User Manual
Table Of Contents
ADCP-75-126 • Issue B • April 2002 • Section 5: Maintenance
Page 5-1
©
2002,
ADC
Telecommunications,
Inc.
SECTION 5: MAINTENANCE
1 SYSTEM MAINTENANCE OVERVIEW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
1.1 Tools and Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
2 FAULT DETECTION AND ALARM REPORTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
3 FAULT ISOLATION AND TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-6
4 TEST PROCEDURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
4.1 Optical Power Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-11
4.2 Optical Loopback Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-12
5 MAINTENANCE PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-13
5.1 Scheduled Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
5.2 Remote Unit Cabinet Filter Cleaning Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
5.3 Host Unit Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-15
5.4 Spectrum Transport Module Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-17
5.5 Linear Power Amplifier Fan Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-19
_________________________________________________________________________________________________________
1 SYSTEM MAINTENANCE OVERVIEW
This
section
explains
the
Digivance
LRCS
fault
detection
and
alarm
reporting
system,
provides
a
method
for
isolating
and
troubleshooting
faults,
and
provides
test
and
maintenance
procedures.
The
Digivance
LRCS
requires
minimal
regular
maintenance
to
insure
continuous
and
satisfactory
operation.
Components
that
require
regular
replacement,
cleaning,
or
testing
include
the
HU
and
RU
fans
and
the
RU
air-filter
and
back-up
battery,
Maintenance
also
includes
diagnosing
and
correcting
service
problems
as
they
occur.
When
an
alarm
is
reported,
it
will
be
necessary
to
follow
a
systematic
troubleshooting
procedure
to
locate
the
problem.
Once
the
source
of
the
problem
is
isolated,
the
appropriate
corrective
action
can
be
taken
to
restore
service.
The
only
internal
components
that
can
be
replaced
are
the
cooling
fans
which
mount
in
the
HU,
RU,
and
LPA.
The
failure
of
any
other
component
within
a
unit
will
required
replacement
of
that
unit.
1.1 Tools and Materials
The
following
tools
and
materials
are
required
in
order
to
complete
the
procedures
in
this
section:
•ESD
wrist
strap
•IR
filtering
safety
glasses
• Patch
cords
with
SC
connectors
•15
dB
in-line
SC
optical
attenuators
•Optical
power
meter
(1550
and
1310
nm)
• Laser
light
source
•TORX
screwdriver
(with
T10
bit)