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A method is described for connecting component leads 10 and 11 on opposite sides of a dual-sided, surface mount printed circuit card 12 with discrete wires as shown in Fig. 1.
English (United States)
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An Engineering Change Method for Dual-Sided, Surface Mount Printed
A method is described for connecting component leads 10 and 11 on
opposite sides of a dual-sided, surface mount printed circuit card 12 with discrete
wires as shown in Fig. 1.
In accordance with the new method, the original design of the printed circuit
card provides groups of unused plated-through-holes 14 (PTH, or via), to allow
for future engineering changes.
To connect lead 10 of a component 16 on one surface to lead 11 of a
component 17 on the opposite surface, a discrete wire 18 is soldered to the
component lead 10 and into one end of an unused PTH 16 on the bottom
surface. Another discrete wire 19 is then soldered into the opposite end of the
PTH 14 and to the other component lead 11 on the top surface.