HP 437B Service Manual

HP 437B
Table 8-2. Schematic Diagram Notes (1 of 8)
Test point symbols. Stars are numbered or lettered for easy correlation
of schematic diagrams, procedures, and locator illustrations.
Arrow connecting star to meas-
urement point signifies no
measuring aid provided.
Star shown connected to
circuit signifies measuring aid
(metal post, circuit pad, etc.)
provided.
Interconnection information.
Citcled letter indicates circuit
path continues on another
schematic diagram. Look for
same circled letter on service
sheet indicated by adjacent
bold number (3, in this
example).
Plug-in connection information.
Assembly
part
number
Socket
designation
for
A2
assembly.
Number indicates
Assembly name pin of socket (XA2).
Assembly designation
ae-e_
\
Stage name J3 not mounted
on assembly A2.
A2 DC REGULATOR ASSY (08708-60007)
SERIES
ABREGULATOR Sy,
Ql
1854-0071
REFERENCE DESIGNATIONS WITHIN OUTLINED 1—— --—)
ASSEMBLIES ARE ABBREVIATED FULL DESIGNATION IN
CLUDES ASSEMBLY NUMBER. eg, RI OF ASSEMBLY Al
13 alR1 DESIGNATIONS OF OTHER COMPONENTS ARE
COMPLETE AS SHOWN
rit
2500
Non-plug-in
connection
information.
Solder point
named.
REFERENCE DESIGNATION
Connector sy mbols within the NO PREFIX A2 ASSY
borderlines of circuit assemb-
; Sane : A2 Cl
lies signify connections to the 3 1
assembly which are separate from J Q
those made through the integral XA2 Rl
plug part of the assembly.
Circuit board common
Dagger indicates
circuit change. See
section VII.
Conducting connection
to chassis or frame.
NOT ASSIGNED
Asterisk indicates factory
selected components. (See
section V).
Value selected for best operation.
Value shown is average or most
commonly selected value.
Wire color code. Code used (MIL-STD-681) is the Reference designators deleted
same as the resistor color code. First number by circuit changes are listed
identifies the base color, second number the wider here.
stripe, and the third number the narrower stripe.
Example: denotes white base, yellow
wide stripe, violet narrow stripe.
Assembly reference designator(s).
Large numbers in lower right
corners of schematic diagrams
are service sheet numbers.
They are provided for con-
venience in tracing inter
connections.
List of all the reference desig-
nations on the diagram.
8-6 SERVICE

HP 437B Specifications

General

Brand	HP
Model	437B
Category	Measuring Instruments
Language	English