Cisco AGS+, Hardware Installation And Maintenance

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Troubleshooting
Overview
Probem
SoOvüig
The key
to problem
solving in
system
such
as this is to try to isolate
the problem
to
specific
subsystem By
comparing what
the system
is doing
to
what
it
should
be doing
the task of
isolating
problem
is greatly simplified
Consider the following
subsystems
Power
systemThis
subsystem includes the
power supply the Multibus
and ciscoBus
backplanes
and wiring and
the
AC
switch circuit
breaker
Cooling
systemThe blower
assembly
should come on
when
power
is applied
and
will
stay
on
even
if the
power
supply
fails
The blower assembly
is
connected
directly
to
the
AC
source
System
cardsThis
subsystem is the
most
difficult
to troubleshoot however the light-emitting
diodes
LEDs
on
the
cards and
appliques can be used
to
help
identify
failure
Note For complete
information on
reading interface
card
and
applique
LED
indicators refer to
Appendix Reading
LED
Indicators
System cablesThis
subsystem
includes
all
of
the
internal
and
external cables
that
interconnect
the cards and
their appliques
and
that
connect
the
chassis
to
the
network
The
following
troubleshooting
sections discuss these subsystems
in
more
detail
Troubeshoothig
the
Power
and Cooing Systems
Check
the following
items
to help isolate
the
problem
With
the
AC
switch on
does the
blower operate
If yes
the
AC
input
checks
out
If
no
suspect
the
AC
input
AC
source
chassis
circuit
breaker
or the
power
cable
With
the
AC
switch on and
system
LEDs
lit
the
blower
does
not operate
suspect
the blower
Does
the system shut
down
after
being
on
short time
on
Suspect an
ENVM-induced
thermal-related
shutdown
Check
the environmental
requirements
in Chapter
Preparing
for
Installation
and
make
certain that
the chassis intake and
exhaust
vents
are
clear
Suspect power
supply failure
System
partially
boots
and
LEDs
do
not light suspect
12V
and/or
5V
power
supply failure
4-2
AGS
Hardware
Installation
and Maintenance