3-33
Figure 3-24.—Clinched-staple repair of broken conductor.
Pads or conductor runs may be completely missing from the board. These missing pads or runs must
be replaced. Also included in this type of damage are conductors that are present but damaged beyond
repair.
REPLACING DAMAGED OR MISSING CONDUCTORS.—The procedures used to replace
damaged or missing conductors are essentially the same as using the clinched-staple method of conductor
repair.
REPLACING THE TERMINATION PAD.—Many times the termination pad, as well as part of
the conductor, is missing on the board. In these cases, a replacement pad is obtained from a scrap circuit
board. Refer to figure 3-25 as you study each step.
Figure 3-25.—Replacement of damaged termination pad.
The underside of the replacement pad and the area where it will be installed is cleaned. An epoxy is
used to fasten the replacement pad to the board. An eyelet is installed to reinforce the pad before the
epoxy sets and cures. This ensures a good mechanical bond between the board and pad and provides good
electrical contact for components. After the epoxy cures, the new pad is lap-soldered to the original run.
