HP 437B Service Manual

8-7. Test Equipment,
Tools, Aids, and
Information
HP 437B
Test equipment and test accessories required to maintain the Power Meter
are listed in Table 1-3, Recommended Test Equipment, Equipment other
than that listed may be used if it meets the critical specifications listed.
8-8. Service Tools
Equipment recommended for use when changing components on printed
circuit boards is listed in Table 8-1. The following unique service tools will
make servicing of this instrument much easier.
Pozidriv Screwdrivers. Many screws in the Power Meter appear to be
Phillips type, but they are not. To avoid damage to the screw heads, Pozidriv
screwdrivers should be used. The Pozidriv No. | size can be ordered as HP
part number 8710-0899, and the No. 2 size as HP part number 8710-0900.
Tuning Tools. For adjustments requiring non-metallic tuning tools, use the
blade tuning tool HP part number 8710-0033 or hex tuning tool (JFD Model
No. 5284) HP part number 8710-1010. For other adjustments, an ordinary
screwdriver is sufficient. No matter which tool is used, never force any
adjustment control against it stops. This is especially critical when adjusting
variable inductors or capacitors.
8-9. Assembly Locations
Printed circuit board assemblies are numbered sequentially from front to
back. For example, Al is part of the front panel assembly.
8-10. Parts and Cable Locations
The locations of individual components on the printed circuit boards and
other assemblies are shown adjacent to the schematic diagrams on the
appropriate service sheets. The complete reference designator consists of the
assembly designator plus the part designator. For example, A3R9 is resistor
R9 on the A3 assembly. For specific component descriptions and ordering
information, refer to Table 6-3, Replaceable Parts.
Mechanical parts have reference designators that begin with the letters MP.
Mechanical parts such as screws, washers, and nuts are listed in the
replaceable parts list.
SERVICE §-3

HP 437B Specifications

General

Brand	HP
Model	437B
Category	Measuring Instruments
Language	English