5. The repair is completed using the same epoxy-fiberglass mixture and repair techniques used in
the patching repair method discussed in the following section on burned board repair.
Burned Board Repair
Scorched, charred, or deeply burned boards should be inspected to determine the size of the
discolored area and to identify melted or blackened conductors and burned, melted, or blackened
components. The depth of the damage, which may range from a slight surface discoloration to a hole
burned through the circuit board, should also be determined. Damage not extending through the board
may be repaired by patching (figure 3-28). The following procedure is used in the repair of these boards.
Figure 3-28.Repair of surface damage.
If the board is scorched, charred, or burned, all discolored board material is removed by abrasive
methods, as shown in figure 3-29. Several components in the affected area may have to be
desoldered and removed before the repair is continued.
Figure 3-29.Repair of burned boards.