6. CORRECTIVE MAINTENANCE
Overview
Note: Although procedure steps involving software commands can be performed via
the ASM (via an OA&M cut-through), someone must be present at the DRM office to
perform any hardware portions.
Corrective maintenance procedures are only performed when a fault condition
warrants intervention to restore Switching Complex equipment to proper operation.
Before performing any maintenance procedure, become familiar with the procedure
steps and pay particular attention to any Notes, Cautions,orDangers that
accompany a maintenance operation.
When handling circuit packs, ALWAYS observe the following cautions:
Caution 1: Handle circuit packs by their edges or face plate to avoid
deforming components and leads or scratching the gold plated connector
contacts. Contact damage or contamination can cause poor connections.
Caution 2: Before removing or inserting a circuit pack, power down the
circuit, unless otherwise specifically directed in a maintenance procedure.
Caution 3: When changing circuit packs in an attempt to locate a trouble,
always restore a pack to its original location if the replacement pack does not
clear the trouble. This will aid in isolating the trouble by returning the circuit
to its original configuration which existed at the time the failure was first
detected.
Caution 4: When handling circuit packs, always use care to avoid static
discharges. Circuit packs should remain in the antistatic shipping container
or in some other antistatic container until they are to be inserted. When
inserting or removing circuit packs, personnel should be properly grounded,
using a wrist strap connected to a frame ground or a designated ground
connect point.
235-200-150
January 2003
CORRECTIVE MAINTENANCE
Issue 3.00 Page 6-1
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