Replacing The Low-Speed Channel-Ovtg; (Lc1A-F6Xx) Unit - Fujitsu FLM 150 ADM Maintenance And Trouble Clearing

Maintenance and Trouble Clearing
FJTU-320-515-480
4.16 Replacing the Low-Speed Channel–OVTG

(LC1A-F6xx) Unit

4.16.1 Overview
This procedure lists the steps required to replace a failed LC1A-F6, LC1A-F6C1,
or LC1A-F6T1 Low-speed channel unit.
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.
Review this procedure before attempting to replace the LC1A-F6, LC1A-F6C1, or
LC1A-F6T1 plug-in unit. 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
4.16: Replacing the Low-Speed Channel–OVTG
FNC and FNC Customer Use Only
(LC1A-F6xx) Unit
Vol. ll, Page 480.4-68