BFGoodrich PS-823 - Page 46

BFGoodrich Avionics Systems, Inc.
Component Maintenance
Manual
P/N
101-1075-()
Corrective
Test
Procedure NormalIndication
Active
2.2
Cont.
c.
Place
25.0VDC-28.0VDC
switch to 28.0VDC.
d.
Place
PWR ON switch to ON
e.
Place
ON-OFF-CHARGE
switch
to
ON.
DC voltmeter shall
indicate 28.0Vdc.
2.3 Battery
Output
a. Perform test
2.2
steps a
and
b.
b.
Place
test
equipment switches to
the
following
positions:
Switch
Position
ON-OFF-CHARGE
ON
ØA
NO
LOAD
ØC
NO LOAD
4.6V
N/L
26.0V NO
LOAD
PWR
ON
PWR
ON
c. Place
25.0Vde-28.0Vde
switch
to
25.0Vdc.
DC
voltmeter
shall
Check isolation
NOTE: If the wrong reading is
obtained
in
indicate
24.0Vdc
or
circuitry
step c and the
reading
in step d is
higher.
correct, the isolation
circuitry
is
defective.
d.
Monitor
the voltage
across
each
battery
pack. Not less
than
24.5Vdc. Perform steps of
Paragraph
7.
NOTE:
Place
the
test
equipment
switches
to
the
positions
of Steps b
and c to
charge the
batteries.
e.
Place PWR ON
switch to
the center
position,
and
the
ON-OFF-CHARGE
switch
OFF.
2.4 Timing
Cycle
a.
Perform test
2.2 Steps a
and
b.
b.
Place PWR
switch
ON.
c.
Set the
stopwatch to zero.
Lamp
shall lightfor 150
+20,
-25
seconds
before
d.
Simultaneously
start the stopwatch,
place
ON-OFF-
. .
dimmmg
for the
PS-823A,
CHARGE
switch ON, and observe
the
timing
cycle
B, E,
F.
(180
Ø20
lamp
(DS2).
Stop
the stopwatch when
the lamp
seconds for the
PS-823C,
dims.
D,
G, H).
NOTE: Discharge timing
capacitor C8
by
momentarily shorting
before
repeating step d.
Otherwise wait 2
minutes
and
allow for
a
10%
shorter
time
out.
Performance
Test
with
JT-5
Test
Set
Figure
115 (Cont.)
msmljtp202TestFaultIsodiskl59
24-20-03
Page 126
Revision A June
30, 1999