Section
5-2225
Service
ADJUSTMENT PROCEDURE
INTRODUCTION
PURPOSE
The Adjustment Procedure is used to return the
instrument to conformance with the Performance
Requirement statements listed in Table 1-1. Adjust-
ments contained in this procedure should only be
performed after checks from the Performance
Check Procedure (Section 4) have indicated a need
for readjustment or after repairs have been made to
the instrument.
STRUCTURE
This procedure is structured into subsections, each
of which can be performed independently to permit
adjustment of individual sections of the instrument.
For example, if only the Vertical section fails to meet
the Performance Requirements or has been
repaired, it can be readjusted with little or no effect
on other sections of the instrument.
The Power Supply section, however, affects all other
sections of the instrument. Therefore, if repairs or
readjustments have been made that change the
absolute value of any of the supply voltages, the
entire Adjustment Procedure should be performed.
At the beginning of each subsection is a list of all the
front-panel control settings required to prepare the
instrument for performing Step 1 in that subsection.
Each succeeding step within a subsection should be
performed in sequence and in its entirety to ensure
that control settings will be correct for ensuing
steps. All steps within a subsection should be
completed.
use of equipment other than that recommended,
utilize the Minimum Specification column to deter-
mine whether available test equipment will suffice.
Detailed operating instructions for test equipment
are not given in this procedure. If more operating
information is required, refer to the appropriate test
equipment instruction manual.
LIMITS AND TOLERANCES
The limits and tolerances stated in this procedure
are instrument specifications only if they are listed in
the Performance Requirements column of
Table 1-1. Tolerances given are applicable only to
the instrument undergoing adjustment and do not
include test equipment error. Adjustment of the
instrument must be accomplished at an ambient
temperature between
+20°C and +30°C, and the
instrument must have had a warm-up period of at
least 20 minutes.
ADJUSTMENTS AFFECTED
BY
REPAIRS
1
Repairs to a circuit may affect one or more adjust-
ment settings of the instrument. Table
5-1
identifies
I
the adjustment(s) affected due to repairs or
replacement of components on a circuit board.
Refer to Table
5-1
if
a partial procedure is
performed or if a circuit requires readjustment due
to repairs to a circuit. To use this table, first find, in
the
leftmost column, the circuit that was repaired.
Then move to the right, across that row, until you
come to a darkened square, move up the column
and check the accuracy of the adjustment found at
the heading of that column. Readjust if necessary.
TEST EQUIPMENT REQUIRED
PREPARATION FOR ADJUSTMENT
Table 4-1 is
a
complete list of the test equipment
The instrument cabinet must be removed to perform
required
to accomplish both the Performance Check
the Adjustment Procedure. See the Cabinet remove
Procedure
in Section 4 and the Adjustment Pro-
and replace instructions located in the Maintenance
cedure in this section. To assure
accurate measure-
section of the manual.
ments, it is important that test equipment used for
making these checks meet or exceed the specifi-
All test equipment items listed in Table 4-1
in the
cations described in Table 4-1. When considering Performance Check section are required to
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by
ARTEK MEDIA
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