Nortel Passport 15000, Hardware Installation And Maintenance, Page: 282 / 874

282 Chapter 17 Hardware procedures
241-1501-240 5.2S2
• The SFP module must not be installed when cleaning it. Remove, clean,
and insert each module one at a time to avoid installing it back in the
wrong socket module (port).
• Do not touch the circuitry inside the large open end of an SFP optical
module or you may cause the unit to malfunction. This end does not get
cleaned. See the figure “The open end of an SFP optical module”
(page 283).
• The procedure steps are based on the Application Note by Agilent
Technologies called “Inspection and Cleaning of Fiber Optic Transceiver
Ports”, May 2, 2002, revision 1.2.
Procedure steps
1 Remove the dust cap (if present) from the LC connector end of the SFP
module, as shown in the figure “The LC connector end of an SFP optical
module” (page 284). Store the dust cap in a clean anti-ESD bag.
2 Place the LC connector-end of the SFP module under the microscope so
that 1 of the 2 lenses is viewed.
3 Inspect the lens, then inspect the other lens.
4 On each lens that appears to be contaminated, press a dry swab gently
against the lens surface and rotate it 3 times in the same direction. Use a
new clean swab on each lens and discard the swab after 1 use.
5 Inspect the lenses with the microscope again.
If the lenses are clean, install the dust cap or proceed immediately with
installing the SFP module.
If a lens still shows contamination, continue to the next step.
6 Soak a swab in the cleaning fluid or IPA. Press it gently against the
surface of the lens and rotate it 3 times in the same direction. Repeat for
the second lens, as required, using a new swab. Discard a swab after 1
use.
7 Blow low pressure clean nitrogen or air onto the lens to remove solvent
residues. Do not use your breath.
8 Inspect the lenses with the microscope again.
If the lenses are clean, install the dust cap or proceed immediately with
installing the SFP module.
If a lens still shows contamination, use a different SFP module.