HP 437B Service Manual

SERVICE
8-1. General
Information
8-2. Service Sheets
8-5. Safety
Considerations
This section contains information required for servicing the Power Meter. It
includes block diagrams with theory and troubleshooting, schematic diagrams,
and schematic diagram notes.
The foldout pages in the last part of this section are called the service sheets
(SS). They contain block diagrams, schematic diagrams, supplemental
diagrams, and associated information.
8-3. Block Diagrams
The block diagram and related service information is found on Service Sheet
BD1. BDI is an overall block diagram that shows major functional sections
of the Power Meter. It serves as an index to the more detailed information
on the succeeding service sheets and is the starting point for most trouble
shooting procedures.
8-4. Schematic Diagrams
Service Sheet | is a detailed block diagram and mechanical assembly drawing
of the Al Display Assembly and the A2 Keyboard Assembly. These
assemblies are replaced as assemblies only, and SS1 is provided to show
interconnects between these assemblies and the A3 Digital board. The
schematic diagrams and their related information are presented in the
additional seven Service Sheets A3a, A3b, A3c, A3d, and Ada, A4b, Adc.
These diagrams, in functional groupings, are designed to aid in understanding
the principles of operation and to aid in troubleshooting the Power Meter.
Before applying power, verify that the instrument is properly set to operate
from the available line voltage and that the correct fuse is installed. An
uninterrupted safety earth ground must be provided from the main power
source to the instrument input wiring terminals, power cord, or supplied
power cord set.
SERVICE 8-1

HP 437B Specifications

General

Brand	HP
Model	437B
Category	Measuring Instruments
Language	English