No periodic inspection or servicing of the Power Supply Unit and the 24 VDC Power Supply is required. The
preventive maintenance checks and services listed in table 2-6 should be performed whenever Direct Support
maintenance is performed on the units.
The following cleaning procedures for the Power Supply Unit and the 24 VDC Power Supply should be performed
whenever maintenance is performed on the units.
DO NOT USE ABRASIVE RUBBING COMPOUNDS OR SOLVENTS
TO CLEAN PAINTED SURFACES OR FRONT PANEL DISPLAYS.
PERMANENT DAMAGE TO SURFACES MAY RESULT.
a. Remove dust and loose dirt from all external surfaces using a clean soft lintless cloth. Remove grease, and
ground-in dirt from external surfaces using a clean soft lintless cloth dampened (not wet) with a mild detergent.
b. Remove dust and dirt from front panel connector insert/contact areas using a small soft-bristled brush.
AVOID AIR BLASTING PARTS, LEADS, AND WIRING BY TOO
CLOSE AN APPROACH WITH AIR JET NOZZLE.
c. Remove dust and loose dirt from all interior surfaces, including parts and wiring, using soft-bristled brushes in
conjunct&n with air jet.
When necessary to disturb the wiring dress, dressing should be noted,
and wiring restored to original position and dress after cleaning is
4-6. REPAIR AND REPLACEMENT.
Use normal shop practices when replacing faulty components or repairing wiring of the Power Supply Unit and
the 24 VDC Power Supply. Repair will consist of removal and replacement of faulty front panel and chassis
mounted piece parts. The Internal power supplies will be replaced as assemblies and forwarded to the
designated depot for repair. When replacing wires, ensure that the original wire dress Is maintained. Refer to
TM 11-6660-266-23P for complete drawings showing part locations and part requisitioning data.