Chapter 2 51
Adjustment Procedures
Introduction
Safety Considerations
Although this instrument has been designed in accordance with
international safety standards, this manual contains information,
cautions, and warnings which must be followed to ensure safe operation
and to prevent damage to the instrument. Service and adjustments
should be performed only by qualified service personnel.
WARNING Adjustments in this section are performed with power supplied
to the instrument and protective covers removed. There are
voltages at many points in the instrument which can, if
contacted, cause personal injury. Be extremely careful.
Adjustments should be performed only by trained service
personnel.
WARNING Power is still applied to this instrument with the LINE switch
in the off position. Before removing or installing any assembly
or printed circuit board, remove the line-power cord.
WARNING Capacitors inside the instrument may still be charged, even if
the instrument has been disconnected from its source of supply.
WARNING Use a nonmetallic adjustment tool whenever possible.
Which Adjustments Should Be Performed?
Table 2-1 on page 52 lists the manual adjustments that should be
performed when an assembly is repaired or changed. It is important to
perform the adjustments in the order indicated to ensure that the
instrument meets its specifications.
Test Equipment
The equipment required for the manual adjustment procedures is listed
in Table 2-1 on page 52, "Recommended Test Equipment." Any
equipment that satisfies the critical specifications given in the table
may be substituted for the preferred test equipment.
If an HP 3335A is not available for performance tests, tests using
alternate test equipment are available. See Chapter 2a, “Adjustment
Procedures: HP 3335A Source not Available,” on page 131.
Adjustable and Factory-Selected Components
Table 2-2 on page 54 lists the adjustable components by reference
designation and name. For each component, the table provides a
description and lists the adjustment number.
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