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instrument, you will always obtain a reading of the proper polarity.
NOTE
Because you will be troubleshooting inside the unit with the dust cover
removed, you should never set POWER ON unless instructed to do so by
the Alinement or Troubleshooting procedure. Observe all safety pre-
cautions when working inside an energized unit.
Refer to Section VI for replacement procedures.
Refer to Figure FO-1, Top Internal View of AN/USM-213B for location of certain adjustments, parts and
assemblies.
Refer to top views of circuit card assemblies for location of components when troubleshooting the particular
section of the instrument to which the card illustration pertains.
After replacement of a component, perform the check procedure to make sure that the malfunction has been
eliminated.
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