BFGoodrich PS-823 - Disassembly; Cover Removal

BFGoodrich Avionics
Systems,
Inc.
Component Maintenance
Manual
P/N
501-1075-()
Disassembly
1. General
Disassembly
procedures
are listed in
descending
order to allow
for
successive
accessibility
to
sub-
assemblies and components. These
procedures are intended
to
cover most aspects
of
disassembly.
De-soldering of components
and wires,
and the
replacement
of
items such
as switches,
fasteners,
and other simple
operations
are not
covered explicitly.
Technicians working on
avionics
equipment
of this
type
should have adequate
knowledge
of
avionics
shop practices prior
to attempting
any
repairs.
CAUTION:
READALL
THE
INFORMATION
IN
THISSECTIONPRIORTOANYATTEMPTTO
DISASSEMBLETHIS
UNIT.
Whenever
a
disassembly
procedure
involves
disconnecting
wires from components
and/or connector
Jl, it
is
best
to
tag, mark
or identify
the
wires that are
cut,
de-soldered
or otherwise
removed. If
wires are
cut, do so in a
manner that
provides an
adequate
wire
for
re-connections.
Numbers in
parenthesis
refer to index numbers of parts
on IPL Figure 1 in the Illustrates Parts
List section.
NOTE: Detailed
disassembly
procedures for the Battery Pack(s)
are
listed inthe
Repair
section and
testing
procedures in the Testing and
Fault
Isolation section
of this
manual.
Any
disassembly of
the
PS-823
for
repair or cleaning will require
functional
testing
after
re-
assembly
and
prior
to
installation.
See the Testing
and Fault
Isolation
section for functional test
procedures and
wiring diagrams.
WARNING: SEVERE
(3RDDEGREE)
BURNSANDMELTEDMETALPARTSCANRESULTTHROUGH
IMPROPER
HANDLINGOF
THE
LRUANDSUBASSEMBLIES.
THE
BATTERIESCONTAINEDWITHIN
THE
PS-823
ARE
CAPABLE
OF
PRODUCING
ANDSUSTAININGLARGECURRENTS
(OVER
50
AMPS)
FOR
SEVERALMINUTES.REMOVEALLJEWELRY
WHENWORKINGON
THISEQUIPMENT.
Place the
PS-823
on a stable, flat
surface
with
appropriate lighting.
Anticipate
placing fasteners and
other small components into containers to
prevent
loss. Take
special
note that the storage
batteries
contained in the
PS-823
are
charged
and are
capable
of
inflicting
burns and shocks. Mark any
wires
or connectors that are cut or
disconnected
to insure correct
re-assembly.
Do not proceed
with
disassembly without reading
this entire
section.
2.
Cover Removal
NOTE: Numbers in parenthesis
refer
to index numbers of parts on IPL Figure 1 in the
Illustrates Parts List section.
A.
Remove
Cover
Assembly
fasteners
(15
and
20).
B. Lift the
Cover
Assembly
(5) from the
unit
and place
to
the
side.
msmljtp202DisAssemblydisk
l 59
24-20-03
Page 30
1
Revision
A
June
30, 1999