Navy Electricity and Electronics Training Series - Historic Naval ...

Figure 3-13.—Minimum distance lead bend to component body.• Leads must be approximately 90 degrees from their major axis to ensure free movement in holeterminations, as shown in figure 3-14.Figure 3-14.—Ideal lead formation.• In lead-forming, the lead must not be damaged by nicking.• Energy from the bending action must not be transmitted into the component body.COMPONENT PLACEMENT.—Where possible, parts are remounted or reassembled as theywere in the original manufacturing process. To aid recognition, manufacturers use a coding system ofcolored dots, bands, letters, numbers, and signs. Replacement components are mounted to make allidentification markings readable without disturbing the component. When components are mounted likethe original, all the identification markings are readable from a single point.Component identification reads uniformly from left to right, top to bottom, unless polarityrequirements determine otherwise, as shown in figure 3-15. To locate the top, position the board so thepart number may be read like a page in a book. By definition, the top of the board is the edge above thepart number.3-21