408-10014
Tight-Jacketed Fiber LC Connector Kits
Rev
D6
of 8 Tyco Electronics Corporation
Figure 10
Bend-Limiting Boot Against Rear Body
of Connector Subassembly
If machine polishing is not possible, hand polish the
fiber according to the following:
For optimum results, keep the polishing films
clean.
1. Level the fiber. Using a small piece of the 5–
m
m
(light grey) polishing film, lightly polish the endface
of the ferrule in a small circular motion to remove
the fiber stub down to the level of the epoxy or
adhesive and until the fiber stops leaving a trace
on the film.
2. Install the connector subassembly onto the
polishing bushing.
3. Place the polishing pad on the polishing plate.
Place the 9–
m
m polishing film on the polishing pad.
ALWAYS place the polishing bushing on a clean
area of the polishing film. NEVER start polishing
across a dirty area of the polishing film.
4. Holding the polishing bushing and connector
subassembly, place the polishing bushing on the
film. Using light pressure on the ferrule, polish in
an elongated figure–8 pattern (approximately
50.8 [2.0] long). Make 15 figure–8 patterns.
5. Clean the endface of the ferrule and the
polishing bushing with the alcohol pad or
alcohol–dampened lint–free cloth.
6. Remove the 9–
m
m polishing film from the
polishing pad, and place the fine diamond (green
or lavender) polishing film on the polishing pad.
Hold the assembly and, using very light pressure,
polish the tip of the fiber in an elongated figure–8
pattern (approximately 50.8 [2.0] long). Make six
figure–8 patterns.
7. Inspect the fiber according to Paragraph 3.10.
If small peripheral chips are evident in the fiber,
continue polishing the fiber with the fine diamond
film. Inspect the fiber again. If the fiber is not
acceptable, it might be necessary to use the 9–
m
m
polishing film, then use the fine diamond polishing
film to remove small peripheral chips.
MAKE SURE to clean the endface of the ferrule
and the polishing bushing between film changes.
8. Clean the endface of the ferrule and the
polishing bushing with the alcohol pad or
alcohol–dampened lint–free cloth.
9. Remove the fine diamond polishing film from the
polishing pad, and replace it with the 0.3–
m
m
(white) polishing film.
10. Holding the polishing bushing and connector
subassembly, place the polishing bushing on the
film, and using light pressure on the ferrule, polish
in an elongated figure–8 pattern (approximately
50.8 [2.0] long) according to the following:
— for multimode connectors, make three figure–8
patterns
— for singlemode connectors, make 12 figure–8
patterns
11. Clean the endface of the ferrule and the
polishing bushing with the alcohol pad or
alcohol–dampened lint–free cloth.
3.10.Inspect the Fiber
Before inspecting the fiber, DISCONNECT the
fiber from the power signal source. NEVER
inspect or look into the end of a fiber when
optical power is applied to the fiber. The infrared
light used, although it cannot be seen, can cause
injury to the eyes.
1. Using the fiber optic inspection microscope kit,
inspect the endface of the ferrule and fiber
according to the following criteria (refer to
Figure 11):
— Make sure that all adhesive or epoxy is removed
from the ferrule. Use a sharp blade to remove
adhesive or epoxy from the chamfered edge of the
ferrule. DO NOT touch the fiber.
— Dirt may be mistaken for small pits. If dirt is
evident, clean with the alcohol pad or
alcohol–dampened lint–free cloth, then dry.
— Fine polishing lines are acceptable.
— Small peripheral chips at the outer rim of the
fiber are acceptable.
— Large chips in the center of the fiber are
unacceptable, and the fiber must be re–terminated.
2. If not installing the connector immediately, install
the protective cover onto connector subassembly
to prevent contamination to the endface of the
ferrule.
NOTE
i
CAUTION
!
NOTE
i
DANGER