Con-
tents.
6-3. GROUP ASSEMBLY PARTS LIST. The Group
Assembly Parts List (Section VII) consists of the complete
Voltmeter divided into six main assemblies or components
as shown in the Table of Contents. Each assembly listed
is followed immediately by its component parts indented
to show relationship to the assembly.
6-4. Part numbers are used to identify parts. A MIL-
type part number or a typical manufacturer and part
number are listed for each vendor part in the Group
Assembly Parts List. The actual part used may be
supplied by a different vendor, but in all cases the
Hewlett-Packard stock number remains the same. The
H-P Stock No. column is adjacent to the manufacturer
or military Part No. column.
6-5. The index numbers are numerically arranged in
the Group Assembly Parts List and are used mainly to
assist in locating a part in the Group Assembly Parts
List after it has been found in the Numerical Indexes
(Section VIII) or located on the figure which illustrates
that particular assembly.
6-6. The nomenclature of each part in the Group
Assembly Parts List is indented to indicate assembly
relationship. Each part is indented one column to the
right of the next higher assembly. When the details of
an assembly are shown on a different figure and parts
list, the nomenclature of that assembly is followed by
a parenthetical note stating in which figure and parts
list the details will be found.
6-7. Attaching parts are shown in the same indent as
the parts which they attach, and immediately following
the part. They are separated from the parts which they
attach by the words (ATTACHING PARTS). The attaching
parts are separated from the following assembly, or the
details of the assembly which they attach, by the symbol
When attaching parts are shown as attaching
two or more parts, the quantities of the attaching parts
are those required to attach the total number of the
assemblies or parts being attached.
6-8. The quantities listed in the "Units per Assy" column
of the Group Assembly Parts List are, in the case of
assemblies, the total quantity used in the Voltmeter
at the location indicated. In the case of component
parts indented under the assembly, the quantity listed
is the quantity used per assembly. The quantities
specified in any one entry, therefore, are not necessarily
the total used per complete Voltmeter. Refer to the
Numerical Indexes (Section VIII) for the total quantities
used per complete voltmeter.
00102-3
SECTION VI
6-9. USABLE ON CODE. Part variations within the
voltmeters are indicated by a letter symbol or com-
bination of letter symbols in parentheses immediately
following the figure and index number in the same column.
An explanation of the symbols used is outlined below.
In cases where the "Usable on Code" column has been
left blank, parts listed apply to all models covered by
this book.
USABLE
ON CODE
D
H
L
H02
6-10. PART NO. NUMERICAL INDEX. The Part Number
Numerical Index (Section VIII) is compiled in accordance
with the numerical part number filing system described
below:
a. Part number numerical arrangement starts at the
left-hand position of the part number and continues from
left to right, one position at a time, until part number
numerical arrangement is determined for all the part
numbers. In the Part No. Numerical Index the federal
stock number consists of a class code prefix followed
by a serial number or the part number; that is, when a
serial number has been assigned, the class code and
serial number form the stock number; when a serial
number has not been assigned, the class code and part
number form the federal stock number.
b. The order of precedence in the arrangement of
the part number is as follows:
(1) Space (blank position in the number)
(2) Dash (-)
(3)
Letters A through Z
(4) Numerals 0 through 9
Alphabetical 0's shall be considered as
numerical zeros
6-11.
In cases where the same part appears in several
assemblies and therefore has several different figure
and/or index numbers, the Part No. Numerical Index lists
the figure and index number of each appearance, and the
total quantity of the part used is given on the line with
the first figure and index number entry.
6-12. HEWLETT- PACKARD STOCK NO. INDEX. The
Hewlett-Packard Stock No. Index is a numerical index
of Hewlett-Packard stock numbers, arranged in alpha-
numerical form in the same manner as the Part No.
Numerical Index. The Hewlett- Packard Stock No. Index
follows the Part No. Numerical Index in Section VIII.
TM 11-6625-1514-15
Section VI
Paragraphs 6-1 to 6-12
MODE L NUMBER
400D
400H
400L
H02-400D
6-1