Figure 1: Option A - Make two small
cuts with the knife and remove a
short section of circuit.
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| 1. |
Identify the circuit or short to be cut. Determine
from the artwork or drawings where the best
location is to make the break. The width of
the break should at least match the minimum
required electrical spacing.
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|
| 2. |
Clean the area. |
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|
| 3. |
Carefully make two small cuts with the knife
and remove the short section of circuit. (See
FIgure 1). Or use a Micro-Drill as covered in
the next step.
|
|
Figure 2: A high quality, Micro-Drill System is recommended
for this delicate operation.
|
| 4. |
Select the appropriate size ball mill and insert
it into the Micro-Drill System. Set the speed
to high. (See Figure 2). The ball mill should
be approximately the same width as the circuit
to be cut.
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| |
|
| |
Note
Ball mills should be dental grade
carbide steel for precision cutting and long
life.
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Figure 3: Make 1 or 2 cuts as needed
to cut circuit.
|
| 5.
|
Carefully make 1 or 2 cuts as needed.
(See Figure 3). |
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Caution
Exercise
care to avoid damage to adjoining circuits |
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|
| 6. |
Check continuity to be sure that
the circuit has been cut. |
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|
| 7. |
Clean the area. |
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|
| 8. |
Mix epoxy. If desired, add color agent to the
mixed epoxy to match the circuit board color.
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|
| 9. |
Coat the area with epoxy if needed. An epoxy
dispenser may be used to control the application
of epoxy. Remove any excess.
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|
| 10. |
Cure the epoxy per Procedure 2.7
Epoxy Mixing and Handling. |
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Figure 4:
Completed repair. |
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Evaluation |
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|
| 1.
. |
Visual examination of cuts for spacing, and
unintended damage to surrounding circuits.
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| |
|
| 2. |
Electrical tests as applicable. |
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