Replacing The Oc-3 Optical Channel (Hc1A And Mc6A) Units - Fujitsu FLM 150 ADM Maintenance And Trouble Clearing

Maintenance and Trouble Clearing
FJTU-320-515-480
4.12 Replacing the OC-3 Optical Channel (HC1A and MC6A)
Units
4.12.1 Overview
This procedure lists the steps required to replace failed the HC1A and MC6A
OC-3 Optical units.
Refer to Section 2, Plug-In Unit Front-Panel Devices, in this practice for
descriptions of LEDs associated with each plug-in unit, and other front-panel
devices.
Refer to the Application Engineering practice, FJTU-320-515-120,
Appendix C, Hardware Options, for descriptions of plug-in unit hardware option
settings.
Refer to the Unit Descriptions practice, FJTU-320-515-000, for hardware option
default settings.
Review this procedure before attempting to replace the HC1A and MC6A optical
plug-in units. In addition, refer to Section 5.1, Handling Fiber Cables; Section 5.2,
Cleaning, Connecting, and Disconnecting the Optical Connectors; and Section 5.3,
Measuring Optical Power, located in this practice, to avoid damaging equipment.
WARNING:
During unit replacement, seat all plug-in units with a slow, but firm motion. Do not
push them quickly into the slot. Many critical units have longer power connector pins
to minimize power surges during unit replacement. A slow insertion method will
ensure that plug-in units are not damaged.
WARNING:
Wear an electrostatic discharge wrist strap with a minimum resistance of 1 megohm
when handling FLM units to prevent damage to the units. Before using the wrist strap,
check for opens, shorts and minimum resistance value. If the strap does not pass
these checks, do not use it.
DANGER:
Never look into the end of a fiber-optic cable, fiber cord, fiber pigtail, or fiber. If laser
light is present, you can suffer permanent eye damage or blindness . Even brief
exposure causes damage very quickly .
Issue 9, May 1999
4.12: Replacing the OC-3 Optical Channel (HC1A
FNC and FNC Customer Use Only
and MC6A) Units
Vol. ll, Page 480.4-49