Cleaning. - TM-38-2600073

TM 38-260

(b) Grasp the handle with one hand, but avoid touching any metal part of the grounding rod.

(d) Hold the metal probe against each terminal of each capacitor for several seconds to ensure complete

discharge of the capacitor.

(5) Removal of dry cells. Due to dry cells corroding in storage, they shall be removed from electronic

equipment and discarded. To assist in replacing them properly during reactivation, a tag bearing the following

information shall be attached to the equipment in the place of every dry cell: The identification number and the

description of the dry cell, and the Government tag number of the basic unit from which the dry cell was taken (fig 4-1).

A rubber stamp may be used for preparing the tag.

(6) Cleaning. Electronic equipment should be given a thorough external and internal cleaning. This

equipment, being constructed mostly of nonferrous materials, will not, in most instances, be contaminated by rust and

corrosion. However, due to the proximity of electronic equipment to production areas, contaminants such as dirt, dust,

oil, and, grease can find their way into this equipment.

(a) Extreme care must be exercised in the selection of a cleaning material to prevent damage to parts.

Solvents (and their vapors) may cause dimensional or chemical changes to insulation, wiring, or other susceptible

organic parts of critical electronic equipment.

(b) The cleaning materials and processes listed in chapter 2 shall be used to clean electronic equipment and

components. Solvents should only be used to clean parts contaminated with oils and greases. In most instances it will

only be necessary to use a soft-bristled brush, wiping cloths, and low pressure dry compressed air to accomplish the

cleaning.

CAUTION

EXERCISE EXTREME CARE WHEN CLEANING PLATED SURFACES. SOME

COMPONENTS MAY APPEAR TO BE SOLID COPPER OR SILVER, BUT ACTUALLY

THEY ARE ONLY COATED WITH THESE MATERIALS. NEVER, UNDER ANY

CONDITION, USE ABRASIVE MATERIALS FOR CLEANING ELECTRONIC

COMPONENTS.

(7) Avoiding recontamination. Cleaning should be so planned that when contaminants are being removed from

one part of the electronic equipment they are prevented from falling on parts that have already been cleaned. This can

be done by cleaning from top to bottom of the equipment and by cleaning inside surfaces of cabinets and cases before

cleaning the parts they enclose. Contaminants may be kept from falling on parts by temporarily spreading cloth or paper

over them.

(8) Special handling. The following electronic component parts require special cleaning or handling.

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